Results 11 to 20 of about 6,195 (168)

Dependence of number of chum salmon Oncorhynchus keta progeny in Okhotsky district on number of their parents and environments of reproduction

open access: yesИзвестия ТИНРО, 2020
Dependence of chum salmon Oncorhynchus keta recruitment (number of mature adults) in Okhotsky district located on the Okhotsk Sea coast on a number of spawners is analyzed for the spawning years of 1983–2014.
V. I. Ostrovsky, A. S. Ponomarev
doaj   +3 more sources

Factors controlling the year-classes strength for chum salmon Oncorhynchus keta in the Okhotsk district

open access: yesИзвестия ТИНРО, 2023
A quasi-cyclicity associated with variability of environmental conditions is detected for the regression residuals of the stock-recruitment model for chum salmon Oncorhynchus keta in the Okhotsk district, described by Ricker’s equation.
V. I. Ostrovsky
doaj   +1 more source

Detecting spawning of threatened chum salmon Oncorhynchus keta over a large spatial extent using eDNA sampling: Opportunities and considerations for monitoring recovery

open access: yesEnvironmental DNA, 2021
Over the last century, anthropogenic activities have caused substantial declines in the abundance of chum salmon (Oncorhynchus keta) throughout their range in western North America.
Kristen M. Homel   +5 more
doaj   +1 more source

Shifting phenology of an endangered apex predator mirrors changes in its favored prey

open access: yesEndangered Species Research, 2022
The timing, or phenology, of predator activity in relation to their prey is critical for survival and fitness, yet rarely quantified for marine species, even those of conservation concern.
AK Ettinger   +6 more
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

On fecundity of chum salmon Oncorhynchus keta in the commercial herd at Iturup Island

open access: yesИзвестия ТИНРО, 2023
Absolute fecundity of chum salmon Oncorhynchus keta is investigated for the commercial herd dwelled at Iturup Island. Currently, the herd is formed mostly by fish of hatchery origin but has retained the same species and regional features that ...
A. N. Elnikov, O. V. Zelennikov
doaj   +1 more source

Environmental DNA revealed the fish community of Hokkaido Island, Japan, after invasion by rainbow trout [PDF]

open access: yesBiodiversity Data Journal, 2020
In freshwater ecosystems, invasive salmonid fishes can have a significant impact on native fish species. Detecting the invasion and its negative effects is critical for the conservation of native fish communities.
Akio Imamura   +3 more
doaj   +3 more sources

NMR — SPECTROSCOPY TECHNIQUE FOR SALMON FISH SPECIES QUALITY ASSESSMENT

open access: yesПищевые системы, 2019
NMR-spectroscopy was used for development of the criteria which characterize the chilled and frozen fish quality. It has been shown that 1H-NMR experiments can be used as quality factor to measure the concentration of inosine, hypoxanthine and inosine-5’-
L. S. Abramova   +2 more
doaj   +1 more source

Growth and maturation of Korean chum salmon under changing environmental conditions [PDF]

open access: yes, 2012
Salmon populations in the North Pacific have been subject to major changes in environment and fishing pressure since the early 1980s, including a climate regime shift in 1988-89, the closure of the high-seas fisheries in 1993, and a subsequent climatic ...
Dieckmann, U.   +6 more
core   +1 more source

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