reproduction of the fish lutjanus analis (mutton snapper; perciformes: lutjanidae) from northeastern brazil
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2010
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Abstract
The mutton snapper Lutjanus analis is an overexploited species of economic importance for the Northeast region of Brazil. To determine the reproductive aspects of the mutton snapper, biological data were sampled from Bahia, Pernambuco, ParaĂba, Rio Grande do Norte and Ceará States, between 7 and 200m depth, from February 1997 to December 1999, performed in the Brazilian Economic Exclusive Zone Study Program (REVIZEE-NE Program). Data on total length (TL), fork length (FL), standard length (SL), total weight (TW) and gutted weight (GW) were measured. The gonads were collected and fixed in FAACC for histological analysis on maturational stage and calculation of the gonadosomatic index (GSI). A total of 135 fishes were collected; from these, 74 were females and 61 were males. Females were between 28.0 and 69.0cm (TL) and the males between 35.0 and 75.0cm (TL). Mutton snapper are gonochorists, and the spawning season, determined by the maturity stages frequency and the GSI, occurred between November and April, with peak spawning in March. The mature females’ minimum length was 28.0cm fork length, smaller than the minimum maturation length previously reported for the species in Cuba. The exploitation status of the species and the biological traits enhances the importance of establishing spatial and seasonal protection measures such as protected areas both in nursery and spawning sites. Rev. Biol. Trop. 58 (3): 791-800. Epub 2010 September 01.El pargo criollo Lutjanus analis es una especie de importancia econĂłmica para la regiĂłn noreste de Brasil, que esta siendo sobreexplotada. Para determinar sus aspectos reproductivos, se tomaron datos biolĂłgicos en los Estados de BahĂa, Pernambuco, ParaĂba, Rio Grande do Norte y Ceará, entre 7 y 200m de profundidad, de febrero 1997 a diciembre 1999, en el Programa de REVIZEE-NE en la Zona EconĂłmica Exclusiva de Brasil. Se midieron la longitud total (LT), longitud de horquilla (FL), longitud estándar (SL), el peso total (TW) y peso evicerado (GW). Las gĂłnadas se recolectaron y fijaron en FAACC para el análisis histolĂłgico de las etapas de maduraciĂłn y el cálculo del Ăndice gonadosomático (IGS). Se recolectaron un total de 135 hembras y 61 machos. Las hembras midieron 28.0-69.0cm (TL) y los machos entre 35.0-75.0cm (TL). Lutjanus analis es gonocorista, y la Ă©poca de desove, determinada por la frecuencia de las etapas de maduraciĂłn y el GSI, ocurre entre noviembre y abril, con con un pico de desove en marzo. La longitud mĂnima (FL) de las hembras maduras fue 28.0cm, menor que la reportada para la especie en Cuba. El estado de explotaciĂłn de las especies y los indicadores biolĂłgicos observados justifican el establecimiento de medidas de protecciĂłn espacial y temporal, como las áreas protegidas, tanto en sitios de crianza como en zonas de desove.
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Authors | ;Simone F Teixeira;Yalan F Duarte;Beatrice P Ferreira |
Journal | science journal of university of zakho |
Year | 2010 |
DOI | DOI not found |
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