franja-sup-Home franja-sup-UV

EspañolEnglish

Volume 41 - Number 1 - 2006
Artículo


Ichthyoplankton composition and variability of the laguna El Quelele, Nayarit, Mexico

María del Carmen Navarro-Rodríguez1, Luis Fernando González Guevara1, Ramiro Flores-Vargas2, María Elena González Ruelas1 y Fátima Maciel Carrillo González1

 

1 Centro Universitario de la Costa, Campus Vallarta, Departamento de Ciencias, Universidad de Guadalajara, Av. Universidad, No. 203 Delegación Ixtapa Puerto Vallarta C.P. 48280, Jalisco, México. (UDG-CA-345)
2 Centro Universitario de la Costa Sur, Departamento de Estudios para el Desarrollo Sustentable de Zonas Costeras, Universidad de Guadalajara, Gómez Farías No. 82 San Patricio-Melaque, Jalisco, México. (UDG-CA-341)

 

E-mail: carmenna@universo.com


This study presents an analysis of a spatial and temporal variation of ichthyoplankton abundance in the lagoon El Quelele, Bahía de Banderas, Nayarit. Twenty diurnal plankton tows were conducted seasonally from spring to winter 2001. Of twenty total samples of zooplankton 224,4 fish larvae were obtained, represented by six families eight genera and six species, being Engraulis mordax the most abundant species (68 org. m-3), followed by Dormitator latifroms (37 org. m-3) and Trachinotus rhodopus (18 org. m-3). Variations of the spatio-temporal abundance were influenced by surface temperature (29,8-31,6°C) and salinity (11-34,8 psu) as well as by tidal conditions and season. The highest concentrations occurred during autumn ( 81 org. m-3) and winter (43 org. m-3) associated to the cold season, and smallest abundances in spring (21 org. m-3) and summer associated to the warm season and abundant rains; in summer, no larvae were captured. The Shannon index showed that site of sampling 1 presented the highest diversity value (1,47) whereas, by season diversity was practically homogenous. Cluster analysis showed greater affinity between sites 2 and 3 (1,05) and between cold months (autumn and winter) with a value of 0,83.

 

Key words: Fish larvae, diversity, spatial and temporal patterns, environmental factors, Pacific northeast

 

 pdficon-rbmoDownload

 

1Laboratorio de Zooplancton, Instituto de Ciencias del Mar y Limnología,Universidad Nacional Autónoma de México. A. P. 70-305, 04510 México, D. F. México
 
atasehir evden eve nakliyat avcilar evden eve nakliyat umraniye evden eve nakliyat beylikduzu evden eve nakliyat sisli evden eve nakliyat bahcelievler evden eve nakliyat