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Campaña de prospección pesquera en la plataforma continental del Pacífico de Costa Rica (noviembre 1977, enero 1978)

Otros títulosGroundfish survey in the Pacific coastal shelf of Costa Rica
AutorFuertes-Gamundi, José R. ; Araya, Hubert
Fecha de publicación1979
EditorConsejo Superior de Investigaciones Científicas (España)
CitaciónInformes Técnicos del Instituto de Investigaciones Pesqueras 69: 1-31 (1979)
ResumenDuring the months of November, December 1977 and January 1978 a Groundfish survey was carried out in the Pacific waters of Costa Rica in order to asses the demersal resources of this area. The vessel used was a Spanish commercial stern trawler, which was capable of using different types of trawls; semipelagic, pelagic, bottom and shrimp. A total of 77 hauls were carried out, distributed all along the coastal shelf, in depths between 40 and 540 meters. The bottoms in most of the region were found to be irregular, with predominance of hard bottoms, coraline and volcanic, not very suitable for bottom trawling. A caractheristic of the area is a high diversity of the species, a total of 150 different species were found. Catches, in general, were not abundant. Only red snapper (Lutjanus jordani) gave commercial yields in some of the catches. All other commercial species appeared in very small quantities. Red snapper main concentration area was located on a 250 square miles zone, next to Nicoya Gulf and South of Punta Judas, between 6 and 17 miles off the coast and in depths between 40 and 200 meters. The length of red snapper captured was in the range of 20- 61 cm with the most frequent lengths varying between 35 and 50 cm. The total catch of red snapper was 36.885 kg with a mean catch per hour hanled of 153.7 kg. Mean catch per effective day fished was 1.118 kg and the mean catch per mile hauled was 49.6 kg. The total biomass for red snapper in the area South of Punta Judas was calculated to be between 1.306 and 1.860 metric tons, using the areal expansion method, thus, those values are minimum estimates. According to this, the Maximum Sustainable Yield, on an annual basis, that could be achiered for this population has been calculated to be between 150 and 200 metric tons.
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