Seasonal and developmental diet shifts in sympatric and allopatric intertidal gobies determined by stomach content and stable isotope analysis SCIE SCOPUS

Cited 3 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Seasonal and developmental diet shifts in sympatric and allopatric intertidal gobies determined by stomach content and stable isotope analysis
Author(s)
Carbia, Penelope S.; Brown, Culum; Park, Joo Myun; Gaston, Troy F.; Raoult, Vincent; Williamson, Jane E.
Publication Year
2020-10
Abstract
Resource partitioning facilitates the coexistence of sympatric species through spatial, temporal and/or trophic strategies. Fishes living in the intertidal zone demonstrate highly adaptive plastic behaviour, including resource partitioning, through spatial and temporal shifts in diet and microhabitat. Although intertidal fish assemblages are influenced by inter- and intraspecific competition, few studies have compared the extent of resource partitioning between sympatric species in the context of trophic niche plasticity. Here we used complementary approaches, stomach content and stable isotope (delta C-13 and delta N-15) analyses, to evaluate seasonal and developmental shifts in trophic niche position in two sympatric (Favonigobius lentiginosusandBathygobius krefftii) and one allopatric (Bathygobius cocosensis) species of intertidal goby. The results indicate that resource partitioning in the two sympatric species varied with season, with almost no trophic niche overlap in summer to about similar to 30% overlap in winter. Also, evidence of dietary changes was found inB. cocosensis, which is likely associated with a shift in microhabitat and intraspecific competition. The findings highlight the temporal range of behavioural plasticity in trophic niche position of intertidal gobies, which likely has high adaptive value in the dynamic intertidal zone.
ISSN
0022-1112
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/32902
DOI
10.1111/jfb.14463
Bibliographic Citation
JOURNAL OF FISH BIOLOGY, v.97, no.4, pp.1051 - 1062, 2020
Publisher
WILEY
Keywords
Bathygobius; Favonigobius; resident; resource partitioning; stable isotopes
Type
Article
Language
English
Document Type
Article; Early Access
Publisher
WILEY
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