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 | Acesso ao texto completo restrito à biblioteca da Epagri-Sede. Para informações adicionais entre em contato com biblio@epagri.sc.gov.br. |
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Registro Completo |
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Biblioteca(s): |
Epagri-Chapecó; Epagri-Sede. |
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Data corrente: |
21/11/1995 |
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Data da última atualização: |
16/04/2014 |
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Autoria: |
TAMASSIA, S. T. J. |
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Afiliação: |
Epagri. |
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Título: |
Techniques for enumeration of channel catfish sac fry and the impact of initial confinement of fry on growth and survival in primary nursery ponds. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
1993. 31 f. |
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Idioma: |
Inglês |
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Notas: |
Dissertação (Master of Science)- Faculty of Auburn University, Auburn, Alabama, 1993. |
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Conteúdo: |
Four procedures for enumerating channel sac fry were evaluated: a) wet weight; b) wet volume; c) dry weight; and d) dry volume using a balance and volumetric cylinder of equal precision. The relative precision and accuracy of each technique was determined for various samples of one-day-old sac fry. The number of samples and the size of samples needed for an efficient but accurate enumeration was studied. The maternal effect, and fry age on the number sac fry per unit weight or volume was evaluated. Dry weight or volume estimates were more variable than wet estimates. Six samples of 50 fry each using a wet weight or volume estimate had a 95% accuracy. The smaller the sample size the fewer number of fry estimated per unit. Both sac fry age and individual differences between females had a significant effect on the number of sac fry per unit. A wet weight enumeration of sac fry allows the same degree of precision when enumerating large or small quantities of fry. A wet volumetric enumeration requires a less precise tool when enumerating large quantities. The effect of confinement before channel catfish fry release into earthen nursery ponds was evaluated. One-day-old catfish sac fry were stocked directly into 0.04-ha earthen ponds at density of 165,000/ ha or held in the hatchery and fed for 3 or 7 days before release, o r geld in a net cage in the pond for 7 days before release. Highest survivals were attained when one-day-old swim-up fry were transferred directly to earthen ponds (81.8%) or reared three days in troughs (84.7%), compared to fry held for seven days in troughs (66.3%) or seven days inside net cages (65.9%). No significant differences were found among treatments in mean final weight (range from 2.25 to 2.50 g), or mean final length (range from 6.62 to 6.83 cm). Yields ranged between 236.89 and 343.87 kg/ha and were significantly correlated to survival. MenosFour procedures for enumerating channel sac fry were evaluated: a) wet weight; b) wet volume; c) dry weight; and d) dry volume using a balance and volumetric cylinder of equal precision. The relative precision and accuracy of each technique was determined for various samples of one-day-old sac fry. The number of samples and the size of samples needed for an efficient but accurate enumeration was studied. The maternal effect, and fry age on the number sac fry per unit weight or volume was evaluated. Dry weight or volume estimates were more variable than wet estimates. Six samples of 50 fry each using a wet weight or volume estimate had a 95% accuracy. The smaller the sample size the fewer number of fry estimated per unit. Both sac fry age and individual differences between females had a significant effect on the number of sac fry per unit. A wet weight enumeration of sac fry allows the same degree of precision when enumerating large or small quantities of fry. A wet volumetric enumeration requires a less precise tool when enumerating large quantities. The effect of confinement before channel catfish fry release into earthen nursery ponds was evaluated. One-day-old catfish sac fry were stocked directly into 0.04-ha earthen ponds at density of 165,000/ ha or held in the hatchery and fed for 3 or 7 days before release, o r geld in a net cage in the pond for 7 days before release. Highest survivals were attained when one-day-old swim-up fry were transferred directly to earthen po... Mostrar Tudo |
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Palavras-Chave: |
AQUICULTURA; BAGRE AFRICANO; CATFISH; PISCICULTURA. |
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Categoria do assunto: |
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L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 02483nam a2200169 a 4500
001 1011604
005 2014-04-16
008 1993 bl uuuu m 00u1 u #d
100 1 $aTAMASSIA, S. T. J.
245 $aTechniques for enumeration of channel catfish sac fry and the impact of initial confinement of fry on growth and survival in primary nursery ponds.
260 $a1993. 31 f.$c1993
500 $aDissertação (Master of Science)- Faculty of Auburn University, Auburn, Alabama, 1993.
520 $aFour procedures for enumerating channel sac fry were evaluated: a) wet weight; b) wet volume; c) dry weight; and d) dry volume using a balance and volumetric cylinder of equal precision. The relative precision and accuracy of each technique was determined for various samples of one-day-old sac fry. The number of samples and the size of samples needed for an efficient but accurate enumeration was studied. The maternal effect, and fry age on the number sac fry per unit weight or volume was evaluated. Dry weight or volume estimates were more variable than wet estimates. Six samples of 50 fry each using a wet weight or volume estimate had a 95% accuracy. The smaller the sample size the fewer number of fry estimated per unit. Both sac fry age and individual differences between females had a significant effect on the number of sac fry per unit. A wet weight enumeration of sac fry allows the same degree of precision when enumerating large or small quantities of fry. A wet volumetric enumeration requires a less precise tool when enumerating large quantities. The effect of confinement before channel catfish fry release into earthen nursery ponds was evaluated. One-day-old catfish sac fry were stocked directly into 0.04-ha earthen ponds at density of 165,000/ ha or held in the hatchery and fed for 3 or 7 days before release, o r geld in a net cage in the pond for 7 days before release. Highest survivals were attained when one-day-old swim-up fry were transferred directly to earthen ponds (81.8%) or reared three days in troughs (84.7%), compared to fry held for seven days in troughs (66.3%) or seven days inside net cages (65.9%). No significant differences were found among treatments in mean final weight (range from 2.25 to 2.50 g), or mean final length (range from 6.62 to 6.83 cm). Yields ranged between 236.89 and 343.87 kg/ha and were significantly correlated to survival.
653 $aAQUICULTURA
653 $aBAGRE AFRICANO
653 $aCATFISH
653 $aPISCICULTURA
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Registro original: |
Epagri-Sede (Epagri-Sede) |
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| Registros recuperados : 21 | |
| 10. |  | SCHAPPO, C.L.; TAMASSIA, S.T.J. Modelo alto vale do Itajai de piscicultura integrada - (1) caracterizacao geral e alguns parametros operacionais. In: SIMPOSIO BRASILEIRO DE AQUICULTURA, 11. ENCONTRO SULBRASILEIRO DE AQUICULTURA, 4. ENCONTRO CATARINENSE DE AQUICULTURA, 5. FESTIVAL NACIONAL DA OSTRA E DA CULTURA ACORIANA, 2, 2000, Florianopolis, SC. Anais... Florianopolis: BMLP, 2000. CD-ROM.| Biblioteca(s): Epagri-Sede. |
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| 17. | | RORIG, L.R.; TAMANAHA, M.da S.; GARCIA, M.; TAMASSIA, S.T.J.; SCHAPPO, C.L. Modelo Alto Vale do Itajai de piscicultura integrada: (6) composicao e estrutura das assembleias fitoplantonicas e sua relacao com variaveis fisico-quimicas da agua. In: SIMPOSIO BRASILEIRO DE AQUICULTURA, 12., 2002, Goiania, GO. Anais, resumos e palestras... Goiania: Abraq, 2002. p.215| Biblioteca(s): Epagri-Sede. |
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| 19. | | TAMASSIA, S.T.J.; GRAEFF, A.; SCHAPPO, C.L.; APPEL, H.B.; AMARAL JR., H.; CASACA, J.de M.; TOMAZELLI JR., O. Ciprinicultura - o modelo de Santa Catarina. In: CYRINO, J. E. P.; URBINATI, E. C.; FRACALOSSI, D. M.; CASTAGNOLLI, N. (Eds.). Topicos especiais em piscicultura de agua doce tropical intensiva. Sao Paulo: TecArt, 2004. p.267-305.| Tipo: Capítulo em Livro Técnico-Científico | Circulação/Nível: -- - -- |
| Biblioteca(s): Epagri-Sede. |
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| 20. | | TAMASSIA, S. T. J.; GRAEFF, A.; SCHAPPO, C. L.; APPEL, H. B.; AMARAL JÚNIOR, H.; CASACA, J. M.; KNIESS, V.; TOMAZELLI JÚNIOR, O. Ciprinicultura: modelo de Santa Catarina. In: CYRINO, J. E. P. et al. Topicos especiais em piscicultura de água doce tropical intensiva. São Paulo: TecArt, 2004. p. 267-308.| Tipo: Capítulo em Livro Técnico-Científico | Circulação/Nível: -- - -- |
| Biblioteca(s): Epagri-Sede. |
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| Registros recuperados : 21 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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