Harengula Clupeola Research Articles

Estudo comparativo e variação sazonal da ictiofauna na zona entremarés do Mar Casado-Guarujá e Mar Pequeno-São Vicente, SP

Through a monthly beach seine survey programme carried out in the coastal beach of Mar Casado (Guaruja-SP) and in the estuarine beach of Mar Pequeno (Sao Vicente-SP), from May, 1984 to May, 1985, it was yielded a total of 5723 individuals of 42 species of marine and estuarine fish. A list of species, seasonal occurrence and relative abundances is presented. For each area, we found only five dominant species as: in Mar Casado, Trachinotus carolinus and T. falctus (Carangidae), juveniles of Mugilidae, Harengula clupeola (Clupeidae) and Eucinostmus melanopterus (Gerreidae); in Mar Pequeno, juveniles of Mugilidae, Xenomelaniris brasilienses (Atherinidae), Opisthonema oglinum and Harengula clupeola (Clupeidae). In Mar Pequeno we found the greatest richness of species, the highest values of individuals's number, and CPUE, apparently related with water's temperature that are lower in winter and higher in summer-fall. The Shannon-Weaver Index was calculated to determine the diversity of ichthyofauna; it varies seasonally and seems not to be related with any hydrological parameters.

Gill net selectivity and catch rates of coastal pelagic fish in Jamaica

The selectivity characteristics of gill nets for small coastal pelagic fish were investigated in Kingston harbour, Jamaica. Three clupeid species, Harengula humeralis, Harengula clupeola and Opisthonema oglinum and one carangid species, Chloroscombrus chrysurus, common throughout the Gulf and Caribbean were regularly caught during the survery and the following length-mesh selection relationships were obtained for three of these: lm=6·60+1·21 θ (H. humeralis), lm=7·1+1·34θ (O. olignum) and lm=7·42+1·11 θ (C. chrysurus) where lm=mean selection length and θ=mesh size in cm. Catch rates of the four species by various sized meshes indicated that the most efficient meshes were those currently being used in the Jamaican commercial fishery.