Crecimiento del cangrejo Callinectes danae (Decapoda: Portunidae) de la Isla de Margarita, Venezuela

Juvenile development of Callinectes danae Smith, 1869 (Crustacea, Decapoda, Brachyura, Portunidae) under laboratory conditions.

The juvenile development of Callinectes danae was investigated from megalopae obtained in neuston samples at Ubatuba, São Paulo, Brazil. The individuals were raised in the laboratory under constant temperature (25 ± 1°C), filtered sea water from the collection location (35‰), and natural photoperiod. Newly hatched Artemia sp. nauplii were offered as food on a daily basis and ornamental-fish foo...

Estimación del Coste de la Calidad del Software a través de la Simulación del Proceso de Desarrollo

Some of the main objectives of quality assurance practices are to detect and correct the errors that arise during the development of a software product, as well as to guarantee that the final product conforms to the client’s requirements. Quality initiatives suppose an added cost to the software development projects, cost that is totally justified but which, in most of the cases, is the first o...

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....

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

Etude sur la digestion pancratique de la caseine pour la production de la toxine tetanique