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Articles 8311 - 8340 of 13453
Full-Text Articles in Entire DC Network
Developing Urban Deer Management Plans: The Need For Public Education, Deborah Green, Glen R. Askins, Phillip D. West
Developing Urban Deer Management Plans: The Need For Public Education, Deborah Green, Glen R. Askins, Phillip D. West
Wildlife Damage Management Conference
Independent public opinion surveys concerning urban deer (Odocoileus virginianus) management were conducted in two Virginia communities. A total of 346 citizens were interviewed in two Random Digit Dial telephone surveys. In addition to questions concerning management techniques and their administration, participants were asked about their experience with deer, their awareness of problems with deer in the area, and their enjoyment of deer. In both localities, non-lethal controls were preferred over lethal controls; trapping and relocation, fencing, repellents, and birth control measures were favored by a majority of residents. The only lethal control acceptable to residents in both communities …
Historical Forces Shaping Americans' Perceptions Of Wildlife And Human-Wildlife Conflicts, Michael R. Conover, Denise O. Conover
Historical Forces Shaping Americans' Perceptions Of Wildlife And Human-Wildlife Conflicts, Michael R. Conover, Denise O. Conover
Wildlife Damage Management Conference
From colonial times until the 19th century, the dominant American view of wildlife and its management was dualistic—wildlife species were divided into good animals (those which had commercial value or could be eaten) or bad animals (those which threatened the colonists’ safety or food supply). Philosophically, early colonial Americans believed that the environment was to be manipulated for man’s purposes. Under the impact of modernization, Darwinian influence, over-exploitation of resources, and environmentally-conscious professionals, Americans in the late 19th century began to appreciate the recreational value of wildlife and to develop a more protective attitude toward it. Still the dichotomy between …
Private Nuisance Wildlife Control: Is There A Future In Kansas?, Charles Lee, Philip Gipson, Lucas Koch
Private Nuisance Wildlife Control: Is There A Future In Kansas?, Charles Lee, Philip Gipson, Lucas Koch
Wildlife Damage Management Conference
The private industry involvement in nuisance animal damage control is increasing in Kansas. Improved oversight of that industry is needed and the Kansas Department of Wildlife and Parks (KDWP) plans to implement a mandatory education and certification program beginning in 1998. KDWP currently issues permits to individuals who wish to trap or control nuisance animals outside of normal harvest seasons. Individuals who have held these permits to conduct nuisance animal damage control were surveyed in 1995 to better understand the status and needs of that industry in Kansas. A 3-page mail survey was sent to all 93 permit holders. Raccoons …
Wildlife-Caused Losses For Catfish Producers In 1996, Alice P. Wywialowski
Wildlife-Caused Losses For Catfish Producers In 1996, Alice P. Wywialowski
Wildlife Damage Management Conference
In January 1997, the National Agricultural Statistics Service (NASS) surveyed catfish producers about wildlife-caused losses in 1996, Of the 1,465 catfish producers in 15 states surveyed, 1,008 (68.8%) agreed to complete the survey. Surveys were conducted primarily by telephone, but some producers received mail surveys. The response rated varied among states. The majority of catfish producers were in Mississippi (n=-300), followed by Alabama (n=163), and then Arkansas (n=117). The remaining states each had < 100 respondents. Data were analyzed for 6 regions, each with a sample size of > 100 respondents. Overall, 69% of catfish producers cited a wildlife-caused loss of catfish. Producers cited losses to wildlife most frequently in Mississippi (81%), followed by states adjoining …
What Do Driver’S Education Manuals Contain Relative To Wildlife And Animal Dangers On Roads?, A. L. Robinson, P. F. Scanlon, J. A. Parkhurst
What Do Driver’S Education Manuals Contain Relative To Wildlife And Animal Dangers On Roads?, A. L. Robinson, P. F. Scanlon, J. A. Parkhurst
Wildlife Damage Management Conference
Most states in the U.S. provide driver’s education manuals (DEMs) as instructional material for instruction of novice drivers. U.S. territories and other countries also provide DEMs. DEMs were requested from U.S. states and territories and acquired from a number of foreign sources. Content was examined relative to animals and safe driving. Of the 42 U.S. DEMs reviewed, 20 had specific advice about coping with animals on the road, 25 used signs involving animals as illustrations, 6 dealt specifically with deer, and 14 referred to farm animals (i.e., horseback riders, animal drawn vehicles, range animals). The Ontario, Canada, and Victoria, Australia, …
Electric Fencing Reduces Heron Predation At Northeastern Trout Hatcheries, Mark E. Tobin, James F. Glahn, Erica S. Rasmussen
Electric Fencing Reduces Heron Predation At Northeastern Trout Hatcheries, Mark E. Tobin, James F. Glahn, Erica S. Rasmussen
Wildlife Damage Management Conference
Great blue herons (Ardea herodius) are the most common avian predator at commercial trout hatcheries in the northeastern United States. We evaluated a 2-strand electric fence for excluding this species from raceways at 2 commercial trout hatcheries in central Pennsylvania. Fences consisted of high density polyethylene 400-lb strength tape supported by fiberglass posts and energized by either a battery-powered or a solar-powered fence charger. Labor and material for constructing the fences at the 2 sites averaged $1.32/m of raceway. Bird visitation at the 2 sites initially declined, but returned to pre-installation levels. However, bird use of raceways declined …
Efficacy Of Deer StopperTm Repellent For Reducing White-Tailed Deer Damage To Ornamental Plantings, James B. Armstrong, M. Keith Causey, John T. Owen
Efficacy Of Deer StopperTm Repellent For Reducing White-Tailed Deer Damage To Ornamental Plantings, James B. Armstrong, M. Keith Causey, John T. Owen
Wildlife Damage Management Conference
A 2-year study was undertaken to assess the efficacy of Deer StopperTM repellent for reducing white-tailed deer damage to ornamental plantings. Efficacy testing was conducted on a captive deer herd at Auburn University’s White-tailed Deer Research Facility and the Stimpson Wildlife Sanctuary, Jackson, AL. Japanese Holly (Ilex crenata), a highly preferred browse species in this area, was used as the test plant at all study sites. Plants were arranged randomly between treatment and control. Treatment plants were sprayed with prescribed applications of Deer StopperTM and percent defoliation and browsing estimated for each plant. Repeated measures analysis …
Attempted Relocation Of A Ring-Billed Gull Roost At Washington National Airport, Jessica Dewey, Martin Lowney
Attempted Relocation Of A Ring-Billed Gull Roost At Washington National Airport, Jessica Dewey, Martin Lowney
Wildlife Damage Management Conference
Gulls, particularly ring-billed gulls [Larus delawarensis], have been identified as a threat to aircraft operations at Washington National Airport (now Ronald Reagan National Airport) in northern Virginia. Through bird surveys conducted in 1992, 1993, and 1997, an estimated 7,000 gulls were observed roosting during winter on the Potomac River near the airport. A harassment program was run on 5 consecutive evenings, 24-28 February 1997, to relocate the roosting gulls. Six to 8 people shot pyrotechnics from shore and 2 boats for 2 hours prior to dusk each evening. Each evening the gulls arrived consistently later than the prior …
Double-Crested Cormorant And Ring-Billed Gull Damage Management On Lake Champlain: Are Basin-Wide Objectives Achievable?, Richard Chipman, Dennis Slate, Larry Garland, David Capen
Double-Crested Cormorant And Ring-Billed Gull Damage Management On Lake Champlain: Are Basin-Wide Objectives Achievable?, Richard Chipman, Dennis Slate, Larry Garland, David Capen
Wildlife Damage Management Conference
Ring-billed gulls (Larus delewarensis) and double-crested cormorants (Phalacrocorx auritus) have nested on Lake Champlain since 1949 and 1982, respectively. Recent increases in cormorant nesting populations and pioneering activities of both species to previously uncolonized islands have resulted in impacts related to accumulation of bird guano and interspecific competition with less common species. Of primary concern are: decreases in wildlife and plant diversity on islands; reduced aesthetics and property values of island associated with the loss of trees; and predation or competition for nesting space with other species such as the state-endangered common tern (Sterna hirundo …
Nesting Populations Of Double-Crested Cormorants, Great Blue Herons, And Great Egrets In The United States And Canada: Implications For Management, Jerrold L. Belant, Laura A. Tyson
Nesting Populations Of Double-Crested Cormorants, Great Blue Herons, And Great Egrets In The United States And Canada: Implications For Management, Jerrold L. Belant, Laura A. Tyson
Wildlife Damage Management Conference
Populations of piscivorous birds in North America are receiving increasing attention in the southeast United States because of depredations at aquaculture facilities. We obtained recent (most since 1994) estimates for the number of nesting double-crested cormorants (Phalacrocorax auritus), great blue herons (Ardea herodias), and great egrets (Casmerodius albus) in the United States (US) and Canada from published references and by conducting telephone interviews with state and provincial biologists. Using previously-published data, we also determined annual rates of change in the number of cormorants since about 1990. Estimates for minimum numbers of nesting pairs (minimum …
Repellency Of Methyl Anthranilate To Captive Great Egrets, Michael L. Avery, John S. Humphrey, David G. Decker
Repellency Of Methyl Anthranilate To Captive Great Egrets, Michael L. Avery, John S. Humphrey, David G. Decker
Wildlife Damage Management Conference
Because effective deterrents are hard to find, it has been suggested that methyl anthranilate (MA) be applied to the surface of fish ponds to discourage bird predation. We conducted two short-term evaluations of a formulation for this use, ReJeX-iT TP-40. First, we assessed the response of tropical fish to TP-40 applications in small wading pools. After 15 minutes, all fish virtually were motionless at or near the bottom of the pool. Fish in the control pools actively swam and most were within 3 cm of the surface of the pool. No mortality occurred, and fish activity returned to almost normal …
The Legal Roles And Responsibilities Of A Community Concerning Crop Depredation By White-Tailed Deer, Eric G. Darracq, Stephen R. Chapman
The Legal Roles And Responsibilities Of A Community Concerning Crop Depredation By White-Tailed Deer, Eric G. Darracq, Stephen R. Chapman
Wildlife Damage Management Conference
The interwoven issues of the legal roles and responsibilities that landowners (i.e., farmers, foresters, and hunters) and a state agency have to control deer densities in rural areas that directly affect crop depredation and various stakeholders will be addressed in this paper. Because unmanaged deer populations severely can damage agricultural crops, the financial cost of this deer damage is borne entirely by individual private landowners. The South Carolina Department of Natural Resources (SCDNR) is the regulatory state agency in South Carolina responsible for annually promulgating rules and regulations pertaining to white-tailed deer harvest by hunters. Even though deer are property …
Wildlife Damage To Agricultural Crops In Pennsylvania: The Farmers' Perspective, Margaret C. Brittingham, Walter M. Tzilkowski, James M. Zeidler, Matthew J. Lovallo
Wildlife Damage To Agricultural Crops In Pennsylvania: The Farmers' Perspective, Margaret C. Brittingham, Walter M. Tzilkowski, James M. Zeidler, Matthew J. Lovallo
Wildlife Damage Management Conference
Agricultural damage by wildlife is a major concern for both agricultural and wildlife agencies at the state and federal level. Our objective was to estimate wildlife damage to agricultural crops on a statewide basis. We sent questionnaires to 4,958 farmers and 1,003 were returned after 2 mailings. Twenty-five percent of farmers responding to our survey rated the level of wildlife damage to their crops as severe or very severe, 46% as moderate, and 29% had none or very little. Mean levels of crop loss to wildlife ranged from 6% for wheat to 10% for corn grain, and white-tailed deer ( …
Controlling Great-Tailed Grackle Damage To Citrus In The Lower Rio Grande Valley, Texas, James F. Glahn, Jose D. Palacious, Melvin V. Garrison
Controlling Great-Tailed Grackle Damage To Citrus In The Lower Rio Grande Valley, Texas, James F. Glahn, Jose D. Palacious, Melvin V. Garrison
Wildlife Damage Management Conference
Great-tailed grackle (Quiscalus mexicanus) damage to citrus is a serious concern to producers in the lower Rio Grande Valley of Texas. Damage caused by grackles pecking fruit is initiated by breeding colonies in the spring on immature fruit and extends through the fall and winter on ripening fruit. The most significant damage occurs during the post-breeding period of July through September when neither the currently registered DRC-1339-treated dog food bait nor frightening strategies are effective. Observations by Texas Wildlife Services personnel suggested that watermelon was highly attractive to grackles during the period when dog food baits are poorly …
Cost Comparisons For White-Tailed Deer Live Capture Techniques, Robert L. Pooler, Paul D. Curtis, Milo E. Richmond
Cost Comparisons For White-Tailed Deer Live Capture Techniques, Robert L. Pooler, Paul D. Curtis, Milo E. Richmond
Wildlife Damage Management Conference
During March 13 - July 16, 1996, we captured 75 white-tailed deer (Odocoileus virginianus) using dart guns, rocket nets, and Clover traps on the Seneca Army Depot in Romulus, New York. We compared the labor and cost efficiency of these trapping techniques and reported on mortalities. Darting from a vehicle ($196/deer), and rocket-netting ($172/deer) were similar in time and cost efficiency. Darting from a blind was more costly ($358/deer) due to minimal time devoted to the technique and a high initial material investment. Clover traps were relatively inefficient (15.2 hours/deer) and costly ($895/deer), primarily due to a lack …
Development Of The Virginia Cooperative Coyote Control Program To Protect Livestock, Martin Lowney, John Houben, Phil Eggborn
Development Of The Virginia Cooperative Coyote Control Program To Protect Livestock, Martin Lowney, John Houben, Phil Eggborn
Wildlife Damage Management Conference
The Virginia Cooperative Coyote Control Program was created in 1990 to address increasing livestock losses to coyotes and the inability of producers to solve such problems themselves. The eastern coyote arrived in Virginia in the late 1970s or early 1980s. Lobbying efforts of agricultural groups, such as the Virginia Sheep Federation, helped create a cost-share program administered by the Virginia Department of Agriculture and Consumer Services (VDACS) and U.S. Department of Agriculture-Animal and Plant Health Inspection Service-Wildlife Services (USDA-APHIS-WS). The objective of the program was to educate producers about control methods and to alleviate damage by removing offending coyotes where …
Do You Have Your Skates On?, Gary J. San Julian
Do You Have Your Skates On?, Gary J. San Julian
Wildlife Damage Management Conference
It is an honor to keynote this conference as we think about our profession in the next century. Jim asked me to predict what the future of wildlife damage management might look like in the year 2020. I explained to him that I have not been actively engaged in doing wildlife damage work for almost 9 years and I had been in an administrative role. Jim knew that I am going back to a faculty position in the next several months. He thought it was great for a person coming out of retirement to predict the future.
Development Of A Double-Crested Cormorant Damage Management Plan For The Southeastern United States, Keith J. Andrews, Pete Poulos, Charles Bo Sloan, Jerrold L. Belant, Paige G. Ross, Paul Debow
Development Of A Double-Crested Cormorant Damage Management Plan For The Southeastern United States, Keith J. Andrews, Pete Poulos, Charles Bo Sloan, Jerrold L. Belant, Paige G. Ross, Paul Debow
Wildlife Damage Management Conference
In response to needs within the aquaculture industry to alleviate increasing depredation by double-crested cormorants (Phalacrocorax auritus), the U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, in conjunction with Federal, State, and Canadian wildlife and fisheries agencies, the aquaculture industry, and other wildlife professionals, is developing the framework for a comprehensive cormorant damage management program that uses an integrated wildlife damage management approach. This cooperative effort will produce a meaningful, mutually beneficial program that will reduce the effects of cormorants on aquaculture and sport and commercial fisheries, improve understanding of cormorant biology, and avert …
Aldo Leopold's Land Ethic: Implications For Predator Management, Johnny Stowe
Aldo Leopold's Land Ethic: Implications For Predator Management, Johnny Stowe
Wildlife Damage Management Conference
The golden rule of Aldo Leopold’s land ethic clearly supports active management of predators that harm populations of rare animal species. In the early part of his career, while working as a forester in the American Southwest, Leopold advocated exterminating large predators like gray wolves (Canis lupus lupus) and grizzly bears (Ursus arctos horribilis) from the region, but he later changed his mind when he realized that native predators help maintain ecosystem integrity. Philosophically, Leopold’s changing views on predators exemplifies John Dewey’s customary and reflective morality. But Leopold’s dramatic narrative in A Sand County Almanac about …
The Press And Citizen Participation: A Content Analysis, Lisa Pelstring, James Shanahan, Ben Perry
The Press And Citizen Participation: A Content Analysis, Lisa Pelstring, James Shanahan, Ben Perry
Wildlife Damage Management Conference
We conducted a content analysis of regional New York State newspapers to assess media coverage of the Department of Environmental Conservation’s (DEC) deer management program. The goal of this analysis was to ascertain media depiction of DEC’s deer management program during the 1985-97 time period. Specifically, this research examines how deer management issues were portrayed both prior to and after implementation of a DEC public participation program (the Citizen Task Force [CTF] process) to determine if deer management issues received more favorable coverage after CTFs were implemented.
Bird Abundance At Accomack County Southern Landfill, Melfa, Virginia, In Relation To Various Management Activities, Laura Francoeur, Martin Lowney
Bird Abundance At Accomack County Southern Landfill, Melfa, Virginia, In Relation To Various Management Activities, Laura Francoeur, Martin Lowney
Wildlife Damage Management Conference
Birds, especially gulls (Larus spp.), are attracted to landfills, and when landfills are close to airports, birds can pose a threat to aircraft safety. We conducted a 1-year ecological study to address concerns of the Federal Aviation Administration (FAA) and Accomack County, Virginia, officials over potential wildlife hazards caused by the Accomack County Southern Landfill. During 48 surveys conducted from December 1995 to December 1996, we observed 112,693 birds at the landfill (x̄=503). Nine species represented 97% of all observations. Bird numbers varied during the year, increasing during winter and declining during summer. Bird abundance appeared unaffected by …
Characteristics Of Gray Squirrel Release Sites Selected By Kentucky Nuisance Wildlife Control Operators, Sara Steen-Ash, Thomas G. Barnes, Jeff T. Hutchinson, Jeffery L. Larkin, Brian E. Washburn, Jason L. Weese, Henry F. Yacek Jr.
Characteristics Of Gray Squirrel Release Sites Selected By Kentucky Nuisance Wildlife Control Operators, Sara Steen-Ash, Thomas G. Barnes, Jeff T. Hutchinson, Jeffery L. Larkin, Brian E. Washburn, Jason L. Weese, Henry F. Yacek Jr.
Wildlife Damage Management Conference
A telephone survey of Kentucky nuisance wildlife control operators (NWCOs) (n=66) was conducted in April of 1997 to assess their knowledge and practices regarding nuisance gray squirrel (Sciurus carolinensis) release-site habitat. Thirty-three percent of NWCOs (n=22) trapped and relocated >1 nuisance gray squirrel in the previous year and these individuals/companies were selected for the survey. NWCOs trap and release >1,700 squirrels annually in Kentucky. Sampled release sites varied in size from 18 to 5,200 acres, and >70% were classified as poor to marginal habitat. Three of the release sites sampled provided adequate to optimum gray squirrel habitat. Actual …
Conservation Of A Dinosaur In Modern Times: South Carolina’S Alligator Management Program, Walter E. Rhodes
Conservation Of A Dinosaur In Modern Times: South Carolina’S Alligator Management Program, Walter E. Rhodes
Wildlife Damage Management Conference
American alligator (Alligator mississippiensis) conservation is necessary given the animal's role in wetland ecosystems and its economic value. Although the alligator appears to be no longer threatened with extinction, the reptile’s perceived reputation and a burgeoning human population combine to create a management paradox. Alligator management in South Carolina consists of a Nuisance Control Program, a Private Lands Harvest Program, and public education. Annually, over 750 alligator complaints are received by the South Carolina Department of Natural Resources (SCDNR), and harvest averages about 250 animals. To address alligator/human interaction in rural habitats, a harvest on private lands was …
The Mass Media And Stakeholders' Beliefs About Suburban Wildlife, Cynthia A. Loker, James Shanahan, Daniel J. Decker
The Mass Media And Stakeholders' Beliefs About Suburban Wildlife, Cynthia A. Loker, James Shanahan, Daniel J. Decker
Wildlife Damage Management Conference
This study examines how suburban audiences obtain information about 3 species in New York State (whitetail deer [Odocoileus virginianus], beaver [Castor canadensis], and Canada goose [Branta canadensis]). Respondents in 3 suburban areas were surveyed on concerns and interests about a particular species in their area. Respondents also were surveyed about preferred sources for species information and actual source use. Finally, respondents were surveyed about general media use. “Uses-and-gratifications” theory was used to characterize respondents’ information behavior for species information. Specific recommendations for communication planning are offered.
Vertebrate Damage Management: The Future Of An Evolving Profession, Robert H. Giles Jr.
Vertebrate Damage Management: The Future Of An Evolving Profession, Robert H. Giles Jr.
Wildlife Damage Management Conference
The author argues that an objective of a new group of people taking a systems approach to large wild animal problems should be to manage damage as a cost-reducing role within a total, profitable, long-term system, not necessarily to control the "pest." The needs are for well-grounded financial analyses both for customers, the public, the resources, and the well-being of the profession. A point of view is advanced for the need for evolving pest-related operations into a new, unique profession that is involved in a profound way as an element of a cost-effective total land and human resource production system.
Pesticide Use On Utah's Small Grain Crops, Howard Deer, Alan H. Roe
Pesticide Use On Utah's Small Grain Crops, Howard Deer, Alan H. Roe
All Current Publications
Data from usable pesticide survey responses was entered in a computer database and checked for entry errors. A database record was stored for each unique combination of grower, crop, pesticide, and target pest(s). All character data (such as brand names) were standardized for consistent usage and spelling. Specific methods used to enter and standardize data and to perform calculations are described below:
The High-Low Mix: A New Concept In Military Space, Matt Bille, Robyn Kane
The High-Low Mix: A New Concept In Military Space, Matt Bille, Robyn Kane
Small Satellite Conference
U.S. military forces are dependent on space systems for communications, navigation, and other critical support functions. As we learned in Desert Storm, however, the requirements for space capability are difficult to forecast and easy to underestimate. The current U.S. approach relies on high-capacity, high-orbit satellites. Such satellites are relatively cost-effective: the larger the satellite, the lower the cost per pound to orbit it, and the lower the cost per unit of capacity. However, cost-effectiveness is not always the appropriate standard for selecting military systems. Combat forces must be provided with the capability they need to operate and win. This paper …
Microsats For Environmental Monitoring - And Some Current Canadian Initiatives, Ron Buckingham
Microsats For Environmental Monitoring - And Some Current Canadian Initiatives, Ron Buckingham
Small Satellite Conference
This paper examines the usefulness of microsats for environmental monitoring. It is based in part on a study done by Routes Incorporated for the Canadian Space Agency in 1995, plus more recent information. We define microsats and their instruments as missions whose overall payload, platform, launch, ground segment and operations costs is within a $2M to $ 10M range. The paper describes several types of environmental atmospheric and earth surface monitoring task that could be achieved with microsats, e.g. observation of atmospheric phenomena such as polar stratospheric clouds, gravity waves and ozone profiles. Compact, simple, low-cost imaging spectrographs are candidates …
Focus (Focal Optical Control Using Steppers) - "Stepping" Into The Future Of Autonomous Focal Plane Control, Curtis Bingham, Matthew Felt
Focus (Focal Optical Control Using Steppers) - "Stepping" Into The Future Of Autonomous Focal Plane Control, Curtis Bingham, Matthew Felt
Small Satellite Conference
The alignment of optical components in infrared telescopes is an involved process. The FOCUS design is presented to ensure that optics stay in the proper orientation at cryognic temperatures. FOCUS is based on converting the infinite rotary motion supplied by a stepper motor into linear motion. This motion is used to create a three point actuation system to control the focus and tilt of a focal plane. This system can be modified to actuate any element of the satellite needing three axis positioning. Emphasis has been placed on the mechanical aspects of the design with the knowledge that the controls …
Big Science On A Small Budget: A University Sounding Rocket, Ellen Riddle, Jennifer Owens
Big Science On A Small Budget: A University Sounding Rocket, Ellen Riddle, Jennifer Owens
Small Satellite Conference
The High-altitude Ozone Measuring and Educational Rocket (HOMER), a pilot for the NASA Student Launch Program, was a suborbital rocket investigation conducted by the Colorado Space Grant Consortium (CSGC). The HOMER mission provided: a unique educational opportunity for hands-on involvement by students in colleges and universities throughout Colorado; measurements of ozone and atmospheric constituents which affect ozone in the Earth's atmosphere; a demonstration of advanced and low-cost technologies that enable these measurements; and an intercomparison of measurement techniques. HOMER was launched from Wallops Flight Facility in Wallops Island, Virginia on August 12, 1996. HOMER is a follow-on payload to two …