Download the full-sized PDF of The effectiveness of two common sampling methods for assessing imperilled freshwater fishesDownload the full-sized PDF



Permanent link (DOI):


Export to: EndNote  |  Zotero  |  Mendeley


This file is in the following communities:

Renewable Resources, Department of


This file is in the following collections:

Journal Articles (Renewable Resources)

The effectiveness of two common sampling methods for assessing imperilled freshwater fishes Open Access


Author or creator
Poos, M.S.
Mandrak, N.E.
McLaughlin, R.L.
Additional contributors
Recovery plans
Resource management
Water Chemistry
Sampling efficiency
Species at risk
Type of item
Journal Article (Published)
This study tested the hypothesis that the most common gear type used to sample fishes in wadeable systems, electrofishing, was more effective than another commonly used gear type, seining, for sampling fish species at risk. Five predictions were tested. At sites where species at risk were detected, (1) the probability of detecting the species at risk, (2) the probability of only one gear type detecting the species at risk and (3) the estimated catch per unit effort of the species at risk, was as high as, or higher, when using electrofishing than when using a seine. (4) The number of sample sites required to detect a species at risk within a watershed and (5) the number of subsections required to detect a species at risk within a site, were as low as, or lower, using. electrofishing than the number required using a seine. Based on analyses of these measurements, electrofishing was a more effective gear type than seining for sampling fish species at risk, irrespective of the unit (presence or absence or catch per unit effort) or scale of measurement (watershed or site level). Dissolved oxygen, turbidity, specific conductivity and nitrate concentrations were measured at each site and did not account for the between gear differences. Selection of sampling gear can be a fundamental consideration for the assessment of fish species at risk, where, unlike common species, they may be particularly influenced by small population sizes, restricted geographic ranges and narrow habitat preferences. Resource managers must weigh differences in the risks of injury of fish species at risk against differences in the effectiveness of each gear type when deciding between gear types and the utility of the assessments they represent. (c) 2007 crown copyright.
Date created
License information
© 2007 Wiley-Blackwell. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Poos, M.S., Mandrak, N.E., & McLaughlin, R.L. (2007). The effectiveness of two common sampling methods for assessing imperilled freshwater fishes. Journal of Fish Biology, 70(3), 691-708. DOI: 10.1111/j.1095-8649.2007.01349.x.
Link to related item

File Details

Date Uploaded
Date Modified
Audit Status
Audits have not yet been run on this file.
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 473830
Last modified: 2015:10:12 11:07:53-06:00
Filename: JFB_70_2007_1.pdf
Original checksum: 16508ae7e1d22fa5077e63297114f70f
Well formed: true
Valid: true
File title: jfb_1349 1..19
Page count: 20
Activity of users you follow
User Activity Date