Reproductive variability of the Amazon River prawn, Macrobrachium amazonicum (Caridea, Palaemonidae): influence of life cycle on egg production
| Autor: | Andrea L. Meireles, Fernando L. Mantelatto, Wagner Cotroni Valenti |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade de São Paulo (USP) |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
producción de huevos
QH301-705.5 Population Zoology SH1-691 Context (language use) GC1-1581 Aquatic Science Oceanography Aquaculture potencial reproductivo biology.animal Macrobrachium amazonicum reproductive potential Aquaculture. Fisheries. Angling Biology (General) education ecological plasticity education.field_of_study Macrobrachium biology business.industry egg production biology.organism_classification Fecundity Caridea Prawn business Palaemonidae plasticidad ecológica Brazil |
| Zdroj: | Latin american journal of aquatic research v.41 n.4 2013 SciELO Chile CONICYT Chile instacron:CONICYT Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Latin American Journal of Aquatic Research, Vol 41, Iss 4, Pp 718-731 (2013) |
| Popis: | Made available in DSpace on 2014-12-03T13:11:24Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-09-01Bitstream added on 2014-12-03T13:23:33Z : No. of bitstreams: 1 WOS000328337700008.pdf: 620853 bytes, checksum: 96832ce8df21d1d7e4dbe726be53393b (MD5) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Diverse reproductive strategies may be adopted by different species of Macrobrachium prawns, and even among different populations of the same species. The present study evaluated the influence of differences in the reproductive strategies of two geographically isolated populations of Macrobachium amazonicum, upon female fecundity, reproductive output and the chemical content of prawns and eggs. One prawn population from Para only completes its life cycle in brackish water, whereas another from Mato Grosso do Sul only inhabits freshwater. Para female prawns exhibited a larger average size and weight and produced more eggs than females from Mato Grosso do Sul. However, the Mato Grosso do Sul population produced eggs that were larger in volume than those of females from the other population. Furthermore, eggs produced by Para prawns were composed primarily of water (56%), whereas those produced in Mato Grosso do Sul were composed mostly of organic matter (80%). This difference in the eggs' chemical compositions did not apply to the chemical compositions of the females, as individuals from both sites were composed primarily of water. Mato Grosso do Sul females invested a higher amount of energy in brood formation (14% of their wet weight) than individuals from Para (only 10%). It is possible that M. amazonicum populations show a higher degree of plasticity in their reproductive activity due to habitat conditions and genetic differences. Although the brackish population produces larger individuals, and exhibits higher fecundity, the freshwater population exhibited a higher reproductive investment. These results suggest a high reproductive capacity to adapt to different environmental conditions for this species, which should be considered in the context of aquaculture activities. Univ Estadual Paulista, Unidade Sao Vicente, BR-11330900 Sao Vicente, SP, Brazil Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto FFCLR, Dept Biol,Postgrad Program Comparat Biol, Lab Bioecol & Crustacean Systemat, BR-14040901 Ribeirao Preto, SP, Brazil Univ Estadual Paulista, Unidade Sao Vicente, BR-11330900 Sao Vicente, SP, Brazil CNPq: 155209/2006-0 CNPq: 473050/2007-2 CNPq: 471011/2011-8 CNPq: 302748/2010-5 CNPq: 500574/2003-0 |
| Databáze: | OpenAIRE |
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