Results 21 to 30 of about 501,741 (157)
Journal of Marine Science and Engineering, 2021 The dolphins Inia geoffrensis—boto and Sotalia fluviatilis—tucuxi are threatened cetaceans inhabiting river ecosystems in South America; population numbers are still lacking for many areas.
Mariana Paschoalini +10 more
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Egyptian Vulture in the Karatau Mountains and Adjacent Territories, Kazakhstan
Пернатые хищники и их охрана, 2022 Egyptian Vulture (Neophron percnopterus) is a globally threatened species. The northernmost limit of its breeding range is located in Kazakhstan and is fragmented into three large enclaves. The Karatau range is one such enclave. It was previously assumed
Igor V. Karyakin +5 more
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Adaptive k-tree sample plot for the estimation of stem density: An empirical approach
Journal of Forest Science, 2018 Available budgets for the inventory of non-commercial woodlands are small. Therefore, there has been increased interest in using distance methods, such as k-tree sampling, which are faster than fixed plot sampling.
Hormoz SOHRABI
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Line transect estimates of Irrawaddy dolphin abundance along the eastern Gulf Coast of Thailand.
Frontiers in Marine Science, 2015 Effective conservation of coastal marine mammals is largely dependent on reliable knowledge of their abundance, as well as the ecological and human factors driving their distribution.
Ellen eHines +6 more
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Ecological Solutions and Evidence, 2021 Monitoring trends in animal populations is essential for the development of appropriate wildlife management strategies. However, long‐term studies are difficult to maintain mainly due to the lack of continuous funding. In this scenario, the collaboration
João Carvalho +4 more
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SAMPLING VARIANCES OF HETEROZYGOSITY AND GENETIC DISTANCE [PDF]
Genetics, 1974 ABSTRACT Mathematical formulae for the sampling variances of average heterozygosity and Nei's genetic distance are developed. These sampling variances are decomposed into their two components, i.e. the inter-locus and intra-locus variances. The relationship between the number of loci and the number of individuals per locus to be examined
M, Nei, A K, Roychoudhury
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Diversity, 2021 Parrots stand out among birds because of their poor conservation status and the lack of available information on their population sizes and trends. Estimating parrot abundance is complicated by the high mobility, gregariousness, patchy distributions, and
José L. Tella +14 more
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Frontiers in Marine Science, 2022 Population abundance and density estimates provide key information for conservation assessment and prioritization of efforts and management. However, data are still largely unavailable for many taxa, including sea snakes, which appear to be facing global
Brooke L. Bessesen +4 more
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Evaluation of the distance sampling technique to monitor gregarious species: A simulation exercise
Wildlife Society Bulletin, 2023 Wildlife count data are used to provide estimates of population abundance. To quantify changes in the size of populations, it is necessary to determine the precision of abundance estimates.
Arthur Jacquemin +4 more
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Ecology and Evolution, 2021 The purpose of many wildlife population studies is to estimate density, movement, or demographic parameters. Linking these parameters to covariates, such as habitat features, provides additional ecological insight and can be used to make predictions for ...
Timothy A. Gowan +2 more
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