کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4378823 | 1617549 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The evolutionary pressure from fishing on size at maturation of Baltic cod
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
بوم شناسی، تکامل، رفتار و سامانه شناسی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Recent observations suggest fishing pressure is driving the evolution of smaller female maturation size in some fish stocks. We construct a general size-based theoretical framework to derive the rate and ultimate destination of this evolution based on life-history, community ecology and evolutionary theory. For Baltic cod (Gadus morhua), we find a maximum evolutionary rate of approximately â36âg/generation (â0.072âHaldanes) and optimum maturation size <250âg (meanâ50âg). Whilst this is consistent with many previous observations, it is substantially less than observed in rapidly declining cod stocks, suggesting additional evolutionary processes may affect them. Analysis of management remedies finds only an effective ban on fishing will halt the evolution. Unable to maximise fitness, the fish will remain under evolutionary stress for the foreseeable future.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Modelling - Volume 204, Issues 1â2, 24 May 2007, Pages 246-252
Journal: Ecological Modelling - Volume 204, Issues 1â2, 24 May 2007, Pages 246-252
نویسندگان
K.H. Andersen, K.D. Farnsworth, U.H. Thygesen, J.E. Beyer,