SciELO - Scientific Electronic Library Online

 
vol.7 issue1Length-weight relationships of the Indian Major Carp, tabeo rohita (Cypriniformes: Cyprinidae) from six drainages of Ganga basin, IndiaA new species of Hemibrycon (Characiformes: Characidae), a freshwater fish from the Sierra Nevada of Santa Marta, Caribbean drainage, Colombia author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Cuadernos de Investigación UNED

Print version ISSN 1659-4266

Abstract

ALEJO-PLATA, María del Carmen; HERRERA-GALINDO, Jorge Eduardo  and  GOMEZ-MARQUEZ, José Luis. Size, sex and maturity of the squid Lolliguncula diomed eae (Cephalopoda: Loliginidae) in the Gulf of Tehuantepec, México. Cuadernos de Investigación UNED [online]. 2015, vol.7, n.1, pp.79-88. ISSN 1659-4266.

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 indica-tors 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 relation-ship 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 (L) 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.

Keywords : Squid; shrimp fishing; by catch; Oaxaca.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )