Abstract:
The dimensional relationship of the shells of the oysters, Crassostrea rivularis, Saccostrea glomerata, and S. cuccullata, occurring at the coast of Karachi, have been investigated. C. rii ularis attains greater shell dimensions than the other two species. S. cuccullata requires greater width and thickness of shell than. S. glomerata. In C. rivularis the shells of its Sonari population are greater in dimension and thickness than those of the Korangi Creek population, and there is also a differential orientation in the two populations. In all the five populations of the three species the length/height relationship has always been curvilinear and that of the width/height linear. The indices of shape show that there is a great variation in the shells of the wild and exploited populations of these species. The difference in the pattern of growth of the shells of these populations seems to be influenced by ecological factors like the density of population, surf action, and exposure trait.
Page(s):
46-49
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Scientific and Industrial Research, Volume: 22, Issue: 1--2, Year: 1979