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• 2181. [Article] Review of Parasites Found to Cause Willamette Fish Deformities

  1 p. Review produced for HC 441: Science Colloquium: Willamette River Environmental Health, Robert D. Clark Honors College, University of Oregon, Spring term, 2004.

  Citation × Citation Citation Abstract Copy Title: Review of Parasites Found to Cause Willamette Fish Deformities Author: Miller, Jessica Adele, 1967-, Stauth, David Year: 2006, 2004 1 p. Review produced for HC 441: Science Colloquium: Willamette River Environmental Health, Robert D. Clark Honors College, University of Oregon, Spring term, 2004. Title: Review of Parasites Found to Cause Willamette Fish Deformities Author: Miller, Jessica Adele, 1967-, Stauth, David Year: 2006, 2004 1 p. Review produced for HC 441: Science Colloquium: Willamette River Environmental Health, Robert D. Clark Honors College, University of Oregon, Spring term, 2004. Close

• 2182. [Article] Interactions among Invasive Pacific Red Lionfish, Fish Parasites, and Cleaning Mutualisms Native to Atlantic Coral Reefs

  What makes invasive species successful, and how do they affect native populations and communities? I addressed these key questions in the context of the invasion of Atlantic coral reefs by Pacific red ...

  Citation × Citation Citation Abstract Copy Title: Interactions among Invasive Pacific Red Lionfish, Fish Parasites, and Cleaning Mutualisms Native to Atlantic Coral Reefs Author: Tuttle, Lillian J. What makes invasive species successful, and how do they affect native populations and communities? I addressed these key questions in the context of the invasion of Atlantic coral reefs by Pacific red lionfish (Pterois volitans). To assess the role of parasites in contributing to the success of this invasion, I compared infection rates of lionfish with syntopic carnivorous fishes at multiple locations in both the invasive and native ranges of lionfish. Invasive Atlantic lionfish had extremely few parasites when compared both to native Pacific lionfish and to ecologically similar native Atlantic reef fishes. Such “enemy release” may help to explain this successful invasion if lionfish consequently allocate more energy to growth and reproduction than to costly immune defenses. With few parasites limiting them, lionfish may consume ecologically important species, including Elacatinus spp. cleaning gobies: ubiquitous, conspicuous fishes that remove ectoparasites from other reef fishes. Although juvenile lionfish ate cleaner goby (E. genie) during laboratory experiments, they quickly learned to avoid them, likely due to a previously undescribed skin toxin in these gobies. Field experiments further revealed no change in the survival and growth rates of newly recruited cohorts of the cleaner goby in the presence vs. absence of lionfish. However, lionfish caused declines in the densities of the most abundant facultative cleaner, juvenile bluehead wrasse (Thalassoma bifasciatum), and of transient fishes that are often cleaned while visiting coral patch reefs. Therefore, lionfish do not have uniformly negative effects on native species; distasteful to potential predators, the cleaner goby is among the remarkably few small fish to escape predation by lionfish. The continued presence of Elacatinus spp. cleaning gobies, the predominant cleaners on invaded reefs, should limit cascading effects of lionfish on other Atlantic coral-reef inhabitants. Nonetheless, given their broad and voracious appetites, invasive lionfish will likely continue to affect native reef communities via predation on other cleaners and ecologically important fishes. Title: Interactions among Invasive Pacific Red Lionfish, Fish Parasites, and Cleaning Mutualisms Native to Atlantic Coral Reefs Author: Tuttle, Lillian J. What makes invasive species successful, and how do they affect native populations and communities? I addressed these key questions in the context of the invasion of Atlantic coral reefs by Pacific red lionfish (Pterois volitans). To assess the role of parasites in contributing to the success of this invasion, I compared infection rates of lionfish with syntopic carnivorous fishes at multiple locations in both the invasive and native ranges of lionfish. Invasive Atlantic lionfish had extremely few parasites when compared both to native Pacific lionfish and to ecologically similar native Atlantic reef fishes. Such “enemy release” may help to explain this successful invasion if lionfish consequently allocate more energy to growth and reproduction than to costly immune defenses. With few parasites limiting them, lionfish may consume ecologically important species, including Elacatinus spp. cleaning gobies: ubiquitous, conspicuous fishes that remove ectoparasites from other reef fishes. Although juvenile lionfish ate cleaner goby (E. genie) during laboratory experiments, they quickly learned to avoid them, likely due to a previously undescribed skin toxin in these gobies. Field experiments further revealed no change in the survival and growth rates of newly recruited cohorts of the cleaner goby in the presence vs. absence of lionfish. However, lionfish caused declines in the densities of the most abundant facultative cleaner, juvenile bluehead wrasse (Thalassoma bifasciatum), and of transient fishes that are often cleaned while visiting coral patch reefs. Therefore, lionfish do not have uniformly negative effects on native species; distasteful to potential predators, the cleaner goby is among the remarkably few small fish to escape predation by lionfish. The continued presence of Elacatinus spp. cleaning gobies, the predominant cleaners on invaded reefs, should limit cascading effects of lionfish on other Atlantic coral-reef inhabitants. Nonetheless, given their broad and voracious appetites, invasive lionfish will likely continue to affect native reef communities via predation on other cleaners and ecologically important fishes. Close

• 2183. [Article] Consolidation in Alaskan Ports after the Introduction of Fishing Property Rights

  ITQs increase fishery efficiency, but have been criticized for redistributing income away from small communities and increasing concentration in production. We empirically examine these effects in the ...

  Citation × Citation Citation Abstract Copy Title: Consolidation in Alaskan Ports after the Introduction of Fishing Property Rights Author: Edwards, Eric, Sutherland, Sara ITQs increase fishery efficiency, but have been criticized for redistributing income away from small communities and increasing concentration in production. We empirically examine these effects in the 1995 adoption of ITQs in the Alaskan halibut and sablefish fisheries. Fishing ports generally do not lose harvesting or processing revenue, but both processors and vessel owners consolidate, and fewer fish are delivered to the home port of the fisher. Small coastal cities see a reduced number of vessel owners and may experience overall population declines. Written and oral testimony suggests pre-adoption opposition may be increased when community residents foresee these changes. Title: Consolidation in Alaskan Ports after the Introduction of Fishing Property Rights Author: Edwards, Eric, Sutherland, Sara ITQs increase fishery efficiency, but have been criticized for redistributing income away from small communities and increasing concentration in production. We empirically examine these effects in the 1995 adoption of ITQs in the Alaskan halibut and sablefish fisheries. Fishing ports generally do not lose harvesting or processing revenue, but both processors and vessel owners consolidate, and fewer fish are delivered to the home port of the fisher. Small coastal cities see a reduced number of vessel owners and may experience overall population declines. Written and oral testimony suggests pre-adoption opposition may be increased when community residents foresee these changes. Close

• 2184. [Article] Bull Trout (Salvelinus confluentus) population and habitat surveys in the McKenzie and Middle Fork Willamette Basins, 2000

  DOE/BP-00004093-1

  Citation × Citation Citation Abstract Copy Title: Bull Trout (Salvelinus confluentus) population and habitat surveys in the McKenzie and Middle Fork Willamette Basins, 2000 Author: Taylor, Greg DOE/BP-00004093-1 Title: Bull Trout (Salvelinus confluentus) population and habitat surveys in the McKenzie and Middle Fork Willamette Basins, 2000 Author: Taylor, Greg DOE/BP-00004093-1 Close

• 2185. [Article] Infection and immune response induced by Vibrio anguillarum in juvenile coho salmon (Oncorhynchus kisutch)

  Immunity in juvenile coho salmon (Oncorhynchus kisutch) was evaluated after immunization against vibriosis by parenteral, oral or immersion methods. Relative levels of immunity were determined by protection ...

  Citation × Citation Citation Abstract Copy Title: Infection and immune response induced by Vibrio anguillarum in juvenile coho salmon (Oncorhynchus kisutch) Author: Groberg, Warren J. Immunity in juvenile coho salmon (Oncorhynchus kisutch) was evaluated after immunization against vibriosis by parenteral, oral or immersion methods. Relative levels of immunity were determined by protection of fish from experimental water-borne challenges with Vibrio anguillarum and by serum agglutination titers. Coho salmon eggs were exposed to bacterin during artificial spawning or as embryos 4-5 days before hatching. Two of the six injected embryos had agglutination titers 218 days later, and as juveniles these two fish demonstrated an anamnestic response following intraperitoneal injection of bacteria. Fish that had selected portions of their body immersed in bacteria had high levels of protection and lower agglutination titers when compared to those completely submerged in the same preparation. Results showed that parenterally immunized fish had high titers and a high level of protection, those immersed in the bacterin had lower titers but a high level of protection and those orally immunized had no serum agglutinins and only moderate protection. Previously unimmunized fish were significantly protected when passively immunized with coho salmon anti-V. anguillarum immunoglobulin partially purified by gel filtration. The agglutination titer of the partially purified antibody was 1:4. Serum or spleen cells obtained from orally immunized fish conferred no protection to fish injected with these substances. Serum from parenterally immunized fish, however, conferred a high level of protection in passively immunized fish and spleen cells from these same donors also provided moderate protection to previously nonimmune recipients. Coho salmon radiolabeled tetrameric immunoglobulin purified by ion exchange and gel filtration was effectively absorbed in the blood after it was intraperitoneally injected. The kinetics of absorption were related to water temperature with less immunoglobulin absorbed at the lower temperatures. Effects of temperature on infection were examined at seven water temperatures in 3°C increments from 3 to 21°C. The mean day to death and total mortality were related to temperature and a shorter mean day to death and higher mortality was observed at increased temperatures. The effect of temperature on the time of onset of agglutinating antibody formation in parenterally immunized fish was studied in fish held at 6, 12 and 18°C. Titers were first observed on days 10, 15 and 25 in fish held at 18, 12 and 6°C, respectively. Growth curves of V. anguillarum cultured in Brain Heart Infusion broth were determined at the same three temperatures with growth rates directly related to temperature. Title: Infection and immune response induced by Vibrio anguillarum in juvenile coho salmon (Oncorhynchus kisutch) Author: Groberg, Warren J. Immunity in juvenile coho salmon (Oncorhynchus kisutch) was evaluated after immunization against vibriosis by parenteral, oral or immersion methods. Relative levels of immunity were determined by protection of fish from experimental water-borne challenges with Vibrio anguillarum and by serum agglutination titers. Coho salmon eggs were exposed to bacterin during artificial spawning or as embryos 4-5 days before hatching. Two of the six injected embryos had agglutination titers 218 days later, and as juveniles these two fish demonstrated an anamnestic response following intraperitoneal injection of bacteria. Fish that had selected portions of their body immersed in bacteria had high levels of protection and lower agglutination titers when compared to those completely submerged in the same preparation. Results showed that parenterally immunized fish had high titers and a high level of protection, those immersed in the bacterin had lower titers but a high level of protection and those orally immunized had no serum agglutinins and only moderate protection. Previously unimmunized fish were significantly protected when passively immunized with coho salmon anti-V. anguillarum immunoglobulin partially purified by gel filtration. The agglutination titer of the partially purified antibody was 1:4. Serum or spleen cells obtained from orally immunized fish conferred no protection to fish injected with these substances. Serum from parenterally immunized fish, however, conferred a high level of protection in passively immunized fish and spleen cells from these same donors also provided moderate protection to previously nonimmune recipients. Coho salmon radiolabeled tetrameric immunoglobulin purified by ion exchange and gel filtration was effectively absorbed in the blood after it was intraperitoneally injected. The kinetics of absorption were related to water temperature with less immunoglobulin absorbed at the lower temperatures. Effects of temperature on infection were examined at seven water temperatures in 3°C increments from 3 to 21°C. The mean day to death and total mortality were related to temperature and a shorter mean day to death and higher mortality was observed at increased temperatures. The effect of temperature on the time of onset of agglutinating antibody formation in parenterally immunized fish was studied in fish held at 6, 12 and 18°C. Titers were first observed on days 10, 15 and 25 in fish held at 18, 12 and 6°C, respectively. Growth curves of V. anguillarum cultured in Brain Heart Infusion broth were determined at the same three temperatures with growth rates directly related to temperature. Close

• 2186. [Article] Management and Value Chain of Nile Tilapia Cultured in Ponds of Small-scale Farmers in Morogoro Region, Tanzania

  This is part of the IIFET Special Session on Markets and Value Chains for Small Aquaculture & Fisheries Enterprises with a Focus on Gender that took place on 17 July 2012 in Dar Es Salaam, Tanzania in ...

  Citation × Citation Citation Abstract Copy Title: Management and Value Chain of Nile Tilapia Cultured in Ponds of Small-scale Farmers in Morogoro Region, Tanzania Author: Mnembuka, Berno, Chenyambuga, Sebastian Wilson, Madalla, Nazael This is part of the IIFET Special Session on Markets and Value Chains for Small Aquaculture & Fisheries Enterprises with a Focus on Gender that took place on 17 July 2012 in Dar Es Salaam, Tanzania in conjunction with 16th IIFET Conference. The complete proceedings of this special session are available (http://aquafishcrsp.oregonstate.edu/Documents/Uploads/FileManager/IIFET%202012%20CRSP%20Session%20Proceedings%20Final_small.pdf) through the Aquaculture & Fisheries Collaborative Research Support Program gender web site, (http://aquafishcrsp.oregonstate.edu/Gender/). Title: Management and Value Chain of Nile Tilapia Cultured in Ponds of Small-scale Farmers in Morogoro Region, Tanzania Author: Mnembuka, Berno, Chenyambuga, Sebastian Wilson, Madalla, Nazael This is part of the IIFET Special Session on Markets and Value Chains for Small Aquaculture & Fisheries Enterprises with a Focus on Gender that took place on 17 July 2012 in Dar Es Salaam, Tanzania in conjunction with 16th IIFET Conference. The complete proceedings of this special session are available (http://aquafishcrsp.oregonstate.edu/Documents/Uploads/FileManager/IIFET%202012%20CRSP%20Session%20Proceedings%20Final_small.pdf) through the Aquaculture & Fisheries Collaborative Research Support Program gender web site, (http://aquafishcrsp.oregonstate.edu/Gender/). Close

• 2187. [Article] Poor rich-country industries: Fish-processing industries out-competed by low-labour-cost countries?

  The authors pose the following: "Is it possible for the remaining fish-processing industry in Norway to survive in the future?" They discuss the relative advantages of doing processing in 'rich' versus ...

  Citation × Citation Citation Abstract Copy Title: Poor rich-country industries: Fish-processing industries out-competed by low-labour-cost countries? Author: Iversen, Audun, Bendiksen, Bjørn-Inge The authors pose the following: "Is it possible for the remaining fish-processing industry in Norway to survive in the future?" They discuss the relative advantages of doing processing in 'rich' versus 'poor' countries. There are some location advantages for Norwegian fish processors, but these can be difficult to exploit. To truly understand the nuances of competition, it must be studied from various levels - country, firm and institution. Title: Poor rich-country industries: Fish-processing industries out-competed by low-labour-cost countries? Author: Iversen, Audun, Bendiksen, Bjørn-Inge The authors pose the following: "Is it possible for the remaining fish-processing industry in Norway to survive in the future?" They discuss the relative advantages of doing processing in 'rich' versus 'poor' countries. There are some location advantages for Norwegian fish processors, but these can be difficult to exploit. To truly understand the nuances of competition, it must be studied from various levels - country, firm and institution. Close

• 2188. [Article] Behavior and Ecological Effects of Invasive Lionfish on Atlantic Coral Reefs and Seagrass Beds

  Citation × Citation Citation Abstract Copy Title: Behavior and Ecological Effects of Invasive Lionfish on Atlantic Coral Reefs and Seagrass Beds Author: Benkwitt, Cassandra E. Title: Behavior and Ecological Effects of Invasive Lionfish on Atlantic Coral Reefs and Seagrass Beds Author: Benkwitt, Cassandra E. Close

• 2189. [Article] Coast Range Subbasin Fish Management Plan

  Citation × Citation Citation Abstract Copy Title: Coast Range Subbasin Fish Management Plan Author: Mamoyac, Steve, Wevers, Mary Jo, Oregon. Department of Fish and Wildlife, Haxton, John C., Nemeth, Doug Title: Coast Range Subbasin Fish Management Plan Author: Mamoyac, Steve, Wevers, Mary Jo, Oregon. Department of Fish and Wildlife, Haxton, John C., Nemeth, Doug Close

• 2190. [Article] Main stem Willamette subbasin fish management plan

  Citation × Citation Citation Abstract Copy Title: Main stem Willamette subbasin fish management plan Author: Rien, Tom, Wade, Mark G., Wevers, Mary Jo, Oregon. Department of Fish and Wildlife, Haxton, John C., Wetherbee, Joe, Massey, Jay Title: Main stem Willamette subbasin fish management plan Author: Rien, Tom, Wade, Mark G., Wevers, Mary Jo, Oregon. Department of Fish and Wildlife, Haxton, John C., Wetherbee, Joe, Massey, Jay Close