Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41771
Vitamin E and selenium interrelations in the diet of Atlantic salmon (Salmo salar): Gross, histological and biochemical deficiency signs
Either simultaneous or separate dietary deficiencies of vitamin E and selenium in Atlantic salmon during first 4 weeks of feeding caused twice the mortality shown in fish fed both supplemental vitamin E (0.5 IU/g dry diet) and selenium (0.1 µg/g). Subsequent dietary repletion with both vitamin E and selenium significantly reduced mortality during the following 2 weeks. Larger salmon (0.9 g initial
Authors
Hugh A. Poston, G. F. Combs, Louis Leibovitz
Feeding algae to fish
Aquarium-held bigmouth buffalo Ictiobus cyprinellus (Valenciennes) were fed the blue-green alga Spirulina platensis (Nordstedt) at a daily rate of 29 g dry weight/kg body weight for 28 days. Daily growth was 14 g/kg body weight, and food conversion was 2.0. Tilapia aurea (Steindachner) also was fed this blue-green alga; growth and food conversion were similar to those found for bigmouth buffalo. F
Authors
Jon G. Stanley, J. B. Jones
A review of methods for obtaining monsex fish and progress report on production of monsex white amur
No abstract available.
Authors
J.G. Stanley
Female homogamety in grass carp (Ctenopharyngodon idella) determined by gynogenesis
Gynogenesis occurred in eggs of grass carp (Ctenopharyngodon idella) treated with X-irradiated milt from goldfish (Carassius auratus). Gynogenetic offspring were females, which indicates functional female homogamety in grass carp. Five of these gynogenetic fish were used as an egg source for a second generation of artificially gynogenetic fish. The percentage yield in this second generation was ab
Authors
Jon G. Stanley
Morphology of androgenetic and gynogenetic grass carp, Ctenopharyngodon idella (Valenciennes)
No abstract available.
Authors
J.C. Stanley, C.J. Biggers, D.E. Schultz
Production of hybrid, androgenetic, and gynogenetic grass carp and carp
No abstract available.
Authors
J.G. Stanley
Infection and mortality in captive wild-trapped canvasback ducks
Fungal, bacterial and malarial infections, as well as malnutrition caused heavy mortality in a group of wild-trapped canvasbacks (Aythya valisineria) held in 10 × 3 × 2 m open water pens. Deaths occurred between 21 and 158 days after confinement and were associated with infections of Aspergillus fumigatus, Escherichia coli, Staphylococcus sp., Streptococcus sp., Klebsiella sp., Enterobacter sp., a
Authors
R. M. Kocan, M. C. Perry
Fish diseases and parasites in relation to the environment
Although some diseases are not affected by subtle environmental changes, others are. Factors which may influence infection or the course of disease are: temperature, gaseous supersaturation, oxygen deficiency, mechanical and physiological trauma of the fish, malappropriate water chemistry, pollution, eutrophication, media for spore retention, and presence of intermediate hosts. Aviatminoses and ne
Authors
G. L. Hoffman