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The role of maternal age and context-dependent maternal effects in the offspring provisioning of a long-lived marine teleost
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2018
Source: Royal Society Open Science, 5(1), 1-11
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Journal Title:Royal Society Open Science
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Description:Despite evidence of maternal age effects in a number of teleost species, there have been challenges to the assertion that maternal age intrinsically influences offspring quality. From an evolutionary perspective, maternal age effects result in young females paradoxically investing in less fit offspring despite a greater potential fitness benefit that might be gained by allocating this energy to individual somatic growth. Although a narrow range of conditions could lead to a maternal fitness benefit via the production of lower quality offspring, evolutionary theorists suggest these conditions are seldom met and that the reported maternal age effects are more likely products of the environmental context. Our goal was to determine if maternal effects operated on offspring provisioning in a long-lived rockfish (genus Sebastes), and to evaluate any such effects as an intrinsic function of maternal age or a context-dependent effect of the offspring release environment. We found that offspring provisioning is a function of both maternal age and the timing of offspring release; older females exhibit increased provisioning over younger females throughout the spawning season despite a decrease in provisioning across all maternal ages as the season progresses. These findings suggest a role for both maternal age effects and a potential context-dependent maternal effect in population productivity, carrying important implications when modelling population persistence and resilience.
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Source:Royal Society Open Science, 5(1), 1-11
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Pubmed ID:29410808
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Rights Information:CC BY
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Compliance:PMC
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Main Document Checksum:urn:sha256:0110fbd6d0945b159a09b03550f750d3be3e3188c22f4d78be57a3672dbcf7c3
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