CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Marine & Freshwater Research   
Marine & Freshwater Research
Journal Banner
  Advances in the Aquatic Sciences
blank image Search
blank image blank image
blank image
  Advanced Search

Journal Home
About the Journal
Editorial Board
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Research Fronts
Sample Issue
For Authors
General Information
Instructions to Authors
Submit Article
Open Access
For Referees
General Information
Review an Article
Referee Guidelines
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter youtube


Article << Previous     |     Next >>   Contents Vol 46(8)

Effect of carp, Cyprinus carpio L., an exotic benthivorous fish, on aquatic plants and water quality in experimental ponds

J Roberts, A Chick, L Oswald and P Thompson

Marine and Freshwater Research 46(8) 1171 - 1180
Published: 1995


The effects of carp, Cyprinus carpio L., on water quality and functioning of aquatic systems were investigated in two experiments in ponds (~90 cm deep) outdoors at Griffith, New South Wales. The experiments represented contrasting conditions of high and low impact, defined by stocking density and food availability, with stocking densities chosen to be above and below 450 kg ha-1, the stocking density suggested as a critical threshold for damage. Under high impact conditions, carp had a significant effect on water quality, habitat structure and pond physical characteristics. Turbidity increased from approximately 7 NTU to 26 and 73 NTU by Day 4, there was a complete loss of two out of five plant species tested (Chara fibrosa and Vallisneria sp.) by Day 6, and surface water temperature in ponds with carp was significantly greater by Day 7. Plant loss was attributed to uprooting rather than herbivory, as sometimes reported. Under low impact conditions the uprooting rate of Vallisneria was reduced to a third. Contrary to the results of previous studies, there was no evidence of increased nutrients or greater algal biomass in ponds with carp, but this may have been because the sediments were relatively low in phosphorus. A crude nutrient budget based on water concentrations and tissue analysis showed substantial growth of carp in 20 days that could be accounted for only by considering either sediments or terrestrial inputs (ponds were not covered) as an important food source.

Full text doi:10.1071/MF9951171

© CSIRO 1995

blank image
Subscriber Login

PDF (787 KB) $25
 Export Citation
Legal & Privacy | Contact Us | Help


© CSIRO 1996-2014