Singh C P, Ram R N, Singh R N
J Environ Biol. 2013 Jul;34(4):789-92.
A comparative study was conducted for the food items and feeding pattern of Channa punctatus in pond environment and in reservoir of Tarai region in Uttarakhand state. Observation was made for body length, gut length, food and feeding frequency and qualitative and quantitative analysis of gut content. Both, body length and gut length were in higher side with a ratio of 1:2.1 for the natural fish stock of reservoir. Gut content mainly consists of crustacean, insects, mollusks, small fishes and semi-digested material. There was significant difference for the percent occurrence of the food items (p < 0.01) of natural stock of reservoir and pond reared stock. The study revealed that seasonal variability of natural food items in different habitats and their biological diversity put impacts on the biological needs in terms of food and feeding pattern of the same fish species.
对北阿坎德邦塔莱地区池塘环境和水库中的斑鳢食物种类及摄食模式进行了比较研究。对体长、肠长、食物及摄食频率以及肠道内容物进行了定性和定量分析。对于水库中的天然鱼群,体长和肠长均处于较高水平,比例为1:2.1。肠道内容物主要包括甲壳类动物、昆虫、软体动物、小鱼和半消化物质。水库天然鱼群和池塘养殖鱼群食物种类的出现百分比存在显著差异(p < 0.01)。研究表明,不同栖息地天然食物种类的季节变化及其生物多样性对同一鱼类物种在食物和摄食模式方面的生物需求产生了影响。