| high levels of dna fragmentation in spermatozoa are associated with inbreeding and poor sperm quality in endangered ungulates. | inbreeding is known to cause deleterious effects upon reproduction and survival, but its effects upon sperm dna integrity have not been examined. in the present study, we analyzed this relationship among three endangered ungulates: gazella cuvieri, gazella dama mhorr, and gazella dorcas neglecta. in addition, we examined whether levels of sperm dna fragmentation are associated with semen quality. the magnitude of sperm dna damage in the two species with high levels of inbreeding (g. cuvieri and ... | 2010 | 20505170 |
| germ cell survival and differentiation after xenotransplantation of testis tissue from three endangered species: iberian lynx (lynx pardinus), cuvier's gazelle (gazella cuvieri) and mohor gazelle (g. dama mhorr). | the use of assisted reproductive techniques for endangered species is a major goal for conservation. one of these techniques, testis tissue xenografting, allows for the development of spermatozoa from animals that die before reaching sexual maturity. to assess the potential use of this technique with endangered species, testis tissue from six iberian lynxes (one fetus, two perinatal cubs, two 6-month-old and one 2-year-old lynx), two cuvier's gazelle fetuses and one 8-month-old mohor gazelle wer ... | 2014 | 23763851 |
| estimates of direct and indirect effects for early juvenile survival in captive populations maintained for conservation purposes: the case of cuvier's gazelle. | together with the avoidance of any negative impact of inbreeding, preservation of genetic variability for life-history traits that could undergo future selective pressure is a major issue in endangered species management programmes. however, most of these programmes ignore that, apart from the direct action of genes on such traits, parents, as contributors of offspring environment, can influence offspring performance through indirect parental effects (when parental genotype and phenotype exerts ... | 2014 | 25505538 |
| output of gastrointestinal nematode eggs in the feces of captive gazelles (gazella dama mhorr, gazella cuvieri and gazella dorcas neglecta) in a semiarid region of southeastern spain. | feces from 62 captive african gazelles, including mhorr gazelles (gazella dama mhorr), cuvier's gazelles (gazella cuvieri), and dorcas gazelles (gazella dorcas neglecta), were examined over the course of a year to quantitate nematode egg excretion patterns. strongyloides sp. eggs appeared only in g. dama during the rainy season. trichostrongylidae egg excretion showed a marked seasonal variation, with very low levels during the dry and hot period, a finding that is probably attributable to hypob ... | 2006 | 17319122 |
| oral administration of mebendazole failed to reduce nematode egg shedding in captive african gazelles. | idiosyncracies are observed in captive wild animals as regards the pharmacokinetics and efficacy of anthelmintics. this could be attributed to such factors as differences in host's metabolism, irregular distribution of anthelmintics due to the way they are administered and worm resistance to anthelmintics. previously mebendazole was found to be poorly effective when administered in feed. an experiment was conducted to evaluate the efficacy of mebendazole when administered at the dosage rate of 1 ... | 2001 | 11403435 |
| inbreeding, fluctuating asymmetry, and ejaculate quality in an endangered ungulate. | an ever-increasing number of species are suffering marked reductions in population size as a consequence of human activities. to understand the impact of these changes it is essential to assess how small population size affects individual fitness and the viability of populations. this issue acquires special relevance among endangered species in which numbers have decreased to such an extent that captive breeding must be established with a few founders. a major risk associated with small populati ... | 1998 | 9493409 |
| hematologic and biochemical observations in gazella dama, g. dorcas and g. cuvieri. | 1. blood samples obtained from 114 animals of three species of the genus gazella (gazella dama, gazella dorcas and gazella cuvieri) were analyzed from hematology (osmotic fragility, red blood cells morphology and hemoglobin electrophoresis) and biochemical values (glucose-6-phosphate dehydrogenase, pyruvate kinase and glutathione reductase deficiencies and superoxide dismutase activity). 2. standard methods were used. hemoglobin polymorphism was found. 3. there was no abnormality in the osmotic ... | 1991 | 1769211 |
| identifying priority conservation areas in a saharan environment by highlighting the endangered cuvier's gazelle as a flagship species. | monitoring populations and designing effective conservation actions for endangered species present significant challenges. an accurate understanding of current distribution, ecological traits and habitat requirements is imperative in formulating conservation strategies. recent surveys on the southernmost cuvier's gazelle (gazella cuvieri) population, an ungulate endemic to north africa, showcase its importance in terms of numbers and genetic diversity. this population inhabits a remote region in ... | 2020 | 32427930 |
| publisher correction: identifying priority conservation areas in a saharan environment by highlighting the endangered cuvier's gazelle as a flagship species. | an amendment to this paper has been published and can be accessed via a link at the top of the paper. | 2020 | 32728071 |
| survey of husbandry practices for bovidae in zoos: the importance of parasite management for reintroduction programmes. | animals from zoological institutions may be used for reintroductions. these individuals are considered healthy, but they are not necessarily free of parasites, despite the minimum husbandry standards required of zoological institutions as described in the european association of zoos and aquaria guidelines. in this sense, parasitism has been identified as the cause of failure, or has added difficulties, in some reintroduction programmes. here the authors attempt to summarise the risk of parasiti ... | 2019 | 30819861 |
| better fitness in captive cuvier's gazelle despite inbreeding increase: evidence of purging? | captive breeding of endangered species often aims at preserving genetic diversity and to avoid the harmful effects of inbreeding. however, deleterious alleles causing inbreeding depression can be purged when inbreeding persists over several generations. despite its great importance both for evolutionary biology and for captive breeding programmes, few studies have addressed whether and to which extent purging may occur. here we undertake a longitudinal study with the largest captive population o ... | 2015 | 26679703 |
| correction: better fitness in captive cuvier's gazelle despite inbreeding increase: evidence of purging? | | 2016 | 27010461 |
| a comparative study of ejaculate traits in three endangered ungulates with different levels of inbreeding: fluctuating asymmetry as an indicator of reproductive and genetic stress. | we studied three closely related species of endangered gazelles (gazella dorcas, gazella dama and gazella cuvieri) with different levels of inbreeding in order to determine at which intensities inbreeding influences ejaculate traits. we also examined whether fluctuating asymmetry (fa) is a reliable indicator of genetic as well as reproductive stress. our results show that, within each population, the individual coefficient of inbreeding is inversely related to ejaculate quality only in the speci ... | 2000 | 10853729 |
| sperm cryopreservation in three species of endangered gazelles (gazella cuvieri, g. dama mhorr, and g. dorcas neglecta). | long-term storage of semen by cryopreservation, with high recovery rates on thawing, is essential for the establishment of genetic resource banks of endangered species. the purpose of the present study was to evaluate various diluents for the cryopreservation of spermatozoa from three species of gazelles (genus gazella) in a captive breeding program. the diluents compared were tes (n-tris(hydroxymethyl)methyl-2 aminoethane sulfonic acid)-tris with 5% egg yolk and 6% glycerol (test) and triladyl, ... | 2003 | 12700201 |
| inbreeding and reproduction in endangered ungulates: preservation of genetic variation through the organization of genetic resource banks. | there is a constant increase in the number of species suffering marked reductions in population size. this reduction in size and the lack of genetic flow may lead to a decrease in genetic variability and to matings between close relatives (i.e. inbreeding) with an ensuing reduction in fitness. it is thus important to understand the mechanism underlying the deleterious effects of inbreeding and to develop reproductive biotechnologies that will allow the reduction of inbreeding depression by facil ... | 2006 | 16984472 |
| effect of egg yolk, cryoprotectant, and various sugars on semen cryopreservation in endangered cuvier's gazelle (gazella cuvieri). | cryopreservation of spermatozoa from endangered species is a valuable tool for genetic management. previous studies showed the feasibility of cryopreservation of spermatozoa from various endangered gazelles but have also revealed difficulties with available protocols for semen freezing in cuvier's gazelle (gazella cuvieri). experiments were carried out to investigate the effect of (a) 5% or 20% egg yolk or 4% or 6% glycerol, and (b) addition of sugars (glucose, fructose, lactose and raffinose) o ... | 2008 | 18024015 |
| paternal levels of dna damage in spermatozoa and maternal parity influence offspring mortality in an endangered ungulate. | understanding which factors influence offspring mortality rates is a major challenge since it influences population dynamics and may constrain the chances of recovery among endangered species. most studies have focused on the effects of maternal and environmental factors, but little is known about paternal factors. among most polygynous mammals, males only contribute the haploid genome to their offspring, but the possibility that sperm dna integrity may influence offspring survival has not been ... | 2010 | 20392732 |
| coxiella burnetii detected in three species of endangered north african gazelles that recently aborted. | coxiella (c.) burnetii is the etiological agent of the zoonotic disease known a q fever. this agent can infect multiple hosts although its pathogenic potential in wild ruminants has been poorly studied. the polymerase chain reaction and the serological test detected the presence of c. burnetii in a population of north african gazelles (n = 355), comprising dorcas gazelle (gazella dorcas neglecta), dama gazelle (nanger dama mhorr) and cuvier's gazelle (gazella cuvieri) which, some of them, they r ... | 2017 | 27771116 |
| data on phylogenetic analyses of gazelles (genus gazella) based on mitochondrial and nuclear intron markers. | the data provided is related to the article "phylogenetic analyses of gazelles reveal repeated transitions of key ecological traits and provide novel insights into the origin of the genus gazella" [1]. the data is based on 48 tissue samples of all nine extant species of the genus gazella, namely gazella gazella, gazella arabica, gazella bennettii, gazella cuvieri, gazella dorcas, gazella leptoceros, gazella marica, gazella spekei, and gazella subgutturosa and four related taxa (saiga tatarica, a ... | 2016 | 27054158 |