CADIC   02618
CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Ammonium metabolic response to emersion in Panulirus interruptus
Autor/es:
M. CAROLINA ROMERO; LUCÍA OCAMPO
Lugar:
Gramado, Brasil
Reunión:
Congreso; V Congresso Brasileiro sobre Crustaceos; 2008
Resumen:
The red spine lobster Panulirus interruptus supports a valuable commercial and sport fishery at the Pacific shore of Mexico. After they are caught, animals are distributed to markets at dryness conditions and survive for several hours. However, during this emersion periods the ammonium can not be expelled by gills. The aim of this study was to analyze nitrogen metabolism of P. interruptus females during emersion at two different temperatures previously to emersion. A total of 150 lobsters of 570 ±78 g were kept in two tanks of 1000 l at 20 and 26ºC, respectively. Groups of 15 animals were exposed at different emersion periods (0 h as control, 3, 6, 12 and 24 h) in boxes simulating practices of commercial shipment. Haemolymph samples were taken from the cardiac sinus via and ammonium content was analyzed by the flow injection method. Total ammonium content was related with emersion time and temperature. Ammonium concentration increased significantly with the emersion periods and was higher in those females kept at 26ºC, except for the control group which showed similar concentrations. After 24 h of emersion, total ammonium increased between 8 and 11 times, for females from 20 and 26ºC, respectively. Thus, total ammonium content is an important factor to consider during lobster commerce since it affects animals quality. This work was supported by CONICET and CIBNOR.