Contribuição à biologia de serpentes da Bahia, Brasil: I. vivíparas

Lira-da-Silva, Rejâne Maria; Casais-e-Silva, Luciana Lyra; Queiroz, Ilka Biondi de; Nunes, Tânia Brazil

doi:10.1590/s0101-81751994000200002

Cited by 8 publications

(9 citation statements)

References 5 publications

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“…The reproductive cycle of mature females was determined by comparing the length of the largest ovarian follicle or oviductal embryo at different times of the year. Records of mating and parturition in captivity were also incorporated to complete the cycle [5,15]. Female oviduct ( = 8) was histologically examined to look for the presence of sperm.…”

Section: Methodsmentioning

confidence: 99%

“…Previous reports of B. erythromelas reproduction are anecdotal. Mating was observed in autumn (April and May) and births were observed in summer (January and February) in captivity [5,15]. The aim of this study is to describe the reproductive biology of B. erythromelas, considering male and female reproductive cycles, sperm storage, sexual maturity, and dimorphism.…”

Section: Introductionmentioning

confidence: 99%

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Reproductive Biology of Bothrops erythromelas from the Brazilian Caatinga

Barros

Rojas

Almeida‐Santos

2014

Advances in Zoology

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The reproductive biology ofBothrops erythromelas, a small pit viper from the Caatinga, a semiarid biome in Brazil, is described based on analysis of individuals deposited in zoological collections. Males are smaller and also attain sexual maturity at a smaller size than females. Female reproductive cycle is seasonal with an extended period of secondary vitellogenesis and births occurring in a restricted period from late spring to early summer. Sperm storage in females may probably occur in infundibular tubular glands and uterine muscular twisting (UMT), which is a polymorphic condition withinB. erythromelas. Seasonal spermatogenesis in males is variable with some intraspecific variation regarding the male reproductive stage per season. Most males are reproductively active during spring/summer and reproductively quiescent during autumn/winter, although some individuals vary (e.g., show testicular spermatogenesis and active sexual segment of the kidneys (SSK) during winter). The SSK could be identified in every male. Most males showed highly hypertrophied SSK in spring/summer and moderately hypertrophied SSK in autumn/winter. The ampulla ductus deferentis was observed and histochemical reactions were conducted. We discuss the probable influence of the unique environmental conditions of the Caatinga region and phylogenetic inertia in the reproductive patterns of this snake species.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reproductive Biology of Bothrops erythromelas from the Brazilian Caatinga

Barros

Rojas

Almeida‐Santos

2014

Advances in Zoology

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“…The reproductive aspects of some viviparous species from Bahia (Brazil), including B. erythromelas, was investigated by Lira-da-Silva et al (14) . The researchers observed that the gestation period of B. erythromelas was about 123 days and that parturition occurred preferably in the summer season.…”

Section: Overview On Bothrops Erythromelas Venommentioning

confidence: 99%

An overview of Bothrops erythromelas venom

Néry

Luna

Fernandes

et al. 2016

Rev. Soc. Bras. Med. Trop.

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This review discusses studies on the venom of Bothrops erythromelas published over the past 36 years. During this period, many contributions have been made to understand the venomous snake, its venom, and its experimental and clinical effects better. The following chronological overview is based on 29 articles that were published between 1979 and 2015, with emphasis on diverse areas. The complexity of this task demands an integration of multidisciplinary research tools to study toxinology. This science is in need of renewed conceptual and experimental platforms aimed at obtaining a profound understanding of the highly complex pathophysiology of snakebite envenoming and toxins isolated from snakes.

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“…atrox complex': B. atrox (this study), B. asper (Burger & Smith 1950;, and B. leucurus (Lira-da-Silva et al 1994;Lira-da-Silva 2009). Neonate males of all these species have in common the tail tip paler than the rest of the body, whereas tail tip coloration in females is similar to the body coloration (Burger & Smith 1950;Lira-da-Silva et al 1994;Lira-da-Silva 2009). However, pale tail tip seemingly occur in all neonates of B. moojeni (Leloup 1975), another representative of the group.…”

Section: Discussionmentioning

confidence: 60%

“…For instance, male and female neonates of the terciopelo Bothrops asper and of the whitetail lancehead B. leucurus vary in tail tip coloration. In both species, neonate males have pale (yellowish, whitish) tail tips, whereas females lack the pale tail tip (Burger & Smith 1950;Lira-da-Silva et al 1994;Lira-da-Silva 2009). The same dichromatism was also reported in the Amazonian lancehead B. atrox (Hoge & Federsoni 1976/77).…”

Section: Introductionmentioning

confidence: 99%

<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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Contribuição à biologia de serpentes da Bahia, Brasil: I. vivíparas

Cited by 8 publications

References 5 publications

Reproductive Biology of Bothrops erythromelas from the Brazilian Caatinga

Reproductive Biology of Bothrops erythromelas from the Brazilian Caatinga

An overview of Bothrops erythromelas venom

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

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