Raúl Cruz

LARGE SCALE ASSESSMENT OF RECRUITMENT FOR THE SPINY LOBSTER, PANULIRUS ARGUS, AQUACULTURE INDUSTRY

[Investigations to study the long and complex larval cycle of the spiny lobster, Panulirus argus in artificial shelters, on the barrier reef and in sea grass meadows, became efficient programs for catching large numbers of pueruli and juveniles at some locations of the Cuban archipelago. These data support a study to obtain a better understanding of the recruitment variability, of the mortality rates during the juvenile phase, and to evaluate the potential alternative for growout of pueruli and juveniles to marketable sizes. The intensity of larval recruitment is much higher in the area close to the edge of the shelf (32.2 pueruli/collector) and diminishes toward the shallow coastal waters (1.2 pueruli/collector). The total cost to collect 1,116 pueruli was around US

Regional and seasonal prediction of the Caribbean lobster ( Panulirus argus ) commercial catch in Cuba

1656 (US

Gregarious behaviour of juveniles of the spiny lobster, panulirus argus (Latreille, 1804) in artificial shelters

1.50/puerulus), and 400 juveniles require around US

Variability in recruitment of multiple life stages of the Caribbean spiny lobster, Panulirus argus, in the Gulf of Batabanó, Cuba

1697 (US

Evaluation of practical diets for the Caribbean spiny lobster Panulirus argus (Latreille, 1804): effects of protein sources on substrate metabolism and digestive proteases

4.14/juvenile) in five days. In the seaweed collectors, there is an absence of predators and diseases, a good level of food (a high variety of invertebrates, fish eggs and fish larvae, Foraminifera, and filamentous algae), and a gregarious behaviour in a structurally complex tassel may increase individual growth rates. The natural mortality rate in the juvenile nursery area has been estimated at 0.42 year −1 , so that 58% was estimated to survive and be recruited to the fishery. The results of our studies indicate that juvenile removals from the wild have a negative impact on pre-recruits and subsequent catches. Improvement of the techniques to collect pueruli is needed to catch a large number of these, because the current objective of the program in Cuba is to measure puerulus recruitment and to predict catches. Any strategy of commercial investment for the growout of pueruli and post-pueruli to marketable sizes requires accurate seasonal catch-and-effort data, and knowledge of the population parameters, all needed to assist in preventing overfishing. Las investigaciones para estudiar el largo y complejo ciclo larval de la langosta Panulirus argus en refugios artificiales, en la barrera de arrecifes y el seibadal marino, se convirtieron en programas eficaces para capturar un elevado numero de puerulos y juveniles en algunas localidades del archipielago cubano. Estos datos apoyan el estudio para lograr una mejor compresion de la variabilidad del reclutamiento, las tasas de mortalidad durante la fase juvenil, y para evaluar el potencial alternativo de engorde de puerulus y juveniles a las tallas comerciales. La intensidad del reclutamiento larval es mucho mayor en el area cercana al borde de la plataforma (32,2 puerulos/colector) y disminuye hacia la costa en aguas someras (1,2 puerulos/colector). El costo total para colectar en cinco dias 1.116 puerulos es de alrededor de 1656 US

Prediction of Commercial Catches of the Spiny Lobster Panulirus Argus in the Gulf of Batabano, Cuba

(1,50/puerulo US

Dinámica reproductiva de la langosta (Panulirus argus) en el Archipielago cubano

) y 400 juveniles es de 1697 US

Reclutamiento de puerulos de langosta (Panulirus argus) a la plataforma cubana

(4,14/juvenil US

Catchability for the Main Fishing Methods in the Cuban Fishery of the Spiny Lobster Panulirus Argus (Latreille, 1804), and Implications for Management (Decapoda, Palinuridea)

). En los colectores hay ausencia de enfermedades y depredadores, buen nivel de alimentacion (invertebrados, huevos y larvas de peces, foraminiferos, algas filamentosas), y la conducta gregaria en una borla o conjunto de hebras, de estructura compleja, puede aumentar la tasa de crecimiento individual. La mortalidad natural en el area de cria de los juveniles se ha estimado en 42%, por lo que un 58% sobrevive y se recluta a la pesqueria. Los resultados de nuestros estudios indican que la extraccion de juveniles del medio natural tiene un impacto negativo sobre los pre-reclutas y las capturas posteriores. Se necesita mejorar la tecnica para colectar un numero significativo de puerulos, ya que el objetivo del programa en Cuba es medir el reclutamiento y predecir las capturas. Cualquier estrategia de inversion para el crecimiento de puerulos y post-puerulos hasta tamano comercial, requiere de datos de captura-yesfuerzo estacionales y el conocimiento de los parametros poblacionales para prevenir la sobrepesca. , Investigations to study the long and complex larval cycle of the spiny lobster, Panulirus argus in artificial shelters, on the barrier reef and in sea grass meadows, became efficient programs for catching large numbers of pueruli and juveniles at some locations of the Cuban archipelago. These data support a study to obtain a better understanding of the recruitment variability, of the mortality rates during the juvenile phase, and to evaluate the potential alternative for growout of pueruli and juveniles to marketable sizes. The intensity of larval recruitment is much higher in the area close to the edge of the shelf (32.2 pueruli/collector) and diminishes toward the shallow coastal waters (1.2 pueruli/collector). The total cost to collect 1,116 pueruli was around US

PESCA ARTESANAL DE BIVALVOS (Anadara tuberculosa y A. similis) Y SU RELACIÓN CON EVENTOS AMBIENTALES. PACÍFICO COLOMBIANO.

1656 (US