Dawn Dittman - Academia.edu (original) (raw)

Papers by Dawn Dittman

Research paper thumbnail of Growth differences in oysters, Crassostrea virginica, from different estuaries

Research paper thumbnail of Effects of Perkinsus marinus on reproduction and condition of the eastern oyster, Crassostrea virginica, depend on timing

Journal of Shellfish Research

Research paper thumbnail of Recovery and Decline of Lake Whitefish in U.S. Waters of Eastern Lake Ontario, 1980-2001

... predation on young-of-the-year (YOY) whitefish by the exotic rainbow smelt (Osmerus mordax, h... more ... predation on young-of-the-year (YOY) whitefish by the exotic rainbow smelt (Osmerus mordax, hereafter, smelt)(Warner and Fenderson 1963; Bergstedt 1983; Evans and Loftus 1987), and perhaps degradation of water quality (Christie 1973; Hoyle et al., 2003; Owens et al ...

Research paper thumbnail of An investigation of the bactericidal activity of selected essential oils to Aeromonas spp

Journal of Advanced Research, 2015

Research paper thumbnail of Reference intervals for select hematologic and plasma biochemical analytes of wild Lake Sturgeon ( Acipenser fulvescens ) from the St. Lawrence River in New York

Veterinary Clinical Pathology, 2013

Lake Sturgeon (Acipenser fulvescens) is a long-lived freshwater fish distributed throughout the G... more Lake Sturgeon (Acipenser fulvescens) is a long-lived freshwater fish distributed throughout the Great Lakes region and is a threatened species in New York State. The species' unique life cycle makes it useful as an indicator of ecosystem health, and efforts to repatriate Lake Sturgeon to their historic range are underway. However, comprehensive hematologic and biochemical reference intervals that would be valuable for assessing the health status of individual animals have not been reported. The objective of this study was to determine normal hematologic and plasma biochemical reference intervals for healthy wild Lake Sturgeon. Blood samples were collected from 52 wild Lake Sturgeon caught in gill nets in the St. Lawrence River. Heparinized whole blood and plasma samples were analyzed using standard techniques. Reference intervals were calculated using the robust method following elimination of outliers and Box-Cox transformation of data. Hematologic reference intervals were as follows: PCV 17-38%, estimated WBC count 2740-23,150/μL, neutrophils 193-6121/μL, eosinophils 0-558/μL, other granulocytes/heterophils 0-488/μL, lymphocytes 1447-14,044/μL, and monocytes 55-1684/μL. Plasma biochemical reference intervals were as follows: aspartate aminotransferase 333-1746 U/L, calcium 1.85-2.80 mmol/L, chloride 95-123 mmol/L, creatine kinase 776-35,536 U/L, glucose 2.94-14.76 mmol/L, glutamate dehydrogenase 6-30 U/L, phosphate 2.03-5.81 mmol/L, potassium 2.34-4.24 mmol/L, sodium 122.9-151.1 mmol/L, total protein 2.0-4.4 g/dL, triglycerides 1.07-5.12 mmol/L, and uric acid 1-251 μmol/L. Reference intervals reported here will be useful for health assessment of wild and repatriated Lake Sturgeon.

Research paper thumbnail of Anthropogenic Impacts on American Eel Demographics in Hudson River Tributaries, New York

Transactions of the American Fisheries Society, 2007

Research paper thumbnail of Habitat Selection and Spawning Success of Walleyes in a Tributary to Owasco Lake, New York

North American Journal of Fisheries Management, 2010

Research paper thumbnail of Growth patterns in oysters, Crassostrea virginica , from different estuaries

Research paper thumbnail of Comparison of Select Hematology and Serum Chemistry Analtyes Between Wild-Caught and Aquarium-Housed Lake Sturgeon ( Acipenser Fulvescens )

Journal of Zoo and Wildlife Medicine, 2013

Hematology and serum chemistry analytes were compared between wild-caught and aquarium-housed lak... more Hematology and serum chemistry analytes were compared between wild-caught and aquarium-housed lake sturgeon (Acipenser fulvescens) to potentially improve understanding of medical issues in lake sturgeon. Blood samples were taken from 30 lake sturgeon exhibited in 11 institutions in the United States and from 23 experimentally stocked lake sturgeon caught in gill nets in the lower Genesee River in Rochester, New York, USA. For hematology, only segmented neutrophil count was significantly different, with wild-caught fish having a higher number of circulating neutrophils. For clinical chemistry analytes, chloride, uric acid, calcium, phosphate, glucose, aspartate aminotransferase, triglycerides, and creatine kinase were significantly different between the two cohorts. These differences are likely not clinically significant and are attributable to handling stress, variability in environmental parameters, or differences in nutritional status. This is the first report of hematology and serum chemistry values in aquarium-housed lake sturgeon and provides useful reference intervals for clinicians.

Research paper thumbnail of Diel variation of intertidal foraging by Cancer productus L. in British Columbia

Journal of Natural History, 1989

... removed from the holding tanks, carapace widths measured, the water allowed to drain from the... more ... removed from the holding tanks, carapace widths measured, the water allowed to drain from the outer shell and gill cavities, and ... Discussion Previous studies (Prasad and Tampi, 1951; Cleaver, 1949; Knudsen, 1964; Haefner, 1976, 1977) report segregation of sizes in portunid ...

Research paper thumbnail of Radular Production Rates in Two Species of Lacuna Turton (Gastropoda: Littorinidae)

Journal of Molluscan Studies, 1996

Research paper thumbnail of Occurrence and Food Habits of the Round Goby in the Profundal Zone of Southwestern Lake Ontario

Journal of Great Lakes Research, 2007

Research paper thumbnail of Storm-induced Redistribution of Deepwater Sediments in Lake Ontario

Journal of Great Lakes Research, 2006

Research paper thumbnail of Interactions between invasive round gobies ( Neogobius melanostomus ) and fantail darters ( Etheostoma flabellare ) in a tributary of the St. Lawrence River, New York, USA

Journal of Freshwater Ecology, 2013

ABSTRACT The initial, rapid expansion of the invasive round goby (Neogobius melanostomus) through... more ABSTRACT The initial, rapid expansion of the invasive round goby (Neogobius melanostomus) throughout the Great Lakes drainage was largely confined to lentic systems. We recently observed round gobies ascending two tributaries of the St. Lawrence River. The expansion of gobies into small lotic environments may place ecologically similar species at risk. Fantail darter (Etheostoma flabellare) is one of the several benthic species of the New York Great Lakes drainages that are threatened by round goby invasion. We examined the habitat use and diet composition of fantail darters and round gobies in Mullet Creek, a third-order tributary of the St. Lawrence River, NY, USA. The objectives of this study were to determine the degree of habitat and diet overlap between fantail darters and round gobies in a tributary of the St. Lawrence River. Gobies and darters co-occurred at 22% of capture sites. Of the four habitat variables examined (cover, depth, substrate and velocity), only depth use was significantly different with gobies using deeper habitats than darters. Among the two species and size classes sampled (large vs. small), large darters had the most restricted habitat use requirements. There was variation in round goby and darter diet composition, but only moderate diet overlap occurred between fantail darters and round gobies (Cλ = 0.43). Conditions in Mullet Creek were appropriate for the evaluation of possible spatial and dietary competition between round goby and native darters. Early detection and management of round goby invasions is critical to maintaining ecological integrity of lotic ecosystems in the St. Lawrence Valley.

Research paper thumbnail of Fall diel diet composition of American eel ( Anguilla rostrata ) in a tributary of the Hudson River, New York, USA

Journal of Freshwater Ecology, 2013

ABSTRACT American eel (Anguilla rostrata), a once common species, is now in decline throughout mu... more ABSTRACT American eel (Anguilla rostrata), a once common species, is now in decline throughout much of its native range in North America. There is little information on the role of American eel in river food webs. A better understanding of the diet and ecological role of American eel will help in the conservation of this important species. During autumn 2009, eel and aquatic invertebrate samples were collected from Hannacroix Creek, a tributary of the Hudson River, in Albany and Greene counties, New York, USA. Eel diet was analyzed by the eel size and time period (day or night). A high proportion of eel stomachs were empty (73%). Eel diets varied among size classes and day and night feeding periods (p = 0.001). Diet overlap was significant between small and medium eels caught both during the day (α = 0.71) and at night (α = 0.84). Nocturnal diet and nocturnal invertebrate samples were similar (α = 0.65), indicating a preference for bottom feeding during the night. Mayfly nymphs were the major prey consumed in each period by all size classes. Among eels that fed, night-feeding eels had the greatest stomach weight (as a percent of total body weight). The swim-bladder parasite, Anguillicoloides crassus, was also observed in eels of all size classes with nearly 50% afflicted.

Research paper thumbnail of Effect of Algal Epiphytes on the Mussel Mytilus Californianus

Ecology, 1991

... Vance (1978) found that epibionts on the bivalve Chama pellucida de-creased the probability t... more ... Vance (1978) found that epibionts on the bivalve Chama pellucida de-creased the probability that the host would be detected by ... The frequencies of survivorship among treatment groups were analyzed using chi-square goodness-of-fit tests applied to a hierarchical series of ...

Research paper thumbnail of Shifts in the Diets of Slimy Sculpin ( Cottus cognatus ) and Lake Whitefish ( Coregonus clupeaformis ) in Lake Ontario Following the Collapse of the Burrowing Amphipod Diporeia

Aquatic Ecosystem Health & Management, 2003

ABSTRACT

Research paper thumbnail of Distribution of Lake Sturgeon in New York: 11 Years of Restoration Management

The American Midland Naturalist, 2011

Research paper thumbnail of Efficacy of Iodine for Disinfection of Lake Sturgeon Eggs from the St. Lawrence River, New York

North American Journal of Aquaculture, 2014

Research paper thumbnail of Spread of released Lake Sturgeon: Oswego River basin NY

As part of an ongoing program to restore lake sturgeon (Acipenser fulvescens) in New York, hatche... more As part of an ongoing program to restore lake sturgeon (Acipenser fulvescens) in New York, hatchery-produced juveniles have been stocked into Oneida (8,127) and Cayuga (3,752) lakes, 1995-2004. Release of juveniles as a restoration strategy assumes movement into available suitable habitat. This part of the New York Canal system consists largely of a highly altered barge canal, with the majority habitat consisting of relatively homogenous depths, substrates maintained by regular dredging, and somewhat degraded water quality. Migration of these fish into the Seneca and Oswego Rivers ( Oswego and Erie Canals) is documented. Measurable local populations appear to be developing in the system upstream and downstream of barriers (lock/dam complexes). The 2009 average size in the Seneca River was 1.21 m and 9.03 kg. In the Oswego River it was 1.3 m and 11.94 kg. The sizes and size distributions of these relatively young fish are contrasted with that of similar age sturgeon in other systems....

Research paper thumbnail of Growth differences in oysters, Crassostrea virginica, from different estuaries

Research paper thumbnail of Effects of Perkinsus marinus on reproduction and condition of the eastern oyster, Crassostrea virginica, depend on timing

Journal of Shellfish Research

Research paper thumbnail of Recovery and Decline of Lake Whitefish in U.S. Waters of Eastern Lake Ontario, 1980-2001

... predation on young-of-the-year (YOY) whitefish by the exotic rainbow smelt (Osmerus mordax, h... more ... predation on young-of-the-year (YOY) whitefish by the exotic rainbow smelt (Osmerus mordax, hereafter, smelt)(Warner and Fenderson 1963; Bergstedt 1983; Evans and Loftus 1987), and perhaps degradation of water quality (Christie 1973; Hoyle et al., 2003; Owens et al ...

Research paper thumbnail of An investigation of the bactericidal activity of selected essential oils to Aeromonas spp

Journal of Advanced Research, 2015

Research paper thumbnail of Reference intervals for select hematologic and plasma biochemical analytes of wild Lake Sturgeon ( Acipenser fulvescens ) from the St. Lawrence River in New York

Veterinary Clinical Pathology, 2013

Lake Sturgeon (Acipenser fulvescens) is a long-lived freshwater fish distributed throughout the G... more Lake Sturgeon (Acipenser fulvescens) is a long-lived freshwater fish distributed throughout the Great Lakes region and is a threatened species in New York State. The species' unique life cycle makes it useful as an indicator of ecosystem health, and efforts to repatriate Lake Sturgeon to their historic range are underway. However, comprehensive hematologic and biochemical reference intervals that would be valuable for assessing the health status of individual animals have not been reported. The objective of this study was to determine normal hematologic and plasma biochemical reference intervals for healthy wild Lake Sturgeon. Blood samples were collected from 52 wild Lake Sturgeon caught in gill nets in the St. Lawrence River. Heparinized whole blood and plasma samples were analyzed using standard techniques. Reference intervals were calculated using the robust method following elimination of outliers and Box-Cox transformation of data. Hematologic reference intervals were as follows: PCV 17-38%, estimated WBC count 2740-23,150/μL, neutrophils 193-6121/μL, eosinophils 0-558/μL, other granulocytes/heterophils 0-488/μL, lymphocytes 1447-14,044/μL, and monocytes 55-1684/μL. Plasma biochemical reference intervals were as follows: aspartate aminotransferase 333-1746 U/L, calcium 1.85-2.80 mmol/L, chloride 95-123 mmol/L, creatine kinase 776-35,536 U/L, glucose 2.94-14.76 mmol/L, glutamate dehydrogenase 6-30 U/L, phosphate 2.03-5.81 mmol/L, potassium 2.34-4.24 mmol/L, sodium 122.9-151.1 mmol/L, total protein 2.0-4.4 g/dL, triglycerides 1.07-5.12 mmol/L, and uric acid 1-251 μmol/L. Reference intervals reported here will be useful for health assessment of wild and repatriated Lake Sturgeon.

Research paper thumbnail of Anthropogenic Impacts on American Eel Demographics in Hudson River Tributaries, New York

Transactions of the American Fisheries Society, 2007

Research paper thumbnail of Habitat Selection and Spawning Success of Walleyes in a Tributary to Owasco Lake, New York

North American Journal of Fisheries Management, 2010

Research paper thumbnail of Growth patterns in oysters, Crassostrea virginica , from different estuaries

Research paper thumbnail of Comparison of Select Hematology and Serum Chemistry Analtyes Between Wild-Caught and Aquarium-Housed Lake Sturgeon ( Acipenser Fulvescens )

Journal of Zoo and Wildlife Medicine, 2013

Hematology and serum chemistry analytes were compared between wild-caught and aquarium-housed lak... more Hematology and serum chemistry analytes were compared between wild-caught and aquarium-housed lake sturgeon (Acipenser fulvescens) to potentially improve understanding of medical issues in lake sturgeon. Blood samples were taken from 30 lake sturgeon exhibited in 11 institutions in the United States and from 23 experimentally stocked lake sturgeon caught in gill nets in the lower Genesee River in Rochester, New York, USA. For hematology, only segmented neutrophil count was significantly different, with wild-caught fish having a higher number of circulating neutrophils. For clinical chemistry analytes, chloride, uric acid, calcium, phosphate, glucose, aspartate aminotransferase, triglycerides, and creatine kinase were significantly different between the two cohorts. These differences are likely not clinically significant and are attributable to handling stress, variability in environmental parameters, or differences in nutritional status. This is the first report of hematology and serum chemistry values in aquarium-housed lake sturgeon and provides useful reference intervals for clinicians.

Research paper thumbnail of Diel variation of intertidal foraging by Cancer productus L. in British Columbia

Journal of Natural History, 1989

... removed from the holding tanks, carapace widths measured, the water allowed to drain from the... more ... removed from the holding tanks, carapace widths measured, the water allowed to drain from the outer shell and gill cavities, and ... Discussion Previous studies (Prasad and Tampi, 1951; Cleaver, 1949; Knudsen, 1964; Haefner, 1976, 1977) report segregation of sizes in portunid ...

Research paper thumbnail of Radular Production Rates in Two Species of Lacuna Turton (Gastropoda: Littorinidae)

Journal of Molluscan Studies, 1996

Research paper thumbnail of Occurrence and Food Habits of the Round Goby in the Profundal Zone of Southwestern Lake Ontario

Journal of Great Lakes Research, 2007

Research paper thumbnail of Storm-induced Redistribution of Deepwater Sediments in Lake Ontario

Journal of Great Lakes Research, 2006

Research paper thumbnail of Interactions between invasive round gobies ( Neogobius melanostomus ) and fantail darters ( Etheostoma flabellare ) in a tributary of the St. Lawrence River, New York, USA

Journal of Freshwater Ecology, 2013

ABSTRACT The initial, rapid expansion of the invasive round goby (Neogobius melanostomus) through... more ABSTRACT The initial, rapid expansion of the invasive round goby (Neogobius melanostomus) throughout the Great Lakes drainage was largely confined to lentic systems. We recently observed round gobies ascending two tributaries of the St. Lawrence River. The expansion of gobies into small lotic environments may place ecologically similar species at risk. Fantail darter (Etheostoma flabellare) is one of the several benthic species of the New York Great Lakes drainages that are threatened by round goby invasion. We examined the habitat use and diet composition of fantail darters and round gobies in Mullet Creek, a third-order tributary of the St. Lawrence River, NY, USA. The objectives of this study were to determine the degree of habitat and diet overlap between fantail darters and round gobies in a tributary of the St. Lawrence River. Gobies and darters co-occurred at 22% of capture sites. Of the four habitat variables examined (cover, depth, substrate and velocity), only depth use was significantly different with gobies using deeper habitats than darters. Among the two species and size classes sampled (large vs. small), large darters had the most restricted habitat use requirements. There was variation in round goby and darter diet composition, but only moderate diet overlap occurred between fantail darters and round gobies (Cλ = 0.43). Conditions in Mullet Creek were appropriate for the evaluation of possible spatial and dietary competition between round goby and native darters. Early detection and management of round goby invasions is critical to maintaining ecological integrity of lotic ecosystems in the St. Lawrence Valley.

Research paper thumbnail of Fall diel diet composition of American eel ( Anguilla rostrata ) in a tributary of the Hudson River, New York, USA

Journal of Freshwater Ecology, 2013

ABSTRACT American eel (Anguilla rostrata), a once common species, is now in decline throughout mu... more ABSTRACT American eel (Anguilla rostrata), a once common species, is now in decline throughout much of its native range in North America. There is little information on the role of American eel in river food webs. A better understanding of the diet and ecological role of American eel will help in the conservation of this important species. During autumn 2009, eel and aquatic invertebrate samples were collected from Hannacroix Creek, a tributary of the Hudson River, in Albany and Greene counties, New York, USA. Eel diet was analyzed by the eel size and time period (day or night). A high proportion of eel stomachs were empty (73%). Eel diets varied among size classes and day and night feeding periods (p = 0.001). Diet overlap was significant between small and medium eels caught both during the day (α = 0.71) and at night (α = 0.84). Nocturnal diet and nocturnal invertebrate samples were similar (α = 0.65), indicating a preference for bottom feeding during the night. Mayfly nymphs were the major prey consumed in each period by all size classes. Among eels that fed, night-feeding eels had the greatest stomach weight (as a percent of total body weight). The swim-bladder parasite, Anguillicoloides crassus, was also observed in eels of all size classes with nearly 50% afflicted.

Research paper thumbnail of Effect of Algal Epiphytes on the Mussel Mytilus Californianus

Ecology, 1991

... Vance (1978) found that epibionts on the bivalve Chama pellucida de-creased the probability t... more ... Vance (1978) found that epibionts on the bivalve Chama pellucida de-creased the probability that the host would be detected by ... The frequencies of survivorship among treatment groups were analyzed using chi-square goodness-of-fit tests applied to a hierarchical series of ...

Research paper thumbnail of Shifts in the Diets of Slimy Sculpin ( Cottus cognatus ) and Lake Whitefish ( Coregonus clupeaformis ) in Lake Ontario Following the Collapse of the Burrowing Amphipod Diporeia

Aquatic Ecosystem Health & Management, 2003

ABSTRACT

Research paper thumbnail of Distribution of Lake Sturgeon in New York: 11 Years of Restoration Management

The American Midland Naturalist, 2011

Research paper thumbnail of Efficacy of Iodine for Disinfection of Lake Sturgeon Eggs from the St. Lawrence River, New York

North American Journal of Aquaculture, 2014

Research paper thumbnail of Spread of released Lake Sturgeon: Oswego River basin NY

As part of an ongoing program to restore lake sturgeon (Acipenser fulvescens) in New York, hatche... more As part of an ongoing program to restore lake sturgeon (Acipenser fulvescens) in New York, hatchery-produced juveniles have been stocked into Oneida (8,127) and Cayuga (3,752) lakes, 1995-2004. Release of juveniles as a restoration strategy assumes movement into available suitable habitat. This part of the New York Canal system consists largely of a highly altered barge canal, with the majority habitat consisting of relatively homogenous depths, substrates maintained by regular dredging, and somewhat degraded water quality. Migration of these fish into the Seneca and Oswego Rivers ( Oswego and Erie Canals) is documented. Measurable local populations appear to be developing in the system upstream and downstream of barriers (lock/dam complexes). The 2009 average size in the Seneca River was 1.21 m and 9.03 kg. In the Oswego River it was 1.3 m and 11.94 kg. The sizes and size distributions of these relatively young fish are contrasted with that of similar age sturgeon in other systems....