Results 61 to 70 of about 296,896 (278)

Bioclimatic, demographic and anthropogenic correlates of grizzly bear activity patterns in the Greater Yellowstone Ecosystem

Oikos, EarlyView.
Plasticity of diel activity rhythms may be a key element for adaptations of wildlife populations to changing environmental conditions. In the last decades, grizzly bears Ursus arctos in the Greater Yellowstone Ecosystem (GYE) have experienced notable environmental fluctuations, including changes in availability of food sources and severe droughts ...
Aurora Donatelli, Mark A. Haroldson, Justin G. Clapp, Paolo Ciucci, Frank T. van Manen   +4 more
wiley   +1 more source

Survival, growth, and yield of brown trout stocked as fingerlings in Hot Creek, California [PDF]

, 1998
Four groups of fin clipped brown trout (Salmo trutta) fingerlings were planted in Hot Creek over a six year period. Survival and growth were estimated by fall and/or spring mark-and-recapture surveys.
Deinstadt, John M.
core  

Temporal changes in the dietary niche of sympatric seals provides insight into the role of competition in population declines

Oikos, EarlyView.
Competition theory suggests that interspecific prey competition can result in changes to the dietary niche, but obtaining timeseries of data from sympatric species experiencing temporal variation in competition is challenging. Scotland is an important area for two species of seals, but over the past 20 years, populations of harbour seals Phoca vitulina
Izzy Langley, Philip S. Hammond, Paul M. Thompson, Graham J. Pierce, Lindsay J. Wilson, Ailsa J. Hall, Gordon D. Hastie, Debbie J. F. Russell   +7 more
wiley   +1 more source

The effect of probiotic‑enriched feed on aquaculture‑biological parameters of rainbow trout Oncorhynchus mykiss (Walbaum, 1792) during early ontogeny

Siberian Journal of Life Sciences and Agriculture
Background.  The issues of increasing productivity in various sectors of agriculture, especially the aquaculture sector, are currently a priority for many research teams in Russia and other countries.
Dmitry V. Rudoy, Anastasia V. Olshevskaya, Viktoria N. Shevchenko, Tatyana A. Maltseva, Denis A. Kozyrev, Maria S. Mazanko   +5 more
doaj   +1 more source

Creation of fish databases for electronic interactive map: tables and keys

Ribogospodarsʹka Nauka Ukraïni, 2019
Purpose. Purpose of the work is to create fish databases using rainbow trout data and basing on new methods of theoretical analysis of fish data and their ordering in hierarchical structures with elements represented as relation tables linked through a ...
O. Klyuchko, L. Buchatsky, Yu. Rud, O. Melezhyk   +3 more
doaj   +1 more source

Broad support for lethal control of wild deer among subscribers of nature organisations in England and Wales

People and Nature, EarlyView.
Abstract Wild deer populations are increasing across the northern hemisphere, posing challenges to the environment and people. Deer impacts can be managed using lethal and non‐lethal practices, but research suggests lethal control receives mixed support.
Elena Cini, Rebecca Spake, Louise McMillan, Amy Gresham, Graeme Shannon, Felix Eigenbrod, Christopher P. Nichols, Paul Orsi, Alastair I. Ward, Freya A. V. St John   +9 more
wiley   +1 more source

Etude préliminaire sur l'utilisation de l'Aqui'S® comme anesthésique pour la manipulation et l'échantillonnage de truites arc-en-ciel (Oncorhynchus mykiss) et de truites fario (Salmo trutta)

Knowledge and Management of Aquatic Ecosystems, 1998
La cinétique d'anesthésie de truites arc-en-ciel (Oncorhynchus mykiss) avec de l'Aqui'S® a été suivie sur des animaux de différents poids (9, 25 et 200 g). La vitesse d'anesthésie augmente avec la dose d'Aqui'S® utilisée.
AUPERIN B., GOARDON L., QUEMENEUR A., THOMAS J. L., AUBIN J., VALOTAIRE C., ROUGER Y., MAISSE G.   +7 more
doaj   +1 more source

Genome-Wide Association Analysis With a 50K Transcribed Gene SNP-Chip Identifies QTL Affecting Muscle Yield in Rainbow Trout

Frontiers in Genetics, 2018
Detection of coding/functional SNPs that change the biological function of a gene may lead to identification of putative causative alleles within QTL regions and discovery of genetic markers with large effects on phenotypes.
Mohamed Salem, Mohamed Salem, Rafet Al-Tobasei, Rafet Al-Tobasei, Ali Ali, Daniela Lourenco, Guangtu Gao, Yniv Palti, Brett Kenney, Timothy D. Leeds   +9 more
doaj   +1 more source

Steps of the Replication Cycle of the Viral Haemorrhagic Septicaemia Virus (VHSV) Affecting Its Virulence on Fish

Animals, 2020
The viral haemorrhagic septicaemia virus (VHSV), a single-stranded negative-sense RNA novirhabdovirus affecting a wide range of marine and freshwater fish species, is a main concern for European rainbow trout (Oncorhynchus mykiss) fish farmers.
Carmen López-Vázquez, Isabel Bandín, Valentina Panzarin, Anna Toffan, Argelia Cuenca, Niels J. Olesen, Carlos P. Dopazo   +6 more
doaj   +1 more source

Feeding selectivity of brown trout (Salmo trutta) in Loch Ness, Scotland [PDF]

, 2000
The aim of this study was to compare statistically the zooplankton assemblage ingested by brown trout (Salmo trutta) in Loch Ness with that of the zooplankton in the water column.
Grey, Jonathan, Jones, Roger, Thackeray, Stephen   +2 more
core