José De La Cruz Agüero

Ictiofauna de la laguna de San Ignacio,Baja California Sur, México: nuevos registrosy ampliaciones de ámbito

The check-list of tishes from San Ignacio Lagoon, Baja California Sur (Mexico), is updated with the addition of 26 species. Eight species reported here extend their known distribution range. The systematic list includes 107 species of 89 genera, 54 families and 21 orders, and information about size range, number of specimens per species, catalogue number and zoogeographic affinities.

Length–weight relations of selected species of the family Gerreidae (Actinopterygii: Perciformes) from the mexican coas

In this study, parameters of the length -weight relation (LWR) were estimated for fifteen species of Gerreidae (mojarras) caught from the Pacific- and Atlantic coast of Mexico, including the Gulf of California. The Pacific species were: Diapterus aureolus , Diapterus brevirostris , Eucinostomus currani , Eucinostomus dowii , Eucinostomus entomelas , Eucinostomus gracilis , Eugerres axillaris , Eugerres lineatus , and Gerres cinereus. The Atlantic species were: Diapterus auratus , Eucinostomus argenteus , Eucinostomus gula , Eucinostomus jonesi , Eucinostomus melanopterus , and Eugerres plumieri . The values of the exponent b of the length -weight relation ranged from 2.58 to 3.79. To the best of our knowledge, these are the first parameter estimates for nine species for the Mexican coast and for four on a worldwide scale.

First Record of the Pacific Fanfish Pteraclis aesticola (Jordan and Snyder, 1901) in the Tropical Eastern Pacific

One specimen ofPteraclis aesticola was collected off San José del Cabo, Baja California Sur, México (22°54′N, 109°45′W), in March 2007. Present record is the first reported occurrence of the species in the Tropical Eastern Pacific biogeographic region (Gulf of California to southern Ecuadorian waters). Its large fan-like anal and dorsal fins and its counts of fin rays and vertebrae can distinguish the Pacific fanfish from the other species in the genus. This fish may have not yet been recorded in the region because its presence has been overlooked in the past because of rarity and lack of commercial value.