IBBEA   24401
INSTITUTO DE BIODIVERSIDAD Y BIOLOGIA EXPERIMENTAL Y APLICADA
Unidad Ejecutora - UE
artículos
Título:
Southern King Crab larval survival: From intra and inter-female variations to a fishery-induced mortality
Autor/es:
SOTELANO, M. PAULA; LOVRICH, GUSTAVO A.; SACRISTÁN, HERNÁN J.; GOWLAND-SAINZ, MARÍA; DI SALVATORE, PABLO; TAPELLA, FEDERICO
Revista:
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES
Editorial:
NATL RESEARCH COUNCIL CANADA-N R C RESEARCH PRESS
Referencias:
Lugar: Otawa; Año: 2020 vol. 77 p. 1893 - 1903
ISSN:
0706-652X
Resumen:
The Southern King Crab Lithodes santolla supports one of the most important fisheries in southern South America. Lecithotrophic larvae hatch over an extended period, in which brooding females can be fished, but must be discarded due to regulations. Larval mortality by female fishing was evaluated. Samples of newly hatched zoea I were obtained the day before (control) and after female treatment (aerial-exposure or aerial-exposure + free fall). Independently of the mothers? treatment, larvae survived less than those from the control, explained by the air-exposure effects. The intra-clutch variability in larval survival and their variability in energetic reserves were studied. Females were maintained during the hatching period, and zoea I samples were taken during three successive days. We found high variation in larval survival within a single egg-clutch and between different females, only ascribable to the initial larval glycogen content. The intra-clutch variability in larval survival combined with extended hatching may be an adaptation that allows mothers to find an adequate substrate as larvae hatch and may constitute a diversified bet-hedging strategy.