Evaluation of a Common Carp (Cyprinus carpio L.) Exclusion and Trapping Device for Use in Aquatic Plant Founder Colony Establishment Page: 24
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Because of sampling difficulties with the original design, all twelve common carp trap
funnel openings were refitted to allow for their removal during sampling. The larger opening
was modified to measure 46-cm x 51-cm, with 65-cm x 15-cm flanges. This allowed each funnel
to be firmly attached with cable ties to the exclosure during trapping periods, but be easily
removed during data collection. Wire-mesh bracing was also added to each funnel to prevent
sagging (Figure 13).Figure 13. Funnel design with braces indicated by red arrows.
Although attaching fingers to the small opening of funnels was shown to be the most
effective means of capturing and retaining common carp, after five collection periods many of
the steel fingers were severely damaged and no longer functional. Some had been bent out of
place by the sweeping motion made while using the dip nets, while others had simply
deteriorated to the point of being ineffective at keeping trapped common carp from escaping.24
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Williams, Paul Edwin. Evaluation of a Common Carp (Cyprinus carpio L.) Exclusion and Trapping Device for Use in Aquatic Plant Founder Colony Establishment, thesis, May 2008; Denton, Texas. (https://digital.library.unt.edu/ark:/67531/metadc6038/m1/32/: accessed April 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; .