alexa Qualitative and quantitative sampling of lake fish communities
Agri and Aquaculture

Agri and Aquaculture

Fisheries and Aquaculture Journal

Author(s): Donald A Jackson

Abstract Share this page

We demonstrated that estimates of the relative abundance and patterns of covariation for fish species captured in baited minnow traps, plastic traps, fine- and coarse-mesh trap nets, and multimesh gill nets from 43 lakes differed greatly among the gears; contradictory results about species' relative abundance were often provided. We conclude that simple approaches to integrate catches from gears providing an overall estimate of species abundance in communities across lakes are compromised given the inconsistency in estimates of abundance and covariation. We recommend an increased effort towards the use of presence-absence data and their adequate sampling within lake community studies. We used a resampling approach to demonstrate the relative ability of the different gears to detect the presence of species within lakes under various levels of sampling intensity. The variation among lakes and constituent species necessitates the use of multiple gears to adequately detect species composition. Many studies probably underestimate the species composition within lakes given insufficient effort and too restricted use of different sampling gears. The need for increased sampling effort is of particular concern in areas focusing on biodiversity (e.g., species losses) and ecosystem health (e.g., ecological integrity) where failing to detect species may have substantial economic and management implications.

This article was published in Canadian Journal of Fisheries and Aquatic Sciences and referenced in Fisheries and Aquaculture Journal

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version