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| Natura: | Artículo científico |
| Lingua: | en |
| Pubblicazione: |
Universidad de Costa Rica
2007
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| Accesso online: | https://www.redalyc.org/articulo.oa?id=44955120 |
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Sommario:
- Daily cycle and body characteristics of mating Litopenaeus vannamei shrimps (Decapoda: Penaeidae) in the wild off southern Sinaloa, México J.A. Calderón-Pérez S. Rendón-Rodríguez R. Solís-Ibarra Biología diel reproduction mating conditions Gulf of California Litopenaeus vannamei Mating behavior has been described for very few species of penaeoid shrimps. We describe some ofthe environmental conditions under which mating of Litopenaeus vannamei took place in the ocean, as inferredby the presence of attached spermatophores on the thelycum of females, combined with the presence of maturemales with empty ampulla terminalis, both evidence of recent copulation. Out of a total of twelve 24 hr samplingson board the research vessel B/O EL PUMA, one was selected to examine mating. There were fourperiods of observation. The highest frequency of females with attached spermatophores were found during thedaytime whilst the lowest was registered during the night. Females with attached spermatophore were mostly atstages IV and V of ovarian maturity and fell within the 30 50 mm of C.L. range. Copulating male size rangedbetween 30 and 40 mm of C.L. and there was a close relation between the percentage of mating females andmales. Male to female ratio varied throughout the sampling period but it was never 1:1. The female mean sizewas, in all cases, bigger than the male mean size. Among the environmental factors, salinity and oxygen variedvery slightly throughout the sampling period; temperature variation was more pronounced and those changeswere attributed to the tidal oscillation. Rev. Biol. Trop. 55 (1): 189-198. Epub 2007 March. 31. 2007 artículo científico 0034-7744 https://www.redalyc.org/articulo.oa?id=44955120 en http://www.redalyc.org/revista.oa?id=449 Revista de Biología Tropical application/pdf Universidad de Costa Rica Revista de Biología Tropical (Costa Rica) Num.1 Vol.55