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首页> 外文期刊>Chelonian conservation and biology >Population Structure and Body Size of the Suwannee Alligator Snapping Turtle (Macrochelys suwanniensis) in Northern Florida
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Population Structure and Body Size of the Suwannee Alligator Snapping Turtle (Macrochelys suwanniensis) in Northern Florida

机译：佛罗里达州北部Suwannee鳄鳄龟（Macrochelys suwanniensis）的种群结构和体型

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摘要

Macrochelys suwanniensis is a newly described species endemic to the Suwannee River drainage in the southeastern United States. We conducted a study of M. suwanniensis in the Santa Fe River (SFR), the major Florida tributary of the Suwannee River, between 2004 and 2011. We captured 109 individuals (24% immature, 44% adult female, 32% adult male). Adult males (mean straight midline carapace length [CL] = 530.7 mm, mean mass = 34.0 kg) were significantly larger than adult females (mean CL = 424.0 mm, mean mass = 17.2 kg), with a sexual size dimorphism index of 20.25 based on mean CL. The largest turtle in our study was 623 mm CL and weighed 54.4 kg. Adult females were significantly larger (CL) in the lower SFR than in the upper SFR (these reaches are separated where the river flows underground for 5 km). All adult males > 600 mm CL were captured in the lower SFR. Adult females were proportionately heavier in the upper SFR than in the lower SFR; males did not show this difference. We hypothesize that these differences in body size are related to habitat. The M. suwanniensis population in the SFR presently appears healthy, but we suggest this species requires continued protection because of vulnerability of adults to harvest.
机译：巨鳄suwanniensis是美国东南部Suwannee河排水中特有的新物种。我们在2004年至2011年之间对位于Suwannee河的主要佛罗里达支流圣菲河（SFR）中的suwanniensis进行了研究。我们捕获了109个人（未成熟的个体为24％，成年女性为44％，成年男性为32％） 。成年雄性（中线笔直中甲背长[CL] = 530.7 mm，平均质量= 34.0 kg）显着大于成年雌性（中线CL = 424.0 mm，平均质量= 17.2 kg），性别大小二态性指数为20.25平均CL。在我们的研究中，最大的乌龟为623毫米CL，重54.4千克。较低SFR的成年雌性（CL）明显高于较高SFR（这些河段被分开，河水流入地下5 km）。 CL> 600 mm CL的所有成年男性均在较低的SFR中捕获。成年女性在较高的SFR中比在较低的SFR中成比例地重。男性没有表现出这种差异。我们假设这些身体大小的差异与栖息地有关。目前，SFR中的suwanniensis种群看上去健康，但是我们建议该物种由于成年者易受伤害而需要继续保护。

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