Translator Disclaimer
1 December 2008 Contribution to Understanding the Population Structure and Maturation of Illex argentinus (Castellanos, 1960): the Case of the Inner-shelf Spawning Groups in San Matias Gulf (Patagonia, Argentina)
Augusto César Crespi Abril, Enrique Mario Morsan, Pedro José Barón
Author Affiliations +
Abstract

Illex argentinus is known for spatiotemporally segregating into reproductive aggregations on the mid-continental shelf and slope off southern South America. In this study we found that the species also mates and spawns in San Matías Gulf, a coastal basin off northeastern Patagonia. Basing on the analysis of size and maturity structure of squids caught over a 28-month period in waters of the gulf, distinct demographic pulses were identified in the samples each year. Two of them were more consistent, one comprising small-sized individuals reaching full maturity in January to February (summer) and the other including larger individuals maturing between September and October/December (spring). Also, a less conspicuous group of mature individuals was observed in June/July (winter) of the last sampling year. So far, differences in the parameters of the size-at-maturity curves of these population components allow considering at least two stocks for management of I. argentinus in the gulf.

Augusto César Crespi Abril, Enrique Mario Morsan, and Pedro José Barón "Contribution to Understanding the Population Structure and Maturation of Illex argentinus (Castellanos, 1960): the Case of the Inner-shelf Spawning Groups in San Matias Gulf (Patagonia, Argentina)," Journal of Shellfish Research 27(5), 1225-1231, (1 December 2008). https://doi.org/10.2983/0730-8000-27.5.1225
Published: 1 December 2008
JOURNAL ARTICLE
7 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top