Results 311 to 320 of about 1,204,520 (354)

Brook Trout, Brown Trout, and Ectoparasitic Copepods Salmincola edwardsii: Species Interactions as a Proximate Cause of Brook Trout Loss Under Changing Environmental Conditions

, 2016
Changes in environmental conditions are expected to affect stream temperature and ultimately the presence of native Brook Trout Salvelinus fontinalis in Wisconsin streams.
M. Mitro
semanticscholar   +1 more source

Infection of brown trout with Diphyllobothrium dendriticum procercoids

International Journal for Parasitology, 1997
The aims of this experimental study were to develop a practical method of controlling the number of Diphyllobothrium dendriticum procercoids delivered to a fish host; to examine the effect of different procercoid doses (3, 7 and 15) on the plerocercoid level in fish; and to examine the potential mortality caused by plerocercoids.
Rahkonen, Riitta, Valtonen, E. Tellervo
openaire   +3 more sources

Selection for growth and feeding hierarchy in brown trout

Applied Animal Behaviour Science, 2006
A line of brown trout as been selected for longer body length up to five generations and a control line has been maintained. In order to ascertain whether this selection had caused correlated responses in feeding behaviour, we measured the group feeding hierarchy and the regularity of intake at the individual level with the X-radiographic technique on ...
Boujard, Thierry, Cuvier, A., Geurden, Inge, Labbé, Laurent, Mambrini, Muriel   +4 more
openaire   +3 more sources

Migration speed, routes, and mortality rates of anadromous brown trout Salmo trutta during outward migration through a complex coastal habitat

, 2015
Little is known about migratory routes and habitat use of anadromous brown trout Salmo trutta at sea. We therefore conducted a 2 yr study (2011−2012) on sea trout in the River Himleån system (a river, an estuary, and a coastal sea environment) in western
D. Aldvén, R. Hedger, F. Økland, P. Rivinoja, J. Höjesjö   +4 more
semanticscholar   +1 more source

Predation on native sculpin by exotic brown trout exceeds that by native cutthroat trout within a mountain watershed (Logan, UT, USA)

, 2015
We explored potential negative effects of exotic brown trout (Salmo trutta) on native sculpin (Cottus sp.) on the Logan River, Utah, USA by (i) examining factors most strongly correlated with sculpin abundance (e.g., abiotic conditions or piscivory ...
C. Meredith, P. Budy, P. Budy, G. Thiede
semanticscholar   +1 more source

ON THE MOVEMENTS OF THE BROWN TROUT OF LLYN TEGID

Proceedings of the Zoological Society of London, 1962
Mass‐movements of the trout of Llyn Tegid have been inferred from scale structure and catch records for the lake and tributary streams. About 60 per cent of the trout enter the lake from tributary (nursery) streams when two‐years‐old, 20 per cent when one‐year‐old and 20 per cent when three‐years‐old.
J. W. Jones, J. N. Ball
openaire   +2 more sources

A FUNCTIONAL MODEL OF RADIOCESIUM TURNOVER IN BROWN TROUT

Ecological Applications, 1997
We describe a mechanistic model to explore the environmental and metabolic determinants of radiocesium kinetics in a freshwater fish, the brown trout (Salmo trutta). Our model, which incorporates submodels for fish growth, food consumption, ambient temperature, and radiocesium turnover, was validated and calibrated to observations in three year-classes
Torbjørn Forseth, Ola Ugedal, Bror Jonsson   +2 more
openaire   +2 more sources

The Bionomics of Brown Trout in a Dartmoor Stream

The Journal of Animal Ecology, 1961
A brown trout population in an acid stream was investigated in terms of numbers, growth, reproduction and feeding; in addition the dynamics of the prey species was quantitatively examined. The stream studied, the Walla Brook, had a fluctuating pH of 5-9-6-8. It was subject to occasional severe flooding.
openaire   +2 more sources

Cerebellar Regulation of Sensorimotor Activity in Brown Trout

Brain, Behavior and Evolution, 2002
Evoked field potentials were recorded from the mesencephalic (‘optic’) tectum, cerebellar corpus, midline rhombencephalon, and spinal cord of decerebrated brown trout in response to single electrical shocks given to an optic nerve. Evoked responses were also recorded from the rhombencephalon and spinal cord following stimulation (singly and with trains)
Barry L. Roberts, D H Paul, J A Dean
openaire   +2 more sources

The spawning behaviour of brown trout and salmon

The British Journal of Animal Behaviour, 1954
Summary o 1. By using specially constructed tanks it has been possible to observe in detail and take cine films of thirteen spawnings of brown trout, and over eighty spawnings of the salmon. Despite the artificial conditions in which these fish spawned we believe that their spawning behaviour, as observed, was normal. 2.
J.W. Jones, J.N. Ball
openaire   +2 more sources