Ecology of Bothrops neuwiedi pauloensis (Serpentes: Viperidae: Crotalinae) in the Brazilian Cerrado

Valdujo, Paula Hanna; Nogueira, Cristiano de Campos; Martins, Marcio Roberto

doi:10.1670/0022-1511(2002)036[0169:eobnps]2.0.co;2

Cited by 70 publications

(68 citation statements)

References 16 publications

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“…Therefore, it is possible that in the southernmost regions of Brazil, the peak reproductive activity occurs during the warmer months of the year, avoiding the relatively low winter temperatures. Furthermore, it is suggested that the seasonal cycle of reproduction favors the synchrony between the birth of the newborns and the period with the highest prey offering (Marques et al 2001, Valdujo et al 2002.…”

Section: Discussionmentioning

confidence: 99%

“…The concentration of the reproductive peak at certain times of the year would increase the survival rate of offspring, for example, by providing synchrony between the births and periods with a higher food supply (Marques et al 2001, Valdujo et al 2002. In addition, the relatively low winter temperatures (frequently close to 0°C) in the subtemperate regions of southern Brazil would restrict any continuous reproduction patterns in the resident snake species.…”

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confidence: 99%

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Reproductive biology of Thamnodynastes hypoconia (Serpentes: Dipsadidae) in Brazilian subtemperate wetlands

Rebelato

Pontes

Tozetti

2016

An. Acad. Bras. Ciênc.

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This study aimed to describe the reproductive biology of populations of Thamnodynastes hypoconia in subtemperate wetlands based on macroscopic analyses of their gonads. We analyzed 101 specimens from the southernmost regions of Brazil. The males had a greater snout-vent length, but the females reached sexual maturity with a greater body size. The reproductive cycle of the females was seasonal, with secondary vitellogenesis occurring between the winter and spring (May-October). Based on macroscopic analysis of gonads, data suggests that males have a continuous reproductive cycle. Parturition occurs between the late summer and early fall (January-April). The clutch size ranged between 4 and 16 embryos and showed no relationship with the female's body size. The recorded reproductive frequency of T. hypoconia is low (38 %) compared to other phylogenetically related species. Conversely, the studied populations appear to have a high reproductive success because it is an abundant species in the study site.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Reproductive biology of Thamnodynastes hypoconia (Serpentes: Dipsadidae) in Brazilian subtemperate wetlands

Rebelato

Pontes

Tozetti

2016

An. Acad. Bras. Ciênc.

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“…RUFINO & BERNARDI (1999) reported one case of predation of a velvety free-tailed bat (Molossus molossus (Pallas, 1766)) by the large colubrid Pseustes sulphureus (Wagler, 1824) in the state of Pará, northern Brazil. VALDUJO et al (2002) examined the stomachs of 175 specimens of the viperid snake Bothrops pauloensis Amaral, 1925(formerly B. neuwiedii pauloensis Amaral, 1925see SILVA 2004) from the cerrados of central Brazil and found an unidentified bat in one of them.…”

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confidence: 99%

Snakes preying on bats: new records from Brazil and a review of recorded cases in the Neotropical Region

Esbérard

Vrcibradic

2007

Rev. Bras. Zool.

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ABSTRACT. Predation on bats by snakes is relatively infrequently reported in the literature, though it may actually not be an uncommon phenomenon, since bat colonies represent a potential concentration of food for many medium-sized or large snakes. Herein we describe four events of bat predation by snakes and present a review of predation records of snakes on bats in the Neotropics compiled from the literature. A total of 20 species of snakes have been recorded so far as predators of bats in the New World tropics, with boiids being represented by the greatest number of cases. Due to the semi-arboreal habits of most of its species, their large size and their usual preference for mammalian prey, the Boiidae are probably the main reptilian predators of bats in the Neotropics, though predation by colubrids may also be relatively frequent. Two types of predatory events can be pointed out: (1) on active bats outside refuges or exiting them, and (2) on animals (active or inactive) inside refuges. The former strategy is apparently used mainly by boiids, whereas the latter strategy appears to be the one most used by large colubrids.

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“…are usually longer and have larger heads than males (e.g., Nogueira et al 2003;Marques et al 2013), indicating that such dimorphism develops during ontogeny, probably due to different growth trajectories (see Furtado et al 2006). We found that the tail is longer in neonate males than in females, which has also been observed in neonates of species of the B. neuwiedi complex (Xavier 2002), and in adult snakes, including the genus Bothrops (Valdujo et al 2002;Nogueira et al 2003). Although the exact cause of the evolution of longer tails in males remains unclear (Shine et al 1999), this finding is often related to the need to accommodate hemipenes and retractor muscles present in males (King 1989).…”

Section: Discussionsupporting

confidence: 72%

<b>Biologia reprodutiva da jararaca da Amazônia, <i>Bothrops atrox</i> (Serpente: Viperidae)</b>

Silva¹

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DEDICATÓRIA AGRADECIMENTOSÀ minha orientadora Selma M. de Almeida-Santos. Obrigada Selma por me acolher ainda na iniciação, sou muito grata a você por ter me ajudado a realizar esse sonho e por acreditar em mim, pelo apoio e incentivo em todos os momentos. E também pelo exemplo de carinho e preocupação com todos nós do grupo de reprodução.Ao Otavio A. V. Marques pela parceria e apoio, sem sua ajuda a viagem ao Pará seria muito difícil. Obrigada Otávio!!! Ao Ricardo J. Sawaya, pela sua atenção e acolhimento quando ainda eu apenas buscava informações e bibliografias para o meu trabalho de reprodução em cativeiro com serpentes. Obrigada Ricardo por apresentar a Selma, a partir desse momento a minha vida mudou.À Leticia Ruiz Sueiro por me ensinar a dissecar e coletar dados da biologia reprodutiva de serpentes e pelos seus brilhantes conselhos. Bothrops atrox is a snake of large ecological importance due to its wide geographic distribution in the vast and diversified Amazonian habitat. Information about the reproductive biology of B. atrox are scarce and punctual, with most information derived from snakes kept in captivity. Thus, this paper aimed to describe the reproductive cycle of B. atrox, as well as reproductive strategies related to this cycle as: maturity and sexual dimorphism, fecundity, sperm storage, and the hypertrophy of sexual segment of the kidney in males. Moreover, this work also aimed to relate such strategies with environmental conditions (temperature and precipitation). For that, it were examined 325 specimens of B. atrox, being males and females (mature and immature) from the Brazilian Amazon, preserved in nine herpetological collections. Results showed some differences related to sexual dimorphism: neonates males had the coloration of the tail tip yellow, whereas females showed the tail tip with dark coloration. It was also observed that neonate males had dark pigmentation in the throat region, whereas neonate females showed lighter coloration. Adult females were significantly larger than males, and attained sexual maturity at larger body sizes than males. Vitellogenesis was seasonal (January to August), however, there was no synchrony between the occurrence of pregnant females and birth periods. Thus, the extent observed in the female reproductive cycle was possible due to the sperm storage, since mating is seasonal. Male reproductive cycle was discontinuous, seasonal semi-synchronous. Sperm production occurred throughout the year, however, spermiogenesis was observed mainly in the beginning of the rainy season (BRS) and testicular regression in the beginning of the dry season (BRS). Sperm storage in the ductus deferens was observed during all months of the year and the sexual segment of the kidney presented hypertrophy in BRS and in the end of the rainy season (ERS), thus synchronized with spermiogenesis. Therefore, environmental conditions (temperature and rainfall) were essential in determining the type of reproductive cycle of B. atrox. Pregnant females were found during several months o...

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Ecology of Bothrops neuwiedi pauloensis (Serpentes: Viperidae: Crotalinae) in the Brazilian Cerrado

Cited by 70 publications

References 16 publications

Reproductive biology of Thamnodynastes hypoconia (Serpentes: Dipsadidae) in Brazilian subtemperate wetlands

Reproductive biology of Thamnodynastes hypoconia (Serpentes: Dipsadidae) in Brazilian subtemperate wetlands

Snakes preying on bats: new records from Brazil and a review of recorded cases in the Neotropical Region

<b>Biologia reprodutiva da jararaca da Amazônia, <i>Bothrops atrox</i> (Serpente: Viperidae)</b>

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