Variación estacional de la ictiofauna del interior del Golfo de Nicoya, Costa Rica
Fecha
1997
Autores
Protti, Maurizio
Víquez, Rigoberto
Palacios, José
Soto, Rosa
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Editor
Universidad Nacional (Costa Rica)
Resumen
Muestras de peces recolectados al menos una vez al mes (1990-1991) con una red de enmalle, en el interior del Golfo de Nicoya, Costa Rica, revelaron que la comunidad ictiológica está dominada por cuatro familias: Sciaenidae (27,6% de la riqueza de especies), Haemulidae (15,0%), Carangidae (11,5%) y Ariidae (8,1%). Las especies Ilisha furthii (11,5% de la abundancia), Cetengraulis mysticetus (8,5%) y Cynoscion squamipinnis (8,3%) representaron el 28,3% de los 1491 ejemplares capturados. El 28,9% del peso total de captura (437 148,30 g) lo aportaron C. squamipinnis (11,1%), Pomadasys leuciscus (9,2%) y Cynoscion phoxocephalus (8,6%). C. squamipinnis y C. phoxocephalus fueron las únicas especies presentes, con al menos 10 individuos por estación, en todos los muestreos. En general, a diferencia de I. furthii que registró capturas estacionales relativamente constantes, las otras especies presentaron fluctuaciones discontinuas anuales y estacionales en el número de individuos y pesos promedios por muestreo. Esta variabilidad lleva a plantear que no existe un patrón identificable que relacione la abundancia con las estaciones del año.
Fish samples collected at least once a month in the Nicoya Gulf, Costa Rica, using a gill net, revealed that the ichthyological community is dominated by four families: Sciaenidae (27.6% of the species), Haemulidae (15.0%), Carangidae (11.5%) and Ariidae (8.1%). Out of 1,491 fishes collected, 28.3% were represented by the species Ilisha furthii (11.5%), Cetengraulis mysticetus (8.5%) and Cynoscion squamipinnis (8.3%). A 28.9% of the total captured weight (437,148.30 g) is given by C. squamipinnis (11.1%), Pomadasys leuciscus (9.2%) and Cynoscion phoxocephalus (8.57%). I furthii, C. squamipinnis and C. phoxocephalus were the only species, with at least 10 individuals per season, present in all samples. In contrast with I. furthii, which recorded relatively constant seasonal captures, the rest of the species showed random yearly and seasonal fluctuations in both number of individuals and average weight per sample. These non-systematic variations suggest that there is no identifiable pattern that relates the abundance to seasons.
Fish samples collected at least once a month in the Nicoya Gulf, Costa Rica, using a gill net, revealed that the ichthyological community is dominated by four families: Sciaenidae (27.6% of the species), Haemulidae (15.0%), Carangidae (11.5%) and Ariidae (8.1%). Out of 1,491 fishes collected, 28.3% were represented by the species Ilisha furthii (11.5%), Cetengraulis mysticetus (8.5%) and Cynoscion squamipinnis (8.3%). A 28.9% of the total captured weight (437,148.30 g) is given by C. squamipinnis (11.1%), Pomadasys leuciscus (9.2%) and Cynoscion phoxocephalus (8.57%). I furthii, C. squamipinnis and C. phoxocephalus were the only species, with at least 10 individuals per season, present in all samples. In contrast with I. furthii, which recorded relatively constant seasonal captures, the rest of the species showed random yearly and seasonal fluctuations in both number of individuals and average weight per sample. These non-systematic variations suggest that there is no identifiable pattern that relates the abundance to seasons.
Descripción
Palabras clave
ICTIOFAUNA, GOLFO DE NICOYA, COSTA RICA, VARIACIÓN, ESTACIONAL, VARIATION, SEASONAL