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Título: | Temporal uncoupling between energy acquisition and allocation to reproduction in a herbivorous-detritivorous fish |
Autor: | Villamarín, Francisco Magnusson, William Ernest Jardine, Timothy D. Valdez, Dominic G. Woods, Ryan J. Bunn, Stuart |
Palavras-chave: | Carbon-13 Dna Nitrogen 15 Rna Stable Isotope Adult Animals Tissue Biosynthesis Body Constitution Body Growth Detritivore Dry Season Energy Consumption Energy Expenditure Energy Resource Energy Transfer Fish Gonad Development Herbivore Isotope Analysis Liza Alata Muscle Tissue Nonhuman Reproduction Season Seasonal Variation Species Habitat Tissue Distribution Tissue Metabolism Turnover Time Wet Season Animals Energy Metabolism Female Fish Herbivory Lipid Metabolism Male Obesity Physiology Adiposity Animalss Energy Metabolism Female Fishes Herbivory Lipid Metabolism Male Reproduction |
Data do documento: | 2016 |
Revista: | PLoS ONE |
É parte de: | Volume 11, Número 3 |
Abstract: | Although considerable knowledge has been gathered regarding the role of fish in cycling and translocation of nutrients across ecosystem boundaries, little information is available on how the energy obtained from different ecosystems is temporally allocated in fish bodies. Although in theory, limitations on energy budgets promote the existence of a trade-off between energy allocated to reproduction and somatic growth, this trade-off has rarely been found under natural conditions. Combining information on RNA:DNA ratios and carbon and nitrogen stable-isotope analyses we were able to achieve novel insights into the reproductive allocation of diamond mullet (Liza alata), a catadromous, widely distributed herbivorous-detritivorous fish. Although diamond mullet were in better condition during the wet season, most reproductive allocation occurred during the dry season when resources are limited and fish have poorer body condition. We found a strong trade-off between reproductive and somatic investment. Values of δ13C from reproductive and somatic tissues were correlated, probably because δ13C in food resources between dry and wet seasons do not differ markedly. On the other hand, data for δ15N showed that gonads are more correlated to muscle, a slow turnover tissue, suggesting long term synthesis of reproductive tissues. In combination, these lines of evidence suggest that L. alata is a capital breeder which shows temporal uncoupling of resource ingestion, energy storage and later allocation to reproduction. © 2016 Villamarín et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
DOI: | 10.1371/journal.pone.0150082 |
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