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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Surfacing and diving behaviour of free-ranging Ganges river dolphin, Platanista gangetica gangetica
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Surfacing and diving behaviour of free-ranging Ganges river dolphin, Platanista gangetica gangetica

机译：恒河恒河海豚，Platanista gangetica gangetica的表面和潜水行为

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摘要

Swimming and breathing are the two most important behaviours of cetaceans. Due to the turbid waters of the Ganges, underwater activities of the Ganga river dolphin, Platanista gangetica gangetica in wild conditions are difficult to observe. Short surfacing time is also a big constraint while studying its behaviour. To observe surfacing behaviour of the species in its natural habitat, individual and groups of dolphins were studied using focal-animal and ad libitum sampling protocols at the confluence of the Ganga and Gandak rivers near Patna. The study recorded six types of surfacing patterns, which were dependent on age-class and offshore distance of the individual. Mean dive-time was 120 s, however, the highest dive-time was 465 s. Diurnal movement in the dolphins was also observed. This is the first report on surfacing behaviour of the Ganges river dolphin in natural habitat. We could discuss majority of the diurnal surfacing patterns, while some of them are undiscussed due to limited literature on this aspect. Studies in future should be focused on underwater activities as well as physiological determinants of surfacing behaviour of the species.
机译：游泳和呼吸是鲸类的两个最重要的行为。由于恒河浑浊的水，在野外条件下很难观察到恒河海豚，Ptantanista gangetica gangetica的水下活动。在研究其行为时，较短的堆焊时间也是一个很大的限制。为了观察该物种在其自然栖息地中的表面行为，在巴特那附近的恒河和甘达克河交汇处，使用焦点动物和任意采样方案研究了海豚的个体和群。该研究记录了六种类型的堆焊模式，这取决于个人的年龄和离岸距离。平均潜水时间为120 s，但是最高潜水时间为465 s。还观察到海豚的昼夜运动。这是关于恒河海豚在自然栖息地表面行为的第一份报告。我们可以讨论大多数的昼夜堆焊模式，但由于这方面的文献有限，因此其中一些未被讨论。未来的研究应集中于水下活动以及该物种表面行为的生理决定因素。

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