Efeito do fotoperíodo sobre o desenvolvimento de girinos de rã-touro (Rana catesbeiana Shaw, 1802)

Bambozzi, Andrea Cecchetto; Filho, José Teixeira de Seixas; Thomaz, Luciana Almada; Oshiro, Lídia Miyako Yoshii

doi:10.1590/s1516-35982004000100001

Cited by 26 publications

(25 citation statements)

References 10 publications

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“…Evaluations that include temperature (Figueiredo et al, 1999;Tavares-Braga and Lopes-Lima, 2001), photoperiod (Bambozzi et al, 2004) and nutrition Olvera-Novoa et al, 2007) are examples of work done in this field. In addition, stocking density is also an important factor in tadpole stage (Martínez et al, 1996).…”

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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“…Alguns trabalhos abordam o efeito de certas variáveis sobre o crescimento dos girinos, como o fotoperíodo (Bambozzi et al, 2004), densidade de estocagem Hayashi et al, 2004), temperatura (Braga & Lima, 2001) e níveis protéicos Braga et al, 1998).…”

Section: Introductionunclassified

Desempenho e atividades enzimáticas em girinos de rã-touro

Filho

Oliveira

Moura³

et al. 2008

Pesq. agropec. bras.

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Performance and enzymatic activities of the bullfrog tadpolesAbstract -The objective of this study was to evaluate the performance and the digestive enzyme activity in bullfrog tadpoles, fed with commercial ration during 60 days, at the density of one tadpole per liter in 30 L boxes. The parameters measured fortnightly were: survival, length, weight, ration consumption, and amylase, lipase and trypsin activities. There larger growth of the tadpoles occurred from the 15 th to the 45 th day -20.61 mm. During the first 15 days, the tadpoles had the largest specific growth rate, 16.7% per day. From the 45 th to the 60 th day, the tadpoles had the largest weight gain, 3.98±0.73 g, the largest ration consumption, 14.40±1.14 g and the best feed conversion, 3.67:1.0±0.18. There was significant increase in enzyme activities after the 30 th day. Relationships were observed between the specific enzyme activities and the different development phases of the tadpoles.

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“…Photoperiod was the best predictor of calling activity for anuran assemblages in subtropical regions (Both et al 2008, Kaefer et al 2009, Canavero and Arim 2009. Bambozzi et al (2004) demonstrated that this variable is positively related to weight gain and metamorphosis rates of L. catesbeianus tadpoles. In addition, Figueiredo et al (2001) showed that photoperiod is responsible for reproductive organ development in this species in captivity.…”

Section: Discussionmentioning

confidence: 94%

Reproductive phenology of the American Bullfrog in subtropical Brazil: photoperiod as a main determinant of seasonal activity

Medeiros

Both

Kaefer

et al. 2016

An. Acad. Bras. Ciênc.

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The North American bullfrog Lithobates catesbeianus continues to invade ecosystems worldwide, potentially causing population declines and even extinctions. Within its native distribution, bullfrogs show prolonged reproductive seasons and high fertility. However, data on breeding biology of bullfrogs ex-situ in invaded localities mainly comes from anecdotal reports. Understanding how invasive species are adjusting their life histories to new colonized environments is important for conservation purposes. Here we describe temporal and spatial abundance, calling activity, spawning and tadpole distribution of bullfrogs in southern Brazil. Eighteen samplings occurred during one year. The abundance of individuals was positively related to longer photoperiods and higher temperatures. Reproductive activity was also positively associated with longer photoperiods. Calling sites, spawning and tadpoles were associated with microhabitats presenting hydrophytes, which may provide shelter and thermal stability to bullfrogs. The reproductive seasonal activity of bullfrogs can be highly variable across its growing geographical range, but in subtropical Brazil it is associated with photoperiod, a highly predictable abiotic determinant. In our study area, bullfrogs presented a breeding season twice as long as that observed in some native localities. We suggest that management strategies directed to bullfrog populations must consider the habitat structures and seasonal regimes determined by each invaded environment.

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Efeito do fotoperíodo sobre o desenvolvimento de girinos de rã-touro (Rana catesbeiana Shaw, 1802)

Cited by 26 publications

References 10 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

Desempenho e atividades enzimáticas em girinos de rã-touro

Reproductive phenology of the American Bullfrog in subtropical Brazil: photoperiod as a main determinant of seasonal activity

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