Results 121 to 130 of about 375 (161)
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Atresia of developing Oocytes in walleye pollock Theragra chalcogramma
Journal of Ichthyology, 2015The present study describes the process and characteristic features of oocyte resorption throughout its developmental stages in T. chalcogramma (Pallas, 1814). Histological methods revealed two major resorption pathways: follicular and follicular-histiocytic atresia.
A. M. Privalikhin +2 more
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Corroborating the ages of walleye pollock (Theragra chalcogramma)
Marine and Freshwater Research, 2006Fish ageing researchers have long recognised the importance of validating age-reading methodologies. The strongest age validations require the acquisition of ageing structures from fish of known-ages, or specimens whose ages are appropriate for bomb carbon validation.
Daniel K. Kimura +4 more
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Classification of Ovarian Stages of Walleye Pollock (Theragra chalcogramma)
Resiliency of Gadid Stocks to Fishing and Climate Change, 2008Walleye pollock, Theragra chalcogramma, is the most commercially important species in the eastern Bering Sea. Estimates of maturity are critical for setting an appropriate harvest rate for pollock spawning biomass, and correct classification of ovaries into a maturity condition is necessary for accurate estimation of maturity.
Jennifer Stahl, Gordon Kruse
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Walleye pollock (Theragra chalcogramma) behavior in midwater trawls
Fisheries Research, 2013Abstract Trawls are standard tools for surveying fisheries resources, yet they are selective in what they retain, and thus provide potentially misleading information about fish populations. In order to evaluate the potential for selective retention in a midwater survey trawl used in conjunction with acoustic surveys of walleye pollock, fish behavior ...
Kresimir Williams +2 more
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Purification and Properties of an Aminopeptidase from Alaska Pollack, Theragra chalcogramma, Roe
The Journal of Biochemistry, 1989An aminopeptidase was isolated from a soluble fraction of Alaska pollack roe in the presence of 2-mercaptoethanol by fractionation with ammonium sulfate and column chromatography on DEAE-cellulose, hydroxyapatite, and Sephadex G-200. The molecular weight of the enzyme was estimated to be 125,000 and 105,000 by gel filtration and sodium dodecyl sulfate ...
T K, Chiou, T, Matsui, S, Konosu
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Diel patterns of behavior in juvenile walleye pollock,Theragra chalcogramma
Environmental Biology of Fishes, 1996In laboratory experiments, we contrasted the behavior of juvenile walleye pollock under dark and light conditions, comparing group cohesion, activity levels, vertical distribution, and movement into cold water when the water column was thermally stratified.
Susan M. Sogard, Bori L. Olla
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Quality of Mince from Alaska Pollock (Theragra chalcogramma) Frames
Journal of Aquatic Food Product Technology, 1994The quality and frozen stability of minces produced from Alaska pollock (Theragra chalcogramma) frames were compared against commercially produced fillet mince. Fresh frame mince had a higher defect level, lower nutritional content, and darker color. Cooked frame mince had a softer texture than commercial mince.
Charles Crapo, Brian Himelbloom
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Population Structure and Dynamics of Walleye Pollock, Theragra chalcogramma
1999The population biology of walleye pollock, Theragra chalcogramma, is described including its life history, population dynamics, genetic structure and metapopulation structure. Walleye pollock is an important species in the ecosystems of the subarctic Pacific Ocean, and is one of the world’s largest fisheries.
K.M. Bailey +3 more
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Development of the escape response in larval walleye pollock ( Theragra chalcogramma )
Marine Biology, 2001The development of the escape response of walleye pollock (Theragra chalcogramma) larvae from attacks by macrozooplanktonic and small-fish predators was quantified in laboratory experiments. Behavior was recorded using video cameras with silhouette illumination from infrared-emitting diodes and by visual observation. Laboratory-reared larvae of 1, 3, 8,
Sugisaki H., Bailey K., Brodeur R.
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Optimum temperature for growth of juvenile walleye pollock Theragra chalcogramma
Journal of Experimental Marine Biology and Ecology, 2007Abstract Food consumption (FC), specific growth rate (SGR), and gross growth efficiency (GGE) were measured for juvenile walleye pollock (initial size 112–153 mm fork length) fed euphausiids at temperatures ( T ) between 2 and 16 °C. FC increased up to 12 °C (7.3% of body weight) and was slightly lower at 16 °C. SGR also increased up to 12 °C (2% d −
K. Kooka +4 more
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