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the same species were sometimes subsampled for measurements. Larger fishes <br />were also weighed to the nearest gram, and scales and/or pectoral rays were <br />usually removed for age determination. Scales were removed from selected <br />fish midway between the lateral line and the anterior margin of the dorsal <br />fin. Additional measurements were made of selected specimens for taxonomic <br />work. Stomachs of larger fish killed during collections were removed, <br />preserved and returned to the laboratory for analysis. Since carp and <br />suckers were rarely killed by electrofishing, a subsample of these fishes <br />representing the length range within the sample was sacrificed at each <br />station. Only a few game fish were sacrificed during each sampling effort <br />to avoid reductions in their populations. Entire alimentary tracts of <br />cyprinids and catostomids were preserved in 10% formalin, but only the <br />stomach and esophagus of salmonids were retained. Notes were often made <br />of sex, reproductive state and unusual characters. Methods of gamete <br />collection and artificial fertilization were similar to those described by <br />Dobie et al. (1956). <br />Disposition of preserved fishes <br />Specimens 50 mm TL or less were sorted according to size and <br />source for inclusion in developmental, voucher, and reference series. The <br />series were deposited with the Laboratory for the Identification and Study <br />of North America's Freshwater Larval Fishes at Colorado State University's <br />Department of Fishery and Wildlife Biology (CSU-DFWB). Voucher series <br />will also be deposited with the Fish and Wildlife Service Museum in Fort <br />Collins, Colorado. Excess specimens and specimens over 50 mm TL were <br />catalogued and retained. <br />37 <br />