Feeding habits and population aspects of the spotted goatfish, Pseudupeneus maculatus (Perciformes: Mullidae), on the continental shelf of northeast Brazil

Other titles Hábitos alimenticios y aspectos poblacionales del salmonete manchado, Pseudupeneus maculatus (Perciformes: Mullidae) sobre la plataforma continental del noreste de Brasil
Type Article
Date 2020-06
Language English
Author(s) Soares Andrey1, Souza Lira Alex1, 2, Guazzelli Gonzalez Julio1, Nolé Eduardo Leandro1, 4, Lucena-Frédou Flavia1, Le Loch Francois2, Padovani Ferreira Beatrice3, Fredou Thierry1
Affiliation(s) 1 : Universidade Federal Rural de Pernambuco, Departamento de Pesca e Aquicultura, 52171-900, Recife, Brazil
2 : IRD, Univ Brest, CNRS, Ifremer, LEMAR, IUEM, F-29280 Plouzane, France
3 : Universidade Federal de Pernambuco, Departamento de Oceanografia, 50670-901, Recife, Brazil.
4 : Institut de Recherche pour le Développement (IRD), MARBEC (Université Montpellier, CNRS, Ifremer, IRD), Sète, France.
Source Scientia Marina (0214-8358) (Departmento de Publicaciones del CSIC), 2020-06 , Vol. 84 , N. 2 , P. 119-131
DOI 10.3989/scimar.04958.24A
Note Mediterranean demersal resources and ecosystems: 25 years of MEDITS trawl surveys M.T. Spedicato, G. Tserpes, B. Mérigot and E. Massutí (eds)
Keyword(s) distribution patterns, stomach content analysis, Brazil, cross-shelf, stable isotopes
Abstract

This study provides information about the feeding habits, population aspects and spatial distribution of the spotted goatfish, Pseudupeneus maculatus, along the coast of the tropical Brazilian continental shelf. Distribution patterns are described using length frequencies and catch rates. Stable isotope ratios of carbon (δ13C) and nitrogen (δ15N), along with stomach contents, were analysed to determine the diet of the spotted goatfish. Multivariate analysis and numerical indicators of the diet, such as numerical frequency, frequency of occurrence and weight percentage, were computed to evaluate the diet composition. The mean trophic position was defined using both stable isotope ratios and stomach content analysis. The length at first maturity for the species was determined as 13.7 cm. A slight pattern in size distribution was observed, with mean size increasing with depth along the shelf. The diet was mainly composed of crustaceans, teleosts and Polychaeta. No clear dietary difference was found between habitat types, water depth or latitude. Both trophic positions estimated by stable isotopes and stomach contents analysis ranged between levels 3 and 4. P. maculatus was found to be feeding on many rare and infrequent prey items, classifying it as a generalist zoobenthivorous predator, probably due to its efficient search strategy.

Abstract <p>En este estudio se analizaron los h&aacute;bitos alimenticios y aspectos biol&oacute;gicos del salmonete manchado (Pseudupeneus maculatus) frente a la costa brasile&ntilde;a. Para describir los patrones de distribuci&oacute;n se analiz&oacute; la estructura de tallas y las tasas de captura. El nivel tr&oacute;fico y la dieta alimenticia se determinaron mediante an&aacute;lisis isot&oacute;picos de carbono (&delta;13C) y nitr&oacute;geno (&delta;15N), adem&aacute;s del contenido estomacal. La composici&oacute;n de la dieta fue determinada con an&aacute;lisis multivariados e indicadores num&eacute;ricos, como la frecuencia num&eacute;rica, frecuencia de ocurrencia y el porcentaje del peso. Los resultados indicaron que la talla de primera madurez se encuentra en 13.7 cm. Se observ&oacute; que la talla media increment&oacute; en relaci&oacute;n con el fondo. Por otro lado, la dieta estuvo compuesta por crust&aacute;ceos, tele&oacute;steos y poliquetos, asimismo no se evidenciaron diferencias significativas por tipo de h&aacute;bitats, profundidad y grado de latitud. Los niveles tr&oacute;ficos estimados oscilaron entre 3 y 4, determin&aacute;ndose que P. maculatus se aliment&oacute; de diversas presas, probablemente debido a su eficiente estrategia de b&uacute;squeda, clasific&aacute;ndose como depredador zoobent&iacute;voro generalista.</p>
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Soares Andrey, Souza Lira Alex, Guazzelli Gonzalez Julio, Nolé Eduardo Leandro, Lucena-Frédou Flavia, Le Loch Francois, Padovani Ferreira Beatrice, Fredou Thierry (2020). Feeding habits and population aspects of the spotted goatfish, Pseudupeneus maculatus (Perciformes: Mullidae), on the continental shelf of northeast Brazil. Scientia Marina, 84(2), 119-131. Publisher's official version : https://doi.org/10.3989/scimar.04958.24A , Open Access version : https://archimer.ifremer.fr/doc/00628/74046/