Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840)
The objective of this work was to evaluate the influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental fish severum (Heros severus). A completely randomized study was used with five treatments (0L:24D, 6L:18D, 12L:12D, 18L:6D, 24L:0D) and four replicates, w...
| Autor principal: | VERAS, Galileu Crovatto |
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| Outros Autores: | PAIXÃO, Daércio José de Macedo Ribeiro, BRABO, Marcos Ferreira, SOARES, Lourdes Marília Oliveira, SALES, Abner Dias |
| Grau: | Artigo |
| Idioma: | eng |
| Publicado em: |
Universidade Federal do Pará
2018
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.ufpa.br/jspui/handle/2011/9963 http://dx.doi.org/10.1590/S1806-92902016000700010 |
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ir-2011-9963 |
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dspace |
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ir-2011-99632018-06-07T05:29:42Z Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840) VERAS, Galileu Crovatto PAIXÃO, Daércio José de Macedo Ribeiro BRABO, Marcos Ferreira SOARES, Lourdes Marília Oliveira SALES, Abner Dias Ritmo circadiano Incubatório Comida viva Peixes ornamentais Severum CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA The objective of this work was to evaluate the influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental fish severum (Heros severus). A completely randomized study was used with five treatments (0L:24D, 6L:18D, 12L:12D, 18L:6D, 24L:0D) and four replicates, with the aquaria as the experimental unit. Two hundred severum larvae (3.20±0.16 mg and 5.60±0.00 mm) were distributed into 20 aquariums of one litre at a density of 10 larvae per litre. For a period of 15 days, feed was supplied four times daily with Artemia nauplii in a proportion of 160 nauplii/larvae/feeding. At the end of the experimental period, growth, uniformity, and survival data were subjected to analyses of variance and significance. Manipulation of the photoperiod showed no change in variables because there was no difference in the growth, uniformity, or survival of severum larvae. Thus, for larvae of this species of up to 20 days of age, the manipulation of the photoperiod is not advantageous due to the possible increase in production costs. Therefore, it is recommended to use the photoperiod close to the natural environment. 2018-06-06T18:41:51Z 2018-06-06T18:41:51Z 2016-07 Artigo de Periódico VERAS, Galileu Crovatto et al. Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840). Revista Brasileira de Zootecnia, Viçosa, v. 45, n. 7, p. 422-426, jul. 2016. Disponível em: <http://repositorio.ufpa.br/jspui/handle/2011/9963>. Acesso em:. 1806-9290 http://repositorio.ufpa.br/jspui/handle/2011/9963 http://dx.doi.org/10.1590/S1806-92902016000700010 eng Revista Brasileira de Zootecnia Acesso Aberto application/pdf Universidade Federal do Pará Brasil UFPA http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982016000700422&lng=pt&nrm=iso |
| institution |
Repositório Institucional - Universidade Federal do Pará |
| collection |
RI-UFPA |
| language |
eng |
| topic |
Ritmo circadiano Incubatório Comida viva Peixes ornamentais Severum CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA |
| spellingShingle |
Ritmo circadiano Incubatório Comida viva Peixes ornamentais Severum CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA VERAS, Galileu Crovatto Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840) |
| topic_facet |
Ritmo circadiano Incubatório Comida viva Peixes ornamentais Severum CNPQ::CIENCIAS AGRARIAS::RECURSOS PESQUEIROS E ENGENHARIA DE PESCA |
| description |
The objective of this work was to evaluate the influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental fish severum (Heros severus). A completely randomized study was used with five treatments (0L:24D, 6L:18D, 12L:12D, 18L:6D, 24L:0D) and four replicates, with the aquaria as the experimental unit. Two hundred severum larvae (3.20±0.16 mg and 5.60±0.00 mm) were distributed into 20 aquariums of one litre at a density of 10 larvae per litre. For a period of 15 days, feed was supplied four times daily with Artemia nauplii in a proportion of 160 nauplii/larvae/feeding. At the end of the experimental period, growth, uniformity, and survival data were subjected to analyses of variance and significance. Manipulation of the photoperiod showed no change in variables because there was no difference in the growth, uniformity, or survival of severum larvae. Thus, for larvae of this species of up to 20 days of age, the manipulation of the photoperiod is not advantageous due to the possible increase in production costs. Therefore, it is recommended to use the photoperiod close to the natural environment. |
| format |
Artigo |
| author |
VERAS, Galileu Crovatto |
| author2 |
PAIXÃO, Daércio José de Macedo Ribeiro BRABO, Marcos Ferreira SOARES, Lourdes Marília Oliveira SALES, Abner Dias |
| author2Str |
PAIXÃO, Daércio José de Macedo Ribeiro BRABO, Marcos Ferreira SOARES, Lourdes Marília Oliveira SALES, Abner Dias |
| title |
Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840) |
| title_short |
Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840) |
| title_full |
Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840) |
| title_fullStr |
Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840) |
| title_full_unstemmed |
Influence of photoperiod on growth, uniformity, and survival of larvae of the Amazonian ornamental Heros severus (Heckel, 1840) |
| title_sort |
influence of photoperiod on growth, uniformity, and survival of larvae of the amazonian ornamental heros severus (heckel, 1840) |
| publisher |
Universidade Federal do Pará |
| publishDate |
2018 |
| url |
http://repositorio.ufpa.br/jspui/handle/2011/9963 http://dx.doi.org/10.1590/S1806-92902016000700010 |
| _version_ |
1832602294066085888 |
| score |
11.755432 |