Comparative studies of the genus echinometra from okinawa and mauritius

Zoological Science
Y ArakakiI Fagoonee

Abstract

Okinawan sea urchins, the genus Echinometra, are four independent species. But which species are the same species as E. mathaei and E. oblonga as described by is still open to question. To answer this question, a field survey of genus Echinometra was made in Mauritius (the type locality of E. mathaei) according to the characteristics used to classify Okinawan Echinometra: appearance, pore pairs, spicules in gonads and tubefeet, sperm shape, and distribution on a reef. The results of crossfertilization between Echinometra from Mauritius and Okinawa are also reported. Mauritian Echinometra are classified into three groups which resemble Okinawan Echinometra sp. B, D, and violet spine color Echinometra. The latter has almost the same characteristics as Okinawan Echinometra sp. B but with violet spines, a spine color not found in Okinawa. In cross-fertilization experiments, the sperm of Mauritian Echinometra sp. B-like and violet Echinometra fertilized Okinawan Echinometra sp. B with almost 100% success. However, fertilization was unsuccessful with other Okinawan Echinometra species. Therefore, it could be said that Okinawan Echinometra sp. B is the same as Mauritian Echinometra sp. B-like, and the counterparts of Okinawan Echinome...Continue Reading

Citations

Aug 30, 2000·Journal of Experimental Marine Biology and Ecology·K Hibino, van Woesik R
Dec 15, 2004·Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology·Sk Mustafizur Rahman, Tsuyoshi Uehara
Oct 2, 2012·Journal of Zhejiang University. Science. B·M Aminur RahmanMariana Nor Shamsudin
Apr 27, 2021·Ecological Applications : a Publication of the Ecological Society of America·Shigeru Kawamata, Seiya Taino

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Methods Mentioned

BETA
electrophoresis

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