Age, growth and maturation of jumbo squid Dosidicus gigas (Cephalopoda: Ommastrephidae) from the Gulf of California, México

By U. Markaida, C. Quiñonez-Velázquez, O. Sosa‐Nishizaki. 2004

90 citations recorded by the source corpus.

Abstract This study describes the age and growth of large specimens of the jumbo squid Dosidicus gigas that supported the fishery in the Gulf of California in 1995–1997. Statoliths of 299 females (10.8–87.5 cm mantle length, ML) and 147 males (17–73.9 cm ML) were read. Assuming a daily rhythm of statolith deposition the smallest female (10.8 cm ML) was 84 days old and the largest (87.5 cm ML) 386 days old. The oldest females were 14–15 months old. The smallest male (17 cm ML) was 135 days old and the oldest male (71.5 cm ML) was 372 days old. The logistic model best described growth in jumbo squid. Growth curves were similar to those reported from other studies on this species using statolith reading. However, they suggest a faster growth than that described by size frequency analysis. No differences in growth were noted between seasons, except that females from Sta. Rosalia weighed more than those caught off Guaymas at the same age. Females grew faster than males, but both sexes grew more than 2 mm/day between 140th and 300th day of life: one of the highest absolute growth rates recorded so far for squids. Large size females mature late, at an age of 1 year and 73 cm ML and males matured at 10 months and 60 cm ML. Females of the medium-sized maturing group mature at 7 months and 37 cm ML and males at 7 months and 34 cm. Thus, this latter group was regarded as an early maturing group, living probably less than a year, and the former as a late maturing group, living a year or slightly more. Hatch dates were distributed throughout the whole year, without reflecting any reproductive pattern. Large jumbo squid in the Gulf of California comprised a population of multiple intra-annual cohorts using alternate upwelling seasonal areas during their growth.

Subfields: Ecology, Ecology, Evolution, Behavior and Systematics, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/921d56c4e58abac5221943334b2f6b86ba8aea7e

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Ecology

In Ecology, Evolution, Behavior and Systematics

In Global and Planetary Change

Citations in the corpus

Stable isotopes in jumbo squid (Dosidicus gigas) beaks to estimate its trophic position: comparison between stomach contents and stable isotopes (2006, methodology): “The logistic curve (Markaida et al., 2004) was used for ages 4210 days (t in days): BW ¼ BW1/½1þ exp (k(t t0)) (2) We used average values of BW?”
Vertical and horizontal migrations by the jumbo squid Dosidicus gigas revealed by electronic tagging (2006, background): “This squid is extremely fast growing, increasing from 1 mm ML at birth to 1 m ML in a life-span of 1 to 2 yr (Nigmatullin et al. 2001, Markaida et al. 2004).”