Results 41 to 50 of about 20,326 (217)

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

Local environment and sampling bias drive parasite prevalence estimates in freshwater fish communities

Oikos, EarlyView.
Parasite occurrence and infection estimates vary through time and space, making understanding the underlying drivers highly complex. Comparative studies based on empirical data must consider the factors of variation involved in estimating infection metrics in natural populations to make appropriate and reliable comparisons. Using a multi‐scale approach,
Juliane Vigneault, Sandra Ann Binning, Éric Harvey   +2 more
wiley   +1 more source

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

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

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  

Does Method of Field Preparation Affect Survival and Growth of Juvenile Chinook Salmon in Agricultural Floodplains?

River Research and Applications, EarlyView.
ABSTRACT There is growing interest to integrate conservation initiatives into agricultural practices using a reconciliation ecology framework. In California's Central Valley, one approach to improving crucial nursery habitat for threatened and endangered fish species is by re‐creating floodplain habitats through the inundation of agricultural fields ...
Rachelle L. Tallman, Alexandra N. Wampler, Gabriel P. Singer, Carson A. Jeffres, Dennis E. Cocherell, Jordan Colby, Nann A. Fangue, Robert A. Lusardi, Andrew L. Rypel   +8 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

Emigration and Survival of Hatchery‐Reared Coho Salmon Released as Parr and Smolts in a Reintroduction Program

River Research and Applications, EarlyView.
ABSTRACT Releasing fish at varied life stages is an underutilized hatchery‐rearing practice. Columbia River Treaty tribes have been working to reintroduce extirpated Coho Salmon to historical habitats in upper watersheds. This effort has included the release of hatchery‐origin fish at both the parr and smolt life stages in the Yakima River Basin ...
William J. Bosch, Shubha N. Pandit, Todd Newsome, Andrew P. Matala, Chris Frederiksen, Zack Mays, David Lind, Mark V. Johnston, Joe Blodgett   +8 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  

Flow Matters: Unravelling the Interactive Influences of Flow Variation and Non‐Native Trout on Vulnerable Galaxiids

River Research and Applications, EarlyView.
ABSTRACT Understanding the interactive effects of non‐native species and alterations to flow regimes is important to combat threats to freshwater communities. Low‐flow conditions may either exacerbate or offset influences of non‐natives but the mechanisms determining the direction are poorly understood.
Olivia R. Hore, Jonathan D. Tonkin, Nixie C. Boddy, Angus R. McIntosh   +3 more
wiley   +1 more source