Show simple item record

dc.contributor.authorArthington, AH
dc.contributor.authorMarshall, CJ
dc.date.accessioned2020-01-07T04:18:52Z
dc.date.available2020-01-07T04:18:52Z
dc.date.issued1999
dc.identifier.issn01166514
dc.identifier.urihttp://hdl.handle.net/10072/121562
dc.description.abstractThe exotic mosquitofish, Gambusia holbrooki Girard, has become established in freshwater systems on sand islands of high conservation significance off the coast of southeastern Queensland, Australia. These freshwater systems support indigenous fish species with very restricted distributions and the mosquitofish has been listed as a threat to at least three rare species. This paper records the diet of G. holbrooki in an oligotrophic dune lake and explores the potential for competition for food between the mosquitofish, the Ornate Rainbowfish, Rhadinocentrus ornatus (Melanotaeniidae), and the Firetail Gudgeon, Hypseleotris galii (Eleotrididae). There was a high degree of similarity in mean population diets of R. ornatus and G. holbrooki (overlap index=0.83), moderate dietary overlap between G. holbrooki and H. galii (overlap index=0.49) and low dietary overlap between R. ornatus and H. galii (overlap index=0.18). In some months, the mosquitofish switched to feeding on aquatic invertebrates normally consumed by gudgeons, and levels of dietary overlap between these species increased markedly. The capacity of G. holbrooki to feed opportunistically on a wide variety of aquatic prey, confirmed again in this study, could exert a significant pressure on small populations of both indigenous fishes. Of the two species studied here, the restricted Ornate Rainbowfish appears to be particularly vulnerable to the effects of dietary interactions with the mosquitofish.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAsian Fisheries Society
dc.publisher.placePhilippines
dc.publisher.urihttps://www.asianfisheriessociety.org/publication/
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto16
dc.relation.ispartofissue1
dc.relation.ispartofjournalAsian Fisheries Science
dc.relation.ispartofvolume12
dc.subject.fieldofresearchZoology
dc.subject.fieldofresearchFisheries Sciences
dc.subject.fieldofresearchcode0608
dc.subject.fieldofresearchcode0704
dc.titleDiet of the Exotic Mosquitofish, Gambusia holbrooki, in an Australian Lake and Potential for Competition with Indigenous Fish Species
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.hasfulltextNo Full Text
gro.griffith.authorArthington, Angela H.
gro.griffith.authorMarshall, Chris


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record