| Registro completo |
| Provedor de dados: |
Iheringia, Sér. Zool.
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| País: |
Brazil
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| Título: |
Growth, molt and survival of Palaemonetes argentinus (Decapoda, Caridea) under different light-dark conditions
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| Autores: |
Díaz,Ana Cristina
Sousa,Liliana G.
Cuartas,Elena I.
Petriella,Ana María
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| Data: |
2003-09-01
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| Ano: |
2003
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| Palavras-chave: |
Growth
Molt
Photoperiod
Crustacea
Palaemonidae
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| Resumo: |
Growth, survival and molting rate in Palaemonetes argentinus Nobili, 1901 were compared under different light-dark conditions. During 80 days, 150 immatures of both sexes (initial mean weight 0.09±0.002g), from Los Padres lagoon, Mar del Plata, Argentina, were maintained in aquaria at 19±0.4°C under three light conditions: 0:24, 10:14 and 13:11 (L-D). They were fed daily on an artificial diet (45% proteins, 17.2% lipids, 7% water, 7% ash). Good weight increment was obtained with the three treatments, finding a positive linear correlation between mean weight and time (0:24, r=0.97; 10:14, r=0.99; 13:11, r=0.98). There were no significant differences in the percentage increment in mean weight among the treatments (0:24, 19.3%; 10:14, 29.3% and 13:11, 26.5%) (p<0.05). Molting rate was significantly higher at a long-day photoperiod (MR=1.7) than at a short-day (MR=0.6) or continuous dark condition (MR=0.3) (p<0.05). The lowest survival was found in animals maintained under 13:11 L-D conditions (77%), being statistically different of the other two treatments (92% and 89% at 10:14 and 0:24, respectively) (p<0.05). These results suggest that the best growth and survival in P. argentinus result with a 10:14 L-D cycle, and that the growth is less affected by photoperiod than molting rate and survival.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212003000300004
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| Editor: |
Museu de Ciências Naturais
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| Relação: |
10.1590/S0073-47212003000300004
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| Formato: |
text/html
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| Fonte: |
Iheringia. Série Zoologia v.93 n.3 2003
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| Direitos: |
info:eu-repo/semantics/openAccess
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