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Partial replacement of fish meal with spray-dried blood powder to reduce phosphorus concentrations in diets for juvenile rainbow trout, Oncorhynchus mykiss (Walbaum) Partial replacement of fish meal with spray-dried blood powder to reduce phosphorus concentrations in diets for juvenile rainbow trout, Oncorhynchus mykiss (Walbaum)

Feeds formulated with 5.7, 11.4 and 22.7% spray-dried blood powder, also called blood flour (88.1% protein, 0.2% total phosphorus), were compared with a control diet with 49% herring meal (64% protein, 2.1% total phosphorus) and no blood powder for rearing juvenile rainbow trout. Oncorhynchus my kiss (Walbaum). Diets with 5.7, 11.4 and 22.7% blood powder contained 1.22,1.03 and 0.84%...
Authors
J. M. Luzier, R.C. Summerfelt, H. G. Ketola

Influence of fish oils in production catfish feeds on selected disease resistance factors Influence of fish oils in production catfish feeds on selected disease resistance factors

Healthy channel calfish, Ictalurus punctatus (mean weight: 62.5g), were fed two production feeds that were identical except for the lipid portion, which was either catfish oil or menhaden oil. Fish were held at 18 or 28°C and fed the experimental feeds for four monlhs. A subsample of fish from each of the four treatments was then used to measure scrum antibody titers to Edwardsiella...
Authors
J.T. Lingenfelser, V. S. Blazer, J. Gay

Effect of seasonally changing feeding habits on whole-animal mercury concentrations in Hydropsyche morosa (Trichoptera: Hydropsychidae) Effect of seasonally changing feeding habits on whole-animal mercury concentrations in Hydropsyche morosa (Trichoptera: Hydropsychidae)

Food habits, net-spinning activity, and whole-animal mercury concentrations in Hydropsyche morosa Hagan were examined monthly over a one year period on the South River, Virginia. Gut content analysis revealed seasonal patterns in the consumption of food that was correlated with net-spinning activity. Between April and October, when feeding nets were widespread, detritus represented...
Authors
C.D. Snyder, A.C. Hendricks

Dose-response effects of recombinant bovine somatotrop (Posilac) on growth performance and body composition of two-year-old rainbow trout (Oncorhynchus mykiss) Dose-response effects of recombinant bovine somatotrop (Posilac) on growth performance and body composition of two-year-old rainbow trout (Oncorhynchus mykiss)

Two hundred rainbow trout (Oncorhynchus mykiss, mean weight 301.5 g) were allotted to four treatments with five replicates in a randomized block design to determine the dose-response effects of recombinant bovine somatotropin (rbST; PosilacTM) on growth performance and carcass composition. Treatments were sham-injected controls (S), 10 µg/g BW of rbST (L), 20 µg/g BW of rbST (M), and 30...
Authors
M.J. Garber, K.G. DeYonge, J.C. Byatt, W.A. Lellis, D. C. Honeyfield, R.C. Bull, G.T. Schelling, R.A. Roeder

Large wave at Daytona Beach, Florida, explained as a squall-line surge Large wave at Daytona Beach, Florida, explained as a squall-line surge

On a clear calm evening during July 1992, an anomalously large wave, reportedly 6 m high struck the Daytona Beach, Florida area. It is hypothesized that a squall line and associated pressure jump, travelling at the speed of a free gravity wave, coupled resonantly with the sea surface forming the large wave or "squall-line surge'. The wave was forced along the length of the squall line...
Authors
A. H. Sallenger, J. H. List, G. Gelfenbaum, R. P. Stumpf, M. Hansen

Vanishing lands: Sea level, society and Chesapeake Bay Vanishing lands: Sea level, society and Chesapeake Bay

No abstract available at this time
Authors
S.P. Leatherman, R. Chalfont, E.C. Pendleton, T.L. McCandless, S. Funderburk
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