Seasonal variation in the length structure and reproductive condition of the jumbo squid Dosidicus gigas (d'Orbigny, 1835) off central-south Chile

Christian M. Ibáñez, Luis A. Cubillos

Resultado de la investigación: Article

36 Citas (Scopus)

Resumen

In the area off central-south Chile (34-40°S), a new period of high abundance of Dosidicus gigas has occurred since 2001. The seasonal changes in length structure and reproductive condition of D. gigas in oceanic and coastal waters are described for the period July 2003 to February 2004. The length structure varied significantly between seasons and zones. In the austral winter, medium-sized, maturing individuals were found in oceanic waters while large-sized mature males and maturing females were present in the coastal zone. In the austral spring, maturing medium-sized and large-sized individuals were observed in the oceanic zone. In contrast, two groups of individuals were observed in the coastal zone: one consisting of small and immature individuals, and one consisting of medium-sized maturing specimens. In the austral summer, only the oceanic zone was sampled, and samples contained small immature and maturing medium-sized individuals. We postulate that the spatial and temporal changes in length structure and reproductive condition of D. gigas off central-south Chile are probably due to the existence of a migratory strategy of the species in the study area.

Idioma originalEnglish
Páginas (desde-hasta)123-128
Número de páginas6
PublicaciónScientia Marina
Volumen71
N.º1
DOI
EstadoPublished - 1 ene 2007

Huella dactilar

Dosidicus gigas
Chile
seasonal variation
coastal zone
immatures
coastal water
winter
summer
sampling
water

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

Citar esto

@article{45c1e49b78084026a624515906e6705d,
title = "Seasonal variation in the length structure and reproductive condition of the jumbo squid Dosidicus gigas (d'Orbigny, 1835) off central-south Chile",
abstract = "In the area off central-south Chile (34-40°S), a new period of high abundance of Dosidicus gigas has occurred since 2001. The seasonal changes in length structure and reproductive condition of D. gigas in oceanic and coastal waters are described for the period July 2003 to February 2004. The length structure varied significantly between seasons and zones. In the austral winter, medium-sized, maturing individuals were found in oceanic waters while large-sized mature males and maturing females were present in the coastal zone. In the austral spring, maturing medium-sized and large-sized individuals were observed in the oceanic zone. In contrast, two groups of individuals were observed in the coastal zone: one consisting of small and immature individuals, and one consisting of medium-sized maturing specimens. In the austral summer, only the oceanic zone was sampled, and samples contained small immature and maturing medium-sized individuals. We postulate that the spatial and temporal changes in length structure and reproductive condition of D. gigas off central-south Chile are probably due to the existence of a migratory strategy of the species in the study area.",
keywords = "Central-south Chile, Dosidicus gigas, Jumbo squid, Length structure, Reproduction",
author = "Ib{\'a}{\~n}ez, {Christian M.} and Cubillos, {Luis A.}",
year = "2007",
month = "1",
day = "1",
doi = "10.3989/scimar.2007.71n1123",
language = "English",
volume = "71",
pages = "123--128",
journal = "Scientia Marina",
issn = "0214-8358",
publisher = "CSIC Consejo Superior de Investigaciones Cientificas",
number = "1",

}

TY - JOUR

T1 - Seasonal variation in the length structure and reproductive condition of the jumbo squid Dosidicus gigas (d'Orbigny, 1835) off central-south Chile

AU - Ibáñez, Christian M.

AU - Cubillos, Luis A.

PY - 2007/1/1

Y1 - 2007/1/1

N2 - In the area off central-south Chile (34-40°S), a new period of high abundance of Dosidicus gigas has occurred since 2001. The seasonal changes in length structure and reproductive condition of D. gigas in oceanic and coastal waters are described for the period July 2003 to February 2004. The length structure varied significantly between seasons and zones. In the austral winter, medium-sized, maturing individuals were found in oceanic waters while large-sized mature males and maturing females were present in the coastal zone. In the austral spring, maturing medium-sized and large-sized individuals were observed in the oceanic zone. In contrast, two groups of individuals were observed in the coastal zone: one consisting of small and immature individuals, and one consisting of medium-sized maturing specimens. In the austral summer, only the oceanic zone was sampled, and samples contained small immature and maturing medium-sized individuals. We postulate that the spatial and temporal changes in length structure and reproductive condition of D. gigas off central-south Chile are probably due to the existence of a migratory strategy of the species in the study area.

AB - In the area off central-south Chile (34-40°S), a new period of high abundance of Dosidicus gigas has occurred since 2001. The seasonal changes in length structure and reproductive condition of D. gigas in oceanic and coastal waters are described for the period July 2003 to February 2004. The length structure varied significantly between seasons and zones. In the austral winter, medium-sized, maturing individuals were found in oceanic waters while large-sized mature males and maturing females were present in the coastal zone. In the austral spring, maturing medium-sized and large-sized individuals were observed in the oceanic zone. In contrast, two groups of individuals were observed in the coastal zone: one consisting of small and immature individuals, and one consisting of medium-sized maturing specimens. In the austral summer, only the oceanic zone was sampled, and samples contained small immature and maturing medium-sized individuals. We postulate that the spatial and temporal changes in length structure and reproductive condition of D. gigas off central-south Chile are probably due to the existence of a migratory strategy of the species in the study area.

KW - Central-south Chile

KW - Dosidicus gigas

KW - Jumbo squid

KW - Length structure

KW - Reproduction

UR - http://www.scopus.com/inward/record.url?scp=34147130835&partnerID=8YFLogxK

U2 - 10.3989/scimar.2007.71n1123

DO - 10.3989/scimar.2007.71n1123

M3 - Article

AN - SCOPUS:34147130835

VL - 71

SP - 123

EP - 128

JO - Scientia Marina

JF - Scientia Marina

SN - 0214-8358

IS - 1

ER -