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)
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 Matias Gulf, a coastal basin off northeastern Patagonia. Basing on the ana...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2008 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/100391 |
| Acceso en línea: | http://hdl.handle.net/11336/100391 |
| Access Level: | acceso abierto |
| Palabra clave: | ILLEX ARGENTINUS MATURITY PROCESS POPULATION STRUCTURE SPRING SPAWNING SQUID SUMMER SPAWNING https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
| Sumario: | 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 Matias 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. |
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