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Morphlogical and morphometric study on the keyhole limpet Diodora rupellii   (Sowerby, 1834) from the Egyptian rocky shores of the Mediterranean and Red seas

Waheed M. Emam, Wiame W.M. Emam and Tarek A. Ghareb

Zoology Dept., Faculty of Science, Ain Shams Univ.

ABSTRACT

The differentiations in morphology and morphometery in two populations of the keyhole limpet Diodora rueppellii from the rocky shores of Abu Qir on the Mediterranean Sea (P1) and Suez Gulf on the Red Sea (P2) were studied. The results indicated that the shell of P1 and P2 was similar morphologically, while they are different in the rate of growth of their anterior and posterior slopping walls and in height. The computed regression constants of the different relationships between shell length and shell measurements, shell indices and body weight were computed. Their computed values indicated the possibility for differentiation between individuals of these two populations. This variations can be attributed to the difference in environmental conditions at Abu Qir and Suez Gulf.

Key words: Morphology, morphometry, intraspecific variations, interspecific variations, keyhole limpet,  Diodora rupellii  , Mediterranean shore, Red sea shore, rocky shore.