Embryonic and larval development of eugerres mexicanus (Perciformes: Gerreidae) in Tenosique, Tabasco, Mexico
Most studies on Eugerres mexicanus mainly consider biogeographic and systematic aspects and rarely address reproductive characteristics, which are useful for fishery population management plans. This study aimed at evaluating the ontogeny of E. mexicanus, based on 30 embryos and 30 larvae sampled by induced spawning of breeders, taken in February 2009 from the Usumacinta River in Tenosique, Tabasco, Mexico. All descriptions of the embryonic development were based on morphometric and meristic data and followed standard methods. Eggs, recovered at the gastrula stage, had an average diameter of 1.17mm (SD=0.08). The bud stage appeared during the first three hours of development, in which the posterior side was adhered to the vitellus; Kupffer´s vesicle was visible. Yolk-sac larvae hatched 18 hours after fertilization, exhibiting a light brown color and an average total length of 2.94mm (SD=0.70); the preflexion stage was reached eight days after hatching, with a total average length of 4.67mm (SD=0.50) and a total notochord length of 4.45mm (SD=0.50). The flexion stage was reached on the 16th day, with an average total length of 6.66mm (SD=1.53), while postflexion was reached on the 24th day, with 10.33mm (SD=1.45).
| Main Authors: | , , , , , , |
|---|---|
| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | Eugerres mexicanus, Larvas de peces, Reproducción de peces, Artfrosur, |
| Online Access: | https://www.redalyc.org/articulo.oa?id=44923251026 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|