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: 41540
Various fish species as biological control agents for the dark rice field mosquito in Arkansas rice fields
During the summers of 1972–73, 10 fish species were evaluated as predators against larvae of the dark rice field mosquito, Psorophora confinnis (Lynch-Arribalzaga), near Stuttgart, Ark. Stocking rates were 0.02, 0.03, and 0.06 fish/ft 2 . At the lowest stocking rate green sunfish, Lepomis cyanellus Rafinesque, reduced larval numbers by 89.7% and were significantly more effective than adult mosquit
Authors
R. B. Davey, M. V. Meisch, D. L. Gray, J. M. Martin, Kermit E. Sneed, F. J. Williams
An improved procedure for diagnosing kidney disease in salmonid fishes
No abstract available.
Authors
G. L. Bullock, H. M. Stuckey
Serological diagnosis of corynebacterial kidney disease of salmonids
No abstract available.
Authors
P. K. Chen, G. L. Bullock, H. M. Stuckey, A.C. Bullock
Notes on the culture of striped bass in tanks and small raceways
No abstract available.
Authors
K.O. Allen
Myxosoma cerebralis: comparative sensitivity of spore detection methods
No abstract available.
Authors
M.E. Markiw, K. Wolf
Effects of stocking density and water exchange rate on growth and survival of channel catfish Ictalurus punctatus (Rafinesque) in circular tanks
Channel catfish were cultured for 177 days in circular tanks containing 1.6 m3 of water at combinations of five stocking densities (90–720 fish/m3) and five water exchange rates (2.0–0.5 h per exchange). Net yield increased as stocking density increased up to 540 fish/m3 then declined at higher densities. Mean fish weight, feed conversion efficiency and survival all declined as stocking density in
Authors
Kenneth O. Allen
Aging tricolored blackbirds by cranial ossification
No abstract available.
Authors
R. W. DeHaven, F.T. Crase, M. R. Miller
Seasonal water potential changes in Sonoran Desert shrubs in relation to topography
Water potential in Sonoran Desert shrubs was recorded from September 1968 through September 1969. Special attention was paid to recording maximum and minimum potentials on a seasonal basis and diurnal fluctuations during the wettest and driest periods of the year. Franseria deltoidea developed the lowest potential (—85 bar) of the shrubs recorded and also showed the greatest degree of response to
Authors
William L. Halvorson, Duncan T. Patten
Geographic distribution: Masticophis bilineatus
No abstract available.
Authors
P.A. Medica, B.G. Maza
An unusual breeding aggregation of frogs, with notes on the ecology of Agalychnis spurrelli (Hylidae: Anura)
No abstract available.
Authors
N. J. Scott, A. Starrett
Internal dosimetry in small vertebrates resident in a fallout field
No abstract available.
Authors
R.K. Mullen, P.A. Medica