6 resultados para Hennequin, Emile, 1858-1888
em SAPIENTIA - Universidade do Algarve - Portugal
Resumo:
Dissertação mest., Biologia Marinha, Universidade do Algarve, 2008
Resumo:
Dissertação de mest., Biologia Marinha, Faculdade de Ciências do Mar e Ambiente, Univ. do Algarve, 2008
Resumo:
Dissertação de mest., Biologia Marinha, Faculdade de Ciências do Mar e do Ambiente, Univ. do Algarve, 2010
Resumo:
Dissertação de mest. em Aquacultura e Pescas, Faculdade de Ciências do Mar e do Ambiente, Univ. do Algarve, 2006
Resumo:
The Atlantic sawtail catshark, Galeus atlanticus, has long been synonymous with the blackmouth catshark, Galeus melastomus, until the validity of G. atlanticus was resurrected by Muñoz-Chapuli and Ortega (1985). Despite this resurrection, the two species are still often confused because of their close resemblance. Consequently, field characters are proposed to distinguish the two sibling species. In particular, the internal colour of the labial furrows is easily observable on fresh specimens and also on preserved ones in museum collections, since it is blackish in G. atlanticus as opposed to white in G. melastomus. The two Atlanto-Mediterranean species are also compared to the West-African species G. polli.
Resumo:
The feeding habits of two major species of sole, the common sole Solea vulgaris Quensel, 1806 and the Senegalese sole Solea senegalensis Kaup, 1858 were studied in the lower estuary of the Guadiana River (Algarve, southern Portugal). An evaluation of the number, weight, and feeding coefficient of prey types showed that S. vulgaris feed on a limited variety of prey (only Polychaeta and Tanaidacea) and present low-intensity feeding activity, with small differences in diet between seasons. S. senegalensis also have a low-diversity diet (with only one more taxa, Amphipoda), but exhibit more intense feeding activity which varies seasonally, although with little seasonal variation in the relative importance of the main preys. The diet composition of these two species suggests feeding specialization.