Abstract The present study was carried out to determine the spat efficiency in the pearl oyster (Pinctada radiata, Leach, 1814) in surface and bottom water at Karantina Island (Izmir/Turkey). Polyethylene mesh bags were used as collectors. An annual average of 175.16 ± 11.32 spat m−2 was obtained from PSC (placed surface collectors) and 82.65 ±3.89 spat m−2 was obtained from PBC (placed bottom collectors). The largest number of new spat attachments occurred in August, both on PSC and PBC: 44 ± 3.46 and 26 ± 2.88 spats were found respectively in the outer and inner mesh bags of PSC, and 33 ±5.77 and 48 ± 6.92 spats were found respectively in the outer and inner mesh bags of PBC. New spat attachments (≥ 10 mm) continued throughout the study period, except April and May. Adult pearl oysters (≥ 50 mm) were found in May. There was a significant difference between PSC and PBC in the total number of spat attachments, the monthly spat attachments and the first spat attachments (p < 0.05). The total number of new spat attachments was positively correlated with temperature and chlorophyll a for both depths (p<0.05).

中文翻译：

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卡伦蒂娜岛地表和底水中珍珠母贝辐照母贝（Leach，1814 年）的产卵效率

摘要 本研究旨在确定 Karantina 岛（伊兹密尔/土耳其）地表和底水中珍珠贝（Pinctada radiata，Leach，1814）的产卵效率。聚乙烯网袋用作收集器。从 PSC（放置的表面收集器）获得 175.16 ± 11.32 spat m-2 的年平均值，从 PBC（放置的底部收集器）获得 82.65 ±3.89 spat m-2。PSC和PBC上8月份出现的新附着物数量最多：PSC外网袋和内网袋分别发现44±3.46和26±2.88个附着点，分别发现33±5.77和48±6.92个附着点在 PBC 的外网袋和内网袋中。除了 4 月和 5 月外，整个研究期间都继续出现新的卵附着物（≥ 10 毫米）。5 月份发现了成年珍珠贝（≥ 50 毫米）。PSC 和 PBC 之间在 spat 附件总数、每月 spat 附件和第一次 spat 附件方面存在显着差异（p < 0.05）。两个深度的新卵附着总数与温度和叶绿素 a 呈正相关（p < 0.05）。