Results 51 to 60 of about 7,920 (201)
Parasites and non-fish predators of tilapia with particular reference to the sustainable management of fisheries of Lake Kainji Nigeria [PDF]
, 2001 The fisheries of Lake Kainji, Nigeria, experienced a boom year following impoundment, then decline post impoundment and now is in a period of stabilisation of the fish resources. Several reasons have been advanced on factors responsible for these changes,
Obiekezie, A. +2 more
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PLoS ONE, 2022 We investigated the cumulative effects of predation by piscivorous colonial waterbirds on the survival of multiple salmonid (Oncorhynchus spp.) populations listed under the U.S.
Allen F Evans +5 more
doaj +1 more source
Half a Century of Per‐ and Polyfluoroalkyl Substances in Northern Gannet Eggs: Impact of Regulations
Journal of Applied Toxicology, EarlyView.ABSTRACT Per‐ and polyfluoroalkyl substances (PFAS), known as “forever chemicals”, are persistent organic pollutants that have been widely used in the industry across the globe for many decades. Their chemical stability, bioaccumulation, and toxicity pose major environmental and health risks. This study examines temporal trends in the concentrations of
Anaïs Fournier +2 more
wiley +1 more source
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
openaire +2 more sources
River Research and Applications, EarlyView.ABSTRACT Salmonid fishes typically express anadromy. During their juvenile riverine emigration, their downstream movements can be inhibited by hydropower schemes that entrain fish in their intakes. Here, the riverine migration success of smolts of brown trout Salmo trutta (“trout smolt”) and Atlantic salmon Salmo salar smolts (“salmon smolt”) was ...
Bertram I. C. Warren, J. Robert Britton
wiley +1 more source
Turbidity weakens selection for assortment in body size in groups [PDF]
, 2015 Prey animals commonly associate with similar-looking individuals to reduce predation risk, via a reduction in predator targeting accuracy (the confusion effect) and preferential targeting of distinct individuals (the oddity effect).
Kimbell, Helen S., Morrell, Lesley J.
core +1 more source
Ecological Processes, 2021 Background Habitat heterogeneity clearly distinguished in terms of availability of food and habitat resources and landscape features (natural or human-modified) play a crucial role in the avian species composition and population structure.
Bibhu Prasad Panda +4 more
doaj +1 more source
Impact of estuarine fronts on the dispersal of piscivorous birds in the German Bight [PDF]
Marine Ecology Progress Series, 2001 ABSTRACT: Survey data on seabird distribution at sea, hydrographic data and optical satellite datacollected for the German Bight were used to analyse the variability of the distribution of wintering red-throated diver and black-throated diver Gavia stellata / arctica in relation to oscillations of the JutlandCoastal Current (JCC) and associated surface
H Skov, E Prins
openaire +1 more source
Wildlife Biology, EarlyView.Across their entire Atlantic breeding range, Atlantic puffins Fratercula arctica have experienced decreases in food availability, often leading to population declines. The species is one of the most numerous seabirds in Føroyar (the Faroe Islands, in English) but has faced apparent, unquantified population declines.
Anne N.M.A. Ausems +3 more
wiley +1 more source
River Ouse: fisheries drought report 1996 [PDF]
, 1997 The basis for undertaking this study was to examine factors and potential impacts affecting fish and fishing in relation to low flow drought conditions and what other impacts may arise as a result of further reduced flows resulting from abstraction.
Frear, P.A.
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