M. T. Oropeza-Sánchez, I. Suazo‐Ortuño, J. Benítez‐Malvido, R. Munguía‐Steyer
{"title":"Occupancy models including local and landscape variables are useful to assess the distribution of a salamander species at risk","authors":"M. T. Oropeza-Sánchez, I. Suazo‐Ortuño, J. Benítez‐Malvido, R. Munguía‐Steyer","doi":"10.1002/1438-390X.12078","DOIUrl":"https://doi.org/10.1002/1438-390X.12078","url":null,"abstract":"","PeriodicalId":54597,"journal":{"name":"Population Ecology","volume":"63 1","pages":"165-176"},"PeriodicalIF":1.7,"publicationDate":"2021-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1438-390X.12078","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44743617","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}
{"title":"Genetic effects of eelgrass restoration efforts by fishers' seeding to recover seagrass beds as an important natural capital for coastal ecosystem services","authors":"Masakazu Hori, Masaaki Sato","doi":"10.1002/1438-390X.12073","DOIUrl":"https://doi.org/10.1002/1438-390X.12073","url":null,"abstract":"","PeriodicalId":54597,"journal":{"name":"Population Ecology","volume":"161 1","pages":"92-101"},"PeriodicalIF":1.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1438-390X.12073","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50737201","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}
{"title":"Message from the new Editor‐in‐Chief","authors":"A. Yamauchi","doi":"10.1002/1438-390X.12077","DOIUrl":"https://doi.org/10.1002/1438-390X.12077","url":null,"abstract":"","PeriodicalId":54597,"journal":{"name":"Population Ecology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1438-390X.12077","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45804648","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}
Funding information University of Illinois; World Wildlife Fund; Ontario Ministry of Natural Resources; Parks Canada; Natural Sciences and Engineering Research Council of Canada Abstract Dispersal is one of the most fundamental components of ecology. Dispersal is also particularly relevant in an era of unprecedented habitat loss and climate change. We used a unique dataset to examine dispersal in gray ratsnakes (Pantherophis spiloides). Over a decade, we marked and released >1,500 hatchlings while monitoring the population of ratsnakes over a large area (≈1,900 ha). We tested the hypotheses that dispersal should be (a) largely restricted to within the local population given previous genetic evidence of limited gene flow at greater distances and (b) male biased because male gray ratsnakes are under strong sexual selection. We recaptured 69 gray ratsnakes that had been marked as hatchlings after periods ranging from 1 day to 11 years. We found that dispersal distance increased with time, but was not significantly sexbiased, and that gray ratsnakes are extremely faithful to their communal hibernacula (only 2.8% of 497 juvenile and adult ratsnakes captured at least twice at communal hibernacula changed sites between years). Thus, dispersal is largely limited to the period from hatching until an individual joins a communal hibernaculum. Based on the spatial patterns of dispersal we observed, the most plausible explanation for dispersal is that hatchling ratsnakes disperse from their natal site to join a neighboring communal hibernaculum. Our study yielded the most reliable data on dispersal distances from birth by a snake to date.
{"title":"Dispersal by gray ratsnakes: Effects of sex, age and time","authors":"G. Blouin‐Demers","doi":"10.1002/1438-390x.12072","DOIUrl":"https://doi.org/10.1002/1438-390x.12072","url":null,"abstract":"Funding information University of Illinois; World Wildlife Fund; Ontario Ministry of Natural Resources; Parks Canada; Natural Sciences and Engineering Research Council of Canada Abstract Dispersal is one of the most fundamental components of ecology. Dispersal is also particularly relevant in an era of unprecedented habitat loss and climate change. We used a unique dataset to examine dispersal in gray ratsnakes (Pantherophis spiloides). Over a decade, we marked and released >1,500 hatchlings while monitoring the population of ratsnakes over a large area (≈1,900 ha). We tested the hypotheses that dispersal should be (a) largely restricted to within the local population given previous genetic evidence of limited gene flow at greater distances and (b) male biased because male gray ratsnakes are under strong sexual selection. We recaptured 69 gray ratsnakes that had been marked as hatchlings after periods ranging from 1 day to 11 years. We found that dispersal distance increased with time, but was not significantly sexbiased, and that gray ratsnakes are extremely faithful to their communal hibernacula (only 2.8% of 497 juvenile and adult ratsnakes captured at least twice at communal hibernacula changed sites between years). Thus, dispersal is largely limited to the period from hatching until an individual joins a communal hibernaculum. Based on the spatial patterns of dispersal we observed, the most plausible explanation for dispersal is that hatchling ratsnakes disperse from their natal site to join a neighboring communal hibernaculum. Our study yielded the most reliable data on dispersal distances from birth by a snake to date.","PeriodicalId":54597,"journal":{"name":"Population Ecology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1438-390x.12072","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48291058","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}
Correspondence Etienne Rouby, Centre d'études Biologiques de Chizé, UMR 7372, Villiersen-Bois, France. Email: etienne.rouby@univ-lr.fr Abstract Many long-lived vertebrate species are under threat in the Anthropocene, but their conservation is hampered by a lack of demographic information to assess population long-term viability. When longitudinal studies (e.g., Capture-MarkRecapture design) are not feasible, the only available data may be cross-sectional, for example, stranding for marine mammals. Survival analysis deals with age at death (i.e., time to event) data and allows to estimate survivorship and hazard rates assuming that the cross-sectional sample is representative. Accommodating a bathtub-shaped hazard, as expected in wild populations, was historically difficult and required specific models. We identified a simple linear regression model with individual frailty that can fit a bathtub-shaped hazard, take into account covariates, allow goodness-of-fit assessments and give accurate estimates of survivorship in realistic settings. We first conducted a Monte Carlo study and simulated age at death data to assess the accuracy of estimates with respect to sample size. Secondly, we applied this framework on a handful of case studies from published studies on marine mammals, a group with many threatened and data-deficient species. We found that our framework is flexible and accurate to estimate survivorship with a sample size of 300. This approach is promising for obtaining important demographic information on data-poor species.
{"title":"Flexible parametric modeling of survival from age at death data: A mixed linear regression framework","authors":"E. Rouby, V. Ridoux, M. Authier","doi":"10.1002/1438-390x.12069","DOIUrl":"https://doi.org/10.1002/1438-390x.12069","url":null,"abstract":"Correspondence Etienne Rouby, Centre d'études Biologiques de Chizé, UMR 7372, Villiersen-Bois, France. Email: etienne.rouby@univ-lr.fr Abstract Many long-lived vertebrate species are under threat in the Anthropocene, but their conservation is hampered by a lack of demographic information to assess population long-term viability. When longitudinal studies (e.g., Capture-MarkRecapture design) are not feasible, the only available data may be cross-sectional, for example, stranding for marine mammals. Survival analysis deals with age at death (i.e., time to event) data and allows to estimate survivorship and hazard rates assuming that the cross-sectional sample is representative. Accommodating a bathtub-shaped hazard, as expected in wild populations, was historically difficult and required specific models. We identified a simple linear regression model with individual frailty that can fit a bathtub-shaped hazard, take into account covariates, allow goodness-of-fit assessments and give accurate estimates of survivorship in realistic settings. We first conducted a Monte Carlo study and simulated age at death data to assess the accuracy of estimates with respect to sample size. Secondly, we applied this framework on a handful of case studies from published studies on marine mammals, a group with many threatened and data-deficient species. We found that our framework is flexible and accurate to estimate survivorship with a sample size of 300. This approach is promising for obtaining important demographic information on data-poor species.","PeriodicalId":54597,"journal":{"name":"Population Ecology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1438-390x.12069","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49572182","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}
{"title":"Macrogeographic variation of a pond predator's top‐down effects in a common garden environment","authors":"K. M. Stemp, T. Anderson, J. Davenport","doi":"10.1002/1438-390x.12071","DOIUrl":"https://doi.org/10.1002/1438-390x.12071","url":null,"abstract":"","PeriodicalId":54597,"journal":{"name":"Population Ecology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1438-390x.12071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46858938","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}
{"title":"Comparison of asymptotic population growth rates with heterogeneous variances","authors":"J. Arrontes","doi":"10.1002/1438-390x.12070","DOIUrl":"https://doi.org/10.1002/1438-390x.12070","url":null,"abstract":"","PeriodicalId":54597,"journal":{"name":"Population Ecology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1438-390x.12070","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46474529","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}
Yasutoki Shibata, J. Nagao, Y. Narimatsu, Eisuke Morikawa, Yuto Suzuki, Shun Tokioka, Manabu Yamada, S. Kakehi, H. Okamura
{"title":"Estimating the maximum sustainable yield of snow crab (\u0000 \u0000 Chionoecetes opilio\u0000 \u0000 ) off Tohoku, Japan via a state‐space stock assessment model with time‐varying natural mortality","authors":"Yasutoki Shibata, J. Nagao, Y. Narimatsu, Eisuke Morikawa, Yuto Suzuki, Shun Tokioka, Manabu Yamada, S. Kakehi, H. Okamura","doi":"10.1002/1438-390x.12068","DOIUrl":"https://doi.org/10.1002/1438-390x.12068","url":null,"abstract":"","PeriodicalId":54597,"journal":{"name":"Population Ecology","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/1438-390x.12068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47302526","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}
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