The Relationship Between Shell Morphology and Microhabitat Flow in the Endemic Hawaiian Stream Limpet (Hihiwai), Neritina Granosa (Prosobranchia: Neritidae)
Neritina granosa has three shell morphologies: conic (smooth, narrow shell), intermediate (rugose, narrow shell), and winged (flattened, rugose, and flared shell margin). Winged morphs represented 82% of the population at the mouth below the terminal waterfall. At sites above the falls, conic and intermediate morphs dominated. Limpets from the mouth had significantly lower shell-length/shell-width and body-weight/shell-weight ratios and occurred in areas of lower benthic and surface velocities than upstream populations. Because field orientation of the three shell morphs is unpredictable, microhabitat flow apparently has little or no effect on the phenotypic expression of shell morphology. The transition between winged and conic/intermediate morphs in upstream populations is restricted by bioenergetic constraints on the partitioning of energy between the competing demands of shell and tissue growth.
ISSN: 0030-8870; E-ISSN: 1534-6188
University of Hawaii Press
Way, Carl M.; Burky, Albert J.; and Lee, M. T., "The Relationship Between Shell Morphology and Microhabitat Flow in the Endemic Hawaiian Stream Limpet (Hihiwai), Neritina Granosa (Prosobranchia: Neritidae)" (1993). Biology Faculty Publications. 290.