A phenotypic trade-off between previous growth and present fecundity in round sardinella <Emphasis Type="Italic">Sardinella aurita</Emphasis> |
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Authors: | Athanassios C Tsikliras Efthimia Antonopoulou Konstantinos I Stergiou |
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Institution: | (1) Department of Zoology, School of Biology, Aristotle University of Thessaloniki, UP Box 134, 541 24 Thessaloniki, Greece |
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Abstract: | The decision of how to allocate surplus energy to reproduction and growth can have important effects on fish population dynamics
as well as on other life history traits. The natural examples on the interrelationship between maternal growth and number
of offspring produced in fishes are scarce. We tested the hypothesis that these traits are competing for resources by estimating
maternal previous growth decisions, using back-calculation, and present reproduction, expressed as absolute fecundity, of
female round sardinella (Sardinella aurita) in the northeastern Mediterranean Sea. Despite the overall increasing trend of fecundity with age, individual fecundity
was negatively related to individual specific growth rate between the most recent annulus formation and spawning within ages.
A decreasing trend between previous growth rate and present fecundity emerged, showing that round sardinella allocate increasingly
less energy to growth with age and more into reproduction and that the previous growth decisions determine present fecundity. |
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Keywords: | Energy Reproduction Growth Life history Round sardinella |
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