Marcas periódicas en otolitos de Sardinops sagax caerulea y posibles relaciones con su reproducción, en Bahía Magdalena, B. C.S .,México

Abstract

Monthly composition of size and age, as well as sexual maturity of Sardinops sagax caerulea were analyzed during 1981-1982 on the commercial fleet that operates in Bahía Magdalena. Size of sampled organisms fluctuated between 125-202 mm and the recruitment size was estimated as 130-135 mm standard length. Two spawning periods were detected; one in june-august and another in February-March, which generate 2 yearly periods of recruitment of organisms of age 0, one in february and another one in august-september. The relationshíp between the two spawning periods and the periodic hyaline and opaque bands of the otoliths is discussed, the possibility that these bands occur with a frequency of six months is put forward.