Results 101 to 110 of about 9,372 (204)

Brain aging phenomena in migrating sockeye salmon Oncorhynchus nerka nerka

open access: yes, 2018
Aging, a process occuring in all vertebrates, is closely related to a loss in physical and functional abilities. There is widespread interest in clarifying the relevance of environmental, metabolic, and genetic factors for vertebrate aging. In the Pacific salmon a dramatic example of aging is known. Looking for changes in the salmon brain, perhaps even
Gotz, M. E.   +8 more
openaire   +1 more source

Возрастной состав чукотской нерки Oncorhynchus nerka

open access: yesИзвестия ТИНРО (Тихоокеанского научно-исследовательского рыбохозяйственного центра), 2014
Long-term data on age composition for Chukchi populations of sockeye salmon are presented. Spawners of 23 ages are recognized in the period 1970-2013 for 10 populations: 2+, 3+, 0.1+, 0.2+, 0.3+, 0.4+, 0.5+, 1.1+, 1.2+, 1.3+, 1.4+, 1.5+, 2.1+, 2.2+, 2.3+, 2.4+, 2.5+, 3.1+, 3.2+, 3.3+, 3.4+, 4.2+, and 4.3+. The brood stock basis is formed by fiveand six-
openaire   +1 more source

Population structure of chum salmon (Oncorhynchus keta) across the Pacific Rim, determined from microsatellite analysis [PDF]

open access: yes, 2009
The Pacific Rim population structure of chum salmon (Oncorhynchus keta) was examined with a survey of microsatellite variation to describe the distribution of genetic variation and to evaluate whether chum salmon may have originated from two or more ...
Beacham, Terry D.   +3 more
core  

Satellite-Based Time Series of Chlorophyll in Chilko Lake, British Columbia, Canada

open access: yesCanadian Journal of Remote Sensing, 2019
In Canada, many northern lakes are remote and difficult to access, with limited limnological data. Satellite sensors provide widespread coverage and growing time series of data unavailable via conventional sampling, but global validation is still limited.
Leslie N. Brown   +6 more
doaj   +1 more source

Effects of an Inert, Palatable Resource Subsidy on Live Prey Selection by Juvenile Fish [PDF]

open access: yes, 2012
Resource subsidies, defined as energy and nutrients that enter ecosystems from external sources, can have diverse and complex effects on consumer populations.
Yang, Xiaoxue
core  

Effect of Edwardsiella ictaluri Infection on Plasma Corticosterone Levels in Channel Catfish (Ictalurus punctatus) [PDF]

open access: yes, 1984
Channel catfish (Ictalurus punctatus) were innoculated with a new host specific bacterium, Edwardsiella ictaluri, to observe the influence of bacterial infection on plasma corticosterone levels at various temperatures.
Beadles, John K.   +2 more
core   +2 more sources

Transcriptional Response to Acute Thermal Exposure in Juvenile Chinook Salmon Determined by RNAseq. [PDF]

open access: yes, 2015
Thermal exposure is a serious and growing challenge facing fish species worldwide. Chinook salmon (Oncorhynchus tshawytscha) living in the southern portion of their native range are particularly likely to encounter warmer water due to a confluence of ...
Baerwald, Melinda R   +6 more
core  

Shifting Patterns of Nitrogen Excretion and Amino Acid Catabolism Capacity during the Life Cycle of the Sea Lamprey (\u3cem\u3ePetromyzon mariunus\u3c/em\u3e) [PDF]

open access: yes, 2006
The jawless fish, the sea lamprey (Petromyzon marinus), spends part of its life as a burrow-dwelling, suspension-feeding larva (ammocoete) before undergoing a metamorphosis into a free swimming, parasitic juvenile that feeds on the blood of fishes.
Claude, Jaime F.   +6 more
core   +1 more source

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