Daily cycle and body characteristics of mating Litopenaeus vannamei shrimps (Decapoda: Penaeidae) in the wild off southern Sinaloa, Mexico
| Autor: | Sergio Rendón-Rodríguez, J.A. Calderón-Pérez, R. Solís-Ibarra |
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| Rok vydání: | 2005 |
| Předmět: |
Male
Periodicity Penaeidae diel reproduction Range (biology) Biología Litopenaeus condiciones de apareamiento Zoology Environment Gulf of California Animals Sex Ratio Mating Mexico lcsh:QH301-705.5 mating conditions biology Decapoda Ecology Mating Preference Animal ciclo diario de reproducción biology.organism_classification Golfo de California Salinity lcsh:Biology (General) Spermatophore Female General Agricultural and Biological Sciences Male to female Litopenaeus vannamei |
| Zdroj: | Universidad Nacional Autónoma de México UNAM Redalyc-UNAM Revista de Biología Tropical; Vol. 55 No. 1 (2007): Volume 55 – Regular number 1 – March 2007 Revista de Biología Tropical; Vol. 55 Núm. 1 (2007): Volumen 55 – Número regular 1 – Marzo 2007 Revista Biología Tropical; Vol. 55 N.º 1 (2007): Volumen 55 – Número regular 1 – Marzo 2007 Portal de Revistas UCR Universidad de Costa Rica instacron:UCR Revista de Biología Tropical (Costa Rica) Num.1 Vol.55 Revista de Biología Tropical, Vol 55, Iss 1, Pp 189-198 (2007) Revista de Biología Tropical, Volume: 55, Issue: 1, Pages: 189-198, Published: MAR 2007 |
| ISSN: | 2215-2075 0034-7744 |
| DOI: | 10.15517/rbt.v55i1.6070 |
| Popis: | Mating behavior has been described for very few species of penaeoid shrimps. We describe some of the environmental conditions under which mating of Litopenaeus vannamei took place in the ocean, as inferred by the presence of attached spermatophores on the thelycum of females, combined with the presence of mature males with empty ampulla terminalis, both evidence of recent copulation. Out of a total of twelve 24 hr samplings on board the research vessel B/O "EL PUMA", one was selected to examine mating. There were four periods of observation. The highest frequency of females with attached spermatophores were found during the daytime whilst the lowest was registered during the night. Females with attached spermatophore were mostly at stages IV and V of ovarian maturity and fell within the 30 - 50 mm of C.L. range. Copulating male size ranged between 30 and 40 mm of C.L. and there was a close relation between the percentage of mating females and males. Male to female ratio varied throughout the sampling period but it was never 1:1. The female mean size was, in all cases, bigger than the male mean size. Among the environmental factors, salinity and oxygen varied very slightly throughout the sampling period; temperature variation was more pronounced and those changes were attributed to the tidal oscillation. Rev. Biol. Trop. 55 (1): 189-198. Epub 2007 March. 31.Estudiamos el apareamiento del camarón Litopenaeus vannamei . La mayoría de las hembras con espermatóforos fueron capturadas durante el día y estaban en las etapas IV y V de desarrollo ovárico (longitud 30 - 50 mm. Los machos apareados midieron entre 30 y 40 mm. La proporción sexual varió pero nunca fue 1:1. Las hembras siempre fueron más grandes que los machos. Durante el muestreo, la salinidad y el oxígeno variaron poco. La temperatura varió más y atribuimos estos cambios a las mareas. |
| Databáze: | OpenAIRE |
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