| application of ovine luteinizing hormone (lh) radioimmunoassay in the quantitation of lh in different mammalian species. | a sensitive double antibody radioimmunoassay has been developed for measuring luteinizing hormone (lh) in various african mammalian species, using rabbit anti-ovine lh serum (gdn 15) and radioiodinated rat lh or ovine lh. serum and pituitary homogenates from some african mammals (hyrax, reedbuck, sable, impala, tsessebe, thar, spring-hare, ground squirrel and cheetah, as well as the domestic sheep, cow and horse and laboratory rat and hamster) produced displacement curves parallel to that of the ... | 1977 | 330153 |
| parasites of domestic and wild animals in south africa. xxvi. the mosaic of ixodid tick infestations on birds and mammals in the mountain zebra national park. | sixteen species of ixodid ticks were collected over varying periods of time from 6 species of ground-frequenting birds and 15 species of small and large mammals in the mountain zebra national park, karoo, cape province. margaropus winthemi followed by rhipicephalus glabroscutatum and rhipicephalus evertsi evertsi were the most abundant species. the host preferences of 14 tick species and the seasonal abundances of 13 species were determined. small numbers of immature stages of only a few tick sp ... | 1991 | 1923374 |
| notes on african haemaphysalis ticks. ix. h. (rhipistoma) pedetes sp. n., a relict parasite of the springhare (rodentia: pedetidae) in transvaal (ixodoidea: ixodidae). | | 1972 | 5078605 |
| molecular phylogeny of the springhare, pedetes capensis, based on mitochondrial dna sequences. | the phylogenetic position of the pedetidae, represented by a single species pedetes capensis, is controversial, reflecting in part the retention of both hystricomorphous and sciurognathous characteristics in this rodent. in an attempt to clarify the species evolutionary relationships, mtdna gene sequences from 10 rodent species (representing seven families) were analyzed using phenetic, parsimony, and maximum-likelihood methods of phylogenetic inference; the rabbit, oryctolagus cuniculus (order ... | 1997 | 9000750 |
| on dipetalonema manson-bahri n.sp., from the spring-hare, pedetes surdaster larvalis, with a note on its development in fleas. | | 1961 | 13728280 |
| hosts, seasonality and geographic distribution of the south african tortoise tick, amblyomma marmoreum. | the tortoise tick amblyomma marmoreum was collected from large numbers of reptiles and other animals during the course of numerous surveys conducted in south africa. a total of 1229 ticks, of which 550 were adults, were recovered from 309 reptiles belonging to 13 species, with leopard tortoises, geochelone pardalis being the most heavily infested. the 269 birds sampled harboured 4901 larvae, 217 nymphs and no adult ticks, and the prevalence of infestation was greatest on helmeted guineafowls, nu ... | 2006 | 16715875 |
| description of four new species of haemaphysalis koch, 1844 (acari: ixodidae) from the h. (rhipistoma) spinulosa subgroup, parasites of carnivores and rodents in africa. | haemaphysalis (rhipistoma) bochkovi n. sp., h. (r.) burkinae n. sp., h. (r.) horaki n. sp. and h. (r.) walkerae n. sp. (acari: ixodidae), are described based on males and females. adults of h. bochkovi n. sp. were collected from the marsh mongoose, atilax paludinosus (cuvier) (carnivora: herpestidae) and the spotted-necked otter, hydrictis maculicollis (lichtenstein) (carnivora: mustelidae) in côte d'ivoire and liberia; adults of h. burkinae n. sp. were collected from the rusty-spotted genet, ge ... | 2019 | 31441012 |
| mastication in springhares, pedetes capensis: a cineradiographic study. | analysis of lateral and dorsoventral radiographic films shows that ingestion, transport, and mastication in pedetes capensis (rodentia) are cyclic and their movement patterns are essentially similar for the three food types offered. during the ingestion cycle, closing of the mouth is accompanied by a backward translation of the condyles, so that movement is predominantly orthal. during the opening stage, the extent of the anterior condylar translation is smaller. as a result the mandibular incis ... | 1990 | 29865740 |
| the fetal membranes of pedetes capensis, and their taxonomic significance. | | 1969 | 5765558 |
| annual reproductive pattern in the springhaas, pedetes capensis. | the springhaas, pedetes capensis, is capable of breeding throughout the year in the orange free state province of south africa and fetuses of all sizes were found throughout the year. the highest incidence of pregnancies was found during the winter months july and august with the majority of embryos and small fetuses occurring between april and july and most larger fetuses thereafter. birth weight was probably 280-300 g. juveniles stay in the burrows until they have attained a body mass of 1.5 k ... | 1980 | 7359483 |
| ecology of spiders inhabiting abandoned mammal burrows in south african savanna. | in the nylsvley nature reserve, in the south african savanna, the spider community in 320 abandoned mammal burrows was investigated. three species, agelena ocellata (agelenidae), euprosthenops proximus (pisauridae) and smeringopus pallidus (pholcidae), coexisted in the burrows. the number of individuals and the number of species inhabiting the burrows increased with burrow size. gerbil burrows were apparently too small to provide space for more than one individual of any of the three species. on ... | 1988 | 28312212 |
| wildlife population dynamics in human-dominated landscapes under community-based conservation: the example of nakuru wildlife conservancy, kenya. | wildlife conservation is facing numerous and mounting challenges on private and communal lands in africa, including in kenya. we analyze the population dynamics of 44 common wildlife species in relation to rainfall variation in the nakuru wildlife conservancy (nwc), located in the nakuru-naivasha region of kenya, based on ground total counts carried out twice each year from march 1996 to may 2015. rainfall in the region was quasi-periodic with cycle periods dependent on the rainfall component an ... | 2017 | 28103269 |
| jumping and gliding rodents: mitogenomic affinities of pedetidae and anomaluridae deduced from an rna-seq approach. | an rna-seq strategy was used to obtain the complete set of protein-coding mitochondrial genes from two rodent taxa. thanks to the next generation sequencing (ngs) 454 approach, we determined the complete mitochondrial dna genome from graphiurus kelleni (mammalia: rodentia: gliridae) and partial mitogenome from pedetes capensis (pedetidae), and compared them with published rodent and outgroup mitogenomes. we finished the mitogenome sequencing by a series of amplicons using conserved pcr primers t ... | 2013 | 23973722 |
| diversification and biogeography of the neotropical caviomorph lineage octodontoidea (rodentia: hystricognathi). | the rodent superfamily octodontoidea comprises 6 families, 38 genera, and 193 living species of spiny rats, tuco-tucos, degus, hutias, and their relatives. all are endemic to the neotropical region where they represent roughly three-quarters of extant caviomorphs. although caviomorph monophyly is well established and phylogenetic hypotheses exist for several families, understanding of octodontoid relationships is clouded by sparse taxon sampling and single-gene analyses. we examined sequence var ... | 2012 | 22327013 |
| tracking genome organization in rodents by zoo-fish. | the number of rodent species examined by modern comparative genomic approaches, particularly chromosome painting, is limited. the use of human whole-chromosome painting probes to detect regions of homology in the karyotypes of the rodent index species, the mouse and rat, has been hindered by the highly rearranged nature of their genomes. in contrast, recent studies have demonstrated that non-murid rodents display more conserved genomes, underscoring their suitability for comparative genomic and ... | 2008 | 18266061 |
| variance of molecular datings, evolution of rodents and the phylogenetic affinities between ctenodactylidae and hystricognathi. | the von willebrand factor (vwf) gene has been used to understand the origin and timing of rodentia evolution in the context of placental phylogeny vwf exon 28 sequences of 15 rodent families and eight non-rodent eutherian clades are analysed with two different molecular dating methods (uniform clock on a linearized tree; quartet dating). three main conclusions are drawn from the study of this nuclear exon. first, ctenodactylidae (gundis) and hystricognathi (e.g. porcupines, guinea-pigs, chinchil ... | 2000 | 10722222 |
| the determinants of the step frequency in running, trotting and hopping in man and other vertebrates. | 1. during each step of running, trotting or hopping part of the gravitational and kinetic energy of the body is absorbed and successively restored by the muscles as in an elastic rebound. in this study we analysed the vertical motion of the centre of gravity of the body during this rebound and defined the relationship between the apparent natural frequency of the bouncing system and the step frequency at the different speeds. 2. the step period and the vertical oscillation of the centre of gravi ... | 1988 | 3404473 |
| muscle weights and succinic dehydrogenase distribution in the hind limb musculature of two rodents (thryonomys gregorianus and pedetes capensis) with different locomotory habits. | the hind limb muscles of the spring hare (pedetes capensis) were found to be relatively heavier than the hind limb muscles of the cane rat (thryonomys gregorianus). the distribution of succine dehydrogenase activity was investigated in four of these muscles (m. gluteus superficialis, m.semimembranosus, m. biceps femoris and m.rectus femoris) from both animals. it was found that the spring hare had a higher proportion of low-activity fibres in all four muscles than the cane rat. all muscle fibre ... | 1978 | 685649 |
| observations on the leydig cells in the male east african spring hare (pedetes surdaster larvalis). | the morphology of leydig cells of the testis of sexually mature and sexually immature spring hares was studied. the cytoplasm of the leydig of cells the sexually immature spring hares was packed with large lipid droplets leaving little space for the other organelles. smooth endoplasmic reticulum was poorly developed and occasionally formed concentric layers of fenestrated cisterns around the large lipid droplets. the leydig of cells the sexually mature spring hares were almost devoid of lipid dr ... | 1979 | 473861 |
| mechanical work in terrestrial locomotion: two basic mechanisms for minimizing energy expenditure. | the work done during each step to lift and to reaccelerate (in the forward direction) and center of mass has been measured during locomotion in bipeds (rhea and turkey), quadrupeds (dogs, stump-tailed macaques, and ram), and hoppers (kangaroo and springhare). walking, in all animals (as in man), involves an alternate transfer between gravitational-potential energy and kinetic energy within each stride (as takes place in a pendulum). this transfer is greatest at intermediate walking speeds and ca ... | 1977 | 411381 |
| functional morphology of the ankle extensor muscle-tendon units in the springhare pedetes capensis shows convergent evolution with macropods for bipedal hopping locomotion. | this study assesses the functional morphology of the ankle extensor muscle-tendon units of the springhare pedetes capensis, an african bipedal hopping rodent, to test for convergent evolution with the australian bipedal hopping macropods. we dissect and measure the gastrocnemius, soleus, plantaris, and flexor digitorum longus in 10 adult springhares and compare them against similar-sized macropods using phylogenetically informed scaling analyses. we show that springhares align reasonably well wi ... | 2020 | 32584456 |
| putting the spring back into the hare (pedetes capensis): meat chemical composition of an underutilized protein source. | alternative protein sources are gaining increasing global attention as a solution to address future protein demands. determining the chemical composition of meat alternatives is vital to confirm that it is nutritious, but also to increase product value and promote its utilization. the carcass characteristics and chemical composition of springhare, an underutilized protein source, was found to be comparable to that of commercially reared rabbits. hence, its introduction into the commercial supply ... | 2020 | 32796674 |
| acute filariasis in a springhaas. | a 2-yr old springhaas (pedetes capensis; pedetidae, rodentia) imported into the usa from the republic of south africa was severely debilitated as the result of abberant migrations of adult filaria versterae (filarioidea: filariidae) normally confined to the subcutaneous tissues of this host in africa. some nematodes invaded the peritoneal and thoracic cavities, the pericardial sac and the lungs. invasion of the lungs resulted in life-threatening respiratory distress necessitating euthanasia. fil ... | 1998 | 9476236 |
| osmoregulation and water balance in the springhare (pedetes capensis). | springhares are large rodents that live in arid and semi-arid regions of africa. we deprived springhares of water for periods of up to 7 days to determine what physiological adaptations. if any, enable them to survive in and regions without drinking. during water deprivation, springhares lost up to 30% body weight and produced a mean maximum urine concentration of 2548 mosmol kg-1 with a maximum of 3076 mosmol kg-1 in an individual animal. haematocrit and plasma sodium and potassium concentratio ... | 1999 | 10093902 |
| metabolism and thermoregulation in the springhare (pedetes capensis). | springhares are large, nocturnally active, diurnally fossorial rodents that typically inhabit arid and semi-arid areas. this lifestyle means that they need to balance excessive heat loss when foraging at night against insufficient heat loss in a potentially warm, humid burrow and both of these against the need to minimize water turnover and energy requirements. in this study we investigated metabolism and thermoregulation in these animals. basal metabolic rate averaged 8.62+/-1.37 j g(-1) h(-1) ... | 2003 | 12707795 |
| bov-b-mobilized sines in vertebrate genomes. | two new short retroposon families (sines) have been found in the genome of springhare pedetes capensis (rodentia). one of them, ped-1, originated from 5s rrna, while the other one, ped-2, originated from trna-derived sine id. in contrast to most currently active mammalian sines mobilized by l1 long retrotransposon (line), ped-1 and ped-2 are mobilized by bov-b, a line family of the widely distributed rte clade. the 3' part of these sines originates from two sequences in the 5' and 3' regions of ... | 2008 | 17976929 |
| another look at the foramen magnum in bipedal mammals. | a more anteriorly positioned foramen magnum evolved in concert with bipedalism at least four times within mammalia: once in macropodid marsupials, once in heteromyid rodents, once in dipodid rodents, and once in hominoid primates. here, we expand upon previous research on the factors influencing mammalian foramen magnum position (fmp) and angle with four new analyses. first, we quantify fmp using a metric (basioccipital ratio) not previously examined in a broad comparative sample of mammals. sec ... | 2017 | 28366198 |
| the jaw is a second-class lever in pedetes capensis (rodentia: pedetidae). | the mammalian jaw is often modelled as a third-class lever for the purposes of biomechanical analyses, owing to the position of the resultant muscle force between the jaw joint and the teeth. however, it has been proposed that in some rodents the jaws operate as a second-class lever during distal molar bites, owing to the rostral position of the masticatory musculature. in particular, the infraorbital portion of the zygomatico-mandibularis (iozm) has been suggested to be of major importance in c ... | 2017 | 28875081 |
| ocular comparative anatomy of the family rodentia. | there is little information regarding ocular anatomy and histology in many of the rodent species. histological analyses for morphologic features were performed in 31 globes from 18 rodent species submitted to and archived at the comparative ocular pathology laboratory of wisconsin. the following measurements were taken: thickness of the cornea, corneal epithelium, corneal stroma, descemet's membrane, and retina. h&e sections were evaluated for the following anatomical features: presence of pigme ... | 2013 | 23734597 |
| nuclear organisation of cholinergic, catecholaminergic, serotonergic and orexinergic neurons in two relatively large-brained rodent species-the springhare (pedetes capensis) and beecroft's scaly-tailed squirrel (anomalurus beecrofti). | the present study describes the nuclear organization of the cholinergic, catecholaminergic, serotonergic and orexinergic systems in the brains of the springhare and beecroft's scaly-tailed squirrel following immunohistochemical labelling. we aimed to investigate any differences in the nuclear organization of these neural systems when compared to previous data on other species of rodents, as these two rodent species have relatively large brains - 1.2 to 1.4 times larger than would be expected for ... | 2017 | 28916505 |
| the conflict between cheetahs and humans on namibian farmland elucidated by stable isotope diet analysis. | large areas of namibia are covered by farmland, which is also used by game and predator species. because it can cause conflicts with farmers when predators, such as cheetahs (acinonyx jubatus), hunt livestock, we assessed whether livestock constitutes a significant part of the cheetah diet by analysing the stable isotope composition of blood and tissue samples of cheetahs and their potential prey species. according to isotopic similarities, we defined three isotopic categories of potential prey: ... | 2014 | 25162403 |