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  1. AU="Michael E. Dorcas"
  2. AU="Oliveira, Fernando Rocha de"
  3. AU="Rossmanith, R."
  4. AU="Xi He"
  5. AU="Somenath Mitra"
  6. AU=Zhao Limei AU=Zhao Limei
  7. AU="Feng, Sheau-Line"
  8. AU="Goldman, Nick"
  9. AU="Oumezzine, Ma"
  10. AU="Elena D. Nosyreva"
  11. AU="Birara, Sunita"
  12. AU=Banegas Matthew P. AU=Banegas Matthew P.
  13. AU="Mendelow, Alexander David"
  14. AU="Pereira, Taci"
  15. AU="Natalie Taylor"
  16. AU="Moradi, Tayebeh"
  17. AU="Ramesh C. Santra"
  18. AU="Selvarajah, Aravinda"
  19. AU="Vaisman, Adva"
  20. AU="Rádiková, Žofia"
  21. AU=Poulin Stphane P.

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  1. Artikel: Behavioural interactions of diamondback terrapins with crab pots demonstrate that bycatch reduction devices reduce entrapment

    McKee, Rebecca K / Kristen K. Cecala / Michael E. Dorcas

    Aquatic conservation. 2016 Dec., v. 26, no. 6

    2016  

    Abstract: Diamondback terrapins (Malaclemys terrapin) have experienced declines throughout their range, and accidental mortality in crab pots is a significant conservation concern. To minimize the risk of terrapins entering crab pots, researchers have suggested ... ...

    Abstract Diamondback terrapins (Malaclemys terrapin) have experienced declines throughout their range, and accidental mortality in crab pots is a significant conservation concern. To minimize the risk of terrapins entering crab pots, researchers have suggested the use of bycatch reduction devices (BRDs) to reduce the size of crab pot openings and thereby exclude terrapins from entering crab pots. Despite these recommendations, few studies have observed terrapin interactions with BRDs and effectively evaluated the efficacy of these devices at preventing the entry of terrapins into pots. The objective of this study was to determine the effect of BRD presence and orientation on terrapin behaviour around crab pots and overall terrapin capture rates. In a controlled laboratory setting, terrapins investigated crab pots more frequently when crab pots were baited with fish versus chicken. Terrapins were captured more frequently when BRDs were not installed. The presence of the BRDs also increased the length of time necessary for a terrapin to enter a crab pot and decreased the proportion of entries relative to the number of investigations. Vertically‐oriented BRDs were more effective than horizontally‐oriented BRDs at reducing terrapin captures. To prevent the continued decline of terrapin populations due to crab fisheries, it is recommended that crabbers avoid the use of fish as bait in crab pots to reduce the attractiveness of pots to terrapins and fit all crab pots with vertically‐oriented BRDs to reduce terrapin entrapment. Copyright © 2015 John Wiley & Sons, Ltd.
    Schlagwörter Malaclemys terrapin ; baits ; bycatch ; chickens ; crab fisheries ; crabs ; fish ; mortality ; risk
    Sprache Englisch
    Erscheinungsverlauf 2016-12
    Umfang p. 1081-1089.
    Erscheinungsort John Wiley & Sons, Ltd
    Dokumenttyp Artikel
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 1146285-1
    ISSN 1052-7613
    ISSN 1052-7613
    DOI 10.1002/aqc.2587
    Datenquelle NAL Katalog (AGRICOLA)

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  2. Artikel: Using citizen science data to identify the sensitivity of species to human land use

    Todd, Brian D / Jonathan P. Rose / Michael E. Dorcas / Steven J. Price

    Conservation biology. 2016 Dec., v. 30, no. 6

    2016  

    Abstract: Conservation practitioners must contend with an increasing array of threats that affect biodiversity. Citizen scientists can provide timely and expansive information for addressing these threats across large scales, but their data may contain sampling ... ...

    Abstract Conservation practitioners must contend with an increasing array of threats that affect biodiversity. Citizen scientists can provide timely and expansive information for addressing these threats across large scales, but their data may contain sampling biases. We used randomization procedures to account for possible sampling biases in opportunistically reported citizen science data to identify species’ sensitivities to human land use. We analyzed 21,044 records of 143 native reptile and amphibian species reported to the Carolina Herp Atlas from North Carolina and South Carolina between 1 January 1990 and 12 July 2014. Sensitive species significantly associated with natural landscapes were 3.4 times more likely to be legally protected or treated as of conservation concern by state resource agencies than less sensitive species significantly associated with human‐dominated landscapes. Many of the species significantly associated with natural landscapes occurred primarily in habitats that had been nearly eradicated or otherwise altered in the Carolinas, including isolated wetlands, longleaf pine savannas, and Appalachian forests. Rare species with few reports were more likely to be associated with natural landscapes and 3.2 times more likely to be legally protected or treated as of conservation concern than species with at least 20 reported occurrences. Our results suggest that opportunistically reported citizen science data can be used to identify sensitive species and that species currently restricted primarily to natural landscapes are likely at greatest risk of decline from future losses of natural habitat. Our approach demonstrates the usefulness of citizen science data in prioritizing conservation and in helping practitioners address species declines and extinctions at large extents.
    Schlagwörter amphibians ; biodiversity ; forests ; habitats ; humans ; land use ; landscapes ; rare species ; reptiles ; risk ; savannas ; scientists ; wetlands ; North Carolina ; South Carolina
    Sprache Englisch
    Erscheinungsverlauf 2016-12
    Umfang p. 1266-1276.
    Erscheinungsort John Wiley & Sons, Ltd
    Dokumenttyp Artikel
    Anmerkung JOURNAL ARTICLE
    ZDB-ID 58735-7
    ISSN 1523-1739 ; 0888-8892
    ISSN (online) 1523-1739
    ISSN 0888-8892
    DOI 10.1111/cobi.12686
    Datenquelle NAL Katalog (AGRICOLA)

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  3. Artikel: The effects of conspecifics on burrow selection in juvenile spotted salamanders (Ambystoma maculatum)

    Greene, Kathryn M / Michael E. Dorcas / Shannon E. Pittman

    Journal of ethology. 2016 Sept., v. 34, no. 3

    2016  

    Abstract: Spotted salamanders (Ambystoma maculatum) are pond-breeding amphibians that disperse into terrestrial habitat from natal wetlands after undergoing metamorphosis, relying on small-mammal burrows and coarse woody debris for refugia. The effect of ... ...

    Abstract Spotted salamanders (Ambystoma maculatum) are pond-breeding amphibians that disperse into terrestrial habitat from natal wetlands after undergoing metamorphosis, relying on small-mammal burrows and coarse woody debris for refugia. The effect of conspecifics on burrow use in juvenile salamanders is poorly understood. Determining how the presence of conspecifics influences the settlement decisions of juvenile salamanders can increase our understanding of amphibian dispersal and our ability to predict population dynamics. We conducted behavioral laboratory trials using 58 recently metamorphosed salamanders to examine how salamanders selected burrows in the presence of conspecifics. Salamanders were more likely to settle in a burrow that was occupied by a conspecific versus an unoccupied burrow. Our results indicate that juvenile salamanders may show conspecific attraction and/or trailing behavior during the dispersal phase.
    Schlagwörter Ambystoma ; burrows ; coarse woody debris ; juveniles ; laboratory experimentation ; metamorphosis ; population dynamics ; refuge habitats ; salamanders and newts ; wetlands
    Sprache Englisch
    Erscheinungsverlauf 2016-09
    Umfang p. 309-314.
    Erscheinungsort Springer Japan
    Dokumenttyp Artikel
    ZDB-ID 2020048-1
    ISSN 1439-5444 ; 0289-0771
    ISSN (online) 1439-5444
    ISSN 0289-0771
    DOI 10.1007/s10164-016-0476-6
    Datenquelle NAL Katalog (AGRICOLA)

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  4. Artikel: The spatial configuration of greenspace affects semi-aquatic turtle occupancy and species richness in a suburban landscape

    Guzy, Jacquelyn C / Michael E. Dorcas / Steven J. Price

    Landscape and urban planning. 2013 Sept., v. 117

    2013  

    Abstract: Within urbanized areas, the importance of greenspaces for wildlife has been widely investigated for some animal groups, but reptiles have generally been neglected. To assess the importance of the amount, spatial distribution, and configuration of ... ...

    Abstract Within urbanized areas, the importance of greenspaces for wildlife has been widely investigated for some animal groups, but reptiles have generally been neglected. To assess the importance of the amount, spatial distribution, and configuration of greenspaces (comprised of terrestrial and aquatic areas), we examined semi-aquatic turtle species richness in urbanized areas. In this study, we sampled turtles from 2010 to 2011 at 20 ponds, including farm (rural) ponds, ponds in urbanized environments, and golf course ponds. We used a hierarchical Bayesian species-richness model to estimate species richness and species-specific occupancy responses to three pond types (rural, golf, or urban) and four landscape measurements of greenspace (i.e., Euclidean nearest neighbor, interspersion juxtaposition, percent of landscape, and connectance), generated in FRAGSTATS. We found that probability of occupancy of four species, Kinosternon subrubrum, Trachemys scripta, Chelydra serpentina, and Pseudemys concinna increased substantially with an increase in connectance of greenspace within 500m of each pond. When the model examining the configuration of greenspaces was analyzed, estimated species richness was greater at golf ponds as compared to either rural or urban ponds, and richness increased with increasing connectivity of greenspaces. Our results indicate that in golf course ponds can potentially support a greater diversity of semi-aquatic turtle species than rural or urban ponds and thus may be considered superior habitat in suburban environments. In addition, we suggest that maintaining connectivity of greenspaces in suburban areas is important for semi-aquatic turtles and should be considered in urban planning.
    Schlagwörter Chelydra serpentina ; farms ; golf courses ; habitats ; landscapes ; models ; ponds ; probability ; Pseudemys ; species diversity ; suburban areas ; Trachemys scripta ; turtles ; urban areas ; urban planning ; urbanization ; wildlife
    Sprache Englisch
    Erscheinungsverlauf 2013-09
    Umfang p. 46-56.
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    ZDB-ID 742504-1
    ISSN 1872-6062 ; 0169-2046
    ISSN (online) 1872-6062
    ISSN 0169-2046
    DOI 10.1016/j.landurbplan.2013.04.011
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  5. Artikel ; Online: Upland Habitat Quality and Historic Landscape Composition Influence Genetic Variation of a Pond-Breeding Salamander

    Jeremiah R. Alexander / Chelsea S. Kross / Steven J. Price / Stephen C. Richter / Michael E. Dorcas

    Diversity, Vol 5, Iss 4, Pp 724-

    2013  Band 733

    Abstract: Understanding the temporal and spatial scale at which habitat alteration impacts populations is important for conservation and management. Amphibians have declined more than other vertebrates, and pond-breeding species are particularly susceptible to ... ...

    Abstract Understanding the temporal and spatial scale at which habitat alteration impacts populations is important for conservation and management. Amphibians have declined more than other vertebrates, and pond-breeding species are particularly susceptible to habitat loss and fragmentation because they have terrestrial and aquatic life stages. One approach to management of pond-breeding species is protection of core upland habitat surrounding the breeding pond. We used genetic variation as an indicator of population status in a common amphibian species, spotted salamanders (Ambystoma maculatum), to determine how amount of suitable upland habitat relates to population status in the greater Charlotte, North Carolina, USA metropolitan area. We developed candidate models to evaluate the relative influence of historical and contemporary forested habitat availability on population genetic variation at two spatial scales of upland area (164 m and 2000 m) at four time intervals over the past seven decades (1938, 1978, 1993, 2005). We found that historical land cover best predicted contemporary allelic richness. Inbreeding coefficient and observed heterozygosity were not effectively predicted by forest cover at either spatial or temporal scales. Allelic richness was best predicted at the smaller spatial scale in the 1993 time interval. Predicting and understanding how future landscape configuration affects genetic variation of common and rare species is imperative for the conservation of amphibian and other wildlife populations.
    Schlagwörter population genetics ; Ambystoma maculatum ; upland core habitat ; historic landscapes ; microsatellite DNA ; Biology (General) ; QH301-705.5
    Sprache Englisch
    Erscheinungsdatum 2013-09-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  6. Artikel: Responses of riparian reptile communities to damming and urbanization

    Hunt, Stephanie D / Jacquelyn C. Guzy / Steven J. Price / Brian J. Halstead / Evan A. Eskew / Michael E. Dorcas

    Elsevier Ltd Biological conservation. 2013 Jan., v. 157

    2013  

    Abstract: Various anthropogenic pressures, including habitat loss, threaten reptile populations worldwide. Riparian zones are critical habitat for many reptile species, but these habitats are also frequently modified by anthropogenic activities. Our study ... ...

    Abstract Various anthropogenic pressures, including habitat loss, threaten reptile populations worldwide. Riparian zones are critical habitat for many reptile species, but these habitats are also frequently modified by anthropogenic activities. Our study investigated the effects of two riparian habitat modifications – damming and urbanization – on overall and species-specific reptile occupancy patterns. We used time-constrained search techniques to compile encounter histories for 28 reptile species at 21 different sites along the Broad and Pacolet Rivers of South Carolina. Using a hierarchical Bayesian analysis, we modeled reptile occupancy responses to a site’s distance upstream from dam, distance downstream from dam, and percent urban land use. The mean occupancy response by the reptile community indicated that reptile occupancy and species richness were maximized when sites were farther upstream from dams. Species-specific occupancy estimates showed a similar trend of lower occupancy immediately upstream from dams. Although the mean occupancy response of the reptile community was positively related to distance downstream from dams, the occupancy response to distance downstream varied among species. Percent urban land use had little effect on the occupancy response of the reptile community or individual species. Our results indicate that the conditions of impoundments and subsequent degradation of the riparian zones upstream from dams may not provide suitable habitat for a number of reptile species.
    Schlagwörter Bayesian theory ; anthropogenic activities ; habitat destruction ; land use ; reptiles ; riparian areas ; species diversity ; urbanization ; South Carolina
    Sprache Englisch
    Erscheinungsverlauf 2013-01
    Umfang p. 277-284.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ISSN 0006-3207
    DOI 10.1016/j.biocon.2012.08.035
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  7. Artikel: The conservation status of the world’s reptiles

    Böhm, Monika / Ben Collen / Jonathan E.M. Baillie / Philip Bowles / Janice Chanson / Neil Cox / Geoffrey Hammerson / Michael Hoffmann / Suzanne R. Livingstone / Mala Ram / Anders G.J. Rhodin / Simon N. Stuart / Peter Paul van Dijk / Bruce E. Young / Leticia E. Afuang / Aram Aghasyan / Andrés García / César Aguilar / Rastko Ajtic /
    Ferdi Akarsu / Laura R.V. Alencar / Allen Allison / Natalia Ananjeva / Steve Anderson / Claes Andrén / Daniel Ariano-Sánchez / Juan Camilo Arredondo / Mark Auliya / Christopher C. Austin / Aziz Avci / Patrick J. Baker / André F. Barreto-Lima / César L. Barrio-Amorós / Dhruvayothi Basu / Michael F. Bates / Alexandre Batistella / Aaron Bauer / Daniel Bennett / Wolfgang Böhme / Don Broadley / Rafe Brown / Joseph Burgess / Ashok Captain / Santiago Carreira / Maria del Rosario Castañeda / Fernando Castro / Alessandro Catenazzi / José R. Cedeño-Vázquez / David G. Chapple / Marc Cheylan / Diego F. Cisneros-Heredia / Dan Cogalniceanu / Hal Cogger / Claudia Corti / Gabriel C. Costa / Patrick J. Couper / Tony Courtney / Jelka Crnobrnja-Isailovic / Pierre-André Crochet / Brian Crother / Felix Cruz / Jennifer C. Daltry / R.J. Ranjit Daniels / Indraneil Das / Anslem de Silva / Arvin C. Diesmos / Lutz Dirksen / Tiffany M. Doan / C. Kenneth Dodd / J. Sean Doody / Michael E. Dorcas / Jose Duarte de Barros Filho / Vincent T. Egan / El Hassan El Mouden / Dirk Embert / Robert E. Espinoza / Alejandro Fallabrino / Xie Feng / Zhao-Jun Feng / Lee Fitzgerald / Oscar Flores-Villela / Frederico G.R. França / Darrell Frost / Hector Gadsden / Tony Gamble / S.R. Ganesh / Miguel A. Garcia / Juan E. García-Pérez / Joey Gatus / Maren Gaulke / Philippe Geniez / Arthur Georges / Justin Gerlach / Stephen Goldberg / Juan-Carlos T. Gonzalez / David J. Gower / Tandora Grant / Eli Greenbaum / Cristina Grieco / Peng Guo / Alison M. Hamilton / Kelly Hare / S. Blair Hedges / Neil Heideman / Craig Hilton-Taylor / Rod Hitchmough / Bradford Hollingsworth / Mark Hutchinson / Ivan Ineich / John Iverson / Fabian M. Jaksic / Richard Jenkins / Ulrich Joger / Reizl Jose / Yakup Kaska / Uğur Kaya / J. Scott Keogh / Gunther Köhler / Gerald Kuchling / Yusuf Kumlutaş / Axel Kwet / Enrique La Marca / William Lamar / Amanda Lane / Bjorn Lardner / Craig Latta / Gabrielle Latta / Michael Lau / Pablo Lavin / Dwight Lawson / Matthew LeBreton / Edgar Lehr / Duncan Limpus / Nicola Lipczynski / Aaron S. Lobo / Marco A. López-Luna / Luca Luiselli / Vimoksalehi Lukoschek / Mikael Lundberg / Petros Lymberakis / Robert Macey / William E. Magnusson / D. Luke Mahler / Anita Malhotra / Jean Mariaux / Bryan Maritz / Otavio A.V. Marques / Rafael Márquez / Marcio Martins / Gavin Masterson / José A. Mateo / Rosamma Mathew / Nixon Mathews / Gregory Mayer / James R. McCranie / G. John Measey / Fernando Mendoza-Quijano / Michele Menegon / Sébastien Métrailler / David A. Milton / Chad Montgomery / Sérgio A.A. Morato / Tami Mott / Antonio Muñoz-Alonso / John Murphy / Truong Q. Nguyen / Göran Nilson / Cristiano Nogueira / Herman Núñez / Nikolai Orlov / Hidetoshi Ota / José Ottenwalder / Theodore Papenfuss / Stesha Pasachnik / Paulo Passos / Olivier S.G. Pauwels / Néstor Pérez-Buitrago / Valentín Pérez-Mellado / Eric R. Pianka / Juan Pleguezuelos / Caroline Pollock / Paulino Ponce-Campos / Robert Powell / Fabio Pupin / Gustavo E. Quintero Díaz / Raju Radder / Jan Ramer / Arne R. Rasmussen / Chris Raxworthy / Robert Reynolds / Nadia Richman / Edmund L. Rico / Elisa Riservato / Gilson Rivas / Pedro L.B. da Rocha / Mark-Oliver Rödel / Lourdes Rodríguez Schettino / Willem M. Roosenburg / James P. Ross / Riyad Sadek / Kate Sanders / Georgina Santos-Barrera / Hermann H. Schleich / Benedikt R. Schmidt / Andreas Schmitz / Mozafar Sharifi / Glenn Shea / Hai-Tao Shi / Richard Shine / Roberto Sindaco / Tahar Slimani / Ruchira Somaweera / Steve Spawls / Peter Stafford / Rob Stuebing / Sam Sweet / Emerson Sy / Helen J. Temple / Marcelo F. Tognelli / Krystal Tolley / Peter J. Tolson / Boris Tuniyev / Sako Tuniyev / Nazan Üzüm / Gerard van Buurt / Monique Van Sluys / Alvaro Velasco / Miguel Vences / Milan Veselý / Sabine Vinke / Thomas Vinke / Gernot Vogel / Milan Vogrin / Richard C. Vogt / Oliver R. Wearn / Yehudah L. Werner / Martin J. Whiting / Thomas Wiewandt / John Wilkinson / Byron Wilson / Sally Wren / Tara Zamin / Kaiya Zhou / George Zug

    Biological conservation. 2013 Jan., v. 157

    2013  

    Abstract: Effective and targeted conservation action requires detailed information about species, their distribution, systematics and ecology as well as the distribution of threat processes which affect them. Knowledge of reptilian diversity remains surprisingly ... ...

    Abstract Effective and targeted conservation action requires detailed information about species, their distribution, systematics and ecology as well as the distribution of threat processes which affect them. Knowledge of reptilian diversity remains surprisingly disparate, and innovative means of gaining rapid insight into the status of reptiles are needed in order to highlight urgent conservation cases and inform environmental policy with appropriate biodiversity information in a timely manner. We present the first ever global analysis of extinction risk in reptiles, based on a random representative sample of 1500 species (16% of all currently known species). To our knowledge, our results provide the first analysis of the global conservation status and distribution patterns of reptiles and the threats affecting them, highlighting conservation priorities and knowledge gaps which need to be addressed urgently to ensure the continued survival of the world’s reptiles. Nearly one in five reptilian species are threatened with extinction, with another one in five species classed as Data Deficient. The proportion of threatened reptile species is highest in freshwater environments, tropical regions and on oceanic islands, while data deficiency was highest in tropical areas, such as Central Africa and Southeast Asia, and among fossorial reptiles. Our results emphasise the need for research attention to be focussed on tropical areas which are experiencing the most dramatic rates of habitat loss, on fossorial reptiles for which there is a chronic lack of data, and on certain taxa such as snakes for which extinction risk may currently be underestimated due to lack of population information. Conservation actions specifically need to mitigate the effects of human-induced habitat loss and harvesting, which are the predominant threats to reptiles.
    Schlagwörter biodiversity ; environmental policy ; extinction ; habitat destruction ; islands ; risk ; risk analysis ; sampling ; snakes ; threatened species ; tropics ; Central Africa ; South East Asia
    Sprache Englisch
    Erscheinungsverlauf 2013-01
    Umfang p. 372-385.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ISSN 0006-3207
    DOI 10.1016/j.biocon.2012.07.015
    Datenquelle NAL Katalog (AGRICOLA)

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