Nasrolahi Ali
Iranian Academic Center for Education, Culture and Research, Tarbiat Moallem Branch, Tehran, Iran.
Pak J Biol Sci. 2007 Jul 1;10(13):2231-6. doi: 10.3923/pjbs.2007.2231.2236.
The effect of different food concentration, substratum, light periodicity, salinity, cyprid density and cyprid age on the settlement of Balanus improvisus were studies. Released larvae were mass reared in 0.6 L glass beakers to the cyprid stage. Then, attachment was monitored once a day. Chaetoceros calcitrans was used as food at three cell concentrations (0.5 x 10(5), 1 x 10(5) and 2 x 10(5) cells mL(-1)). Larval settlement was carried out on two substratum under three light period (12L:12D, 16L:8D and 8L:16D) at seven salinities (7, 12, 15, 18, 25, 28 and 36 ppt). Cyprid density was used from five to 200 larvae per 5 mL of seawater. Cyprids were aged for one to seven days. The maximum and minimum percent settlement was observed at 2 x 10(5) and 0.5 x 10(5) cells mL(-1), respectively. Cyprids settled in higher numbers on polystyrene compared to glass surface. Percent settlement was higher in 8L:16D than another light periods but, no significant difference in percent settlement between 12L:12D and 16L:8D light periods was seen. Differences in settlement at various salinities were not statistically significant except in 10 ppt which percent settlement was significantly higher. Cyprid density did not have any effect on percent settlement but cyprid age had a significant effect on percent settlement.
研究了不同食物浓度、基质、光照周期、盐度、金星幼虫密度和金星幼虫年龄对史氏藤壶（Balanus improvisus）附着的影响。将释放的幼虫在0.6升玻璃烧杯中大量饲养至金星幼虫阶段。然后，每天监测附着情况。使用钙板金藻（Chaetoceros calcitrans）作为食物，设置三种细胞浓度（0.5×10⁵、1×10⁵和2×10⁵个细胞·毫升⁻¹）。幼虫附着实验在两种基质上进行，设置三种光照周期（12小时光照∶12小时黑暗、16小时光照∶8小时黑暗和8小时光照∶16小时黑暗），七种盐度（7、12、15、18、25、28和36ppt）。金星幼虫密度设置为每5毫升海水5至200只幼虫。金星幼虫的年龄为1至7天。分别在2×10⁵和0.5×10⁵个细胞·毫升⁻¹时观察到最大和最小附着百分比。与玻璃表面相比，金星幼虫在聚苯乙烯上附着的数量更多。在8小时光照∶16小时黑暗条件下的附着百分比高于其他光照周期，但在12小时光照∶12小时黑暗和16小时光照∶8小时黑暗光照周期之间的附着百分比没有显著差异。除了在10ppt时附着百分比显著较高外，不同盐度下的附着差异没有统计学意义。金星幼虫密度对附着百分比没有任何影响，但金星幼虫年龄对附着百分比有显著影响。
