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Evaluating the Efficiency of a One‐Square‐Meter Quadrat Sampler for Riffle‐Dwelling Fish
Author(s) -
Peterson James T.,
Rabeni Charles F.
Publication year - 2001
Publication title -
north american journal of fisheries management
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.587
H-Index - 72
eISSN - 1548-8675
pISSN - 0275-5947
DOI - 10.1577/1548-8675(2001)021<0076:eteoao>2.0.co;2
Subject(s) - riffle , cyprinidae , percidae , quadrat , cobble , electrofishing , biology , habitat , sampling (signal processing) , ecology , cottidae , environmental science , fishery , fish <actinopterygii> , perch , transect , sculpin , filter (signal processing) , computer science , computer vision
We evaluated the efficacy of a 1‐m 2 quadrat sampler for collecting riffle‐dwelling fishes in an Ozark stream. We used a dual‐gear approach to evaluate sampler efficiency in relation to species, fish size, and habitat variables. Quasi‐likelihood regression showed sampling efficiency to differ significantly ( P < 0.001) among species of four common fish families (Cyprinidae, Ictaluridae, Cottidae, and Percidae) but not among species within each family ( P > 0.05). Sampling efficiency was significantly influenced by physical habitat characteristics. Mean current velocity negatively influenced sampling efficiencies for Cyprinidae ( P = 0.009), Cottidae ( P = 0.006), and Percidae ( P < 0.001), and the amount of cobble substrate negatively influenced sampling efficiencies for Cyprinidae ( P = 0.025), Ictaluridae ( P < 0.001), and Percidae ( P < 0.001). Water temperature negatively influenced sampling efficiency for Cyprinidae ( P = 0.009) and Ictaluridae ( P = 0.006). Species‐richness efficiency was positively influenced ( P = 0.002) by percentage of riffle sampled. Under average habitat conditions encountered in stream riffles, the 1‐m 2 quadrat sampler was most efficient at estimating the densities of Cyprinidae (84%) and Cottidae (80%) and least efficient for Percidae (57%) and Ictaluridae (31%).