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1 April 2003 Growth and Reproduction of the Sea Snake, Emydocephalus ijimae, in the Central Ryukyus, Japan: a Mark and Recapture Study
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Abstract

A mark and recapture study was carried out for three years on a population of the Ijima's sea snake, Emydocephalus ijimae, in the coastal shallow water of Zamamijima Island, central Ryukyus, Japan. The relatively high recapture (47% of 167 marked snakes) suggests that E. ijimae is a particularly philopatric, sedentary species among the sea snakes. The sex ratio (male: female), approximately 1.6:1, significantly skewed from 1:1. The growth rate in SVL declined with growth, with females thoroughly growing better than males. Males and females were estimated to begin reproductive activity in the second or third summer and the third spring after birth, respectively. Frequency of female reproduction is guessed to vary from annual to biennial, or even less frequent.

Gen Masunaga and Hidetoshi Ota "Growth and Reproduction of the Sea Snake, Emydocephalus ijimae, in the Central Ryukyus, Japan: a Mark and Recapture Study," Zoological Science 20(4), 461-470, (1 April 2003). https://doi.org/10.2108/zsj.20.461
Received: 25 November 2002; Accepted: 1 December 2002; Published: 1 April 2003
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