Intense spawning aggregation of ragged sea hare, Bursatella leachii Blainville, 1817 in Netravathi estuary

Sasikumar, Geetha and Viswambharan, Divya and Rohit, Prathibha and Srinath, S (2022) Intense spawning aggregation of ragged sea hare, Bursatella leachii Blainville, 1817 in Netravathi estuary. Marine Fisheries Information Service; Technical and Extension Series, 254. pp. 26-27. ISSN ISSN 0254-380 X

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Abstract

Large aggregations of a single species of sea hares were observed during a regular clam survey on 3rd February 2022, in the estuarine stretches of river Netravathi in Mangalore. The 15 x 15 cm quadrants were used to count the egg mass found in the intertidal area of the estuary. Samples of sea hare entangled in gillnets were collected and brought to lab for further analysis with with number of organisms entangled in each panel was documented. Measurements were taken to the nearest 0.1 mm using digital vernier calliper and total body weight was noted to the nearest 0.1 g with an electronic weighing balance. A semi-structured interview was also conducted with the fishers of the region during field visit to record the extend of menace created by the organism.

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