In 1985, we trapped more than 18,000 crayfish, of which 72% were adult males. Trapping had minor effect on the young-of-the-year crayfish. In 1986, the crayfish population was reduced by 98%, predation by largemouth bass being the probable major cause of the reduction....
In late summers of 1985 and 1986, the efficacies of two commercially manufactured crayfish baits (one each in block and pelleted form) and dead fish as attractants for trapping the mud crayfish Orconectes immunis were assessed in a small Wisconsin lake (area, 5.7 hectares; maximum depth, 6 ...
63,64, those studies examined a limited number of crayfish species and found haplotypes that had been previously isolated in Europe and Japan (i.e., a or b-haplotypes)33,62,63,64. Likewise, we confirmed the presence in North America of two haplotypes (a- and d2-haplotypes) first describ...
In late summers of 1985 and 1986, the efficacies of two commercially manufactured crayfish baits (one each in block and pelleted form) and dead fish as attractants for trapping the mud crayfish Orconectes immunis were assessed in a small Wisconsin lake (area, 5.7 hectares; maximum depth, 6 ...
A population would be expected to be detectable in a survey by trapping within five years if the site was relatively small and/or there was wide coverage of the site. Any small inflows and outflows also needed to be assessed for their potential to support crayfish, including those too ...