Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Environmental Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 18331 - 18360 of 22684

Full-Text Articles in Entire DC Network

Woodpeckers, Terry A. Messmer, Gerald W. Wiscomb Jan 1998

Woodpeckers, Terry A. Messmer, Gerald W. Wiscomb

All Archived Publications

No abstract provided.


Mud Creek Urban Nonpoint Source Demonstration, Paul Vendrell, K. Teague Jan 1998

Mud Creek Urban Nonpoint Source Demonstration, Paul Vendrell, K. Teague

Arkansas Water Resources Center Technical Reports

Northwest Arkansas is the seventh fastest developing area in the nation. The conversion of rolling pastureland into paved city streets, parking lots, and buildings within this rapidly urbanizing region is reducing infiltration and intensifying stormwater runoff. In the city of Fayetteville alone, the population increased from 42,099 to 58,163 between 1990 and 1999, moving the city across the population threshold which will require the Phase II Stormwater Permit process. Approximately half of Fayetteville is included in the Illinois River Watershed, which has been identified as the third highest priority watershed in need of restoration in the state of Arkansas. Mud …


Results Of Investigations Into The Groundwater Response And Productivity Of High Water Use Agricultural Systems 1990-1997 5 White/Beattys' Catchment (Dinninup), A D. Smith, Richard J. George Dr, P R. Scott, D L. Bennett, R J. Rippon, G J. Orr Jan 1998

Results Of Investigations Into The Groundwater Response And Productivity Of High Water Use Agricultural Systems 1990-1997 5 White/Beattys' Catchment (Dinninup), A D. Smith, Richard J. George Dr, P R. Scott, D L. Bennett, R J. Rippon, G J. Orr

Resource management technical reports

High water use vegetation systems for salinity control were trialed on a 250 ha catchment located three km north-west of Dinninup, Western Australia. The catchment receives about 620 mm annual rainfall and 1500 mm annual evaporation. The catchment is characterised by slopes with gradients in excess of 5%, deep weathering (15-25 m to bedrock), active seepage in the valley (piezometric heads 204 m above ground surface) and high recharge (water table fluctuations of 1-4 m).


Cloud Peak Wilderness Management Direction Final Environmental Assessment For The Amendment To The Bighorn National Forest Land And Resource Management Plan, United States Forest Service Jan 1998

Cloud Peak Wilderness Management Direction Final Environmental Assessment For The Amendment To The Bighorn National Forest Land And Resource Management Plan, United States Forest Service

Environmental Assessments (WY)

The purpose of this EA is to amend the Land and Resource Management Plan (LRMP) for the Wilderness Management Standards and Guidelines (S&Gs). The need for the revised S&Gs is to provide more definable and measurable standards related to the items described in the Proposed Action. Current S&Gs do not provide sufficient direction to determine the trend of the Cloud Peak Wilderness (CPW) condition or require conflicting actions. The proposed S&Gs will facilitate determination of the trend of physical, biological and social aspects of the wilderness resource.


Decision Record For The Environmental Assessment For Coal Planning Decisions In The Carbon Basin Area Of The Great Divide Resource Area, United States Department Of The Interior, Bureau Of Land Management Jan 1998

Decision Record For The Environmental Assessment For Coal Planning Decisions In The Carbon Basin Area Of The Great Divide Resource Area, United States Department Of The Interior, Bureau Of Land Management

Record of Decisions (WY)

The Federal Coal Leasing Amendments Act of 1976 requires that Federal coal lands to be considered for leasing must be identified in a comprehensive land use plan. At the time the Great Divide Resource Management Plan (GDRA RMP, 1990) was prepared, approximately 60% of the Federal coal lands in the Carbon Basin Coal Area were leased and exempt from the coal screening/planning process. Subsequently, development of this lease was never pursued and the lease expired. In addition, the coal screening/planning process was not conducted on the remainder of the Federal coal lands in the Carbon Basin area during the RMP …


Stable Isotope Analyses Of Tooth Annuli Reveal Temporal Dietary Records: An Example Using Stellar Sea Lions, Keith Hobson, John Sease Jan 1998

Stable Isotope Analyses Of Tooth Annuli Reveal Temporal Dietary Records: An Example Using Stellar Sea Lions, Keith Hobson, John Sease

United States Department of Commerce: Staff Publications

Stable isotope analysis of teeth of marine mammals can provide valuable information on trophic level and source of feeding. However, the isotopic analysis of whole teeth presents only an average dietary estimate for individuals across the period of growth of that tooth. While such analyses can be valuable, particularly in the case of fossil material, in contrast, isotopic analysis of individual annuli of teeth can provide dietary information for each year of tooth growth, in some cases representing the whole of the animal's life. We measured stable-carbon isotope ratios (13C/12C) in the inorganic (hydroxyapatire) and stable-nitrogen …


An Inventory And Condition Survey Of The Sandstone-Yalgoo-Paynes Find Area, Western Australia, A L. Payne, A M E Van Vreeswyk, K A. Leighton, H J. Pringle, P Hennig Jan 1998

An Inventory And Condition Survey Of The Sandstone-Yalgoo-Paynes Find Area, Western Australia, A L. Payne, A M E Van Vreeswyk, K A. Leighton, H J. Pringle, P Hennig

Technical Bulletins

The inventory and condition survey of the Sandstone-Yalgoo-Paynes Find area, undertaken by the Department of Agriculture and Food, Western Australia (DAFWA) between 1992 and 1993, describes and maps the natural resources of the region’s pastoral leasehold land. This survey report provides a baseline record of the existence and condition of the area’s natural resources, to assist with the planning and implementation of land management practices. The report identified and described the condition of soils, landforms, vegetation, habitat, ecosystems, and declared plants and animals. It also assessed the impact of pastoralism and made land management recommendations. The area surveyed covers about …


The Uses Of Existing Information In The Process Of Setting Social Standards For Proposed Wilderness Areas Of Zion National Park, Mark E. Vande Kamp Jan 1998

The Uses Of Existing Information In The Process Of Setting Social Standards For Proposed Wilderness Areas Of Zion National Park, Mark E. Vande Kamp

Elusive Documents

No abstract provided.


Fisheries Research Report No.109 - The Western Rock Lobster Fishery 1991/92 To 1992/93, C. F. Chubb, E. H. Barker Jan 1998

Fisheries Research Report No.109 - The Western Rock Lobster Fishery 1991/92 To 1992/93, C. F. Chubb, E. H. Barker

Fisheries Research Reports

The 1991/92 and 1992/93 seasons produced 12,200 and 12,300 tonnes of rock lobsters, taken by 12.8 and 11.8 million pot lifts respectively.

This report covering these two seasons is the latest in a series of reports covering The Western Rock Lobster Fishery, which is Western Australia's largest and most valuable fishery.

These reports are a historical record of various data for use by industry and research personnel now and in the future and covers such issues as: management/legislative changes, value of the product and licences, input costs (fuel, bait etc), changes in fishing practices, gear, technology and boats, together with …


Dixie Resource Area Proposed Resource Management Plan And Final Environmental Impact Statement, United States Bureau Of Land Management Jan 1998

Dixie Resource Area Proposed Resource Management Plan And Final Environmental Impact Statement, United States Bureau Of Land Management

All U.S. Government Documents (Utah Regional Depository)

This is the Proposed Resource Management Plan and Final Environmental Impact Statement (Proposed Plan) for the Dixie Resource Area. This document responds to public comments received on the Dixie Resource Area Draft Resource Management Plan and Environmental Impact Statement (Draft Plan). The Proposed Plan also corrects errors in the Draft Plan identified through the public comment process and internal BLM review. The Proposed Plan and associated analysis presents a refined and modified version of the Preferred Alternative and the accompanying impact analysis contained in the Draft Plan. This document is published in condensed form and should be used in conjunction …


Challis Resource Area Proposed Resource Management Plan And Final Environmental Impact Statement Volume 2 (Of 2), United States Department Of The Interior, Bureau Of Land Management Jan 1998

Challis Resource Area Proposed Resource Management Plan And Final Environmental Impact Statement Volume 2 (Of 2), United States Department Of The Interior, Bureau Of Land Management

Resource Management Plans (ID)

The climate of the Challis Resource Area is influenced primarily by maritime air carried eastward on prevailing westerly winds. General climatic characteristics are abundant sunshine, low humidity, and high evaporation. The major precipitation source, particularly for winter storms, is the Northern Pacific Ocean. In the summer, however, most of the thunderstorm activity is caused by moisture-laden air originating from the south, off the Pacific coast of Mexico.


Final Environmental Impact Statement For The Powder River Coal Lease Application (Wyw136142) And Thundercloud Coal Lease Application (Wyw136458), United States Department Of The Interior, Bureau Of Land Management Jan 1998

Final Environmental Impact Statement For The Powder River Coal Lease Application (Wyw136142) And Thundercloud Coal Lease Application (Wyw136458), United States Department Of The Interior, Bureau Of Land Management

Final Environmental Impact Statements (WY)

This Final Environment Impact Statement (FEIS) assesses the environmental consequences of a federal decision to offer two federal coal tracts in southeastern Campbell County, Wyoming for lease at separate, competitive, sealed bid sales, subject to standard and special lease stipulations. The Powder River Lease By Application (LBA) Tract as applied for by Powder River Coal Company includes approximately 4,020 acres containing approximately 515 million tons of federal coal. Powder River coal company operates the adjacent North Antelope and Rochelle Mines. The Thundercloud LBA Tract, which is located approximately 9 miles north of the Powder River LBA Tract, was applied for …


A Framework For Analysing The Hydrolic Condition Of Watersheds, Bruce Mccammon, John Rector, Karl Gebhardt Jan 1998

A Framework For Analysing The Hydrolic Condition Of Watersheds, Bruce Mccammon, John Rector, Karl Gebhardt

United States Bureau of Land Management: Staff Publications

The purpose of this guidance is to provide a national framework for hydrologic analysis and related protocols as components of more comprehensive interdisciplinary watershed analysis. This guidance outlines a process for identifying the essential factors needed to describe hydrologic condition from a vast array of possible factors. The information assembled during the process enables those who conduct hydrologic analyses to participate effectively with other interdisciplinary team members in addressing ecosystem and resource management planning issues. The process helps to organize existing information about a watershed in the form of a watershed case file, which displays and interprets critical hydrologic information …


Measuring & Monitering Plant Populations, Caryl L. Elzinga, Daniel W. Salzer, John W. Willoughby Jan 1998

Measuring & Monitering Plant Populations, Caryl L. Elzinga, Daniel W. Salzer, John W. Willoughby

United States Bureau of Land Management: Staff Publications

This technical reference describes the role of effective monitoring and provides a step-by-step overview of the entire monitoring process for single plant species. The challenges of successful monitoring involve efficient and specific design and a commitment to implementation of the monitoring project, from data collection to reporting and using results. The material in this reference is presented in a logical progression from planning and objective setting, designing the methodology, and taking the measurements in the field to analyzing and presenting the data and making the necessary management responses. However, many of the steps occur simultaneously or provide feedback for the …


Linking People, Purpose, And Place: An Ecological Approach To Agriculture, Heidi Carter, Richard Olson, Charles A. Francis Jan 1998

Linking People, Purpose, And Place: An Ecological Approach To Agriculture, Heidi Carter, Richard Olson, Charles A. Francis

CARI Extension and Education Materials for Sustainable Agriculture

Linking Ecology and Agriculture

Whole Farm Planning

Soil Quality

Agroforestry

Grazing Systems

Weed and Insect Management

Farmer Groups

Farmland Conversion

Resources and Information Sources


Foraging Modes Of Chinstrap Penguins: Contrasts Between Day And Night, John K. Jansen, Peter L. Boveng, John L. Bengtson Jan 1998

Foraging Modes Of Chinstrap Penguins: Contrasts Between Day And Night, John K. Jansen, Peter L. Boveng, John L. Bengtson

United States Department of Commerce: Staff Publications

Penguins rely on vision to travel and hunt at sea. Vision in marine predators, particularly those hunting phototactic prey under a broad range of light intensities, must be better understood to realize how these species respond to changes in their environment. We studied the effects of daily cycles in light intensity on visual predators by examining the duration and timing of chinstrap penguins' Pygoscelis Antarctica foraging trips and the size, composition, and timing of their meals. We used radio telemetry and stomach-contents sampling to study adult penguins that were provisioning chicks during the summers of 1993 and 1994 at Seal …


Sounds Recorded From Baird's Beaked Whale, Berardius Bairdii, Stephen Dawson, Jay Barlow, Don Ljungblad Jan 1998

Sounds Recorded From Baird's Beaked Whale, Berardius Bairdii, Stephen Dawson, Jay Barlow, Don Ljungblad

United States Department of Commerce: Staff Publications

The vocal behavior of ziphiid whales is very poorly known. Free-swimming northern bottlenose whales, Hyperoodon ampullatus, have been recorded producing 3-16 kHz whistles and chirps (Winn et al. 1970; linear equipment frequency response 500 Hz-14 kHz) and 20-30 kHz ultrasonic clicks (Fauchner and Whitehead, unpublished data; equipment response to 35 kHz). A free-swimming mesoplodont beaked whale (probably Mesoplodon hertori) produced ultrasonic clicks (Ljungblad, unpublished data; equipment frequency response to 32 kHz). Sounds have been recorded from a stranded Blainville's beaked whale, Mesoplodon densirostris (Caldwell and Caldwell 1971; equipment frequency response 40 Hz-20 kHz) and a post-stranding, captive …


Seasonal Patterns In The Abundance And Distribution Of California Cetaceans, 1991-1992, Karin A. Forney, Jay Barlow Jan 1998

Seasonal Patterns In The Abundance And Distribution Of California Cetaceans, 1991-1992, Karin A. Forney, Jay Barlow

United States Department of Commerce: Staff Publications

This study presents a detailed seasonal comparison of the abundance and distribution of cetaceans within 100-150 nmi (185-278 km) of the California coast during 1991 and 1992. The results of a shipboard line-transect survey conducted in July-November 1991 (“summer”) were compared to those from aerial line-transect surveys conducted in March-April 1991 and February-April 1992 (“winter”). Using a confidence-interval-based bootstrap procedure, abundance estimates for six of the eleven species included in the comparison exhibited significant (a = 0.05) differences between the winter and summer surveys. Pacific white-sided dolphins (Lagenorhynchus obliquidens), Risso’s dolphins (Grampus griseus), common dolphins ( …


1997 Inventory For Spiranthes Diluvialis Sheviak In Western Nebraska: A Final Report, Volume I, Terri Hildebrand Jan 1998

1997 Inventory For Spiranthes Diluvialis Sheviak In Western Nebraska: A Final Report, Volume I, Terri Hildebrand

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

This study resulted from an agreement between Nebraska Game and Parks Commission (NGPC) and the United States Fish and Wildlife Service (USFW). After the 1996 discovery of Spiranthes diluvialis, in western Nebraska, NGPC was seeking to determine the extent of the Nebraska population. Information on the wet meadow community of orchid occurrence in Nebraska and eastern Wyoming was needed. This report includes descriptions of communities inventoried, Spiranthes diluvialis populations, and additional species monitored by Nebraska and Wyoming Natural Heritage programs.

The 1996 discovery of Spiranthes diluvialis in Nebraska by Hazlett merited the need for further inventory for the species …


Canadian Cooperative Wildlife Health Centre, Volume 5-3, Winter 1998 Jan 1998

Canadian Cooperative Wildlife Health Centre, Volume 5-3, Winter 1998

Canadian Cooperative Wildlife Health Centre: Newsletters and Publications

Quebec Pathologist
Italian Conference
A Critical Need for Information on Diseases of Wild Amphibians
Update on Zoonoses(Chlamydiaand Hanta Virus)
Listeriosis in a Canada goose
Bowhead whale stranding on the northeast coast of Newfoundland
Diseases of beluga whales from the St. Lawrence Estuary: 1998
Syngamiasias in an American robin
Lead poisoning in Canada geese due to skeet shot ingestion
Canine distemper virus in raccoons and striped skunks
Oral masses in Mourning doves
Hairless Grey Squirrels
Chronic wasting disease in a game farm elk in Saskatchewan
Toxoplasmosis in a merlin
Botulism losses in 1998
Avian Cholera in double-crested cormorants


Rat Management For Endangered Species Protection In The U.S. Virgin Islands, Gary W. Witmer, Earl W. Campbell Iii, Frank Boyd Jan 1998

Rat Management For Endangered Species Protection In The U.S. Virgin Islands, Gary W. Witmer, Earl W. Campbell Iii, Frank Boyd

Vertebrate Pest Conference Proceedings: 18th (1998)

Introduced roof rats (Rartus rattus) pose a substantial threat to the fauna and flora of many tropical islands. In the Caribbean, there is concern about rat impacts to several endangered species, including the Atlantic hawksbill sea turtle (Eretmochelys imbricata) and the least tern (Sterna antillarum). The authors surveyed the rat population on Buck Island, Buck Island Reef National Monument, U .S. Virgin Islands in February 1998. Based on three nights of trapping, rats were of low to moderate abundance during the sampling period when compared to results from other Caribbean islands. The impact of …


The Use Of Aerosol Repellents As An Avian Deterrent Strategy, Gwen R. Stevens, Larry Clark, Richard A. Weber Jan 1998

The Use Of Aerosol Repellents As An Avian Deterrent Strategy, Gwen R. Stevens, Larry Clark, Richard A. Weber

Vertebrate Pest Conference Proceedings: 18th (1998)

Traditional protective measures to keep wildlife away from areas include exclusion by use of netting, hazing, and chemical repellents. The primary problem with most hazing systems is that wildlife quickly habituate to the devices if their use falls into a predictable pattern. Repellent substances cause wildlife species to avoid otherwise attractive or palatable resources by creating a disincentive to visit a specific area or consume a particular resource. Chemical repellents, both lethal and non-lethal, are typically used for agricultural and horticultural purposes, but in addition may provide a strategy to deter wildlife in other contexts. Aerosol delivery of chemical repellents …


Deer On Airports: An Accident Waiting To Happen, Sandra E. Wright, Richard A. Dolbeer, Andrew J. Montoney Jan 1998

Deer On Airports: An Accident Waiting To Happen, Sandra E. Wright, Richard A. Dolbeer, Andrew J. Montoney

Vertebrate Pest Conference Proceedings: 18th (1998)

The authors analyzed data on civil aircraft strikes with wild ungulates (deer [Odocoileus spp.], elk [Cervus canadensis] and moose [Alces alces]) in the U.S. from the Federal Aviation Administration (FAA) Wildlife Strike Database and the National Transportation Safety Board (NTSB) Aviation Accident Database for 1983 to 1997. Prior to 1991, the FAA Form 5200-7 for reporting strikes was designated solely for bird strike data, thus, strike reports for non-avian species prior to 1991 are underrepresented. A total of 343 ungulate strikes was reported, 48 from 1983 to 1990 and 295 from 1991 to 1997. Forty-four …


Comparison Of White Mineral Oil And Corn Oil To Reduce Hatchability In Ring-Billed Gull Eggs, Patrica A. Pochop, John L. Cummings, Christi A. Yoder, John E. Steuber Jan 1998

Comparison Of White Mineral Oil And Corn Oil To Reduce Hatchability In Ring-Billed Gull Eggs, Patrica A. Pochop, John L. Cummings, Christi A. Yoder, John E. Steuber

Vertebrate Pest Conference Proceedings: 18th (1998)

Oiling eggs is a potential management method for controlling nuisance or depredating populations of ring-billed gulls, Canada geese, and other bird species. However, no registration for an oiling compound currently exists with the Environmental Protection Agency. Efficacy data were collected for white mineral oil and corn oil to reduce the hatchability of ring-billed gull eggs. Egg failure was 99% in corn oil, 96% in white mineral oil, and 35% in control eggs. Most treated eggs that hatched were treated early in the incubation period, 1 to 8 days after clutch completion. A Wildlife Service Technical Note on the use of …


Fertility Control In Coyotes: Is It A Potential Management Tool?, Thomas J. De Liberto, Eric M. Gese, Frederick F. Knowlton, J. Russell Mason, Michael R. Conover, Lowell Miller, Robert H. Schmidt, Michael K. Holland Jan 1998

Fertility Control In Coyotes: Is It A Potential Management Tool?, Thomas J. De Liberto, Eric M. Gese, Frederick F. Knowlton, J. Russell Mason, Michael R. Conover, Lowell Miller, Robert H. Schmidt, Michael K. Holland

Vertebrate Pest Conference Proceedings: 18th (1998)

Fertility control in wildlife is emerging as a potential management tool. Published research on feral horses, deer, rodents, and rabbits suggest an effective agent producing reversible infertility in these species could be developed. Furthermore, anecdotal reports suggest that infertility can be induced in a greater array of species. In this paper, the authors review methods of fertility control being studied for application in wildlife and focus on their studies designed to evaluate the effectiveness of fertility control agents in coyotes (Canis latrans). Immunocontraception using porcine zona pellucida (PZP) is currently the most promising method of fertility control in …


Tracing The History Of Blackbird Research Through An Industry's Looking Glass: The Sunflower Magazine, George M. Linz, H. Jeffrey Homan Jan 1998

Tracing The History Of Blackbird Research Through An Industry's Looking Glass: The Sunflower Magazine, George M. Linz, H. Jeffrey Homan

Vertebrate Pest Conference Proceedings: 18th (1998)

The Sunflower magazine, the voice of the National Sunflower Organization, featured articles in January 1978 and December 1996 that began with these words, "If Old King Cole was a merry old soul, it was probably because he had only four and twenty blackbirds to contend with, and they were all out of commission!" This quotation captures the sentiments of sunflower growers, who have identified blackbirds as a major production problem since the 1960s. The National (formerly Denver) Wildlife Research Center, a unit within the U.S. Department of Agriculture's Animal and Plant Health Inspection Service Wildlife Services, is charged with both …


The Impact Of Timber Management On The Phytochemicals Associated With Black Bear Damage, Dale L. Nolte, Bruce A. Kimball, Georg J. Ziegltrum Jan 1998

The Impact Of Timber Management On The Phytochemicals Associated With Black Bear Damage, Dale L. Nolte, Bruce A. Kimball, Georg J. Ziegltrum

Vertebrate Pest Conference Proceedings: 18th (1998)

Black bears forage on Douglas-fir vascular tissue in the spring, and this behavior can be severely detrimental to the health and economic value of a timber stand. Foraging is selective in that not all stands are damaged and, within a stand, one tree may be stripped while its neighbor is ignored or minimally sampled. A series of studies was conducted to assess whether bear selectivity is affected by chemical constituents within vascular tissue, and whether these constituents are affected by silvicultural practices. The results are interpreted to identify forest practices that may alleviate damage, or at least predict where damage …


Wildlife Information Sources And Search Methods On The Internet, Diana L. Dwyer Jan 1998

Wildlife Information Sources And Search Methods On The Internet, Diana L. Dwyer

Vertebrate Pest Conference Proceedings: 18th (1998)

Vertebrate pest damage information is pulled from a variety of disciplines ranging from wildlife management to psychology. The Internet has opened the door to what seems to be an unending number of information sources. Researchers can become overwhelmed by the choices and different levels of information available. The correct use of search engines and a checklist of criteria to evaluate the quality of information obtained can help to eliminate the extraneous information and make the time spent on the Internet more productive. There are a large number of wildlife, biology, environmental, and other related sites that are especially useful to …


Managing Island Biotas: Brown Treesnake Control Using Barrier Technology, Gad Perry, Earl W. Campbell Iii, Gordon H. Rodda, Thomas H. Fritts Jan 1998

Managing Island Biotas: Brown Treesnake Control Using Barrier Technology, Gad Perry, Earl W. Campbell Iii, Gordon H. Rodda, Thomas H. Fritts

Vertebrate Pest Conference Proceedings: 18th (1998)

The brown treesnake (Boiga irregularis), accidentally introduced to the previously snake-free U.S. island of Guam after World War 11, decimated the island's naive wildlife. Today, it periodically stows away on craft going to other islands where the ecological damage may be repeated. Barriers offer an effective tool for keeping the snakes out of areas from which they can disperse off-island, as well as sites identified as critical for the protection of human health, conduct of economic activity, or conservation of endangered species. The authors have developed a variety of barrier designs which repulse at least 95% of snake …


The Development Of An Integrated Pest Management Plan For Roof Rats In Hawaiian Macadamia Orchards, Earl W. Campbell Iii, Ann E. Koehler, Robert T. Sugihara Jan 1998

The Development Of An Integrated Pest Management Plan For Roof Rats In Hawaiian Macadamia Orchards, Earl W. Campbell Iii, Ann E. Koehler, Robert T. Sugihara

Vertebrate Pest Conference Proceedings: 18th (1998)

Roof rats (Rattus rattus) damage an estimated 5 to 10% of the developing nut crop in Hawaiian macadamia (Macadamia integrifolia) orchards. Relevant aspects of roof rat biology in macadamia orchards have and continue to be studied with the ultimate goal of developing an ecologically sound and cost-effective integrated pest management plan. The field component of a two-year study of roof rat populations in macadamia orchards has recently been completed. The goal of this study is to clarify the relationship between roof rat seasonal abundance, macadamia flowering, and nut production on five orchards in three regions on …