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55 results for “Asian elephant”
FIGURE 2 in New Entodiniomorphid Ciliates, Buetschlia minuta n. sp., B. cirrata n. sp., Charonina elephanti n. sp., from Asian Elephants of Turkey
FIGURE 2. Photomicrographs of B. minuta n. sp., a—in MFS, b-c-d—after pyridinated silver carbonate impregnation. ACZ, adoral ciliary zone; AP, adoral polybrachykinety; C, cytostome; CP, cytoproct; CV, contractile vacuole; MA, macronucleus; MI, micronucleus; SCR, somatic ciliary rows.
FIGURE 7 in New Entodiniomorphid Ciliates, Buetschlia minuta n. sp., B. cirrata n. sp., Charonina elephanti n. sp., from Asian Elephants of Turkey
FIGURE 7. Schematic figures of Charonina elephanti n. sp., a—in MFS from the left side, b—after pyridinated silver carbonate impregnation from the left side. ACZ, adoral ciliary zone; AD, adoral polybrachykinety; CP, cytoproct; CV, contractile vacuole; DCZ, dorsal ciliary zone; DP, dorsal polybrachykinety; DPCZ, dorsal posterior ciliary zone; DPP, dorsal posterior polybrachykinety; MA, macronucleus; MI, micronucleus; V, vestibulum; VF, vestibular fibrils; VO, vestibular opening; VP, vestibular polybrachykinety; VPCZ, ventral posterior ciliary zone; VPP, ventral posterior polybrachykinety.
Predicting barrier effects of transportation networks on Asian elephants: Implications for environmental impact assessment
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Data from: How big is it really? Assessing the efficacy of indirect estimates of body size in Asian elephants
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Data from: Is bigger better? The relationship between size and reproduction in female Asian elephants
The limited availability of resources is predicted to impose trade-offs between growth, reproduction and self-maintenance in animals. However, although some studies have shown that early reproduction suppresses growth, reproduction positively correlates with size in others. We use detailed records from a large population of semi-captive elephants in Myanmar to assess the relationships between size (height and weight), reproduction and survival in female Asian elephants, a species characterized by slow, costly life history. Although female height gain during the growth period overlapped little with reproductive onset in the population, there was large variation in age at first reproduction and only 81% of final weight had been reached by peak age of reproduction at the population level (19 years). Those females beginning reproduction early tended to be taller and lighter later in life, although these trends were not significant. We found that taller females were more likely to have reproduced by a given age, but such effects diminished with age, suggesting there may be a size threshold to reproduction which is especially important in young females. Because size was not linked with female survival during reproductive ages, the diminishing effect of height on reproduction with age is unlikely to be due to biased survival of larger females. We conclude that although reproduction may not always impose significant costs on growth, height may be a limiting factor to reproduction in young female Asian elephants, which could have important implications considering their birth rates are low and peak reproduction is young – 19 years in this population.
Data from: Maternal age at birth shapes offspring life-history trajectory across generations in long-lived Asian elephants
1. Advanced maternal age at birth can have pronounced consequences for offspring health, survival and reproduction. If carried over to the next generation, such fitness effects could have important implications for population dynamics and the evolution of ageing, but these remain poorly understood. While many laboratory studies have investigated maternal age effects, relatively few studies have been conducted in natural populations, and they usually only present a "snapshot" of an offspring's lifetime. 2. In the present study, we focus on how maternal age influences offspring life-history trajectories and performance in a long-lived mammal. 3. We use a multigenerational demographic dataset of semi-captive Asian elephants to investigate maternal age effects on several offspring life-history traits: condition, reproductive success, and overall survival. 4. We show that offspring born to older mothers display reduced overall survival but higher reproductive success, and reduced survival of their own progeny. Our results show evidence of a persistent effect of maternal age on fitness across generations in a long-lived mammal. 5. By highlighting transgenerational effects on the fitness of the next generation associated with maternal age, the present study helps increase our understanding of factors contributing to individual variation in ageing rates and fitness.
Supplementary material 1 from: Thaung R, Frechette J, Luskin MS, Amir Z (2023) Combining Camera Trap Data and Environmental Data to Estimate the Effects of Environmental Gradients on Abundance of the Asian Elephant Elephas maximus in Cambodia. Biodiversity Information Science and Standards 7: e112100. https://doi.org/10.3897/biss.7.112100
Environmental Variables Used in the study
Data from: Is bigger better? The relationship between size and reproduction in female Asian elephants
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Data from: Suitable habitat of the wild Asian elephant in the western Terai of Nepal
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Data from: Maternal age at birth shapes offspring life-history trajectory across generations in long-lived Asian elephants
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Data from: Early reproductive investment, senescence and lifetime reproductive success in female Asian elephants
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Data from: Capture from the wild has long-term costs on reproductive success in Asian elephants
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FIGURE 9 in New Entodiniomorphid Ciliates, Buetschlia minuta n. sp., B. cirrata n. sp., Charonina elephanti n. sp., from Asian Elephants of Turkey
FIGURE 9. SEM images of a-b—C. elephanti n. sp. from the right side, c-d—C. elephanti n. sp. from the left side. ACZ, adoral ciliary zone; DCZ, dorsal ciliary zone; V, vestibulum; VCZ, vestibular ciliary zone; VO, vestibular opening; VPCZ, ventral posterior ciliary zone.
FIGURE 4 in New Entodiniomorphid Ciliates, Buetschlia minuta n. sp., B. cirrata n. sp., Charonina elephanti n. sp., from Asian Elephants of Turkey
FIGURE 4. Schematic figures of Buetschlia cirrata n. sp., a—in MFS, b—after pyridinated silver carbonate impregnation. ACZ, adoral ciliary zone; AP, adoral polybrachykinety; C, cytostome; CP, cytoproct; CTV, concretion vacuole; CV, contractile vacuole; MA, macronucleus; MI, micronucleus; PK, paralabial kineties; SC, somatic cilia; SK, somatic kineties.
FIGURE 8 in New Entodiniomorphid Ciliates, Buetschlia minuta n. sp., B. cirrata n. sp., Charonina elephanti n. sp., from Asian Elephants of Turkey
FIGURE 8. Photomicrographs of C. elephanti n. sp., a—in MFS from the left side, b-c-d—after pyridinated silver carbonate impregnation from the left side. ACZ, adoral ciliary zone; AD, adoral polybrachykinety; CP, cytoproct; CV, contractile vacuole; DCZ, dorsal ciliary zone; DP, dorsal polybrachykinety; DPCZ, dorsal posterior ciliary zone; DPP, dorsal posterior polybrachykinety; MA, macronucleus; MI, micronucleus; V, vestibulum; VF, vestibular fibrils; VO, vestibular opening; VP, vestibular polybrachykinety; VPCZ, ventral posterior ciliary zone; VPP, ventral posterior polybrachykinety.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.