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Growth rates and age estimations of the Fuzzy Pigtoe, Pleurobema strodeanum: A species newly listed under the endangered species act

机译:模糊猪脚草(Pleurobema strodeanum)的生长速率和年龄估计:濒临灭绝物种下新列入的物种

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摘要

Pleurobema strodeanum (Fuzzy Pigtoe), is listed as threatened under the Endangered Species Act. The purpose of this study was to estimate growth rate, morphometric ratios, and ages for this species. One hundred and sixty-one P. strodeanum were originally tagged and measured in 2004 at Eightmile Creek, Walton County, FL. In 2011, 28 of those 161 were recovered and re-measured. Growth-rate percentages were determined based on length, width, height, and volume. Age was estimated using the von Bertalanffy growth equation. Results indicate that over a period of seven years, P. strodeanum grew 0.48 mm/year (SD = 0.14) in length. The age estimations in this study ranged from 48.7 to 74.5 years. The growth constant (K) was 0.018 per year, and the asymptotic length L∞) was 71.97 mm. Natural history data such as these will be useful in understanding the basic biology of P. strodeanum and may assist in successful mussel management.
机译:根据《濒危物种法》,Strodeanum(Fuzzy Pigtoe)被列为受威胁物种。这项研究的目的是估计该物种的生长速率,形态计量比和年龄。最初在2004年在佛罗里达州沃尔顿县的Augmile Creek标记并测量了161个Strodeanum。 2011年,在161个中,有28个被恢复并重新测量。根据长度,宽度,高度和体积确定增长率。使用冯·贝塔朗菲(von Bertalanffy)生长方程估算年龄。结果表明,在七年的时间内,Strodeanum的长度增长了0.48 mm /年(SD = 0.14)。本研究中的年龄估计范围为48.7至74.5岁。生长常数(K)为每年0.018,渐近长度L∞)为71.97 mm。诸如此类的自然历史数据将有助于理解Strodeanum的基本生物学,并可能有助于成功进行贻贝管理。

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