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In Bats and Whales, Convergence in Echolocation Ability Runs Deep

January 27, 2010

Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey. Now, two new studies in the January 26th issue of Current Biology, a Cell Press publication, show that bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated — all the way down to the molecular level.

The discovery represents an unprecedented example of adaptive sequence convergence between two highly divergent groups and suggests that such convergence at the sequence level might be more common than scientists had suspected.

“The natural world is full of examples of species that have evolved similar characteristics independently, such as the tusks of elephants and walruses,” said Stephen Rossiter of the University of London, an author on one of the studies. “However, it is generally assumed that most of these so-called convergent traits have arisen by different genes or different mutations. Our study shows that a complex trait — echolocation — has in fact evolved by identical genetic changes in bats and dolphins.”

A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time, the studies show. As a result, if you draw a phylogenetic tree of bats, whales, and a few other mammals based on similarities in the prestin sequence alone, the echolocating bats and whales come out together rather than with their rightful evolutionary cousins.

Both research teams also have evidence showing that those changes to prestin were selected for, suggesting that they must be critical for the animals’ echolocation for reasons the researchers don’t yet fully understand.

“The results imply that there are very limited ways, if not only one way, for a mammal to hear high-frequency sounds,” said Jianzhi Zhang of the University of Michigan, who led the other study. “The sequence convergence occurred because the amino acid changes in prestin that result in high-frequency selection and sensitivity were strongly favored in echolocating mammals and because there are [apparently] very limited ways in which prestin can acquire this ability.” Prestin is found in outer hair cells that serve as an amplifier in the inner ear, refining the sensitivity and frequency selectivity of the mechanical vibrations of the cochlea, Zhang explained.

Rossiter’s team, including Shuyi Zhang of East China Normal University, showed previously that the prestin gene has undergone sequence convergence among unrelated lineages of echolocating bats. These authors, along with Zhang’s team at Michigan, now show that convergence extends to echolocating dolphins.

“We were surprised by the strength of support for convergence between these two groups of mammals and, related to this, by the sheer number of convergent changes in the coding DNA that we found,” Rossiter said. “We were especially excited to discover that these changes are likely to be adaptive, and also that nonecholocating whales do not group with the bats but instead remain with their true relatives, the even-toed ungulates.”

Although they rely on a similar ability, in fact “bats and whales vary greatly in echolocation,” Michigan’s Zhang pointed out. “For example, bats use echolocation for ranges up to 3???? meters, whereas whales use for ranges up to >100 meters. More importantly, the speed of sound in air is about one-fifth that in water, making the information transfer during sonar transmission much slower for bats than for whales. Despite these gross differences, our findings suggest that the high-frequency acoustic sensitivities and selectivities of bat and whale echolocation appear to rely on a common molecular design of prestin.”

Comments

81 Responses to “In Bats and Whales, Convergence in Echolocation Ability Runs Deep”

  1. Pamela Hussey-6th Period on January 27th, 2010 7:19 pm

    1.) Some bats and toothed whales rely on sophisticated echolocation.
    2.) A hearing gene known as prestin in both bats and dolphins .
    3.) Prestin gene has undergone a sequence of convergence among unrelated lineages of echolocating bats.
    4.) Bats and Whales vary greatly in echolocation.
    5.) The speed of sound in air is about 1/5 that in water, making the information transfer during sonar transmission slower for bats than for whales.

  2. Matthew Eppard 1st Period :D on January 29th, 2010 8:43 am

    1) Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey.
    2) Now, two new studies in the January 26th issue of Current Biology, a Cell Press publication, show that bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated — all the way down to the molecular level.
    3) The discovery represents an unprecedented example of adaptive sequence convergence between two highly divergent groups and suggests that such convergence at the sequence level might be more common than scientists had suspected.
    4) “The natural world is full of examples of species that have evolved similar characteristics independently, such as the tusks of elephants and walruses,” said Stephen Rossiter of the University of London, an author on one of the studies.
    5) A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time, the studies show.

  3. Zach Bennett 1st period on January 29th, 2010 1:14 pm

    Only some bats and toothed whales rely on sophisticated echolocation
    The discovery represents an unpre cedented
    A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time

    Our study shows that a complex trait — echolocation — has in fact evolved by identical genetic changes in bats and dolphins.

    ”Bats and Whales vary greatly in echolocation

  4. Brandon Archer 5th period on January 30th, 2010 6:47 pm

    Some variatys of bats and toothed whales rely on echolocation.

    A special gene known as prestin is in both nats and dolphines.

    Whales and bats rely greatly on echolocation.

    Bats whales and dolphines are some of the only animals that rely on echolocation.

    Bats and whales have high frequency hearing.

  5. TARRELL CLEMONS 1ST PERIOD 1-23-10 on January 30th, 2010 10:43 pm

    Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey.A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time, the studBoth research teams also have evidence showing that those changes to prestin were selected for, suggesting that they must be critical for the animals’ echolocation for reasons the researchers don’t yet fully understand.
    ies show.

  6. Tonya Heathington 1st period on January 31st, 2010 11:02 pm

    1.Only some bats and toothed whales rely on sophisticated echolocation.
    2. Scientists also have evidence showing that those changes to prestin were selected for, suggesting that they must be critical for the animals’ echolocation for reasons the researchers don’t yet fully understand.
    3.Scientists showed previously that the prestin gene has undergone sequence convergence among unrelated lineages of echolocating bats.
    4.Although they rely on a similar ability, in fact “bats and whales vary greatly in echolocation,” Michigan’s Zhang pointed out.
    5.Despite these gross differences, our findings suggest that the high-frequency acoustic sensitivities and selectivities of bat and whale echolocation appear to rely on a common molecular design of prestin.”

  7. natalie seavers 6th on February 1st, 2010 8:34 am

    Some bats and toothed whales rely on sophisticated echolocation.

    A hearing gene known as prestin in both bats and dolphins .

    Prestin gene has undergone a sequence of convergence among unrelated lineages of echolocating bats.

    Bats and Whales vary greatly in echolocation.

    The speed of sound in air is about 1/5 that in water, making the information transfer during sonar transmission slower for bats than for whales.

  8. Kaila Poleon 4th Period on February 1st, 2010 8:40 am

    1. Only some bats and toothed whales rely on sophisticated ecolation

    2. They have high-frequency hearing

    3. Echolocation has evolved by identical genetic changes in bats and dolphins.

    4. A hearing gene,prestin, is in bats and dolphins.

    5. Bats and Dolphins have differences in their ecolation but they are alike all the way down to the molecule level.

  9. Andrew Hall 1st Period :D on February 1st, 2010 8:44 am

    1. Two new studies in the January 26th issue of Current Biology, a Cell Press publication, show that bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated.

    2. Some bats and toothed whales rely on sophisticated echolocation

    3.Whales are much bigger than bats but can use te same technique.

    4.Both bats and dolphins use Prestin.

    5.

  10. Andrew Crisp 1st on February 1st, 2010 8:56 am

    1.Only some bats and toothed whales rely on sophisticated echolocation.
    2.A hearing gene known as prestin in both bats and dolphin has picked up many of the same mutations over time.
    3.The echolocating bats and whales come out together rather than with their rightful evolutionary cousins.
    4.Despite these gross differences, our findings suggest that the high-frequency acoustic sensitivities and selectivities of bat and whale echolocation appear to rely on a common molecular design of prestin.
    5.The speed of sound in air is about one-fifth that in water, making the information transfer during sonar transmission much slower for bats than for whales

  11. Kaylee Thom 4th on February 1st, 2010 9:11 am

    1. Kinds of bats and toothed whales have a remarkable ability.
    2. The echolotation they use goes down to a deep level, the molecular level.
    3. The hearing gene that the bats and whales have is called prestin.
    4. The results show that there arevery limited ways to hear high frequency sound.
    5. But even though they have the ability, bats can hear up to 3 meters, where whales can hear up to 100 meters.

  12. madison extine 5th period on February 1st, 2010 1:09 pm

    only bats and some whales rely on sophisticated echolocation
    they were surpizedof some thing that is strength
    they were surprise about the adaption
    Although they rely on a similar ability, in fact “bats and whales vary greatly in echolocation

    A hearing gene known as prestin in both bats and dolphins

  13. Scott Urban 5th Period on February 1st, 2010 4:48 pm

    Our study shows that a complex trait has in fact evolved by identical genetic changes in bats and dolphin

    The speed of sound in air is about 20% that in water, making the info transfer during sonar transmission slower for bats than for wales

    A hearing gene known as prestin in both bats and dolphins

    bats use echolocation for ranges up to 3 meters

    whales use for ranges up to 100 meters

  14. hunter walker-1 on February 1st, 2010 5:01 pm

    1.Only a few whales and bats rely on sophisticated echolocation.
    2.Both the whale and bat rely on similar abilities.
    3.Prestin is found in outer hair cells that serve as an amplifier in the inner ear.
    4.Convergence extends to echolocating dolphins and bats.
    5.There are many different ways for a mammal to hear high-frequency sounds.

  15. gabrielle covey 5 period on February 1st, 2010 5:09 pm

    1 This article is about bats and whales.
    2 Some whales and bats rely on sophisticated echolocation.
    3 Prestin is found in outer hair cells that serve as an amplifier in the inner ear.
    4 Echolocation ability runs deep in bats and whales.
    5 Prestin is found in both of the animals amd posibly more

  16. Maysie Spears 4th period on February 1st, 2010 5:27 pm

    1. Some bats and toothed whales rely on sophisticated echolocation.
    2. A hearing gene, prestin, is in both bats and dolphons.
    3. Prestin had gone under a sequence of convergence.
    4. They rely on similar ability.
    5. Convergence extends to echoloctaing dolphins.

  17. Crystal Whitehouse --- 6th Period on February 1st, 2010 5:30 pm

    ~ Some bats and toothed whales rely on sophisticated echolocation to detect small prey.
    ~ Now, two new studies in a Cell Press publication show that bats’ and whales’ remarkable hearing it depends on are all the way down to the molecular level.
    ~ A hearing gene known as prestin in both bats and toothed whales has picked up many of the same mutations over time.
    ~ The bats and toothed whales vary greatly in echolocation.
    ~ Bats use echolocation for ranges up to 3 meters, whereas whales use for ranges up to 100 meters.

  18. Logan Knox 2nd on February 1st, 2010 5:31 pm

    1) some bats and toothed whales rely on sophisticated echolocation.
    2)The discovery represents an unprecedented example of adaptive sequence convergence between two highly divergent groups and suggests that such convergence at the sequence level might be more common than scientists had suspected.
    3)A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time.
    4)if you draw a phylogenetic tree of bats, whales, and a few other mammals based on similarities in the prestin sequence alone, the echolocating bats and whales come out together rather than with their rightful evolutionary cousins.
    5)bats use echolocation for ranges up to 3 meters.

  19. Tara Harville on February 1st, 2010 5:35 pm

    Some bats and toothed whales rely on sophisticated echolocation.
    They emit sonar pulses and process returning echoes to detect and track down small prey.
    A hearing gene known as prestin in both bats and dolphins has picked up many of the same mutations over time.
    If you draw a phylogenetic tree of bats, whales, and a few other mammals based on similarities in the prestin sequence alone.
    The echolocating bats and whales come out together rather than with their rightful evolutionary cousins.

  20. Elijah Hurskin 4th period 2/1/10 5:00 pm on February 1st, 2010 5:56 pm

    1)Some bats and toothed whales rely on sophisticated echolocation
    2)emiting sonar pulses and process returning echoes is echolocation
    3)it can be used to track down prey
    4)two new studies in the January 26th issue of Current Biology, a Cell Press publication.
    5)dolphins and bats have to different type of echolocation

  21. Ryan Chamberlain 1st Period Science:D on February 1st, 2010 6:06 pm

    Article Summary:

    1.Only some bats and toothed whales rely on sophisticated echolocation.

    2.Two new studies in an issue of Current Biology, a Cell Press publication, show that bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated.

    3.The discovery represents an unprecedented example of adaptive sequence.

    4.Stephen Rossiter of the University of London is an author on one of the studies.

    5.Jianzhi Zhang of the University of Michigan led the other study.

  22. Andrew Patterson on February 1st, 2010 6:31 pm

    scary

  23. Dylan Clark 4th period on February 1st, 2010 6:31 pm

    1) Some bats and whales use echolation to find small prey.
    2) Two studies in the latest Current Biology, a cell Press publication, show that bats’ and whales’ remarkable abiliity and the high frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated- all the way down to the molecular level.
    3) The prestin gene has undergone a sequence of convergence among unrelated lineages of echolocating bats.
    4) Bats and whales are very different in terms of echolocation.
    5) The speed int the air is just abot 1/5 that in the water which makes the data transfer during sonar transmission slower for bats than whales.

  24. Kathryn Walls 6th Period on February 1st, 2010 7:17 pm

    1*The speed of sound in air is about 1/5 that in water, making the information transfer during sonar transmission slower for bats than for whales.

    2*Prestin gene has undergone a sequence of convergence among unrelated lineages of echolocating bats.

    3*A hearing gene known as prestin in both bats and dolphins

    4*Bats and Whales vary greatly in echolocation.

    5*Some bats and toothed whales rely on sophisticated echolocation.

  25. amari anderson- ortiz p.1 on February 1st, 2010 7:41 pm

    1) Sometimes bats and toothed whales rely on sophisticated echolocation.

    2) Bats and whales have the incredible ability to hear high frequency noises.

    3) Bats ans whales might be in more common than scientists have realized.

    4) Their study shows that a trait has volved in the identical genetic changes bats and dolphins.

    5) They suggest that the high frequency hearing of a bat and whale rely on a common molecular design of prestin.

  26. Sam Neighbors 2nd on February 1st, 2010 8:26 pm

    1. Some bats and toothed whales rely on echolocation.

    2. A hearing gene known as prestin are in bats and dolphins.

    3.Dopans are somtimes called toothed wales.

    4.Bats and whales vary greatly in echolocation.

    5. The speed of sound in air is about 1/5 that in water, making the information transfer during sonar transmission slower for bats than for whales.

  27. John Parvin McBride-2nd on February 1st, 2010 9:11 pm

    1.) Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes.
    2.) Now, two new studies in the January 26th issue of Current Biology a Cell Press publication, show that bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated.
    3.) The discovery represents an unprecedented example of adaptive sequence convergence between two highly divergent groups.
    4.It suggests that such convergence at the sequence level might be more common than scientists had suspected.
    5.)A hearing gene known as prestin in both bats and dolphins has picked up many of the same mutations over time, the studies show.

  28. Takara Alexander 5th pd on February 1st, 2010 9:14 pm

    1.) Some bats and toothed whales rely on sophisticated echolocation.
    2.) A hearing gene known as prestin in both bats and dolphins .
    3.) Prestin gene has undergone a sequence of convergence among unrelated lineages of echolocating bats.
    4.) Bats and Whales vary greatly in echolocation.
    5.) The speed of sound in air is about 1/5 that in water, making the information transfer during sonar transmission slower for bats than for whales.

  29. Caroline Whorton 6th on February 1st, 2010 9:44 pm

    1. Bats process returning echoes.
    2. Bats and whales have really well hearing.
    3. Prestin is a hearing gene.
    4. Prestin can be found in outer hair cells.
    5. Prestin has undergone with bats.

  30. Owen Clarke 4th on February 1st, 2010 9:58 pm

    1.Bats and whales vary greatly in echolocation.
    2.They have evolved characteristics similarly.
    3.Tusks of elephants and walruses have evolved similarly.
    4.Amino acids change prestin result in high frequency selection.
    5.Prestin is found in outer hair cells.

  31. Rachel whorton 2nd on February 1st, 2010 10:14 pm

    1)Some bats and toothed whales rely on sophisticated echolocation.
    2) A hearing gene known as prestin in both bats and dolphin.
    3.) Prestin gene has undergone a sequence of convergence among unrelated lineages of echolocating bats.
    4.) Bats and Whales vary greatly in echolocation.
    5.) The speed of sound in air is about 1/5 that in water, making the information transfer during sonar transmission slower for bats than for whales.

  32. Raine Aslan - 4th period on February 1st, 2010 10:16 pm

    1. Some bats and toothed whales use echolocation.
    2. Their ability and the high-frequency hearing it depends on are shared at a much deeper level.
    3. A discovery suggests that such convergence at the sequence level might be more common than scientists had suspected.
    4. A hearing gene known as prestin in both bats and dolphins has picked up many of the same mutations over time.
    5. Bats and whales vary greatly in echolocation.

  33. Avery Wilson 4th per. on February 1st, 2010 10:44 pm

    Only some bats and whales rely on echolocation.
    The speed of sound in air is about one-fifth that in water.
    Bats use echolocation for ranges up to 3???? meters.
    Dolphins use echolocation of up to 100 meters.
    The echolation is called Prestin.

  34. Michael worshim - 6th on February 1st, 2010 10:50 pm

    Some bats And toothwhales rely on sophisticated-echolocation

    They emit sonar pulses

    Preston a hearing gene is in both bats and dolphins.

    Bats and whales vary greatly in echolocation

    Whales use echolocation for ranges up to greater than a 100 meters

  35. Connor Ferguson 1 period on February 1st, 2010 11:00 pm

    1.Bats and toothed whales rely on echolocation.
    2.A hearing gene called prestin is in bats and dolphins.
    3.The discovery is an example of adaptive sequence convergence between two groups.
    4.Research evidence shows that prestin is critical for the animals’ echolocation.
    5.Prestin gene has undergone sequence convergence of of echolocating bats.

  36. Courtney grays 6th on February 2nd, 2010 9:49 am

    1.Some bats and toothed whales rely on sophisticated echolocation.

    2. A hearing gene known as prestin are in bats and dolphins.

    3. A discovery suggests that such convergence at the sequence level might be more common than scientists had suspected.

    4.Research evidence shows that prestin is critical for the animals’ echolocation.

    5.Prestin is found in outer hair cells.

  37. Ebone Yarbrough on February 2nd, 2010 2:42 pm

    Scientists also have evidence showing that those changes to prestin were selected for, suggesting that they must be critical for the animals’ echolocation for reasons the researchers don’t yet fully understand.Bats and toothed whales rely on echolocation.A hearing gene known as prestin in both bats and dolphins has picked up many of the same mutations over time.Prestin is a hearing gene.

  38. deondre surles6th period on February 3rd, 2010 5:30 pm

    Some bats and toothed whales rely on sophisticated echolocation.

    Prestin is found in some outer hair cells.

    It is also in bats and whales.

    Bats and whale vary in echolocation.

    They emit sonar pulses.

  39. madeline Holifield 4th on February 4th, 2010 6:14 pm

    1.Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey.
    2.A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time, the studies show.
    3.Both research teams also have evidence showing that those changes to prestin were selected for, suggesting that they must be critical for the animals’ echolocation for reasons the researchers don’t yet fully understand.
    4.Prestin is found in outer hair cells that serve as an amplifier in the inner ear, refining the sensitivity and frequency selectivity of the mechanical vibrations of the cochlea.
    5.Despite these gross differences, our findings suggest that the high-frequency acoustic sensitivities and selectivities of bat and whale echolocation appear to rely on a common molecular design of prestin.

  40. alex 4th period on February 4th, 2010 6:29 pm

    1 Only some bats and toothed whales rely on sophisticated echolocation.

    2 A hearing gene, prestin, is in both bats and dolphons.

    3 Dolphins and bats have to different type of echolocation.

    4 Dolphins have echolocation that can reach 100 meters.

    5 Bats have echolocation up to 3 meters.

  41. Shaquera wade 6 on February 5th, 2010 9:32 am

    1.Some bats and toothed whales rely on sophisticated echolocation.
    2.Prestin is found in outer hair cells.
    3. hearing gene called prestin is in bats and dolphins.
    4.Research evidence shows that prestin is critical for the animals’ echolocation.
    5.Only some bats and toothed whales rely on sophisticated echolocation.

  42. andrew rice on February 6th, 2010 12:38 pm

    Andrew Rice Feb 6 5th period
    1. some bats and toothed whales rely on sophisticated echolocation.
    2.two new studies in the January 26th issue of Current Biology, a Cell Press publication
    3.bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level
    4.“The natural world is full of examples of species that have evolved similar characteristics independently
    5.A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time

  43. MaRhea Wood - 2nd period on February 7th, 2010 12:36 pm

    some bats and toothed whales rely on sophisticated echolocation

    a hearing gene known as prestin is in both bats and dolphins

    the echolocating bats and whales come out together rather than with their rightful evolutionary cousins

    the speed of sound in that in water, making the info transfer during sonar transmission slower for bats than whales

    whales use ranges up to 100 meters

  44. Marilyn Larry 6th feb.8,2010 on February 8th, 2010 4:01 pm

    Some variatys of bats and toothed whales rely on echolocation.
    A hearing gene, prestin, is in both bats and dolphons.
    .bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level.
    The natural world is full of examples of species that have evolved similar characteristics independently.
    A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time.

  45. Allison Dreisewerd - 4th period on February 8th, 2010 5:50 pm

    1. Some bats and toothed whales rely on sophisticated echolocation.
    2. A hearing gene, prestin, is in both bats and dolphons.
    3. Prestin had gone under a sequence of convergence.Prestin is also found in outer hair cells that serve as an amplifier in the inner ear, refining the sensitivity and frequency selectivity of the mechanical vibrations of the cochlea.
    4. The speed of sound in air is about 1/5 that in water, making the information transfer during sonar transmission slower for bats than for whales.
    5. Convergence extends to echoloctaing dolphins.

  46. Kathryn wilson 4th on February 8th, 2010 5:58 pm

    1.Bats and toothed whales rely on echolocation.
    2. Prestin, a hearing gene,is in bats and dolphins.
    3. Dolphins and bats have two different types of echolocation.
    4.Amino acids change prestin result in high frequency selection.
    5.Whales use for ranges up to 100 meters.

  47. Amanda Baer-Peckham 4th period on February 8th, 2010 8:03 pm

    Some bats and toothed whales rely on echolocation. A hearing gene is found in both bats and dolphins. This hearing gene is called prestin. Dolphins and bats however do not have the same kind of echolocation. Dolphins have echolocation that can reach up to a 100 meters. Bats have echolocation that can reach up to 3 meters.

  48. Ruhi Singh- 2nd period on February 8th, 2010 8:37 pm

    1. Some bats and toothed whales rely on echolocation.
    2.Prestin is a special gene is in both nats and dolphines.
    3.Bats and whales have high frequency hearing.
    4.Whwales and Bats vary in echolocation.
    5. The speed of sound in air is about one-fifth that in water.

  49. Max Stephenson 2nd on February 8th, 2010 9:21 pm

    Only some bats and toothed whales rely on sophisticated echolocation
    The discovery represents an unpre cedented
    A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time

    Our study shows that a complex trait — echolocation — has in fact evolved by identical genetic changes in bats and dolphins.

    ”Bats and Whales vary greatly in echolocation

    :P :D :) :( :|

  50. John Baudendistel - 4th on February 8th, 2010 9:38 pm

    Only a few whales and bats rely on sophisticated echolocation.

    This are article is about bats.

    This article is about whales.

    whales use ranges up too 100m

    Dolphins are smart.

  51. Taylor Brown (period 5) on February 8th, 2010 9:53 pm

    1.Bats and Dolphins have Prestin a hearing gene
    2.Prestin is found in outer hair cells
    3.Bats and whales vary greatly in echolocation
    4.The speed of the sound of air is 1/5 in water
    5.nonecholocating whales do not group with the bats only with their relatives

  52. Joshua Sanchez-6 on February 8th, 2010 10:49 pm

    1.Only some bats and toothed whales rely on sophisticated echolocation.
    2. They emit sonar pulses and process returning echoes, to detect and track down small prey.
    3.The discovery represents an unprecedented example of adaptive sequence convergence between two highly divergent groups and suggests that such convergence.
    4.“The natural world is full of examples of species that have evolved similar characteristics independently, such as the tusks of elephants and walruses.
    5.A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time, the studies show.

  53. Brett Baird 4th on February 9th, 2010 5:04 pm

    -only some bats and whales with teeth lean on sophisticated echolocation
    - in echolocation you learn to track down small prey
    -current biology is a cell press publication
    -stephen rossiter is an author on one of the studies
    - echolocation evolved by identical genetic changes in bats and dolphins

  54. sarah christopherson 5th on February 10th, 2010 1:21 pm

    1. only some bats and wales rely on sophisticated echolocation.
    2. two new studies in january 26 issue of Current biology.
    3. bats and wales vary greatly in echolocation.
    4. Michigan’s Zhang pointed out bats use echolocation for ranges up to 3????meters.
    5. wales range up to 100 m

  55. austin xayavong 5th on February 12th, 2010 11:54 pm

    1.Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey.
    2. A hearing gene, prestin, is in both bats and dolphons.
    3.A hearing gene known as prestin in both bats and dolphins.
    4.Despite these gross differences, our findings suggest that the high-frequency acoustic sensitivities and selectivities of bat and whale echolocation appear to rely on a common molecular design of prestin.
    5.It depends on are shared at a much deeper level than anyone would have anticipated all the way down to the molecular level.

  56. Kerry Dunn- 4th on February 15th, 2010 4:30 pm

    1. Some bats and toothed whales rely on echolocation to track doen pray.
    2. Prestin, a hearing gene, is in bats and dolphins.
    3. Bats and whales vary greatly echo;ocation.
    4. Bats use it for ranges up to 3 meters.
    5. Whales use it for ranges up to 100 meters.

  57. Elizabeth Sanders 1st period on February 15th, 2010 5:36 pm

    Article Summary for February 15, 2010
    1. Current biology is a cell press publication.
    2. Bats and toothed whales rely on echolocation.
    3. Bats and whales vary greatly in echolocation.
    4. Bats use echolocation for ranges up to 3 meters.
    5. The echolocating bats and whales come out together rather than with their rightful evolutionary cousins.

  58. mauhaun 1 on February 15th, 2010 8:29 pm

    1.Bats and toothed whales rely on sophisticated echolocation.
    2.Prestin is found on the outside layer hair.
    3.BAts and whales have the same hearing gene.
    4.In the ocean the speed of sound of air is 1/5.
    5.Dolphins are one of the smartest animals.

  59. brett stoddard 5th period on February 16th, 2010 12:45 pm

    An amount bats and whales that have teeth rely on sophisticated echolocation

    They have sonar pulses and process returning echoes

    They were givin this gift so that they can track down prey

    Bats and whales have high-frequency hearing

    Its at deeper levels than anyone would have experienced.

  60. Reagan Locke 4th on February 21st, 2010 8:44 pm

    Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey. Dolphins and bats have two different types of echolocation. Prestin is found in outer hair cells that serve as an amplifier in the inner ear, refining the sensitivity and frequency selectivity of the mechanical vibrations of the cochlea. Prestin can be found in outer hair cells. Amino acids change prestin result in high frequency selection.

  61. shaquera wade 6th on February 22nd, 2010 12:41 pm

    1.Bats and whales have high-frequency hearing.
    2.Its at deeper levels than anyone would have experienced.
    3.Bats use echolocation for ranges up to 3 meters.
    4.Whales use it for ranges up to 100 meters.
    5.Prestin is found in outer hair cells.

  62. Derrell Patton on February 22nd, 2010 3:22 pm

    1.Only some bats and toothed whales rely on sophisticated echolocation.
    2. Scientists also have evidence showing that those changes to prestin were selected for, suggesting that they must be critical for the animals’ echolocation for reasons the researchers don’t yet fully understand.
    3.Scientists showed previously that the prestin gene has undergone sequence convergence among unrelated lineages of echolocating bats.
    4.Although they rely on a similar ability, in fact “bats and whales vary greatly in echolocation,” Michigan’s Zhang pointed out.
    5.Despite these gross differences, our findings suggest that the high-frequency acoustic sensitivities and selectivities of bat and whale echolocation appear to rely on a common molecular design of prestin.”

  63. Chase R. Massey 5th period on March 1st, 2010 8:42 am

    1. Bats and whales have high-frequency hearing.
    2. Presin is found on the outer hair cells
    .3. Whales use it for up to 100 meters.
    4. Bats and wales vary greatly on echolocation.
    5. The speed of the sound of air is 1/5 in water.

  64. James Russell 6th on March 1st, 2010 4:35 pm

    1. Some bats and whales rely on echolocation.

    2. They have sonar pulses and process returning echoes.

    3. Prestin is found on the outside layer hair.

    4. Wales range up to 100 m long.

    5. Current biology is a cell press publication.

  65. Summer Berthelson-4th period 3/1/09 on March 1st, 2010 6:43 pm

    ~A special gene known as prestin is found in both bats and whales
    ~Bats and whales vary greatly in echolocation
    ~Only some bats and toothed whales rely on sophisticated echolocation
    ~They use it to track down small prey
    ~Bats use this up to 3 meters whereas whales can use this up to100 meters

  66. emily wyte 4th on March 1st, 2010 10:26 pm

    1) only some bats and whales rely on sophisticated ecolatio
    2) bats and dolphins have prestin a hearing gene
    3) dolphins and bats have different types of echoloation
    4)

  67. Tara Harville- 1st per. on March 1st, 2010 10:47 pm

    Only some bats and toothed whales rely on sophisticated echolocation.

    Studies show that bats’ and whales’ have remarkable ability and the high-frequency hearing and depends on are shared at a much deeper level than anyone would have anticipated.

    Hearing gene known as prestin in both bats and dolphins has picked up many of the same mutations over time, the studies show.

    If you draw a phylogenetic tree of bats, whales, and a few other mammals based on similarities in the prestin sequence alone, the echolocating bats and whales come out together rather than with their rightful evolutionary cousins.

    The high-frequency acoustic sensitivities and selectivities of bat and whale echolocation appear to rely on a common molecular design of prestin.

  68. Max Stephenson 2nd on March 7th, 2010 9:54 pm

    Only some bats and toothed whales rely on sophisticated echolocation
    The discovery represents an unpre cedented
    A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time

    Our study shows that a complex trait — echolocation — has in fact evolved by identical genetic changes in bats and dolphins.

    ”Bats and Whales vary greatly in echolocation

    :) :D :) :D :) :D :) :D :) :D :) :D :) :D :) :D :) :D

  69. Kris L. 2nd period on March 8th, 2010 6:59 pm

    1.Only some bats and toothed whales rely on sophisticated echolocation.
    2. A hearing gene known as prestin in both bats and dolphins (a toothed whale) has picked up many of the same mutations over time, the studies show.
    3.Both research teams also have evidence showing that those changes to prestin were selected for.
    4.Rossiter’s team, including Shuyi Zhang of East China Normal University, showed previously that the prestin gene has undergone sequence convergence.
    5.Although they rely on a similar ability, in fact “bats and whales vary greatly in echolocation,” Michigan’s Zhang pointed out.

  70. Savannah Watson 2nd on March 22nd, 2010 8:08 pm

    1. Some whales and bats use echolocation, wich is when they sonar pulses and process echoes, to find small prey.

    2. A hearuing gene called prestin that has caused bats and whales to mutilate.

    3. Prestin is found on the outter hair cells and used as a sound amplifier in the inner ear.

    4. The prestin gene has undergone sequence movmnent among unrelated lineages of echolocating bats.

    5. , Bats use echolocation ranges up to 3… meters, but whales use ranges up to 100 meters.

  71. Jenna Marshall 1st period on March 22nd, 2010 9:32 pm

    ~Only some bats and toothed whales rely on echolocation.

    ~ A hearing gene know as prestin are in both bats and dolphins.

    ~ Bats and whales vary greatly in echolocation.

    ~ Prestin gene has undergone a sequence of convergence.

    ~Prestin is found in outer hair cells that are an amplifier in the inner ear.

  72. Devin Platts 1st on March 22nd, 2010 9:47 pm

    1.Only some bats and whales rely on sophisticated ecolatio.
    2. Prestin is found in outer hair cells.
    3.Two new studies in january 26 issue of Current biology.
    4.Whales use ranges up to 100 meters.
    5. A hearing gene, prestin, is in both bats and dolphons.

  73. Terrell King 2cnd period on March 26th, 2010 11:36 am

    1.a whale is able to do almosst the same as a bat
    2.a bat is just like a whle accept its smaller than a whale and can fly
    3.they both are deep in this
    4,there ability is incredible
    5.there are both animals

  74. austin xayavong 5th on April 4th, 2010 10:02 pm

    1.Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey.
    2. A hearing gene, prestin, is in both bats and dolphons.
    3.A hearing gene known as prestin in both bats and dolphins.
    4.Despite these gross differences, our findings suggest that the high-frequency acoustic sensitivities and selectivities of bat and whale echolocation appear to rely on a common molecular design of prestin.
    5.It depends on are shared at a much deeper level than anyone would have anticipated all the way down to the molecular level and stuff.

  75. Chase R. Massey-5th Period on April 12th, 2010 3:58 pm

    1. Bats and whales have high-frequency hearing.
    2. Presin is found on the outer hair cells.
    3. Whales use it for up to 100 meters.
    4. Some bats and whales rely on echolocation.
    5. They vary greatly on echoloctation.

  76. stephen doran 2nd on April 13th, 2010 6:18 pm

    1. some bats are toothed, but wheals rely on sophisticated echolocation
    2. bats have a special gene called pristion
    3. prestion is found in outter hair cells

  77. Elijah Hurskin 4th period on April 19th, 2010 5:29 pm

    1)Only some bats and toothed whales rely on sophisticated echolocation.
    2)echolocation is in which they emit sonar pulses and process returning echoes, to detect and track down small prey.
    3)Now, two new studies in the January 26th issue of Current Biology, a Cell Press publication, show that bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated — all the way down to the molecular level
    4)The discovery represents an unprecedented example of adaptive sequence convergence
    5)It is between two highly divergent groups and suggests that such convergence at the sequence level might be more common than scientists had suspected.

  78. Will Cook 4th Period on April 22nd, 2010 9:42 am

    1. only some bats and whales rely onecholocation
    2. echolocation is where they send sonar pulses to track small prey
    3. presin is found in the outer hair cells
    4. whale use it for up to 100 meters
    5. presin is inbothbats and whales

  79. matthew edmondson 2nd pd on April 22nd, 2010 7:56 pm

    Only some bats and toothed whales rely on sophisticated echolocation, in which they emit sonar pulses and process returning echoes, to detect and track down small prey. Now, two new studies in the January 26th issue of Current Biology, a Cell Press publication, show that bats’ and whales’ remarkable ability and the high-frequency hearing it depends on are shared at a much deeper level than anyone would have anticipated — all the way down to the molecular level.

    The discovery represents an unprecedented example of adaptive sequence convergence between two highly divergent groups and suggests that such convergence at the sequence level might be more common than

  80. Takara Alexander 5th pd on April 26th, 2010 12:46 pm

    1.) Some bats and toothed whales rely on sophisticated echolocation.
    2.) A hearing gene known as prestin in both bats and dolphins .
    3.) Prestin gene has undergone a sequence of convergence among unrelated lineages of echolocating bats.
    4.) Bats and Whales vary greatly in echolocation.
    5.) The speed of sound in air is about 1/5 that in water, making the information transfer during sonar transmission slower for bats than for whales

  81. deondre surles 6th period on April 26th, 2010 4:03 pm

    Some toothed whales rely on sophisticated echolocation.

    Prestin is found in some outer hair cells.

    It is also in bats and whales.

    Bats and whale vary in echolocation.

    They emit sonar pulses.

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