Density‐dependent natural selection mediates harvest‐induced trait changes
Copyright policy )Density‐dependent natural selection mediates harvest‐induced trait changes
Abstract Rapid life‐history changes caused by size‐selective harvesting are often interpreted as a response to direct harvest selection against a large body size. However, similar trait changes may result from a harvest‐induced relaxation of natural selection for a large body size via density‐dependent selection. Here, we show evidence of such density‐dependent selection favouring large‐bodied individuals at high population densities, in replicated pond populations of medaka fish. Harvesting, in contrast, selected medaka directly against a large body size and, in parallel, decreased medaka population densities. Five years of harvesting were enough for harvested and unharvested medaka populations to inherit the classically predicted trait differences, whereby harvested medaka grew slower and matured earlier than unharvested medaka. We show that this life‐history divergence was not driven by direct harvest selection for a smaller body size in harvested populations, but by density‐dependent natural selection for a larger body size in unharvested populations.
Artificial intelligence, Adaptive landscapes, [SDV]Life Sciences [q-bio], Natural selection, Trait, Evolutionary biology, Plant Science, Agricultural and Biological Sciences, Selection (genetic algorithm), Natural (archaeology), Cannibalism, Body Size, Global change, [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], Statistics, Fishes, Life Sciences, Body size, Dynamic Modeling of Plant Form and Growth, Programming language, [SDV] Life Sciences [q-bio], [SDV.EE] Life Sciences [q-bio]/Ecology, environment, Phenotype, Energy allocation rules, [SDE]Environmental Sciences, Asymmetric competition, General Agricultural and Biological Sciences, environment, Harvesting yields, 570, Life-historychange, Fisheries, [SDV.EE]Life Sciences [q-bio]/Ecology, [SDV.BID.EVO] Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], FOS: Mathematics, Animals, Humans, Selection, Genetic, Agroecology and Sustainable Agriculture, Biology, Population Density, Paleontology, Eco-evolutionaryfeedback loops, Computer science, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Mathematics
Artificial intelligence, Adaptive landscapes, [SDV]Life Sciences [q-bio], Natural selection, Trait, Evolutionary biology, Plant Science, Agricultural and Biological Sciences, Selection (genetic algorithm), Natural (archaeology), Cannibalism, Body Size, Global change, [SDV.BID.EVO]Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], Statistics, Fishes, Life Sciences, Body size, Dynamic Modeling of Plant Form and Growth, Programming language, [SDV] Life Sciences [q-bio], [SDV.EE] Life Sciences [q-bio]/Ecology, environment, Phenotype, Energy allocation rules, [SDE]Environmental Sciences, Asymmetric competition, General Agricultural and Biological Sciences, environment, Harvesting yields, 570, Life-historychange, Fisheries, [SDV.EE]Life Sciences [q-bio]/Ecology, [SDV.BID.EVO] Life Sciences [q-bio]/Biodiversity/Populations and Evolution [q-bio.PE], FOS: Mathematics, Animals, Humans, Selection, Genetic, Agroecology and Sustainable Agriculture, Biology, Population Density, Paleontology, Eco-evolutionaryfeedback loops, Computer science, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Mathematics
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