J. Howard Kerby

Morphometric Characters Of Two Morone Hybrids

Morphometric ratios of female striped bass (Marone saxatilis) X male white bass (M. chrysops) and female striped bass X male white perch (M. americana) that were best for distinguishing them from the parental species were: standard length/ body depth, head length/second anal spine length, head length/fourth dorsal spine length, standard length/fork length, fork length/total length, second anal spine length/third anal spine length and head length/upper jaw length. Ratios were generally intermediate between those of the parental species, but sometimes differed from those of either parent....

Year
1979

Growth And Survival Of Striped Bass And Striped Bass Xwhite Perch Hybrids

Experiments comparing growth and survival of striped bass (Morvne saxatilis) and striped bass4? X white perch (M. americana) chybrids indicated the hybrids were hardier than striped bass under the same experimental conditions. Striped bass exhibited health problems and resulting mortality which were not evident in the hybrids. Overall survival of striped bass in 2 replicate experiments was 42.5% after II months. whereas that of the hybrids was 84.2%. Striped bass and hybrid growth patterns were similar, but striped bass grew somewhat more rapidly than the latter. Mean specific (...

Year
1978

Currituck Sound Fish Populations Before And After Infestation By Eurasian Water·milfoil

Data collected from rotenone samples of 3 coves before (1959-65) and after (1977) infestation by Eurasian water-milfoil (Myriophyllum spicatum) were compared to document changes in the fish populations. Using the mean of the 3 areas for comparison, both weight and number per hectare increased after water-milfoil infestation. The average weight per individual decreased from 0.02 kg (1959-65) to 0.008 kg (1977). The species were separated into 7 groups. Six of the groups had higher mean numbers per hectare and all groups had higher mean weights per hectare. Multivariate analyses of variance...

Year
1978