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Full-Text Articles in Life Sciences
Survival Of Escherichia-Coli And Salmonella Spp In Estuarine Environments, Mw Rhodes, Hi Kator
Survival Of Escherichia-Coli And Salmonella Spp In Estuarine Environments, Mw Rhodes, Hi Kator
VIMS Articles
Survival of Escherichia coli and Salmonella spp. in estuarine waters was compared over a variety of seasonal temperatures during in situ exposure in diffusion chambers. Sublethal stress was measured by both selective-versus-resuscitative enumeration procedures and an electrochemical detection method. E. coli and Salmonella spp. test suspensions, prepared to minimize sublethal injury, were exposed in a shallow tidal creek and at a site 7.1 km further downriver. Bacterial die-off and sublethal stress in filtered estuarine water were inversely related to water temperature. Salmonella spp. populations exhibited significantly less die-off and stress than did E. coli at water temperatures of <10°C. Although the most pronounced reductions (ca. 3 log units) in test bacteria occurred during seasonally warm temperatures in the presence of the autochthonous microbiota, 102 to 104 test cells per ml remained after 2 weeks of exposure to temperatures of >15°C. Reductions …
Pipefish Foraging: Effects Of Fish Size, Prey Size And Altered Habitat Complexity, Ch Ryer
Pipefish Foraging: Effects Of Fish Size, Prey Size And Altered Habitat Complexity, Ch Ryer
VIMS Articles
Laboratory experiments determined the effects of 2 levels of habitat complexity upon pipefish Syngnathus fuscus foraging for amphipods. Habitats were composed of equal densities of either narrow (low complexity) or wide (high complexity) leafed artificial seagrass. Response to habitat - as measured by rate of encounter with amphipods, probability of attack after encounter, probability of success after attack, and overall rate of amphipod consumption - was determined for combinations of 2 fish size classes and 3 amphipod size classes. Small fish did not respond to changes in habitat complexity, while large fish did. Large fish encountered fewer amphipods in the …
Subsurface Chlorophyll Maximum In August-September 1985 In The Climax Area Of The North Pacific, Rw Eppley, E Swift, Dg Redalje, Mr Landry, Lw Haas
Subsurface Chlorophyll Maximum In August-September 1985 In The Climax Area Of The North Pacific, Rw Eppley, E Swift, Dg Redalje, Mr Landry, Lw Haas
VIMS Articles
No abstract provided.