Efeito da temperatura e do fotoperíodo sobre o desenvolvimento do aparelho reprodutor de rã-touro (Rana catesbeiana Shaw, 1802)

Figueiredo, Mario Roberto Chim; Lima, Sergio Monteiro; Agostinho, Cláudio Ângelo; Baêta, Fernando da Costa

doi:10.1590/s1516-35982001000400002

Cited by 8 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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. The influence of seasonal change on the behavior and physiology of organisms is a widespread phenomenon, and photoperiod is the most reliable predictor of these changes (Vaze and Sharma 2013).…”

Section: Discussionmentioning

confidence: 97%

“…The effect of rainfall on bullfrog reproductive activity was not recorded in our study, probably because precipitation is evenly distributed throughout the year in subtropical Brazil. According to Figueiredo et al (2001), body fat increases with temperature, indicating the preparation of animals for energy expenditure involved in reproduction. As observed here, this preparation is mainly associated with photoperiod, since seasons with higher temperatures also have the longest photoperiods.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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.

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

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.

View full text Add to dashboard Cite

show abstract

“…Figueiredo et al [31] already have observed the better performance parameters in bullfrogs weighing more than 100 g at temperature between 27.6 and 28.2°C. The environmental temperature also affected the adipose and hepatic tissue weights, presenting the higher values at temperatures of 27.27 and 26.81°C, respectively [32].…”

Section: Factors Regulating the Animal Growthmentioning

confidence: 99%

Morphometric Growth Characteristics and Body Composition of Fish and Amphibians

Mansano¹,

Macente²,

Khan³

et al. 2017

New Insights Into Morphometry Studies

View full text Add to dashboard Cite

Describing animal growth through the nonlinear models allows a detailed evaluation of their behavior, besides revealing important information of the response to a particular treatment. In this chapter, the parameters of mathematical models (Gompertz, Von Bertalanffy, Logistic and Brody) for live weight, feed and protein intakes, total and standard lengths and nutrient deposition are described systematically and comprehensively. Also the relative growth and allometric coefficients of body components in relation to body weight of fish and amphibians are described, explaining better the use of the allometric equation and classifying the growth of the body components.

show abstract

“…However, bullfrog development is significantly reduced in colder regions (Weigert et al, ), as low temperatures have been shown to directly affect gonadotropin secretion by the pituitary gland in most Anura species, changing the sensitivity of the germinal epithelium to gonadotropic hormones (Figueiredo et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…The effects that temperature and season (which may or may not depend on the effects of temperature) have on the metabolic and sexual activities of amphibians seem to be related to endocrine changes and the possible overlap between these changes and the biological rhythms of the organism (Figueiredo et al, ).…”

Section: Introductionmentioning

confidence: 99%

Ultrastructure of the bullfrog (Lithobates catesbeianus‐Shaw, 1802) oviduct in different seasons

Fernàndez

Rodrigues

Rici

et al. 2013

Microscopy Res & Technique

View full text Add to dashboard Cite

The bullfrog (Lithobates catesbeianus) is an exotic animal that adapted perfectly to the climatic conditions of Brazil after introduction in the country. These climatic conditions favor the reproduction and fattening of bullfrogs. However, the development of the bullfrog is significantly reduced in colder regions because low temperatures affect the secretion of gonadotropins and change the sensitivity of the germinal epithelium to gonadotropic hormones. Thus, the temperature and photoperiod are abiotic factors that influence the life cycle of this species, especially with regard to reproduction. Samples from different regions of the oviducts (the infundibulum, magnum, and isthmus) of 9 bullfrogs were collected in the different seasons of the year. The samples were fixed and processed for analysis with scanning and transmission electron microscopy. A comparison of the morphology of the oviducts collected during different seasonal periods suggests that the frogs have greater reproductive potential in the spring due to the development of the structures related to the oviduct, presence of developed cilia, and electron-dense granules. However, seasonal changes were noted in the animal throughout the year in preparation for reproduction during the spring and summer.

show abstract

Efeito da temperatura e do fotoperíodo sobre o desenvolvimento do aparelho reprodutor de rã-touro (Rana catesbeiana Shaw, 1802)

Cited by 8 publications

References 9 publications

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

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

Morphometric Growth Characteristics and Body Composition of Fish and Amphibians

Ultrastructure of the bullfrog (Lithobates catesbeianus‐Shaw, 1802) oviduct in different seasons

Contact Info

Product

Resources

About