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• 61. [Article] Effects of Hypoxia on Survival and Growth of Barnacle Larvae Off the Oregon Coast

  In recent years off the United States Oregon coast severe hypoxic events have resulted in areas of mass vertebrate and invertebrate species mortality known as dead zones. Creation of dead zones and alteration ...

  Citation × Citation Citation Abstract Copy Title: Effects of Hypoxia on Survival and Growth of Barnacle Larvae Off the Oregon Coast Author: Amstutz, Amanda C. In recent years off the United States Oregon coast severe hypoxic events have resulted in areas of mass vertebrate and invertebrate species mortality known as dead zones. Creation of dead zones and alteration of community species composition in response to inner shelf hypoxic conditions have been observed annually from 2002 to 2007. Near shore hypoxic events have already begun to redefine ecosystems off the Oregon Coast and other areas in the California Current Large Marine Ecosystem (CCLME). Barnacle species are of great importance in these communities. As a part of the life history of the barnacle, successful growth and survival of larval stages is essential to the success of sessile adults. We carried out experiments at Oregon State University's Hatfield Marine Science Center to determine the rate of nauplii (larvae) mortality in the barnacle species Balanus glandula at increasingly severe levels of hypoxia. We also investigated the effects of exposure to hypoxic conditions on B. glandula larval development. We found no difference in nauplii survival or development between exposure to normoxic (5.5 mg/L dissolved oxygen) and microxic (0.5 mg/L dissolved oxygen) conditions for 24 hours. Title: Effects of Hypoxia on Survival and Growth of Barnacle Larvae Off the Oregon Coast Author: Amstutz, Amanda C. In recent years off the United States Oregon coast severe hypoxic events have resulted in areas of mass vertebrate and invertebrate species mortality known as dead zones. Creation of dead zones and alteration of community species composition in response to inner shelf hypoxic conditions have been observed annually from 2002 to 2007. Near shore hypoxic events have already begun to redefine ecosystems off the Oregon Coast and other areas in the California Current Large Marine Ecosystem (CCLME). Barnacle species are of great importance in these communities. As a part of the life history of the barnacle, successful growth and survival of larval stages is essential to the success of sessile adults. We carried out experiments at Oregon State University's Hatfield Marine Science Center to determine the rate of nauplii (larvae) mortality in the barnacle species Balanus glandula at increasingly severe levels of hypoxia. We also investigated the effects of exposure to hypoxic conditions on B. glandula larval development. We found no difference in nauplii survival or development between exposure to normoxic (5.5 mg/L dissolved oxygen) and microxic (0.5 mg/L dissolved oxygen) conditions for 24 hours. Close

• 62. [Article] The Energetic Implications Of Fisheries Processing Waste And Potential Fishmeal/Fishoil By-Products

  The seafood industry in Alaska produces about 4.4 billion pounds of fish every year and approximately 2.2 billion pounds of fish waste. Product recovery rates in the seafood industry have increased in ...

  Citation × Citation Citation Abstract Copy Title: The Energetic Implications Of Fisheries Processing Waste And Potential Fishmeal/Fishoil By-Products Author: Ichien, Stephanie The seafood industry in Alaska produces about 4.4 billion pounds of fish every year and approximately 2.2 billion pounds of fish waste. Product recovery rates in the seafood industry have increased in the last decade, but still a large portion of all harvested fish is unused and often discharged into coastal and oceanic waters. With a move toward ecosystem-based fisheries management and the minimization of environmental impacts, several agencies and organizations are working to better utilize by-product development to enhance efficiency in the industry. However, research suggests that the discharge of fish waste may have some beneficial ecological impacts by providing a readily available source of protein to scavenging predators, such as seabirds. This project investigates the production of fishmeal/fishoil by-product from fish waste and the energetic implications involved with the allocation of energy between marine ecosystem and the economic system. We apply a series of analysis tools to assess these tradeoffs using energy as a means to frame the positive and negative impacts of seafood waste in a case study of the Alaska Pollock Fishery. Title: The Energetic Implications Of Fisheries Processing Waste And Potential Fishmeal/Fishoil By-Products Author: Ichien, Stephanie The seafood industry in Alaska produces about 4.4 billion pounds of fish every year and approximately 2.2 billion pounds of fish waste. Product recovery rates in the seafood industry have increased in the last decade, but still a large portion of all harvested fish is unused and often discharged into coastal and oceanic waters. With a move toward ecosystem-based fisheries management and the minimization of environmental impacts, several agencies and organizations are working to better utilize by-product development to enhance efficiency in the industry. However, research suggests that the discharge of fish waste may have some beneficial ecological impacts by providing a readily available source of protein to scavenging predators, such as seabirds. This project investigates the production of fishmeal/fishoil by-product from fish waste and the energetic implications involved with the allocation of energy between marine ecosystem and the economic system. We apply a series of analysis tools to assess these tradeoffs using energy as a means to frame the positive and negative impacts of seafood waste in a case study of the Alaska Pollock Fishery. Close

• 63. [Article] Including Human Dimensions in Integrated Marine Ecosystem Models: Australian examples

  Abstract Only

  Citation × Citation Citation Abstract Copy Title: Including Human Dimensions in Integrated Marine Ecosystem Models: Australian examples Author: Thebaud, Olivier, Little, Rich, van Putten, Ingrid, Fulton, Beth, Hutton, Trevor, Pascoe, Sean, Innes, James Abstract Only Title: Including Human Dimensions in Integrated Marine Ecosystem Models: Australian examples Author: Thebaud, Olivier, Little, Rich, van Putten, Ingrid, Fulton, Beth, Hutton, Trevor, Pascoe, Sean, Innes, James Abstract Only Close

• 64. [Article] The Relationship between Climate Change, Sardine Abundance and Commercial Fisheries Production in the California Current Large Marine Ecosystem

  Abstract Only

  Citation × Citation Citation Abstract Copy Title: The Relationship between Climate Change, Sardine Abundance and Commercial Fisheries Production in the California Current Large Marine Ecosystem Author: Hotte, Ngaio, Herrick, Sam, Norton, Jerrold Abstract Only Title: The Relationship between Climate Change, Sardine Abundance and Commercial Fisheries Production in the California Current Large Marine Ecosystem Author: Hotte, Ngaio, Herrick, Sam, Norton, Jerrold Abstract Only Close

• 65. [Article] The Relationship between Climate Change, Sardine Abundance and Commercial Fisheries Production in the California Current Large Marine Ecosystem

  Abstract Only

  Citation × Citation Citation Abstract Copy Title: The Relationship between Climate Change, Sardine Abundance and Commercial Fisheries Production in the California Current Large Marine Ecosystem Author: Hotte, Ngaio, Herrick, Sam, Norton, Jerrold Abstract Only Title: The Relationship between Climate Change, Sardine Abundance and Commercial Fisheries Production in the California Current Large Marine Ecosystem Author: Hotte, Ngaio, Herrick, Sam, Norton, Jerrold Abstract Only Close

• 66. [Article] Constancy and change in marine predator diets across a shift in oceanographic conditions in the Northern California Current

  To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Springer ...

  Citation × Citation Citation Abstract Copy Title: Constancy and change in marine predator diets across a shift in oceanographic conditions in the Northern California Current Author: Filliger, Laura Z., Suryan, Robert M., Gladics, Amanda J., Segui, Leah M., Brodeur, Richard D. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Springer and can be found at: http://link.springer.com/journal/227. Title: Constancy and change in marine predator diets across a shift in oceanographic conditions in the Northern California Current Author: Filliger, Laura Z., Suryan, Robert M., Gladics, Amanda J., Segui, Leah M., Brodeur, Richard D. To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Springer and can be found at: http://link.springer.com/journal/227. Close

• 67. [Article] The Effect of the Environment on California's Commercial Fisheries

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: The Effect of the Environment on California's Commercial Fisheries Author: Norton, Jerrold, Herrick, Samuel Jr Abstract only. Title: The Effect of the Environment on California's Commercial Fisheries Author: Norton, Jerrold, Herrick, Samuel Jr Abstract only. Close

• 68. [Article] Marine conservation in Latin America and the Caribbean : an analysis of marine protected areas (MPAs)

  Coastal and marine ecosystems in Latin America and the Caribbean are undergoing a rapid and drastic transformation. Dense human populations are concentrated in coastal areas, leading to increased coastal ...

  Citation × Citation Citation Abstract Copy Title: Marine conservation in Latin America and the Caribbean : an analysis of marine protected areas (MPAs) Author: Guarderas, A. Paulina Coastal and marine ecosystems in Latin America and the Caribbean are undergoing a rapid and drastic transformation. Dense human populations are concentrated in coastal areas, leading to increased coastal development, destruction of near-shore habitats, pollution, and overexploitation of marine resources. For most Latin American and Caribbean countries, the deterioration of coastal ecosystems is particularly critical due to the strong dependency of their economies on the quality of natural resources and ecosystems. Thus, the necessity of effectively conserving and managing marine ecosystems with a more integrative, ecosystem–based approach is urgent. Marine reserves constitute a powerful conservation tool for mitigating ocean degradation. Because they provide spatial refuges for fished populations, and protect important habitats and their associated ecological interactions, they are particularly beneficial for counteracting the harmful effects of overfishing. In Chapter 2 of this thesis, I present a comprehensive analysis of the status and progress of marine protected areas (MPAs), particularly no-take marine reserves in Latin America and the Caribbean. I also show that the number and area protected have increased through time, particularly since the 1980s; but the system of MPAs is still deficient in fully representing the whole array of marine biogeographic provinces. In addition, I demonstrate that no-take marine reserves are poorly utilized for conservation of marine biodiversity in this region. Finally, I highlight the need for strengthening the marine conservation initiative in Latin America and the Caribbean under a regional approach. In Chapter 3 using meta-analytic methods, I quantitatively estimate the magnitude of the conservation effects of marine reserves in Latin America and the Caribbean. I examine the species and reserve characteristics that contribute to explain the variation in responses to protection. These analyses demonstrate positive outcomes of reserve protection at assemblage and species levels, and confirm the effectiveness of marine reserves as a conservation tool to rebuild exploited populations. Less clear is the relationship between density responses to protection and species-specific characteristics. Species with different trophic levels, adult mobility, body size and resilience can benefit from protection. Nevertheless, when I examine the effects of protection on one habitat type (coral reefs) using biomass as the response variable different trophic groups show differential responses. Predators demonstrated higher positive responses compared to herbivores or producers. In addition some indirect effects were disclosed. Findings from this research have direct implications for the advancement of marine conservation in Latin America and the Caribbean. Chapter 2 provides an important tool for planning marine conservation strategies at a regional scale. Areas that need more protection are highlighted, especially networks of no-take marine reserves in the Eastern Pacific and Southern Atlantic. Additionally, this assessment can be used as a baseline to make future comparisons of the progress of marine biodiversity conservation in this region. Chapter 3 demonstrates the powerful effect of no-take marine reserves in restoring depleted populations and in some cases recovering ecological functions that have been lost due to overfishing in Latin American and the Caribbean. Title: Marine conservation in Latin America and the Caribbean : an analysis of marine protected areas (MPAs) Author: Guarderas, A. Paulina Coastal and marine ecosystems in Latin America and the Caribbean are undergoing a rapid and drastic transformation. Dense human populations are concentrated in coastal areas, leading to increased coastal development, destruction of near-shore habitats, pollution, and overexploitation of marine resources. For most Latin American and Caribbean countries, the deterioration of coastal ecosystems is particularly critical due to the strong dependency of their economies on the quality of natural resources and ecosystems. Thus, the necessity of effectively conserving and managing marine ecosystems with a more integrative, ecosystem–based approach is urgent. Marine reserves constitute a powerful conservation tool for mitigating ocean degradation. Because they provide spatial refuges for fished populations, and protect important habitats and their associated ecological interactions, they are particularly beneficial for counteracting the harmful effects of overfishing. In Chapter 2 of this thesis, I present a comprehensive analysis of the status and progress of marine protected areas (MPAs), particularly no-take marine reserves in Latin America and the Caribbean. I also show that the number and area protected have increased through time, particularly since the 1980s; but the system of MPAs is still deficient in fully representing the whole array of marine biogeographic provinces. In addition, I demonstrate that no-take marine reserves are poorly utilized for conservation of marine biodiversity in this region. Finally, I highlight the need for strengthening the marine conservation initiative in Latin America and the Caribbean under a regional approach. In Chapter 3 using meta-analytic methods, I quantitatively estimate the magnitude of the conservation effects of marine reserves in Latin America and the Caribbean. I examine the species and reserve characteristics that contribute to explain the variation in responses to protection. These analyses demonstrate positive outcomes of reserve protection at assemblage and species levels, and confirm the effectiveness of marine reserves as a conservation tool to rebuild exploited populations. Less clear is the relationship between density responses to protection and species-specific characteristics. Species with different trophic levels, adult mobility, body size and resilience can benefit from protection. Nevertheless, when I examine the effects of protection on one habitat type (coral reefs) using biomass as the response variable different trophic groups show differential responses. Predators demonstrated higher positive responses compared to herbivores or producers. In addition some indirect effects were disclosed. Findings from this research have direct implications for the advancement of marine conservation in Latin America and the Caribbean. Chapter 2 provides an important tool for planning marine conservation strategies at a regional scale. Areas that need more protection are highlighted, especially networks of no-take marine reserves in the Eastern Pacific and Southern Atlantic. Additionally, this assessment can be used as a baseline to make future comparisons of the progress of marine biodiversity conservation in this region. Chapter 3 demonstrates the powerful effect of no-take marine reserves in restoring depleted populations and in some cases recovering ecological functions that have been lost due to overfishing in Latin American and the Caribbean. Close

• 69. [Article] Ultrasonic Bone Assessment in Tursiops Truncatus: A Proposed Means for Monitoring Marine Ecosystem Health

  In order to circumvent limitations in traditional radiographic bone density assessment, a custom quantitative ultrasound device and protocols were developed for assessment of live bottlenose dolphins, ...

  Citation × Citation Citation Abstract Copy Title: Ultrasonic Bone Assessment in Tursiops Truncatus: A Proposed Means for Monitoring Marine Ecosystem Health Author: Powell, James, Luo, Gangming, Kaufman, Jonathan J. Year: 2015 In order to circumvent limitations in traditional radiographic bone density assessment, a custom quantitative ultrasound device and protocols were developed for assessment of live bottlenose dolphins, Tursiops truncatus. In laboratory measurements on disarticulated pectoral flippers collected post-mortem, a strong correlation was established between bone mineral density (BMD) as measured with quantitative ultrasound and X-ray (r=0.93). A primary target skeletal site in the radius of the dolphin pectoral fin was comprehensively defined. BMD distribution patterns throughout the radius were characterized and a single region of interest (ROI) with a high correlation to the density of the overall bone (r=0.98) was selected. Statistical tests demonstrated no statistically significant differences in any subset based on sex, age, total body length, handedness, nutritional status, or geographical affinity, supporting inclusion of all specimens as a normative reference dataset for bone density in bottlenose dolphins. Initial trials to develop clinical protocols and establish ultrasound of bone as truly non-invasive were conducted on captive dolphins. Successful assessments were subsequently conducted to ultrasonically assess BMD in wild dolphins during capture-release health assessments. Title: Ultrasonic Bone Assessment in Tursiops Truncatus: A Proposed Means for Monitoring Marine Ecosystem Health Author: Powell, James, Luo, Gangming, Kaufman, Jonathan J. Year: 2015 In order to circumvent limitations in traditional radiographic bone density assessment, a custom quantitative ultrasound device and protocols were developed for assessment of live bottlenose dolphins, Tursiops truncatus. In laboratory measurements on disarticulated pectoral flippers collected post-mortem, a strong correlation was established between bone mineral density (BMD) as measured with quantitative ultrasound and X-ray (r=0.93). A primary target skeletal site in the radius of the dolphin pectoral fin was comprehensively defined. BMD distribution patterns throughout the radius were characterized and a single region of interest (ROI) with a high correlation to the density of the overall bone (r=0.98) was selected. Statistical tests demonstrated no statistically significant differences in any subset based on sex, age, total body length, handedness, nutritional status, or geographical affinity, supporting inclusion of all specimens as a normative reference dataset for bone density in bottlenose dolphins. Initial trials to develop clinical protocols and establish ultrasound of bone as truly non-invasive were conducted on captive dolphins. Successful assessments were subsequently conducted to ultrasonically assess BMD in wild dolphins during capture-release health assessments. Close

• 70. [Article] Nitrogen and iron interactions in filamentous cyanobacteria

  The investigations described in this paper are an attempt to further define and quantify the interrelationship of nitrogen fixation and iron nutritional physiology in these two species. Chapter II will ...

  Citation × Citation Citation Abstract Copy Title: Nitrogen and iron interactions in filamentous cyanobacteria Author: Hutchins, David Allen Year: 1989 The investigations described in this paper are an attempt to further define and quantify the interrelationship of nitrogen fixation and iron nutritional physiology in these two species. Chapter II will present and compare data on nutritional ratios of field collected Trichodesmium colonies and laboratory Anabaena cultures, with the intent of examining possible correlations between observed iron levels and protein nitrogen and chlorophyll concentrations, as well as nitrogen fixation rates. Chapter Ill is an examination of nitrogen fixation and siderophore production in Anabaena with emphasis on the possible implications of hypothesized synergistic effects of these two physiological capabilities on cyanobacterial dominance and bloom formation. Chapter IV will deal with the possibility of gratuitous manganese repression of Anabaena siderophore production in the manner described by Hantke (1987) for regulation of siderophore production in E. coli. The Conclusions chapter (Chapter V) will present a discussion of the results of these experiments in the context of current problems in cyanobacterial physiology, ecology and evolution. It is hoped that a significant contribution can be made to our understanding of the related problems of cyanobacterial dominance in freshwater ecosysytems and the scarcity of cyanobacterial nitrogen fixation in marine ecosystems. Title: Nitrogen and iron interactions in filamentous cyanobacteria Author: Hutchins, David Allen Year: 1989 The investigations described in this paper are an attempt to further define and quantify the interrelationship of nitrogen fixation and iron nutritional physiology in these two species. Chapter II will present and compare data on nutritional ratios of field collected Trichodesmium colonies and laboratory Anabaena cultures, with the intent of examining possible correlations between observed iron levels and protein nitrogen and chlorophyll concentrations, as well as nitrogen fixation rates. Chapter Ill is an examination of nitrogen fixation and siderophore production in Anabaena with emphasis on the possible implications of hypothesized synergistic effects of these two physiological capabilities on cyanobacterial dominance and bloom formation. Chapter IV will deal with the possibility of gratuitous manganese repression of Anabaena siderophore production in the manner described by Hantke (1987) for regulation of siderophore production in E. coli. The Conclusions chapter (Chapter V) will present a discussion of the results of these experiments in the context of current problems in cyanobacterial physiology, ecology and evolution. It is hoped that a significant contribution can be made to our understanding of the related problems of cyanobacterial dominance in freshwater ecosysytems and the scarcity of cyanobacterial nitrogen fixation in marine ecosystems. Close