Relationship between energy allocation and reproductive strategy in Trisopterus luscus

Proximate composition and energy content in Trisopterus luscus have been studied to address energy allocation strategy. Energy reserves in pouting females are mainly associated with lipids stored in the liver. Water content appeared to be a useful index in order to obtain very accurate predictions o...

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Bibliographic Details
Published in:Journal of experimental marine biology and ecology 2012-04, Vol.416-417, p.8-16
Main Authors: Alonso-Fernández, Alexandre, Saborido-Rey, Fran
Format: Article
Language:English
Subjects:
Condition index
Energy allocation
Fish reproduction
Marine
Proximate composition
Trisopterus luscus
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Summary:Proximate composition and energy content in Trisopterus luscus have been studied to address energy allocation strategy. Energy reserves in pouting females are mainly associated with lipids stored in the liver. Water content appeared to be a useful index in order to obtain very accurate predictions of energy density, particularly for ovaries and liver. Condition indices, HSI and K, are suitable to analyze nutritional status of fish, since they reflect changes in energy content and proximate composition in the different tissues studied. The seasonality of energy reserves was detected and is closely related to the sexual cycle, indicating that females pouting display a period of energy storage, mainly through lipid deposition in the liver. Therefore, T. luscus should be considered a capital rather than an income breeder, as the energy for reproduction comes essentially from stored energy. ► Water content and energy are inversely related in tissues of Trisopterus luscus. ► Energy reserves in T. luscus females are mainly associated to lipids in liver. ► HSI has been detected as the best index to analyze nutritional status in pouting. ► Seasonality of energy reserves was clearly detected closely linked to sexual cycle. ► Fuel for reproduction comes essentially from stored energy.
ISSN:0022-0981
1879-1697
DOI:10.1016/j.jembe.2012.02.001