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8 results for “Aonyx cinereus”
Data and R code used for the GLMM and NBDA analyses in 'Captive Asian short-clawed otters (Aonyx cinereus) learn to exploit unfamiliar natural prey'
<p>Foraging plays a vital role in animal life histories, learning whether unfamiliar food items are palatable is a key part of this process. Animals that engage in extractive foraging must also learn how to overcome the protective measures of their prey. While otters (subfamily Lutrinae) are a taxon known for their extractive foraging behaviour, how they learn about prey palatability and acquire extractive foraging techniques remains poorly understood. Here we investigated: (i) how captive Asian short-clawed otters (<em>Aonyx cinereus</em>) learned to interact with, and extract meat from, unfamiliar natural prey, and (ii) how their exploitation of such prey compared to their ability to overcome artificial foraging tasks containing familiar food rewards. Network-based diffusion analysis showed that otters learned to interact with unfamiliar natural prey by observing their group mates. However, once interacting with the prey, they learned to extract the meat mainly asocially. In addition, otters took longer to overcome the protective measures of unfamiliar natural prey than those of extractive food puzzles. Asian short-clawed otter populations are declining in the wild. Increasing our understanding of how they learn to overcome novel foraging challenges could help develop pre-release training procedures as part of reintroduction programmes for otter conservation.</p>
Fig. 3 in Morphological and molecular characterization of Cystoisospora sp. from Asian small-clawed otters Aonyx cinereus
Fig. 3. Mid-point rooting tree of Cystoisospora spp. inferred from concatenated alignment of two nucleotide sequences (18S and cox1). Nucleotide sequences of Cystoisospora spp. GenBank/DDBJ/EMBL accession numbers for 18S and cox1 are shown next to species names. Nodal support values (NJ/ML) greater than 60% are represented on ML branches. Scale bar represents 0.01 nucleotide substitutions per sites.
Fig. 2 in Morphological and molecular characterization of Cystoisospora sp. from Asian small-clawed otters Aonyx cinereus
Fig. 2. Line drawing of sporulated oocysts of Cystoisospora rivolta-like oocysts from small-clawed otters. Bar = 10 μm.
Fig. 1 in Morphological and molecular characterization of Cystoisospora sp. from Asian small-clawed otters Aonyx cinereus
Fig. 1. Photographs of Cystoisospora oocysts detected from Asian small-clawed otters. (a and b) Immature oocysts containing one (a) or two sporoblasts (b). (c) Mature oocysts containing two sporocysts, each with four club-shaped sporozoites. Sporozoites contained rounded retractile vacuoles (arrow). (d–f) Sporozoites containing sporocyst residuum, which was composed of numerous small granules (d and e) or a rounded granule (f).
Data and R code used for the GLMM and NBDA analyses in 'Captive Asian short-clawed otters (Aonyx cinereus) learn to exploit unfamiliar natural prey'
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Learning strategies and long-term memory in Asian short-clawed otters (Aonyx cinereus) data
<p>Data submitted here, are those used in the writing of our manuscript entitled "Learning strategies and long-term memory in Asian short-clawed otters (<i>Aonyx cinereus</i>)" which has been submitted to Royal Society Open Science for publication. Abstract for that manuscript is below</p> <p>Social learning, namely learning from information acquired from others or their products, is widespread throughout the animal kingdom. There is growing evidence that animals selectively employ 'social learning strategies', which for example, determine when<i> </i>they should copy others instead of learning asocially, and whom they should copy. Furthermore, once animals have acquired new information, it is beneficial for them to commit it to long-term memory, especially when it concerns the discovery of profitable resources. Research into social learning strategies and long-term memory has covered a wide range of taxa. However, otters (subfamily Lutrinae), popular in zoos due to their sociability and playfulness, remained neglected until a recent study provided evidence of social learning in captive smooth-coated otters (<i>Lutrogale perspicillata</i>), but not in Asian short-clawed otters (<i>Aonyx cinereus</i>). We investigated Asian short-clawed otters' learning strategies and long-term memory performance in a foraging context. We presented novel extractive foraging tasks twice to captive family groups and used network-based diffusion analysis to provide evidence of social learning and long-term memory in this species. A major cause of wild Asian short-clawed otter declines is prey scarcity. Furthering our understanding of how they learn about and remember novel food sources could inform key conservation strategies.</p>
On following pages: 29. Marine Otter (Lontra felina); 30. Neotropical Otter (Lontra longicaudis); 31. Southern River Otter (Lontra provocax); 32. Sea Otter (Enhydra lutris); 33. Spotted-necked Otter (Hydrictis maculicollis); 34. Eurasian Otter (Lutra lutra); 35. Hairy-nosed Otter (Lutra sumatrana); 36. African Clawless Otter (Aonyx capensis); 37. Asian Small-clawed Otter (Aonyx cinereus); 38. Smooth-coated Otter (Lutrogale perspicillata). in Mustelidae
On following pages: 29. Marine Otter (Lontra felina); 30. Neotropical Otter (Lontra longicaudis); 31. Southern River Otter (Lontra provocax); 32. Sea Otter (Enhydra lutris); 33. Spotted-necked Otter (Hydrictis maculicollis); 34. Eurasian Otter (Lutra lutra); 35. Hairy-nosed Otter (Lutra sumatrana); 36. African Clawless Otter (Aonyx capensis); 37. Asian Small-clawed Otter (Aonyx cinereus); 38. Smooth-coated Otter (Lutrogale perspicillata).
Learning strategies and long-term memory in Asian short-clawed otters (Aonyx cinereus) data
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