CADIC   02618
CENTRO AUSTRAL DE INVESTIGACIONES CIENTIFICAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Massive production of Southern king crab juveniles: an alternative for the stock enhancement
Autor/es:
TAPELLA, FEDERICO; SOTELANO, M.PAULA; CAROLINA ROMERO; GUSTAVO ALEJANDRO LOVRICH
Lugar:
Gramados, Brasil
Reunión:
Congreso; V Congresso Brasileiro sobre Crustaceos; 2008
Institución organizadora:
Sociedade Brasileira de Carcinologia
Resumen:
<!-- /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} @page Section1 {size:612.0pt 792.0pt; margin:70.85pt 3.0cm 70.85pt 3.0cm; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> Since the Southern King Crab (SKC) fishery in the Beagle Channel has reached its maximum yield, landings began to decline until the fishery collapsed. Afterward, restrictions were imposed and areas with different fishing efforts were determined. However, nowadays after 14 y of restrictions there are no evidences of stock improvement. Thus, an alternative to enhance the SKC population may be the massive production of juveniles to subsidize the natural population. The aim of this work was to determine larval survival at three densities (300, 600 and 1200 larvae•container-1) in two systems: 1) a recirculation system with constant flowing water and 2) a cold room with frequent water change  (thrice a week). Water at both systems was filtered to 20µm, UV-sterilized and kept at 8ºC. Each density was quadruplicated and dead larvae were removed thrice a week. Survival was calculated until the 50% of larvae reached Crab I stage. SKC larval culture was more efficient in the recirculation system than in the cold room. In the recirculation system, survivals were similar among densities (p=0.26) and varied between 47±2 and 41±7% at low and high densities, respectively. In contrast, survival at the cold room was similar (p=0.38) between low (41±8%) and medium (34±6%) densities, but lower (p<<0.05) at high density (3±4%). Techniques here provided are useful either for planning a hatchery in a stock enhancement program or to produce large numbers of C1, which could be used for laboratory experiments.