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Articles 31 - 60 of 104
Full-Text Articles in Life Sciences
Estimating Relative Abundance Of Young Of The Year American Eel, Anguilla Rostrata, In The Virginia Tributaries Of Chesapeake Bay, Patrick J. Greer
Estimating Relative Abundance Of Young Of The Year American Eel, Anguilla Rostrata, In The Virginia Tributaries Of Chesapeake Bay, Patrick J. Greer
Reports
The Atlantic States Marine Fisheries Commission (ASMFC) adopted the Interstate Fishery Management Plan for American Eel (FMP) in November 1999. The Plan focuses on increasing the states’ efforts to collect data on the resource and the fishery it supports through fishery dependent and independent studies. To this end, member jurisdictions (including Virginia) agreed to implement an annual abundance survey of young-of-year American eel (YOY). The survey is intended to “...characterize trends in annual recruitment of the young of the year eel over time [to produce a] qualitative appraisal of the annual recruitment of American eel to the U.S. Atlantic coast …
Plan Management For The Cottesloe Reef Fish Habitat Protection Area., Fisheries Western Australia
Plan Management For The Cottesloe Reef Fish Habitat Protection Area., Fisheries Western Australia
Fisheries management papers
This document is the final Plan of Management for the Cottesloe Reef FHPA. The significant contribution made by the CMPG and members of the community in the preparation of this plan is acknowledged and appreciated by the Department of Fisheries. The overall objective of the Plan of Management is to promote and encourage protection of the Cottesloe Reef aquatic habitat and involve the community in its management. It is anticipated that the establishment of the Cottesloe Reef FHPA will provide a framework, through regulations and education, to manage human activities that have, or may have, a destructive impact on the …
A Five Year Management Strategy For Recreational Fishing In The Gascoyne Region Of Western Australia. Final Report Of The Gascoyne Recreational Fishing Working Group., Gascoyne Recreational Fishing Working Group.
A Five Year Management Strategy For Recreational Fishing In The Gascoyne Region Of Western Australia. Final Report Of The Gascoyne Recreational Fishing Working Group., Gascoyne Recreational Fishing Working Group.
Fisheries management papers
The recommendations contained within this paper were reached after careful consideration of the public submissions provided in response to the working group’s discussion paper A Quality Future for Recreational Fishing in the Gascoyne (Fisheries Management Paper 124). The working group would like to thank everyone who forwarded submissions on the discussion paper and attended public meetings to provide input. The wide variety of comments and views expressed reflect the diverse nature of the recreational fishing sector. I believe this range of views was also well represented by the various members of the working group.
Managing Birds And Controlling Aircraft In The Kennedy Airport–Jamaica Bay Wildlife Refuge Complex: The Need For Hard Data And Soft Opinions, Kevin Brown, R. Michael Erwin, Milo E. Richmond, P A. Buckley, John Tanacredi Ph.D., Dave Avrin
Managing Birds And Controlling Aircraft In The Kennedy Airport–Jamaica Bay Wildlife Refuge Complex: The Need For Hard Data And Soft Opinions, Kevin Brown, R. Michael Erwin, Milo E. Richmond, P A. Buckley, John Tanacredi Ph.D., Dave Avrin
Faculty Works: CERCOM
During the 1980s, the exponential growth of laughing gull (Larus atricilla) colonies, from 15 to about 7600 nests in 1990, in the Jamaica Bay Wildlife Refuge and a correlated increase in the bird-strike rate at nearby John F. Kennedy International Airport (New York City) led to a controversy between wildlife and airport managers over the elimination of the colonies. In this paper, we review data to evaluate if: (1) the colonies have increased the level of risk to the flying public; (2) on-colony population control would reduce the presence of gulls, and subsequently bird strikes, at the airport; …
Monitoring Dioxin Levels In Maine Rivers With Semipermeable Membrane Devices, Heather A. Shoven
Monitoring Dioxin Levels In Maine Rivers With Semipermeable Membrane Devices, Heather A. Shoven
Electronic Theses and Dissertations
The Maine Department of Environmental Protection (DEP) currently monitors river dioxin levels through the sampling and destructive analysis of fish. Recent state law mandates that by December 31, 2002, the dioxin concentrations in fish downstream of a bleached Kraft pulp and paper mill are not to exceed the concentrations in fish upstream of the mill (38 M.R.S.A. §420-A). The objective of this thesis project was to develop an alternate method for determining Kraft mill compliance to this Dioxin law. This new method that uses semipermeable membrane devices (SPMDs) circumvents many of the concerns generated by the upstream-downstream fish test. An …
Groundwater Study Of The Bakers Hill Townsite, Damien Addison
Groundwater Study Of The Bakers Hill Townsite, Damien Addison
Resource management technical reports
A groundwater study was carried out for the townsite of Bakers Hill with the aim of accelerating the implementation of effective salinity management options. The study consisted of a drilling investigation and installation of a piezometer network, a pumping test, groundwater flow modelling and a flood risk analysis.
Groundwater Study Of The Beacon Townsite, F Lewis
Groundwater Study Of The Beacon Townsite, F Lewis
Resource management technical reports
A hydrogeological investigation and a flood risk analysis were carried out for the town of Beacon with the aim of accelerating the implementation of effective salinity management options.
Groundwater Study Of The Narembeen Townsite, Rosemary Knot
Groundwater Study Of The Narembeen Townsite, Rosemary Knot
Resource management technical reports
A groundwater study was carried out for the townsite of Narembeen with the aim of accelerating the implementation of effective salinity management options.
The Crest, Summer 2001, Virginia Institute Of Marine Science
The Crest, Summer 2001, Virginia Institute Of Marine Science
Reports
Table of Contents:
- VIMS to Begin New Ecosystem Management Study
- CBNERRVA Receives Coastal America Partnership Award
- VIMS Shoreline Permit Application Reports Now Available Online
- Marina Program Launched
- Web Based Education Hub Developed by VIMS/Sea Grant Educators
- In the middle of the storm... where VIMS scientists plan to be
- Continental margins--where the action is
- Aquaculture and agriculture--working together for solutions
- Marine Finfish Culture Activities
- Kauffman Aquaculture Center Campaign
- New Graduate Courses for Science Teachers
- VIMS scientists explore pollution of Antarctic sea ice
- Mid-Atlantic Scallop Closed Areas Set to Reopen
- VIMS study poses new questions on river carbon
- Marine Industry Trends
- Stranded …
Groundwater Study Of The Wagin Townsite, Edward K. Crossley
Groundwater Study Of The Wagin Townsite, Edward K. Crossley
Resource management technical reports
A groundwater study was carried out for the townsite of Wagin with the aim of accelerating the implementation of effective salinity management options.
Fish Protection Measures To Ensure Fish For The Future, Jo Bunting
Fish Protection Measures To Ensure Fish For The Future, Jo Bunting
Fisheries management papers
The protection of Western Australia's aquatic animals, plants and habitats is important for many reasons. Fish, and many aquatic invertebrates, have significant commercial, recreational and social importance. Aquatic habitats provide food, refuge and breeding areas for fish and other animals. In addition, some habitats, such as rocky reefs and seagrass meadows, act as nursery sites for juvenile animals. Some habitats and their inhabitants (such as coral reefs) also have aesthetic values which support economically and socially important industries, such as tourism.
Scott Coastal Plain A Strategy For A Sustainable Future, Department Of Agriculture And Food, Western Australia
Scott Coastal Plain A Strategy For A Sustainable Future, Department Of Agriculture And Food, Western Australia
Bulletins 4000 -
The Scott Coastal Plain has significant attributes that make it an area of State and regional significance for agricultural production. The climate, availability of good quality groundwater for irrigation, and large lot sizes provide opportunities for mechanised horticultural production which other parts of the State may not have.
An estimate of the area that could be used for each agricultural land use has been developed, at a broad study area level. The figures presented in this report show that diversified production combining tree plantation and/or irrigation (cropping or hay/silage) with grazing enterprises provides for potential increases in gross margins and …
The Prairie Naturalist Volume 33, No.2 June 2001
The Prairie Naturalist Volume 33, No.2 June 2001
The Prairie Naturalist
A LITERATURE-BASED CHECKLIST OF KANSAS ROBBER FLIES (DIPTERA: ASILIDAE) ▪ R. J. Beckemeyer
DISTRIBUTIONS OF ROOSTING SANDHILL CRANES AS
IDENTIFIED BY AERIAL THERMOGRAPHY ▪ T. L. Parrish, W. A. Hubert, S. H. Anderson, M. 1. Pucherelli, and W. Mangus
CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA 2000 ▪ R. N. Randall
FIRST RECORD OF THE CINERElJS SHREW FOR RILEY COUNTY, KANSAS. R. S. Matlack, D. W. Kaufman, and R. E. Charlton
BADGER REMOVES EGG FROM ISLAND IN PRAIRIE ALKALI LAKE ▪ B. R. Casler and R. K. Murphy
ON THE RARITY OF FOOD PROVISIONING BY MALE DICKCISSELS ▪ L. D. Igl …
An Ethical Framework For Interpreting The United States Endangered Species Act, Cathryn M. Elgin
An Ethical Framework For Interpreting The United States Endangered Species Act, Cathryn M. Elgin
UNLV Theses, Dissertations, Professional Papers, and Capstones
In this study I argue that a holistic approach is better than an individualistic approach for interpreting the United States Endangered Species Act (ESA). I propose that the use of a holistic ethical framework, based on fundamental environmental philosophy, is better in that it more effectively fulfills the ESA's goals of species and ecosystem conservation. Holistic ethics is based on concern for a community as a whole, while individualistic ethics is based on concern for the individual. A holistic approach, I argue, is more beneficial to nature than is an individualistic approach or other non-holistic approaches. I set up basic …
Casco Bay Watershed Wetlands Characterization, State Planning Office
Casco Bay Watershed Wetlands Characterization, State Planning Office
Maine Collection
Casco Bay Watershed Wetlands Characterization
State of Maine Executive Department - State Planning Office
Augusta, Maine, May 2001
Contents: Abstract / Background / Getting Started / Designing the System / The Characterization / The Prioritization / Results / Cautions / Significance of the Approach / Literature Cited / Figure 1 - Biophysical Regions of Maine / Appendix A: Steering Committee Members / Appendix B: Field Verification Form / Appendix C: Contacts
The Response Of First And Second Order Streams To Urban Land-Use In Maine, U.S.A., Chandler Morse
The Response Of First And Second Order Streams To Urban Land-Use In Maine, U.S.A., Chandler Morse
Electronic Theses and Dissertations
Physical, chemical, and biological characteristics of streams draining 20 catchments in Maine, U.S.A were compared to determine the influence of increasing urban intensity on stream ecosystem structure. The catchments had varying levels of urban land-use (percentage of the total impervious area within the catchment) ranging from 1-31%. Stream habitat quality, stability, and water quality consistently decreased as the proportion of impervious surface area increased within the catchment. .Indices based on stream benthic macroinvertebrate communities showed even stronger declines as a function of increasing impervious area in the study catchments. Streams draining catchments with levels of impervious surfaces <6% had higher levels of both total and Ephemeroptera + Plecoptera + Trichoptera (EPT) taxonomic richness. With increased levels of urban intensity, benthic macroinvertebrate communities in streams were characterized by decreased numbers of sensitive taxa. Taxa considered to be moderately sensitive to anthropogenic stress (e.g. Acerpenna (Ephemeroptera), Paracapnia …
Ecological Implications Of Rockweed, Ascophyllum Nodosum (L.) Le Jolis, Harvesting, Jill C. Fegley
Ecological Implications Of Rockweed, Ascophyllum Nodosum (L.) Le Jolis, Harvesting, Jill C. Fegley
Electronic Theses and Dissertations
Harvesting of natural resources usually entails substantial removal of the target species. Where such species are dominant members of natural communities, their removal can have important consequences for their own regeneration as well as for the species assemblages associated with them. Rockweed is an ecologically and commercially important intertidal alga in the North Atlantic, and is increasingly being harvested in Maine. The effects of harvesting on regrowth are well known but little is known about its effects on the species that use this alga as habitat. This research focused on the ecological implications of A. nodosum harvesting on the associated …
Intensification In A Risky Environment: The Case Of Improving Private Grazing Land For Beef Production In Utah, Louise D. Sainsbury
Intensification In A Risky Environment: The Case Of Improving Private Grazing Land For Beef Production In Utah, Louise D. Sainsbury
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Utah ranchers commonly face risks to their livelihoods. The objective of this work was to determine if ranchers could make profitable improvements to private land forage given the combined threat of low beef prices, drought, and possible loss of public grazing.
We used linear programming (LINDO) to identify the most profitable solutions for private land investment with an 11-year simulation. Operations were divided into small, medium, and large size classes. Various forage improvements and public permits were options. Two phases of a beef price cycle (peak and trough) and 2 precipitation patterns (wet and drought) were combined as joint favorable …
Ecology Of Treeline Whitebark Pine (Pinus Albicaulis) Populations In Central Idaho: Successional Status, Recruitment, And Mortality, And A Spring Temperature Reconstruction From Whitebark Pine Tree Rings, Dana Lee Perkins
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This research investigated the successional status of treeline whitebark pine (Pinus albicaulis) populations on 14 stands in central Idaho and used empirical statistical models to determine the principal factors affecting recruitment and mortality. The longest lived whitebark pines from four additional high-elevation sites were used to develop a tree-ring chronology to reconstruct over 1,000 years of average April-May temperature.
The assessment of stand structures using size-frequency distributions generally provides evidence that treeline whitebark pine populations are currently self-sustaining in areas of low to nonexistent incidence of white pine blister rust (Cronartium ribicola). However the presence of …
Effectiveness Of Earthen Escape Ramps In Reducing Big Game Mortality In Utah, Mary L. Hammer
Effectiveness Of Earthen Escape Ramps In Reducing Big Game Mortality In Utah, Mary L. Hammer
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
One-way escape gates and earthen escape ramps are structures used to enable deer to exit the highway right-of-way along fenced roads. I compared the use of one-way escape gates and earthen escape ramps by mule deer on two highways in Utah to determine if deer exhibited a preference for either structure. Results showed that earthen escape ramps were used by mule deer 8-11 times more frequently than one-way gates. Highway mortality data suggest that the installation of the escape ramps likely reduced mortality of mule deer in both study locations, because we could not attribute reductions in mortality to decreased …
Seasonal Patterns Of Photosynthesis In Douglas Fir Seedlings During The Third And Fourth Year Of Exposure To Elevated Co2 And Temperature, James D. Lewis, Melissa S. Lucash, David M. Olszyk, David T. Tingey
Seasonal Patterns Of Photosynthesis In Douglas Fir Seedlings During The Third And Fourth Year Of Exposure To Elevated Co2 And Temperature, James D. Lewis, Melissa S. Lucash, David M. Olszyk, David T. Tingey
Environmental Science and Management Faculty Publications and Presentations
The interactive effects of elevated atmospheric CO2 and temperature on seasonal patterns of photosynthesis in Douglas fir (Psuedotsuga menziesii (Mirb.) Franco) seedlings were examined. Seedlings were grown in sunlit chambers controlled to track either ambient (~400 p.p.m.) CO2 or ambient +200 p.p.m. CO2, and either ambient temperature or ambient +4 °C. Light-saturated net photosynthetic rates were measured approximately monthly over a 21 month period. Elevated CO2 increased net photosynthetic rates by an average of 21% across temperature treatments during both the 1996 hydrologic year, the third year of exposure, and the 1997 hydrologic year. Elevated …
Status Of The Major Oyster Diseases In Virginia 2000 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Status Of The Major Oyster Diseases In Virginia 2000 A Summary Of The Annual Monitoring Program, Lisa M. Ragone Calvo, Eugene M. Burreson
Reports
As a consequence of the relatively warm temperatures, high salinities, and high oyster parasite abundances in the fall of 1999, both P. marinus and H. nelsoni were widely distributed throughout oyster populations in Virginia in 2000. Fortunately, however, we did not see severe epizootics of the diseases as observed in some areas in 1999.
The Foraging And Habitat Ecology Of Black Terns In Maine, Andrew Gilbert
The Foraging And Habitat Ecology Of Black Terns In Maine, Andrew Gilbert
Electronic Theses and Dissertations
The population of Black Terns in Maine is small and factors related to the ecology of this species’ foraging and habitat ecology might limit population growth and recovery. The objectives were to (1) determine if diet and provisioning rates are limiting chick growth, (2) identify and rank suitable habitat in Maine, and (3) determine if precipitation patterns and water level dynamics are limiting in Maine. I compared growth rates of chicks in 1998-2000 in Maine to rates from other studies, determined the influence of colony, year, and diet on growth rates and food deliveries and used an energetics model to …
Groundwater Study Of The Pingelly Townsite, Edward K. Crossley
Groundwater Study Of The Pingelly Townsite, Edward K. Crossley
Resource management technical reports
A groundwater study was carried out in the townsite of Pingelly, Western Australia. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, expansion of a piezometer network, groundwater flow modelling and a flood risk analysis.
Groundwater Study Of The Piawaning Townsite, Russell John Speed, Ali S. Mahtab
Groundwater Study Of The Piawaning Townsite, Russell John Speed, Ali S. Mahtab
Resource management technical reports
A groundwater study was carried out in and around the townsite of Piawaning. It aimed to accelerate the implementation of effective salinity management options. The study consisted of a drilling investigation, expansion of a piezometer network, a pumping test and a flood risk analysis.
Monitoring Relative Abundance Of American Shad In Virginia’S Rivers 2000 Annual Report, John E. Olney, John M. Hoenig
Monitoring Relative Abundance Of American Shad In Virginia’S Rivers 2000 Annual Report, John E. Olney, John M. Hoenig
Reports
Since the moratorium, there have been no monitoring programs that provided direct assessment of stock recovery until this project began in 1998. The ban on in-river fishing in Virginia remained in effect, creating a dilemma for managers who needed reliable information in order to make a rational decision on when the in-river ban could safely be lifted. To address this deficiency, we proposed a method of scientific monitoring to estimate catch rates relative to those recorded before the prohibition of in-river fishing in 1994. This monitoring program began in 1998 and consisted of sampling techniques and locations that were consistent …
Agenda: A Cartography Of Governance: Exploring The Province Of Environmental Ngos, University Of Colorado Boulder. School Of Law, University Of Colorado Boulder. Environmental Program, University Of Tulsa. National Energy-Environment Law & Policy Institute, University Of Colorado Boulder. United Government Of Graduate Students
Agenda: A Cartography Of Governance: Exploring The Province Of Environmental Ngos, University Of Colorado Boulder. School Of Law, University Of Colorado Boulder. Environmental Program, University Of Tulsa. National Energy-Environment Law & Policy Institute, University Of Colorado Boulder. United Government Of Graduate Students
A Cartography of Governance: Exploring the Province of Environmental NGOs (April 7-8)
Presented by: the Colorado Journal of International Environmental Law and Policy on April 7 & 8, 2001. Symposium director: Lakshman D. Guruswamy.
Co-sponsored by: University of Colorado School of Law, University of Colorado Environmental Program, University of Tulsa National Energy-Environment Law and Policy Institute, University of Colorado United Government of Graduate Students.
The papers and edited proceedings of the conference will be published in a special symposium issue of the Colorado Journal of International Environmental Law & Policy (CJIELP).
"The first objective of the Symposium was to understand and explore the growing importance of nongovernmental actors, and delineate the manner …
The Chainsaw And The White Oak: From Astrobiology To Environmental Sustainability, Leo R. Finkenbinder, Dwight E. Neuenschwander
The Chainsaw And The White Oak: From Astrobiology To Environmental Sustainability, Leo R. Finkenbinder, Dwight E. Neuenschwander
Faculty Scholarship – Biology
An American biology professor befriends a Costa Rican farmer who through their relationship stops farming and forest clearing to establish a tourist and research center devoted to saving the country's cloud forest. The Chacon family's experience provides a studied model of sustainability, known in environmental circles as the "White Oak Model."
Esperance Downs Research Station : Rehabilitation Report, H L. Jones
Esperance Downs Research Station : Rehabilitation Report, H L. Jones
Resource management technical reports
The overall program objectives were: rehabilitation of degraded areas on the Esperance Downs Research Station to be demonstrated to restore agricultural productivity. Specific degradation issues addressed were salinity, waterlogging and wind erosion. The second objective was the demonstration of sustainable agricultural systems at a farm scale which either slow, halt or reverse land degradation while being profitable. Specific strategies adopted to reclaim land included surface drainage, tree planting,
Groundwater Study Of The Carnamah Townsite, Russell John Speed
Groundwater Study Of The Carnamah Townsite, Russell John Speed
Resource management technical reports
Report on a hydrological investigation of Carnamah townsite in Western Australia to establish present groundwater levels and to provide a groundwater monitoring network so that any future risk of salinity could be assessed.