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首页> 外文期刊>ICES Journal of Marine Science >A comparison of the size at maturity of female American lobsters (Homarus americanus) over three decades and across coastal areas of the Gulf of Maine using ovarian staging
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A comparison of the size at maturity of female American lobsters (Homarus americanus) over three decades and across coastal areas of the Gulf of Maine using ovarian staging

机译：三十年来，女性龙虾（Homarus Americanus）成熟度的大小比较，卵巢分期在缅因州湾沿海地区

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摘要

The carapace length (CL) at which American lobster (Homarus americanus) females reach maturity can be used to evaluate egg production, growth patterns, and the overall health of lobster stocks. The female maturity datasets used to represent Gulf of Maine (GOM) lobsters in the 2015 Atlantic States Marine Fisheries Commission American Lobster Stock Assessment were collected in the 1990s by the Maine Department of Marine Resources at two coastal sites. Many studies have demonstrated an inverse relationship between temperature and the size at maturity in female lobsters, and GOM waters have warmed significantly over this period. To update these GOM maturity datasets, we used ovarian staging to determine the maturity status of over 1200 females from fives sites over 3 years. Broad application of this methodology in tandem with key growth measurements on females 50-120 mm CL allowed us to characterize reproductive development and generate maturity ogives (proportion mature at a given CL). We observed a latitudinal gradient in the size at maturity across this coastal region of the GOM and quantified a decrease in this size over 25 years. These findings have implications for future stock assessment approaches and management measures implemented to sustain this valuable fishery.
机译：美国龙虾（冠状法国）女性达到成熟的甲壳长度（CL）可用于评估鸡蛋生产，生长模式和龙虾股的整体健康。用于代表2015年大西洋国家海洋渔业委员会在20世纪90年代在两个沿海网站的海洋资源部门收集了2015年大西洋国家海洋渔业委员会美国龙虾股票评估的女性到期日。许多研究证明了雌性龙虾成熟度的温度和大小之间的反比关系，并且在此期间内的GOM水域已显着温暖。为了更新这些GOM成熟日期数据集，我们使用卵巢分期来确定3年超过Fives站点的1200多个女性的到期状态。这种方法在串联中的广泛应用具有对女性的关键生长测量50-120mM Cl允许我们表征生殖发育并产生成熟度Ogives（在给定CL处的比例成熟）。我们观察到GOM的这个沿海地区的成熟度的大小的纬度梯度，并在25年内量化了这一尺寸的降低。这些调查结果对未来的股票评估方法和管理措施产生了影响，以维持这一有价值的渔业。

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