Results 51 to 60 of about 141,246 (258)

A Tool for Prioritizing Gravel Augmentation Reaches for Sediment Starved Rivers

River Research and Applications, EarlyView.
ABSTRACT Gravel augmentation is a widely used restoration technique used to improve habitat below dams, including salmonids spawning habitat. However, gravel augmentation can be cost‐prohibitive, and it is often unclear which stream segments have the highest potential to benefit spawning salmonids.
Patricia J. Wohner, Peter A. Samarin, James T. Peterson   +2 more
wiley   +1 more source

BIOMASS AND DENSITY OF BROWN AND RAINBOW TROUT IN NEW MEXICO STREAMS [PDF]

Croatian Journal of Fisheries, 1995
Mean stream numerical density of the brown trout (Salmo trutta m. fario Linnaeus, 1758) and the rainbow trout (Onchorhynchus mykiss Walbaum, 1792) was 0.090 fish/m2 of which brown trout averaged 69% (72% in total biomass) in 15 high-elevation New Mexico ...
Srečko Lainer
doaj  

The Influence of Fisheries Management on the Brown Trout Population in Moravice River

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2016
In 2013, an ichthyological investigation with focus on the population of brown trout (Salmo trutta m. fario) in Moravice River above Slezská Harta dam reservoir in 6 localities of two salmonid fisheries was conducted (3 locations in fishery Moravice 7 ...
Petr Chalupa, Eva Poštulková, Lenka Hadašová, Petr Spurný   +3 more
doaj   +1 more source

Assessing the Predatory Effects of Invasive Brown Trout on Native Rio Grande Sucker and Rio Grande Chub in Mountain Streams of New Mexico, USA

Conservation, 2022
Invasive predators pose a critical threat to native taxa. Body size plays an important role in mediating the interactions of predator and prey. For piscivorous fishes, increased predator body size can be accompanied by the selection of increasingly ...
Jansen Ivie, Owen George, Scott F. Collins   +2 more
doaj   +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  

Hunting and fishing harvest data collection: a horizon scanning exercise from the French context

Wildlife Biology, EarlyView.
Legal and societal moves increasingly lead leisure hunting and fishing practitioners to record their harvest. The total number of individuals harvested per population per year is the minimum required information to feed into demographic models and allow science‐based management. Some few schemes record more detailed data, hence allowing better‐informed
Matthieu Guillemain, Léo Bacon, Aurélie Barboiron, Pierre Defos du Rau, Cyril Eraud, Aurélie Flesselle, Charlotte Francesiaz, Quentin Josset, Yoann Lechauve, Kevin Le Rest, Hervé Lormée, Maxime Passerault, Maryline Pellerin, Caroline Penil, Betty Plaquin, Adrien Tableau, Julien Terraube, Laurent Beaulaton   +17 more
wiley   +1 more source

A MEASUREMENT AND COMPARISON OF DIGESTIVE ENZYMES ACTIVITY IN LARVAE OF CASPIAN BROWN TROUT AND RAINBOW TROUT AT INITIATION OF EXOGENOUS FEEDING

‬‭Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2008
To determine the digestive capacity of larvae in Caspian brown trout and Rainbow trout, activity of digestive enzymes including pepsin, trypsin, chymotrypsin, a-amylase, lipase and alkaline phosphatase in 2/3 and complete yolk-sac absorption stages were
A. Zamani; A. Hajimoradlo; R. Madani; M. Farhangi; A. Vilaki
doaj  

SNP analyses and acoustic tagging reveal multiple origins and widespread dispersal of invasive brown trout in the Falkland Islands

Evolutionary Applications, 2021
Biological invasions are important causes of biodiversity loss, particularly in remote islands. Brown trout (Salmo trutta) have been widely introduced throughout the Southern Hemisphere, impacting endangered native fauna, particularly galaxiid fishes ...
Jessica F. Minett, Carlos Garcia de Leaniz, Halina Sobolewska, Paul Brickle, Glenn T. Crossin, Sofia Consuegra   +5 more
doaj   +1 more source

Effects of temperature and browning on the functional response of a freshwater top predator

Journal of Animal Ecology, EarlyView.
This study explores for the first time how temperature and browning affect the functional response of a freshwater piscivore, the northern pike. The authors find surprisingly weak effects of browning, challenging visual foraging theory. Pike displayed a rare dome‐shaped functional response in cold clear water, potentially driven by seasonal changes in ...
Viktor Nilsson‐Örtman, Erik Nilsson, Christer Brönmark   +2 more
wiley   +1 more source

Alternative Life-History in Native Trout (Salmo spp.) Suppresses the Invasive Effect of Alien Trout Strains Introduced Into Streams in the Western Part of the Balkans

Frontiers in Ecology and Evolution, 2020
The diversity of native trout fish Salmo spp. comprises a variety of nominal taxa in Serbia, Montenegro, and Bosnia and Herzegovina. Recent mapping of the resident trout populations detected the presence of brown trout Salmo trutta (sensu stricto) of the
Dubravka Škraba Jurlina, Ana Marić, Danilo Mrdak, Tamara Kanjuh, Ivan Špelić, Vera Nikolić, Marina Piria, Predrag Simonović, Predrag Simonović   +8 more
doaj   +1 more source