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- Title
Ontogenetic habitat and dietary shifts in Japanese turban snail <italic>Turbo cornutus</italic> at Nagai, Sagami Bay, Japan.
- Authors
Hayakawa, Jun; Ohtsuchi, Naoya; Kawamura, Tomohiko; Kurogi, Hiroaki
- Abstract
A field survey and a laboratory experiment were conducted to examine ontogenetic shifts in habitat and diet of the turban snail <italic>Turbo cornutus</italic>. The main habitat of turban snail juveniles smaller than 10 mm shell height (SH) was turfs of articulated coralline algae, and that of adults larger than 50 mm SH was kelp beds of <italic>Ecklonia bicyclis</italic> and <italic>Ecklonia cava</italic>. However, the ontogenetic habitat shift during the juvenile stage of 20-50 mm SH was unclear. From the results of a long-term feeding experiment and stable isotope analysis, the gelidiacean alga <italic>Gelidium elegans</italic> was assumed to be more important as a food source for juvenile turban snail than <italic>E. cava</italic> in the field. However, the frequency of individuals inhabiting gelidiacean algal turfs was low in both juvenile and adult stages. Thus, the ontogenetic shifts in habitat and diet did not coincide and other factors, i.e., daytime refuge, are important. As the growth rate was higher in the juveniles fed on the two algal species than those fed on single algal species, co-occurrence of various algal habitats in rocky shore ecosystems as a coastal ecosystem complex may enhance growth of turban snail juveniles feeding on a combination of different algal species.
- Subjects
SNAILS; AQUATIC habitats; ANIMAL feeding behavior; ONTOGENY; ALGAE as feed; GELIDIUM; KELP bed ecology; COASTAL ecology; ANIMAL behavior
- Publication
Fisheries Science, 2018, Vol 84, Issue 2, p201
- ISSN
0919-9268
- Publication type
Article
- DOI
10.1007/s12562-017-1170-5