The NOAA IR serves as an archival repository of NOAA-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by NOAA or funded partners.
As a repository, the NOAA IR retains documents in their original published format to ensure public access to scientific information.
i
Comparison of Two Fish Sampling Techniques for Low‐Conductivity, Lowland Headwater Streams
-
2021
-
-
Source: North American Journal of Fisheries Management, 41(6), 1781-1788
[PDF-194.46 KB]
Details:
-
Journal Title:North American Journal of Fisheries Management
-
Personal Author:
-
NOAA Program & Office:
-
Description:Despite being common, low‐conductivity (<70 µS/cm), headwater streams are often understudied compared with larger waters that support recreational and commercial fisheries. However, recent conservation efforts that have focused on native, nongame species have created the need to develop and test sampling methods in these habitats. We compared a novel combination of gears (electrofishing coupled with kick‐seining) to three‐pass electrofishing for sampling fish assemblages in low‐conductivity streams. At each site, each method was used to sample separate reaches equal to 35‐fold the mean stream width. We compared CPUE and species richness between the two methods and used logistic regression to estimate the probability of capturing a new species on the second and third passes when electrofishing. We calculated the capture probabilities for the most common species encountered using the Carle–Strub depletion method, with the three‐pass electrofishing data. When compared with the combination method, three‐pass electrofishing resulted in significantly greater CPUE and species richness (0.21 vs. 0.13 fish/m2 and 7.24 vs. 5.00 species, respectively). There was a 67% probability of capturing a new species on the second pass and 30% probability of capturing a new species on the third pass when using three‐pass electrofishing. The capture probabilities ranged from 0.50 to 0.87 for the 13 species examined. The use of kick‐seining after a single electrofishing pass provided no benefit compared with additional electrofishing passes. We recommend making at least three passes while electrofishing when estimating relative abundance and species richness in low‐conductivity wadeable streams.
-
Keywords:
-
Source:North American Journal of Fisheries Management, 41(6), 1781-1788
-
DOI:
-
ISSN:0275-5947;1548-8675;
-
Format:
-
Publisher:
-
Document Type:
-
Rights Information:Accepted Manuscript
-
Compliance:Library
-
Main Document Checksum:
-
Download URL:
-
File Type:
