Trophic Ecology and Ecomorphology of the Shorthead Drum, Larimus breviceps (Acanthuriformes: Sciaenidae), from the Northeastern Brazil
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Lucas V. Santos [3] ; Jonas Eloi de Vasconcelos-Filho [1] ; Alex Souza Lira [2] ; Andrey Soares [2] ; Leandro Nolé Eduardo [2] ; Rafaela Passarone [2] ; François Le-Loch [4] ; Flávia Lucena-Frédou [2]
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[1] Universidade Federal de Pernambuco
Universidade Federal de Pernambuco
Brasil
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[2] Universidade Federal Rural de Pernambuco
Universidade Federal Rural de Pernambuco
Brasil
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[3] Universidade Federal Do Rio Grande
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[4] Univ. Brest
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- Localización: Thalassas: An international journal of marine sciences, ISSN 0212-5919, Vol. 38, Nº. 1, 2022, págs. 1-11
- Idioma: inglés
- Texto completo no disponible (Saber más ...)
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Resumen
The shorthead drum Larimus breviceps has an important role in the subsistence of local communities. However, studies addressing the trophic ecology of this species are still scarce. Here we present further information on the trophic ecology and ecomorphology of L. breviceps, including dietary analyses, carbon and nitrogen stable isotopes compositions (δ13C and δ15N), and morphometric measurements on a seasonal basis. Specimens were captured in the Northeastern Brazil from February to November 2017 by the local artisanal shrimp fsheries. A total of 46 individuals (27 juveniles and 19 adults) were randomly subsampled for ecomorphological analysis. Signifcant diferences in the ecological attributes between ontogeny were found for peduncle and body fatness indexes. A total of 479 stomachs of L. breviceps were analyzed. The fsh total length ranged from 6.3 to 19.2 cm. Nine prey categories were defned for L. breviceps. Sergestidae shrimps were the main prey. The diet composition from the multivariate technique of non-metric multidimensional scaling ordination displayed a diferent pattern for juveniles and adults. A subsample of 40 individuals (dry season=20; rainy season=20) were selected for stable isotope analysis. Mean values of δ13C and δ15N were diferent by size in the dry season. This information improves the general knowledge and ecological data on bycatch species, as well as may give support to management initiatives, potentially associated to trophic models, or may be considered into the design of Bycatch Reduction Devices (BRD), taking into account the current paradigm of the Ecosystemic Approach to Fishery (EFA).
