Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.3.06
A. Shiels, Danika Spock, Tyler Cochran, L. Baeten
{"title":"Efficacy testing of Goodnature A24 self-resetting rat traps for wild house mice (Mus musculus)","authors":"A. Shiels, Danika Spock, Tyler Cochran, L. Baeten","doi":"10.3391/mbi.2022.13.3.06","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.3.06","url":null,"abstract":"","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.1.05
N. W. Thunnissen, Sytske de Waart, F. Collas, E. Jongejans, J. Hendriks, G. van der Velde, R. Leuven
Worldwide over 910 terrestrial planarian species have been described. They mainly occur in tropical and subtropical regions. In Europe, 22 alien terrestrial planarian species have been recorded over the last decades. In The Netherlands, 9 alien species have been found so far, mostly in greenhouses. Three of these species have established populations in gardens (i.e., Marionfyfea adventor , Caenoplana variegata and Parakontikia ventrolineata ). Alien terrestrial planarians that consume earthworms and are established outdoors can have a negative impact on biodiversity and soil quality by reducing earthworm populations. Their impact on earthworm populations can be high, but is difficult to assess due to limited knowledge of the feeding patterns and ferocity of most terrestrial planarian species. Risk assessments for The Netherlands carried out with the Harmonia + scheme shows that only the New Zeeland land planarian Arthurdendyus triangulatus scores high for potentially risks due to its ability to significantly reduce earthworm densities. This species has not yet been found in The Netherlands, but already occurs in the United Kingdom, Ireland, and Iceland. Obama nungara obtained a medium risk score and all other species a low risk score. Due to the limited information about terrestrial planarians and their potential impact, the certainty of most risk scores is low to moderate. Therefore, it is recommended to update their risk assessments periodically based on new information about their invasion biology. Phytosanitary measures can limit the unintentional import of alien planarian species.
{"title":"Risk screening and management of alien terrestrial planarians in The Netherlands","authors":"N. W. Thunnissen, Sytske de Waart, F. Collas, E. Jongejans, J. Hendriks, G. van der Velde, R. Leuven","doi":"10.3391/mbi.2022.13.1.05","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.1.05","url":null,"abstract":"Worldwide over 910 terrestrial planarian species have been described. They mainly occur in tropical and subtropical regions. In Europe, 22 alien terrestrial planarian species have been recorded over the last decades. In The Netherlands, 9 alien species have been found so far, mostly in greenhouses. Three of these species have established populations in gardens (i.e., Marionfyfea adventor , Caenoplana variegata and Parakontikia ventrolineata ). Alien terrestrial planarians that consume earthworms and are established outdoors can have a negative impact on biodiversity and soil quality by reducing earthworm populations. Their impact on earthworm populations can be high, but is difficult to assess due to limited knowledge of the feeding patterns and ferocity of most terrestrial planarian species. Risk assessments for The Netherlands carried out with the Harmonia + scheme shows that only the New Zeeland land planarian Arthurdendyus triangulatus scores high for potentially risks due to its ability to significantly reduce earthworm densities. This species has not yet been found in The Netherlands, but already occurs in the United Kingdom, Ireland, and Iceland. Obama nungara obtained a medium risk score and all other species a low risk score. Due to the limited information about terrestrial planarians and their potential impact, the certainty of most risk scores is low to moderate. Therefore, it is recommended to update their risk assessments periodically based on new information about their invasion biology. Phytosanitary measures can limit the unintentional import of alien planarian species.","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.1.08
Bárbara Zaldívar-Cruz, R. Pérez-Ceballos, A. Zaldívar-Jiménez, J. Canales-Delgadillo, Esthela Endañú-Huerta, Alfredo Beltrán Flores, Juan Tun-Garrido
The coastal dune at the natural protected area of Cozumel Island has been impacted by the invasive Australian pine (Casuarina equisetifolia), which is highly competitive with the native species and only few native plant species can grow under its canopy. Our goal was to demonstrate that the Australian pine’s presence reduces the cover and vegetation diversity of the coastal dune’s native species. We used ten sampling plots (100 m each), five of which included Australian pine (invaded), and five that did not (non-invaded). We recorded the number of different plant species and their cover, height, and diameter in each plot. We found 43 plant species belonging to 40 genera, from which 37 species were found in the non-invaded plots, while only 26 plant species were present in the invaded ones. The vegetation density (3547 ± 709 individuals ha) and the cover (65%) in the plots that lacked Australian pine were higher compared to the density (2785 ± 802 individuals ha) and cover (35%) of the plots that included it. According to our analyses, Australian pine presence negatively influenced the species composition and abundance of the native species. Moreover, we found significant differences in the native plant diversity between the invaded and non-invaded plots. Our results demonstrated that invasive species, such as the Australian pine, negatively affected the native plant community in the coastal dune because it constrained its community structure.
{"title":"Structural and diversity changes in coastal dunes from the Mexican Caribbean: the case of the invasive Australian pine (Casuarina equisetifolia)","authors":"Bárbara Zaldívar-Cruz, R. Pérez-Ceballos, A. Zaldívar-Jiménez, J. Canales-Delgadillo, Esthela Endañú-Huerta, Alfredo Beltrán Flores, Juan Tun-Garrido","doi":"10.3391/mbi.2022.13.1.08","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.1.08","url":null,"abstract":"The coastal dune at the natural protected area of Cozumel Island has been impacted by the invasive Australian pine (Casuarina equisetifolia), which is highly competitive with the native species and only few native plant species can grow under its canopy. Our goal was to demonstrate that the Australian pine’s presence reduces the cover and vegetation diversity of the coastal dune’s native species. We used ten sampling plots (100 m each), five of which included Australian pine (invaded), and five that did not (non-invaded). We recorded the number of different plant species and their cover, height, and diameter in each plot. We found 43 plant species belonging to 40 genera, from which 37 species were found in the non-invaded plots, while only 26 plant species were present in the invaded ones. The vegetation density (3547 ± 709 individuals ha) and the cover (65%) in the plots that lacked Australian pine were higher compared to the density (2785 ± 802 individuals ha) and cover (35%) of the plots that included it. According to our analyses, Australian pine presence negatively influenced the species composition and abundance of the native species. Moreover, we found significant differences in the native plant diversity between the invaded and non-invaded plots. Our results demonstrated that invasive species, such as the Australian pine, negatively affected the native plant community in the coastal dune because it constrained its community structure.","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.3.07
R. Baldwin, Ryan Meinerz, A. Shiels
{"title":"Efficacy of Goodnature A24 self-resetting traps and diphacinone bait for controlling black rats (Rattus rattus) in citrus orchards","authors":"R. Baldwin, Ryan Meinerz, A. Shiels","doi":"10.3391/mbi.2022.13.3.07","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.3.07","url":null,"abstract":"","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.4.09
J. García‐de‐Lomas, Elías D. Dana, J. Borrero, Javier Yuste, Antonio Corpas, José Boniquito, Francisco Castilleja, J. Martinez, C. Rodríguez, F. Verloove
A rapid response action carried out against the invasion of water hyacinth ( Eichhornia crassipes ) in the Guadalquivir River branch in Seville (Southern Spain) is described and analyzed. Removal was implemented and coordinated by the regional environmental Council, National security forces and public companies. Immediately after its detection, the distribution and abundance of water hyacinth, and the possible origin of introduction were assessed as the basis for selecting a feasible removal method. Plants were scattered across 110 ha and a perimeter of 8.4 km. A total biomass of 1,931 kg (fresh weight) was removed between May and December 2021 by combining manual removal from water using inflatable boats, floating booms, wetsuits and fishing waders, as well as removal from the shore. In total, the action cost ca. €22,500. Most biomass (83%) was removed during the initial control phase (one month). However, most of the efforts and costs (83%) were made in the following seven months, especially for monitoring and follow-up treatments. Rapid response avoided the growth, blooming and spread that could be expected in summer, coinciding with the optimal growing conditions. Moreover, rapid response reduced ca. 50 times the biomass and control costs with respect to a delayed action (i.e., after summer). Despite the fact that monitoring required a higher effort and cost than the initial control phase, it altogether represented a great cost saving as the invasion was kept at bay. The coordination between the regional Council, National security forces and public companies has taken advantage of the specific strengths of each one of them, achieving the shortest possible response time.
{"title":"Rapid response to water hyacinth (Eichhornia crassipes) invasion in the Guadalquivir river branch in Seville (southern Spain)","authors":"J. García‐de‐Lomas, Elías D. Dana, J. Borrero, Javier Yuste, Antonio Corpas, José Boniquito, Francisco Castilleja, J. Martinez, C. Rodríguez, F. Verloove","doi":"10.3391/mbi.2022.13.4.09","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.4.09","url":null,"abstract":"A rapid response action carried out against the invasion of water hyacinth ( Eichhornia crassipes ) in the Guadalquivir River branch in Seville (Southern Spain) is described and analyzed. Removal was implemented and coordinated by the regional environmental Council, National security forces and public companies. Immediately after its detection, the distribution and abundance of water hyacinth, and the possible origin of introduction were assessed as the basis for selecting a feasible removal method. Plants were scattered across 110 ha and a perimeter of 8.4 km. A total biomass of 1,931 kg (fresh weight) was removed between May and December 2021 by combining manual removal from water using inflatable boats, floating booms, wetsuits and fishing waders, as well as removal from the shore. In total, the action cost ca. €22,500. Most biomass (83%) was removed during the initial control phase (one month). However, most of the efforts and costs (83%) were made in the following seven months, especially for monitoring and follow-up treatments. Rapid response avoided the growth, blooming and spread that could be expected in summer, coinciding with the optimal growing conditions. Moreover, rapid response reduced ca. 50 times the biomass and control costs with respect to a delayed action (i.e., after summer). Despite the fact that monitoring required a higher effort and cost than the initial control phase, it altogether represented a great cost saving as the invasion was kept at bay. The coordination between the regional Council, National security forces and public companies has taken advantage of the specific strengths of each one of them, achieving the shortest possible response time.","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.2.10
M. Brown, R. Robins, P. Schofield
The risk of a newly discovered non-native fish species in Florida (USA): Cichlasoma dimerus ([Heckel, 1840]; Family: Cichlidae) is assessed. Its tolerance to cold temperatures was experimentally evaluated and information on its biology and ecology was synthesized. In the cold-temperature tolerance experiment, temperature was lowered from 24 °C by increments of 1 °C per hour, mimicking a typical cold weather front. Fish lost equilibrium at a mean temperature of 7.8 °C and died at 4.7 °C. Those values are lower than most other non-native fishes from the state that have been experimentally evaluated, and it appears C. dimerus is the most cold-tolerant cichlid established in Florida. The combination of cold-temperature tolerance and other biological/ecological factors (e.g., adult size, reproduction and parental care, diet, habitat, and other behaviors) along with the geographic range and habitat diversity of specimens vouchered in museums, indicate C. dimerus may be able to invade many freshwater ecosystems in the state, including environmentally sensitive freshwater springs.
{"title":"Risk assessment of chanchita Cichlasoma dimerus (Heckel, 1840), a newly identified non-native cichlid fish in Florida","authors":"M. Brown, R. Robins, P. Schofield","doi":"10.3391/mbi.2022.13.2.10","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.2.10","url":null,"abstract":"The risk of a newly discovered non-native fish species in Florida (USA): Cichlasoma dimerus ([Heckel, 1840]; Family: Cichlidae) is assessed. Its tolerance to cold temperatures was experimentally evaluated and information on its biology and ecology was synthesized. In the cold-temperature tolerance experiment, temperature was lowered from 24 °C by increments of 1 °C per hour, mimicking a typical cold weather front. Fish lost equilibrium at a mean temperature of 7.8 °C and died at 4.7 °C. Those values are lower than most other non-native fishes from the state that have been experimentally evaluated, and it appears C. dimerus is the most cold-tolerant cichlid established in Florida. The combination of cold-temperature tolerance and other biological/ecological factors (e.g., adult size, reproduction and parental care, diet, habitat, and other behaviors) along with the geographic range and habitat diversity of specimens vouchered in museums, indicate C. dimerus may be able to invade many freshwater ecosystems in the state, including environmentally sensitive freshwater springs.","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.3.05
A. Shiels, L. Crampton, Danika Spock, Alison L. Greggor, Kate Earnest, L. Berry, B. Masuda
{"title":"Testing Goodnature A24 rat trap excluders and trap height placement to prevent non-target bird mortality","authors":"A. Shiels, L. Crampton, Danika Spock, Alison L. Greggor, Kate Earnest, L. Berry, B. Masuda","doi":"10.3391/mbi.2022.13.3.05","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.3.05","url":null,"abstract":"","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.1.07
Darren Garland, W. Earle, J. Caffrey, Cian Taylor, S. Meehan, N. Touzet, F. Lucy
A benth ic geotextile was used to trial the management of an invasive aquatic macrophyte Nuttall’s pondweed ( Elodea nuttallii (Planch.) H. St. John, 1920) in Lough Arrow, a premier trout angling lake in the north-west of Ireland, designated as a Natura 2000 site (Special Area of Conservation (Annex I habitat, “Hard oligo-mesotrophic waters with benthic vegetation of Chara spp.”) and Special Protection Area for birdlife). The aim of this study was to manage E. nuttallii , a relatively recent arrival to this lake, while simultaneously promoting rehabilitation of native charophytes. The trial was carried out in Loughbrick bay, one of the lough’s primary boating launch sites, an area determined as highly infested with E. nuttallii . Two experimental areas covering a total of 800 m 2 were treated by covering the invasive weed and substrate with jute textile, a single and double layer respectively. The trial was successful in controlling E. nuttallii for both single (P = 0) and double layer treatments (P = 0.002). The treatments applied resulted in a reduction of the mean percentage cover of the invasive species by > 60% for both treatments. Post-treatment mean percentage cover of E. nuttallii did not exceed 6% for either treatment. Furthermore, the mean percentage cover of indigenous charophyte flora present pre-treatment was not significantly impacted by the application of jute in either the single (P = 0.165) or double treatment (P = 0.353). For biosecurity purposes, the treatment areas were strategically positioned in close proximity to the bays pier and slipway. The treated transects were marked with navigational buoys to provide a corridor for boats entering and exiting the lake, which help to contain the invasive within the Natura 2000 site while reducing the spread risk via this pathway to other sites vulnerable to infestation.
{"title":"Management of the invasive Nuttall’s pondweed (Elodea nuttallii) in Lough Arrow, a Natura 2000 designated lake in Western Ireland","authors":"Darren Garland, W. Earle, J. Caffrey, Cian Taylor, S. Meehan, N. Touzet, F. Lucy","doi":"10.3391/mbi.2022.13.1.07","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.1.07","url":null,"abstract":"A benth ic geotextile was used to trial the management of an invasive aquatic macrophyte Nuttall’s pondweed ( Elodea nuttallii (Planch.) H. St. John, 1920) in Lough Arrow, a premier trout angling lake in the north-west of Ireland, designated as a Natura 2000 site (Special Area of Conservation (Annex I habitat, “Hard oligo-mesotrophic waters with benthic vegetation of Chara spp.”) and Special Protection Area for birdlife). The aim of this study was to manage E. nuttallii , a relatively recent arrival to this lake, while simultaneously promoting rehabilitation of native charophytes. The trial was carried out in Loughbrick bay, one of the lough’s primary boating launch sites, an area determined as highly infested with E. nuttallii . Two experimental areas covering a total of 800 m 2 were treated by covering the invasive weed and substrate with jute textile, a single and double layer respectively. The trial was successful in controlling E. nuttallii for both single (P = 0) and double layer treatments (P = 0.002). The treatments applied resulted in a reduction of the mean percentage cover of the invasive species by > 60% for both treatments. Post-treatment mean percentage cover of E. nuttallii did not exceed 6% for either treatment. Furthermore, the mean percentage cover of indigenous charophyte flora present pre-treatment was not significantly impacted by the application of jute in either the single (P = 0.165) or double treatment (P = 0.353). For biosecurity purposes, the treatment areas were strategically positioned in close proximity to the bays pier and slipway. The treated transects were marked with navigational buoys to provide a corridor for boats entering and exiting the lake, which help to contain the invasive within the Natura 2000 site while reducing the spread risk via this pathway to other sites vulnerable to infestation.","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.4.03
R. Sousa, L. Pereira, Mariele Cintra, C. Freitas, Marcos A. Mereles, D. Zacardi, C. Júnior, L. Castello, J. Vitule
The introduction of non-native fish poses a major threat to aquatic fauna in freshwater ecosystems around the world, often as a consequence of increased predation pressure, which results in adverse environmental and socioeconomic effects. In this study, we present a survey of publicly available information on the occurrence of pirarucu ( Arapaima spp.) throughout Brazil, with an emphasis on the status of native and non-native populations, and discuss the implications for the conservation of aquatic biodiversity and the urgent need for strict control and monitoring of pirarucu breeding programs, especially in regions where it is non-native. We believe that researchers and public policy makers/managers should collaborate in managing introductions of non-native fish, and develop regulations, scientific research, risk assessments, and environmental education with this end in mind.
{"title":"Status of Arapaima spp. in Brazil: threatened in its places of origin, a rapidly spreading invader elsewhere","authors":"R. Sousa, L. Pereira, Mariele Cintra, C. Freitas, Marcos A. Mereles, D. Zacardi, C. Júnior, L. Castello, J. Vitule","doi":"10.3391/mbi.2022.13.4.03","DOIUrl":"https://doi.org/10.3391/mbi.2022.13.4.03","url":null,"abstract":"The introduction of non-native fish poses a major threat to aquatic fauna in freshwater ecosystems around the world, often as a consequence of increased predation pressure, which results in adverse environmental and socioeconomic effects. In this study, we present a survey of publicly available information on the occurrence of pirarucu ( Arapaima spp.) throughout Brazil, with an emphasis on the status of native and non-native populations, and discuss the implications for the conservation of aquatic biodiversity and the urgent need for strict control and monitoring of pirarucu breeding programs, especially in regions where it is non-native. We believe that researchers and public policy makers/managers should collaborate in managing introductions of non-native fish, and develop regulations, scientific research, risk assessments, and environmental education with this end in mind.","PeriodicalId":54262,"journal":{"name":"Management of Biological Invasions","volume":null,"pages":null},"PeriodicalIF":1.5,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69555619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.3391/mbi.2022.13.2.05
S. Hall, Sarah Stewart-Clark, E. Kupriyanova
In 2012, an invasion by a serpulid tubeworm, unknown to the Atlantic Canada region, caused heavy biofouling on an oyster lease in Eel Lake, Argyle, Nova Scotia. The species was identified as Hydroides dianthus (Verrill, 1873) , and this morphological identification was confirmed by comparing a newly sequenced COI gene fragment with H. dianthus sequences available in GenBank . Heavy biofouling on the oyster lease resulted in the need to develop mitigation strategies. It was hypothesized that by understanding the spawning behaviour and spatial/temporal patterns of H. dianthus larvae in Eel Lake, biofouling could be mitigated by determining an optimal depth that oyster cages should be maintained at during its active spawning period. To monitor H. dianthus in Eel Lake, species-specific primers associated with the COI gene were developed. Specificity and sensitivity of primers were tested, and the primer set H. dianthus COI4F/R was chosen for monitoring . Water samples were collected from Eel Lake from June to August 2013, and eDNA was extracted. Spatial and temporal monitoring of H. dianthus using eDNA was completed at four sites (three fouled, one non-fouled), and at three depths (0.3 m, 1.5 m, and 3.0 m) in Eel Lake. Water samples tested positive for H. dianthus in most sites and depths on June 20 th , indicating a spawning event had occurred. Subsequently, no significant differences between sites and depths were found and H. dianthus was detected throughout the summer in all locations and depths monitored. The mean % of positive PCR results significantly increased from 18.7 to 65.0% from June to August. Results suggest that H. dianthus spawned frequently during a reproductive season ranging from at least June 20 to August 30 in Eel Lake at temperatures ~ 18–22 °C. The results of this study indicated that an optimal oyster cage depth for biofouling mitigation could not be determined and highlighted the challenges to aquaculture associated with biofouling of H. dianthus .
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