Index Catalog // ScholarsArchive@OSU

Spatial Changes in Trawl Fishing Effort in Response to Footrope Diameter Restrictions in the U.S. West Coast Bottom Trawl Fishery

Creator:: Hannah, Robert W.
Abstract:: Changes in the spatial distribution of U.S. west coast bottom-trawl effort in relation to areas of prime habitat for rockfish Sebastes spp. were evaluated between 1992 and 2001. Prime trawlable rockfish habitat (PTRH) was defined based on the spatial distribution of high rockfish catches from logbook data for 1992–1995. Bottom-trawl...
Resource Type:: Article
Full Text:: Trawl Fishery Robert W. Hannah a a Oregon Department of Fish and Wildlife, Marine Resources Program

The influence of bait and stereo video on the performance of a video lander as a survey tool for marine demersal reef fishes in Oregon waters

Creator:: Hannah, Robert W. and Blume, Matthew T. O.
Abstract:: We evaluated how the use of bait as a fish attractant influenced the species and size composition 20 of demersal fishes viewed with a stereo video lander, at 160 sampling sites at Stonewall Bank, a 21 deepwater rocky reef complex in Oregon waters. We also studied the effectiveness of stereo...
Resource Type:: Article
Full Text:: 4 Robert W. Hannah* 5 Matthew T. O. Blume 6 7 8 Oregon Department of Fish and Wildlife 9

Site Fidelity and Movement of Eight Species of Pacific Rockfish at a High-Relief Rocky Reef on the Oregon Coast

Creator:: Hannah, Robert W. and Rankin, Polly S.
Abstract:: We used acoustic telemetry techniques to study the movements of eight species of Pacific rockfish (genus Sebastes) inhabiting Siletz Reef, a high-relief rocky reef complex on the Oregon coast. Our primary interest was evaluating potential residence times for rockfish species in small, no-take marine protected areas (MPAs) like those recently...
Resource Type:: Article
Full Text:: Movement of Eight Species of Pacific Rockfish at a High-Relief Rocky Reef on the Oregon Coast Robert W

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:: after Hook-and-Line Capture, Recompression, and Release Robert W. Hannah a & Keith M. Matteson a a

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:: (S. ruberrimus) 2 3 Robert W. Hannah*, Polly S. Rankin, Matthew T.O. Blume 4 5 Oregon

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:: Surface: The Effect of Capture Depth on Submergence Success of Surface-Released Pacific Rockfish Robert W

Evaluation of a Selective Flatfish Trawl and Diel Variation in Rockfish Catchability as Bycatch Reduction Tools in the Deepwater Complex Fishery off the U.S. West Coast

Creator:: Hannah, Robert W., Parker, Steven J., and Buell, Troy V.
Abstract:: We tested the potential of a selective flatfish trawl to reduce bycatch of slope rockfish in the upper continental slope bottom-trawl fishery (250–500 m) on the U.S. West Coast. The trawl we tested differed from typical slope trawls in that it was a low-rise, two-seam trawl with a severely cut...
Resource Type:: Article
Full Text:: as Bycatch Reduction Tools in the Deepwater Complex Fishery off the U.S. West Coast Robert W. Hannah

Near-Real-Time Acoustic Monitoring of Beaked Whales and Other Cetaceans Using a Seaglider (TM)

Creator:: Klinck, Holger, Mellinger, David K., Klinck, Karolin, Bogue, Neil M., Luby, James C., Jump, William A., Shilling, Geoffrey B., Litchendorf, Trina, Wood, Angela S., Schorr, Gregory S., and Baird, Robin W.
Abstract:: Correction 10 Aug 2012: Klinck H, Mellinger DK, Klinck K, Bogue NM, Luby JC, et al. (2012) Correction: Near-Real-Time Acoustic Monitoring of Beaked Whales and Other Cetaceans Using a Seaglider™. PLOS ONE 7(8): 10.1371/annotation/57ad0b82-87c4-472d-b90b-b9c6f84947f8.
Resource Type:: Article
Full Text:: . Wood2, Gregory S. Schorr3, Robin W. Baird3 1 NOAA Pacific Marine Environmental Laboratory, Hatfield

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:: . Parker a , Howard I. McElderry b , Polly S. Rankin a & Robert W. Hannah a a Oregon Department of Fish and

Discard Mortality of Trawl-Caught Lingcod in Relation to Tow Duration and Time on Deck

Creator:: Parker, Steven J., Rankin, Polly S., Hannah, Robert W., and Schreck, Carl B.
Abstract:: The lingcod Ophiodon elongatus is a benthic marine fish commonly caught by groundfish trawlers and discarded due to low catch limits. Managers must account for the mortality of bycatch to assess population status accurately. Our objectives were to estimate the actual mortality of trawl-discarded lingcod (50- 84 cm) and describe...
Resource Type:: Article
Full Text:: Tow Duration and Time on Deck Steven J. Parker a , Polly S. Rankin a , Robert W. Hannah a & Carl B

ScholarsArchive@OSU

Spatial Changes in Trawl Fishing Effort in Response to Footrope Diameter Restrictions in the U.S. West Coast Bottom Trawl Fishery

The influence of bait and stereo video on the performance of a video lander as a survey tool for marine demersal reef fishes in Oregon waters

Site Fidelity and Movement of Eight Species of Pacific Rockfish at a High-Relief Rocky Reef on the Oregon Coast

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

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

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

Evaluation of a Selective Flatfish Trawl and Diel Variation in Rockfish Catchability as Bycatch Reduction Tools in the Deepwater Complex Fishery off the U.S. West Coast

Near-Real-Time Acoustic Monitoring of Beaked Whales and Other Cetaceans Using a Seaglider (TM)

Buoyancy regulation and barotrauma in two species of nearshore rockfish

Discard Mortality of Trawl-Caught Lingcod in Relation to Tow Duration and Time on Deck

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