Spatial variation in life history characteristics of waved whelk (Buccinum undatum L.) on the U.S. Mid-Atlantic continental shelf
Spatial variation in life history characteristics of waved whelk (Buccinum undatum L.) on the U.S. Mid-Atlantic continental shelf
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DOI：
10.1016/j.fishres.2017.10.006
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发表时间：
2018-02
影响因子：
2.4
通讯作者：
S. Borsetti;D. Munroe;D. Rudders;C. Dobson;E. Bochenek
中科院分区：
文献类型：
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作者：
S. Borsetti;D. Munroe;D. Rudders;C. Dobson;E. Bochenek
最近在美国中大西洋大陆架区域扩大了无管理的波浪海螺（Buccinum undatum）渔业，促使人们对当地生命史参数进行调查。有限的成年人的传播和缺乏一个admittonic幼虫阶段有可能创造空间不同的人口方面的大小性成熟和大小频率。在2015年夏天，进行了一项全面的调查，以评估人口结构，性别比例，相对丰度，以及在大西洋中部的青春痘性成熟的大小。样本（n = 228）收集从乔治银行通过DelMarVa地区使用修改后的扇贝挖掘深度范围从27.4至112米，与大多数海螺之间的40-75米，和峰值丰度在51-60米。对收集的所有青春痘（n = 3877）进行性别鉴定、称重、测量和成熟度评估。南部的性别比例偏向女性，其余地区则保持平衡。成熟的大小范围从大约56-73毫米，并在不同地区和性别。性成熟度的大小的估计。汇编了来自世界其他地区的数据，表明该鱼种成熟的大小差异很大，目前的最小上岸大小规定往往低于性成熟的估计大小，有可能增加补充过度捕捞的风险。总体而言，青春痘表型的空间变异表明在这个物种的地方适应，这表明区域管理将是最合适的。
Recent expansion of the unmanaged waved whelk (Buccinum undatum) fishery within the United States Mid-Atlantic continental shelf region has prompted investigation into local life history parameters. Limited adult dispersal and lack of a planktonic larval stage has the potential to create spatially distinct populations with respect to size of sexual maturity and size frequency. During the summer of 2015, a comprehensive survey was undertaken to evaluate population structure, sex ratio, relative abundance, and size of sexual maturity for whelk in the Mid-Atlantic. Samples (n = 228) were collected from Georges Bank through the DelMarVa region using a modified scallop dredge at depths ranging from 27.4 to 112 m, with most whelk caught between 40–75 m, and peak abundances at 51–60 m. All whelk collected (n = 3877) were sexed, weighed, measured, and assessed for maturity. Sex ratios were skewed in favor of females in the south and balanced through the rest of the regions. Size of maturity ranged from approximately 56–73 mm and varied among regions and sex. Estimates of size of sexual maturity forB. undatumfrom other regions of the world were compiled, demonstrating that the size of maturity for this species is highly variable, and current minimum landing size regulations tend to fall below the estimated size of sexual maturity, potentially increasing the risk of recruitment overfishing. Overall, spatial variation in whelk phenotype suggests local adaptation in this species, indicating that regional management would be most appropriate.