||Dynamics of Brown Trout (Salmo trutta), and Sculpin (Cottus spp.) Populations as Indicators of Eutrophication.
Smit, Wayne L. ;
||Michigan State Univ., East Lansing. Dept. of Fisheries and Wildlife.
||DI-14-31-0001-3723; OWRR-C-3381 ;OWRR-C-1663-3153; 03904,; C-3381-3723(5)
Marine fishes ;
Jordan River ;
Au Sable River ;
Sex behavior ;
Salmo trutta ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
Brown trout and sculpin populations were studied in three variously perturbed stream sites in northern Michigan. Intraspecific comparisons were made of several aspects of population dynamics including the intrinsic rate of natural increase (r). The upper Jordan River, nearly pristine and with high population densities, exhibited r values judged adequate for maintenance of the populations. The other sites were compared with this baseline. The moderately perturbed lower Jordan River had less population densities and survival but greater mean fecundities for both species. (Modified author abstract)