Please use this identifier to cite or link to this item: https://doi.org/10.7717/peerj.12582
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dc.titleForaging ecology of the amphibious mudskipper Periophthalmus chrysospilos (Gobiiformes: Gobiidae).
dc.contributor.authorDinh, Quang Minh
dc.contributor.authorNguyen, Ton Huu Duc
dc.contributor.authorLam, Tran Thi Huyen
dc.contributor.authorNguyen, Tien Thi Kieu
dc.contributor.authorTran, Giang Van
dc.contributor.authorJaafar, Zeehan
dc.date.accessioned2022-07-15T02:04:02Z
dc.date.available2022-07-15T02:04:02Z
dc.date.issued2021
dc.identifier.citationDinh, Quang Minh, Nguyen, Ton Huu Duc, Lam, Tran Thi Huyen, Nguyen, Tien Thi Kieu, Tran, Giang Van, Jaafar, Zeehan (2021). Foraging ecology of the amphibious mudskipper Periophthalmus chrysospilos (Gobiiformes: Gobiidae).. PeerJ 9 : e12582-. ScholarBank@NUS Repository. https://doi.org/10.7717/peerj.12582
dc.identifier.issn2167-8359
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/228601
dc.description.abstractThe food composition and feeding ecology of fishes living in the intertidal zone play an essential role in understanding the energetic connectivity between terrestrial and aquatic systems. Periophthalmus chrysospilos is an amphibious fish species occurring in the intertidal zone, but data on its diet and foraging ecology is still poorly known. This study on Ps. chrysospilos was carried out from April 2020 to March 2021 at four sites within the Mekong Delta estuary to define the influence of spatio-temporal factors on the diet of this species. The diet composition and relative gut lengths (RGLs) of Ps. chrysospilos were analysed in relation to four parameters-sex, size, site, and season. A total of 1,031 individuals were collected, and their digestive tract lengths were used to calculate the RGL. The digestive tracts of only 546 individuals were with food items (approximately 1:1 of empty vs full digestive tract) and were subsequently used for further analyses. The ranges in total length and weight in both adult and juvenile individuals were 3.4-10.6 cm and 0.38-14.13 g, respectively. The RGL values varied with season, fish size and site, but was always lower than 1, indicating a predominantly carnivorous diet. The variability of food items found within the digestive tracts demonstrated its adaptability in pursuing prey items within the limits of the littoral zone, and its importance as a conduit of terrestrial-marine connectivity. This species is characterised as an opportunistic mesopredator feeding primarily on Acetes spp., Uca spp., Dolichoderus sp., and rarely on Polychaeta and Actinopterygii. Other items found within the digestive tract are Mollusca, and detritus. The diet composition of Ps. chrysospilos did not vary with season and size, but changed with sex and site parameters. Uca spp. contributed to the sexual variation in dietary component, whereas Mollusca, Uca spp., Dolichoderus sp. and detritus, were drivers for spatial variation in the dietary component. The research provides fundamental information on diet composition and feeding strategy, as well as contributes towards knowledge on foraging ecology and resource use by intertidal animal communities.
dc.publisherPeerJ
dc.sourceElements
dc.subjectCarnivorous
dc.subjectFood composition
dc.subjectMudskipper
dc.subjectSpecific feeder
dc.typeArticle
dc.date.updated2022-07-14T02:29:58Z
dc.contributor.departmentBIOLOGICAL SCIENCES
dc.description.doi10.7717/peerj.12582
dc.description.sourcetitlePeerJ
dc.description.volume9
dc.description.pagee12582-
dc.published.statePublished
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