筛选
科学数据
统计数据
共检索到14条 ,权限内显示50条;
Data from: Adaptability of large carnivores to changing anthropogenic food sources: diet change of spotted hyena (Crocuta crocuta) during Christian
- 负责人：
- Yirga, Gidey
- DOI：
- doi:10.5061/dryad.pq050620
- 摘要：
- . We collected spotted hyena scats before, during and after the fasting period and compared hairs from scat with hairs from a reference collection
Two men with Hyena skin, Dodoma, Tanzania, July-November 1917
- 负责人：
- DOI：
- doi:10.25549/impa-c123-81587
- 摘要：
- \u201CTwo of the boys with a young striped hyaena skin.\u201D Portrait of two men holding an animal skin, the man on the left is probably wearing the uniform of the African Native Medical Corps (ANMC). ? The image is from an album chronicling the war time experiences of Archibald Clive Irvine (1893-1974) in German East Africa and Portuguese East Africa with the Royal Army Medical Corps. During this time he would meet Dr John W Arthur which in turn would lead to his missionary work at Chogoria in Kenya.
Data from: Patterns of livestock depredation and cost-effectiveness of fortified livestock enclosures in northern Tanzania
- 负责人：
- DOI：
- doi:10.5061/dryad.28fr4qh
- 摘要：
- ), spotted hyena (Crocuta crocuta), jackal (Canis mesomelas), and cheetah (Acinonyx jubatus)] raids on fortified (n=45, total 631 monthly visits) and unfortified
Data from: Land‐sharing potential of large carnivores in human‐modified landscapes of western India
- 负责人：
- Majgaonkar, Iravatee M.
- DOI：
- doi:10.5061/dryad.qs13nt1
- 摘要：
- framework, we assessed the distribution of three large carnivore species, the leopard Panthera pardus, Indian grey wolf Canis lupus pallipes and striped hyena Hyaena
Data from: Lifetime selection on a hypoallometric trait in the spotted hyena
- 负责人：
- 关键词：
- Selection Sexual size dimorphism Lifetime reproductive success Body size Allometry Scaling relationship Spotted hyenas
- DOI：
- doi:10.5061/dryad.8688
- 摘要：
- ge terrestrial carnivore, the spotted hyena, which displays a rare pattern of female-biased sexual size dimorphism (SSD). Using path analysis, we investigate
Data from: Society, demography and genetic structure in the spotted hyena
- 负责人：
- DOI：
- doi:10.5061/dryad.tg582
- 摘要：
- ge hyena clan in Kenya. Although social bonds among both kin and non-kin are weakest when resource competition is most intense, hyenas sustain strong
Data from: Trade-offs in lactation and milk intake by competing siblings in a fluctuating environment
- 负责人：
- DOI：
- doi:10.5061/dryad.0m068
- 摘要：
- carnivore, the spotted hyena. In our study population, the energetic cost of lactation is rank dependent and particularly high because large fluctuations
Building blocks of action and goal comprehension in a newborn visual system
- 负责人：
- DOI：
- doi:10.25549/usctheses-c3-317050
- 摘要：
- . A gazelle living in the African grasslands has just seconds to infer the impending action of a stalking leopard or hyena in order to avoid predation
Data from: Juvenile concentrations of IGF-1 predict life-history trade-offs in a wild mammal
- 负责人：
- Lewin, Nora
- DOI：
- doi:10.5061/dryad.h61cv
- 摘要：
- Early postnatal development can have profound effects on life-history traits later in life. One mechanism hypothesized to mediate this relationship is the anabolic hormone, insulin-like growth factor-1 (IGF-1). IGF-1 contributes importantly to postnatal growth, and thus offers a means by which environmental and genetic variation might direct organismal development, reproduction and survival. We tested whether juvenile concentrations of IGF-1 can predict intraspecific variation in life-history traits later in life using longitudinal data from free-living female spotted hyenas (Crocuta crocuta). We found that juvenile concentrations of IGF-1 predicted heavier juvenile mass, which in turn predicted greater survival to reproductive maturity. However, independent of mass, higher juvenile concentrations of IGF-1 predicted earlier age at first parturition and reduced longevity in adulthood. Our results highlight the importance of early postnatal development as a determination period in mammals and suggest that concentrations of IGF-1 during this sensitive period can be used to predict important later-life trade-offs between growth, reproductive fitness and life span in wild, long-lived animals.
Data from: Socioecological predictors of immune defenses in wild spotted hyenas
- 负责人：
- andyflies@gmail.com
- DOI：
- doi:10.5061/dryad.934qn
- 摘要：
- Social rank can profoundly affect many aspects of mammalian reproduction and stress physiology, but little is known about how immune function is affected by rank and other socioecological factors in free-living animals. In this study, we examine the effects of sex, social rank and reproductive status on immune function in long-lived carnivores that are routinely exposed to a plethora of pathogens, yet rarely show signs of disease. Here, we show that two types of immune defences, complement-mediated bacterial killing capacity (BKC) and total IgM, are positively correlated with social rank in wild hyenas, but that a third type, total IgG, does not vary with rank. Female spotted hyenas, which are socially dominant to males in this species, have higher BKC, and higher IgG and IgM concentrations, than do males. Immune defences are lower in lactating than pregnant females, suggesting the immune defences may be energetically costly. Serum cortisol and testosterone concentrations are not reliable predictors of basic immune defences in wild female spotted hyenas. These results suggest that immune defences are costly and multiple socioecological variables are important determinants of basic immune defences among wild hyenas. The effects of these variables should be accounted for when attempting to understand disease ecology and immune function.
