Reproductive cycles of two island pitvipers species (Serpentes, Viperidae) determined by ultrasonography and radiography

IF 0.8 4区农林科学 Q4 ANATOMY & MORPHOLOGY Anatomia Histologia Embryologia Pub Date : 2024-04-02 DOI:10.1111/ahe.13038

Viviane Campos Garcia, Selma Maria Almeida-Santos

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Abstract

We used ultrasonography and radiography to assess the sexual organs and characterize the reproductive cycle of captive golden lancehead (Bothrops insularis) and Alcatrazes lancehead (B. alcatraz), two endangered island snake species in Brazil. We assessed 46- individuals of golden lancehead and 12 of Alcatrazes lancehead kept in captivity between 2014 and 2020. Follicular development was similar between species, but follicles in Alcatrazes lancehead were smaller than in the golden lanceheads. Female golden lanceheads produced 24 live young, seven stillborn and 73 undeveloped eggs. Parturition of live young occurred between midsummer (February) and early autumn and gestation averaged 8 months. Female Alcatrazes lanceheads produced four live young in midsummer, and one undeveloped egg in early autumn. Males and females of both species have seasonal and biennial reproductive cycles. Sperm storage in both sexes is essential to coordinate male and female cycles. The data obtained with golden lancehead and Alcatrazes lancehead in captivity, demonstrate a degree of conservatism, following data from other Bothrops.

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通过超声波和放射摄影确定两种岛屿蝮蛇（蛇类，蝰科）的繁殖周期。

我们使用超声波和放射成像技术评估了巴西两种濒危岛屿蛇类--人工饲养的金枪蛇（Bothrops insularis）和恶魔岛蛇（B. alcatraz）的性器官，并描述了它们的繁殖周期。我们对 2014 年至 2020 年间人工饲养的 46 条金长枪蛇和 12 条阿尔卡特拉兹长枪蛇进行了评估。不同物种的卵泡发育情况相似，但恶魔岛长枪鱼的卵泡比黄金长枪鱼的小。雌性金枪鱼产下了 24 只活幼鱼、7 只死胎和 73 枚未发育的卵。活体幼鱼的产卵期为仲夏（二月）至初秋，妊娠期平均为 8 个月。雌性阿尔卡特拉泽长枪鱼在仲夏产下 4 只活幼鱼，在初秋产下 1 枚未发育的卵。两种鱼的雌雄繁殖周期都是季节性的，也有两年一次的。雌雄的精子储存对协调雌雄周期至关重要。在人工饲养金枪鱼和阿尔卡特拉兹金枪鱼过程中获得的数据显示了一定程度的保守性，这与其他两栖类的数据相同。

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来源期刊

Anatomia Histologia Embryologia ANATOMY & MORPHOLOGY-VETERINARY SCIENCES

CiteScore

1.90

自引率

11.10%

发文量

115

审稿时长

18-36 weeks

期刊介绍： Anatomia, Histologia, Embryologia is a premier international forum for the latest research on descriptive, applied and clinical anatomy, histology, embryology, and related fields. Special emphasis is placed on the links between animal morphology and veterinary and experimental medicine, consequently studies on clinically relevant species will be given priority. The editors welcome papers on medical imaging and anatomical techniques. The journal is of vital interest to clinicians, zoologists, obstetricians, and researchers working in biotechnology. Contributions include reviews, original research articles, short communications and book reviews.