Density Effects on the Survival, Growth Rate, and Metamorphosis of Rana Tigrina Tadpoles

Dash, M. C.; Hota, Ashok Kumar

doi:10.2307/1936818

Cited by 92 publications

(54 citation statements)

References 12 publications

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“…In addition, stocking density is also an important factor in tadpole stage (Martínez et al, 1996). Focus in this spotlight is, for example, the reported by Dash and Hota (1980), who studied density effects on the survival, growth rate, and metamorphosis size of R. tigrina tadpoles. As well as found that survival during larval period was independent of initial population density.…”

Section: Introductionmentioning

confidence: 99%

Growth and Metabolic Effects of Stocking Density in Bullfrog Tadpoles (Rana catesbeiana) under Greenhouse Conditions

Munguia-Fragozo¹,

Alatorre-Jácome²,

Aguirre‐Becerra³

et al. 2015

IJAB

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The density-dependents and physiological effects in bullfrog tadpoles (Rana catesbeiana Shaw, 1802) was evaluated to asses optimum stocking density. During 70 days, five treatments (1/4, 1/3, 1/2, 1 and 2 tadpole L -1 ) were evaluated under greenhouse conditions. Environmental variables, water quality parameters, biometric data, oxygen consumption and nitrogen excretion were measure every 3 weeks. At the end of experiment, the treatment of 1/4 tadpole L -1 obtained the highest weight, length and biomass. However, maximum survival (92.59%) and estimated final biomass (0.3051 g L . We suggest a stocking density of 1 tadpole per 3 L in order to minimize stress and optimize water.

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Section: Introductionmentioning

confidence: 99%

Growth and Metabolic Effects of Stocking Density in Bullfrog Tadpoles (Rana catesbeiana) under Greenhouse Conditions

Munguia-Fragozo¹,

Alatorre-Jácome²,

Aguirre‐Becerra³

et al. 2015

IJAB

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“…Esse fato é de difícil explicação, visto que os estudos sobre o fenô-meno atribuem sua ocorrência, em altas densidades, à competição alimentar (Dash & Hota, 1980) ou a fatores comportamentais, como fatores químicos liberados por indivíduos dominantes, para inibir o crescimento dos submissos (Justo et al, 1985), conforme ocorre em algumas espécies de peixes (Barbosa, 1997). Volpato et al (1989) sugerem que uma das causas da variabilidade de crescimento pode ser atribuída a desvio de energia, para amenizar os efeitos do estresse da submissão.…”

Section: Resultsunclassified

“…Segundo Dash & Hota (1980), em altas densidades, a competição alimentar pode influenciar a variabilidade de crescimento em rãs. No entanto, Justo et al (1985) discordam dessa idéia e atribuem o fenô-meno a fatores comportamentais que atuam como inibidores do crescimento, pois indivíduos dominantes poderiam liberar fatores químicos para inibir o crescimento dos submissos, o que concorda com Rose (1959) e Arruda .…”

Section: Introductionunclassified

Crescimento heterogêneo de girinos de rã-touro alimentados com diferentes rações

Barbosa

Silveira²,

Gomide

2005

Pesq. agropec. bras.

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Resumo -Este trabalho teve por objetivo avaliar o efeito de três rações experimentais com diferentes níveis protéicos (33,6%, 26,6% e 22,5%), comparadas a uma ração comercial (46,5%), no desempenho e crescimento heterogêneo de girinos de rã-touro (Rana catesbeiana). Os girinos foram mantidos, durante três meses, em caixas de amianto abastecidas com 1.000 L de água corrente, na densidade de 1 girino L -1. Os girinos foram alimentados, diariamente, com duas porções iguais ad libitum e foram submetidos, quinzenalmente, à pesagem. Os grupos alimentados com a ração com 46,5% de proteína bruta mostraram maior ganho médio de peso, porém apresentaram crescimento heterogêneo mais elevado, e alguns indivíduos apresentaram deformações nos membros (27% no início da metamorfose e 5% no final). Os girinos que utilizaram as rações com 33,6% e 26,6% de proteína bruta tiveram desenvolvimento similar entre si, menor crescimento heterogêneo e não apresentaram deformações, o que demonstra que essas rações são mais adequadas do que a primeira. A ração com 22,5% de proteína bruta mostrou-se inadequada às necessidades dos girinos, o que provocou a exclusão dessa condição, antes do término do experimento, a fim de preservar o bem estar dos animais.Termos para indexação: Rana catesbeiana, nutrição animal, proteína bruta. Heterogeneous growth of bullfrog tadpoles fed with different dietsAbstract -This work tested the performance and growth variability (heterogeneous growth) of Rana catesbeiana tadpoles fed with isocaloric food constituted of four levels of crude protein: three experimental levels (33.6%, 26.6% and 22.5%), and one commercial feed (46.5%). The tadpoles were kept, during three months, in containers with capacity for 1,000 L supplied with running water at density of one tadpole L -1 . The tadpoles were fed twice a day with ad libitum portions, and submitted to the body weight records every fifteen days. The group fed with commercial food (46.5% crude protein) showed better biomassa performance, however the heterogeneous growth was elevated, with body member's deformations in some individuals (27% of tadpoles of the total tadpoleinitiated metamorphosis, and 5% at the end). Tadpoles fed with 33.6% and 26.6% of crude protein had similar growth, less heterogeneous growth and did not show body deformations, indicating that these protein concentration might be more adequate than the commercial one. Food with 22.5% of crude protein showed to be inadequate for the nutritional needing of the tadpoles, so it was excluded from the experiment, in order to preserve the animals from injury and death.

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“…For example, in amphibians, density-dependent effects on the survival, growth rate, and metaphosis of Rana tigrina tadpoles were observed (Dash and Hota, 1980). The population size of toads in Nobeyama Highland was only 112 at most, and then population density was 8.0/ha.…”

Section: Discussionmentioning

confidence: 99%

Body Size and Population Density of <i>Bufo japonicus formosus</i> from Nobeyama Highland, Nagano

Kadowaki

1996

Jpn.J.Herpetol.

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A population of the toad, Bufo japonicus formosus, was studied in Nobeyama Highland (altitude 1350m), Nagano in 1994 and 1995. Breeding activity of the toad occurred from late April through early May, and their summer activity was observed from late May through late September. The mean snout-vent length (SVL) was 94.2mm (N = 77, SD = 8.2) in males and 95.5mm (N=69, SD = 8.0) in females. The SVLs were smaller than those from lowlands. The mean body mass was 103g (N=76, SD = 25.9) in males and 104g (N=57, SD = 29.1) in females. The rate of recapture within a year was 0.333 in males and 0.320 in females, and there was no significant difference between the sexes. Population density estimated by Petersen's method was 5.9/ha, and the confidence interval (95%) was 3.9-8.0/ha.

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Density Effects on the Survival, Growth Rate, and Metamorphosis of Rana Tigrina Tadpoles

Cited by 92 publications

References 12 publications

Growth and Metabolic Effects of Stocking Density in Bullfrog Tadpoles (Rana catesbeiana) under Greenhouse Conditions

Growth and Metabolic Effects of Stocking Density in Bullfrog Tadpoles (Rana catesbeiana) under Greenhouse Conditions

Crescimento heterogêneo de girinos de rã-touro alimentados com diferentes rações

Body Size and Population Density of <i>Bufo japonicus formosus</i> from Nobeyama Highland, Nagano

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