Results 1 to 10 of about 9,274 (143)

DNA and scale reading to identify repeat spawning in Atlantic salmon: Unique insights into patterns of iteroparity [PDF]

open access: yesEvolutionary Applications, 2023
Iteroparity represents an important but often overlooked component of life history in anadromous Atlantic salmon. Here, we combined individual DNA profiling and scale reading to identify repeat spawners among ~8000 adult salmon captured in a fish trap in
Håvard Kaland   +8 more
doaj   +2 more sources

Considering sampling bias in close‐kin mark–recapture abundance estimates of Atlantic salmon [PDF]

open access: yesEcology and Evolution, 2021
Genetic methods for the estimation of population size can be powerful alternatives to conventional methods. Close‐kin mark–recapture (CKMR) is based on the principles of conventional mark–recapture, but instead of being physically marked, individuals are
Sebastian Wacker   +6 more
doaj   +2 more sources

Antioxidants, lysosomes and elements status during the life cycle of sea trout Salmo trutta m. trutta L. [PDF]

open access: yesScientific Reports, 2021
The aim of our study was to elucidate the effects of both development stages (parr, smolt, adult, spawner), and kelt as a survival form and sex (male, female) on the functional stability of the lysosomal complex, biomarkers of oxidative stress, and ...
Natalia Kurhaluk, Halyna Tkachenko
doaj   +2 more sources

Reproduction of saguiru Steindachnerina elegans (Steindachner, 1874) (Pisces: Curimatidae) in the São Francisco River, downstream from a large reservoir in south-eastern Brazil [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2021
The gametogenesis and reproduction of S. elegans from the São Francisco River at Três Marias, Minas Gerais, were analyzed in this study. Steindachrina elegans is a species abundant in the São Francisco River basin and an important fish in the food chain.
LÍVIO GIORGIO L. DE CAMPOS FILHO   +5 more
doaj   +1 more source

Spawner weight and ocean temperature drive Allee effect dynamics in Atlantic cod, Gadus morhua: inherent and emergent density regulation [PDF]

open access: yesBiogeosciences, 2023
Stocks of Atlantic cod, Gadus morhua, show diverse recovery responses when fishing pressure is relieved. The expected outcome of reduced fishing pressure is that the population regains its size.
A.-M. Winter   +3 more
doaj   +1 more source

Reproduction and commercial cultivation of chinese perch Siniperca chuatsi in conditions of a warm-water farm

open access: yesИзвестия ТИНРО, 2023
A breeding stock of chinese perch was gotten in a warm-water farm located in the southern Far East of Russia, where the experiment is conducted on growing this species up to three years. Combined method of growing in tanks, warm-water fry ponds and cages
E. I. Rachek
doaj   +1 more source

Sockeye salmon of Iturup Island: characteristics of spawners from commercial catches in 2021

open access: yesИзвестия ТИНРО, 2022
Spawners of sockeye salmon caught in northern Iturup and in the Prostor Bay and Kurilsky Bay in July-August, 2021 are investigated. Almost all of them had the age 1.2+ or 1.3+, with prominent prevalence of the former both for females (88.9 %) and males ...
A. N. Elnikov, O. V. Zelennikov
doaj   +1 more source

On state of commercial herd of chum salmon Oncorhynchus keta and forecasting its abundance at Iturup Island

open access: yesИзвестия ТИНРО, 2023
Population dynamics and size-age structure are analyzed for the chum salmon herd formed in the Prostor and Kurilsky Bays of Iturup Island (Kuril Islands). Release of chum juveniles into the waters of the bays increased from 10.7.106 ind. in 1996 to 197.6.
A. N. Elnikov, O. V. Zelennikov
doaj   +1 more source

Large river habitat complexity and productivity of Puget Sound Chinook salmon. [PDF]

open access: yesPLoS ONE, 2018
While numerous studies have shown that floodplain habitat complexity can be important to fish ecology, few quantify how watershed-scale complexity influences productivity.
Jason E Hall   +6 more
doaj   +1 more source

Reproductive Characteristics of the Pond-Farmed Sultan Fish (Leptobarbus hoevenii)

open access: yesJurnal Ilmiah Perikanan dan Kelautan, 2021
Highlight Research • The reproductive characteristics of L. hoevenii were examined • The potentially smallest maturity sizes of female and male L. hoevenii were 350 g and 180 g, respectively • The fecundity of a 1,000 g L.
Sajeenuth Srithongthum   +7 more
doaj   +1 more source

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