Steven C Hess, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 58
Evidence of feline immunodeficiency virus, feline leukemia virus, and Toxoplasma gondii in feral cats on Mauna Kea, Hawaii
We determined prevalence to feline immunodeficiency virus (FIV) antibodies, feline leukemia virus (FeLV) antigen, and Toxoplasma gondii antibodies in feral cats (Felis catus) on Mauna Kea Hawaii from April 2002 to May 2004. Six of 68 (8.8%) and 11 of 68 (16.2%) cats were antibody positive to FIV and antigen positive for FeLV, respectively; 25 of 67 (37.3%) cats were seropositive to T. gondii. Anti
Authors
R.M. Danner, Dan M. Goltz, S.C. Hess, P.C. Banko
Using population genetic tools to develop a control strategy for feral cats (Felis catus) in Hawai'i
Population genetics can provide information about the demographics and dynamics of invasive species that is beneficial for developing effective control strategies. We studied the population genetics of feral cats on Hawai'i Island by microsatellite analysis to evaluate genetic diversity and population structure, assess gene flow and connectivity among three populations, identify potential source p
Authors
H. Hansen, S.C. Hess, D. Cole, P.C. Banko
Efficacy of feral pig removals at Hakalau Forest National Wildlife Refuge
We compiled and analyzed data from 1987–2004 on feral pig (Sus scrofa) management and monitoring activities at Hakalau Forest National Wildlife Refuge, a tropical montane rainforest on the island of Hawai`i. These data included annual surveys of feral pig and cattle (Bos taurus) activity, the number of feral ungulates removed from closed management units, age and reproductive status from necropsie
Authors
Steven C. Hess, John J. Jeffrey, Donna Ball, Lev Babich
Final integrated trip report: site visits to Area 50, Andersen Air Force Base, Guam National Wildlife Refuge, War in the Pacific National Historical Park, Guam, Rota and Saipan, CNMI, 2004-2005
Limestone forests are the most diverse natural plant communities of Guam. Like other natural vegetation types, these forests have a long history of anthropogenic disturbances, being altered and shaped by humans for more than 4,000 years. Although this occupation represents a relatively long human influence in comparison to other Pacific islands, animals associated with humans, such as commensal ro
Authors
Steven C. Hess, Linda W. Pratt
A preliminary assessment of mouflon abundance at the Kahuku Unit of Hawaii Volcanoes National Park
Hawaii Volcanoes National Park (HAVO) recently acquired the 115,653 acre Kahuku Ranch unit adjacent to the existing Mauna Loa section of HAVO. Kahuku contains numerous exceptional natural resources including many federally listed threatened and endangered species. An apparently large and growing population of alien mouflon sheep (Ovis gmelini musimon), however, threatens sensitive native plants an
Authors
Steven C. Hess, Ben Kawakami, David Okita, Keola Medeiros
Feral Cats: Too Long a Threat to Hawaiian Wildlife
BACKGROUND
Domestic cats (Felis catus) were first brought to Hawai`i aboard sailing ships of European explorers and colonists. The job of these predators was to control mice and rats on the ships during the long voyages. As in other places, cats were taken in and adopted by the families of Hawai`i and soon became household pets known as popoki. But cats have always been very well equipped to li
Authors
Steven C. Hess, Paul C. Banko
Coping with mist-net capture-rate bias: Canopy height and several extrinsic factors
Many factors other than a species' actual abundance can affect mist-net capture rates. We used ANCOVA models to quantify some potential biases and control their effects, producing adjusted estimates of capture rates that are more directly comparable among mist-net stations. Data came from 46 two-day mist-net sessions from September 1990 to May 1992 at six subtropical forest stations in the Rio Bra
Authors
Elizabeth P. Mallory, Nicholas V. L. Brokaw, Steven C. Hess
Drepanidine movements in relation to food availability in subalpine woodland on Mauna Kea, Hawai'i
Flowers of the mamane tree (Sophoru chrysophylla) are the primary nectar source for Hawaiian honeycreepers in subalpine woodland on Mauna Kea Volcano on the island of Hawai‘i. Mamane seeds are the primary food resource of the endangered Palila (Loxioides bailleui), which is now restricted to subalpine woodland on Mauna Kea. The objectives of this study were to determine the patterns and relative s
Authors
Steven C. Hess, Paul C. Banko, Michelle H. Reynolds, Gregory J. Brenner, Leona P. Laniawe, James D. Jacobi
Population status of the Tinian Monarch (Monarcha takatsukasae) on Tinian, Commonwealth of the Northern Mariana Islands
We conducted surveys to evaluate the current population status of the Tinian Monarch (Monarcha takatsukasae), an insectivorous forest bird restricted to the island of Tinian, Commonwealth of the Northern Mariana Islands. In 1996, we recounted transects surveyed in 1982 and used the same analysis procedure to compare 1982 and 1996 population estimates. The 1996 population estimate was 55,721 ± 3,84
Authors
Michael Lusk, Steve C. Hess, Michelle H. Reynolds, Scott Johnston
Factors related to the recovery of subalpine woodland on Mauna Kea, Hawaii
We measured mature tree and sapling density, tree associations, crown size, age structure, recovery from ungulate browsing, and grass cover at four study sites in two types of subalpine woodland on Mauna Kea volcano, island of Hawaii. Beginning in 1981, introduced ungulates were reduced in number to allow regeneration of Sophora chrysophylla (mamane) in habitat supporting the endangered Hawaiian f
Authors
Steven C. Hess, Paul C. Banko, Gregory J. Brenner, James D. Jacobi
Science and Products
Filter Total Items: 58
Evidence of feline immunodeficiency virus, feline leukemia virus, and Toxoplasma gondii in feral cats on Mauna Kea, Hawaii
We determined prevalence to feline immunodeficiency virus (FIV) antibodies, feline leukemia virus (FeLV) antigen, and Toxoplasma gondii antibodies in feral cats (Felis catus) on Mauna Kea Hawaii from April 2002 to May 2004. Six of 68 (8.8%) and 11 of 68 (16.2%) cats were antibody positive to FIV and antigen positive for FeLV, respectively; 25 of 67 (37.3%) cats were seropositive to T. gondii. Anti
Authors
R.M. Danner, Dan M. Goltz, S.C. Hess, P.C. Banko
Using population genetic tools to develop a control strategy for feral cats (Felis catus) in Hawai'i
Population genetics can provide information about the demographics and dynamics of invasive species that is beneficial for developing effective control strategies. We studied the population genetics of feral cats on Hawai'i Island by microsatellite analysis to evaluate genetic diversity and population structure, assess gene flow and connectivity among three populations, identify potential source p
Authors
H. Hansen, S.C. Hess, D. Cole, P.C. Banko
Efficacy of feral pig removals at Hakalau Forest National Wildlife Refuge
We compiled and analyzed data from 1987–2004 on feral pig (Sus scrofa) management and monitoring activities at Hakalau Forest National Wildlife Refuge, a tropical montane rainforest on the island of Hawai`i. These data included annual surveys of feral pig and cattle (Bos taurus) activity, the number of feral ungulates removed from closed management units, age and reproductive status from necropsie
Authors
Steven C. Hess, John J. Jeffrey, Donna Ball, Lev Babich
Final integrated trip report: site visits to Area 50, Andersen Air Force Base, Guam National Wildlife Refuge, War in the Pacific National Historical Park, Guam, Rota and Saipan, CNMI, 2004-2005
Limestone forests are the most diverse natural plant communities of Guam. Like other natural vegetation types, these forests have a long history of anthropogenic disturbances, being altered and shaped by humans for more than 4,000 years. Although this occupation represents a relatively long human influence in comparison to other Pacific islands, animals associated with humans, such as commensal ro
Authors
Steven C. Hess, Linda W. Pratt
A preliminary assessment of mouflon abundance at the Kahuku Unit of Hawaii Volcanoes National Park
Hawaii Volcanoes National Park (HAVO) recently acquired the 115,653 acre Kahuku Ranch unit adjacent to the existing Mauna Loa section of HAVO. Kahuku contains numerous exceptional natural resources including many federally listed threatened and endangered species. An apparently large and growing population of alien mouflon sheep (Ovis gmelini musimon), however, threatens sensitive native plants an
Authors
Steven C. Hess, Ben Kawakami, David Okita, Keola Medeiros
Feral Cats: Too Long a Threat to Hawaiian Wildlife
BACKGROUND
Domestic cats (Felis catus) were first brought to Hawai`i aboard sailing ships of European explorers and colonists. The job of these predators was to control mice and rats on the ships during the long voyages. As in other places, cats were taken in and adopted by the families of Hawai`i and soon became household pets known as popoki. But cats have always been very well equipped to li
Authors
Steven C. Hess, Paul C. Banko
Coping with mist-net capture-rate bias: Canopy height and several extrinsic factors
Many factors other than a species' actual abundance can affect mist-net capture rates. We used ANCOVA models to quantify some potential biases and control their effects, producing adjusted estimates of capture rates that are more directly comparable among mist-net stations. Data came from 46 two-day mist-net sessions from September 1990 to May 1992 at six subtropical forest stations in the Rio Bra
Authors
Elizabeth P. Mallory, Nicholas V. L. Brokaw, Steven C. Hess
Drepanidine movements in relation to food availability in subalpine woodland on Mauna Kea, Hawai'i
Flowers of the mamane tree (Sophoru chrysophylla) are the primary nectar source for Hawaiian honeycreepers in subalpine woodland on Mauna Kea Volcano on the island of Hawai‘i. Mamane seeds are the primary food resource of the endangered Palila (Loxioides bailleui), which is now restricted to subalpine woodland on Mauna Kea. The objectives of this study were to determine the patterns and relative s
Authors
Steven C. Hess, Paul C. Banko, Michelle H. Reynolds, Gregory J. Brenner, Leona P. Laniawe, James D. Jacobi
Population status of the Tinian Monarch (Monarcha takatsukasae) on Tinian, Commonwealth of the Northern Mariana Islands
We conducted surveys to evaluate the current population status of the Tinian Monarch (Monarcha takatsukasae), an insectivorous forest bird restricted to the island of Tinian, Commonwealth of the Northern Mariana Islands. In 1996, we recounted transects surveyed in 1982 and used the same analysis procedure to compare 1982 and 1996 population estimates. The 1996 population estimate was 55,721 ± 3,84
Authors
Michael Lusk, Steve C. Hess, Michelle H. Reynolds, Scott Johnston
Factors related to the recovery of subalpine woodland on Mauna Kea, Hawaii
We measured mature tree and sapling density, tree associations, crown size, age structure, recovery from ungulate browsing, and grass cover at four study sites in two types of subalpine woodland on Mauna Kea volcano, island of Hawaii. Beginning in 1981, introduced ungulates were reduced in number to allow regeneration of Sophora chrysophylla (mamane) in habitat supporting the endangered Hawaiian f
Authors
Steven C. Hess, Paul C. Banko, Gregory J. Brenner, James D. Jacobi