Size, sex and maturity of the squid Lolliguncula diomedeae (Cephalopoda: Loliginidae) in the Gulf of Tehuantepec, México.

Size, sex and maturity of the squid Lolliguncula diomedeae (Cephalopoda: Loliginidae) in the Gulf of Tehuantepec, México.

Authors

  • María del Carmen Alejo-Plata Universidad del Mar, Campus Puerto Ángel, Ciudad Universitaria, Puerto Ángel, Pochutla, C.P: 70902, Oaxaca, México
  • José Luis Gómez-Márquez Universidad Nacional Autónoma de México, Av. 5 de Mayo y Fuerte de Loreto, Col. Ejército de Oriente, Iztapalapa, CP 9020, D.F., México
  • Jorge Eduardo Herrera-Galindo Universidad del Mar, Campus Puerto Ángel, Ciudad Universitaria, Puerto Ángel, Pochutla, C.P: 70902, Oaxaca, México

DOI:

https://doi.org/10.22458/urj.v7i1.867

Keywords:

Squid, shrimp fishing, by catch, Oaxaca

Abstract

There is practically no information on the biology of Lolliguncula (Loliolopsis) diomedeae. We analyzed specimens caught in four shrimp fishing trips in the Gulf of Tehuantepec in 1999-2001, 2004 and 2006.
Sexual maturity and gonadosomatic index (GSI) were used as indicators of reproductive activity. A total of 1 200 individuals were captured, 89% female. Females ranged from 35 to 97mm in mantle length (LDM),
with a mode at 80mm and weights 2 to 30,9g; males 20,7 to 65mm LDM with a mode at 35-40mm and weights from 0,4 to 12g. Differences in the LDM and the PT between males and females were significant (KS, p<0,05). The sex ratio was 8:1 H:M (p <0,05). The weight-length relationship type is potential for both sexes, with a negative allometric growth.
83% of mature females had high IGS values, in contrast to less than 20% of mature males. The size at first maturity (L50) indicates that males (42,7mm LDM) mature when shorter than females (74,5mm LDM). Maturity, IGS and oceanographic features of the Gulf of Tehuantepec indicate that L. diomedeae spawn there.

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Published

2015-06-05

How to Cite

Alejo-Plata, M. del C., Gómez-Márquez, J. L., & Herrera-Galindo, J. E. (2015). Size, sex and maturity of the squid Lolliguncula diomedeae (Cephalopoda: Loliginidae) in the Gulf of Tehuantepec, México. UNED Research Journal, 7(1), 79–87. https://doi.org/10.22458/urj.v7i1.867

Issue

Vol. 7 No. 1 (2015)

Section

Articles

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