Results 111 to 120 of about 312,952 (138)

Distribution, Transformation, and Long-Term Accumulation of Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Different Tissues of Fish and Piscivorous Birds

Ecotoxicology and Environmental Safety, 2000
The present study monitored 10-year-old fish and piscivorous birds from sites contaminated for many Stars. The data reflected the results of actual, long-term environmental exposures, The results demonstrate that different tissues of fish have quite ...
W Z Wu, W Z Wu, K -W Schramm
exaly   +3 more sources

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FEEDING ECOLOGY OF PISCIVOROUS BIRDS AT LAKE ST LUCIA, Part 1: Diving Birds

Ostrich, 1978
Alan Whitfield
exaly   +2 more sources

ESTIMATION OF THE DAILY FOOD INTAKE OF PISCIVOROUS BIRDS

Ostrich, 1972
exaly   +2 more sources

Ecological constraints on digestive physiology in carnivorous and piscivorous birds

Journal of Experimental Zoology, 1999
Digestion strategies of meat- and fish-eating birds have received little attention, and the assumption has generally been made that there is rather little variation in digestion parameters between species in these guilds. We show that there is significant though small variation between species in apparent absorption efficiency.
G.M. Hilton, D.C. Houston, N.W.H. Barton, R.W. Furness, G.D. Ruxton   +4 more
openaire   +1 more source

ECOSYSTEM-BASED MANAGEMENT OF PREDATOR–PREY RELATIONSHIPS: PISCIVOROUS BIRDS AND SALMONIDS

Ecological Applications, 2008
Predator-prey relationships are often altered as a result of human activities. Where prey are legally protected, conservation action may include lethal predator control. In the Columbia River basin (Pacific Northwest, USA and Canada), piscivorous predators have been implicated in contributing to a lack of recovery of several endangered anadromous ...
Francis K, Wiese, Julia K, Parrish, Christopher W, Thompson, Christina, Maranto   +3 more
openaire   +2 more sources

Interactions in the Utilisation of small Fish by Piscivorous Fish and Birds, and the Fishery in Ijsselmeer

2003
Mous, P.J., Dekker, W., de Leeuw, J.J., van Eerden, M.R., van Densen, W.L.T.   +4 more
exaly   +2 more sources

Digeneans Collected from Piscivorous Birds in North Carolina, U.S.A

Comparative Parasitology, 2004
During investigations of digenetic fluke diseases of aquaculture fish, 11 digeneans (Apharyngostrigea simplex, Apharyngostrigea cornu, Diplostomum compactum, Diplostomum spathaceum, Posthodiplostomum minimum, Hysteromorpha triloba, Clinostomum marginatum, Drepanocephalus spathans, Mesorchis denticulatus, Microparyphium facetum, and Notocotylus pacifera)
James R. Flowers, Matthew F. Poore, Jim E. Mullen, Michael G. Levy   +3 more
openaire   +1 more source

Liver and Breast Feather Mercury in Piscivorous Birds of the Caspian Sea: Monitoring Changes

Bulletin of Environmental Contamination and Toxicology, 2011
Mercury in the liver and breast feathers of the Common Cormorant, and in three species of Grebes from the southern coast of the Caspian Sea, were determined. The Common Cormorant had significantly more mercury in its tissues (liver: 8.5 ± 1.5; feather 8 ± 1 mg/kg dry weight) than Grebes (Great Crested Grebe: 3 ± 0.5, 8 ± 1.5; Black-necked Grebe: 3 ± 0 ...
F, Rajaei, A, Esmaili Sari, M, Savabieasfahani, N, Bahramifar, M, Ghasempouri   +4 more
openaire   +2 more sources

Commensal association of piscivorous birds with foraging Eurasian otters in Spain

2020
Positive interactions among species are widespread in nature. In a foraging context, these interactions may consist of local enhancement, when an individual uses cues from individuals of another species to locate food, or facilitation when food is made more readily available by the individuals of other species. Facilitation may evolve as mutualism when
Rodríguez Ramiro, Jonathan, Mougeot, François   +1 more
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Recovery of infectious pancreatic necrosis virus from the faeces of wild piscivorous birds

Aquaculture, 1992
Abstract Faecal samples were collected from wild birds frequenting salmonid fish hatcheries to determine if birds excrete infectious pancreatic necrosis (IPN) virus in their faeces. Samples were collected from early June through early September. IPN virus was detected in faeces from herons, mallards, and other birds at titres similar to the titres ...
P.E. McAllister, W.J. Owens
openaire   +1 more source