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Buoyancy regulation and barotrauma in two species of nearshore rockfish

Creator:: Parker, Steven J., McElderry, Howard I., Rankin, Polly S., and Hannah, Robert W.
Abstract:: Fishes with closed swim bladders regulate buoyancy during depth changes by secreting and resorbing swim bladder gases. Forced ascent during fishery capture results in barotrauma caused by rapid expansion and exsolution of gases from body fluids. Pressure changes in hyperbaric chambers were used to examine changes in swim bladder integrity...
Resource Type:: Article
Full Text:: rockfish required up to 48 h to acclimate from 4 atmospheres absolute (ATA; depth equivalent of 30 m) to

Effect of light on juvenile walleye pollock shoaling and their interaction with predators

Creator:: Ryer, Clifford H. and Olla, Bori L.
Abstract:: Research was undertaken to examine the influence of light intensity on the shoaling behavior, activity and anti-predator behavior of juvenile walleye pollock Theragra chalcogramma. Under a 12 h light/12 h dark photoperiod, juveniles displayed a diurnal shoaling and activity pattern, characterized by fish swimming in cohesive groups during the day,...
Resource Type:: Article
Full Text:: interaction with predators Clifford H. Ryer*, Bori L. Olla Fisheries Behavioral Ecology Group, Alaska

The divergent effect of capture depth and associated barotrauma on post-recompression survival of canary (Sebastes pinniger) and yelloweye rockfish (S. ruberrimus)

Creator:: Hannah, Robert W., Rankin, Polly S., and Blume, Matthew T. O.
Abstract:: We evaluated the external signs of barotrauma and 48-h post-recompression survival for 17 54 canary and 81 yelloweye rockfish captured at depths of 46-174 m, much deeper than a 18 similar prior experiment, but within the depth range of recreational fishery catch and 19 discard. Survival was measured using specialized...
Resource Type:: Article
Full Text:: , at the deeper depths of 218 capture (Figure 4). In the combined data set, 48-h post-recompression

Total Lipids, Lipid Classes, and Fatty Acids of Newly Settled Red King Crab (Paralithodes camtschaticus): Comparison of hatchery-cultured and wild crabs

Creator:: Copeman, Louise A., Stoner, Allan W., Ottmar, Michele L., Daly, Benjamin, Parrish, Christopher C., and Eckert, Ginny L.
Abstract:: Little is known about the nutrition or lipid metabolism of cold-water crabs, particularly in the North Pacific. We undertook a 2-part study to understand more completely the energetics and nutritional requirements of juvenile red king crab (RKC; Paralithodes canusehaticus). First, we investigated changes in proximate composition, total lipids (TLs), lipid...
Resource Type:: Article
Full Text:: BENJAMIN DALY,3 CHRISTOPHER C. PARRISH,4 AND GINNY L. ECKERT5 1Cooperative Institute for Marine Resources

Linking predators to seasonality of upwelling: Using food web indicators and path analysis to infer trophic connections

Creator:: Thompson, Sarah Ann, Sydeman, William J., Santora, Jarrod A., Black, Bryan A., Suryan, Robert M., Calambokidis, John, Peterson, William T., and Bograd, Steven J.
Abstract:: Upwelling in eastern boundary current systems is a primary driver of ecosystem productivity. Typically, peak upwelling occurs during spring and summer, but winter upwelling may also be important to ecosystem functions. In this study, we investigated the hypothesis that winter and spring/summer upwelling, operating through indirect trophic interactions, are important...
Resource Type:: Article
Full Text:: ). Phytoplankton responses generally lag upwelling by �4–8 days (Dugdale and Wilkerson, 1989; Service et al., 1998

Escaping the Surface: The Effect of Capture Depth on Submergence Success of Surface-Released Pacific Rockfish

Creator:: Hannah, Robert W., Parker, Steven J., and Matteson, Keith M.
Abstract:: We evaluated the effect of capture depth and fish size on the ability of several Pacific rockfishes Sebastes spp. to resubmerge after hook-and-line capture and surface release. We observed fish as they were released into a bottomless floating enclosure, and we recorded submergence success within a 5-min time limit. Submergence...
Resource Type:: Article
Full Text:: Copper rockfish S. caurinus (33–45) 0 1 100.0 1 100.0 2 100.0 4 Quillback rockfish S. maliger (28–41) 0 0

Behavior of Nine Species of Pacific Rockfish after Hook-and-Line Capture, Recompression, and Release

Creator:: Hannah, Robert W. and Matteson, Keith M.
Abstract:: We evaluated the effect of barotrauma on the behavior of nine species of Pacific rockfish Sebastes spp. after hook-and-line capture and release using a video-equipped underwater release cage. Sampling was conducted across a range of bottom depths (12-194 m), mostly where barotrauma resulting from an expanded swim bladder and gaseous...
Resource Type:: Article
Full Text:: rockfish S. nebulosus took over 250 h to acclimate to a 4 atmospheres (depth equivalent of 30 m) change in

Buoyancy regulation by hatchery and wild coho salmon during the transition from freshwater to marine environments

Creator:: Weitkamp, Laurie A.
Abstract:: One aspect of diadromy that has received little attention is buoyancy regulation in fish moving between freshwater and marine environments. Because of density differences between the two water types, fish must alter their whole-fish density (WFD) or they will become positively (float) or negatively (sink) buoyant as they change environments....
Resource Type:: Article
Full Text:: swim bladder intact, fish were dried at 1058C for 48 h and mechanically homoge- nized. Whole-fish

Distribution and community structure of ichthyoplankton off the coast of Oregon, USA, in 2000 and 2002

Creator:: Auth, Toby D. and Brodeur, Richard D.
Abstract:: The species composition, distribution and concentration of ichthyoplankton off the central Oregon coast in the NE Pacific Ocean were examined during 2000 and 2002 to investigate annual, seasonal, vertical, and cross-shelf variability. Larval concentrations were also analyzed in relation to water temperature and salinity. The 281 samples collected from 5...
Resource Type:: Article
Full Text:: annual, seasonal, coastal/offshore and depth-stratified scales. The Shannon-Wiener diversity index (H

Molting, growth, and energetics of newly-settled blue king crab: Effects of temperature and comparisons with red king crab

Creator:: Stoner, Allan W., Copeman, Louise A., and Ottmar, Michele L.
Abstract:: Populations of blue king crab (BKC) (Paralithodes platypus Brandt, 1850) have declined in Alaskan waters over recent decades, and substantial effort is being made to rehabilitate the once important fishery with releases of hatchery-reared juveniles. However, little is known about the species' first year of post-settlement life. This study was...
Resource Type:: Article
Full Text:: condition in marine crustaceans, such as American lobster (Homarus americanum H. Milne Edwards, 1837) and

ScholarsArchive@OSU

Buoyancy regulation and barotrauma in two species of nearshore rockfish

Effect of light on juvenile walleye pollock shoaling and their interaction with predators

The divergent effect of capture depth and associated barotrauma on post-recompression survival of canary (Sebastes pinniger) and yelloweye rockfish (S. ruberrimus)

Total Lipids, Lipid Classes, and Fatty Acids of Newly Settled Red King Crab (Paralithodes camtschaticus): Comparison of hatchery-cultured and wild crabs

Linking predators to seasonality of upwelling: Using food web indicators and path analysis to infer trophic connections

Escaping the Surface: The Effect of Capture Depth on Submergence Success of Surface-Released Pacific Rockfish

Behavior of Nine Species of Pacific Rockfish after Hook-and-Line Capture, Recompression, and Release

Buoyancy regulation by hatchery and wild coho salmon during the transition from freshwater to marine environments

Distribution and community structure of ichthyoplankton off the coast of Oregon, USA, in 2000 and 2002

Molting, growth, and energetics of newly-settled blue king crab: Effects of temperature and comparisons with red king crab

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