The zebra mussel is an important aquatic pest that causes great damage to freshwater-dependent industries, due to biofouling. The main goal of the project discussed here is to develop improved solutions to control thi...The zebra mussel is an important aquatic pest that causes great damage to freshwater-dependent industries, due to biofouling. The main goal of the project discussed here is to develop improved solutions to control this species. Three approaches have been explored in an attempt to design innovative application strategies for existing biocides： （i） encapsulation of toxins; （ii） combination of toxins; （iii） investigation of the seasonal variation of the species＇ tolerance to toxins. In this paper, the principles behind these approaches and the major results on each topic are presented. The benefits of adopting a chemical product engineering approach in conducting this project are also discussed.展开更多
Zebra mussels Dreissena polymorpha are a native bivalve from eastern Europe. They were first detected in North America in Lake St. Clair in 1988 and were presumably introduced via infested ballast water. Zebra mussels...Zebra mussels Dreissena polymorpha are a native bivalve from eastern Europe. They were first detected in North America in Lake St. Clair in 1988 and were presumably introduced via infested ballast water. Zebra mussels have spread rapidly across the United States, with 31 states reporting infestations as of 2019. Zebra mussels were first detected in South Dakota, USA, in 2015 in Lewis and Clark Lake and McCook Lake, with subsequent infestations occurring in Lake Yankton in 2017, Lakes Francis Case and Sharpe in 2019, and Pickerel Lake, Kampeska Lake, and Lake Cochrane in 2020. This review paper presents information on zebra mussel biology and control, with specific information on the waters of South Dakota, USA.展开更多
Brainerd Diarrhea is a syndrome of acute onset of watery, non-bloody diarrhea that lasts for a duration of 4 weeks or more. The index case of Brainerd Diarrhea was recorded in 1983, in the first such outbreak in Brain...Brainerd Diarrhea is a syndrome of acute onset of watery, non-bloody diarrhea that lasts for a duration of 4 weeks or more. The index case of Brainerd Diarrhea was recorded in 1983, in the first such outbreak in Brainerd, Minnesota. In 1989, a prohibited invasive species named Zebra Mussels (Dreissena polymorpha) were found in the great lakes of the United States. The 7 recorded outbreaks of Brainerd diarrhea were correlated with the location and time of zebra mussel infestations. The first outbreak that occurred due to consumption of raw milk took place in Minnesota which is near the waters infested by zebra mussels. All other outbreaks were related to consumption of contaminated unchlorinated water occurred in regions not directly close to the infested rivers. However, since infestations are thought to occur due to human activity, undocumented infestations faraway are still possible. Evidence shows minor correlations between Brainerd Diarrhea outbreaks and Zebra Mussel infestations. However, none of the facts are strong enough to establish or deny a significant correlation or causation. Further cohort studies and research need to be done on the recent discoveries of Zebra Mussel infestations and new Brainerd diarrhea outbreaks. The primary search engine used to gather information for this review was ScienceDirect and PubMed. More than 35 articles and case reports were reviewed and only 20 were shortlisted and used as references. None of the studies included were restricted to study design, but studies with less than 10 participants/patients were excluded from the review.展开更多
Several treatment options have been developed to minimize the spread of zebra mussel Dreissena polymorphaveligers (larvae) during fish transportation. However, the effect of these treatments on the survival of newly-f...Several treatment options have been developed to minimize the spread of zebra mussel Dreissena polymorphaveligers (larvae) during fish transportation. However, the effect of these treatments on the survival of newly-fertilized salmonid eggs has not been evaluated. This study examined the survival of water-hardened landlocked fall Chinook salmon Oncorhynchus tshawytscha eggs after one of four different treatments: 1) Control (no chemicals), 2) 100 mg/L formalin for two hours, 3) 750 mg/L of potassium chloride for one hour followed by 20 mg/L formalin for two hours, and 4) 750 mg/L of potassium chloride for one hour followed by 20 mg/L formalin for three hours. The 100 mg/L formalin treatment produced complete egg mortality. Survival to hatch was not significantly different among the other three treatments. Based on these results, the use of 750 mg/L potassium chloride for one hour followed by 20 mg/L formalin for three hours is recommended when moving Chinook salmon eggs from waters potentially infested with zebra mussels to hatcheries for incubation.展开更多
Zebra mussel Dreissena polymorpha is a Ponto-Caspian species invasive in Europe and North America, with great environmental impact. It lives byssally attached to hard substrata in large aggregations, which is often ex...Zebra mussel Dreissena polymorpha is a Ponto-Caspian species invasive in Europe and North America, with great environmental impact. It lives byssally attached to hard substrata in large aggregations, which is often explained by its preferences for conspecifics, though direct evidence for such preferences has been rather limited so far. We studied the reactions of zebra mussels to con- specifics, hypothesizing that they may either be attracted to one another or form aggregations only in the absence of alternative attachment sites, in Experiment 1, we tested mussel tendency to detach from existing druses depending on druse size （2-25 individuals） and substratum type （soft： sand; hard： glass）. Mussels detached significantly more often on the hard substratum and from larger druses compared to soft substratum and smaller druses, respectively. This indicates that mussels tended to avoid conspecifics at high density, particularly when alternative substratum was available. In Experiment 2, we tested the responses of single mussels to distant （3 or 15cm） conspecifics （0, 3, 15 individuals per 2.51 tank） on the sandy substratum. The presence of conspecifics, regardless of their distance and density, resulted in single unattached mussels staying more often in their initial positions. Mussels did not move preferentially towards or away from the conspecifics. Thus, even on unsuitable substratum mussels were not attracted by conspecifics and probably exhibited an avoidance reaction by reducing their movement. This suggests that dense mussel aggregations are formed due to the lack of available alternative attachment sites rather than due to their preferences for conspecifics.展开更多
The spread of Aquatic Invasive Species (AIS) is a constant threat for western US waters. The state of South Dakota detected zebra mussels (Dreissena polymorpha) for the first time at Lewis and Clark Reservoir in 2014....The spread of Aquatic Invasive Species (AIS) is a constant threat for western US waters. The state of South Dakota detected zebra mussels (Dreissena polymorpha) for the first time at Lewis and Clark Reservoir in 2014. Since then, efforts have been towards preventing their further expansion. To determine possible avenues of infestation westward, we used ArcGIS to map the home zip codes of boaters using four western reservoirs (Belle Fourche Reservoir, Pactola Reservoir, Sheridan Lake and Angostura Reservoir). A 60-mile buffer was used to determine spatial relationships of boater zip codes to establish zebra mussel populations and was considered areas of high risk. We found that there were three instances where a boater came from a high-risk area during the study period. Our results show possible pathways for Dreissena expansion into western South Dakota reservoirs. Most notably is that exposure can occur from either an inter- or intra-state vector. This information confirmed that there is a risk of additional water bodies in South Dakota becoming infected. Based on past studies, prevention is the best method in slowing the expansion of zebra mussels in South Dakota. We suggest three actions, strategically placed decontamination stations, continued public awareness efforts and differentiating boat registration tags on watercraft that are near infested water bodies.展开更多
Background:Aquatic invertebrate species that have broad salinity tolerances may be pre-adapted for invasion success and biogeographic distributional range expansions,facilitated by human-mediated dispersal(HMD),leadin...Background:Aquatic invertebrate species that have broad salinity tolerances may be pre-adapted for invasion success and biogeographic distributional range expansions,facilitated by human-mediated dispersal(HMD),leading to a trend to become neocosmopolitan across many regions of the world.This pattern appears to characterize many Ponto-Caspian(P-C)aquatic invertebrates,which have a>100-year history as aquatic invasive species(AIS),spreading throughout much of Eurasia and for some,in North America and beyond.Our study compiles comparative salinity conditions and distributional data for AIS invertebrate species globally versus those originating from the P-C region,to test whether they statistically differ.Results:Our investigation discerns that a total of 1861 invertebrate AIS taxa have been recorded worldwide,with(A)70.5%exclusively living in the saline adaptive zone of brackish(0.5-30 ppt;A1)and/or marine waters(>30 ppt;A2),(B)20%in the freshwater adaptive zone alone(0-0.5 ppt),(C)7.5%being euryhaline(across both A and B),and(D)2%being semi-aquatic in either(D1)freshwater/terrestrial or(D2)saline/terrestrial environments.In contrast,our results indicate the following proportions for AIS invertebrates of P-C origins:(A)27%exclusively inhabit the saline adaptive zone,(B)25%are entirely freshwater,(C)45%are euryhaline,and(D)3%are semi-aquatic,significantly differing from the global pattern.Euryhaline AIS native to the P-C region thus markedly outnumber(45%)those originating from other regions(7.5%),likely pre-adapting them for widespread establishment in harbors,estuaries,and coastal areas.Moreover,most P-C invertebrate AIS(70%)contain freshwater-tolerant populations(B+C),rendering them very successful invaders of inland water bodies.These broad salinity tolerances of P-C AIS underlie their tremendous invasion successes and growing neocosmopolitan distributions with HMD.Conclusions:An evolutionary and recent history of broad salinity tolerances of a large proportion of P-C invertebrates appears to enhance their ability to invade,establish,and spread in new regions,especially harbors,estuaries,and freshwaters,leading to their increasing neocosmopolitan distributions.This trend likely will continue-accelerating with climate change and increased global transportation-meriting worldwide conservation agency focus and cooperation,along with public education programs aimed to rapidly identify and circumvent new introductions and spread.展开更多
基金the Portuguese Foundation for Science and Technology (scholarship SFRH/BD/18731/2004 and Research Project Grant POCI/EQU/59305/2004).
文摘The zebra mussel is an important aquatic pest that causes great damage to freshwater-dependent industries, due to biofouling. The main goal of the project discussed here is to develop improved solutions to control this species. Three approaches have been explored in an attempt to design innovative application strategies for existing biocides： （i） encapsulation of toxins; （ii） combination of toxins; （iii） investigation of the seasonal variation of the species＇ tolerance to toxins. In this paper, the principles behind these approaches and the major results on each topic are presented. The benefits of adopting a chemical product engineering approach in conducting this project are also discussed.
文摘Zebra mussels Dreissena polymorpha are a native bivalve from eastern Europe. They were first detected in North America in Lake St. Clair in 1988 and were presumably introduced via infested ballast water. Zebra mussels have spread rapidly across the United States, with 31 states reporting infestations as of 2019. Zebra mussels were first detected in South Dakota, USA, in 2015 in Lewis and Clark Lake and McCook Lake, with subsequent infestations occurring in Lake Yankton in 2017, Lakes Francis Case and Sharpe in 2019, and Pickerel Lake, Kampeska Lake, and Lake Cochrane in 2020. This review paper presents information on zebra mussel biology and control, with specific information on the waters of South Dakota, USA.
文摘Brainerd Diarrhea is a syndrome of acute onset of watery, non-bloody diarrhea that lasts for a duration of 4 weeks or more. The index case of Brainerd Diarrhea was recorded in 1983, in the first such outbreak in Brainerd, Minnesota. In 1989, a prohibited invasive species named Zebra Mussels (Dreissena polymorpha) were found in the great lakes of the United States. The 7 recorded outbreaks of Brainerd diarrhea were correlated with the location and time of zebra mussel infestations. The first outbreak that occurred due to consumption of raw milk took place in Minnesota which is near the waters infested by zebra mussels. All other outbreaks were related to consumption of contaminated unchlorinated water occurred in regions not directly close to the infested rivers. However, since infestations are thought to occur due to human activity, undocumented infestations faraway are still possible. Evidence shows minor correlations between Brainerd Diarrhea outbreaks and Zebra Mussel infestations. However, none of the facts are strong enough to establish or deny a significant correlation or causation. Further cohort studies and research need to be done on the recent discoveries of Zebra Mussel infestations and new Brainerd diarrhea outbreaks. The primary search engine used to gather information for this review was ScienceDirect and PubMed. More than 35 articles and case reports were reviewed and only 20 were shortlisted and used as references. None of the studies included were restricted to study design, but studies with less than 10 participants/patients were excluded from the review.
文摘Several treatment options have been developed to minimize the spread of zebra mussel Dreissena polymorphaveligers (larvae) during fish transportation. However, the effect of these treatments on the survival of newly-fertilized salmonid eggs has not been evaluated. This study examined the survival of water-hardened landlocked fall Chinook salmon Oncorhynchus tshawytscha eggs after one of four different treatments: 1) Control (no chemicals), 2) 100 mg/L formalin for two hours, 3) 750 mg/L of potassium chloride for one hour followed by 20 mg/L formalin for two hours, and 4) 750 mg/L of potassium chloride for one hour followed by 20 mg/L formalin for three hours. The 100 mg/L formalin treatment produced complete egg mortality. Survival to hatch was not significantly different among the other three treatments. Based on these results, the use of 750 mg/L potassium chloride for one hour followed by 20 mg/L formalin for three hours is recommended when moving Chinook salmon eggs from waters potentially infested with zebra mussels to hatcheries for incubation.
文摘Zebra mussel Dreissena polymorpha is a Ponto-Caspian species invasive in Europe and North America, with great environmental impact. It lives byssally attached to hard substrata in large aggregations, which is often explained by its preferences for conspecifics, though direct evidence for such preferences has been rather limited so far. We studied the reactions of zebra mussels to con- specifics, hypothesizing that they may either be attracted to one another or form aggregations only in the absence of alternative attachment sites, in Experiment 1, we tested mussel tendency to detach from existing druses depending on druse size （2-25 individuals） and substratum type （soft： sand; hard： glass）. Mussels detached significantly more often on the hard substratum and from larger druses compared to soft substratum and smaller druses, respectively. This indicates that mussels tended to avoid conspecifics at high density, particularly when alternative substratum was available. In Experiment 2, we tested the responses of single mussels to distant （3 or 15cm） conspecifics （0, 3, 15 individuals per 2.51 tank） on the sandy substratum. The presence of conspecifics, regardless of their distance and density, resulted in single unattached mussels staying more often in their initial positions. Mussels did not move preferentially towards or away from the conspecifics. Thus, even on unsuitable substratum mussels were not attracted by conspecifics and probably exhibited an avoidance reaction by reducing their movement. This suggests that dense mussel aggregations are formed due to the lack of available alternative attachment sites rather than due to their preferences for conspecifics.
文摘The spread of Aquatic Invasive Species (AIS) is a constant threat for western US waters. The state of South Dakota detected zebra mussels (Dreissena polymorpha) for the first time at Lewis and Clark Reservoir in 2014. Since then, efforts have been towards preventing their further expansion. To determine possible avenues of infestation westward, we used ArcGIS to map the home zip codes of boaters using four western reservoirs (Belle Fourche Reservoir, Pactola Reservoir, Sheridan Lake and Angostura Reservoir). A 60-mile buffer was used to determine spatial relationships of boater zip codes to establish zebra mussel populations and was considered areas of high risk. We found that there were three instances where a boater came from a high-risk area during the study period. Our results show possible pathways for Dreissena expansion into western South Dakota reservoirs. Most notably is that exposure can occur from either an inter- or intra-state vector. This information confirmed that there is a risk of additional water bodies in South Dakota becoming infected. Based on past studies, prevention is the best method in slowing the expansion of zebra mussels in South Dakota. We suggest three actions, strategically placed decontamination stations, continued public awareness efforts and differentiating boat registration tags on watercraft that are near infested water bodies.
文摘Background:Aquatic invertebrate species that have broad salinity tolerances may be pre-adapted for invasion success and biogeographic distributional range expansions,facilitated by human-mediated dispersal(HMD),leading to a trend to become neocosmopolitan across many regions of the world.This pattern appears to characterize many Ponto-Caspian(P-C)aquatic invertebrates,which have a>100-year history as aquatic invasive species(AIS),spreading throughout much of Eurasia and for some,in North America and beyond.Our study compiles comparative salinity conditions and distributional data for AIS invertebrate species globally versus those originating from the P-C region,to test whether they statistically differ.Results:Our investigation discerns that a total of 1861 invertebrate AIS taxa have been recorded worldwide,with(A)70.5%exclusively living in the saline adaptive zone of brackish(0.5-30 ppt;A1)and/or marine waters(>30 ppt;A2),(B)20%in the freshwater adaptive zone alone(0-0.5 ppt),(C)7.5%being euryhaline(across both A and B),and(D)2%being semi-aquatic in either(D1)freshwater/terrestrial or(D2)saline/terrestrial environments.In contrast,our results indicate the following proportions for AIS invertebrates of P-C origins:(A)27%exclusively inhabit the saline adaptive zone,(B)25%are entirely freshwater,(C)45%are euryhaline,and(D)3%are semi-aquatic,significantly differing from the global pattern.Euryhaline AIS native to the P-C region thus markedly outnumber(45%)those originating from other regions(7.5%),likely pre-adapting them for widespread establishment in harbors,estuaries,and coastal areas.Moreover,most P-C invertebrate AIS(70%)contain freshwater-tolerant populations(B+C),rendering them very successful invaders of inland water bodies.These broad salinity tolerances of P-C AIS underlie their tremendous invasion successes and growing neocosmopolitan distributions with HMD.Conclusions:An evolutionary and recent history of broad salinity tolerances of a large proportion of P-C invertebrates appears to enhance their ability to invade,establish,and spread in new regions,especially harbors,estuaries,and freshwaters,leading to their increasing neocosmopolitan distributions.This trend likely will continue-accelerating with climate change and increased global transportation-meriting worldwide conservation agency focus and cooperation,along with public education programs aimed to rapidly identify and circumvent new introductions and spread.
