Results 51 to 60 of about 28,215 (245)
Fish and Fisheries, EarlyView.ABSTRACT Fish migration through river networks is essential for completing life cycles and accessing critical habitats, but fragmentation increasingly disrupts spawning movements. In Europe, over one million barriers limit connectivity and create trade‐offs between ecological integrity and human uses, such as hydropower, flood control, fisheries and ...
Christian Schlautmann +5 more
wiley +1 more source
Knowledge and Management of Aquatic Ecosystems, 1991 On a analysé morphologiquement deux souches de truite arc-en-ciel (Oncorhynchus mykiss), génétiquement différentes. Pour les deux souches, il existe une forte corrélation entre la symétrie des rayons de la nageoire pectorale et le rapport poids/longueur.
PIÑEIRO C. +3 more
doaj +1 more source
Fisheries Management and Ecology, EarlyView.ABSTRACT Stocking fish is a common practice in fisheries management, particularly for species of high conservation value or economic importance. Despite its widespread use, systematic evaluation of fish stockings remains scarce. This includes non‐native species such as rainbow trout (Oncorhynchus mykiss), which are intensively stocked into European ...
Christoffer Nagel +4 more
wiley +1 more source
Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2008 We studied effects of different feeding deprivation periods on the growth and feed utilization indices of rainbow trout. The study lasted for eight weeks.
A. Imani; M. Farhangi; R. Yazdanparast; M. Bakhtiyari; Z. Shokoh saljoghi; B. Majazi amiri
doaj
Aquaculture Reports, 2020 A 10-week feeding trial was undertaken to determine the optimum dietary protein requirement of fingerling rainbow trout, Oncorhynchus mykiss. Six casein-gelatin based isocaloric (20.90 kJ 100 g−1, gross energy) diets containing graded levels of dietary ...
Imtiaz Ahmed, Ishtiyaq Ahmad
doaj +1 more source
Effects of the Invasive Round Goby on Swedish Recreational Fishing Values
Fisheries Management and Ecology, EarlyView.ABSTRACT The round goby, an invasive fish from the Black and Caspian Seas, has spread to Swedish waters, threatening recreational fisheries. We modeled impacts on the future recreational fishery in Sweden using data from a recreational fishing survey, and estimated effects of the round goby on other fish species. Values attached to recreational fishing
Göran Bostedt +3 more
wiley +1 more source
Majallah-i ̒Ilmī-i Shīlāt-i Īrān, 2011 This research was carried out to determine LC50 for Zataria multiflora essential oil in rainbow trout (Oncorhynchus mykiss) fries at 96 hours. In the process, we used the static O.E.C.D method for 180 rainbow trout fries weighing 5±1 grams in five ...
M. Sharif Rohani email ; M. Haghighi; H. Assaeian
doaj
Using Eye Lens Stable Isotopes to Identify the Rearing Origin of Fall Age‐0 Walleye (Sander vitreus)
Fisheries Management and Ecology, EarlyView.ABSTRACT Isotope values in fish eye lenses may be useful in differentiating rearing origins. We compared eye lens isotopic values of fall fingerling age‐0 walleye (Sander vitreus) reared in a hatchery pond, a recirculating aquaculture system (RAS), and a natural lake. Using 10 fish per rearing source, we delaminated layers from one eye lens per fish to
Justin M. Sturtz +5 more
wiley +1 more source
Revista de Biología Tropical, 1999 Se estudió por ultraestructura la sangre periférica de 5 adultos de una población introducida de trucha arco iris (Oncorhynchus mykiis) cultivados en el Centro de Piscicultura Experimental del Neusa, (73° 38' 28"w; 5° 8'30"N), para describir la ...
Adriana Rodríguez Forero
doaj
Fisheries Management and Ecology, EarlyView.ABSTRACT The global decline in salmonid stocks has increased the need for knowledge of local adaptations and life history strategies of salmonids. In this study, we used radio‐telemetry tracking data from sea trout populations in two large high‐latitude rivers to model upstream spawning migration speed of trout in response to prevailing environmental ...
L. Lähteenmäki +8 more
wiley +1 more source