STUDIES ON THE DEVELOPMENT OF THE KIDNEY OF THE PACIFIC PINK SALMON (ONCORHYNCHUS GORBUSCHA (WALBAUM)): III. THE DEVELOPMENT OF THE MESONEPHROS WITH PARTICULAR REFERENCE TO THE MESONEPHRIC TUBULE

1960 ◽  
Vol 38 (1) ◽  
pp. 1-7 ◽  
Author(s):  
J. D. Newstead ◽  
Peter Ford
Keyword(s):  
Early Life ◽  
Cell Mass ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Intermediate Cell ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
The Pacific ◽  
Considerable Period

The origin and subsequent elaboration of the mesonephric tubules from condensation of cells derived from the intermediate cell mass is described from the earliest appearance of condensations to the differentiated stage in the year-old fingerling. It is noted that both the pronephric and mesonephric kidneys are present together for a considerable period of the early life of the pink salmon, though it is unlikely that both function simultaneously.

Use of the stratified-Petersen estimator in fisheries management: estimating the number of pink salmon (Oncorhynchus gorbuscha) spawners in the Fraser River

1998 ◽  
Vol 55 (2) ◽  
pp. 281-296 ◽  
Author(s):  
Carl James Schwarz ◽  
Carolyn Gail Taylor
Keyword(s):  
Pacific Salmon ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Fraser River ◽  
Differential Migration ◽  
Mark Recapture ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
The Pacific ◽  
Recent Developments

The simple-Petersen estimator is a well-known mark-recapture method to estimate animal abundance. Two key assumptions are equal catchability in both samples and complete mixing of tagged and untagged animals. If these are violated, severe bias can occur. The stratified-Petersen estimator can be used to account for some of the heterogeneity in catchability or mixing. In this paper, we first review recent developments in the stratified-Petersen experiment for fisheries audiences and demonstrate some of the practical problems that can occur that have not been discussed in the theoretical literature. Second, we present a case study to estimate the gross escapement of Fraser River pink salmon (Oncorhynchus gorbuscha) in 1991. The motivation for this study is a discrepancy of over 5 million fish between the estimates as derived by the Pacific Salmon Commission (PSC) (7.5 million fish based on a hydroacoustic method) and the Department of Fisheries and Oceans (DFO), Canada (13.0 million fish based on a mark-recapture method). One hypothesis put forward was that the discrepancy may be due to the use of a pooled-Petersen estimator when there is differential migration over time. The stratified-Petersen model suggests that little of this discrepancy can be explained by differential migration.

External Morphology of the Pink Salmon, Oncorhynchus gorbuscha, Introduced into Lake Superior

1979 ◽  
Vol 36 (10) ◽  
pp. 1283-1287 ◽  
Author(s):  
Richard E. Berg
Keyword(s):  
Key Words ◽  
Lake Superior ◽  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Morphometric Measurements ◽  
Male Fish ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
The Pacific ◽  
Male Head ◽  
Degree Of Differentiation

Meristic and morphometric measurements were taken from 33 male and 44 female mature pink salmon, Oncorhynchus gorbuscha, collected in three Lake Superior tributaries in Marquette County, Michigan. Significant sexual differences were found for eight characteristics in males and two in females. The male fish had a greater degree of differentiation in the head and hump regions; females had larger and longer anal fins. The Lake Superior fish were found to have shorter bodies, larger and longer fins, and more exaggerated development in the male head and hump than has been reported for the Pacific populations. Key words: pink salmon, salmonids, exotic species, Lake Superior, morphology

Survival of pink salmon (Oncorhynchus gorbuscha) fry to adulthood following a 10-day exposure to the aromatic hydrocarbon water-soluble fraction of crude oil and release to the Pacific Ocean

1999 ◽  
Vol 56 (11) ◽  
pp. 2087-2098 ◽  
Author(s):  
I K Birtwell ◽  
R Fink ◽  
D Brand ◽  
R Alexander ◽  
C D McAllister
Keyword(s):  
Pacific Ocean ◽  
Crude Oil ◽  
Soluble Fraction ◽  
Pink Salmon ◽  
Water Soluble ◽  
Oncorhynchus Gorbuscha ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Water Soluble Fraction ◽  
The Pacific ◽  
The Pacific Ocean

Saltwater-acclimated, coded-wire tagged, and adipose fin clipped pink salmon (Oncorhynchus gorbuscha) fry were exposed for 10 days to seawater (control) or 25-54 μg·L-1 (low dose) or 178-349 μg·L-1 (high dose) of the water-soluble fraction (WSF) of North Slope crude oil. The WSF was composed primarily of monoaromatics and was acutely lethal to the fry: 96-h LC50 ranged from 1 to 2.8 mg·L-1. After exposure the fry (30 000 per treatment) were released into the Pacific Ocean to complete their life cycle. The experiment was replicated in 1990, 1991, and 1992. There was no consistent significant dose-dependent effect of the 10-day exposure to the crude oil WSF on growth of the pink salmon prior to their release. Adult pink salmon from this experiment were captured in fisheries and also recovered from their natal Quinsam River, British Columbia. Pink salmon from each treatment group were recovered in similar numbers. Exposure of populations of fry to the WSF of crude oil and release to the Pacfic Ocean did not result in a detectable effect on their survival to maturity. Fry from all treatment groups incurred typically high mortality following release, and there were no discernible effects on survival that were attributable to exposure to the WSF of crude oil.

scholarly journals Lethal and Sublethal Effects in Pink Salmon (Oncorhynchus Gorbuscha) following Exposure to Five Aquaculture Chemotherapeutants

2021 ◽  
Author(s):  
Charanveer Sahota ◽  
Kassia Hyek ◽  
Brady Surbey ◽  
Chris Kennedy
Keyword(s):  
Confidence Intervals ◽  
Early Life ◽  
Sublethal Effects ◽  
Swimming Performance ◽  
Life Stage ◽  
Pink Salmon ◽  
Early Life Stage ◽  
Oncorhynchus Gorbuscha ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
Salmon Fry

Abstract Early life stages of Pink salmon (Oncorhynchus gorbuscha) are at risk of exposure to the active ingredients of chemotherapeutant formulations (hydrogen peroxide [HP], azamethiphos [AZ], emamectin benzoate [EB], cypermethrin [CP] and deltamethrin [DM]) used to control sea lice in salmon aquaculture. LC50 values (95% confidence intervals) for acute 48-h water exposures in order of least to most toxic to seawater-adapted pink salmon fry were: HP (227 [138–418] mg/L), EB (1090 [676–2006] µg/L), AZ (80 [52–161] µg/L), CP (5.1 [3.0-10.5] µg/L), and DM (980 [640–1800] ng/L). In subchronic 10-d lethality sediment exposure tests, LC50 values (95% confidence intervals) in order of least to most toxic were: EB (2065 [1384–3720] µg/kg), CP (97 [58–190] µg/kg), and DM (1035 [640–2000] ng/kg). Alterations in behaviour varied between chemicals; no chemical attracted pink salmon fry; fish avoided HP to a limited extent at 50 mg/L), as well as EB (300 µg/L), and AZ (50 µg/L). Significant concentration-dependent decreases in olfactory responsiveness to food extract were seen following AZ, CP and DM exposures that occurred at lower concentrations with longer exposure periods (10 µg/L, 0.5 µg/L and 100 ng/L thresholds at 168 h). Following 10-d sediment exposures, olfaction was only affected by CP exposure at 50 µg/kg. Significant decreases in swimming performance (Ucrit) occured for HP, AZ, CP and DM at concentrations as low as 100 mg/L, 10 µg/L, 2 µg/L and 200 ng/L, respectively. This study provides comprehensive data on the lethal and sublethal effects of aquaculture chemotherapeutant exposure in early life stage pink salmon.

Spawning Behavior and Early Life History of Pink Salmon (Oncorhynchus gorbuscha) in the Great Lakes

1982 ◽  
Vol 39 (10) ◽  
pp. 1353-1360 ◽  
Author(s):  
Wen-hwa Kwain
Keyword(s):  
Life History ◽  
Great Lakes ◽  
Early Life ◽  
Lake Superior ◽  
Pink Salmon ◽  
Early Life History ◽  
Oncorhynchus Gorbuscha ◽  
Spawning Behavior ◽  
Preferred Temperature ◽  
Pink Salmon Oncorhynchus Gorbuscha

Pink salmon (Oncorhynchus gorbuscha) from a single introduction to Lake Superior in 1956 have reproduced naturally and expanded into all the Great Lakes. Pink salmon feed at or near the surface as they approach spawning streams and some can still be found with food in the stomach on the spawning bed. Spawning behavior of these freshwater pink salmon is similar to that of marine stocks. Fecundity was 1060 ± 229 (24) per fish and total weight averaged 0.68 kg. Total mortality of embryos to 50% hatch ranged from 67 to 87% at five test temperatures (7, 9, 11, 13, 15 °C); 15 °C is considered to be the upper limit for freshwater pink salmon incubation. Juveniles moved downstream only at night and all juveniles usually took a month to complete this movement. Mean preferred temperature for pink salmon up to 36 wk old was 10 °C. Substantial numbers of pink salmon progeny of the 1975 year-class, which entered the Michipicoten River on Lake Superior to spawn in 1977 survived to, and matured at, each age from II to IV yr in a freshwater laboratory environment.Key words: pink salmon, feeding, spawning behavior, fecundity, incubation, emigration, preferred temperature, early life history, age IV, late maturation

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.

STUDIES ON THE DEVELOPMENT OF THE KIDNEY OF THE PACIFIC PINK SALMON, (ONCORHYNCHUS GORBUSCHA (WALBAUM)): I. THE DEVELOPMENT OF THE PRONEPHROS

1958 ◽  
Vol 36 (1) ◽  
pp. 15-21 ◽  
Author(s):  
P. Ford ◽  
J. D. Newstead
Keyword(s):  
Pink Salmon ◽  
Oncorhynchus Gorbuscha ◽  
Histological Differentiation ◽  
Pink Salmon Oncorhynchus Gorbuscha ◽  
The Pacific ◽  
Special Respect ◽  
Myeloid Tissue

The literature relating to pronephros development in fishes is discussed and the course of development in the pink salmon described. The vascularization of the kidney is described and the histological differentiation of the elements of the kidney listed with special respect to the epithelia of the tubules. The appearance of the myeloid tissue is noted.

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