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Articles 1 - 30 of 584
Full-Text Articles in Natural Resources Management and Policy
Ecology And Conservation Of Diamondback Terrapins In Virginia, Cypress Ambrose
Ecology And Conservation Of Diamondback Terrapins In Virginia, Cypress Ambrose
Undergraduate Honors Theses
The diamondback terrapin (Malaclemys terrapin) is the only turtle species native to North America with specific morphological and physiological adaptations to estuarine environments. Along with many other pressures contributing to population declines, terrapins frequently become trapped and drown as bycatch in crab pots used in the commercial and recreational blue crab (Callinectes sapidus) fishery. A wealth of evidence supports the use of inexpensive bycatch reduction devices (BRDs) that can be attached to the entrances of these traps, which leads to a marked decrease in terrapin bycatch while not reducing crab catch dramatically. Virginia is the only …
Understanding Avidities Of Recreational Activities For People Possessing Fishing Licenses And Residing In Urban Environments, Kyle F. Hansen
Understanding Avidities Of Recreational Activities For People Possessing Fishing Licenses And Residing In Urban Environments, Kyle F. Hansen
School of Natural Resources: Dissertations, Theses, and Student Research
Recreational fishing is one of the world's most popular pastimes, wherein participation is associated with sociodemographic factors. Even so, fishing license sales are declining in the USA in conjunction with a reduction in rural populations as people move to urban areas. Thus, urban areas are constantly growing in population size, population diversity, and geographic size suggesting a need to understand fishing participation in these growing areas. Natural resource managers often use participation to understand recreationists, yet avidity could provide a new way to understand recreationists. The goal of our study is to understand what sociodemographic factors influence the fishing avidity …
Wabanaki Experiences And Perspectives On “Our Shared Ocean”: Maine Indian Tribal-State Commission Special Report Sea Run, Anthony W. Sutton, Judson Esty-Kendall, Paul Thibeault
Wabanaki Experiences And Perspectives On “Our Shared Ocean”: Maine Indian Tribal-State Commission Special Report Sea Run, Anthony W. Sutton, Judson Esty-Kendall, Paul Thibeault
Maine Policy Review
The Maine Indian State Tribal Commission (MITSC) recently published a special report titled, Sea Run, documenting the impact of Colonial and Maine policies and activities on the quality and quantity of tribal fisheries spanning the time from first contact between Europeans and the Wabanaki Nations to today.
A Description Of The Grassland Communities Of The Wildcat Hills Region Of Northwestern Nebraska Including Scotts Bluff National Monument And Rare Plant Survey Of The Wildcat Hills Region Of Northwestern Nebraska, Volume I, Terri Hildebrand, Steven B. Rolfsmeier
A Description Of The Grassland Communities Of The Wildcat Hills Region Of Northwestern Nebraska Including Scotts Bluff National Monument And Rare Plant Survey Of The Wildcat Hills Region Of Northwestern Nebraska, Volume I, Terri Hildebrand, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This study resulted from a Cooperative Agreement between Nebraska Game and Parks Commission and the National Park Service (NPS), with funding provided by the Natural Resource Preservation Program of the NPS. Scotts Bluff National Monument was seeking to characterize the native grassland communities of the Wildcat Hills region in order to develop species composition models for prairie restoration of disturbed lands at the monument. Nebraska Game and Parks Commission needed similar information to refine community classification for the Wildcat Hills region, and to update rare plant species inventories. This report includes a description of the grassland communities and a rare …
A Description Of The Grassland Communities Of The Wildcat Hills Region Of Northwestern Nebraska Including Scotts Bluff National Monument And Rare Plant Survey Of The Wildcat Hills Region Of Northwestern Nebraska, Volume Ii, Terri Hildebrand, Steven B. Rolfsmeier
A Description Of The Grassland Communities Of The Wildcat Hills Region Of Northwestern Nebraska Including Scotts Bluff National Monument And Rare Plant Survey Of The Wildcat Hills Region Of Northwestern Nebraska, Volume Ii, Terri Hildebrand, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This study resulted from a Cooperative Agreement between Nebraska Game and Parks Commission and the National Park Service (NPS), with funding provided by the Natural Resource Preservation Program of the NPS. Scotts Bluff National Monument was seeking to characterize the native grassland communities of the Wildcat Hills region in order to develop species composition models for prairie restoration of disturbed lands at the monument. Nebraska Game and Parks Commission needed similar information to refine community classification for the Wildcat Hills region, and to update rare plant species inventories. This report includes a description of the grassland communities and a rare …
Vegetative Sampling Of The Wildcat Hills Region Of Northwestern Nebraska Including Scotts Bluff National Monument And Rare Plant Survey Of The Wildcat Hills Region Of Northwestern Nebraska, A Final Report To: Nebraska Game And Parks Commission, Terri Hildebrand, Steven B. Rolfsmeier
Vegetative Sampling Of The Wildcat Hills Region Of Northwestern Nebraska Including Scotts Bluff National Monument And Rare Plant Survey Of The Wildcat Hills Region Of Northwestern Nebraska, A Final Report To: Nebraska Game And Parks Commission, Terri Hildebrand, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
The Wildcat Hills region of northwestern Nebraska is a ridge extending westerly from Chimney Rock in Morrill county to west of Kiowa Creek in central Scotts Bluff county and southerly into the northernmost portions of Banner county (Fig. 1). Much of the expanse is fronted along its northern portion by the North Platte River and US Highway 26. Also included within the study area are the federal lands of Scotts Bluff National Monument and Chimney Rock National Historic Site. Two large portions of state lands, Wildcat Hills State Recreation Area and Buffalo Creek Wildlife Management Area, are located just easterly …
Freshwater And Saline Flood Plain Wetlands Of The North Platte River - Sources And Seasonal Dynamics: Kiowa Wildlife Management Area, Morrill, Ne, Anne M. Matherne
Freshwater And Saline Flood Plain Wetlands Of The North Platte River - Sources And Seasonal Dynamics: Kiowa Wildlife Management Area, Morrill, Ne, Anne M. Matherne
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
The Kiowa Wildlife Management Area (WMA), a 1 mi² wetland and upland on the North Platte River, was acquired by the Nebraska Game and Parks Commission (NGPC) in 1993. The WMA comprises two distinct wetland types, alkaline and freshwater, both of which provide important wildlife habitat. It was the goal of this project to understand the hydrology controlling the development and maintenance of these wetlands in order to anticipate the affect of management strategies on the wetland complex. The study was designed to develop a comprehensive picture of the hydrogeology of both the fresh and alkaline portions of the WMA, …
Willa Cather Ecological Prairie: An Ecological Overview, Harold G. Nagel
Willa Cather Ecological Prairie: An Ecological Overview, Harold G. Nagel
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This report includes data gathered on the ecology of a 610 acre mixed grass prairie in south-central Nebraska over a two year period.
An attempt was made to identify as many of the plant and animal species present and to determine density and standing crop biomass wherever possible, under the time and financial constraints present. Few attempts have been made to develop complete species checklists for both animals and plants in prairies. The data collected are considered baseline conditions against which comparisons can be made after a management plan is carried out.
This study of Cather Prairie had several objectives. …
The Flora Of The Oak-Wooded Drainages At The Timber Point Area, Southeastern Butler County, Nebraska, Steven B. Rolfsmeier
The Flora Of The Oak-Wooded Drainages At The Timber Point Area, Southeastern Butler County, Nebraska, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
The Timber Point Area is a 160-acre recreational/wildlife area occupying to S½ of the SW¼ sec. 22 and the adjacent N½ of the NW¼ sec. 27, T14N R4E. The area is located in the loess-mantled glacial-till hills of southeast Nebraska not far from the terminal moraine of the Pre-Illinoian glacial sheet, one mile south and two miles east of the present town of Brainard. The uplands at Timber Point were apparently in pasture prior to purchase by the NRD, with some cultivated fields occupying the lower ground along a stream valley which southwest to northeast through the property. This small …
The Flora Of Two Oak Drainages At The Red Cedar Area, Southwestern Saunders County, Nebraska, Steven B. Rolfsmeier
The Flora Of Two Oak Drainages At The Red Cedar Area, Southwestern Saunders County, Nebraska, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
The Red Cedar Area is a 175 acre recreational/wildlife area occupying the SE¼ sec. 20, T14N R5E and a small portion of sec. 29 directly to the south. The area is located in the glacial-till hills of southeast Nebraska ca 5 mi. north and 2 mi. west of Valpraiso. The bulk of the area was cultivated farmland prior to purchase by the NRD, and nearly all upland areas here were cultivated cropland, save for some steep oak-wooded drainages on the east side of Hunter’s Slough, which ran northwest to southeast through the property. The creek was dammed after NRD purchase …
The Vascular Plants Of The Woodlands Of South Table Creek In The Vicinity Of The National Arbor Day Center, Nebraska City, Nebraska, Steven B. Rolfsmeier
The Vascular Plants Of The Woodlands Of South Table Creek In The Vicinity Of The National Arbor Day Center, Nebraska City, Nebraska, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
The objective of this study is to describe the composition of the vascular plant flora of a three-quarter mile stretch of woodland along South Table Creek managed by the National Arbor Day Foundation in Nebraska City. This 50-60 acre woodland is representative of the many small tributaries of the Missouri River in southeastern Nebraska, and may represent the only natural “preserve” of native forest on the west side of the Missouri River between Fontenelle Forest and Indian Cave State Park. All naturally-occurring species encountered in this study are listed alphabetically by family at the end of this paper, and a …
The Flora Of Meadowlark Prairie, Northeastern Seward County, Nebraska, Steven B. Rolfsmeier
The Flora Of Meadowlark Prairie, Northeastern Seward County, Nebraska, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This report is on the flora of the Meadowlark Prairie. The prairie is an approximately 7 acre remnant of virgin tall-grass prairie in extreme northeastern Seward County, Nebraska. The remnant is triangular in shape and lies on a gentle southeast-facing slope with a total relief of 50 ft., along the east boundary of the Meadowlark Recreation Area. The prairie is surrounded on the east side by a small brome-infested prairie remnant and cultivated field off the NRD property, and on the remaining sides by formerly cultivated fields now seeded to native warm-season grasses. Soils in the area are primarily derived …
The Flora And Plant Communities Of The Ceresco Saline Basins, Southern Saunders County, Nebraska, Steven B. Rolfsmeier
The Flora And Plant Communities Of The Ceresco Saline Basins, Southern Saunders County, Nebraska, Steven B. Rolfsmeier
Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts
This report is on the flora and plant communities of the Ceresco Saline Basins. The basins are along Rock Creek east of Ceresco and represent the northernmost representatives of the “eastern saline marsh” community in Nebraska. Eastern saline marshland is mostly restricted to the Salt Creek drainage in northern and central Lancaster County, though the Ceresco basins extend a mile or more north into Saunders County in the floodplain of Rock Creek. Some of the wetland in this area is currently under management of the Nebraska Game and Parks Commission, while some of the northernmost portions of the basins are …
Optimizing Strategies To Hydraulically Plant Atlantic Salmon Eggs Based On Fry Dispersal Patterns, Ernest J. Atkinson
Optimizing Strategies To Hydraulically Plant Atlantic Salmon Eggs Based On Fry Dispersal Patterns, Ernest J. Atkinson
Electronic Theses and Dissertations
The Gulf of Maine Distinct Population Segment of Atlantic Salmon has suffered from habitat loss and exploitation over the last century. Hatchery supplementation has prevented the extirpation of the species, but stocking methods represent tradeoffs between survival, domestication, and logistics. Egg planting, the use of eyed embryos, maximizes natural rearing opportunities which can be important for adaptation. This method, however, is logistically demanding and requires significant labor over large spatial, but short temporal, scales dictated by the ontogeny of the fish. However, the survival and dispersal behavior of Atlantic Salmon fry immediately after emergence from eggs planted in artificial nests …
Silver Carp Hypophthalmichthys Molitrix Movements In The Lower Cumberland And Lower Tennessee River, Miranda Belanger
Silver Carp Hypophthalmichthys Molitrix Movements In The Lower Cumberland And Lower Tennessee River, Miranda Belanger
Scholars Week
Silver Carp Hypophthalmichthys molitrix are an invasive species making up a large portion of the fish biomass in the lower portions of the Tennessee River and the Cumberland River. This species is expanding its range throughout the upper portions of these rivers, beginning with Kentucky Lake and Lake Barkley. Silver Carp rarely spawn in Kentucky Lake and Lake Barkley, but they can enter these reservoirs through the lock chamber. Thus, the bottleneck created by lock chambers can be used to control expansion of invasive Silver Carp. Although Silver Carp movement patterns have been studied in other portions of the Tennessee …
Evaluating Benthic Macroinvertebrate Populations In Response To Scouring Events In The Trinity River, Ca, Liam Hay, Michael W. O'Neil, Chloe Pieper-Wasem
Evaluating Benthic Macroinvertebrate Populations In Response To Scouring Events In The Trinity River, Ca, Liam Hay, Michael W. O'Neil, Chloe Pieper-Wasem
Environmental Science & Management Senior Capstones
River systems across California have been impacted by appurtenant structures such as dams and diversions. These structures have had an adverse impact on Benthic invertebrate (BMI) communities by regulating river systems and changing the natural hydraulic pulses that follow seasonal precipitation. Benthic invertebrates are a critical food resource for salmonids and serve as an indicator of ecosystem health. Our study was interested in seeing the effects of scouring events on BMI in the Trinity River of Trinity County, C.A. Following a large precipitation event that occurred in the region in December 2022, an influx of water entered the river through …
River Report. State Of Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, Contaminants, 2023, Environmental Protection Board, Jacksonville Florida, University Of North Florida, Jacksonville University, Gerry Pinto, Brian P. Zoellner, Christopher Baynard, Gretchen Bielmyer-Fraser, Dale Casamatta, Charles Closmann, Nisse Goldberg, Ashley Johnson, Scott Jones, William Penwell, Radha Pyati, Adam Rosenblatt
River Report. State Of Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, Contaminants, 2023, Environmental Protection Board, Jacksonville Florida, University Of North Florida, Jacksonville University, Gerry Pinto, Brian P. Zoellner, Christopher Baynard, Gretchen Bielmyer-Fraser, Dale Casamatta, Charles Closmann, Nisse Goldberg, Ashley Johnson, Scott Jones, William Penwell, Radha Pyati, Adam Rosenblatt
State of the River Report
No abstract provided.
Walleye Feeding, Movements, And Energetics Reveal The Importance Of Connected Wetlands In Glacial Lakes, Logan M. Cutler
Walleye Feeding, Movements, And Energetics Reveal The Importance Of Connected Wetlands In Glacial Lakes, Logan M. Cutler
Electronic Theses and Dissertations
Fish require a variety of resources including prey, thermal refugia, and different physical habitat characteristics to grow and reproduce. All necessary resources are rarely provided by a single habitat, resulting in tradeoffs between occupying different habitats; therefore, the ability to move among heterogenous habitats is critical. These tradeoffs may occur in lakes with connected wetlands where the main lake habitats tend to be more thermally stable, but wetlands often provide more diverse and abundant prey. For my second chapter, I compared prey diversity and abundance as well as Walleye (Sander vitreus) diets and condition in a large glacial lake (Lake …
Aquaculture In Africa: Aquatic Animal Welfare, Impact On The Environment And The Sustainability Of The Sector, Mwenda M. Mbaka, Janice H. Cox, Stephen Ronan
Aquaculture In Africa: Aquatic Animal Welfare, Impact On The Environment And The Sustainability Of The Sector, Mwenda M. Mbaka, Janice H. Cox, Stephen Ronan
Aquaculture
The African aquaculture sector recorded the fastest growth in the world between 2006-2018, averaging 10% or more, and is expected to partially fill the growing fish supply-demand gap up to 2063. In 2018, there were about 1.2 million aquafarmers across the continent, an increase from 920 thousand in 2014. According to the African Development Bank, expansion of aquaculture in Africa is hampered by "the overwhelming predominance of tilapia farming, which relies heavily on the production of fingerlings from a limited number of genetically improved strains that are resistant to the many diseases affecting this species, and on the production of …
Nexus Between Animal Welfare, Environment, And Sustainable Development: Resource Document, Wellbeing International
Nexus Between Animal Welfare, Environment, And Sustainable Development: Resource Document, Wellbeing International
Nexus – UNEP – Animal Welfare, Environment, Sustainable Development
This Resource Document has been developed to explore the Nexus (links) between Animal Welfare, the Environment, and Sustainable Development. The document includes relevant citations and reports addressing the topics encompassed by the Nexus. It will be maintained as a “living document” (subject to revision) in the WellBeing International Studies Repository. The original document and subsequent revisions will be kept in the Repository to provide a record of the changes.
Climate-Driven Stock Shifts And Expansions In The U.S. Northeast Shelf: Identifying Challenges, Opportunities, And Barriers Through Fishermen And Manager Perspectives, Sophie A. Swetz
All Theses And Dissertations
Climate-driven warming in the U.S. Northeast Shelf (NES) has led to changes in the spatial distributions of many marine resources. Shifts and expansions of commercially important fish stocks pose major challenges to fishermen and fisheries managers in this region. American lobster (Homarus americanus) in the Gulf of Maine (GOM) is one of these impacted stocks and is projected to continue its shift towards more northern and offshore areas. Continued ocean warming could potentially reduce the GOM lobster stock by up to 60% over the next several decades. Given Maine’s reliance on its lobster fishery—which contributes over 80% of …
River Report. State Of The Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, Contaminants, 2022., Environmental Protection Board, City Of Jacksonville, University Of North Florida, Jacksonville University, Gerry Pinto, Gretchen Bielmyer-Fraser, John Burr, Dale Casamatta, Charles Closmann, Brian P. Zoellner, Ashley Johnson, An-Phong Le, William Penwell, Radha Pyati
River Report. State Of The Lower St. Johns River Basin, Florida: Water Quality, Fisheries, Aquatic Life, Contaminants, 2022., Environmental Protection Board, City Of Jacksonville, University Of North Florida, Jacksonville University, Gerry Pinto, Gretchen Bielmyer-Fraser, John Burr, Dale Casamatta, Charles Closmann, Brian P. Zoellner, Ashley Johnson, An-Phong Le, William Penwell, Radha Pyati
State of the River Report
No abstract provided.
Largemouth Bass In The Upper Mississippi River: An Evaluation Of Management Strategies And Understanding Potential Factors Influencing Dynamic Rate Functions, Kylie Beth Sterling
Largemouth Bass In The Upper Mississippi River: An Evaluation Of Management Strategies And Understanding Potential Factors Influencing Dynamic Rate Functions, Kylie Beth Sterling
MSU Graduate Theses
The Upper Mississippi River (UMR) supports ecologically and economically important commercial and recreational fisheries. One recreational fishery in the UMR is the Largemouth Bass fishery. Recreational fisheries can be effectively managed using information on population dynamics, though little is known about Largemouth Bass population dynamics in large river ecosystems. Therefore, the objectives of this study were to 1) evaluate recruitment, growth, and mortality of three Largemouth Bass populations in the UMR, specifically within Pools 4, 8, and 13, and 2) to use those estimates of recruitment, growth and mortality to inform exploitation models to evaluate best management practices for each …
Ecological Risk Assessment For The State-Wide Small Pelagic Scalefish Resource, S. Blazeski, J. Norriss, K. A. Smith, M. Hourston
Ecological Risk Assessment For The State-Wide Small Pelagic Scalefish Resource, S. Blazeski, J. Norriss, K. A. Smith, M. Hourston
Fisheries research reports
In July 2021, the Department of Primary Industries and Regional Development convened an ecological risk assessment (ERA) of the fisheries that access the State-wide Small Pelagic Scalefish Resource. The ERA considered the potential ecological impacts of the West Coast Purse Seine Fishery, South Coast Purse Seine Fishery, Purse Seine Development Zones and the recreational fishers who catch small pelagic scalefish. The assessment evaluated the impact of each fishing sector/method on all relevant retained and bycatch species, endangered, threatened and protected species, habitats and the broader environment.
Ecological Risk Assessment For The Temperate Demersal Elasmobranch Resource, Maddison Watt, Matias Braccini, Kim Smith, Mathew Hourston
Ecological Risk Assessment For The Temperate Demersal Elasmobranch Resource, Maddison Watt, Matias Braccini, Kim Smith, Mathew Hourston
Fisheries research reports
In March 2021, the Department of Primary Industries and Regional Development convened an ecological risk assessment (ERA) of the fisheries that access the Temperate Demersal Elasmobranch Resource. The ERA considered the potential ecological impacts of the Temperate Demersal Gillnet and Demersal Longline Fisheries and recreational fishers who catch sharks and rays. The assessment evaluated the impact of each fishing sector/method on all relevant retained and bycatch species, endangered, threatened and protected species, habitats and the broader environment.
Ecological Risk Assessment For The Temperate Demersal Elasmobranch Resource, Department Of Primary Industries And Regional Development, Western Australia
Ecological Risk Assessment For The Temperate Demersal Elasmobranch Resource, Department Of Primary Industries And Regional Development, Western Australia
Fisheries research reports
No abstract provided.
Squid And Cuttlefish Resources Of Western Australia, Daniel E. Yeoh Phd, Danielle J. Johnston Phd, David C. Harris
Squid And Cuttlefish Resources Of Western Australia, Daniel E. Yeoh Phd, Danielle J. Johnston Phd, David C. Harris
Fisheries research reports
This report provides a description and assessment of the squid and cuttlefish resources of Western Australia, and all of the fishing activities (i.e. fisheries / fishing sectors) affecting these resources. Encompassed are multiple species in the orders Oegopsida and Myopsida (squid or ‘calamari’) and Sepiida (cuttlefish), including; southern calamari (Sepioteuthis australis), northern calamari (Sepioteuthis lessoniana), Gould’s squid (Nototodarus gouldi), loligo squids Uroteuthis (Photololigo) spp.,giant cuttlefish (Sepia apama), broadclub cuttlefish (Sepia latimanus) and pharaoh cuttlefish (Sepia pharaonis).
2021 Assessment Of The Status Of The West Coast Demersal Scalefish Resource, David V. Fairclough, Sybrand Alex Hesp, Ainslie Denham, Emily A. Fisher, Rachel Marks, Karina L. Ryan, Elaine Lek, Rhys Allen, Brett M. Crisafulli
2021 Assessment Of The Status Of The West Coast Demersal Scalefish Resource, David V. Fairclough, Sybrand Alex Hesp, Ainslie Denham, Emily A. Fisher, Rachel Marks, Karina L. Ryan, Elaine Lek, Rhys Allen, Brett M. Crisafulli
Fisheries research reports
A recovery program for the West Coast Demersal Scalefish Resource was introduced between late 2007 and early 2010, based on the maintenance of retained catches of demersal species (overall suite and each indicator species) by both the commercial and recreational sectors below 50% of the catches reported in 2005/06 (original catch recovery benchmarks).
Catch reductions were aimed at reducing exploitation levels (F, long-term fishing mortality of the key indicator species’ stocks) to below the threshold reference point (F = M, the natural mortality rate), which would then allow stocks to recover to above the …
Otoliths Of South-Western Australian Fish: A Photographic Catalogue, Chris Dowling, Kim Smith, Elain Lek, Joshua Brown
Otoliths Of South-Western Australian Fish: A Photographic Catalogue, Chris Dowling, Kim Smith, Elain Lek, Joshua Brown
Fisheries research reports
No abstract provided.
Squid And Cuttlefish Resources Of Western Australia, Daniel Yeoh, Danielle J. Johnston Phd, David C. Harris
Squid And Cuttlefish Resources Of Western Australia, Daniel Yeoh, Danielle J. Johnston Phd, David C. Harris
Fisheries research reports
No abstract provided.