Papers by Ana Taraborelli
Journal of Great Lakes Research, 2009
Journal of Great Lakes Research, 2010
We compared round goby (Neogobius melanostomus) population structure and biomass, estimated the q... more We compared round goby (Neogobius melanostomus) population structure and biomass, estimated the quantity of prey consumed by round goby and assessed predation on round goby in two areas of the Bay of Quinte (upper and lower bay) that were invaded by this species two years apart. A bioenergetics approach was used to estimate round goby consumption and to illustrate the influence of changes in the round goby biomass, from May to October in both areas of the bay. Mean round goby biomass was 5 tonnes/km 2 for the upper bay and 11.2 tonnes/km 2 for the lower bay. Round goby populations were dominated by age-0 to age-2 individuals; older individuals were rare although they constituted a greater portion of total biomass in the earlier invaded lower bay than the upper bay. Estimated round goby consumption was 78.4 tonnes/km 2 for the upper bay and 127.1 tonnes/km 2 for the lower bay; dreissenids were the most important prey followed by chironomids, zooplankton and amphipods. Diet analysis showed that round gobies were consumed by all predator species analyzed, and constituted a high percentage of stomach content biomass in yellow perch (Perca flavescens), largemouth bass (Micropterus salmoides) and northern pike (Esox lucius). Age structure differences between the upper and lower bay are consistent with those expected between expanding and stable populations.
Journal of Great Lakes Research, 2012
Hemimysis anomala is one of the latest macroinvertebrates to invade the Laurentian Great Lakes. S... more Hemimysis anomala is one of the latest macroinvertebrates to invade the Laurentian Great Lakes. Since first reported in 2006, Hemimysis have been confirmed in several locations within the Great Lakes basin. However, little is known about the seasonal and spatial variation in demographics and dynamics of Hemimysis populations. We used a standardised pier-based methodology to describe the distribution of Hemimysis at 29 locations around the shoreline of Lake Ontario in 2009. Samples were collected in spring, summer, and fall at most locations, and biweekly at one site (Bronte Creek) over a 12-month period in 2009. For each site, we estimated abundance by sex and size. The more temporally intensive sampling at Bronte Creek enabled us to estimate production. Hemimysis were found at 83% of the sites visited, with densities generally highest in the northwest and lower at the other sites. Production estimates (2.67-14.09 mg dry weight•m − 2 •d − 1) were higher than that of other common zooplankton species in the Great Lakes. We provide important life history parameters that will help ecologists better understand the potential impacts of Hemimysis on Great Lakes ecosystems.
823 County Road 35, RR#2, Picton, Ontario, K0K 2T0 ◆ Phone: 613-476-7994 ◆ Fax: 613-476-0279 ◆ ww... more 823 County Road 35, RR#2, Picton, Ontario, K0K 2T0 ◆ Phone: 613-476-7994 ◆ Fax: 613-476-0279 ◆ www.rntconsulting.net ... Evaluating Low pH for Control of Zebra Mussels ... R. Claudi, M.Sc., TH Prescott, P.Eng., S. Mastitsky, Ph.D., D. ... Evans, Ph.D., and AC Taraborelli, M.Sc. ... Dreissenid mussels are an environmental and economic nuisance across North America. When present in the source of raw cooling water, they become a serious problem for industrial facilities using this water unless defensive steps are taken.
Management of Biological Invasions, 2013
When dreissenid mussels (Dreissena polymorpha-zebra mussel and Dreissena bugensisquagga mussel) a... more When dreissenid mussels (Dreissena polymorpha-zebra mussel and Dreissena bugensisquagga mussel) are present in the source of raw cooling water they become a serious problem for industrial facilities using this water unless defensive steps are taken. The treatment of choice for most facilities tends to be one of chemical control, as it is convenient and effective. The major advantage offered by chemical treatments is that they can be engineered to protect most of the facility, from intake to discharge. A wide variety of chemical treatment strategies is available for controlling mussel populations; however, minimizing local environmental impact is frequently difficult. Chlorine, widely used for dreissenid control, creates undesirable byproducts. Proprietary compounds used for mussel control generally have to be detoxified by bentonite clay. Both chlorine and proprietary products tend to be non-selective and therefore may be toxic to all forms of aquatic life.
This conference has provided a venue for the exchange of information on various aspects of aquati... more This conference has provided a venue for the exchange of information on various aspects of aquatic invasive species since its inception in 1990. The conference continues to provide an opportunity for dialog between academia, industry and environmental regulators within North America and from abroad.
Hemimysis anomala is one of the latest macroinvertebrates to invade the Laurentian Great Lakes. S... more Hemimysis anomala is one of the latest macroinvertebrates to invade the Laurentian Great Lakes. Since first reported in 2006, Hemimysis have been confirmed in several locations within the Great Lakes basin. However, little is known about the seasonal and spatial variation in demographics and dynamics of Hemimysis populations. We used a standardised pier-based methodology to describe the distribution of Hemimysis at 29 locations around the shoreline of Lake Ontario in 2009. Samples were collected in spring, summer, and fall at most locations, and biweekly at one site (Bronte Creek) over a 12-month period in 2009. For each site, we estimated abundance by sex and size. The more temporally intensive sampling at Bronte Creek enabled us to estimate production. Hemimysis were found at 83% of the sites visited, with densities generally highest in the northwest and lower at the other sites. Production estimates (2.67-14.09 mg dry weight•m − 2 •d − 1) were higher than that of other common zooplankton species in the Great Lakes. We provide important life history parameters that will help ecologists better understand the potential impacts of Hemimysis on Great Lakes ecosystems.
823 County Road 35, RR#2, Picton, Ontario, K0K 2T0 ◆ Phone: 613-476-7994 ◆ Fax: 613-476-0279 ◆ ww... more 823 County Road 35, RR#2, Picton, Ontario, K0K 2T0 ◆ Phone: 613-476-7994 ◆ Fax: 613-476-0279 ◆ www.rntconsulting.net ... Evaluating Low pH for Control of Zebra Mussels ... R. Claudi, M.Sc., TH Prescott, P.Eng., S. Mastitsky, Ph.D., D. ... Evans, Ph.D., and AC Taraborelli, M.Sc. ... Dreissenid mussels are an environmental and economic nuisance across North America. When present in the source of raw cooling water, they become a serious problem for industrial facilities using this water unless defensive steps are taken.
We assessed round goby (Apollonia melanostoma) density and size structure in two sections of the ... more We assessed round goby (Apollonia melanostoma) density and size structure in two sections of the Bay of Quinte (Lake Ontario) that had been invaded by this species two years apart. Round goby density was assessed with 50 m linear transects, recorded with an underwater video recording apparatus developed for this study that included a depth sounder for maintaining a fixed distance above the substrate. The highest mean round goby densities were observed in the shallowest depth zone (1.5-3 m) at both sites, but there were differences between the sites in the habitat types where the highest densities occurred and there were no significant density differences among habitat types at either site (rock with sparse vegetation, mud with sparse vegetation, sand/mud with moderate vegetation cover). In the upper bay, mean body length of round gobies declined with depth, whereas in the lower bay, mean round goby length was greatest in the deepest zone. Mean body length of round gobies did not differ significantly by habitat type in either section of the bay.
North American Journal of Fisheries Management, 2006
Allometric relationships between calcified structures and total length of round goby Neogobius me... more Allometric relationships between calcified structures and total length of round goby Neogobius melanostomus were determined from a sample of fish ranging in total length from 53 to 152 mm. Each of the 10 allometric equations gave coefficients of determination (r ) that were greater than 0.80 and highly significant. The equations with the most predictive ability were those relating total
Journal of Great Lakes Research, 2010
We compared round goby (Neogobius melanostomus) population structure and biomass, estimated the q... more We compared round goby (Neogobius melanostomus) population structure and biomass, estimated the quantity of prey consumed by round goby and assessed predation on round goby in two areas of the Bay of Quinte (upper and lower bay) that were invaded by this species two years apart. A bioenergetics approach was used to estimate round goby consumption and to illustrate the influence of changes in the round goby biomass, from May to October in both areas of the bay. Mean round goby biomass was 5 tonnes/km 2 for the upper bay and 11.2 tonnes/km 2 for the lower bay. Round goby populations were dominated by age-0 to age-2 individuals; older individuals were rare although they constituted a greater portion of total biomass in the earlier invaded lower bay than the upper bay. Estimated round goby consumption was 78.4 tonnes/km 2 for the upper bay and 127.1 tonnes/km 2 for the lower bay; dreissenids were the most important prey followed by chironomids, zooplankton and amphipods. Diet analysis showed that round gobies were consumed by all predator species analyzed, and constituted a high percentage of stomach content biomass in yellow perch (Perca flavescens), largemouth bass (Micropterus salmoides) and northern pike (Esox lucius). Age structure differences between the upper and lower bay are consistent with those expected between expanding and stable populations.
Journal of Great Lakes Research, 2009
A system for visual surveys of bottom fishes, assembled from readily available components, is des... more A system for visual surveys of bottom fishes, assembled from readily available components, is described. A camera and a depth sounder transducer are mounted on a towed body. The camera captures the images, and the depth sounder measures the distance between the camera and the bottom. A video recorder is used to record the data-the video channel for the image, and the audio channel for distance information, which is dictated from the depth sounder display into a microphone. A relationship between distance and magnification is used to estimate the width of the survey path and the size of surveyed objects. A comparison of round goby (Apollonia melanostoma) density estimated by repeated seining and use of the underwater visual apparatus showed that the smallest individuals are underrepresented by the visual assessment, but the visual method detects about 85% of the 50 mm TL or larger gobies.
Journal of Great Lakes Research, 2009
We assessed round goby (Apollonia melanostoma) density and size structure in two sections of the ... more We assessed round goby (Apollonia melanostoma) density and size structure in two sections of the Bay of Quinte (Lake Ontario) that had been invaded by this species two years apart. Round goby density was assessed with 50 m linear transects, recorded with an underwater video recording apparatus developed for this study that included a depth sounder for maintaining a fixed distance above the substrate. The highest mean round goby densities were observed in the shallowest depth zone (1.5-3 m) at both sites, but there were differences between the sites in the habitat types where the highest densities occurred and there were no significant density differences among habitat types at either site (rock with sparse vegetation, mud with sparse vegetation, sand/mud with moderate vegetation cover). In the upper bay, mean body length of round gobies declined with depth, whereas in the lower bay, mean round goby length was greatest in the deepest zone. Mean body length of round gobies did not differ significantly by habitat type in either section of the bay.
Journal of Great Lakes Research, 2012
Hemimysis anomala is one of the latest macroinvertebrates to invade the Laurentian Great Lakes. S... more Hemimysis anomala is one of the latest macroinvertebrates to invade the Laurentian Great Lakes. Since first reported in 2006, Hemimysis have been confirmed in several locations within the Great Lakes basin. However, little is known about the seasonal and spatial variation in demographics and dynamics of Hemimysis populations. We used a standardised pier-based methodology to describe the distribution of Hemimysis
Management of Biological Invasions, 2013
When dreissenid mussels (Dreissena polymorpha -zebra mussel and Dreissena bugensisquagga mussel) ... more When dreissenid mussels (Dreissena polymorpha -zebra mussel and Dreissena bugensisquagga mussel) are present in the source of raw cooling water they become a serious problem for industrial facilities using this water unless defensive steps are taken. The treatment of choice for most facilities tends to be one of chemical control, as it is convenient and effective. The major advantage offered by chemical treatments is that they can be engineered to protect most of the facility, from intake to discharge. A wide variety of chemical treatment strategies is available for controlling mussel populations; however, minimizing local environmental impact is frequently difficult. Chlorine, widely used for dreissenid control, creates undesirable byproducts. Proprietary compounds used for mussel control generally have to be detoxified by bentonite clay. Both chlorine and proprietary products tend to be non-selective and therefore may be toxic to all forms of aquatic life. As dreissenid mussels have a relatively narrow range of pH tolerance, with the optimum range being pH 7.5 to 9.3, it was hypothesized that by manipulating this environmental variable it may be possible to control the growth, settlement, and survival of dreissenids in raw water systems by increasing the pH level with a single point addition. Two field experiments were carried out using a custom built flow-through laboratory to test the effect of elevated pH on dreissenid mussels. The first experiment was carried out on quagga mussels in the lower Colorado River and the second was performed on zebra mussels using water from San Justo Reservoir in San Benito County, California. Both experiments tested the ability of dreissenid pediveligers to settle under conditions of elevated pH, the long term survival of the adult dreissenids under the same conditions, and the influence on experimental conditions on corrosion rates for carbon steel, stainless steel, and copper.
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Papers by Ana Taraborelli