Seasonal characterization of dugong feeding and biomass utilization on selected sites in Talibong Island
Seasonal characterization of dugong feeding and biomass utilization on selected sites in Talibong Island
复制标题
塔利邦岛选定地点儒艮摄食和生物量利用的季节特征
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
K. Adulyanukosol
中科院分区：
文献类型：
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作者：
Nanako Amamoto;K. Ichikawa;N. Arai;T. Akamatsu;T. Shinke;T. Hara;K. Adulyanukosol
摘要儒艮（Dugong dugon）是一种食草性海洋哺乳动物，几乎只以海草为食。先前对儒艮摄食行为的观察显示，它们甚至在低潮时海草床完全暴露在空气中的潮间带和其他较深的地方进食，潮差约为2- 6米。我们使用被动声学监测系统来监测它们的进食行为。在潮间带和深水两个地点采集了儒艮的摄食声。从白天和夜间摄食事件的比较结果来看，儒艮主要在夜间摄食（Welch t检验p<0.05）。同时，我们还在两个渔场采集了海草，并对两个渔场的海草种类组成和密度进行了比较。我们计算了在儒艮投饵前后，每个地点海草密度的投饵效率，并与它们进行了比较。这些比较结果显示，儒艮在两个觅食地所摄食的海草数量并无显著差异。
ABSTRACT Dugong ( Dugong dugon ) is an herbivorous marine mammal and feeds almost exclusively on sea grass. Previous observation of the dugong feeding behavior revealed that they feed even at intertidal flats where the sea grass beds are completely exposed in the air during low tide and also at other deeper sites, where the tidal range is about 2-6m. We used a passive acoustic monitoring system to monitor their feeding behavior. Dugongs’ feeding sounds were collected at two feeding grounds at an intertidal flat and a deep site. From the result of the comparison of feeding events during daytime to nighttime, we found dugongs mainly feed during the night (Welch t-test p<0.05). We also collected sea grasses at each feeding ground and compared the species composition of sea grasses and density of sea grass between the two sites. We calculated the feeding efficiency from the density of sea grass before and after dugong’s feeding at each site and compared to them. These comparisons revealed that there was no significant difference in the amount of sea grasses fed upon by dugong between the two feeding grounds.
影响因子：
2.4
作者：
Ichikawa, K;Tsutsumi, C;Adulyanukosol, K
通讯作者：
Adulyanukosol, K