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首页> 外文期刊>Marine ecology progress series >Barnacle settlement versus recruitment as indicators of larval delivery. I. Effects of post-settlement mortality and recruit density
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Barnacle settlement versus recruitment as indicators of larval delivery. I. Effects of post-settlement mortality and recruit density

机译：藤壶定殖与募集作为幼虫分娩的指标。 I.安置后死亡率和新兵密度的影响

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ABSTRACT: Larval delivery to benthic habitats strongly influences populations and communities. Daily larval settlement and weekly to monthly recruitment have been used to infer larval delivery mechanisms. Daily studies find that delivery varies with wind direction and the spring to neap tidal cycle while recruitment studies find variations related only to upwelling and downwelling. To resolve this dichotomy, the 2 types of observations were replicated simultaneously. ‘Safety Walk’ settlement plates were divided into quarters, placed in the intertidal zone, and censused daily, weekly, biweekly (i.e. every 2 wk) and monthly. Mortality of settlers on plates was very high; on average 10% of cyprids survived to recruit as juveniles. To investigate the high mortality, I sampled ceramic floor tile settlement plates, censused living and dead cyprids daily, and related mortality to weather and surface temperature of settlement plates. In the sun, surface temperature of plates reach 40 to 50°C within minutes, resulting in rapid desiccation of cyprids. Surface temperatures of floor tiles and natural rock were significantly lower and mortality on tiles was significantly lower. Settlement rate varied with recruit density; at densities 10 ind. cm–2 settlement was enhanced, but above this density settlement was inversely related to recruit density. Due to high cyprid mortality and the effect of recruit density on settlement, barnacle recruitment could not be used to infer mechanisms of larval delivery to the shore.
机译：摘要：幼体向底栖生境的传递强烈影响人口和社区。每天的幼虫沉降和每周到每月的募集已被用来推断幼虫的分娩机制。日常研究发现，送风随风向和春季至潮汐周期的变化而变化，而募集研究发现，其变化仅与上升和下降有关。为了解决这种二分法，同时复制了两种类型的观察结果。 “安全步行”结算板分为四部分，放在潮间带，每天，每周，每两周（即每2周）和每月进行一次普查。盘子上的定居者的死亡率很高;平均少于10％的塞浦路斯人存活下来被招募为青少年。为了调查高死亡率，我对陶瓷地板砖沉降板进行了采样，每天对人口居住和死亡的塞浦路斯进行了人口普查，并将死亡率与沉降板的天气和表面温度相关。在阳光下，极板的表面温度在数分钟内达到40至50°C，从而使赛普拉斯迅速干燥。地砖和天然岩石的表面温度显着降低，地砖的死亡率显着降低。安置率随新兵密度而变化;密度<10 ind。 cm –2 沉降得到了增强，但在此之上，沉降与入库密度成反比。由于塞浦路斯人的死亡率很高，而且新兵密度对沉降有影响，因此藤壶的募集不能用来推断幼体向海岸的输送机制。

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