Density and gender segregation effects in the culture of the caridean ornamental red cherry shrimp <i>Neocaridina davidi</i> Bouvier, 1904 (Caridea: Atyidae)
The effect of density on growth, sex ratio, survival, and biochemical composition of the red cherry shrimp, <i>Neocaridina davidi</i> Bouvier, 1904, was studied to determine optimum rearing conditions in this ornamental species. It was tested whether gender segregation affected growth an...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | Argentina |
| Recursos: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/87436 |
| Acesso em linha: | http://sedici.unlp.edu.ar/handle/10915/87436 |
| Access Level: | acceso abierto |
| Palavra-chave: | Ciencias Naturales Aquaculture Biochemical composition Growth Rearing conditions Survival |
| Resumo: | The effect of density on growth, sex ratio, survival, and biochemical composition of the red cherry shrimp, <i>Neocaridina davidi</i> Bouvier, 1904, was studied to determine optimum rearing conditions in this ornamental species. It was tested whether gender segregation affected growth and survival of the species. To test the effect of density (Experiment 1), hatched juvenile shrimp were kept at three different densities: 2.5, 5, and 10 individuals l<sup>-1</sup> (D<sub>2.5</sub>, D<sub>5</sub> and D<sub>10</sub>, respectively). To test the effect of gender segregation (Experiment 2), 30-day juveniles were reared in three conditions: culture with only females, culture with only males, and mixed culture (females: males 1:1) at 5 individuals l<sup>-1</sup> density. Experiments lasted 90 days, and shrimp were weighted either every 30 days (Experiment 1) or 15 days (Experiment 2). At day 90, females kept at D<sub>2.5</sub> weighted 45% more than females stocked at D<sub>10</sub> (P < 0.05), whereas females from D<sub>5</sub did not differ from those of other densities (P > 0.05). Males at D<sub>2.5</sub> weighted 29% more than D<sub>5</sub and D<sub>10</sub> (P < 0.05). Survival was high and unaffected by treatment. Sexual differentiation did not differ among treatments. Females from D<sub>2.5</sub> had the lowest lipid and protein content, which would occur if they had a higher spawning. Males from D<sub>2.5</sub> had higher content of proteins, probably due to their larger size. Gender segregation had no effect over growth and survival; females grew up to a larger size than males both in monosex and mixed culture. It was shown that given to their non-aggressive behavior, <i>N. davidi</i> is tolerant to a highdensity condition, which makes it feasible as an ornamental species. |
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