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Marcelli M, Striglioni F, Fusillo R. Range reexpansion after long stasis: Italian otters ( Lutra lutra) at their northern edge. Ecol Evol 2023; 13:e9726. [PMID: 36620409 PMCID: PMC9812837 DOI: 10.1002/ece3.9726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 11/12/2022] [Accepted: 12/20/2022] [Indexed: 01/06/2023] Open
Abstract
Species range shifts and expansion are subjects of primary research interest in the context of climate warming and biological invasions. Few studies have focused on reexpansion of species that suffered severe declines. Here, we focused on population recovery of Eurasian otters (Lutra lutra) in Italy, first detected in 2003 after a southward range contraction. We modeled the rate of range expansion and occupancy at the northern expanding front (central Italy), to gain insights into the progress of recovery and mechanisms of reexpansion. We performed a field survey in 2021, which redefined the northern limit of distribution further north, in close proximity to the Gran Sasso National Park. Then we analyzed a time series (1985-2021) of distances of northernmost occurrences from the center of the 1985 range. Using segmented regression, we were able to identify a prolonged stasis of the northern range edge and a simultaneous increase in occupancy from 0.151 to 0.4. A breakpoint was estimated in 2006, after which the range expanded northwards at an average rate of 5.48 km/year. From 2006 to 2021, the overall northward shift was about 80 km. Occupancy continued to increase until 2019 and abruptly declined in 2021. These patterns suggest that the reexpansion of the range can be limited by low occupancy at the expanding front. As occupancy increases, long-distance dispersal increases and then range expands. The low occupancy at the current distribution limit of otters may reflect a higher anthropogenic pressure on northern habitats, which could slow down the reexpansion process.
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Ahizi MN, Kouman CY, Ouattara A, Kouamé NP, Dede A, Fairet E, Shirley MH. Detectability and impact of repetitive surveys on threatened West African crocodylians. Ecol Evol 2021; 11:15062-15076. [PMID: 34765160 PMCID: PMC8571622 DOI: 10.1002/ece3.8188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 09/05/2021] [Accepted: 09/09/2021] [Indexed: 11/28/2022] Open
Abstract
West African crocodylians are among the most threatened and least studied crocodylian species globally. Assessing population status and establishing a basis for population monitoring is the highest priority action for this region. Monitoring of crocodiles is influenced by many factors that affect detectability, including environmental variables and individual- or population-level wariness. We investigated how these factors affect detectability and counts of the critically endangered Mecistops cataphractus and the newly recognized Crocodylus suchus. We implemented 195 repetitive surveys at 38 sites across Côte d'Ivoire between 2014 and 2019. We used an occupancy-based approach and a count-based GLMM analysis to determine the effect of environmental and anthropogenic variables on detection and modeled crocodile wariness over repetitive surveys. Despite their rarity and level of threat, detection probability of both species was relatively high (0.75 for M. cataphractus and 0.81 for C. suchus), but a minimum of two surveys were required to infer absence of either species with 90% confidence. We found that detection of M. cataphractus was significantly negatively influenced by fishing net encounter rate, while high temperature for the previous 48 h of the day of the survey increased C. suchus detection. Precipitation and aquatic vegetation had significant negative and positive influence, respectively, on M. cataphractus counts and showed the opposite effect for C. suchus counts. We also found that fishing encounter rate had a significant negative effect on C. suchus counts. Interestingly, survey repetition did not generally affect wariness for either species, though there was some indication that at least M. cataphractus was more wary by the fourth replicate. These results are informative for designing future survey and monitoring protocols for these threatened crocodylians in West Africa and for other endangered crocodylians globally.
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Affiliation(s)
- Michel N. Ahizi
- Université Nangui‐AbrogouaAbidjanCôte d'Ivoire
- Project MecistopsSarasotaFloridaUSA
| | - Christine Y. Kouman
- Université Nangui‐AbrogouaAbidjanCôte d'Ivoire
- Project MecistopsSarasotaFloridaUSA
| | | | | | - Azani Dede
- Office Ivoirien des Parcs et RéservesAbidjanCôte d'Ivoire
| | - Emilie Fairet
- Project MecistopsSarasotaFloridaUSA
- Wildlife Conservation SocietyNew YorkNew YorkUSA
| | - Matthew H. Shirley
- Project MecistopsSarasotaFloridaUSA
- Institute of EnvironmentFlorida International UniversityNorth MiamiFloridaUSA
- Rare Species Conservatory FoundationLoxahatcheeFloridaUSA
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Jordaan A, Heideman NJL, Buschke FT. Topography‐derived variables provide insight into habitat occupancy of a cryptic snake,
Bitis atropos. AUSTRAL ECOL 2021. [DOI: 10.1111/aec.13057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Adriaan Jordaan
- Department of Zoology & Entomology University of the Free State P.O. Box 339 Bloemfontein 9300South Africa
| | - Neil J. L. Heideman
- Department of Zoology & Entomology University of the Free State P.O. Box 339 Bloemfontein 9300South Africa
| | - Falko T. Buschke
- Centre for Environmental Management University of the Free State Bloemfontein South Africa
- Animal Ecology, Global Change and Sustainable Development KU Leuven Leuven Belgium
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Suárez‐Tangil BD, Rodríguez A. Uniform performance of mammal detection methods under contrasting environmental conditions in Mediterranean landscapes. Ecosphere 2021. [DOI: 10.1002/ecs2.3349] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Bruno D. Suárez‐Tangil
- Department of Conservation Biology Estación Biológica de Doñana – CSIC Américo Vespucio 26 Sevilla41092Spain
| | - Alejandro Rodríguez
- Department of Conservation Biology Estación Biológica de Doñana – CSIC Américo Vespucio 26 Sevilla41092Spain
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5
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Paton AJ, Buettel JC, Brook BW. Evaluating scat surveys as a tool for population and community assessments. WILDLIFE RESEARCH 2021. [DOI: 10.1071/wr21056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Yarra AN, Magoulick DD. Effect of Stream Permanence on Predation Risk of Lotic Crayfish by Riparian Predators. SOUTHEAST NAT 2020. [DOI: 10.1656/058.019.0407] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Allyson N. Yarra
- Arkansas Cooperative Fish and Wildlife Research Unit, Department of Biological Sciences, University of Arkansas, Fayetteville, AR 72701
| | - Daniel D. Magoulick
- US Geological Survey, Arkansas Cooperative Fish and Wildlife Research Unit, Department of Biological Sciences, University Arkansas, Fayetteville, AR 72701
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Holland AM, Schauber EM, Nielsen CK, Hellgren EC. River otter and mink occupancy dynamics in riparian systems. J Wildl Manage 2019. [DOI: 10.1002/jwmg.21745] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Angela M. Holland
- Cooperative Wildlife Research Laboratory, Mail Code 6504, Southern Illinois University Carbondale IL 62901 USA
| | - Eric M. Schauber
- Cooperative Wildlife Research Laboratory, Mail Code 6504, Southern Illinois University Carbondale IL 62901 USA
| | - Clayton K. Nielsen
- Cooperative Wildlife Research Laboratory, Mail Code 6504, Southern Illinois University Carbondale IL 62901 USA
| | - Eric C. Hellgren
- Department of Wildlife Ecology and Conservation 110 Newins‐Ziegler Hall, PO Box 110430 Gainesville FL 32611 USA
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Rivera NA, Totoni S, Monick K, Tian T, Green ML, Novakofski J, Mateus‐Pinilla NE. A comparison of three methods to evaluate otter latrine activity. WILDLIFE SOC B 2019. [DOI: 10.1002/wsb.947] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nelda A. Rivera
- Illinois Natural History Survey, Prairie Research InstituteUniversity of Illinois Urbana‐Champaign1816S Oak StreetChampaignIL61820USA
| | - Samantha Totoni
- Illinois Natural History Survey, Prairie Research InstituteUniversity of Illinois Urbana‐Champaign1816S Oak StreetChampaignIL61820USA
| | - Kathryn Monick
- Illinois Natural History Survey, Prairie Research InstituteUniversity of Illinois Urbana‐Champaign1816S Oak StreetChampaignIL61820USA
| | - Ting Tian
- Illinois Natural History Survey, Prairie Research InstituteUniversity of Illinois Urbana‐Champaign1816S Oak StreetChampaignIL61820USA
| | - Michelle L. Green
- Illinois Natural History Survey, Prairie Research InstituteUniversity of Illinois Urbana‐Champaign1816S Oak StreetChampaignIL61820USA
| | - Jan Novakofski
- Department of Animal SciencesUniversity of Illinois Urbana‐Champaign205 Meat Science Lab 1503S, Maryland Drive M/C 010 UrbanaIL61801USA
| | - Nohra E. Mateus‐Pinilla
- Illinois Natural History Survey, Prairie Research InstituteUniversity of Illinois Urbana‐Champaign1816S Oak StreetChampaignIL61820USA
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Holland AM, Schauber EM, Nielsen CK, Hellgren EC. Stream community richness predicts apex predator occupancy dynamics in riparian systems. OIKOS 2018. [DOI: 10.1111/oik.05085] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Angela M. Holland
- Cooperative Wildlife Research Laboratory; Southern Illinois Univ.; Carbondale IL USA
- Joseph W. Jones Ecological Research Center; 3988 Jones Center Drive; Newton GA 39870 USA
| | - Eric M. Schauber
- Cooperative Wildlife Research Laboratory; Southern Illinois Univ.; Carbondale IL USA
| | - Clayton K. Nielsen
- Cooperative Wildlife Research Laboratory; Southern Illinois Univ.; Carbondale IL USA
| | - Eric C. Hellgren
- Dept of Wildlife Ecology and Conservation; Univ. of Florida; Gainesville FL USA
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Jo YS, Won CM, Fritts SR, Wallace MC, Baccus JT. Distribution and habitat models of the Eurasian otter, Lutra lutra, in South Korea. J Mammal 2017. [DOI: 10.1093/jmammal/gyx037] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Keiter DA, Cunningham FL, Rhodes OE, Irwin BJ, Beasley JC. Optimization of Scat Detection Methods for a Social Ungulate, the Wild Pig, and Experimental Evaluation of Factors Affecting Detection of Scat. PLoS One 2016; 11:e0155615. [PMID: 27224453 PMCID: PMC4880348 DOI: 10.1371/journal.pone.0155615] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 05/02/2016] [Indexed: 11/29/2022] Open
Abstract
Collection of scat samples is common in wildlife research, particularly for genetic capture-mark-recapture applications. Due to high degradation rates of genetic material in scat, large numbers of samples must be collected to generate robust estimates. Optimization of sampling approaches to account for taxa-specific patterns of scat deposition is, therefore, necessary to ensure sufficient sample collection. While scat collection methods have been widely studied in carnivores, research to maximize scat collection and noninvasive sampling efficiency for social ungulates is lacking. Further, environmental factors or scat morphology may influence detection of scat by observers. We contrasted performance of novel radial search protocols with existing adaptive cluster sampling protocols to quantify differences in observed amounts of wild pig (Sus scrofa) scat. We also evaluated the effects of environmental (percentage of vegetative ground cover and occurrence of rain immediately prior to sampling) and scat characteristics (fecal pellet size and number) on the detectability of scat by observers. We found that 15- and 20-m radial search protocols resulted in greater numbers of scats encountered than the previously used adaptive cluster sampling approach across habitat types, and that fecal pellet size, number of fecal pellets, percent vegetative ground cover, and recent rain events were significant predictors of scat detection. Our results suggest that use of a fixed-width radial search protocol may increase the number of scats detected for wild pigs, or other social ungulates, allowing more robust estimation of population metrics using noninvasive genetic sampling methods. Further, as fecal pellet size affected scat detection, juvenile or smaller-sized animals may be less detectable than adult or large animals, which could introduce bias into abundance estimates. Knowledge of relationships between environmental variables and scat detection may allow researchers to optimize sampling protocols to maximize utility of noninvasive sampling for wild pigs and other social ungulates.
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Affiliation(s)
- David A. Keiter
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, United States of America
- D. B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, United States of America
- * E-mail:
| | - Fred L. Cunningham
- National Wildlife Research Center, United States Department of Agriculture Animal and Plant Health Inspection Service, Starkville, Mississippi, United States of America
| | - Olin E. Rhodes
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, United States of America
- Odum School of Ecology, University of Georgia, Athens, Georgia, United States of America
| | - Brian J. Irwin
- U. S. Geological Survey, Georgia Cooperative Fish and Wildlife Research Unit, D. B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, United States of America
| | - James C. Beasley
- Savannah River Ecology Laboratory, University of Georgia, Aiken, South Carolina, United States of America
- D. B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, United States of America
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Chambert T, Miller DAW, Nichols JD. Modeling false positive detections in species occurrence data under different study designs. Ecology 2015; 96:332-9. [DOI: 10.1890/14-1507.1] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Roche EA, Shaffer TL, Anteau MJ, Sherfy MH, Stucker JH, Wiltermuth MT, Dovichin CM. Detection probability of least tern and piping plover chicks in a large river system. J Wildl Manage 2014. [DOI: 10.1002/jwmg.697] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Erin A. Roche
- U.S. Geological Survey; Northern Prairie Wildlife Research Center; 8711 37th Street Southeast Jamestown ND 58401 USA
| | - Terry L. Shaffer
- U.S. Geological Survey; Northern Prairie Wildlife Research Center; 8711 37th Street Southeast Jamestown ND 58401 USA
| | - Michael J. Anteau
- U.S. Geological Survey; Northern Prairie Wildlife Research Center; 8711 37th Street Southeast Jamestown ND 58401 USA
| | - Mark H. Sherfy
- U.S. Geological Survey; Northern Prairie Wildlife Research Center; 8711 37th Street Southeast Jamestown ND 58401 USA
| | - Jennifer H. Stucker
- U.S. Geological Survey; Northern Prairie Wildlife Research Center; 1561 Lindig Street St. Paul MN 55108 USA
| | - Mark T. Wiltermuth
- U.S. Geological Survey; Northern Prairie Wildlife Research Center; 8711 37th Street Southeast Jamestown ND 58401 USA
| | - Colin M. Dovichin
- U.S. Geological Survey; Northern Prairie Wildlife Research Center; 8711 37th Street Southeast Jamestown ND 58401 USA
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14
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Brzeski KE, Gunther MS, Black JM. Evaluating river otter demography using noninvasive genetic methods. J Wildl Manage 2013. [DOI: 10.1002/jwmg.610] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | | | - Jeffrey M. Black
- Department of Wildlife; Humboldt State University; Arcata CA 95521 USA
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15
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Detecting detectability: identifying and correcting bias in binary wildlife surveys demonstrates their potential impact on conservation assessments. EUR J WILDLIFE RES 2013. [DOI: 10.1007/s10344-013-0741-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Parry G, Bodger O, McDonald R, Forman D. A systematic re-sampling approach to assess the probability of detecting otters Lutra lutra using spraint surveys on small lowland rivers. ECOL INFORM 2013. [DOI: 10.1016/j.ecoinf.2012.11.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Just EH, Stevens SS, Spinola RM, Serfass TL. Detecting river otterLontra canadensislatrines near bridges: does habitat and season influence survey success? WILDLIFE BIOLOGY 2012. [DOI: 10.2981/11-042] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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18
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Mckann PC, Gray BR, Thogmartin WE. Small sample bias in dynamic occupancy models. J Wildl Manage 2012. [DOI: 10.1002/jwmg.433] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Marcelli M, Poledník L, Poledníková K, Fusillo R. Land use drivers of species re-expansion: inferring colonization dynamics in Eurasian otters. DIVERS DISTRIB 2012. [DOI: 10.1111/j.1472-4642.2012.00898.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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20
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Williamson R, Clark JD. Evaluating interactions between river otters and muskrats at bridge crossings in Kentucky. J Mammal 2011. [DOI: 10.1644/11-mamm-a-088.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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21
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Schooley RL, Cotner LA, Ahlers AA, Heske EJ, Levengood JM. Monitoring site occupancy for American mink in its native range. J Wildl Manage 2011. [DOI: 10.1002/jwmg.294] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ramírez-Barajas PJ, Islebe GA, Calmé S. Impact of Hurricane Dean (2007) on Game Species of the Selva Maya, Mexico. Biotropica 2011. [DOI: 10.1111/j.1744-7429.2011.00819.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pablo J. Ramírez-Barajas
- El Colegio de la Frontera Sur; Avenida Centenario Km 5.5; C.P. 77014; Chetumal; Quintana Roo; Mexico
| | - Gerald A. Islebe
- El Colegio de la Frontera Sur; Avenida Centenario Km 5.5; C.P. 77014; Chetumal; Quintana Roo; Mexico
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Mowry RA, Gompper ME, Beringer J, Eggert LS. River otter population size estimation using noninvasive latrine surveys. J Wildl Manage 2011. [DOI: 10.1002/jwmg.193] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Jeffress MR, Paukert CP, Whittier JB, Sandercock BK, Gipson PS. Scale-dependent Factors Affecting North American River Otter Distribution in the Midwest. AMERICAN MIDLAND NATURALIST 2011. [DOI: 10.1674/0003-0031-166.1.177] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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