Comparison of Some Life History Characteristics of Pacific Herring (Clupea pallasi) from the Canadian Pacific Ocean and Beaufort Sea

1993 ◽  
Vol 50 (5) ◽  
pp. 964-971 ◽  
Author(s):  
R. W. Tanasichuk ◽  
A. H. Kristofferson ◽  
D. V. Gillman
Keyword(s):  
Pacific Ocean ◽  
Beaufort Sea ◽  
Larval Period ◽  
Pacific Herring ◽  
Strait Of Georgia ◽  
Clupea Pallasi ◽  
Surplus Energy ◽  
Ripe Ovary ◽  
Using Data ◽  
Sea Fish

We compared several growth and reproductive characteristics of Pacific herring (Clupea pallasi) from the Canadian Pacific Ocean and Beaufort Sea using data for 2310 fish gillnetted in the northern Strait of Georgia or near Tuktoyaktuk, N.W.T., over the 1985 spawning season. Weight-at-age was similar but Beaufort Sea fish were longer-at-age. Total weight-at-length was significantly greater for Strait of Georgia herring because their size-specific ripe ovary weights were 2.1 times greater. We attributed differences in growth and surplus energy allocation to adult instantaneous mortality rates being 1.8 times higher for Strait of Georgia herring. Size-specific ripe egg weight was 30% smaller in Beaufort Sea herring presumably because warmer sea temperatures over the larval period resulted in a higher mortality rate. Weight-specific fecundity was 1.5 times greater in Strait of Georgia fish. Ovarian growth rates near spawning were lower in Beaufort Sea herring because they mature in colder water.

Age-specific natural mortality rates of adult Pacific herring (Clupea pallasi) from southern British Columbia

2000 ◽  
Vol 57 (11) ◽  
pp. 2258-2266 ◽  
Author(s):  
R W Tanasichuk
Keyword(s):  
British Columbia ◽  
Mortality Rate ◽  
Sampling Bias ◽  
Mortality Rates ◽  
Energy Requirements ◽  
Pacific Herring ◽  
Natural Mortality ◽  
Clupea Pallasi ◽  
Surplus Energy ◽  
Using Data

I used data for over 665 000 Pacific herring (Clupea pallasi) seined or gillnetted in southern British Columbia between 1951 and 1998 to estimate age- and year-specific adult natural mortality rates. Apparent sampling bias precluded using data collected before 1980. The instantaneous natural mortality rate is an increasing exponential function of age. Surplus energy requirements for gonad recrudescence appear to cause the death of adult herring.

Growth and Maturation of Pacific Herring (Clupea harengus pallasi) in the Strait of Georgia

1985 ◽  
Vol 42 (S1) ◽  
pp. s138-s146 ◽  
Author(s):  
V. Haist ◽  
M. Stocker
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Clupea Harengus ◽  
Sea Surface ◽  
Pacific Herring ◽  
Juvenile Growth ◽  
Strait Of Georgia ◽  
Surplus Energy ◽  
Clupea Harengus Pallasi ◽  
Stock Biomass

Juvenile growth rate, adult surplus energy, and the maturation schedule for the Strait of Georgia Pacific herring (Clupea harengus pallasi) stock were investigated over the period 1950–81. The variance in weight at age 2 is largely accounted for by juvenile abundance and sea surface temperature, indicating density-dependent juvenile growth moderated by environmental factors. Density and environmental factors have been equally important in moderating juvenile growth. Yearly variation in maturation of 3-yr-old herring is related to their average length; however, in two of the eight years studied the 3-yr-olds matured at considerably smaller sizes. The variance in adult surplus energy (growth plus gonad production) was largely accounted for by body weight, adult biomass, and sea surface temperature. A dome-shaped relationship between surplus energy and biomass was indicated, suggesting that over a broad range of population size, adult surplus energy is not density dependent. The relationship of sea surface temperature to both juvenile growth and adult surplus energy was quadratic with an optimum value. Recruitment biomass has been a relatively larger component than adult production of total stock growth, particularly during the period of high fishing intensity. This resulted in large fluctuations in stock biomass; in recent years, with lower fishing intensity, adult production has been a larger component of stock growth, and the stock biomass has become more stable.

Factors linking Pacific herring (Clupea pallasi) productivity and the spring plankton bloom in the Strait of Georgia, British Columbia, Canada

2013 ◽  
Vol 115 ◽  
pp. 103-110 ◽  
Author(s):  
J.F. Schweigert ◽  
M. Thompson ◽  
C. Fort ◽  
D.E. Hay ◽  
T.W. Therriault ◽  
...  
Keyword(s):  
British Columbia ◽  
Pacific Herring ◽  
Strait Of Georgia ◽  
Clupea Pallasi ◽  
Plankton Bloom

Tagging of Pacific herring Clupea pallasi from 1936–1992: a review with comments on homing, geographic fidelity, and straying

2001 ◽  
Vol 58 (7) ◽  
pp. 1356-1370
Author(s):  
D E Hay ◽  
P B McCarter ◽  
K S Daniel
Keyword(s):  
British Columbia ◽  
Geographic Area ◽  
Coastal Areas ◽  
High Fidelity ◽  
Pacific Herring ◽  
Biological Processes ◽  
Electronic Database ◽  
Strait Of Georgia ◽  
Clupea Pallasi ◽  
Small Areas

Nearly 1.6 million tagged herring (Clupea pallasi) were released in two separate programs (1936–1967 and 1979–1992) in British Columbia. Several thousand tags were released in each of 955 release sessions. Over 85% of the release sessions had subsequent recoveries. Almost 43 000 tags were recovered over all years. We re-assembled the tagging data into an electronic database, geo-referenced all tag release and recovery data, analysed spatial movements, and estimated straying and fidelity rates. The analyses do not wholly support the conclusions of previous work indicating high homing rates to local coastal areas. Estimates of fidelity, defined as the proportion of tags recovered in the same area as released, varied with the size of the geographic area used in the analyses. Fidelity rates are high for large areas, such as the Strait of Georgia (~10 000 km2), but lower for small geographical areas, such as inlets or bays (~100 km2). High fidelity is not necessarily evidence for "homing." Homing and fidelity are different biological processes and tagging cannot necessarily distinguish between them. Although fidelity rates for small areas are generally low, there are exceptions that may be evidence for the existence of biologically distinct populations in certain areas.

scholarly journals Recruitment forecasting using indices of young-of-the-year Pacific herring (Clupea pallasi) abundance in the Strait of Georgia (BC)

2009 ◽  
Vol 66 (8) ◽  
pp. 1681-1687 ◽  
Author(s):  
Jacob F. Schweigert ◽  
Douglas E. Hay ◽  
Thomas W. Therriault ◽  
Matthew Thompson ◽  
Carl W. Haegele
Keyword(s):  
Fishery Management ◽  
Relative Size ◽  
Qualitative Evaluation ◽  
Pacific Herring ◽  
Strait Of Georgia ◽  
Clupea Pallasi ◽  
Stock Biomass ◽  
Spawning Stock ◽  
Young Of The Year ◽  
The Relationship

Abstract Schweigert, J. F., Hay, D. E., Therriault, T. W., Thompson, M., and Haegele, C. W. 2009. Recruitment forecasting using indices of young-of-the-year Pacific herring (Clupea pallasi) abundance in the Strait of Georgia (BC). – ICES Journal of Marine Science, 66: 1681–1687. Within the Strait of Georgia (BC, Canada), recruitment of Pacific herring (Clupea pallasi) to the spawning stock at age 3 can be highly variable, and this component may compose a major portion of the spawning-stock biomass. Therefore, a reliable method of forecasting recruitment strength would be useful for determining total allowable catches for the fishery. We developed an empirical approach to forecasting recruitment from young-of-the-year (YOY) surveys using purse-seine sampling in late September and evaluate its predictive capability for estimating the relative size of a year class before it enters the fishery. For each year, we compared YOY catches-by-weight with the number of age-3 recruits derived from subsequent catch-at-age analyses. The relationship is positive but not statistically significant because of considerable annual variation in the estimates. However, it is worth noting that in years when YOY herring were least abundant, the resulting cohort also was low. Consequently, although the relationship may not be sufficiently precise for accurate recruitment forecasting, it can be used by fishery management for the qualitative evaluation of the likelihood of strong or weak returns in future seasons when setting quotas for the fishery.

Biochemical Population Genetics of Pacific Herring (Clupea pallasi)

1984 ◽  
Vol 41 (6) ◽  
pp. 856-864 ◽  
Author(s):  
W. Stewart Grant ◽  
Fred M. Utter
Keyword(s):  
Genetic Structure ◽  
Pacific Ocean ◽  
Bering Sea ◽  
North Pacific ◽  
North Pacific Ocean ◽  
Gulf Of Alaska ◽  
Pacific Herring ◽  
Stock Structure ◽  
Clupea Pallasi ◽  
Spawning Areas

Studies of stock structure in Pacific herring (Clupea pallasi) using geographic variation in morphology and growth, and tagging methods, have shown that Pacific herring are subdivided into numerous more or less distinct populations or stocks having limited migration between stocks. Homing of adults to previous spawning areas and larval retention mechanisms may enhance reproductive isolation between spawning areas and have been postulated to produce genetic differences between stocks. In this study the geographic distributions of inherited biochemical markers were used to measure the genetic component of stock structure in Pacific herring. The gene products of 40 protein-coding loci were examined by starch–gel electrophoresis in 21 samples collected from locations extending over most of the range of Pacific herring in the North Pacific Ocean and Bering Sea. These results show that there is a very small genetic component to the stock structure described by nongenetic methods. No significant allele-frequency differences were detected among three samples of Asian herring. In the eastern Bering Sea, the northern populations were genetically distinct from southern populations on the Seward Peninsula and in Bristol Bay, but no genetic structure was detected within these areas. In the eastern North Pacific Ocean, the Gulf of Alaska populations were genetically distinct from the remaining southern populations. Some genetic structure was detected in the Gulf of Alaska but not among the remaining southern populations. Using the stepping-stone model of migration and the observed amount of genetic divergence among populations, we show that small-scale genetic differences would not be expected, given the amount of migration observed between spawning areas. Another important result of this study is the discovery of two genetic races, Asian–Bering Sea herring and eastern North Pacific herring, having an average Nei genetic distance (D) between samples of the two races of 0.039; D between populations within each race averaged 0.0009. We postulate that the two North Pacific races of herring arose as a result of repeated Pleistocene glaciation on the southern coast of Alaska, which created a barrier to gene flow and permitted the two oceanic groups to diverge genetically.

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