Two egg-derived molecules in sperm motility initiation and fertilization in the Pacific herring (Clupea pallasi)

Abstract Hulson, P-J. F., Miller, S. E., Quinn, T. J. II, Marty, G. D., Moffitt, S. D., and Funk, F. 2008. Data conflicts in fishery models: incorporating hydroacoustic data into the Prince William Sound Pacific herring assessment model. – ICES Journal of Marine Science, 65: 25–43. Data conflicts present difficulties in running integrated assessment models as shown by the age-structured assessment (ASA) model for the Pacific herring population in Prince William Sound (PWS), Alaska. After the 1989 “Exxon Valdez” oil spill in PWS, the Pacific herring (Clupea pallasi) ASA model indicated a significant decline in the population, starting in winter 1992. Back-calculated estimates from hydroacoustic abundance surveys that started in 1993 suggested that the ASA model overestimated herring biomass from 1990 to 1992 and that the population decline actually began in 1989. To expose data conflicts, we incorporated the hydroacoustic survey information with all available spawning population indices directly into the age-structured model. In this way, the substantial uncertainty about population parameters from 1989 to 1992 attributable to data conflicts was quantified. Consequently, the magnitude of declines for that period estimated from both linear and ASA models depend on the type of integrated datasets and weighting, particularly with indices of male spawners. Our view is that a major decline started in 1992 when disease affected a large population that was in weakened condition. Other views are consistent with the existing data too.

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Impacts of Suspended Sediments on Fertilization, Embryonic Development, and Early Larval Life Stages of the Pacific Herring, Clupea pallasi

Biological Bulletin ◽

10.1086/bblv216n2p175 ◽

2009 ◽

Vol 216 (2) ◽

pp. 175-187 ◽

Cited By ~ 25

Author(s):

Frederick J. Griffin ◽

Edmund H. Smith ◽

Carol A. Vines ◽

Gary N. Cherr

Keyword(s):

Embryonic Development ◽

Suspended Sediments ◽

Pacific Herring ◽

Life Stages ◽

Larval Life ◽

Clupea Pallasi ◽

The Pacific

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Sperm motility initiation factor is a minor component of the Pacific herring egg chorion

Development Growth & Differentiation ◽

10.1046/j.1440-169x.1996.t01-1-00009.x ◽

1996 ◽

Vol 38 (2) ◽

pp. 193-202 ◽

Cited By ~ 23

Author(s):

Frederick J. Griffin ◽

Carol A. Vines ◽

Murali C. Pillai ◽

Ryuzo Yanagimachi ◽

Gary N. Cherr

Keyword(s):

Sperm Motility ◽

Minor Component ◽

Initiation Factor ◽

Pacific Herring ◽

The Pacific ◽

A Minor

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Simulated and observed response of the southwest Vancouver Island pelagic ecosystem to oceanic conditions in the 1990s

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f99-170 ◽

1999 ◽

Vol 56 (12) ◽

pp. 2433-2443 ◽

Cited By ~ 15

Author(s):

Clifford KL Robinson ◽

Daniel M Ware

Keyword(s):

Empirical Data ◽

Coastal Upwelling ◽

Condition Factor ◽

Model Performance ◽

Ecosystem Model ◽

Vancouver Island ◽

Pacific Herring ◽

Pelagic Ecosystem ◽

Clupea Pallasi ◽

The Pacific

In this paper, we discuss changes in the ocean climate around La Perouse Bank off southwestern Vancouver Island, British Columbia, and its influence on the functioning of the pelagic ecosystem. We compare results of a one-dimensional simulation model of plankton and fish production and biomass dynamics with empirical data collected in the 1990s. Comparisons of simulation results with empirical data indicate that the La Perouse model can account for relative interannual changes in copepod biomass, euphausiid biomass and production, the consumption of Pacific herring (Clupea pallasi) by Pacific hake (Merluccius productus), and the growth condition factor of Pacific hake. The model is less successful at capturing changes in spring diatom biomass, the proportion of euphausiids in the Pacific hake diet, and interannual variability in the Pacific herring condition factor. A measure of overall model performance suggests that the La Perouse ecosystem model performs equally well in both strong and weak upwelling periods. The La Perouse ecosystem model has been used to generate an annual index of net phytoplankton and macrozooplankton production for the coastal upwelling region off southwestern Vancouver Island from 1967 to 1998.

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Role of disease in abundance of a Pacific herring (Clupea pallasi) population

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f03-109 ◽

2003 ◽

Vol 60 (10) ◽

pp. 1258-1265 ◽

Cited By ~ 52

Author(s):

Gary D Marty ◽

Terrance J. Quinn II ◽

Greg Carpenter ◽

Theodore R Meyers ◽

Neil H Willits

Keyword(s):

Stock Assessment ◽

Assessment Model ◽

Fish Mortality ◽

Viral Hemorrhagic Septicemia Virus ◽

Pacific Herring ◽

Population Abundance ◽

Total N ◽

Clupea Pallasi ◽

The Pacific ◽

Age Structured

Disease significantly affects population abundance of Pacific herring (Clupea pallasi). Comprehensive epidemiological study of the Pacific herring population of Prince William Sound, Alaska, U.S.A., from 1994 to 2000 included complete necropsy examination of 230500 fish each spring and 40160 fish each fall (total n = 2983 fish). Mortality is best estimated, through modifications of an age-structured assessment model, using a disease index that combines the prevalence of viral hemorrhagic septicemia virus (VHSV) with the prevalence of ulcers. Risk factors for an epidemic include poor body condition and abundant recruitment before spawning in the spring. Prevalence of the pathogen Ichthyophonus hoferi increased as fish aged, but changes in I. hoferi prevalence were not related to changes in population abundance. Disease that caused an epidemic in 1998 (VHSV and ulcers) nearly disappeared from the population when changes in abundance were detected by traditional stock assessment methods in 1999. Disease significantly affects recruitment the two lowest recruitment estimates on record, in 1994 and 1999, followed increased natural mortality of adults in 1993 and 1998.

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