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Stocking of hatchery-reared striped bass in the Patuxent River, Maryland: survival, relative abundance, and cost-effectiveness Stocking of hatchery-reared striped bass in the Patuxent River, Maryland: survival, relative abundance, and cost-effectiveness

Hatchery-reared fingerlings of striped bass Morone saxatilis were tagged, stocked, and recovered in the Patuxent River, Maryland, to estimate their survival and abundance relative to wild young of the year and to compare the costs and benefits of stocking phase-I (35–50 mm, total length) and phase-II (150–200 mm) fish. About 100,000 phase-I fingerlings were tagged and released each year...
Authors
R.M. Dorazio, B.M. Florence, C.M. Wooley

The status of the Red Hills salamander Phaeognathus hubrichti, Alabama, USA, 1976–1988 The status of the Red Hills salamander Phaeognathus hubrichti, Alabama, USA, 1976–1988

A total of 144 sites in the Red Hills Physiographic Province in south-central Alabama, USA, were surveyed in 1988 for burrows of the Red Hills salamander Phaeognathus hubrichti. Of 92 sites surveyed in 1976, no change occurred in the habitat at 54 sites, conditions improved at 19 sites and deteriorated at 18 sites following selective or clear cutting. An additional 14 of 52 sites not...
Authors
C.K. Dodd

Distribution patterns of individually identifiable West Indian manatees (Trichechus manatus) in Florida Distribution patterns of individually identifiable West Indian manatees (Trichechus manatus) in Florida

Photographs of distinctively scarred manatees (Trichechus manatus) were taken at aggregation sites throughout Florida and assembled into a catalog for identifying individuals. Resightings of known manatees in different years or at different locations enabled us to document site fidelity and long-distance movements. Of the 891 individuals included in the catalog as of August 1986, 470 (53...
Authors
J.P. Reid, G. B. Rathbun, J.R. Wilcox

An intergeneric hybrid of a native minnow, the golden shiner, and an exotic minnow, the rudd An intergeneric hybrid of a native minnow, the golden shiner, and an exotic minnow, the rudd

The hybrid golden shiner Notemigonus crysoleucas × rudd Scardinius erythrophthalmus is the first known nonsalmonid, intergeneric hybrid of an exotic species and a North American native species. The cross is also the first valid record of a viable hybrid involving the native golden shiner. Meristic and mensural characters of 30 artificially produced hybrids of male golden shiners and...
Authors
N.M. Burkhead, J.D. Williams

Evaluation of a mark-recapture method for estimating mortality and migration rates of stratified populations Evaluation of a mark-recapture method for estimating mortality and migration rates of stratified populations

We simulated mark–recapture experiments to evaluate a method for estimating fishing mortality and migration rates of populations stratified at release and recovery. When fish released in two or more strata were recovered from different recapture strata in nearly the same proportions, conditional recapture probabilities were estimated outside the [0, 1] interval. The maximum likelihood...
Authors
R.M. Dorazio, P.J. Rago
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