Vista normal Vista MARC

Artificial shelters for spiny lobster Panulirus argus (Latreille): an evaluation of occupancy in different benthic habitats

Sosa Cordero, Eloy | Arce Ibarra, Ana Minerva [autora] | Aguilar Dávila, William [autor] | Ramírez González, Alma Angélica [autora].
Tipo de material: Artículo impreso(a) y electrónico Artículo impreso(a) y electrónico Tipo de contenido: Texto Tipo de medio: Computadora Tipo de portador: Recurso en líneaTema(s): Langosta espinosa | Población animal | Hábitat (Ecología)Descriptor(es) geográficos: Yucatán (Península) (México) Clasificación: AR/595.384097267 / A7 Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Journal of Experimental Marine Biology and Ecology. Volumen 229, número 1 (October 1998), páginas 1-18. --ISSN: 0022-0981Número de sistema: 44345Resumen:
Inglés

In spiny lobster, Panulirus argus (Latreile), fisheries in Cuba, Mexico and the Bahamas, artificial shelters (casitas) are successfully used as fishing gears. However, the mechanisms underlying the operation of these artificial shelters and their long-term effects on the resource and benthic communities are unclear. Lowered predation-induced mortality due to casitas has led to the proposal that they be placed in benthic habitats with adequate food, but where natural shelter is lacking. In this study, firstly the availability of natural habitat types was measured and secondly, habitat features which could influence the occupancy of artificial shelters by lobsters were evaluated. Casitas were placed in benthic habitats differing in the relative availability of seagrass and hard bottom. Spiny lobsters and faunal assemblages were monitored from December 1993 to July 1994 at six stations, two for each benthic habitat type. The study area was a typical spiny-lobster nursery area, with bottom cover dominated by seagrass and macroalgae (79.7%); while hard bottom, including patch reef, amounted to only 0.2%. Hence, a population bottleneck probably occurred, negatively affecting postalgal juveniles and subadult lobsters. The results suggest that seagrass availability was the key factor determining casitas' occupancy by lobsters. The lowest occupancy was found where seagrass was scarce and hard bottom was available. Given seagrass availability, casitas harbored a similar number of lobsters irrespective of the hard bottom availability; allowing to infer that artificial shelters provided critical habitats (refuges) for postalgal and subadult lobsters. The mean size of lobsters did not vary among stations, and commercial-sized lobsters were scarce. An index of predator presence showed a significant variation among stations and with time, with higher values from April to June. Sea temperature was positively correlated with lobster abundance and predator index; the latter two variables were not correlated. These study results support the use of casitas for the enhancement of preadult lobster populations.

Recurso en línea: https://doi.org/10.1016/S0022-0981(98)00037-9
Lista(s) en las que aparece este ítem: Ana Minerva Arce Ibarra | Alma Angélica Ramírez González
Etiquetas de esta biblioteca: No hay etiquetas de esta biblioteca para este título. Ingresar para agregar etiquetas.
Star ratings
    Valoración media: 0.0 (0 votos)
Existencias
Tipo de ítem Biblioteca actual Colección Signatura Info Vol Estado Fecha de vencimiento Código de barras
Artículos Biblioteca Chetumal

Texto en configuración de biblioteca Chetumal

Artículos (AR) 		ECOSUR AR 595.384097267 A7 001 Disponible ECO030004626
Artículos Biblioteca Electrónica
Recursos en línea (RE) 		ECOSUR Recurso digital ECO40044345796
Artículos Biblioteca San Cristóbal

Texto en la configuración de la biblioteca San Cristóbal

Artículos (AR) 		ECOSUR AR 595.384097267 A7 002 Disponible ECO010018121

Disponible para usuarios de ECOSUR con su clave de acceso

In spiny lobster, Panulirus argus (Latreile), fisheries in Cuba, Mexico and the Bahamas, artificial shelters (casitas) are successfully used as fishing gears. However, the mechanisms underlying the operation of these artificial shelters and their long-term effects on the resource and benthic communities are unclear. Lowered predation-induced mortality due to casitas has led to the proposal that they be placed in benthic habitats with adequate food, but where natural shelter is lacking. In this study, firstly the availability of natural habitat types was measured and secondly, habitat features which could influence the occupancy of artificial shelters by lobsters were evaluated. Casitas were placed in benthic habitats differing in the relative availability of seagrass and hard bottom. Spiny lobsters and faunal assemblages were monitored from December 1993 to July 1994 at six stations, two for each benthic habitat type. The study area was a typical spiny-lobster nursery area, with bottom cover dominated by seagrass and macroalgae (79.7%); while hard bottom, including patch reef, amounted to only 0.2%. Hence, a population bottleneck probably occurred, negatively affecting postalgal juveniles and subadult lobsters. The results suggest that seagrass availability was the key factor determining casitas' occupancy by lobsters. The lowest occupancy was found where seagrass was scarce and hard bottom was available. Given seagrass availability, casitas harbored a similar number of lobsters irrespective of the hard bottom availability; allowing to infer that artificial shelters provided critical habitats (refuges) for postalgal and subadult lobsters. The mean size of lobsters did not vary among stations, and commercial-sized lobsters were scarce. An index of predator presence showed a significant variation among stations and with time, with higher values from April to June. Sea temperature was positively correlated with lobster abundance and predator index; the latter two variables were not correlated. These study results support the use of casitas for the enhancement of preadult lobster populations. eng

Con tecnología Koha