Serum Transferrin Systems and the Hemoglobins of the Pacific Halibut (Hippoglossus stenolepis)

1969 ◽  
Vol 26 (9) ◽  
pp. 2351-2362 ◽  
Author(s):  
H. Tsuyuki ◽  
E. Roberts ◽  
E. A. Best
Keyword(s):  
Bering Sea ◽  
Serum Proteins ◽  
Rare Type ◽  
Population Analyses ◽  
Pacific Halibut ◽  
Eastern Bering Sea ◽  
The Pacific ◽  
Hippoglossus Stenolepis ◽  
Northeastern Pacific ◽  
Starch Gel

Based on starch-gel electrophoretic analyses of serum proteins of 1092 specimens of Pacific halibut sampled from the eastern Bering Sea and northeastern Pacific Ocean southward to southern British Columbia, three molecular species of transferrins were encountered. A fourth rare type was postulated to explain the observation of some phenotypes involving this transferrin. These transferrins, either singly or in combinations of two, accounted for the theoretically possible 10 phenotypes of which 8 were actually observed. Hereditary control by four codominant alleles (TfA, TfB, TfC, and TfD) is postulated to explain the heterogeneity of the transferrin patterns. The collections were arbitrarily divided into 10 geographic areas and gene frequency analyses were used to determine population structure. Phenotypic distribution was shown to be independent of age and sex. Of the 10 areas, only the collection from southeastern Alaska proved not to be homogeneous. Preliminary analysis of blood hemoglobins indicated that these proteins are not of value in population analyses.

A mixed-species yield model for eastern Bering Sea shelf flatfish fisheries

2002 ◽  
Vol 59 (2) ◽  
pp. 291-302 ◽  
Author(s):  
Paul D Spencer ◽  
Thomas K Wilderbuer ◽  
Chang Ik Zhang
Keyword(s):  
Bering Sea ◽  
Optimal Solution ◽  
Single Species ◽  
Mixed Species ◽  
Yield Model ◽  
Pacific Halibut ◽  
Eastern Bering Sea ◽  
Hippoglossus Stenolepis ◽  
Hippoglossoides Elassodon ◽  
Trawl Fisheries

A variety of eastern Bering Sea (EBS) flatfish including yellowfin sole (Limanda aspera), rock sole (Lepidopsetta bilineata), flathead sole (Hippoglossoides elassodon), and Alaska plaice (Pleuronectes quadrituberculatus), co-occur in various degrees in EBS trawl fisheries, impeding attempts to obtain single-species management targets. A further complication is the bycatch of Pacific halibut (Hippoglossus stenolepis); halibut bycatch limits, rather than single-species catch quotas, have been the primary factor regulating EBS flatfish harvest in recent years. To examine bycatch interactions among the EBS flatfish listed above, an equilibrium mixed-species multifishery model was developed. Equilibrium yield curves, scaled by recent average recruitment, are flat topped or asymptotically increasing, reflecting low fishing selectivity during the first several years of life and low growth relative to natural mortality. A linear programming analysis indicated that relaxation of the halibut bycatch constraint at the optimal solution of catch by fishery would produce approximately 20 times more flatfish yield than a similar relaxation of any flatfish catch quota. A strategy for establishing halibut bycatch limits that considers the foregone revenue in the halibut and flatfish trawl fisheries reveals how the choice of halibut bycatch limit is affected by the management goal for the flatfish complex.

scholarly journals Dispersal and behavior of Pacific halibut Hippoglossus stenolepis in the Bering Sea and Aleutian Islands region

2011 ◽  
Vol 12 (3) ◽  
pp. 225-239 ◽  
Author(s):  
AC Seitz ◽  
T Loher ◽  
BL Norcross ◽  
JL Nielsen
Keyword(s):  
Bering Sea ◽  
Aleutian Islands ◽  
Pacific Halibut ◽  
Hippoglossus Stenolepis ◽  
And Behavior ◽  
The Bering Sea

Interannual stability from ensemble modelling

2018 ◽  
Vol 75 (12) ◽  
pp. 2109-2113 ◽  
Author(s):  
Ian J. Stewart ◽  
Allan C. Hicks
Keyword(s):  
Stock Assessment ◽  
Base Case ◽  
Single Model ◽  
Sensitivity Testing ◽  
Ensemble Modelling ◽  
Temporal Correlations ◽  
Pacific Halibut ◽  
Simple Simulation ◽  
The Pacific ◽  
Hippoglossus Stenolepis

Ensemble modelling for fisheries analyses is increasing and may improve on single-model approaches through better representation of uncertainty, reduced potential for bias, and greater stability in results. Stability, defined here as deviations from model estimates as each year of data are added, may be due to the use of multiple models (rather than periodic changes to a single base-case model) and from the buffering effect of characterizing the central tendency with a set of models. However, stability against the addition of new data, although logically appealing, has not been explored for fisheries stock assessment. We use the Pacific halibut (Hippoglossus stenolepis) ensemble as an example and provide a simple simulation to explore the general behavior of results from an ensemble of models. Counterintuitively, we found the models in the halibut example showed high temporal correlations among deviations. However, we found that a small number of models with low among-model deviation correlations could show a stability benefit. Among-model deviation correlations may be a useful diagnostic for analysts developing ensembles or for those performing sensitivity testing of single-model assessments.

Age validation of four rockfishes (genera Sebastes and Sebastolobus) with bomb-produced radiocarbon

2020 ◽  
Vol 71 (10) ◽  
pp. 1355
Author(s):  
Craig Kastelle ◽  
Thomas Helser ◽  
Todd TenBrink ◽  
Charles Hutchinson ◽  
Betty Goetz ◽  
...  
Keyword(s):  
Age Determination ◽  
Gulf Of Alaska ◽  
Age Validation ◽  
Pacific Halibut ◽  
The Pacific ◽  
Hippoglossus Stenolepis ◽  
Deep Water Species ◽  
Growth Zones ◽  
Shortspine Thornyhead ◽  
Water Species

In rockfish (Family Scorpaenidae), age determination is difficult and the annual nature of otolith growth zones must be validated independently. We applied routine age determination to four species of Gulf of Alaska rockfish: two shallower-water species, namely harlequin rockfish (Sebastes variegatus) and redstripe rockfish (Sebastes proriger), and two deep-water species, namely shortspine thornyhead (Sebastolobus alascanus) and shortraker rockfish (Sebastes borealis). The estimated ages (counts of presumed annual growth zones in the otoliths) were then evaluated with bomb-produced radiocarbon (14C) and Bayesian modelling with Markov chain Monte Carlo simulations. This study successfully demonstrated the level of accuracy in estimated ages of redstripe rockfish (a 35% probability of underageing, and ~5% probability of overageing) and harlequin rockfish (a 100% probability that they were underaged by ~3 or 4 years). Measured Δ14C in shortspine thornyhead and shortraker rockfish otoliths was lower and increased later than expected. Hence, incorrect age determination could not be evaluated. This is likely caused by dissimilar environmental and biological availability of 14C between these two species and the Pacific halibut (Hippoglossus stenolepis) reference chronology, or underageing of these two species.

Distribution of early life Pacific halibut and comparison with Greenland halibut in the eastern Bering Sea

2016 ◽  
Vol 107 ◽  
pp. 31-42 ◽  
Author(s):  
D. Sohn ◽  
L. Ciannelli ◽  
J.T. Duffy-Anderson
Keyword(s):  
Bering Sea ◽  
Early Life ◽  
Greenland Halibut ◽  
Pacific Halibut ◽  
Eastern Bering Sea

Captures of Pacific halibut Hippoglossus stenolepis (Pleuronectidae) in Anadyr estuary of the Bering Sea

2017 ◽  
Vol 57 (2) ◽  
pp. 333-336
Author(s):  
R. L. Batanov ◽  
V. G. Chikilev ◽  
L. V. Mitenkova
Keyword(s):  
Bering Sea ◽  
Pacific Halibut ◽  
Hippoglossus Stenolepis ◽  
Anadyr Estuary ◽  
The Bering Sea

scholarly journals The Pacific Halibut, Hippoglossus stenolepis, and Sablefish, Anoplopoma fimbria, Individual Fishing Quota Program: A Twenty-year Retrospective

2020 ◽  
Vol 82 (1-2) ◽  
pp. 1-16
Author(s):  
Marysia Szymkowiak ◽  
Sarah Marrinan ◽  
Stephen Kasperski
Keyword(s):  
Anoplopoma Fimbria ◽  
Pacific Halibut ◽  
The Pacific ◽  
Hippoglossus Stenolepis ◽  
Individual Fishing Quota

Inventory of the eastern Bering Sea sponge fauna, geographic range extensions and description of Antho ridgwayi sp. nov.

Zootaxa ◽  
2019 ◽  
Vol 4567 (2) ◽  
pp. 236
Author(s):  
ROBERT P. STONE ◽  
HELMUT LEHNERT ◽  
GERALD R. HOFF
Keyword(s):  
New Species ◽  
Pacific Ocean ◽  
Bering Sea ◽  
New Records ◽  
Stock Assessment ◽  
Geographic Range ◽  
Eastern Bering Sea ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Hexactinellid Sponges

A total of 493 sponges were collected with a bottom trawl during annual groundfish stock assessment surveys in the eastern Bering Sea in 2013, 2015, and 2016 to build an inventory of species in this largely unexplored region. We report here principally on the demosponge fauna collected during those surveys because identifications of hexactinellids are incomplete. We identified 42 unique demosponge taxa from the collection including geographical range extensions for 30 species; seven are new records for the Pacific Ocean. The collection also included three species new to science; two have been previously described (Plicatellopsis borealis Lehnert & Stone 2017, Spongosorites beringensis Lehnert & Stone 2017) and Antho ridgwayi sp. nov. described here. The new species differed from all northern hemisphere congeners in the complements and sizes of spicules. We document that the region is more species rich than previously suspected, particularly the continental slope where the majority of hexactinellid sponges are located. 

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