Biology and potential impacts of rudd (Scardinius erythrophthalmus L.) in New Zealand

Simple item page
dc.contributor.authorHicks, Brendan J.
dc.coverage.spatialConference held at Hamiltonen_NZ
dc.date.accessioned2009-06-18T02:29:21Z
dc.date.available2009-06-18T02:29:21Z
dc.date.issued2003
dc.description.abstractRudd (Scardinius erythrophthalmus) is a cyprinid fish native to Europe that was illegally introduced into New Zealand in 1967. Between the 1960s and 1980s rudd were illegally spread to a number of lakes, ponds, and rivers in New Zealand, principally from the Waikato north. They now also occur in the Wanganui, Manawatu, Nelson, and Canterbury regions. Rudd undergo ontogenetic changes in diet as they grow. Young-of-the-year rudd (58–65 mm mean fork length (FL)) ate a mixture of planktonic cladocerans and chironomid pupae, and potentially competed for these foods with common smelt (Retropinna retropinna). Larger rudd (100–149 mm FL) were primarily benthivorous, and potentially competed with perch (Perca fluviatilis) of the same size, brown bullhead catfish (Ameiurus nebulosus), and probably common bullies (Gobiomorphus cotidianus). Rudd of still larger sizes were increasingly herbivorous, until at >200 mm FL their diet was >80% plant material. As rudd prefer native species of aquatic macrophytes to the introduced species, they can probably modify native plant communities and aid the invasion of introduced aquatic weeds. They may also have contributed to the switch of Hamilton Lake from a macrophyte-dominated state to a phytoplankton-dominated state. It is time for the threats posed by rudd to be recognised, and for an education campaign to be mounted. As past rudd introductions have been done outside the law, increasing the severity of penalties for further illegal transfers is unlikely to be effective, and the coarse angling community should instead be included in management decisions concerning rudd.en
dc.format.mimetypeapplication/pdf
dc.identifier.citationHicks, B. J. (2003). Biology and potential impacts of rudd (Scardinius erythrophthalmus L.) in New Zealand. In Munro, R. (Ed). Managing invasive freshwater fish in New Zealand. Proceedings of a workshop hosted by Department of Conservation. 10-12 May 2001, Hamilton, (pp.49-58). Wellington, New Zealand: Department of Conservation.en
dc.identifier.isbn0-478-22423-0
dc.identifier.urihttps://hdl.handle.net/10289/2199
dc.language.isoen
dc.publisherDepartment of Conservationen_NZ
dc.relation.isPartOfManaging invasive freshwater fish in New Zealanden_NZ
dc.relation.urihttp://www.doc.govt.nz/Documents/science-and-technical/PF00prelims.pdf
dc.rightsCopyright May 2003, New Zealand Department of Conservationen
dc.subjectrudden
dc.subjectautecologyen
dc.subjectintroduced fishen
dc.subjectaquatic macrophytesen
dc.titleBiology and potential impacts of rudd (Scardinius erythrophthalmus L.) in New Zealanden
dc.typeConference Contributionen
pubs.begin-page49en_NZ
pubs.elements-id14158
pubs.end-page58en_NZ
pubs.finish-date2001-05-12en_NZ
pubs.place-of-publicationWellingtonen_NZ
pubs.start-date2001-05-10en_NZ
pubs.volumeProceedings of a Workshop Hosted by Department of Conservationen_NZ
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Hicks - Biology and potential impacts.pdf
Size:
109.12 KB
Format:
Adobe Portable Document Format
Thumbnail Image
Name: Hicks - Biology and potential impacts.pdf
Size: 109.12 KB
Kind: Adobe PDF
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.79 KB
Format:
Item-specific license agreed upon to submission
Description:
Name: license.txt
Size: 1.79 KB
Kind: License
Collections
Science and Engineering Papers