Nest survival and productivity of translocated and resident burrowing owls in Arizona

Development activities associated with urbanization can directly displace animals, causing high mortality and dispersal rates. Wildlife managers have attempted to mitigate the impacts of development on burrowing owls (Athene cunicularia), a species susceptible to ground‐disturbing activities, by tra...

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Veröffentlicht in:The Journal of wildlife management 2023-01, Vol.87 (1), p.n/a
Hauptverfasser: Doublet, Dejeanne, Johnson, David H., Abadi, Fitsum, Desmond, Martha J.
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Abadi, Fitsum
Desmond, Martha J.
description Development activities associated with urbanization can directly displace animals, causing high mortality and dispersal rates. Wildlife managers have attempted to mitigate the impacts of development on burrowing owls (Athene cunicularia), a species susceptible to ground‐disturbing activities, by translocating them away from areas slated for development. In this study, we evaluated the effects of translocation on burrowing owl reproduction by comparing nest survival and productivity of owls involved in an ongoing translocation program in Arizona, USA, with that of resident owls. We used nest survival models to evaluate differences in nest survival and generalized linear models with Poisson error to assess differences in productivity. In 2017, cumulative nest survival (CNS) was lower among current‐year translocated owls (i.e., owls translocated within the last year; CNS = 0.34, 95% CI = 0.18, 0.51) compared to non‐translocated resident owls (0.83, 95% CI = 0.71, 0.94), but CNS was similar between previously translocated owls (i.e., those translocated >1 yr ago, CNS = 0.81, 95% CI = 0.64, 0.98) and residents. Likewise, in 2018, CNS was lower for current‐year translocated owls (CNS = 0.12, 95% CI = 0.00, 0.24) compared to residents (CNS = 0.68, 95% CI = 0.50, 0.87) and previously translocated owls (CNS = 0.65, 95% CI = 0.40, 0.90). Productivity was significantly lower for current‐year translocated owls (x ̅ $\mathop{x}\limits^{̅}$ = 0.5 fledglings/nest) compared to residents (x ̅ $\mathop{x}\limits^{̅}$ = 2.4 fledglings/nest) and previously translocated owls (x ̅ $\mathop{x}\limits^{̅}$ = 1.5 fledglings/nest) across sites and years. With the current methods of translocation, owls had poor reproductive success in the first year after release, but if they survived 2 years after release, they had similar nest survival and productivity compared to residents. Our results demonstrate that the current practice of releasing translocated burrowing owls in the Phoenix, Arizona area during the breeding season depresses reproduction and should be substantially changed. Nest survival was low and this was mainly attributed to nest establishment of translocated owls within release tents (acclimation structures used in translocations that involve soft release) where 85% of nests failed following tent removal. Translocation approaches that reflect a closer fit to the timing and behavior of the species should be tested to determine whether they result in better success. In part
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Wildlife managers have attempted to mitigate the impacts of development on burrowing owls (Athene cunicularia), a species susceptible to ground‐disturbing activities, by translocating them away from areas slated for development. In this study, we evaluated the effects of translocation on burrowing owl reproduction by comparing nest survival and productivity of owls involved in an ongoing translocation program in Arizona, USA, with that of resident owls. We used nest survival models to evaluate differences in nest survival and generalized linear models with Poisson error to assess differences in productivity. In 2017, cumulative nest survival (CNS) was lower among current‐year translocated owls (i.e., owls translocated within the last year; CNS = 0.34, 95% CI = 0.18, 0.51) compared to non‐translocated resident owls (0.83, 95% CI = 0.71, 0.94), but CNS was similar between previously translocated owls (i.e., those translocated &gt;1 yr ago, CNS = 0.81, 95% CI = 0.64, 0.98) and residents. Likewise, in 2018, CNS was lower for current‐year translocated owls (CNS = 0.12, 95% CI = 0.00, 0.24) compared to residents (CNS = 0.68, 95% CI = 0.50, 0.87) and previously translocated owls (CNS = 0.65, 95% CI = 0.40, 0.90). Productivity was significantly lower for current‐year translocated owls (x ̅ $\mathop{x}\limits^{̅}$ = 0.5 fledglings/nest) compared to residents (x ̅ $\mathop{x}\limits^{̅}$ = 2.4 fledglings/nest) and previously translocated owls (x ̅ $\mathop{x}\limits^{̅}$ = 1.5 fledglings/nest) across sites and years. With the current methods of translocation, owls had poor reproductive success in the first year after release, but if they survived 2 years after release, they had similar nest survival and productivity compared to residents. Our results demonstrate that the current practice of releasing translocated burrowing owls in the Phoenix, Arizona area during the breeding season depresses reproduction and should be substantially changed. Nest survival was low and this was mainly attributed to nest establishment of translocated owls within release tents (acclimation structures used in translocations that involve soft release) where 85% of nests failed following tent removal. Translocation approaches that reflect a closer fit to the timing and behavior of the species should be tested to determine whether they result in better success. In particular, future studies should examine the translocation results of releasing owls as male‐female pairs or single birds during the nonbreeding period. Current‐year translocated burrowing owls (&lt;1 yr post translocation) had lower nest survival estimates compared to resident owls, whereas previously translocated owls (&gt;1 yr post translocation) reproduced at similar rates to residents. These findings suggest that translocated owls can assimilate into their new environments if they survive and remain at release sites through the first year of release. 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Wildlife managers have attempted to mitigate the impacts of development on burrowing owls (Athene cunicularia), a species susceptible to ground‐disturbing activities, by translocating them away from areas slated for development. In this study, we evaluated the effects of translocation on burrowing owl reproduction by comparing nest survival and productivity of owls involved in an ongoing translocation program in Arizona, USA, with that of resident owls. We used nest survival models to evaluate differences in nest survival and generalized linear models with Poisson error to assess differences in productivity. In 2017, cumulative nest survival (CNS) was lower among current‐year translocated owls (i.e., owls translocated within the last year; CNS = 0.34, 95% CI = 0.18, 0.51) compared to non‐translocated resident owls (0.83, 95% CI = 0.71, 0.94), but CNS was similar between previously translocated owls (i.e., those translocated &gt;1 yr ago, CNS = 0.81, 95% CI = 0.64, 0.98) and residents. Likewise, in 2018, CNS was lower for current‐year translocated owls (CNS = 0.12, 95% CI = 0.00, 0.24) compared to residents (CNS = 0.68, 95% CI = 0.50, 0.87) and previously translocated owls (CNS = 0.65, 95% CI = 0.40, 0.90). Productivity was significantly lower for current‐year translocated owls (x ̅ $\mathop{x}\limits^{̅}$ = 0.5 fledglings/nest) compared to residents (x ̅ $\mathop{x}\limits^{̅}$ = 2.4 fledglings/nest) and previously translocated owls (x ̅ $\mathop{x}\limits^{̅}$ = 1.5 fledglings/nest) across sites and years. With the current methods of translocation, owls had poor reproductive success in the first year after release, but if they survived 2 years after release, they had similar nest survival and productivity compared to residents. Our results demonstrate that the current practice of releasing translocated burrowing owls in the Phoenix, Arizona area during the breeding season depresses reproduction and should be substantially changed. Nest survival was low and this was mainly attributed to nest establishment of translocated owls within release tents (acclimation structures used in translocations that involve soft release) where 85% of nests failed following tent removal. Translocation approaches that reflect a closer fit to the timing and behavior of the species should be tested to determine whether they result in better success. In particular, future studies should examine the translocation results of releasing owls as male‐female pairs or single birds during the nonbreeding period. Current‐year translocated burrowing owls (&lt;1 yr post translocation) had lower nest survival estimates compared to resident owls, whereas previously translocated owls (&gt;1 yr post translocation) reproduced at similar rates to residents. These findings suggest that translocated owls can assimilate into their new environments if they survive and remain at release sites through the first year of release. Changes to release methods that include releasing owls as pairs or single individuals in the non‐breeding season should increase nest survival for current‐year translocated owls.</description><subject>Acclimation</subject><subject>Acclimatization</subject><subject>Arizona</subject><subject>Athene cunicularia</subject><subject>Breeding</subject><subject>Breeding seasons</subject><subject>Breeding success</subject><subject>burrowing owl</subject><subject>Evaluation</subject><subject>Generalized linear models</subject><subject>Juveniles</subject><subject>nest survival</subject><subject>Nests</subject><subject>Owls</subject><subject>Productivity</subject><subject>Reproduction</subject><subject>Statistical models</subject><subject>Survival</subject><subject>Translocation</subject><subject>Urbanization</subject><subject>Wildlife</subject><subject>Wildlife management</subject><issn>0022-541X</issn><issn>1937-2817</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><recordid>eNp9kLtOwzAUhi0EEqWw8ASW2JBSfImTeKwqKKACCxVslmM7las0LnbSqH163IaZ6QznO5f_A-AWowlGiDys-81qQgil_AyMMKd5Qgqcn4NRbJKEpfj7ElyFsEaIYlxkI7B8N6GFofM7u5M1lI2GW-90p1q7s-0eugq2Xjahdkq2Rp8Ab4LVpmlh2XnvetusoOvrAG0Dp94eXCOvwUUl62Bu_uoYLJ8eP2fPyeJj_jKbLhJFKOYJ10WBcInSEmdVxiuUUkwRZzEAK6khuipSqgquKEFGZSliSpE0J1oaxogq6RjcDXvjzz9dTCLWrvNNPClIzijnFGUsUvcDpbwLwZtKbL3dSL8XGImjNnHUJk7aIowHuLe12f9Ditevt_kw8wtDEm_9</recordid><startdate>202301</startdate><enddate>202301</enddate><creator>Doublet, Dejeanne</creator><creator>Johnson, David H.</creator><creator>Abadi, Fitsum</creator><creator>Desmond, Martha J.</creator><general>Blackwell Publishing Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7QL</scope><scope>7SN</scope><scope>7ST</scope><scope>7T7</scope><scope>7U6</scope><scope>7U9</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H94</scope><scope>M7N</scope><scope>P64</scope><orcidid>https://orcid.org/0000-0002-1952-5435</orcidid></search><sort><creationdate>202301</creationdate><title>Nest survival and productivity of translocated and resident burrowing owls in Arizona</title><author>Doublet, Dejeanne ; Johnson, David H. ; Abadi, Fitsum ; Desmond, Martha J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2319-9d8801b04b16f69f043130952235b3e2df843c89c320ec6405cc2472dae552cb3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Acclimation</topic><topic>Acclimatization</topic><topic>Arizona</topic><topic>Athene cunicularia</topic><topic>Breeding</topic><topic>Breeding seasons</topic><topic>Breeding success</topic><topic>burrowing owl</topic><topic>Evaluation</topic><topic>Generalized linear models</topic><topic>Juveniles</topic><topic>nest survival</topic><topic>Nests</topic><topic>Owls</topic><topic>Productivity</topic><topic>Reproduction</topic><topic>Statistical models</topic><topic>Survival</topic><topic>Translocation</topic><topic>Urbanization</topic><topic>Wildlife</topic><topic>Wildlife management</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Doublet, Dejeanne</creatorcontrib><creatorcontrib>Johnson, David H.</creatorcontrib><creatorcontrib>Abadi, Fitsum</creatorcontrib><creatorcontrib>Desmond, Martha J.</creatorcontrib><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Ecology Abstracts</collection><collection>Environment Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Sustainability Science Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>The Journal of wildlife management</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Doublet, Dejeanne</au><au>Johnson, David H.</au><au>Abadi, Fitsum</au><au>Desmond, Martha J.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Nest survival and productivity of translocated and resident burrowing owls in Arizona</atitle><jtitle>The Journal of wildlife management</jtitle><date>2023-01</date><risdate>2023</risdate><volume>87</volume><issue>1</issue><epage>n/a</epage><issn>0022-541X</issn><eissn>1937-2817</eissn><abstract>Development activities associated with urbanization can directly displace animals, causing high mortality and dispersal rates. Wildlife managers have attempted to mitigate the impacts of development on burrowing owls (Athene cunicularia), a species susceptible to ground‐disturbing activities, by translocating them away from areas slated for development. In this study, we evaluated the effects of translocation on burrowing owl reproduction by comparing nest survival and productivity of owls involved in an ongoing translocation program in Arizona, USA, with that of resident owls. We used nest survival models to evaluate differences in nest survival and generalized linear models with Poisson error to assess differences in productivity. In 2017, cumulative nest survival (CNS) was lower among current‐year translocated owls (i.e., owls translocated within the last year; CNS = 0.34, 95% CI = 0.18, 0.51) compared to non‐translocated resident owls (0.83, 95% CI = 0.71, 0.94), but CNS was similar between previously translocated owls (i.e., those translocated &gt;1 yr ago, CNS = 0.81, 95% CI = 0.64, 0.98) and residents. Likewise, in 2018, CNS was lower for current‐year translocated owls (CNS = 0.12, 95% CI = 0.00, 0.24) compared to residents (CNS = 0.68, 95% CI = 0.50, 0.87) and previously translocated owls (CNS = 0.65, 95% CI = 0.40, 0.90). Productivity was significantly lower for current‐year translocated owls (x ̅ $\mathop{x}\limits^{̅}$ = 0.5 fledglings/nest) compared to residents (x ̅ $\mathop{x}\limits^{̅}$ = 2.4 fledglings/nest) and previously translocated owls (x ̅ $\mathop{x}\limits^{̅}$ = 1.5 fledglings/nest) across sites and years. With the current methods of translocation, owls had poor reproductive success in the first year after release, but if they survived 2 years after release, they had similar nest survival and productivity compared to residents. Our results demonstrate that the current practice of releasing translocated burrowing owls in the Phoenix, Arizona area during the breeding season depresses reproduction and should be substantially changed. Nest survival was low and this was mainly attributed to nest establishment of translocated owls within release tents (acclimation structures used in translocations that involve soft release) where 85% of nests failed following tent removal. Translocation approaches that reflect a closer fit to the timing and behavior of the species should be tested to determine whether they result in better success. In particular, future studies should examine the translocation results of releasing owls as male‐female pairs or single birds during the nonbreeding period. Current‐year translocated burrowing owls (&lt;1 yr post translocation) had lower nest survival estimates compared to resident owls, whereas previously translocated owls (&gt;1 yr post translocation) reproduced at similar rates to residents. These findings suggest that translocated owls can assimilate into their new environments if they survive and remain at release sites through the first year of release. Changes to release methods that include releasing owls as pairs or single individuals in the non‐breeding season should increase nest survival for current‐year translocated owls.</abstract><cop>Bethesda</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/jwmg.22339</doi><tpages>17</tpages><orcidid>https://orcid.org/0000-0002-1952-5435</orcidid></addata></record>
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subjects Acclimation
Acclimatization
Arizona
Athene cunicularia
Breeding
Breeding seasons
Breeding success
burrowing owl
Evaluation
Generalized linear models
Juveniles
nest survival
Nests
Owls
Productivity
Reproduction
Statistical models
Survival
Translocation
Urbanization
Wildlife
Wildlife management
title Nest survival and productivity of translocated and resident burrowing owls in Arizona
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