Pub Date : 2023-01-01DOI: 10.5751/ace-02401-180112
Adrián Jauregui, Paula A. Gerstmayer, M. Colombo, L. Segura
,
，
{"title":"High breeding success of the European Starling compared to native species in a recently invaded natural forest of South America","authors":"Adrián Jauregui, Paula A. Gerstmayer, M. Colombo, L. Segura","doi":"10.5751/ace-02401-180112","DOIUrl":"https://doi.org/10.5751/ace-02401-180112","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"33 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70963337","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 : 2023-01-01DOI: 10.5751/ace-02409-180109
J. Shonfield, E. Bayne
. Human-caused disturbances are encroaching on natural areas and quantifying the relative effects of different types of disturbance, and whether they interact on a landscape to create additive or synergistic cumulative effects, will provide a better understanding of how wildlife are affected. We evaluated potential cumulative effects of industrial disturbance on habitat use of Barred Owls ( Strix varia ), Great Horned Owls ( Bubo virginianus ), and Boreal Owls ( Aegolius funereus ) in Alberta’s boreal forest using acoustic survey presence/absence data and boosted regression tree analysis to quantify the relative importance and interactions of different types of industrial disturbance, as well as forest age and composition. Barred Owls were more likely to be found in older mixedwood and deciduous forest, and we found evidence suggestive of cumulative effects from a negative effect of total human footprint on habitat use and an additional negative effect of roads. Great Horned Owls were found in older forest but were relatively tolerant of disturbance, and soft linear features (seismic lines, pipelines, transmission lines) had a positive effect on habitat use, possibly due to these types of disturbances creating suitable hunting habitat. Boreal Owls were more likely to be found in older coniferous forest, and the effects of disturbance did not show clear evidence of sensitivity or tolerance to human disturbance. Our results indicate the importance of forest age and composition on habitat use for these owls. Cumulative effects varied among owl species and were potentially more significant for Barred Owl; for the other two species the effects of industrial disturbance were relatively small and there was no evidence of cumulative effects. Our study also demonstrates that assessing cumulative effects of human disturbance on wildlife using boosted-regression trees can effectively help focus conservation efforts and can be used, for example, for evaluating the environment effects of new projects prior to their implementation
{"title":"Weak support for cumulative effects of industrial disturbance on three owl species in Alberta’s boreal forest","authors":"J. Shonfield, E. Bayne","doi":"10.5751/ace-02409-180109","DOIUrl":"https://doi.org/10.5751/ace-02409-180109","url":null,"abstract":". Human-caused disturbances are encroaching on natural areas and quantifying the relative effects of different types of disturbance, and whether they interact on a landscape to create additive or synergistic cumulative effects, will provide a better understanding of how wildlife are affected. We evaluated potential cumulative effects of industrial disturbance on habitat use of Barred Owls ( Strix varia ), Great Horned Owls ( Bubo virginianus ), and Boreal Owls ( Aegolius funereus ) in Alberta’s boreal forest using acoustic survey presence/absence data and boosted regression tree analysis to quantify the relative importance and interactions of different types of industrial disturbance, as well as forest age and composition. Barred Owls were more likely to be found in older mixedwood and deciduous forest, and we found evidence suggestive of cumulative effects from a negative effect of total human footprint on habitat use and an additional negative effect of roads. Great Horned Owls were found in older forest but were relatively tolerant of disturbance, and soft linear features (seismic lines, pipelines, transmission lines) had a positive effect on habitat use, possibly due to these types of disturbances creating suitable hunting habitat. Boreal Owls were more likely to be found in older coniferous forest, and the effects of disturbance did not show clear evidence of sensitivity or tolerance to human disturbance. Our results indicate the importance of forest age and composition on habitat use for these owls. Cumulative effects varied among owl species and were potentially more significant for Barred Owl; for the other two species the effects of industrial disturbance were relatively small and there was no evidence of cumulative effects. Our study also demonstrates that assessing cumulative effects of human disturbance on wildlife using boosted-regression trees can effectively help focus conservation efforts and can be used, for example, for evaluating the environment effects of new projects prior to their implementation","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70963571","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 : 2023-01-01DOI: 10.5751/ace-02351-180106
Joseph K. Afrifa, Justus P. Deikumah, K. Monney
. Our understanding of how birds use human supplementary resources, especially artificial structures and patchy vegetation within urban areas, is limited. Our study compared the use of artificial structures versus natural vegetation by birds in built-up areas in the Cape Coast Metropolitan Assembly (CCMA) in the central region of Ghana. Using point count technique, we recorded bird species and the activities performed as well as the substrates they use in residential and commercial areas within the CCMA. We found that the mean bird abundance that used artificial structures did not differ significantly from those that used natural vegetation. The mean species richness that used artificial structures was found to differ significantly from those that used natural vegetation. The study also found a significant difference in activities performed by bird species and the substrate type used for daily life activities. Across species, birds showed preference for trees, shrubs, and natural vegetation structures for perching, feeding, and singing, whereas artificial structures such as billboards, telecommunication masts, ceilings of buildings, pylons, buildings, opening in street lights, and windows of buildings were preferred for nesting. These results demonstrate that although not a replacement for natural resources, artificial structures, when combined with natural vegetation, could contribute significantly to the survival of urban birds. Conservation practitioners could encourage urban mosaic landscapes of built and green spaces to conserve and restore populations of birds.
{"title":"Comparative use of artificial structures and natural vegetation by birds in a built-up urban area in Ghana","authors":"Joseph K. Afrifa, Justus P. Deikumah, K. Monney","doi":"10.5751/ace-02351-180106","DOIUrl":"https://doi.org/10.5751/ace-02351-180106","url":null,"abstract":". Our understanding of how birds use human supplementary resources, especially artificial structures and patchy vegetation within urban areas, is limited. Our study compared the use of artificial structures versus natural vegetation by birds in built-up areas in the Cape Coast Metropolitan Assembly (CCMA) in the central region of Ghana. Using point count technique, we recorded bird species and the activities performed as well as the substrates they use in residential and commercial areas within the CCMA. We found that the mean bird abundance that used artificial structures did not differ significantly from those that used natural vegetation. The mean species richness that used artificial structures was found to differ significantly from those that used natural vegetation. The study also found a significant difference in activities performed by bird species and the substrate type used for daily life activities. Across species, birds showed preference for trees, shrubs, and natural vegetation structures for perching, feeding, and singing, whereas artificial structures such as billboards, telecommunication masts, ceilings of buildings, pylons, buildings, opening in street lights, and windows of buildings were preferred for nesting. These results demonstrate that although not a replacement for natural resources, artificial structures, when combined with natural vegetation, could contribute significantly to the survival of urban birds. Conservation practitioners could encourage urban mosaic landscapes of built and green spaces to conserve and restore populations of birds.","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70963535","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 : 2023-01-01DOI: 10.5751/ace-02357-180104
Kristin Bianchini, Douglas C. Tozer
. The elusive nature of many marsh-breeding birds presents a challenge for effective population monitoring. The Great Lakes Marsh Monitoring Program (GLMMP), delivered by Birds Canada, addressed these challenges by concentrating survey efforts in marsh bird habitats and by using survey protocols aimed at maximizing marsh bird detections. GLMMP data suggest that numerous marsh bird species are declining. Here we consider the value of other avian monitoring programs to support our understanding of marsh bird population trends. Our goal was to compare the GLMMP, North American Breeding Bird Survey (BBS), and eBird with each other and with a combined survey, by evaluating frequency of detection, annual indices of abundance, and trend estimates. Using 23 years (1997–2019) of GLMMP, BBS, and eBird data, we calculated annual indices of abundance and trends for each survey for 18 marsh-breeding species across southern Ontario, Canada. We found that the GLMMP had more frequent detections, greater counts, and/or more precise trends for 8 species that breed almost exclusively in marshes, whereas 10 species with more variable habitat preferences had more frequent detections, greater counts, and/or more precise trends based on eBird and/or BBS. We found that combining counts from the GLMMP, BBS, and eBird increased the precision around trend estimates for 11/18 (61%) species; however, trend estimates for combined data tended to be positively biased relative to GLMMP trends for species that also frequent non-marsh habitats. We, therefore, provide evidence that combining citizen science data from multiple sources could increase the power to detect changes in marsh-dependent bird populations. Integrated datasets thus provide a promising avenue for future marsh bird conservation and management
{"title":"Using Breeding Bird Survey and eBird data to improve marsh bird monitoring abundance indices and trends","authors":"Kristin Bianchini, Douglas C. Tozer","doi":"10.5751/ace-02357-180104","DOIUrl":"https://doi.org/10.5751/ace-02357-180104","url":null,"abstract":". The elusive nature of many marsh-breeding birds presents a challenge for effective population monitoring. The Great Lakes Marsh Monitoring Program (GLMMP), delivered by Birds Canada, addressed these challenges by concentrating survey efforts in marsh bird habitats and by using survey protocols aimed at maximizing marsh bird detections. GLMMP data suggest that numerous marsh bird species are declining. Here we consider the value of other avian monitoring programs to support our understanding of marsh bird population trends. Our goal was to compare the GLMMP, North American Breeding Bird Survey (BBS), and eBird with each other and with a combined survey, by evaluating frequency of detection, annual indices of abundance, and trend estimates. Using 23 years (1997–2019) of GLMMP, BBS, and eBird data, we calculated annual indices of abundance and trends for each survey for 18 marsh-breeding species across southern Ontario, Canada. We found that the GLMMP had more frequent detections, greater counts, and/or more precise trends for 8 species that breed almost exclusively in marshes, whereas 10 species with more variable habitat preferences had more frequent detections, greater counts, and/or more precise trends based on eBird and/or BBS. We found that combining counts from the GLMMP, BBS, and eBird increased the precision around trend estimates for 11/18 (61%) species; however, trend estimates for combined data tended to be positively biased relative to GLMMP trends for species that also frequent non-marsh habitats. We, therefore, provide evidence that combining citizen science data from multiple sources could increase the power to detect changes in marsh-dependent bird populations. Integrated datasets thus provide a promising avenue for future marsh bird conservation and management","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"53 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70963099","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 : 2023-01-01DOI: 10.5751/ace-02395-180107
J. Cruz, S. Windels, W. Thogmartin, S. Crimmins, B. Zuckerberg
,
，
{"title":"Survival of Common Loon chicks appears unaffected by Bald Eagle recovery in northern Minnesota","authors":"J. Cruz, S. Windels, W. Thogmartin, S. Crimmins, B. Zuckerberg","doi":"10.5751/ace-02395-180107","DOIUrl":"https://doi.org/10.5751/ace-02395-180107","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70963239","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 : 2023-01-01DOI: 10.5751/ace-02366-180115
K. Heide, L. Friesen, V. Martin, E. Cheskey, Michael D. Cadman, D. Norris
,
，
{"title":"Before-and-after evidence that urbanization contributes to the decline of a migratory songbird","authors":"K. Heide, L. Friesen, V. Martin, E. Cheskey, Michael D. Cadman, D. Norris","doi":"10.5751/ace-02366-180115","DOIUrl":"https://doi.org/10.5751/ace-02366-180115","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70963268","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 : 2023-01-01DOI: 10.5751/ace-02457-180125
Jennifer K. Meineke, F. Doyle, K. Hodges
,
，
{"title":"Raptors benefit from biosolids applications on rangelands","authors":"Jennifer K. Meineke, F. Doyle, K. Hodges","doi":"10.5751/ace-02457-180125","DOIUrl":"https://doi.org/10.5751/ace-02457-180125","url":null,"abstract":",","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70964012","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 : 2023-01-01DOI: 10.5751/ace-02150-180207
Lauren Solomon, Antonio Celis-Murillo, Michael Ward, Jill Deppe
Nearctic Neotropical migratory songbirds incur the highest mortality during migration. En-route, songbirds rely on a network of stopover sites to rest, refuel, and/or seek refuge during poor weather. Conservation strategies prioritize protection of sites that best meet these needs. However, the specific function of a stopover site is expected to vary in relation to factors, such as geographic location, surrounding landscape, and weather. To identify sites with the highest conservation value for migratory songbirds, a conceptual framework was independently developed to classify sites into three functional categories based on their geographic and landscape features: fire escapes, convenience stores, and full-service hotels. The few attempts to empirically validate this framework have focused on temperate stopover sites. We evaluated the framework by testing the hypothesis that a site’s geographic and landscape characteristics can predict its function. We used capture and radio-tracking data at an island and mainland site in the Yucatan Peninsula, Mexico to quantify mean and variance in daily capture rate, body condition, stopover duration, and departure behavior during autumn, with a focus on four species: Swainson’s Thrush (Catharus ustulatus), Red-eyed Vireo (Vireo olivaceus), Gray Catbird (Dumetella carolinensis), and Prothonotary Warbler (Protonotaria citrea). Our results supported our predictions that the island functions as a fire escape, providing refuge for very high numbers of birds after encountering crosswinds or headwinds over the Gulf of Mexico, and the mainland forest site serves as a full-service hotel. The framework provides valuable insight for strategic conservation planning and management of stopover sites for songbirds. We suggest future studies evaluate the framework’s application to non-forest bird species. Additionally, we encourage collaborative efforts to consolidate and integrate tracking data, capture data from migration banding stations, and radar-based bird density estimates across a broad geography to test the framework’s ability to inform conservation planning across species’ full migratory range.
{"title":"Full-service hotels, convenience stores, or fire escapes? Evaluating the functional role of stopover sites for Neotropical migrants following passage across the Gulf of Mexico in autumn","authors":"Lauren Solomon, Antonio Celis-Murillo, Michael Ward, Jill Deppe","doi":"10.5751/ace-02150-180207","DOIUrl":"https://doi.org/10.5751/ace-02150-180207","url":null,"abstract":"Nearctic Neotropical migratory songbirds incur the highest mortality during migration. En-route, songbirds rely on a network of stopover sites to rest, refuel, and/or seek refuge during poor weather. Conservation strategies prioritize protection of sites that best meet these needs. However, the specific function of a stopover site is expected to vary in relation to factors, such as geographic location, surrounding landscape, and weather. To identify sites with the highest conservation value for migratory songbirds, a conceptual framework was independently developed to classify sites into three functional categories based on their geographic and landscape features: fire escapes, convenience stores, and full-service hotels. The few attempts to empirically validate this framework have focused on temperate stopover sites. We evaluated the framework by testing the hypothesis that a site’s geographic and landscape characteristics can predict its function. We used capture and radio-tracking data at an island and mainland site in the Yucatan Peninsula, Mexico to quantify mean and variance in daily capture rate, body condition, stopover duration, and departure behavior during autumn, with a focus on four species: Swainson’s Thrush (<em>Catharus ustulatus</em>), Red-eyed Vireo (<em>Vireo olivaceus</em>), Gray Catbird (<em>Dumetella carolinensis</em>), and Prothonotary Warbler (<em>Protonotaria citrea</em>). Our results supported our predictions that the island functions as a fire escape, providing refuge for very high numbers of birds after encountering crosswinds or headwinds over the Gulf of Mexico, and the mainland forest site serves as a full-service hotel. The framework provides valuable insight for strategic conservation planning and management of stopover sites for songbirds. We suggest future studies evaluate the framework’s application to non-forest bird species. Additionally, we encourage collaborative efforts to consolidate and integrate tracking data, capture data from migration banding stations, and radar-based bird density estimates across a broad geography to test the framework’s ability to inform conservation planning across species’ full migratory range.","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135442392","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 : 2023-01-01DOI: 10.5751/ace-02370-180111
I. Pollet, Ariel K. Lenske, A. Ausems, C. Barbraud, Y. Bedolla-Guzmán, A. Bicknell, M. Bolton, Alexander Bond, K. Delord, A. Diamond, D. Fifield, C. Gjerdrum, Luke R. Halpin, E. Hansen, A. Hedd, Rielle Hoeg, H. Major, R. Mauck, G. McClelland, L. M. Mcfarlane Tranquilla, W. Montevecchi, M. Parker, I. Pratte, Jean-François Rail, G. Robertson, J. Rock, Robert A. Ronconi, D. Shutler, I. Stenhouse, A. Takahashi, Yukata Watanuki, L. Welch, S. Wilhelm, Sarah Wong, M. Mallory
. Seabirds are declining globally, though the threats they face differ among and within species and populations. Following substantial population declines at several breeding colonies, Leach’s Storm-Petrel ( Hydrobates leucorhous ) was uplisted from Least Concern to Vulnerable by the International Union for Conservation of Nature (IUCN) in 2016. Reasons for these declines are unclear
{"title":"Experts’ opinions on threats to Leach’s Storm-Petrels ( Hydrobates leucorhous ) across their global range","authors":"I. Pollet, Ariel K. Lenske, A. Ausems, C. Barbraud, Y. Bedolla-Guzmán, A. Bicknell, M. Bolton, Alexander Bond, K. Delord, A. Diamond, D. Fifield, C. Gjerdrum, Luke R. Halpin, E. Hansen, A. Hedd, Rielle Hoeg, H. Major, R. Mauck, G. McClelland, L. M. Mcfarlane Tranquilla, W. Montevecchi, M. Parker, I. Pratte, Jean-François Rail, G. Robertson, J. Rock, Robert A. Ronconi, D. Shutler, I. Stenhouse, A. Takahashi, Yukata Watanuki, L. Welch, S. Wilhelm, Sarah Wong, M. Mallory","doi":"10.5751/ace-02370-180111","DOIUrl":"https://doi.org/10.5751/ace-02370-180111","url":null,"abstract":". Seabirds are declining globally, though the threats they face differ among and within species and populations. Following substantial population declines at several breeding colonies, Leach’s Storm-Petrel ( Hydrobates leucorhous ) was uplisted from Least Concern to Vulnerable by the International Union for Conservation of Nature (IUCN) in 2016. Reasons for these declines are unclear","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70963358","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 : 2023-01-01DOI: 10.5751/ace-02453-180120
Breanna E. Pyott, L. Meads, A. Froese, S. Petersen, A. Mitchell, A. Schulte-Hostedde
. Quantitatively evaluating and monitoring augmentation efforts are critical for conservation success. We formally evaluated the success of two Western Burrowing Owl ( Athene cunicularia hypugaea ) population augmentation programs in Manitoba and British Columbia by assessing survival of breeding adults, fledging success, and return rates of fledglings. Manitoba’s head-starting program holds hatching year (HY) owls taken from the nests of previous captive-released pairs over winter. After being overwintered in human care, the HY owls are released in pairs as second year (SY) owls. British Columbia has a breeding and release program where owls are bred in facilities; their offspring are then held over winter, paired and soft-released in the spring. Both programs soft-release SY pairs that lay clutches in situ and young are referred to as “wild-hatched owls.” We investigated both individual owl and release site characteristics in relation to our success metrics. In Manitoba, breeding season survival averaged 81%, but no factors investigated had a significant effect on
{"title":"Evaluating captive-release strategies for the Western Burrowing Owl ( Athene cunicularia hypugaea )","authors":"Breanna E. Pyott, L. Meads, A. Froese, S. Petersen, A. Mitchell, A. Schulte-Hostedde","doi":"10.5751/ace-02453-180120","DOIUrl":"https://doi.org/10.5751/ace-02453-180120","url":null,"abstract":". Quantitatively evaluating and monitoring augmentation efforts are critical for conservation success. We formally evaluated the success of two Western Burrowing Owl ( Athene cunicularia hypugaea ) population augmentation programs in Manitoba and British Columbia by assessing survival of breeding adults, fledging success, and return rates of fledglings. Manitoba’s head-starting program holds hatching year (HY) owls taken from the nests of previous captive-released pairs over winter. After being overwintered in human care, the HY owls are released in pairs as second year (SY) owls. British Columbia has a breeding and release program where owls are bred in facilities; their offspring are then held over winter, paired and soft-released in the spring. Both programs soft-release SY pairs that lay clutches in situ and young are referred to as “wild-hatched owls.” We investigated both individual owl and release site characteristics in relation to our success metrics. In Manitoba, breeding season survival averaged 81%, but no factors investigated had a significant effect on","PeriodicalId":49233,"journal":{"name":"Avian Conservation and Ecology","volume":"54 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70963896","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：