Intrinsic Factors Associated with Dietary Toxin Quantity and Concentration in the Nuchal Glands of a Natricine Snake Rhabdophis Tigrinus
Intrinsic Factors Associated with Dietary Toxin Quantity and Concentration in the Nuchal Glands of a Natricine Snake Rhabdophis Tigrinus
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与虎纹蛇颈项腺膳食毒素数量和浓度相关的内在因素
DOI：
10.1007/s10886-023-01415-4
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Mori Naoki
中科院分区：
文献类型：
--
作者：
Inoue Takato;Mori Akira;Yoshinaga Naoko;Mori Naoki
虎斑游蛇从蟾蜍体内吸收强心类固醇蟾蜍二烯内酯（BD），并将其储存在颈部腺体中作为防御毒素。以前已经表明，有个别差异的总数量的BD储存在nuchal腺体的adultR。tigrinus和R.虎斑蝶属表现出地理变异。然而，以前的研究没有检查BD总量占体重的百分比（相对BD量）和颈部腺液中BD的浓度（BD腺浓度）。此外，与相对BD量和BD浓度相关的内在因素尚未在单个群体中进行检查。我们从5月至10月收集了158条日本中部地区的成年蛇，并通过UV分析对其BD量进行了分析。我们评估了BD量、相对BD量和BD腺浓度的个体差异。结果表明：（1）在158只个体中，约有60%的个体的BD腺浓度大于50%，（2）相对BD量和BD腺浓度与体长和体况呈正相关，（3）即使在同一种群中，BD量的个体差异也很大，雌性个体差异大于雄性个体;（4）妊娠期雌鱼的BD相对数量和BD腺浓度均低于非妊娠期。
The snakeRhabdophis tigrinussequesters cardiotonic steroids, bufadienolides (BDs), from ingested toads and stores them in the nuchal glands as defensive toxins. It has previously been shown that there are individual differences in the total quantity of BDs stored in the nuchal glands of adultR. tigrinusand that BD quantities and profiles ofR. tigrinusexhibit geographic variation. However, no previous study has examined the total quantity of BDs as a percentage of body mass (relative BD quantity) and the concentration of BDs in the nuchal gland fluid (BD gland concentration). In addition, intrinsic factors that are associated with relative BD quantity and BD concentration have not been examined within a single population. We collected 158 adult snakes from an area of central Japan from May to October and analyzed their BD quantities by UV analysis. We assessed individual differences in BD quantity, relative BD quantity and BD gland concentration. We found that 1) in approximately 60% of the 158 individuals, the BD gland concentration was greater than 50%; 2) body length and body condition are positively correlated with relative BD quantity and BD gland concentration; 3) even in a single population, individual differences of BD quantity are large, and are greater in females than in males; and 4) relative BD quantity and BD gland concentration of females during the gestation season are lower than those during the non-gestation season.
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作者：
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影响因子：
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作者：
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DOI：
--
发表时间：
1992
期刊：
--
影响因子：
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作者：
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