دوره 6، شماره 4 - ( 7-1403 ) جلد 6 شماره 4 صفحات 0-0 | برگشت به فهرست نسخه ها

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Chatterjee L, Rong A, Samrat C S, Sinha S, Samanta T, Basu Roy A. Foraging and diving pattern of the Little Cormorant Microcarbo niger (Vieillot) (Pelecaniformes: Phalacrocoracidae) of Ecopark, Kolkata, India. JAD 2024; 6 (4)
URL: http://jad.lu.ac.ir/article-1-430-fa.html

Foraging and diving pattern of the Little Cormorant Microcarbo niger (Vieillot) (Pelecaniformes: Phalacrocoracidae) of Ecopark, Kolkata, India. مجله تنوع جانوری. 1403; 6 (4)

URL: http://jad.lu.ac.ir/article-1-430-fa.html

Foraging and diving pattern of the Little Cormorant Microcarbo niger (Vieillot) (Pelecaniformes: Phalacrocoracidae) of Ecopark, Kolkata, India

چکیده: (30 مشاهده)

This study aims to investigate the feeding behaviour and diving habits of the Little Cormorant (Microcarbo niger) in the vicinity of Pakhibitan, which is a component of Ecopark, the largest urban park located in Newtown, Kolkata, West Bengal, India. The study took place for three days a week starting from September 2021 to February 2022. The Little Cormorant mostly used the Lake as a foraging location in Pakhibitan, with the highest number of dives (1957 dives, 10.78 ± 10.43 sec) and surface pauses (1980 surface pauses, 6.02 ± 5.48 sec) compared to a nearby smaller pond. The pattern of dive bout/surface pause showed considerable variability between lake (F = 1.055, df = 1, P > 0.05) and pond (F = 0.153, df = 1, P > 0.05). There may be a correlation between the average duration of dives and the average recovery time between dives, and the depth of the water bodies. In certain cases, longer dives were associated with longer rest periods, resulting in increased time spent searching for prey. Consequently, the foraging efficiency of the dives may decrease as the diving depth increases. The feeding behaviour of the Little Cormorant is subject to the influence of various environmental conditions, necessitating a more comprehensive investigation.

نوع مطالعه: مقاله پژوهشی اصلی |
دریافت: 1403/1/12 | پذیرش: 1403/6/19 | انتشار: 1403/7/9

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