Oviductal Anatomy and Seasonal Sperm Storage in the Southeastern Crowned Snake (Tantilla coronata)

Aldridge, Robert D.

doi:10.2307/1446648

Cited by 42 publications

(49 citation statements)

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“…Development of ovarian follicles in Tarom's Vipera albicornuta is similar to Agkistrodon piscivorus of temperate regions [37,38]. In female viper Bothrops insularis the vitellogenesis occurs in spring and ovulation occurs in late spring [9] as Tantilla coronata from the temperate region of South America [33]. Our result revealed that in Bostanabad's V. albicornuta ovulation probably occurred between June and July and in Tarom's vipers between May and June.…”

Section: Discussionmentioning

confidence: 58%

“…Snakes with weak bodies cannot produce the good clutch during reproductive seasons like Elaphe longissima [30], Vipera aspis [31]. Body fat of viviparous cortalid is reduced during the vitellogenesis, the hibernation, and also pregnancy period and lack of nutrition [11,15,32,33]. Weight of body fat is reduced during the pregnancy and vitellogenesis in the V. albicornuta that is Advances in Biology [4].…”

Section: Discussionmentioning

confidence: 99%

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Seasonal Changes in Ovarian Follicle Growth in Iran Viper (Vipera albicornuta)

Afsharzadeh

Shiravi

Todehdehghan

2015

Advances in Biology

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The Vipera albicornuta is an economically important snake of Iran, its venom is used for antivenin production, and we need to breed the snake in the captivity. In order to know about the viper's reproductive biology, seasonal alterations in ovarian weight, morphology, and the follicles developmental stages in Vipera albicornuta were studied using macroscopic parameters and histological examination of reproductive tissues during a year. Twenty-four female vipers were collected from mountainous zone of Bostanabad, East Azerbaijan, and Tarom in Zanjan through years 2011-2012. Evaluation of the reproductive parameters of this viper is performed for the first time in Iran. Our observation revealed that vitellogenesis cycle begins in autumn and continues till early summer; ovaries and follicles are in previtellogenesis stage in autumn and vitellogenesis in winter and during spring. Weight of ovary is heaviest in spring, ovulation occurs in late spring till early summer, and copulation is prior to ovulation.

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Section: Discussionmentioning

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Seasonal Changes in Ovarian Follicle Growth in Iran Viper (Vipera albicornuta)

Afsharzadeh

Shiravi

Todehdehghan

2015

Advances in Biology

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“…Embora em algumas espécies a bolsa (vagina) tem formato compatível com a inserção do hemipênis (LUDWING; RAHN, 1943;ALMEIDA-SANTOS, 2005), e tem sido proposto que o órgão copulatório seja introduzido na bolsa durante a cópula (ALDRIDGE, 1992). O mesmo não foi observado para Spilotes, o encaixe do hemipênis na bolsa da fêmea não parece ser possível.…”

Section: Descreve Os Dois Testículos De Duas Espécies Deunclassified

Ciclo reprodutivo da caninana, Spilotes pullatus (Linnaeus, 1758) (SERPENTES: COLUBRIDAE)

Muniz-da-Silva¹

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“…Dentre essas famílias, são conhecidas duas regiões no oviduto que alojam os espermatozoides: o infundíbulo posterior, que apresenta túbulos de estocagem de espermatozoides especializados e o útero posterior (região aglandular) (FOX, 1956;HOFFMAN;WIMSATT, 1972;HALPERT;GARSTKA;CREWS, 1982;ALDRIDGE, 1992;PERKINS;PALMER, 1996;RYAN, 1999;SEVER, 2006;BARROS;. Nesta última região a estocagem ocorre em sulcos profundos ou através de uma contração uterina, denominada como uterine muscular twisting (UMT) (ALMEIDA-SANTOS; 2002 (FOX, 1956;HOFFMAN;WIMSSATT, 1972;PERKINS;PALMER, 1996;ROJAS, 2009 Para Fox (1956), os espermatozoides estocados na região do útero posterior são oriundos de um possível acasalamento recente e em um curto período seriam atraídos para o infundíbulo posterior, onde seriam maiores as chances de fertilização.…”

Section: Introductionunclassified

“…Pois na maioria das espécies de serpentes os espermatozoides na região uterina não estão associados a estruturas especializadas, são apenas encontrados no lúmen e em sulcos profundos (SEVER; RYAN, 1999). Os túbulos de estocagem de espermatozoides são encontrados apenas no infundíbulo (FOX, 1956;SAINT-GIRONS, 1957, 1962aALDRIDGE, 1992;BLACKBURN, 1998;SEVER, 2006).…”

Section: Introductionunclassified

<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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Oviductal Anatomy and Seasonal Sperm Storage in the Southeastern Crowned Snake (Tantilla coronata)

Cited by 42 publications

References 0 publications

Seasonal Changes in Ovarian Follicle Growth in Iran Viper (Vipera albicornuta)

Seasonal Changes in Ovarian Follicle Growth in Iran Viper (Vipera albicornuta)

Ciclo reprodutivo da caninana, Spilotes pullatus (Linnaeus, 1758) (SERPENTES: COLUBRIDAE)

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

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