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Updated: Jun 21, 2026

Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout (Salvelinus namaycush) from Its Prey
12:24

Laboratory Estimation of Net Trophic Transfer Efficiencies of PCB Congeners to Lake Trout (Salvelinus namaycush) from Its Prey

Published on: August 29, 2014

最低着陆尺寸法规的意想不到的进化后果:渔业诱导进化的证据和影响

Airam Guerra-Marrero1,2, Javier Baixauli-Rodríguez2, Ana Espino-Ruano2

  • 1Faculty of Education, Universidad del Atlántico Medio, Las Palmas de Gran Canaria, Spain.

PloS one
|March 2, 2026
PubMed
概括

加那利群岛的休渔业显示出转向多物种捕捞,鱼类大小下降,鱼类大小低于生殖成熟度. 目前的法规需要更新至L95和收获槽限制,以实现可持续的渔业和海洋生物多样性保护.

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Optimal Foraging

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Speciation Rates

Speciation can proceed at markedly different rates, and evolutionary biologists commonly describe these differences through the models of gradualism and punctuated equilibrium. Both patterns explain how new species arise, but they differ in the tempo and continuity of evolutionary change. In both cases, evolutionary change arises from heritable variation within populations, with natural selection often shaping traits that improve survival and reproduction under specific environmental conditions.
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Mutation, Gene Flow, and Genetic Drift

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Limits to Natural Selection

Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.For one, natural selection can only act upon existing genetic variation. Hypothetically, redtusks may enhance elephant survival by deterring ivory-seeking poachers. However, if there are no gene variants—or alleles—for redtusks, natural selection cannot increase the prevalence of...
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Genetic Drift

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The Evidence for Evolution

Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.The collection of fossils within sedimentary rocks give a record of common ancestry and often depicts the history of evolution.