Influência da Temperatura Ambiente no Desempenho da Rã-touro, Rana catesbeiana (Shaw, 1802) na Fase de Recria

Braga, Luís Gustavo Tavares; Lima, Sergio Monteiro

doi:10.1590/s1516-35982001000700001

Cited by 25 publications

(27 citation statements)

References 9 publications

(7 reference statements)

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“…Regarding the weight range of frogs in pens 5 and 6 of the present study, whose initial weight was 65.95 and 110.84, and a final weight of 123.92 and 155 grams, the feed conversion ratio was higher than that found by the above cited authors, respectively, 1.07: 1 and 1.1: 1; this is despite the negative factor relative to the mean water temperature, i.e., during the experiment, the mean temperature was 22.8 ºC. Braga and Lima (2001) verified the values of the feed conversion ratio between 1.40: 1 and 1.46: 1, with temperatures between 20 and 30 ºC, for 35 days of the study, and for frogs with an initial mean weight of 37.5 grams and final mean weight of 83.5 grams. The worst conversion in this study was verified for the frogs from pen 4, which at the beginning of monitoring had a mean weight of 335.70 grams a weight above the standard of animals for slaughter.…”

Section: Performance Of the Bullfrog (Lithobathes Catesbeianus) Rearecontrasting

confidence: 73%

“…Figueiredo et al (1999) stated optimum values as those between 27.6 and 30.1 ºC. Braga and Lima (2001) observed better performances between 25 and 30 ºC.…”

Section: Results Of Daily Monitoring the Ph Temperature Total Ammonmentioning

confidence: 94%

“…Lima, Casali and Agostinho (2003) observed in the three commercial frog farms with the "amphifarm" system, mortality rates were from 0.5 to 39.5%, with an average of 12%, higher than found in the present study. Braga and Lima (2001) registered values from 10 to 14% in experimental pens based on the "amphifarm" system, and Mello (2001) verified 37.4% in a wet system. Table 3 presents the mean values and standard deviations of pH, temperature, total ammonia and NH 3 obtained at the three sampling points: central collector box, anaerobic biofilter outlet, and aerobic biofilter outlet.…”

Section: Performance Of the Bullfrog (Lithobathes Catesbeianus) Rearementioning

confidence: 94%

“…Stands out the results of animals that at the onset of monitoring were within the weight range of animals of growing and fattening phases, thus commercially considered as animals for slaughter, with values of daily weight gain between 0.79 and 1.41 (pens 2, 5 and 6). Braga and Lima (2001) reached values of mean daily weight gain of 0.92 g at 20 ºC; 1.46 g at 25 ºC; and 1.40 g at 30 ºC. Sousa et al (2010) studied the performance of bullfrogs stocked in cages installed in tilapia ponds and fed with automatic dispensers for 60 days in the winter under a mean temperature of 18.1 ºC.…”

Section: Performance Of the Bullfrog (Lithobathes Catesbeianus) Rearementioning

confidence: 99%

“…The basic rearing technique involved confinement, intensive feeding, strict hygiene practices and close supervision (Teixeira;Mello;Lima, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Development of a water recirculating system for bullfrog production: technological innovation for small farmers

et al. 2016

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Despite the technological progress in frog farming, issues related to the environment, biosafety, and the use of technologies that minimise environmental impacts are frequently neglected by farmers. With the goal of developing a low-cost technology for reuse and preservation of water quality, an anaerobic filtering system combined with an aerobic filtering system was implemented in the grow-out sector in the Frog Culture Research Unit at Fundação Instituto de Pesca do Estado do Rio de Janeiro (FIPERJ). The filtering system received the effluent from six pens of frogs that were populated with 362 frogs in different development phases. The efficiency of the filtering system was evaluated by an analysis of the water before and after passing through the filters. In addition to the standards of water quality, the animals' performance was also observed through monitoring rates of survival, weight gain and feed conversion ratio. The results showed the effectiveness of the filtering system by removing organic matter, on average 87%. The values of total ammonia and non-ionisable reached 1.04 and 0.004 mg/L, respectively. Also, frogs subjected to the system presented satisfactory rates of weight gain and a high survival rate (97%).Index terms: Frog farming; effluent treatment; environmental preservation; local development. RESUMOApesar da evolução tecnológica da ranicultura, ainda é possível perceber que as questões voltadas para o meio ambiente, biossegurança e emprego de tecnologias que reduzam o impacto ambiental, são frequentemente ignoradas pelos criadores. Com o objetivo de desenvolver uma tecnologia de baixo custo para reuso e preservação da água foi implantado um sistema de filtragem anaeróbia, acoplado à filtragem aeróbia, no setor de engorda inundado do ranário experimental da Fundação Instituto de Pesca do Rio de Janeiro (FIPERJ). O sistema de filtragem recebeu o efluente de seis baias de engorda. A eficiência do sistema foi avaliada, por meio da análise da água antes e depois da passagem nos filtros. Além dos padrões de qualidade da água foi observado o desempenho dos animais, por meio das taxas de sobrevivência, ganho de peso e conversão alimentar. Os resultados obtidos evidenciaram a eficiência do sistema, em média foram removidos 87% da matéria orgânica. Os valores médios de amônia total e amônia não ionizável, após a filtragem aeróbia, foram respectivamente 1.04 e 0.004 mg/L. Conclui-se, ainda, que as rãs submetidas ao sistema apresentaram taxas satisfatórias de ganho de peso, conversão alimentar e sobrevivência (97%).Termos para indexação: Ranicultura; tratamento de efluente; preservação do ambiente; desenvolvimento local.

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Section: Performance Of the Bullfrog (Lithobathes Catesbeianus) Rearecontrasting

confidence: 73%

“…Figueiredo et al (1999) stated optimum values as those between 27.6 and 30.1 ºC. Braga and Lima (2001) observed better performances between 25 and 30 ºC.…”

Section: Results Of Daily Monitoring the Ph Temperature Total Ammonmentioning

confidence: 94%

Section: Performance Of the Bullfrog (Lithobathes Catesbeianus) Rearementioning

confidence: 94%

Section: Performance Of the Bullfrog (Lithobathes Catesbeianus) Rearementioning

confidence: 99%

“…The basic rearing technique involved confinement, intensive feeding, strict hygiene practices and close supervision (Teixeira;Mello;Lima, 2001).…”

Section: Introductionmentioning

confidence: 99%

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Development of a water recirculating system for bullfrog production: technological innovation for small farmers

et al. 2016

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Effect of Two Levels of Temperature and Natural and Artificial Photoperiod on Growth and Metamorphosis of Bullfrog Tadpoles in an Intensive Rearing System

et al. 2018

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The effect of two levels of temperature and natural and artificial photoperiods on the growth and metamorphosis of tadpoles of the American bullfrog Rana catesbeiana were evaluated in an intensive‐rearing culture environment. Four groups of tadpoles at Gosner stage 24–25 were subjected for 50 d to four different treatments: (1) Tadpole culture with temperature control system (25.9 ± 0.34°C) and natural photoperiod of 12.25 h light : 11.75 h dark (treatment T), (2) an artificial photoperiod of 10 h light : 14 h dark using a white LED lamp and no temperature control system (18.7 ± 1°C) (treatment P), (3) the combination of temperature control system (26.01 ± 0.44°C) and an artificial photoperiod (10 h light : 14 h dark) (treatment T/P), and (4) culture with no temperature control system (21.87 ± 1.09°C) and a natural photoperiod (12.25 h light : 11.75 h dark) (treatment N/S). The experiment was performed under greenhouse conditions. Tadpoles in treatments T and T/P had the best growth performance as measured by total length (45.34 ± 1.89 mm [mean ± SE] for T/P, 44.72 ± 2.13 mm for T), head length (17.15 ± 0.67 mm for T/P, 18.34 ± 0.70 for T), and weight (1.00 ± 0.03 g for T/P, 1.14 ± 0.013 g for T). Tadpoles reared using white light LED lamps had reduced growth. The best results for tadpole metamorphosis were obtained in treatment T/P (25.9%), while treatment P presented the highest survival (36.2%). This experiment demonstrates that having temperature regulation is important to achieve better tadpole growth in intensive rearing systems. The regulation of both variables (T and P) is recommended for activating metamorphosis in the final phases of the tadpole development.

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Feed digestibility and productive performance of bullfrogs fed in high and low frequency

et al. 2012

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Influência da Temperatura Ambiente no Desempenho da Rã-touro, Rana catesbeiana (Shaw, 1802) na Fase de Recria

Cited by 25 publications

References 9 publications

Development of a water recirculating system for bullfrog production: technological innovation for small farmers

Development of a water recirculating system for bullfrog production: technological innovation for small farmers

Effect of Two Levels of Temperature and Natural and Artificial Photoperiod on Growth and Metamorphosis of Bullfrog Tadpoles in an Intensive Rearing System

Feed digestibility and productive performance of bullfrogs fed in high and low frequency

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