The mechanisms leading to ontogenetic diet shift in a microcanivore, Pterogobius elapoides (Gobiidae)

Title
The mechanisms leading to ontogenetic diet shift in a microcanivore, Pterogobius elapoides (Gobiidae)
Author(s)
석호영최승호[최승호]
Keywords
BAY GOBY PISCES; FEEDING ECOLOGY; PREY SELECTION; FORAGING BEHAVIOR; FISH; MORPHOLOGY; HABITAT; SIZE; SURFPERCH; PATTERNS
Issue Date
201208
Publisher
TAYLOR & FRANCIS LTD
Citation
ANIMAL CELLS AND SYSTEMS, v.16, no.4, pp.343 - 349
Abstract
A variety of fish species undergo an ontogenetic change in prey selectivity, and several potentially interacting factors, including nutrient requirement, microhabitat change, and foraging ability, may account for the occurrence of the shift. Here we examine the foraging ecology and ontogenetic diet shift of a micro-carnivorous goby, Pterogobius elapoides (serpentine goby), dominant component of fish assemblage in shallow rocky areas off the coast in Korea and Japan. Although most other gobies are primarily benthic carnivores, P. elapoides is a semipelagic fish; however, little is known about how those species change their foraging tactics with growth. In our diet analyses, the most common diet was pelagic copepods and benthic amphipods, and diet shift was observed from pelagic to benthic with growth. The ontogenetic diet shift seems to be the result of the preference for energetically more profitable prey in larger-size classes as well as the results of different prey availability due to among-habitat variation in diet. However, differential food preference does not appear to affect individual scope for searching food. Several factors such as predation pressures and interspecific resource partitioning might contribute to the changes in diet observed among size classes, which were included in our ongoing tests.
URI
http://hdl.handle.net/YU.REPOSITORY/27501http://dx.doi.org/10.1080/19768354.2012.667002
ISSN
1976-8354
Appears in Collections:
이과대학 > 생명과학과 > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE