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Creator:: Sogard, Susan M. and Olla, Bori L.
Abstract:: Larval and age-0 sablefish Anoplopoma fimbria reside in neustonic waters of the North Pacific during spring and summer. We estimated the potential impacts of elevated surface temperatures on ecological processes of growth, conversion efficiency, and behavior in early juvenile sablefish. Growth experiments tested a wide range of temperatures from 6...
Resource Type:: Article
Full Text:: . Sogard*, Bori L. Olla Alaska Fisheries Science Center, National Marine Fisheries Service, Hatfield

Creator:: Ryer, Clifford H. and Olla, Bori L.
Abstract:: Prior studies have demonstrated that juvenile walleye pollock Theragra chalcogramma forage socially in schools for spatially and temporally clumped food, but forage more independently for spatially and temporally dispersed food. One advantage of social foraging is that fish in schools may be able to locate more food clumps than fish...
Resource Type:: Article
Full Text:: fishes Clifford H. Ryer*, Bori L. Olla Alaska Fisheries Science Center, National Marine Fisheries

Creator:: Olla, Bori L. and Davis, Michael W.
Abstract:: This study examined, under controlled laboratory conditions, behavioral responses of larval walleye pollock (4 to 8 mm) to various physical factors that may potentially play a role in vertical movements and distribution. Diel periodicity in vertical distribution was evident and appeared to be under exogenous control. During the day, with...
Resource Type:: Article
Full Text:: Theragra chalcogramma under controlled laboratory conditions Bori L. Olla, Michael W. Davis

Creator:: Brodeur, Richard D., Sugisaki, Hiroya, and Hunt Jr., George L.
Abstract:: There has been a dramatic increase in jellyfish biomass over the eastern Bering Sea shelf since the early 1990s, which was previously hypothesized to have been triggered by changing climate and ocean conditions. We examine the hypothesis that the presence of these large carnivores has affected fisheries resources, either through...
Resource Type:: Article
Full Text:: . Brodeur1,*, Hiroya Sugisaki2, George L. Hunt Jr 3 1Northwest Fisheries Science Center, National Marine

Creator:: Copeman, L. A., Parrish, C. C., Gregory, R. S., Jamieson, R. E., Wells, J., and Whiticar, M. J.
Abstract:: Lipid classes, fatty acids (FAs), and stable carbon isotopes of FAs were used to investi- gate dietary sources of organic carbon for juvenile Atlantic cod Gadus morhua during settlement into eelgrass Zostera marina . Primary producers, epibenthic prey, zooplankton, and fish were collected from August to November 2002 in shallow...
Resource Type:: Article
Full Text:: food web of age-0 Atlantic cod Gadus morhua L. A. Copeman1,*, C. C. Parrish1, R. S. Gregory2, R. E

Creator:: Batchelder, Harold P.
Abstract:: Ingestion and respiration by Metridia pacifica, the dominant large copepod during autumn and winter in the subarctic Pacific, were investigated by shipboard and laboratory experiments. Diel variation in the rate of grazing on phytoplankton by M. pacifica was determined from measurements of gut pigment content and gastric evacuation rate. Both...
Resource Type:: Article
Full Text:: . Estimated filtering rates were 76 m1 female-' 6-' and 15 m1 C,-' d-l . Feedlng rates at low food

Creator:: Miller, Charles B., Cowles, Timothy J., Wiebe, Peter H., Copley, Nancy J., and Grigg, Helen
Abstract:: Calanus finmarchicus (Gunnerus) stratify narrowly near 500 m depth during their fifth copepodite resting phase in North Atlantic Slope Water off southern New England, USA. They probably achieve this by migration to a specific, daytime isolume. Photoperiod information provided by light intensity at depth could serve as a cure for...
Resource Type:: Article
Full Text:: Charles B. ille er', Timothy J. ~ o w l e s ' , Peter H. w i e b e 2 , Nancy J. copley2, Helen ~ r i g

Creator:: Ryer, Clifford H., Boersma, Kate S., and Hurst, Thomas P.
Abstract:: We explored whether anti-predator behavior and intrinsic growth are co-evolved traits in 3 co-occurring juvenile flatfish species: English sole Pleuronectes vetulus, Pacific halibut Hippoglossus stenolepis and northern rock sole Lepidopsetta polyxystra. English sole are risk prone, adopting behavior that renders them more vulnerable to predation, while northern rock sole are...
Resource Type:: Article
Full Text:: collection. Age-0 fish were maintained in 2 m diame- ter (3000 l) tanks and fed to satiation 3 times weekly

Creator:: Dickson, Mary-Lynn and Wheeler, Patricia A.
Abstract:: Ammonium uptake and regeneration rates were measured in time course experiments with 15N as a tracer. Both ammonium uptake and regeneration rates measured over 12 to 18 h remained essentially constant. However, as the length of the incubations increased the amount of usable data decreased dramatically due to substrate depletion...
Resource Type:: Article
Full Text:: Vol. 121: 239-248,1995 - l = MARINE ECOLOGY PROGRESS SERIES Mar

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