Random Movement and Orientation in Pink Salmon (Oncothynchus gorbuscha) Migrations

1989 ◽  
Vol 46 (6) ◽  
pp. 1062-1066 ◽  
Author(s):  
Kazuhiko Hiramatsu ◽  
Yukimasa Ishida
Keyword(s):  
North American ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Random Movement ◽  
The North ◽  
Oriented Movement ◽  
The Mean ◽  
Using Data ◽  
Model Fish

The homing migration of pink salmon (Oncorhynchus gorbuscha) from the open ocean towards their natal rivers was studied by a mathematical model using data from tagging experiments. In this model fish migration was considered to be the resultant of fish orientation and random movement. The mean migration speed and dispersion coefficient (an index of random movement) evaluated from regression analysis were 19.6 km∙d−1 and 739 km2∙d−1 for the North American group and 47.1 km∙d−1 and 863 km2∙d−1 for the East Kamchatkan group, respectively. The results indicated that pink salmon migration has more oriented movement than had been suggested by a previous computer simulation by other workers. The results also indicated that there is a distinct difference in the migratory behavior of North American and East Kamchatkan pink salmon.

Coastal Movements of Mature Fraser River Pink Salmon (Oncorhynchus gorbuscha) as Revealed by Ultrasonic Tracking

1973 ◽  
Vol 30 (9) ◽  
pp. 1309-1316 ◽  
Author(s):  
A. B. Stasko ◽  
R. M. Horrall ◽  
A. D. Hasler ◽  
D. Stasko
Keyword(s):  
Pink Salmon ◽  
Tidal Currents ◽  
Oncorhynchus Gorbuscha ◽  
Fraser River ◽  
Release Point ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Ground Speed ◽  
The North ◽  
Active Fish ◽  
Ultrasonic Tracking

Eleven mature pink salmon (Oncorhynchus gorbuscha) were tracked in September 1967 for periods of 3–50 hr over distances from 2 to 127 km to determine migration patterns.The fish were classified as "active" or "passive." Active fish moved faster and their paths were straighter. Active tracks ended distant from and to the north (toward the Fraser River) of the release point; passive tracks ended near or south of the release point. Active fish did not follow shorelines, but travelled primarily along the axes of tidal currents. They moved both with the northward flood and against the southward ebb currents, during day and at night. Average ground speed of active fish was 62 cm/sec (2.2 km/hr).

scholarly journals Measuring the net biological impact of fisheries enhancement: pink salmon hatcheries can increase yield, but with apparent costs to wild populations

2017 ◽  
Vol 74 (8) ◽  
pp. 1233-1242 ◽  
Author(s):  
Ricardo O. Amoroso ◽  
Michael D. Tillotson ◽  
Ray Hilborn
Keyword(s):  
Large Scale ◽  
Juvenile Fish ◽  
Pink Salmon ◽  
Major Change ◽  
Maximum Sustainable Yield ◽  
Oncorhynchus Gorbuscha ◽  
Precautionary Approach ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
The North ◽  
Hatchery Program

Hatchery production of juvenile fish for release into the wild has been practiced for well over a century in an effort to increase the number of salmon available to harvest. In this study, we evaluate the net impact of the largest such program in North America, the hatchery program for pink salmon (Oncorhynchus gorbuscha) in Prince William Sound (PWS), Alaska. At the same time the hatchery program was increasing in output, there was a major change in productivity in the North Pacific so that throughout Alaska pink salmon increased dramatically in abundance between the 1970s and the 2000s. Using other regions of Alaska as reference sites, we estimate that the PWS hatchery program has increased the total catch by an average of 17 million fish, of which 8 million have been allocated to pay hatchery operating expenses. We estimate that the maximum sustainable yield (MSY) of wild spawning fish in PWS has increased slightly (28%), while in regions of Alaska without pink salmon hatchery programs the MSY has tripled. Our results support the use of a precautionary approach to future large-scale stock enhancement efforts.

Electrophoretic Characterization of Odd-Year Pink Salmon (Oncorhynchus gorbuscha) Populations from the Pacific Coast of Russia, and Comparison with Selected North American Populations

1994 ◽  
Vol 51 (S1) ◽  
pp. 158-171 ◽  
Author(s):  
James B. Shaklee ◽  
Natalya V. Varnavskaya
Keyword(s):  
North America ◽  
North American ◽  
Pacific Coast ◽  
Minimum Spanning Tree ◽  
Allelic Variation ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Significant Heterogeneity ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
The Pacific

We collected and electrophoretically analyzed a total of 558 fish from eight locations along the Pacific Coast of Russia. We successfully screened 44 enzyme-coding loci: 14 loci were polymorphic at the 0.95 level in at least one collection, an additional eight were polymorphic at the 0.99 level but not at the 0.95 level, and the remaining 22 were either monomorphic or exhibited only very rare variation in these collections. Contingency χ2 tests using the 23 most variable loci revealed significant heterogeneity among all eight collections (p = 0.028) but little or no significant heterogeneity among collections within areas (northeastern Kamchatka peninsula, p = 0.180; southwestern Kamchatka, p = 0.533; and mainland adjacent to the northwestern Sea of Okhotsk, p = 0.071). Multidimensional scaling and minimum spanning tree analyses using genetic distances among collections indicated that geographic proximity of spawning sites was not associated with genetic similarity. The eight odd-year pink salmon (Oncorhynchus gorbuscha) collections from Russia were compared with 16 collections from North America (southeastern Alaska, British Columbia, and Washington) using data for 33 loci. The Russian populations differed from the North American populations in their patterns of allelic variation at many loci. The amount of genetic differentiation among populations from different rivers in Russia was comparable to that seen within similar-sized areas in North America.

Morphological diversity of odd generations of the north sea pink salmon (Oncorhynchus gorbuscha)

2020 ◽  
pp. 40-50
Author(s):  
S. Pustovoit
Keyword(s):  
Pink Salmon ◽  
Morphological Diversity ◽  
Oncorhynchus Gorbuscha ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
The North ◽  
Artificial Breeding ◽  
Marine Diversity ◽  
The North Sea ◽  
Analysis Of Variation ◽  
Combined Data

The analysis of variation of indicators of morphological diversity of three odd generations in the largest North-Okhotsk population of pink salmon of the Ola river (Tauy Bay) is carried out. The variation of morphological diversity in the samples collected from the beginning to the end of the spawning course in the Ola river has a two-vertex character — starting from the first sample to the next one, there is an increase in values, however, in the mid-spawning course, there is a decline, then again some growth. The reason for the detected variation in the indicator of marine diversity is the presence of two races in the population of the pink salmon of the Ola river — early and late. The linear diversity of male pink salmon according to the combined data for all years of research (µ = 18,52 ± 0,329) was higher than that of females (µ = 12,42 ± 0.269) (t = 14,49, p < 0,05). The weight diversity of males was also significantly higher (µ = 16,98 ± 0,330) than in females (µ = 11,14 ± 0,241), (t = 16,69, p < 0,05). The marked differences in the indicators of morphological diversity between females and males can be explained in the framework of the evolutionary theory of sex V. Geodakian. Artificial breeding of pink salmon at a fish breeding plant can have a significant impact on the morphological diversity of a mixed population.

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