Aspectos relevantes en la biología de Cetengraulis mysticetus (GÜNTHER) (Pisces: Engraulidae) en el Golfo de Nicoya, Costa Rica.
Fecha
1998-01-01
Autores
Rodríguez, Jorge Arturo
Ruiz Gómez, Kherson
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Editor
Universidad Nacional [Costa Rica ]
Resumen
Cetengraulis mistycetus es una anchoveta americana, que se encuentra localizada en la costa americana de México hasta Perú. Su valor comercial es relevante en la parte interna del Golfo de Nicoya, ya que la flota artesanal tradicional la utiliza como carnada viva para la línea de anzuelos.
En el presente estudio, se determinó la edad de la primera madurez sexual fue de 1:1,2 machos por hembra, para la época de mayor desove. La Fecundidad total se estimó entre 48.498 oocitos en las tallas que van de 19 a 21, 9 cm. La fecundidad relativa estimada fue de 813 oocitos por gramo de pez para el primer grupo de talla y de 1.1145 oocitos para gramo de pez para el segundo.
Cetengraulis mysticetus in an American anchovy found on the Pacific coast between Mexico and Peru. The fecundity and the biometry relations were studied in the Gulf of Nicoya population, Costa Rica. The length of first sexual maturity was estimated to be 12.6 cm. The sex ratio was 1:1.2 male to female in the maximum spawning period. The total fecundity changed from 48,498 oocytes to 98,278 oocytes according to the total length size. The relative fecundity was estimated in two length-size groups, the first group fish and the second group (19-21.9 cm length) with 1,145 oocytes per gram fish. The biometric study shows differences only in dorsal length with total length length size relation, females are isometric and males are negative alometric. The other body relationships are equal in both male and female.
Cetengraulis mysticetus in an American anchovy found on the Pacific coast between Mexico and Peru. The fecundity and the biometry relations were studied in the Gulf of Nicoya population, Costa Rica. The length of first sexual maturity was estimated to be 12.6 cm. The sex ratio was 1:1.2 male to female in the maximum spawning period. The total fecundity changed from 48,498 oocytes to 98,278 oocytes according to the total length size. The relative fecundity was estimated in two length-size groups, the first group fish and the second group (19-21.9 cm length) with 1,145 oocytes per gram fish. The biometric study shows differences only in dorsal length with total length length size relation, females are isometric and males are negative alometric. The other body relationships are equal in both male and female.
Descripción
Palabras clave
ANCHOAS, FERTILIDAD ANIMAL, GOLFO DE NICOYA (COSTA RICA), ANCHOVIES, ANIMAL FERTILITY