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Effect of bait and gear type on channel catfish catch and turtle bycatch in a reservoir

Journal of Freshwater Ecology

By:
, , and ORCID iD
https://doi.org/10.1080/02705060.2014.966165

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Abstract

Hoop nets have become the preferred gear choice to sample channel catfish Ictalurus punctatus but the degree of bycatch can be high, especially due to the incidental capture of aquatic turtles. While exclusion and escapement devices have been developed and evaluated, few have examined bait choice as a method to reduce turtle bycatch. The use of Zote™ soap has shown considerable promise to reduce bycatch of aquatic turtles when used with trotlines but its effectiveness in hoop nets has not been evaluated. We sought to determine the effectiveness of hoop nets baited with cheese bait or Zote™ soap and trotlines baited with shad or Zote™ soap as a way to sample channel catfish and prevent capture of aquatic turtles. We used a repeated-measures experimental design and treatment combinations were randomly assigned using a Latin-square arrangement. Eight sampling locations were systematically selected and then sampled with either hoop nets or trotlines using Zote™ soap (both gears), waste cheese (hoop nets), or cut shad (trotlines). Catch rates did not statistically differ among the gear–bait-type combinations. Size bias was evident with trotlines consistently capturing larger sized channel catfish compared to hoop nets. Results from a Monte Carlo bootstrapping procedure estimated the number of samples needed to reach predetermined levels of sampling precision to be lowest for trotlines baited with soap. Moreover, trotlines baited with soap caught no aquatic turtles, while hoop nets captured many turtles and had high mortality rates. We suggest that Zote™ soap used in combination with multiple hook sizes on trotlines may be a viable alternative to sample channel catfish and reduce bycatch of aquatic turtles.

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Additional publication details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effect of bait and gear type on channel catfish catch and turtle bycatch in a reservoir
Series title:
Journal of Freshwater Ecology
DOI:
10.1080/02705060.2014.966165
Volume:
30
Issue:
3
Year Published:
2014
Language:
English
Publisher:
Taylor & Francis
Contributing office(s):
Coop Res Unit Atlanta
Description:
9 p.
First page:
407
Last page:
415
Country:
United States
State:
Oklahoma
Other Geospatial:
Lake McMurty
Online Only (Y/N):
N
Additional Online Files (Y/N):
N