Shifting phenology of an endangered apex predator mirrors changes in its favored prey
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 fecundity of chum salmon Oncorhynchus keta in the commercial herd at Iturup Island
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
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Environmental DNA revealed the fish community of Hokkaido Island, Japan, after invasion by rainbow trout [PDF]
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
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
The Expression of Leptin, Estrogen Receptors, and Vitellogenin mRNAs in Migrating Female Chum Salmon, : The Effects of Hypo-osmotic Environmental Changes [PDF]
Leptin plays an important role in energy homeostasis and reproductive function in fish, especially in reproduction. Migrating fish, such as salmonoids, are affected by external environmental factors, and salinity changes are a particularly important ...
Young Jae Choi +3 more
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Hexachlorocyclohexane and DDT in marine organisms from the Bering and the Okhotsk Seas
Organochlorine pesticides (HCHs and DDT) are harmful and toxic substances affected biota. HCHs and DDT are still used as pesticides in the Southern Hemisphere and from there can reach the North Pacific due to atmospheric transfer.
Vasily Yu. Tsygankov +3 more
doaj +1 more source
Comparative Analysis of the Blood Plasma Metabolome of Negligible, Gradual and Rapidly Ageing Fishes
There are a number of different animals that belong to long- and short-lived species and show a various rate of ageing, providing an ideal model to investigate mechanisms of longevity. In this work, a metabolome profiling of blood plasma from fishes with
Oxana P. Trifonova +9 more
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For almost the century the landings of summer chum salmon in the Amur were approximately in 5 times lower that the landings of fall chum salmon, in spite on almost the same fishing efforts.
Vladimir I. Ostrovsky +2 more
doaj +1 more source
Characteristics of spawners of chum salmon Oncorhynchus keta from commercial stock of Iturup Island
Chum salmon spawners returned for spawning in the rivers of Prostor and Kurilsky Bays on Iturup Island (Kuril Islands, Sakhalin Region) were examined in the period from September 19 to November 4, 2022. Both females and males had mostly the age 3+ (68.8 %
A. N. Elnikov, O. V. Zelennikov
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Application of laser ablation ICPMS to trace the environmental history of chum salmon Oncorhynchus keta. [PDF]
Trace element levels in otoliths of chum salmon Oncorhynchus keta were examined by means of laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS).
Hirata, Takafumi +2 more
core +1 more source

