Reproduction efficiency and some characteristics of the spawning grounds of the pink salmon Oncorhynchus gorbuscha in the small salmon watercourse in southern Sakhalin

2017 ◽  
Vol 57 (3) ◽  
pp. 393-401
Author(s):  
A. A. Zhivoglyadov
Keyword(s):  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Spawning Grounds ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Southern Sakhalin ◽  
Reproduction Efficiency

scholarly journals Pathways of the Amur pink salmon Oncorhynchus gorbuscha to the areas of reproduction

2016 ◽  
Vol 186 (3) ◽  
pp. 121-134
Author(s):  
Vladimir I. Ostrovsky
Keyword(s):  
Russian Far East ◽  
Pink Salmon ◽  
Far East ◽  
Oncorhynchus Gorbuscha ◽  
Good Survival ◽  
Okhotsk Sea ◽  
Spawning Grounds ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Species Migration ◽  
By Catch

Biannual sequence of high-numerous and low-numerous year-classes of pink salmon ( Oncorhynchus gorbuscha ) is disturbed rarely in the areas close to its spawning grounds where mostly local groupings are landed, as it is shown on the data of fishery statistics in many areas of Russian Far East for 1907-1986. The disturbances are related usually with by-catch of transitory fish, in particular for the Sakhalin-Kuril region. Dynamics of the pink salmon annual landings in the Amur correlates with its dynamics at northwestern Sakhalin, that allows to suppose the species migration from the Okhotsk Sea to its spawning grounds via northwestern Sakhalin. Besides, a part of the Amur pink is caught at the mainland coast of the Gulf of Sakhalin, but the landings in the Amur correlate well with this transitory area in even years only, when the run is stronger. The highest catches of pink salmon on the mainland coast of the Gulf of Sakhalin in 2015 could be ensured neither the Amur nor the Sakhalin groupings; a hypothesis on the Shantar groupings contribution is discussed. In general, high catches of pink salmon in Khabarovsk Region in 2015-2016 are possibly reasoned by its good survival and lowered fishery in the Sakhalin-Kuril region.

Supplementary Checks on the Scales of Pink Salmon (Oncorhynchus gorbuscha) and Chum Salmon (O. keta)

1965 ◽  
Vol 22 (6) ◽  
pp. 1477-1489 ◽  
Author(s):  
H. T. Bilton ◽  
W. E. Ricker
Keyword(s):  
British Columbia ◽  
Chum Salmon ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Commercial Fisheries ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Clear Cut ◽  
Second Year Of Life ◽  
Second Year ◽  
Similar Incidence

Among 159 central British Columbia pink salmon that had been marked by removal of two fins as fry and had been recovered in commercial fisheries after one winter in the sea, the scales of about one-third showed a supplementary or "false" check near the centre of the scale, in addition to the single clear-cut annulus. This evidence from fish of known age confirms the prevailing opinion that such extra checks do not represent annuli, hence that the fish bearing them are in their second year of life rather than their third. Unmarked pink salmon from the same area, and some from southern British Columbia, had a generally similar incidence of supplementary checks. In both marked and unmarked fish the supplementary checks varied in distinctness from faint to quite clear. In a sample of scales of 14 double-fin marked chum salmon which were known to be in their 4th year, all fish had the expected 3 annuli, and 12 fish had a supplementary check inside the first annulus.

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