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首页> 外文期刊>Marine ecology >Population dynamics, growth, production, and reproduction of the purple clam Amiantis purpurata
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Population dynamics, growth, production, and reproduction of the purple clam Amiantis purpurata

机译：紫色蛤蜊amiantis purpurata的人口动态，生长，生产和繁殖

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摘要

Amiantis purpurata is the dominant clam of shallow subtidal soft bottom communities in Buenos Aires province where it is a major prey item of economically important fish and gastropods as well as anemones. Despite its significant role in the benthic food web, there are few studies dealing with the population biology of this species. Growth, age, mortality, and production along with reproductive patterns and size at first maturity of A. purpurata were investigated at Mar del Plata (38 oS) area and compared with a population at the southernmost point of distribution, the only other studied population (42 oS). Early growth was empirically documented for the first time for this species by following a newly recruited cohort throughout the first two years of growth. This allowed for the size and age at first maturity to be accurately determined and provided early growth data for models, which are often difficult to obtain. Larger asymptotic size and quicker rates were reached at lower latitudes. Reproduction followed patterns similar to other temperate venerid bivalve populations with a more extended period of spawning observed at Mar del Plata. The studied population shows relatively high growth rates, achieves sexual maturity at approximately two years of age, and successfully recruits in this area, which was not observed in the other studied population for over 15 years. The environmental conditions in this area are likely more favorable than that of the southernmost population which shows low growth rates and no successful recruitment.
机译：Amiantis Purpurata是布宜诺斯艾利斯省的浅层阴性软底部群落的主导蛤，在那里它是经济上重要的鱼类和美食家以及海葵的主要猎物。尽管在底栖食品网站中作用具有重要作用，但很少有以下物种的人口生物学研究。在Mar del Plata（38个OS）地区在Mar Del Plata（38 OS）区域的第一次成熟时的生长，年龄，死亡率和生产以及在初始成熟的情况下进行了调查。与最南端的分布点的人口相比，唯一的其他学习人口（ 42 os）。通过在前两年的前两年的新招募队列之后，在整个新招聘的队伍中首次进行了早期的增长。这允许在第一次成熟时进行大小和年龄，以准确确定，并为模型提供早期生长数据，这通常难以获得。在纬度下达到较大的渐近尺寸和更快的速率。再现遵循类似于其他温带venerid双平均群体的模式，在Mar del Plata观察到更长时间的产卵期。学习人口表现出相对高的增长率，在大约两年的年龄上实现性成熟，并在该地区成功招募，在其他15年内未观察到的其他人口。该地区的环境条件可能比最南端的人口更有利，显示出低增长率，并且没有成功招聘。

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  • 来源
    《Marine ecology》 |2021年第2期|e12637.1-e12637.10|共10页
  • 作者

    Livore Juan P.; Arrighetti Florencia; Penchaszadeh Pablo E.;

  • 作者单位

    LARBIM Lab Reprod & Biol Integrat Invertebrados M Puerto Madryn Argentina;

    Museo Argentino Ciencias Nat Bernardino Rivadavia Lab Malacol & Ecosistemas Costeros Angel Gallardo 470 C1405DRJ Buenos Aires DF Argentina;

    Museo Argentino Ciencias Nat Bernardino Rivadavia Lab Malacol & Ecosistemas Costeros Angel Gallardo 470 C1405DRJ Buenos Aires DF Argentina;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    age; Amiantis purpurata; growth; reproduction;

    机译：年龄;amiantis purpurata;增长;繁殖;

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