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Genetic Diversity in Marine Molluscs: A Test of the Niche‐Width Variation Hypothesis
Author(s) -
Lavm B.,
Nevo E.
Publication year - 1981
Publication title -
marine ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.668
H-Index - 58
eISSN - 1439-0485
pISSN - 0173-9565
DOI - 10.1111/j.1439-0485.1981.tb00275.x
Subject(s) - niche , biology , loss of heterozygosity , allele , genetic variation , genetic diversity , locus (genetics) , evolutionary biology , ecological niche , ecology , zoology , genetics , gene , population , habitat , demography , sociology
. A test of the niche width variation hypothesis was conducted in the three Mediterranean littoral species of the family Trochidae: Monodonta turbinata, M. turbiformis and Gibbula richardi. Allozymic variation encoded by 26 gene loci was analyzed, and the levels of polymorphism (P), heterozygosity (H) and allele diversity per locus (A) were estimated and appear to support the niche‐width variation hypothesis. The broad‐niche species, M. turbiformis and G. richardi are more polymorphic and heterozygous than the relatively narrow‐niche M. turbinata (P = 0.571; 0.731 and 0.417; H = 0.108; 0.116 and 0.078; A = 2.025; 2.489 and 1.965, respectively).