152,533 research outputs found

    SCMMSN species fact sheet

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    The South Carolina Marine Mammal Stranding Network is administered by Coastal Carolina University under the authority of the National Oceanic and Atmospheric Administration. This fact sheets contain information about the Atlantic white-sided dolphin, its conservation status, and other vital information to report strandings

    SCMMSN species fact sheet

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    The South Carolina Marine Mammal Stranding Network is administered by Coastal Carolina University under the authority of the National Oceanic and Atmospheric Administration. This fact sheets contain information about the Humpback whale, its conservation status, and other vital information to report strandings

    Automatic Recognition of Mammal Genera on Camera-Trap Images using Multi-Layer Robust Principal Component Analysis and Mixture Neural Networks

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    The segmentation and classification of animals from camera-trap images is due to the conditions under which the images are taken, a difficult task. This work presents a method for classifying and segmenting mammal genera from camera-trap images. Our method uses Multi-Layer Robust Principal Component Analysis (RPCA) for segmenting, Convolutional Neural Networks (CNNs) for extracting features, Least Absolute Shrinkage and Selection Operator (LASSO) for selecting features, and Artificial Neural Networks (ANNs) or Support Vector Machines (SVM) for classifying mammal genera present in the Colombian forest. We evaluated our method with the camera-trap images from the Alexander von Humboldt Biological Resources Research Institute. We obtained an accuracy of 92.65% classifying 8 mammal genera and a False Positive (FP) class, using automatic-segmented images. On the other hand, we reached 90.32% of accuracy classifying 10 mammal genera, using ground-truth images only. Unlike almost all previous works, we confront the animal segmentation and genera classification in the camera-trap recognition. This method shows a new approach toward a fully-automatic detection of animals from camera-trap images

    Mammal fauna during the Late Pleistocene and Holocene in the far northeast of Europe

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    The paper summarises materials on the mammal remains in northeastern Europe, dated by radiocarbon. Altogether, 23 local faunas of small mammals and 47 local faunas of large mammals were analysed. Multidimensional statistical analysis shows a strong correlation between changes in small mammal fauna composition and climate changes throughout time. The correlations with the spatial gradients, however, are less pronounced. The faunas are classified into three groups: (1) faunas of Holocene age; (2) Late Pleistocene ‘stadial’ assemblages; and (3) Late Pleistocene ‘interstadial’ assemblages. In some cases, changes in species abundance are better understood in terms of biotic interrelations rather than of climatic effects. The most pronounced change in small mammal fauna composition and structure occurred at the Preboreal/Boreal boundary, and a less conspicuous alteration took place at the LGM/Lateglacial transition. The most noticeable transformation in the large mammal fauna composition is dated to the early Holocene. Less significant changes are observed at the Middle Weichselian/LGM transition and at the LGM/Lateglacial transition. It is safely concluded that variations in the faunas of small and large mammals recorded in NE Europe during the last 35 000 years occurred synchronously and unidirectionally.

    The Gelasian (Late Villanyan-MN17) diversified micromammal assemblage with Mimomys pliocaenicus from Coste San Giacomo (Anagni basin, central Italy), taxonomy and comparison with selected european sites

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    The Gelasian site of Coste San Giacomo (CSG) (central Italy) provides a unique opportunity to investigate the faunal and environmental changes occurred in Mediterranean Europe during the Early Pleistocene. The finding of both large and small mammal fauna has a great biochronological and palaeoenvironmental value. In this work the description of the small mammal assemblage is presented and discussed in detail for the first time. Twelve taxa, belonging to three orders, have been in fact identified and described (six Rodentia, one Lagomorpha and five Eulipotyphla). In particular, the CSG small mammal assemblage has provided the largest collection in Europe of Mimomys pliocaenicus and, for this reason, it can be considered as a reference. Finally, the occurrence of the Desmaninae subfamily is reported for the first time in Italy. © 2015 Associazione Teriologica Italiana

    SCMMSN species fact sheet

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    The South Carolina Marine Mammal Stranding Network is administered by Coastal Carolina University under the authority of the National Oceanic and Atmospheric Administration. This fact sheets contain information about the Atlantic Spotted Dolphin, its conservation status, and other vital information to report strandings

    SCMMSN species fact sheet

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    The South Carolina Marine Mammal Stranding Network is administered by Coastal Carolina University under the authority of the National Oceanic and Atmospheric Administration. This fact sheets contain information about the pygmy killer whale, its conservation status, and other vital information to report strandings

    SCMMSN species fact sheet

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    The South Carolina Marine Mammal Stranding Network is administered by Coastal Carolina University under the authority of the National Oceanic and Atmospheric Administration. This fact sheets contain information about the North Atlantic right whale, its conservation status, and other vital information to report strandings

    SCMMSN species fact sheet

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    The South Carolina Marine Mammal Stranding Network is administered by Coastal Carolina University under the authority of the National Oceanic and Atmospheric Administration. This fact sheets contain information about the Blainville's beaked whale, its conservation status, and other vital information to report strandings

    SCMMSN species fact sheet

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    The South Carolina Marine Mammal Stranding Network is administered by Coastal Carolina University under the authority of the National Oceanic and Atmospheric Administration. This fact sheets contain information about the short-finned pilot whale, its conservation status, and other vital information to report strandings
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