Hábitos alimentarios de dos peces pelágicos Thunnus albacares y Acanthocybium solandri de la Reserva Marina de Galápagos

Estructura trófica de la asociación de peces intermareales de la costa rocosa del norte de Chile

The trophic relationships of 13 intertidal fish species collected in northern Chile (20°18’S and 20°54’S) from July 1997 to July 1998, the stomach content analysis of 820 specimens, were investigated. The importance of the prey items was assessed by means of gravimetric and frequency of ocurrence methods, together with the Shannon-Wiener (trophic diversity) and Pianka (trophic overlap) indexes....

Hirudinella Ventricosa (trematoda) Parasitizing Makaira Nigricans and Acanthocybium Solandri from Neotropical Region, Brazil Hirudinella Ventricosa (trematoda) Parasitando Makaira Nigricans Y Acanthocybium Solandri De La Región Neotropical, Brasil

In January 2002, were caught 11 Makaira nigricans Lacepède, 1802 (Istiophoridae) and two Acanthocybium solandri (Cuvier, 1832) (Scombridae) off Cabo Frio municipality, Rio de Janeiro State, Brazil. We collected digenetic trematodes from the stomach of some of these fishes. We studied these trematodes with optical and scanning electron microscopy and identified them as Hirudinella ventricosa (Pa...

Description de Hyalomma dromedarii (Koch 1844) Morphologie de la larve et de la nymphe

Les rongeurs de la region de Tehran

Escala de Reserva Cognitiva y envejecimiento

The construct of cognitive reserve attempts to explain why some individuals with brain impairment, and some people during normal ageing, can solve cognitive tasks better than expected. This study aimed to estimate cognitive reserve in a healthy sample of people aged 65 years and over, with special attention to its influence on cognitive performance. For this purpose, it used the Cognitive Reser...