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Foraging analysis of Endangered Greater Adjutant Stork Leptotilus dubios Gemlin in certain habitat of Assam, India.
bioRxiv - Zoology Pub Date : 2020-06-01 , DOI: 10.1101/2020.05.31.125328
Purnima Devi Barman , D. K. Sharma

The endangered Greater Adjutant Stok Leptotilus dubios Gemlin confined only in some pockets in Assam and Bihar in India and in certain areas of Laos and Cambodia has poorly understood in its foraging activities in its natural habitats. Attempt has been made to address the forage pattern in its natural habitat wetlands in the Kamup district and in a city garbage dump in Guwahati in Assam, India. The various forage methods like walking, visual tactile etc and their relation with the body metrices like beak length, tibia tarsus length and its mass were assessed in terms of foraging habits . Forage actvities were evaluated during the breeding (May to September) and non breeding (October to April) time of the study period of 2012-2017 at different water level of the wetland(s). The foraging range of this stork assessed at an confinement of aerial distance of 15 km from the nesting sites appears as resident non migratory birds by habits. Types of diet composition obtained from the regurgitated food at the ground of the nesting sites were mostly the fish group channa and cyprinids. Profitability index was determined at the captive stork showed in favour of these two groups within the size group of 5 to 15 cm. Larger food item showed lesser profitability index. PCA analysis showed negative foraging correlation with the Prey size greater than 8cm and 15 cm, while the captivity study was conducted Thus the present findings on the foraging assessment of Greater Adjutant might be the baseline information for conservation action plan.

中文翻译:

印度阿萨姆邦某些生境中濒临灭绝的大副鹳Leptotilus dubios Gemlin的觅食分析。

濒临灭绝的大副St Stop Leptotilus dubios Gemlin仅局限于印度阿萨姆邦和比哈尔邦以及老挝和柬埔寨某些地区的某些地区,对其自然栖息地的觅食活动知之甚少。已经尝试解决其在卡姆普地区的自然栖息地湿地和印度阿萨姆邦古瓦哈提市的城市垃圾场中的牧草模式。根据觅食习惯,评估了各种觅食方法,例如步行,视觉触觉等,以及它们与身体指标的关系,例如喙长,胫骨tar长度和体重。在湿地不同水位的2012-2017年研究期间的繁殖期(5月至9月)和非繁殖期(10月至4月)评估了草料活动。在距筑巢点15 km的空中距离范围内评估的该鹳的觅食范围按习惯显示为常驻非候鸟。从筑巢地点返潮的食物中获得的饮食组成类型主要是鱼类鱼和鲤鱼。确定圈养鹳的获利能力指数表明,在5至15厘米大小的群体中,这两组均受青睐。较大的食品显示出较低的盈利指数。PCA分析显示,与猎物大小大于8cm和15cm的猎物负相关,同时进行了圈养研究,因此,目前对大副官觅食评估的发现可能是保护行动计划的基准信息。从筑巢地点返潮的食物中获得的饮食组成类型主要是鱼类鱼和鲤鱼。确定圈养鹳的获利能力指数表明,在5至15厘米大小的群体中,这两组均受青睐。较大的食品显示出较低的盈利指数。PCA分析显示,与猎物大小大于8cm和15cm的猎物负相关,同时进行了圈养研究,因此,目前对大副官觅食评估的发现可能是保护行动计划的基准信息。从筑巢地点返潮的食物中获得的饮食组成类型主要是鱼类鱼和鲤鱼。确定圈养鹳的获利能力指数表明,在5至15厘米大小的群体中,这两组均受青睐。较大的食品显示出较低的盈利指数。PCA分析显示,与猎物大小大于8cm和15cm的猎物负相关,同时进行了圈养研究,因此,目前对大副官觅食评估的发现可能是保护行动计划的基准信息。确定圈养鹳的获利能力指数表明,在5至15厘米大小的群体中,这两组均受青睐。较大的食品显示出较低的盈利指数。PCA分析显示,与猎物大小大于8cm和15cm的猎物负相关,同时进行了圈养研究,因此,目前对大副官觅食评估的发现可能是保护行动计划的基准信息。确定圈养鹳的获利能力指数表明,在5至15厘米大小的群体中,这两组均受青睐。较大的食品显示出较低的盈利指数。PCA分析显示,与猎物大小大于8cm和15cm的猎物负相关,同时进行了圈养研究,因此,目前对大副官觅食评估的发现可能是保护行动计划的基准信息。
更新日期:2020-06-01
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