Results 11 to 20 of about 312,952 (138)
Impacts of piscivorous birds on salmonid populations and game fisheries in Scotland: a review [PDF]
Wildlife Biology, 2008 Abstract The Scottish populations of salmonids are important both ecologically and economically. Game fisheries for Atlantic salmon Salmo salar, sea trout Salmo trutta trutta and brown trout Salmo trutta fari are all highly acclaimed and generate substantial levels of income for Scotland, but many populations are in decline and ...
Harris, Catriona +3 more
core +6 more sources
, 2021 The ecological communities we observe today are a product of the bidirectional interactions between ecological and evolutionary processes. Although the effects of ecological processes on population divergence and speciation have been studied extensively, far less is known about the effects of divergence and speciation on ecological dynamics.
Söderlund, Erik
core +4 more sources
White feathers in black birds [PDF]
, 2021 The most common plumage abnormalities in birds involve some form of white feathering, ranging from birds with just a few white feathers to individuals that are completely white.
van Grouw, Hein
core +5 more sources
Connectivity between migrating and landlocked populations of a diadromous fish species investigated using otolith microchemistry. [PDF]
PLoS ONE, 2013 Smelt Osmerus eperlanus has two different life history strategies in The Netherlands. The migrating population inhabits the Wadden Sea and spawns in freshwater areas.
Ingrid Tulp +5 more
doaj +1 more source
Frontiers in Sustainable Food Systems, 2022 Waterbirds cause substantial fish-stock losses in open aquaculture systems, particularly in developing countries where fish-ponds are smaller and predator control methods largely manual or under-resourced.
Nickson Erick Otieno, Erick Shidavi
doaj +1 more source
The influence of meal size on prey
Molecular Ecology Resources, 2017 AbstractMolecular methods allow noninvasive assessment of vertebrate predator–prey systems at high taxonomic resolution by examining dietary samples such as faeces and pellets. To facilitate the interpretation of field‐derived data, feeding trials, investigating the impacts of biological, methodological and environmental factors on prey DNA detection ...
Bettina Thalinger +3 more
openaire +2 more sources
Frontiers in Microbiology, 2023 Soil microorganisms and free-living nematodes were investigated in association with the nesting and roosting habitats of the following piscivorous and omnivorous colonial birds: black kite (Milvus migrans), great cormorant (Phalacrocorax carbo), black ...
Stanislav Pen-Mouratov, Tamar Dayan
doaj +1 more source
Journal of the World Aquaculture Society, 2023 Bolbophorus damnificus is a digenetic trematode causing significant economic losses within the United States commercial catfish industry. The indirect life cycle is complex, requiring piscivorous birds, aquatic snails, and fish to complete.
Bradley M. Richardson +6 more
doaj +1 more source
Essential trace (Zn, Cu, Mn) and toxic (Cd, Pb, Cr) elements in the liver of birds from Eastern Poland [PDF]
Acta Veterinaria, 2012 We have focused our study on the concentrations of essential heavy metals (Zn, Cu and Mn) and non-essential trace metals (Pb, Cd and Cr) in the livers of birds from Eastern Poland. The largest mean amount of Zn - as much as 279 mg/kg dry mass (d.m.) -
Komosa A., Kitowski I., Komosa Z.
doaj +1 more source
Survey of some wild birds and their feeding habits in three types at Assiut governorate, Egypt [PDF]
Archives of Agriculture Sciences Journal, 2020 The habitat is important for living organisms in terms of food and shelter that it provides. To understand the impact of anthropogenic pressure on the feeding habits of the birds, one-year survey was conducted in three old areas at Assiut governorate ...
M. Omar
doaj +1 more source