Dennis LaPointe (Former Employee)
Science and Products
Filter Total Items: 52
Modeling future conservation of Hawaiian Honeycreepers by mosquito management and translocation of disease-tolerant Amakihi Modeling future conservation of Hawaiian Honeycreepers by mosquito management and translocation of disease-tolerant Amakihi
Avian malaria is an important cause of the decline of endemic Hawaiian honeycreepers. Because of the complexity of this disease system we used a computer model of avian malaria in forest birds to evaluate how two proposed conservation strategies: 1) reduction of habitat for mosquito larvae and 2) establishment of a low-elevation, malaria-tolerant honeycreeper (Hawaii Amakihi) to mid...
Authors
Peter Hobbelen, Michael Samuel, Dennis Lapointe, Carter Atkinson
Ecology and conservation biology of avian malaria Ecology and conservation biology of avian malaria
Avian malaria is a worldwide mosquito-borne disease caused by Plasmodium parasites. These parasites occur in many avian species but primarily affect passerine birds that have not evolved with the parasite. Host pathogenicity, fitness, and population impacts are poorly understood. In contrast to continental species, introduced avian malaria poses a substantial threat to naive birds on...
Authors
Dennis LaPointe, Carter Atkinson, Michael Samuel
Analysis of the trap gene provides evidence for the role of elevation and vector abundance in the genetic diversity of Plasmodium relictum in Hawaii Analysis of the trap gene provides evidence for the role of elevation and vector abundance in the genetic diversity of Plasmodium relictum in Hawaii
Background: The avian disease system in Hawaii offers an ideal opportunity to investigate host-pathogen interactions in a natural setting. Previous studies have recognized only a single mitochondrial lineage of avian malaria (Plasmodium relictum) in the Hawaiian Islands, but cloning and sequencing of nuclear genes suggest a higher degree of genetic diversity. Methods: In order to...
Authors
Margaret Farias, Carter Atkinson, Dennis LaPointe, Susan Jarvi
Keeping Hawai’i’s forest birds one step ahead of avian diseases in a warming world: a focus on Hakalau Forest National Wildlife Refuge. A case study from the National Conservation and Training Center Structured Decision Making Workshop Keeping Hawai’i’s forest birds one step ahead of avian diseases in a warming world: a focus on Hakalau Forest National Wildlife Refuge. A case study from the National Conservation and Training Center Structured Decision Making Workshop
This report is a product of a one-week workshop on using Structured Decision Making to identify and prioritize conservation actions to address the threat of climate change on Hawaii‟s native forest bird community. Specifically, t his report addresses the issue of global warming ‟s likely role in increasing disease prevalence in upper elevation forests of Hawaii, negatively impacting...
Authors
Eben H. Paxton, Jeff Burgett, Eve McDonald-Fadden, Ellen Bean, Carter Atkinson, Donna Ball, Colleen Cole, Lisa H. Crampton, Jim Kraus, Dennis LaPointe, Loyal Mehrhoff, Michael Samuel, Donna Brewer, Sarah Converse, Steve Morey
The dynamics, transmission, and population impacts of avian malaria in native hawaiian birds: A modeling approach The dynamics, transmission, and population impacts of avian malaria in native hawaiian birds: A modeling approach
We developed an epidemiological model of avian malaria (Plasmodium relictum) across an altitudinal gradient on the island of Hawaii that includes the dynamics of the host, vector, and parasite. This introduced mosquito‐borne disease is hypothesized to have contributed to extinctions and major shifts in the altitudinal distribution of highly susceptible native forest birds. Our goal was...
Authors
Michael Samuel, P.H.F. Hobbelen, F. Decastro, Jorge Ahumada, Dennis Lapointe, Carter Atkinson, Bethany Woodworth, P.J. Hart, D.C. Duffy
Thermal constraints to the sporogonic development and altitudinal distribution of avian malaria Plasmodium relictum in Hawai'i Thermal constraints to the sporogonic development and altitudinal distribution of avian malaria Plasmodium relictum in Hawai'i
More than half of the Hawaiian honeycreepers (Drepanidinae) known from historical records are now extinct. Introduced mosquito-borne disease, in particular the avian malaria Plasmodium relictum, has been incriminated as a leading cause of extinction during the 20th century and a major limiting factor in the recovery of remaining species populations. Today, most native Hawaiian bird...
Authors
Dennis Lapointe, M.L. Goff, Carter Atkinson
Taqman Real-Time PCR Detects Avipoxvirus DNA in Blood of Hawaìi `Amakihi (Hemignathus virens) Taqman Real-Time PCR Detects Avipoxvirus DNA in Blood of Hawaìi `Amakihi (Hemignathus virens)
Background Avipoxvirus sp. is a significant threat to endemic bird populations on several groups of islands worldwide, including Hawaìi, the Galapagos Islands, and the Canary Islands. Accurate identification and genotyping of Avipoxvirus is critical to the study of this disease and how it interacts with other pathogens, but currently available methods rely on invasive sampling of pox...
Authors
Margaret Farias, Dennis LaPointe, C. Atkinson, Christopher Czerwonka, Rajesh Shrestha, Susan Jarvi
Knemidokoptic mange in Hawai`i `Amakihi (Hemignathus virens) on the island of Hawai`i Knemidokoptic mange in Hawai`i `Amakihi (Hemignathus virens) on the island of Hawai`i
Lesions resembling knemidokoptic mange on the feet and tarsometatarsi of two Hawai`i `Amakihi (Hemignathus virens) were observed while the researchers were mist-netting wild passerines at Manuka Natural Area Reserve on the island of Hawai`i between 14 June 2007 and 19 June 2007. During subsequent mist-netting from September 2007 through February 2008, we found 26% (7/27) of the Hawai`i...
Authors
Jacqueline Gaudioso, Dennis Lapointe, Patrick Hart
Introduced avian diseases, climate change, and the future of Hawaiian honeycreepers Introduced avian diseases, climate change, and the future of Hawaiian honeycreepers
[No abstract available]
Authors
C. T. Atkinson, D.A. Lapointe
Larval habitat for the avian malaria vector culex quinquefasciatus (Diptera: Culicidae) in altered mid-elevation mesic-dry forests in Hawai'i Larval habitat for the avian malaria vector culex quinquefasciatus (Diptera: Culicidae) in altered mid-elevation mesic-dry forests in Hawai'i
Effective management of avian malaria (Plasmodium relictum) in Hawai'i's endemic honeycreepers (Drepanidinae) requires the identification and subsequent reduction or treatment of larval habitat for the mosquito vector, Culex quinquefasciatus (Diptera: Culicidae). We conducted ground surveys, treehole surveys, and helicopter aerial surveys from 20012003 to identify all potential larval...
Authors
M.E. Reiter, D.A. Lapointe
Science and Products
Filter Total Items: 52
Modeling future conservation of Hawaiian Honeycreepers by mosquito management and translocation of disease-tolerant Amakihi Modeling future conservation of Hawaiian Honeycreepers by mosquito management and translocation of disease-tolerant Amakihi
Avian malaria is an important cause of the decline of endemic Hawaiian honeycreepers. Because of the complexity of this disease system we used a computer model of avian malaria in forest birds to evaluate how two proposed conservation strategies: 1) reduction of habitat for mosquito larvae and 2) establishment of a low-elevation, malaria-tolerant honeycreeper (Hawaii Amakihi) to mid...
Authors
Peter Hobbelen, Michael Samuel, Dennis Lapointe, Carter Atkinson
Ecology and conservation biology of avian malaria Ecology and conservation biology of avian malaria
Avian malaria is a worldwide mosquito-borne disease caused by Plasmodium parasites. These parasites occur in many avian species but primarily affect passerine birds that have not evolved with the parasite. Host pathogenicity, fitness, and population impacts are poorly understood. In contrast to continental species, introduced avian malaria poses a substantial threat to naive birds on...
Authors
Dennis LaPointe, Carter Atkinson, Michael Samuel
Analysis of the trap gene provides evidence for the role of elevation and vector abundance in the genetic diversity of Plasmodium relictum in Hawaii Analysis of the trap gene provides evidence for the role of elevation and vector abundance in the genetic diversity of Plasmodium relictum in Hawaii
Background: The avian disease system in Hawaii offers an ideal opportunity to investigate host-pathogen interactions in a natural setting. Previous studies have recognized only a single mitochondrial lineage of avian malaria (Plasmodium relictum) in the Hawaiian Islands, but cloning and sequencing of nuclear genes suggest a higher degree of genetic diversity. Methods: In order to...
Authors
Margaret Farias, Carter Atkinson, Dennis LaPointe, Susan Jarvi
Keeping Hawai’i’s forest birds one step ahead of avian diseases in a warming world: a focus on Hakalau Forest National Wildlife Refuge. A case study from the National Conservation and Training Center Structured Decision Making Workshop Keeping Hawai’i’s forest birds one step ahead of avian diseases in a warming world: a focus on Hakalau Forest National Wildlife Refuge. A case study from the National Conservation and Training Center Structured Decision Making Workshop
This report is a product of a one-week workshop on using Structured Decision Making to identify and prioritize conservation actions to address the threat of climate change on Hawaii‟s native forest bird community. Specifically, t his report addresses the issue of global warming ‟s likely role in increasing disease prevalence in upper elevation forests of Hawaii, negatively impacting...
Authors
Eben H. Paxton, Jeff Burgett, Eve McDonald-Fadden, Ellen Bean, Carter Atkinson, Donna Ball, Colleen Cole, Lisa H. Crampton, Jim Kraus, Dennis LaPointe, Loyal Mehrhoff, Michael Samuel, Donna Brewer, Sarah Converse, Steve Morey
The dynamics, transmission, and population impacts of avian malaria in native hawaiian birds: A modeling approach The dynamics, transmission, and population impacts of avian malaria in native hawaiian birds: A modeling approach
We developed an epidemiological model of avian malaria (Plasmodium relictum) across an altitudinal gradient on the island of Hawaii that includes the dynamics of the host, vector, and parasite. This introduced mosquito‐borne disease is hypothesized to have contributed to extinctions and major shifts in the altitudinal distribution of highly susceptible native forest birds. Our goal was...
Authors
Michael Samuel, P.H.F. Hobbelen, F. Decastro, Jorge Ahumada, Dennis Lapointe, Carter Atkinson, Bethany Woodworth, P.J. Hart, D.C. Duffy
Thermal constraints to the sporogonic development and altitudinal distribution of avian malaria Plasmodium relictum in Hawai'i Thermal constraints to the sporogonic development and altitudinal distribution of avian malaria Plasmodium relictum in Hawai'i
More than half of the Hawaiian honeycreepers (Drepanidinae) known from historical records are now extinct. Introduced mosquito-borne disease, in particular the avian malaria Plasmodium relictum, has been incriminated as a leading cause of extinction during the 20th century and a major limiting factor in the recovery of remaining species populations. Today, most native Hawaiian bird...
Authors
Dennis Lapointe, M.L. Goff, Carter Atkinson
Taqman Real-Time PCR Detects Avipoxvirus DNA in Blood of Hawaìi `Amakihi (Hemignathus virens) Taqman Real-Time PCR Detects Avipoxvirus DNA in Blood of Hawaìi `Amakihi (Hemignathus virens)
Background Avipoxvirus sp. is a significant threat to endemic bird populations on several groups of islands worldwide, including Hawaìi, the Galapagos Islands, and the Canary Islands. Accurate identification and genotyping of Avipoxvirus is critical to the study of this disease and how it interacts with other pathogens, but currently available methods rely on invasive sampling of pox...
Authors
Margaret Farias, Dennis LaPointe, C. Atkinson, Christopher Czerwonka, Rajesh Shrestha, Susan Jarvi
Knemidokoptic mange in Hawai`i `Amakihi (Hemignathus virens) on the island of Hawai`i Knemidokoptic mange in Hawai`i `Amakihi (Hemignathus virens) on the island of Hawai`i
Lesions resembling knemidokoptic mange on the feet and tarsometatarsi of two Hawai`i `Amakihi (Hemignathus virens) were observed while the researchers were mist-netting wild passerines at Manuka Natural Area Reserve on the island of Hawai`i between 14 June 2007 and 19 June 2007. During subsequent mist-netting from September 2007 through February 2008, we found 26% (7/27) of the Hawai`i...
Authors
Jacqueline Gaudioso, Dennis Lapointe, Patrick Hart
Introduced avian diseases, climate change, and the future of Hawaiian honeycreepers Introduced avian diseases, climate change, and the future of Hawaiian honeycreepers
[No abstract available]
Authors
C. T. Atkinson, D.A. Lapointe
Larval habitat for the avian malaria vector culex quinquefasciatus (Diptera: Culicidae) in altered mid-elevation mesic-dry forests in Hawai'i Larval habitat for the avian malaria vector culex quinquefasciatus (Diptera: Culicidae) in altered mid-elevation mesic-dry forests in Hawai'i
Effective management of avian malaria (Plasmodium relictum) in Hawai'i's endemic honeycreepers (Drepanidinae) requires the identification and subsequent reduction or treatment of larval habitat for the mosquito vector, Culex quinquefasciatus (Diptera: Culicidae). We conducted ground surveys, treehole surveys, and helicopter aerial surveys from 20012003 to identify all potential larval...
Authors
M.E. Reiter, D.A. Lapointe