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Thacker AJ, Hileman ET, Keenlance P, McCluskey EM, Swinehart A, Kovach J, Moore JA. Modeling Occupancy and Detection Probabilities to Update the Status of Threatened Eastern Massasauga Rattlesnake Populations. Glob Ecol Conserv 2023. [DOI: 10.1016/j.gecco.2023.e02422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023] Open
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2
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Struett MM, Roper JJ, Moura MO. Population size and survival of the Brazilian Torrent Frog
Hylodes heyeri
(Anura, Hylodidae). AUSTRAL ECOL 2022. [DOI: 10.1111/aec.13254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
| | - James Joseph Roper
- Programa de Pós‐Graduação em Ecologia e Conservação Universidade Federal do Paraná Curitiba Brazil
| | - Maurício Osvaldo Moura
- Programa de Pós‐Graduação em Ecologia e Conservação Universidade Federal do Paraná Curitiba Brazil
- Departamento de Zoologia Universidade Federal do Paraná Curitiba Brazil
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3
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Reporting of Freshwater Cyanobacterial Poisoning in Terrestrial Wildlife: A Systematic Map. Animals (Basel) 2022; 12:ani12182423. [PMID: 36139281 PMCID: PMC9494982 DOI: 10.3390/ani12182423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 08/26/2022] [Accepted: 09/12/2022] [Indexed: 12/24/2022] Open
Abstract
Simple Summary Harmful cyanobacterial blooms (cyanoHABs) have been reported globally, threatening human and animal health. They are encouraged by the warming climate and agricultural pollution creating nutrient-rich, warm environments, ideal for cyanobacterial proliferation. The cyanotoxins produced by these blooms have caused poisonings in many wildlife species; however, these cases are severely underreported, and many are likely missed. The aim of this systematic map was to collate, organise, and characterise all existing reports of cyanotoxin poisonings in terrestrial wildlife. We conducted a search of the published literature using online databases, yielding a total of 45 cases detailing incidents involving terrestrial wildlife. There is no current standard method for the reporting and diagnosis of cyanotoxin intoxication cases, and we provide recommendations on this to include both clinical diagnostic tools and investigative chemistry techniques. Less than half of all cases employed robust methods of detection and diagnosis based on our recommendations. Most cases were investigated after poisonings had already occurred, and only nine reports mentioned any effort to mitigate the effects of harmful cyanobacteria on terrestrial wildlife. This systematic map details terrestrial wildlife cyanotoxin intoxications from a diagnostic perspective, identifying how reporting can be improved, leading to more successful mitigation and investigative efforts in the future. Abstract Global warming and over-enrichment of freshwater systems have led to an increase in harmful cyanobacterial blooms (cyanoHABs), affecting human and animal health. The aim of this systematic map was to detail the current literature surrounding cyanotoxin poisonings in terrestrial wildlife and identify possible improvements to reports of morbidity and mortality from cyanotoxins. A systematic search was conducted using the electronic databases Scopus and Web of Science, yielding 5059 published studies identifying 45 separate case reports of wildlife poisonings from North America, Africa, Europe, and Asia. Currently, no gold standard for the diagnosis of cyanotoxin intoxication exists for wildlife, and we present suggested guidelines here. These involved immunoassays and analytical chemistry techniques to identify the toxin involved, PCR to identify the cyanobacterial species involved, and evidence of ingestion or exposure to cyanotoxins in the animals affected. Of the 45 cases, our recommended methods concurred with 48.9% of cases. Most often, cases were investigated after a mortality event had already occurred, and where mitigation was implemented, only three cases were successful in their efforts. Notably, only one case of invasive cyanobacteria was recorded in this review despite invasive species being known to occur throughout the globe; this could explain the underreporting of invasive cyanobacteria. This systematic map highlights the perceived absence of robust detection, surveillance, and diagnosis of cyanotoxin poisoning in wildlife. It may be true that wildlife is less susceptible to these poisoning events; however, the true rates of poisoning are likely much more than is reported in the literature.
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Santos MTT, Barata IM, Ferreira RB, Haddad CFB, Gridi-Papp M, de Carvalho TR. Complex acoustic signals in Crossodactylodes (Leptodactylidae, Paratelmatobiinae): a frog genus historically regarded as voiceless. BIOACOUSTICS 2021. [DOI: 10.1080/09524622.2021.1904443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Marcus Thadeu T. Santos
- Laboratório de Herpetologia, Departamento de Zoologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | | | | | - Célio F. B. Haddad
- Laboratório de Herpetologia, Departamento de Biodiversidade e Centro de Aquicultura (CAUNESP), Universidade Estadual Paulista, Rio Claro, Brazil
| | - Marcos Gridi-Papp
- Department of Biological Sciences, University of the Pacific, Stockton, CA, USA
| | - Thiago R. de Carvalho
- Laboratório de Herpetologia, Departamento de Biodiversidade e Centro de Aquicultura (CAUNESP), Universidade Estadual Paulista, Rio Claro, Brazil
- Department of Biological Sciences, University of the Pacific, Stockton, CA, USA
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5
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Rais M, Ahmed J, Naveed A, Batool A, Shahzad A, Bibi R, Sajjad A. Field surveys along habitat gradients revealed differences in herpetofauna assemblage in Margalla Hills National Park, Islamabad, Pakistan. Biodivers Data J 2021; 9:e61541. [PMID: 33841019 PMCID: PMC8026535 DOI: 10.3897/bdj.9.e61541] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 03/19/2021] [Indexed: 11/20/2022] Open
Abstract
This study was conducted to see whether herpetofaunal assemblage differed amongst hiking trails, undisturbed forest and urban areas within the Margalla Hills National Park, Islamabad Capital Territory, Pakistan. Circular plot area-constrained searches (45 plots in each habitat, each plot with an area of 25 m2) were used from March 2018 to July 2019. We recorded seven amphibian species, nine lizard species and six snake species. The species richness of amphibians and lizards was the same in the studied strata, while the detection and encounter rate of snakes was lower in the undisturbed forest and urban areas. The encounter rate of amphibians differed significantly between urban areas and hiking trails/undisturbed forest. The encounter rate and population density of lizards differed significantly between undisturbed forest and urban areas. The most frequently encountered amphibian species along the hiking trail and urban areas was Duttaphrynusstomaticus, with Hoplobatrachustigerinus in undisturbed forest. The most common and frequently encountered lizard species along the hiking trail and urban areas was Hemidactylusbrookii, while the Ophisopsjerdonii was the most frequently seen in undisturbed forest. The most common and frequently encountered snake species along the hiking trail and undisturbed forest was the Indotyphlopsbraminus, while Ptyasmucosa was the most common in urban areas. The subsequent bio-assessment, based on herpetofauna, of the Park revealed good to excellent biotic integrity The Park faces threats including livestock grazing, alien invasive vegetation and human disturbance due to settlements, restaurants and tourism-related activities. While several of these threats have been mitigated since the establishment of the Islamabad Wildlife Management Board, the Park still requires improved management, especially regarding regulating tourism.
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Affiliation(s)
- Muhammad Rais
- Herpetology Lab, Department of Wildlife Management, Arid Agriculture University, Rawalpindi, Pakistan Herpetology Lab, Department of Wildlife Management, Arid Agriculture University Rawalpindi Pakistan
| | - Jamal Ahmed
- Herpetology Lab, Department of Wildlife Management, Arid Agriculture University, Rawalpindi, Pakistan Herpetology Lab, Department of Wildlife Management, Arid Agriculture University Rawalpindi Pakistan
| | - Aiman Naveed
- Department of Zoology, Arid Agriculture University, Rawalpindi, Pakistan Department of Zoology, Arid Agriculture University Rawalpindi Pakistan
| | - Arooj Batool
- Herpetology Lab, Department of Wildlife Management, Arid Agriculture University, Rawalpindi, Pakistan Herpetology Lab, Department of Wildlife Management, Arid Agriculture University Rawalpindi Pakistan
| | - Aqsa Shahzad
- Herpetology Lab, Department of Wildlife Management, Arid Agriculture University, Rawalpindi, Pakistan Herpetology Lab, Department of Wildlife Management, Arid Agriculture University Rawalpindi Pakistan
| | - Razia Bibi
- Department of Biosciences, University of Wah, Rawalpindi, Pakistan Department of Biosciences, University of Wah Rawalpindi Pakistan
| | - Anum Sajjad
- Department of Environmental Sciences, International Islamic University, Islamabad, Pakistan Department of Environmental Sciences, International Islamic University Islamabad Pakistan
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6
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Oropeza‐Sánchez MT, Suazo‐Ortuño I, Benítez‐Malvido J, Munguía‐Steyer R. Occupancy models including local and landscape variables are useful to assess the distribution of a salamander species at risk. POPUL ECOL 2021. [DOI: 10.1002/1438-390x.12078] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Marco Tulio Oropeza‐Sánchez
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad (IIES) Universidad Nacional Autónoma de México Morelia Michoacán Mexico
| | - Ireri Suazo‐Ortuño
- Instituto de Investigaciones sobre los Recursos Naturales (INIRENA) Universidad Michoacana de San Nicolás de Hidalgo Morelia Michoacán Mexico
| | - Julieta Benítez‐Malvido
- Instituto de Investigaciones en Ecosistemas y Sustentabilidad (IIES) Universidad Nacional Autónoma de México Morelia Michoacán Mexico
| | - Roberto Munguía‐Steyer
- Facultad de Estudios Superiores Iztacala (FES‐Iztacala) Universidad Nacional Autónoma de México Tlalnepantla de Baz Estado de México Mexico
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7
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Lima NGS, Oliveira U, Souza RCC, Eterovick PC. Dynamic and diverse amphibian assemblages: Can we differentiate natural processes from human induced changes? PLoS One 2019; 14:e0214316. [PMID: 30913242 PMCID: PMC6435182 DOI: 10.1371/journal.pone.0214316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Accepted: 03/11/2019] [Indexed: 11/29/2022] Open
Abstract
Amphibians are sensitive to anthropogenic habitat alterations but also respond to natural drivers of assemblage composition at many levels. Additionally, they are usually hard to detect in field inventories. We used a multiscale approach, from microhabitat to the landscape levels, to try to understand the effects of natural changes, and try to distinguish them from the effects of landscape level anthropogenic changes, on dynamic and diverse anuran assemblages, taking imperfect detection into account. We conducted thorough field inventories in 16 streams at Serra do Cipó, in the southern portion of Espinhaço Mountain Range, southeastern Brazil, during two time periods separated by 16 years. We compared species richness and diversity between periods, sampling both tadpoles and adult frogs. We quantified tadpole microhabitat availability, alterations in immediate riparian vegetation, and changes in classes of land cover within buffers around streams (adult habitats) to test for their effects on species composition. We also tested for effects of human occupancy around streams on nestedness and turnover components of species diversity. Microhabitats and riparian vegetation explained some of the changes in species composition (or detection) between time periods. Nestedness seemed to be influenced by the stability of the landscape. Detectabilities were too low to support robust occupancy estimates for most species. Natural changes in local habitats occupied by anurans in montane meadows are likely to influence species distribution. Some species with robust estimates experienced change in their occupancy over the studied 16-year interval, although no anthropogenic causes could be directly associated with such changes. The low detectability of most species, even with thorough sampling effort, makes it very hard to detect amphibian declines and possibly tell them apart from natural population fluctuations. New techniques are needed that improve species detectability in such diverse tropical habitats.
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Affiliation(s)
- Nathália G. S. Lima
- Programa de Pós-Graduação em Ecologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Ubirajara Oliveira
- Centro de Sensoriamento Remoto, Instituto de Geociências, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Rafael C. C. Souza
- Programa de Pós-Graduação em Biologia de Vertebrados, Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
| | - Paula C. Eterovick
- Programa de Pós-Graduação em Biologia de Vertebrados, Pontifícia Universidade Católica de Minas Gerais, Belo Horizonte, Minas Gerais, Brasil
- * E-mail:
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8
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Giaretta AA, da Silva WR, Facure KG. Oviposition site selection in two basin-digging Leptodactylus Fitzinger, 1826 (Anura). TROPICAL ZOOLOGY 2019. [DOI: 10.1080/03946975.2018.1542246] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ariovaldo A. Giaretta
- Laboratório de Taxonomia, Sistemática e Ecologia de Anuros Neotropicais, Instituto de Ciências Exatas e Naturais do Pontal, Universidade Federal de Uberlândia, Rua 20, 1600, Bairro Tupã, Ituiutaba, MG 38304-402, Brazil
| | - Wagner R. da Silva
- Laboratório de Taxonomia, Sistemática e Ecologia de Anuros Neotropicais, Instituto de Ciências Exatas e Naturais do Pontal, Universidade Federal de Uberlândia, Rua 20, 1600, Bairro Tupã, Ituiutaba, MG 38304-402, Brazil
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas, Naturais e Educação (ICENE), Universidade Federal do Triângulo Mineiro (UFTM), Av. Dr. Randolfo Borges, 1400 – Univerdecidade, Uberaba, MG 38064-200, Brazil
| | - Kátia G. Facure
- Laboratório de Taxonomia, Sistemática e Ecologia de Anuros Neotropicais, Instituto de Ciências Exatas e Naturais do Pontal, Universidade Federal de Uberlândia, Rua 20, 1600, Bairro Tupã, Ituiutaba, MG 38304-402, Brazil
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9
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Gilioli KC, Kéry M, Guimarães M. Unraveling fine-scale habitat use for secretive species: When and where toads are found when not breeding. PLoS One 2018; 13:e0205304. [PMID: 30296275 PMCID: PMC6175507 DOI: 10.1371/journal.pone.0205304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 08/31/2018] [Indexed: 11/18/2022] Open
Abstract
A good understanding of species-habitat associations, or habitat use, is required to establish conservation strategies for any species. Many amphibian species are elusive and most information concerning amphibian habitat use comes from breeding sites where they are comparatively easy to find and study. Knowledge about retreat sites is extremely limited for most species and for the greater part of the year. For such species, it is especially important to factor in detection probability in habitat analyses, because otherwise distorted views about habitat preferences may result, e.g., when a species is more visible in habitat type B than in A, even though A may be preferred. The South American red-belly toad, Melanophryniscus pachyrhynus, is a range-restricted species from Southern Brazil and Uruguay that inhabits open areas with rocky outcrops and is usually seen only during explosive breeding events. Here we studied the fine-scale habitat use of the red-belly toad outside of the breeding season to identify retreat sites and test for the importance of accounting for species imperfect detection, using Bayesian occupancy models. We identified shrub density and the number of loose rocks as important predictors of occupancy, while detection probability was highest at intermediate temperatures. Considering the harsh (dry and hot) conditions of rocky outcrops, shrubs and loose rocks may both work as important refuges, besides providing food resources and protecting against predation. Rocky outcrops have been suffering changes in habitat configuration and we identify nonbreeding habitat preferences at a fine scale, which may help to promote population persistence, and highlight the importance of accounting for imperfect detection when studying secretive species.
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Affiliation(s)
- Karoline C. Gilioli
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Marc Kéry
- Swiss Ornithological Institute, Sempach, Switzerland
| | - Murilo Guimarães
- Departamento de Zoologia, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
- * E-mail:
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10
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Borzée A, Andersen D, Jang Y. Population trend inferred from aural surveys for calling anurans in Korea. PeerJ 2018; 6:e5568. [PMID: 30258708 PMCID: PMC6151124 DOI: 10.7717/peerj.5568] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 08/13/2018] [Indexed: 11/23/2022] Open
Abstract
Amphibian populations fluctuate naturally in size and range and large datasets are required to establish trends in species dynamics. To determine population trends for the endangered Suweon Treefrog (Dryophytes suweonensis), we conducted aural surveys in 2015, 2016, and 2017 at each of 122 sites where the species was known to occur in the Republic of Korea. Despite being based on individual counts, the focus of this study was to establish population trends rather than population size estimates, and we found both environmental and landscape variables to be significant factors. Encroachment was also a key factor that influenced both the decreasing number of calling individuals and the negative population dynamics, represented here by the difference in the number of calling individuals between years. Generally, most sites displayed minimal differences in the number of calling males between years, although there was a large fluctuation in the number of individuals at some sites. Finally, when adjusted for the overall population size difference between years, we found the population size to be decreasing between 2015 and 2017, with a significant decrease in the number of calling individuals at specific sites. High rate of encroachment was the principal explanatory factor behind these marked negative peaks in population dynamics.
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Affiliation(s)
- Amaël Borzée
- Laboratory of Behavioral Ecology and Evolution, School of Biological Sciences, Seoul National University, Seoul, South Korea
- Division of EcoScience, Ewha Women’s University, Seoul, South Korea
| | - Desiree Andersen
- Division of EcoScience, Ewha Women’s University, Seoul, South Korea
| | - Yikweon Jang
- Division of EcoScience, Ewha Women’s University, Seoul, South Korea
- Department of Life Sciences, Ewha Womans University, Seoul, Republic of Korea
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11
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Thorpe CJ, Lewis TR, Fisher MC, Wierzbicki CJ, Kulkarni S, Pryce D, Davies L, Watve A, Knight ME. Climate structuring of Batrachochytrium dendrobatidis infection in the threatened amphibians of the northern Western Ghats, India. ROYAL SOCIETY OPEN SCIENCE 2018; 5:180211. [PMID: 30110422 PMCID: PMC6030269 DOI: 10.1098/rsos.180211] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 05/04/2018] [Indexed: 05/08/2023]
Abstract
Batrachochytrium dendrobatidis (Bd) is a pathogen killing amphibians worldwide. Its impact across much of Asia is poorly characterized. This study systematically surveyed amphibians for Bd across rocky plateaus in the northern section of the Western Ghats biodiversity hotspot, India, including the first surveys of the plateaus in the coastal region. These ecosystems offer an epidemiological model system since they are characterized by differing levels of connectivity, edaphic and climatic conditions, and anthropogenic stressors. One hundred and eighteen individuals of 21 species of Anura and Apoda on 13 plateaus ranging from 67 to 1179 m above sea level and 15.89 to 17.92° North latitude were sampled. Using qPCR protocols, 79% of species and 27% of individuals tested were positive for Bd. This is the first record of Bd in caecilians in India, the Critically Endangered Xanthophryne tigerina and Endangered Fejervarya cf. sahyadris. Mean site prevalence was 28.15%. Prevalence below the escarpment was 31.2% and 25.4% above. The intensity of infection (GE) showed the reverse pattern. Infection may be related to elevational temperature changes, thermal exclusion, inter-site connectivity and anthropogenic disturbance. Coastal plateaus may be thermal refuges from Bd. Infected amphibians represented a wide range of ecological traits posing interesting questions about transmission routes.
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Affiliation(s)
- Christopher J. Thorpe
- Ecology, Behaviour and Evolution Research Group, School of Biological and Marine Sciences, University of Plymouth, Drake Circus, Plymouth, Devon PL4 8AA, UK
| | - Todd R. Lewis
- Westfield, 4 Worgret Road, Wareham, Dorset BH20 4PJ, UK
| | - Matthew C. Fisher
- Department of Infectious Disease Epidemiology, Imperial College London, London W2 1PG, UK
| | - Claudia J. Wierzbicki
- Department of Infectious Disease Epidemiology, Imperial College London, London W2 1PG, UK
| | - Siddharth Kulkarni
- Department of Biological Sciences, George Washington University, 2121 I St NW, Washington, DC 20052, USA
| | - David Pryce
- Ecology, Behaviour and Evolution Research Group, School of Biological and Marine Sciences, University of Plymouth, Drake Circus, Plymouth, Devon PL4 8AA, UK
| | - Lewis Davies
- Ecology, Behaviour and Evolution Research Group, School of Biological and Marine Sciences, University of Plymouth, Drake Circus, Plymouth, Devon PL4 8AA, UK
| | - Aparna Watve
- Tata Institute of Social Sciences, Apsinga Road, PO Box No. 09, Tuljapur 413 601, District-Osmanabad, Maharashtra, India
| | - Mairi E. Knight
- Ecology, Behaviour and Evolution Research Group, School of Biological and Marine Sciences, University of Plymouth, Drake Circus, Plymouth, Devon PL4 8AA, UK
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Barata IM, Griffiths RA, Ridout MS. The power of monitoring: optimizing survey designs to detect occupancy changes in a rare amphibian population. Sci Rep 2017; 7:16491. [PMID: 29184083 PMCID: PMC5705711 DOI: 10.1038/s41598-017-16534-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 11/10/2017] [Indexed: 11/25/2022] Open
Abstract
Biodiversity conservation requires reliable species assessments and rigorously designed surveys. However, determining the survey effort required to reliably detect population change can be challenging for rare, cryptic and elusive species. We used a tropical bromeliad-dwelling frog as a model system to explore a cost-effective sampling design that optimizes the chances of detecting a population decline. Relatively few sampling visits were needed to estimate occupancy and detectability with good precision, and to detect a 30% change in occupancy with 80% power. Detectability was influenced by observer expertise, which therefore also had an effect on the sampling design - less experienced observers require more sampling visits to detect the species. Even when the sampling design provides precise parameter estimates, only moderate to large changes in occupancy will be detected with reliable power. Detecting a population change of 15% or less requires a large number of sites to be surveyed, which might be unachievable for range-restricted species occurring at relatively few sites. Unless there is high initial occupancy, rare and cryptic species will be particularly challenging when it comes to detecting small population changes. This may be a particular issue for long-term monitoring of amphibians which often display low detectability and wide natural fluctuations.
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Affiliation(s)
- Izabela M Barata
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Canterbury, Kent, CT2 7NR, UK.
| | - Richard A Griffiths
- Durrell Institute of Conservation and Ecology, School of Anthropology and Conservation, University of Kent, Canterbury, Kent, CT2 7NR, UK
| | - Martin S Ridout
- National Centre for Statistical Ecology, School of Mathematics, Statistics and Actuarial Science, University of Kent, Canterbury, Kent, CT2 7NF, UK
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Martins LF, Guimarães M, Verrastro L. Population Estimates for the Sand Lizard,Liolaemus arambarensis: Contributions to the Conservation of an Endemic Species of Southern Brazil. HERPETOLOGICA 2017. [DOI: 10.1655/herpetologica-d-16-00046.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Lídia Farias Martins
- Department of Zoology, Federal University of Rio Grande do Sul, Avenida Bento Gonçalves 9500, CEP 91540-000, Porto Alegre, Rio Grande do Sul, Brazil
| | - Murilo Guimarães
- Department of Zoology, Federal University of Rio Grande do Sul, Avenida Bento Gonçalves 9500, CEP 91540-000, Porto Alegre, Rio Grande do Sul, Brazil
| | - Laura Verrastro
- Department of Zoology, Federal University of Rio Grande do Sul, Avenida Bento Gonçalves 9500, CEP 91540-000, Porto Alegre, Rio Grande do Sul, Brazil
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14
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Sousa HCD, Soares AHS, Costa BM, Pantoja DL, Caetano GH, Queiroz TAD, Colli GR. Fire Regimes and the Demography of the LizardMicrablepharus atticolus(Squamata, Gymnophthalmidae) in a Biodiversity Hotspot. SOUTH AMERICAN JOURNAL OF HERPETOLOGY 2015. [DOI: 10.2994/sajh-d-15-00011.1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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15
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McCaffery R, Richards-Zawacki CL, Lips KR. The demography of Atelopus decline: Harlequin frog survival and abundance in central Panama prior to and during a disease outbreak. Glob Ecol Conserv 2015. [DOI: 10.1016/j.gecco.2015.07.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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16
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Spatial and temporal variation in population dynamics of Andean frogs: Effects of forest disturbance and evidence for declines. Glob Ecol Conserv 2014. [DOI: 10.1016/j.gecco.2014.06.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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17
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Guimarães M, Munguía-Steyer R, Doherty PF, Martins M, Sawaya RJ. Population dynamics of the critically endangered golden lancehead pitviper, Bothrops insularis: stability or decline? PLoS One 2014; 9:e95203. [PMID: 24755842 PMCID: PMC3995933 DOI: 10.1371/journal.pone.0095203] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Accepted: 03/24/2014] [Indexed: 11/18/2022] Open
Abstract
Little is known about vital rates of snakes generally because of the difficulty in collecting data. Here we used a robust design mark-recapture model to estimate survival, behavioral effects on capture probability, temporary emigration, abundance and test the hypothesis of population decline in the golden lancehead pitviper, Bothrops insularis, an endemic and critically endangered species from southeastern Brazil. We collected data at irregular intervals over ten occasions from 2002 to 2010. Survival was slightly higher in the wet season than in the dry season. Temporal emigration was high, indicating the importance of accounting for this parameter both in the sampling design and modeling. No behavioral effects were detected on capture probability. We detected an average annual population decrease ( = 0.93, CI = 0.47–1.38) during the study period, but estimates included high uncertainty, and caution in interpretation is needed. We discuss the potential effects of the illegal removal of individuals and the implications of the vital rates obtained for the future persistence and conservation of this endemic, endangered species.
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Affiliation(s)
- Murilo Guimarães
- Departamento de Biologia Animal, Instituto de Biologia, Universidade Estadual de Campinas, Campinas, São Paulo, Brazil
- * E-mail:
| | - Roberto Munguía-Steyer
- FES-Iztacala, Universidad Nacional Autónoma de México, D.F., Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Estado de México, México
| | - Paul F. Doherty
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado, United States of America
| | - Marcio Martins
- Departamento de Ecologia, Instituto de Biociências, Universidade de São Paulo, São Paulo, São Paulo, Brazil
| | - Ricardo J. Sawaya
- Departamento de Ciências Biológicas, Universidade Federal de São Paulo, Diadema, São Paulo, Brazil
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