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Title: Distribution and dynamics of reproductive patch in olive ridley sea turtles (Lepidochelys olivacea) off Rushikulya, Orissa coast of India
Authors: Tripathy, Basudev
Keywords: Olive ridley;Offshore distribution;Fishing;Threats;Rushikulya
Issue Date: Jun-2013
Publisher: NISCAIR-CSIR, India
Abstract: The distribution of olive ridley sea turtles in the nearshore waters of Rushikulya rookery in Orissa coast of India was studied during 2003-04 breeding season. Locations of turtle mating at sea were recorded and water depth, air and sea surface temperature was also recorded from all such locations. The estimated surface density of individual turtles was 35.1/km2 (CV = 11.22%) and the encounter rate was 3.68 turtles/km. Maximum offshore area utilized by mating pairs was 57.92 sq. km. Maximum turtle mating pairs occurred in depths of 16 - 28 m ( = 26 m) and 2 to 5 km from shore. Mating pair sightings were also greatest between 11.00 hrs - 13.00 hrs and at sea surface temperatures of 25o-26oC ( = 24.6oC). Local fishing practices and types of fishing nets used in the area are not found to influence turtle breeding activities. Factors such as time of the day, sea surface temperature and sea state were found to influence the turtle congregations. Long-term offshore population monitoring of turtles should be carried out to examine population trends at Rushikulya.
Page(s): 343-348
ISSN: 0975-1033 (Online); 0379-5136 (Print)
Appears in Collections:IJMS Vol.42(3) [June 2013]

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