Aggregation of beaked sea snake Enhydrina schistosa (Daudin, 1803) in mudbank area of southwest coast of India

Jeyabaskaran, R and Abhilash, K S and Mohammed, Abbas A and Mohan, Gishnu and Vishnu, P G and Khambadkar, L R and Kripa, V (2014) Aggregation of beaked sea snake Enhydrina schistosa (Daudin, 1803) in mudbank area of southwest coast of India. [Image]

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    Abstract

    The beaked sea snake Enhydrina schistosa (Daudin, 1803) is commonly found all along the Indian coast. There are about 22 species of sea snakes belonging to 3 families and 3 sub-families reported from Indian waters. All the sea snakes in India are protected under India Wildlife Protection Act 1972. During a special cruise by onboard FRV Silver Pompano for mudbank research, a shrimp trawl was operated in the near shore at 6 meter depth and offshore at 12 meter depth along Alappuzha coast. The beaked sea snakes were caught during each haul and immediately released into the sea in live condition. About 2 to 5 specimens regularly occurred in the catch at 12 meter depth in each haul and the number was always higher at 6 meter depth. The length of the specimens caught ranged between 51.7 and 112.6 cm. On 5th June, 2014 about 20 numbers of beaked sea snake were caught from the same location. The sea bottom was muddy and it was observed that the beaked sea snakes preferred to live in shallow muddy areas. The stranding of 4 to 6 dead beaked sea snakes were observed almost every day at Punnapara coast of Alappuzha, where the mudbank is formed during monsoon. The food and feeding habits of beaked sea snakes also studied based on the stomach content analysis. The snakes caught in the 6 meter depth, cat fish was the dominant food item and snakes caught at 12 meter depth pufferfish were predominant. The cat fish was identified as Arius jella and the puffer fish was Lagocephalus inermisis. Occurrence of the school of Arius jella occurrence was common in mudbank area; hence the beaked sea snake abundance was more. The feeding behaviour of beaked sea snakes also noticed. It was observed that they always ingest head portion of the prey (fish) first. The morphological features and biology of the beaked sea snake are discussed in the paper in detail. (PDF) Aggregation of beaked sea snake Enhydrina schistosa (Daudin, 1803) in mudbank area of southwest coast of India.

    Item Type: Image
    Additional Information: Presented at International Symposium on 'Marine Ecosystems - Challenges and Opportunities (MECOS 2), At Kochi, Kerala, India
    Uncontrolled Keywords: Aggregation of beaked sea snake; Enhydrina schistosa (Daudin, 1803); mudbank area of southwest coast of India; Alappuzha; FRV Silver Pompano
    Subjects: Reptile
    Divisions: CMFRI-Kochi > Fishery Environment
    Subject Area > CMFRI > CMFRI-Kochi > Fishery Environment
    CMFRI-Kochi > Fishery Environment
    Subject Area > CMFRI-Kochi > Fishery Environment
    Depositing User: Arun Surendran
    Date Deposited: 25 Jun 2018 04:42
    Last Modified: 25 Jun 2018 04:42
    URI: http://eprints.cmfri.org.in/id/eprint/12870

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