| Registro completo |
| Provedor de dados: |
Ciência Rural
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| País: |
Brazil
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| Título: |
Lethal temperatures for Rhamdia quelen larvae (Pimelodidae)
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| Autores: |
Chippari-Gomes,Adriana Regina
Gomes,Levy Carvalho
Baldisserotto,Bernardo
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| Data: |
2000-12-01
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| Ano: |
2000
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| Palavras-chave: |
Rhamdia quelen
Larvae
Lethal temperatures
Hatching
Silver catfish
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| Resumo: |
The lower and upper lethal temperatures (LT50) of R. quelen larvae were determined. The larvae were obtained from two spawning periods with hatching temperatures of 21 and 26ºC respectively. Larvae were placed in tanks at which the temperatures were either increased 1ºC every 15min, or reduced 1ºC every 20min until larval movement ceased. This temperature was then maintained for 96h. Minimum mortality (29.0 ± 1.5%) was observed in the larvae held at hatching temperatures. The lower LT50 were 15.01 and 16.72ºC, and the upper LT50 were 29.25 and 27.83ºC for the larvae hatching at 21 and 26ºC, respectively. Thus, apparently there is no difference with relation to temperature change tolerance between larvae hatched in both temperatures.
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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=S0103-84782000000600026
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| Editor: |
Universidade Federal de Santa Maria
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| Relação: |
10.1590/S0103-84782000000600026
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| Formato: |
text/html
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| Fonte: |
Ciência Rural v.30 n.6 2000
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| Direitos: |
info:eu-repo/semantics/openAccess
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