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Want Sustainable Fishing? Keep Only Small Fish, And Let The Big Ones Go

Scientists at the University of Toronto analysed Canadian fisheries data to determine the effect of the “keep the large ones” policy that is typical of fisheries. What they found is that the effect of this policy is an unsustainable fishery.

In fact, the opposite policy (keep the small young ones and throw back the large old ones) would result in a more sustainable fishery. In short — a big fish in the water is worth two in the net.

Put simply, a fish population will produce more young — and therefore sustain more fishing — if it is made up of big, old fish.

The team of scientists, led by Paul Venturelli, a graduate student in the Department of Ecology and Evolutionary Biology, used a simple population model, as well as evaluating data from 25 marine fish species. They also tailored their methods to allow for other possible causes for the results, such as the effect of climate.

Finding ways to replenish fishery stocks and improve management provides both ecological and financial benefits.

The research is published in the Proceedings of the Royal Society B.

Short URL: http://chandadavis.net/?p=834

10 Comments for “Want Sustainable Fishing? Keep Only Small Fish, And Let The Big Ones Go”

  1. Natalie Seavers 6th

    The scientist found at University of Toronto that keepint the small fish are two big ones .

    The saying keep the big ones and let the little ones go is now being flip floped for keep the smalls instead of the larges.

    Simply the idea is that if you take smaller fish there will be more fish later because the big ones are the makes of the babbys.

    the scientist at the university say by the encrease of the population of fish the price will go down when they catch more.

    I think this is cool even tho i do not eat fish it is a great way to save them.

  2. Maysie Spears- 4th period

    Some scientists in Toronto say that if you want more effiencencey in catching fish, you should keep the small fish then let all of the big ones go. They say this because the younger ones don’t produce other fish until they are older. You should let the big ones go because they produce other fish which makes it more effective for fishermen. The scientists looked over their methods to look for other possible reasons such as the weayther, or climate. So as you can see this is a new way of more effective fishing.

  3. Becky Stewart - 4th Period

    The opposite policy is keep the small young ones and throw back the old large ones. The theory is that 1 big fish in the water is two fish in the net. If you let the big fish stay in the water, they will produce babies, creating more fish to catch. If you catch little ones, it will help the population get bigger by letting the older ones produce. Scientists tested all of these strategies in different climates and they all had different effects.

  4. Tonya Heathington 1st period

    This article is about keeping only small fish and letting the big ones go.
    1.Scientists at the University of Toronto analysed Canadian fisheries data to determine the effect of the “keep the large ones” policy that is typical of fisheries
    2.In fact, the opposite policy (keep the small young ones and throw back the large old ones) would result in a more sustainable fishery.
    3.Put simply, a fish population will produce more young — and therefore sustain more fishing — if it is made up of big, old fish.
    4.The team of scientists, led by Paul Venturelli, a graduate student in the Department of Ecology and Evolutionary Biology, used a simple population model, as well as evaluating data from 25 marine fish species.
    5.They also tailored their methods to allow for other possible causes for the results, such as the effect of climate.

    I LOVE MRS.DAVIS!!!!!!

  5. kathryn walls 6th period science

    1)I learned that one big fish in the water is like two in a net.
    2)A fish population would produce more young
    3)Scientists at the University of Toronto analysed Canadian fisheries data to determine the effect of the “keep the large ones” policy that is typical of fisheries.
    4)The team of scientists, led by Paul Venturelli, a graduate student in the Department of Ecology and Evolutionary Biology, used a simple population model, as well as evaluating data from 25 marine fish species
    5)They found is that the effect of this policy is an unsustainable fishery.

  6. Derrell Patton 1st periode

    1.Scientists at the University of Toronto analysed Canadian fisheries data to determine the effect of the “keep the large ones” policy that is typical of fisheries
    2.In fact, the opposite policy (keep the small young ones and throw back the large old ones) would result in a more sustainable fishery.
    3.Put simply, a fish population will produce more young — and therefore sustain more fishing — if it is made up of big, old fish.
    4.The team of scientists, led by Paul Venturelli, a graduate student in the Department of Ecology and Evolutionary Biology, used a simple population model, as well as evaluating data from 25 marine fish species.
    5.They also tailored their methods to allow for other possible causes for the results, such as the effect of climate.

  7. Ryan Chamberlain 1st Period Science:D

    Article Summary:

    1.Scientists at the University of Toronto calculated that Canadian fisheries data to determine the effect of the “keep the large ones” policy that is typical of fisheries.

    2.Keeping the smaller Fishesand throwing back the larger fishes would result in a more sustainable fishery.

    3.The Scientists also found that a big fish in the water is worth two in the net.

    4.Simply, a fish population will produce more young, and therefore sustain more fishing.

    5.The research is published in the Proceedings of the Royal Society B.

  8. Most people will catch small fish, throw them back, and keep a big fish they catch. Theory shows that you should do the exact opposite. The theory is that if you throw big fish back, they will be able to reproduce to keep fish population up. Then you can keep all the small fish. One large fish in the water is like two in the net.

  9. zach bennett 1 st period

    Scientists at the University of Toronto analysed Canadian fisheries data to determine the effect of the large fish

    the younger ones don’t produce other fish until they are older

    They also tailored their methods to allow for other possible causes for the results

    a fish population will produce more young — and therefore sustain more fishing

    Paul Venturelli, a graduate student in the Department of Ecology and Evolutionary Biology, used a simple population model, as well as evaluating data from 25 marine fish species

  10. Matthew Eppard 1st Period

    1. The scientist found at University of Toronto that keepint the small fish are two big ones .

    2. The saying keep the big ones and let the little ones go is now being flip floped for keep the smalls instead of the larges.

    3. Simply the idea is that if you take smaller fish there will be more fish later because the big ones are the makes of the babbys.

    4. The scientist at the university say by the encrease of the population of fish the price will go down when they catch more.

    5. I think this is cool even tho i do not eat fish it is a great way to save them.

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