Patrick Hudson is a Scientist Emeritus based in Ann Arbor, MI.
Science and Products
Publications by this scientist
Filter Total Items: 39
Importance of nonindigenous harpacticoids (Crustacea: Copepoda) decrease with depth in Lake Ontario
Harpacticoid copepods can be a substantial component of the meiobenthic community in lakes and serve an ecological role as detritivores. Here we present the first species-level lake-wide quantitative assessment of the harpacticoid assemblage of Lake Ontario with emphasis on the status of nonindigenous species. Additionally, we provide COI-5P sequences of harpacticoid taxa through Barcode of Life D
Authors
Joe K. Connolly, Brian O'Malley, Patrick Hudson, James M. Watkins, Lyubov E. Burlakova, Lars G. Rudstam
First record of the non-indigenous parasitic copepod Neoergasilus japonicus (Harada, 1950) in the Lake Ontario Watershed: Oneida Lake, New York
Four specimens of the Asiatic parasitic copepod Neoergasilus japonicus (Harada, 1930) were collected from Oneida Lake, New York in September 2018; one specimen was from a white sucker Catostomus commersonii, another from a green sunfish Lepomis cyanellus, and two from a bluegill Lepomis macrochirus. The four adult female specimens were found attached to the base of the gills of their respective ho
Authors
Chris C. Marshall, Patrick Hudson, J. Randy Jackson, Joe K. Connolly, Jim M Watkins, Lars G. Rudstam
Eurytemora carolleeae in the Laurentian Great Lakes revealed by phylogenetic and morphological analysis
In the Laurentian Great Lakes, specimens of Eurytemora have been reported asEurytemora affinis since its invasion in the late 1950s. During an intensive collection of aquatic invertebrates for morphological and molecular identification in Western Lake Erie in 2012-2013, several specimens of Eurytemora were collected. Analysis of these specimens identified them as the recently described species Eur
Authors
Adrian A. Vasquez, Patrick L. Hudson, Masanori Fujimoto, Kevin M. Keeler, Patricia M. Armenio, Jeffrey L. Ram
Observations of cocooned Hydrobaenus (Diptera: Chironomidae) larvae in Lake Michigan
Larvae of the family Chironomidae have developed a variety of ways to tolerate environmental stress, including the formation of cocoons, which allows larvae to avoid unfavorable temperature conditions, drought, or competition with other chironomids. Summer cocoon formation by younger instars of the genus Hydrobaenus Fries allows persistence through increased temperatures and/or intermittent dry pe
Authors
Taaja R. Tucker, Patrick L. Hudson, Stephen Riley
Morphological identification and COI barcodes of adult flies help determine species identities of chironomid larvae (Diptera, Chironomidae)
Establishing reliable methods for the identification of benthic chironomid communities is important due to their significant contribution to biomass, ecology and the aquatic food web. Immature larval specimens are more difficult to identify to species level by traditional morphological methods than their fully developed adult counterparts, and few keys are available to identify the larval species.
Authors
Andrew Joseph Failla, Adrian Amelio Vasquez, Patrick L. Hudson, Masanori Fujimoto, Jeffrey L. Ram
Distribution and abundance of caddisflies (Trichoptera) in the St. Clair-Detroit River system
Abundance and distribution patterns of the caddisflies of the St. Clair-Detroit River system were investigated in 1983–84. Collections of both adults and larvae yielded 70 species representing 34 genera and 12 families. Leptoceridae and Hydroptilidae were the most common families and Ceraclea the most common genus in number of species. This study adds 21 species to the Michigan record. The hydrops
Authors
Bruce M. Davis, Patrick L. Hudson, Brian J. Armitage
Additions to the aquatic diptera (Chaoboridae, Chironomidae, Culicidae, Tabanidae, Tipulidae) fauna of the White River National Wildlife Refuge, Arkansas
The dipteran fauna of Arkansas is generally poorly known. A previous study of the Aquatic macroinvertebrates of the White River National Wildlife Refuge, the largest refuge in Arkansas, reported only 12 diptera taxa out of 219 taxa collected (Chordas et al., 1996). Most of the dipterans from this study were identified only to the family level. The family Chironomidae is a large, diverse group a
Authors
Stephen W. Chordas, Patrick L. Hudson, Eric G. Chapman
Habitat selection by two species of burrowing mayfly nymphs in the Les Cheneaux Islands region of northern Lake Huron
This study focused primarily on the habitat preferences of Hexagenia limbata andEphemera simulans, two species prevalent in northern Lake Huron, to gain a better understanding of the key components that determined their distribution and abundance. Both species preferred habitats based upon depth and sediment type. In addition, the burrowing activity of H. limbata was examined using in-situ, underw
Authors
Marc A. Blouin, Patrick Hudson, Margret Chriscinske
Occurrence of Ergasilus megaceros Wilson, 1916, in the sea lamprey and other fishes from North America
Ergasilus megaceros (Copepoda: Ergasilidae) was recovered from the nasal fossae (lamellae) of the olfactory sac in 1 (1.8%) of 56 sea lampreys, Petromyzon marinus Linne, 1758, collected in May 2002 from the Cheboygan River, Michigan. Although the sea lamprey is a new host record for E. megaceros, this fish species may not be a preferred host because of its low prevalence. Ergasilus megaceros is th
Authors
Patrick M. Muzzall, Patrick L. Hudson
The Oligochaeta (Annelida, Clitellata) of the St. Lawrence Great Lakes region: An update
An updated oligochaete species list for the Great Lakes region is provided. The list was developed through the reexamination of the taxa reported in a previous report in 1980, addition of new taxa or records collected from the region since 1980, and an update of taxonomy commensurate with systematic and nomenclatural changes over the intervening years since the last review. The authors found 74 pa
Authors
Douglas R. Spencer, Patrick L. Hudson
Hydrologic variability and the application of Index of Biotic Integrity metrics to wetlands: a Great Lakes evaluation
Interest by land-management and regulatory agencies in using biological indicators to detect wetland degradation, coupled with ongoing use of this approach to assess water quality in streams, led to the desire to develop and evaluate an Index of Biotic Integrity (IBI) for wetlands that could be used to categorize the level of degradation. We undertook this challenge with data from coastal wetlands
Authors
Douglas A. Wilcox, James E. Meeker, Patrick L. Hudson, Brian J. Armitage, M. Glen Black, Donald G. Uzarski
First record of Neoergasilus japonicus (Poecilostomatoida: Ergasilidae), a parasitic copepod new to the Laurentian Great Lakes
The parasitic copepod Neoergasilus japonicus, native to eastern Asia, was first collected from 4 species of fish (fathead minnow, Pimephales promelas; largemouth bass, Micropterus salmoides; pumpkinseed sunfish, Lepomis gibbosus; and yellow perch, Perca flavescens) in July 1994 in Saginaw Bay, Lake Huron, Michigan. Further sampling in the bay in 2001 revealed infections on 7 additional species (bl
Authors
Patrick L. Hudson, Charles A. Bowen
Science and Products
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Publications by this scientist
Filter Total Items: 39Importance of nonindigenous harpacticoids (Crustacea: Copepoda) decrease with depth in Lake Ontario
Harpacticoid copepods can be a substantial component of the meiobenthic community in lakes and serve an ecological role as detritivores. Here we present the first species-level lake-wide quantitative assessment of the harpacticoid assemblage of Lake Ontario with emphasis on the status of nonindigenous species. Additionally, we provide COI-5P sequences of harpacticoid taxa through Barcode of Life DAuthorsJoe K. Connolly, Brian O'Malley, Patrick Hudson, James M. Watkins, Lyubov E. Burlakova, Lars G. RudstamFirst record of the non-indigenous parasitic copepod Neoergasilus japonicus (Harada, 1950) in the Lake Ontario Watershed: Oneida Lake, New York
Four specimens of the Asiatic parasitic copepod Neoergasilus japonicus (Harada, 1930) were collected from Oneida Lake, New York in September 2018; one specimen was from a white sucker Catostomus commersonii, another from a green sunfish Lepomis cyanellus, and two from a bluegill Lepomis macrochirus. The four adult female specimens were found attached to the base of the gills of their respective hoAuthorsChris C. Marshall, Patrick Hudson, J. Randy Jackson, Joe K. Connolly, Jim M Watkins, Lars G. RudstamEurytemora carolleeae in the Laurentian Great Lakes revealed by phylogenetic and morphological analysis
In the Laurentian Great Lakes, specimens of Eurytemora have been reported asEurytemora affinis since its invasion in the late 1950s. During an intensive collection of aquatic invertebrates for morphological and molecular identification in Western Lake Erie in 2012-2013, several specimens of Eurytemora were collected. Analysis of these specimens identified them as the recently described species EurAuthorsAdrian A. Vasquez, Patrick L. Hudson, Masanori Fujimoto, Kevin M. Keeler, Patricia M. Armenio, Jeffrey L. RamObservations of cocooned Hydrobaenus (Diptera: Chironomidae) larvae in Lake Michigan
Larvae of the family Chironomidae have developed a variety of ways to tolerate environmental stress, including the formation of cocoons, which allows larvae to avoid unfavorable temperature conditions, drought, or competition with other chironomids. Summer cocoon formation by younger instars of the genus Hydrobaenus Fries allows persistence through increased temperatures and/or intermittent dry peAuthorsTaaja R. Tucker, Patrick L. Hudson, Stephen RileyMorphological identification and COI barcodes of adult flies help determine species identities of chironomid larvae (Diptera, Chironomidae)
Establishing reliable methods for the identification of benthic chironomid communities is important due to their significant contribution to biomass, ecology and the aquatic food web. Immature larval specimens are more difficult to identify to species level by traditional morphological methods than their fully developed adult counterparts, and few keys are available to identify the larval species.AuthorsAndrew Joseph Failla, Adrian Amelio Vasquez, Patrick L. Hudson, Masanori Fujimoto, Jeffrey L. RamDistribution and abundance of caddisflies (Trichoptera) in the St. Clair-Detroit River system
Abundance and distribution patterns of the caddisflies of the St. Clair-Detroit River system were investigated in 1983–84. Collections of both adults and larvae yielded 70 species representing 34 genera and 12 families. Leptoceridae and Hydroptilidae were the most common families and Ceraclea the most common genus in number of species. This study adds 21 species to the Michigan record. The hydropsAuthorsBruce M. Davis, Patrick L. Hudson, Brian J. ArmitageAdditions to the aquatic diptera (Chaoboridae, Chironomidae, Culicidae, Tabanidae, Tipulidae) fauna of the White River National Wildlife Refuge, Arkansas
The dipteran fauna of Arkansas is generally poorly known. A previous study of the Aquatic macroinvertebrates of the White River National Wildlife Refuge, the largest refuge in Arkansas, reported only 12 diptera taxa out of 219 taxa collected (Chordas et al., 1996). Most of the dipterans from this study were identified only to the family level. The family Chironomidae is a large, diverse group aAuthorsStephen W. Chordas, Patrick L. Hudson, Eric G. ChapmanHabitat selection by two species of burrowing mayfly nymphs in the Les Cheneaux Islands region of northern Lake Huron
This study focused primarily on the habitat preferences of Hexagenia limbata andEphemera simulans, two species prevalent in northern Lake Huron, to gain a better understanding of the key components that determined their distribution and abundance. Both species preferred habitats based upon depth and sediment type. In addition, the burrowing activity of H. limbata was examined using in-situ, underwAuthorsMarc A. Blouin, Patrick Hudson, Margret ChriscinskeOccurrence of Ergasilus megaceros Wilson, 1916, in the sea lamprey and other fishes from North America
Ergasilus megaceros (Copepoda: Ergasilidae) was recovered from the nasal fossae (lamellae) of the olfactory sac in 1 (1.8%) of 56 sea lampreys, Petromyzon marinus Linne, 1758, collected in May 2002 from the Cheboygan River, Michigan. Although the sea lamprey is a new host record for E. megaceros, this fish species may not be a preferred host because of its low prevalence. Ergasilus megaceros is thAuthorsPatrick M. Muzzall, Patrick L. HudsonThe Oligochaeta (Annelida, Clitellata) of the St. Lawrence Great Lakes region: An update
An updated oligochaete species list for the Great Lakes region is provided. The list was developed through the reexamination of the taxa reported in a previous report in 1980, addition of new taxa or records collected from the region since 1980, and an update of taxonomy commensurate with systematic and nomenclatural changes over the intervening years since the last review. The authors found 74 paAuthorsDouglas R. Spencer, Patrick L. HudsonHydrologic variability and the application of Index of Biotic Integrity metrics to wetlands: a Great Lakes evaluation
Interest by land-management and regulatory agencies in using biological indicators to detect wetland degradation, coupled with ongoing use of this approach to assess water quality in streams, led to the desire to develop and evaluate an Index of Biotic Integrity (IBI) for wetlands that could be used to categorize the level of degradation. We undertook this challenge with data from coastal wetlandsAuthorsDouglas A. Wilcox, James E. Meeker, Patrick L. Hudson, Brian J. Armitage, M. Glen Black, Donald G. UzarskiFirst record of Neoergasilus japonicus (Poecilostomatoida: Ergasilidae), a parasitic copepod new to the Laurentian Great Lakes
The parasitic copepod Neoergasilus japonicus, native to eastern Asia, was first collected from 4 species of fish (fathead minnow, Pimephales promelas; largemouth bass, Micropterus salmoides; pumpkinseed sunfish, Lepomis gibbosus; and yellow perch, Perca flavescens) in July 1994 in Saginaw Bay, Lake Huron, Michigan. Further sampling in the bay in 2001 revealed infections on 7 additional species (blAuthorsPatrick L. Hudson, Charles A. Bowen