Early recruitment and growth of the American oyster Crassostrea virginica (Bivalvia: Ostreidae) with respect to tidal zonation and season
Early recruitment and growth of the American oyster Crassostrea virginica (Bivalvia: Ostreidae) with respect to tidal zonation and season
复制标题
美国牡蛎 Crassostrea virginica（双壳纲：Ostreidae）在潮汐带和季节方面的早期补充和生长
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
R. Mann
中科院分区：
文献类型：
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作者：
G. Roegner;R. Mann
在美国弗吉尼亚州的约克河，新定居的牡蛎的生存和生长进行了测量，在潮下和潮间的治疗水平，在第一个月的定居后的生活。在实验室和图像分析技术的控制解决方案的孵化饲养的幼虫允许个人牡蛎生长在外地被跟踪通过时间。高死亡率发生在1周内postsettlement在所有的潮汐高度米3实验跨越自然招聘期间。这种最初的死亡率强烈影响后来的丰度，因为每周死亡率在2周后急剧下降。此外，在高温期间，所有新兵都被淘汰出潮间带中部和以上（> 25%的空中暴露）。只有在秋季发生招聘在潮间带自然牡蛎种群所占的地区。相比之下，低潮间带和潮下带种群在长达一个月的实验中持续存在，其中成年牡蛎很少。相对于更多浸没的牡蛎，暴露> 25%的潮间带牡蛎的生长（壳面积）减少。没有观察到密度依赖性增长虽然天然牡蛎种群似乎被降级到次最佳的潮间带，但由于致命的空气温度> 30 °C，成功招募到这一区域的数量在季节性基础上受到限制。
Survival and growth of newly settled oysters were measured at suband mtertidal treatment levels during the first month of post-settlement life in the York River, Virginia, USA. Controlled settlement of hatchery-reared larvae m the laboratory and image analysis techniques allowed for individual oysters grown in the field to be tracked through time. High mortality occurred within 1 wk postsettlement at all tidal heights m 3 experiments which spanned the natural recruitment period. This imtial mortality strongly influenced later abundance, as weekly mortality rates decreased sharply after 2 wk. Additionally, all recruits were eliminated from the mid-intertidal zone and above (>25 % aerial exposure) during high temperature periods. Only in autumn did recruitment occur in the mtertidal area occupied by natural oyster populations. In contrast, low intertidal and subtidal populations persisted through the month long experiments where adult oysters were rare Growth (shell area) of intertidal oysters exposed >25 % was reduced relative to more immersed oysters. Density-dependent growth was not observed While the natural oyster population appeared to be relegated to the suboptimum mtertidal, successful recruitment to this zone was limited on a seasonal basis by lethal air temperatures >30°C The mortality agents which structure the mtertidal population affect recently settled and juvenile oysters