Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

La conservation de la biodiversité et l’impact de l’être humain sur celle-ci est au centre de nos préoccupations depuis quelques années. La génomique est une arme puissante qui, associée à de nombreux domaines, permet des avancées considérables. La compréhension du déclin de certaines espèces sauvages et ses répercussions sur le génome et la reproduction, font l’objet de recherches. Dans ce travail, les principes de l’analyse de la qualité de la semence et les principes de la génomique seront abordés. Par la suite, un lien entre ces deux grands domaines sera établi afin de l’appliquer à la problématique de la conservation animale. En effet, si la consanguinité est bien négativement corrélée avec le succès de la reproduction, les causes et les conséquences exactes régissant ce lien ne sont pas claires. C’est pourquoi, à travers l’hypothèse que le degré d’hétérozygotie influence certains paramètres de qualité du sperme, le lien établi entre consanguinité et reproduction peut potentiellement être décodé. Cette hypothèse sera testée sur quarante-six espèces menacées et cinq espèces de références. Enfin, quatre espèces de canidés seront ensuite prises pour exemple. Les résultats obtenus permettent de confirmer statistiquement le lien entre l’hétérozygotie et le pourcentage de spermatozoïdes normaux mais réfutent le lien entre hétérozygotie et motilité. Dans cette étude, un lien est également établi entre l’hétérozygotie et la concentration en spermatozoïdes de l’éjaculat. Il serait donc nécessaire de poursuivre et approfondir les études avant de pouvoir tirer certaines conclusions. The conservation of biodiversity and the impact of the human being on it has been at the center of our concerns for a few years now. Genomics is a powerful weapon that, combined with many disciplinary fields, allows for significant advances. Understanding the decline of some wildlife species and its implications on the genome and reproduction are being studied. In this work, the principles of semen quality analysis and the principles of genomics will be discussed. Subsequently, a link between these two main areas will be established in order to apply it to the issue of animal conservation. Indeed, if consanguinity is correlated with the success of reproduction, the exact causes and consequences governing this link are unclear. Therefore, assuming that the degree of heterozygosity influences certain sperm quality parameters, the link established between consanguinity and reproduction can potentially be decoded. This hypothesis will be tested on forty-six threatened species and five reference species. Finally, four species of canids will then be taken as an example. The results obtained statistically confirm the link between heterozygosity and the percentage of normal spermatozoa but refute the link between heterozygosity and motility. In this study, a link is also established between heterozygosity and the concentration of spermatozoa in the ejaculate. It would therefore be necessary to continue and deepen the studies before drawing certain conclusions.

semen quality --- heterozygosity --- wildlife conservation --- Sciences du vivant > Médecine vétérinaire & santé animale

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Rabbit livestock is especially important in the Mediterranean area and in the semi-arid zones of Africa, Asia, and America, representing a valuable alternative source of good animal protein of high quality (low fat and low cholesterol). However, rabbit husbandry should adapt to be a competitive and sustainable sector. In addition, it must maintain a balance between rabbit welfare, customer demands, and breeder requirements. Then, improvement in breeding systems is needed and may involve avoiding hormones and antibiotics in rabbit management; enhancing the efficiency of reproductive procedures such as artificial insemination systems and freezing of semen and embryos; extending the productive lifespan of does; improving genetic selection systems; and adjusting nutritional systems to optimize the physiological status of animals and the immune response. This Special Issue concerns all these challenges in increasing rabbit productivity and sustainability.

Research & information: general --- Biology, life sciences --- Animals & society --- Oryctolagus cuniculus --- SNPs --- SLAF-seq --- genome-wide association study --- growth trait --- myeloperoxidase --- lysozyme --- rabbits --- viral infection --- rabbit hemorrhagic disease --- goji berries --- rabbit --- insulin resistance --- leptin --- non-esterified fatty acids --- pregnancy --- lactation --- body condition score --- principal component analysis --- gene expression --- endometrium --- oviduct --- spermatozoa --- seminal plasma --- inflammation --- angiogenesis --- corpus luteum --- reproduction --- genomic selection --- imputation --- litter size --- genomic simulation --- artificial insemination --- antibiotics --- antibacterial activity --- semen quality --- reproductive performance --- sperm quality --- cryopreservation --- animal model --- assisted reproductive technology --- CTSS --- granulosa cells --- proliferation --- apoptosis --- hormone secretion --- body composition --- fertility --- kits born alive --- rabbit does --- feed intake --- free tri-iodothyronine --- thyroxine --- insulin --- glucose --- corticosterone --- NEFA --- fetus --- placenta

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Rabbit livestock is especially important in the Mediterranean area and in the semi-arid zones of Africa, Asia, and America, representing a valuable alternative source of good animal protein of high quality (low fat and low cholesterol). However, rabbit husbandry should adapt to be a competitive and sustainable sector. In addition, it must maintain a balance between rabbit welfare, customer demands, and breeder requirements. Then, improvement in breeding systems is needed and may involve avoiding hormones and antibiotics in rabbit management; enhancing the efficiency of reproductive procedures such as artificial insemination systems and freezing of semen and embryos; extending the productive lifespan of does; improving genetic selection systems; and adjusting nutritional systems to optimize the physiological status of animals and the immune response. This Special Issue concerns all these challenges in increasing rabbit productivity and sustainability.

Research & information: general --- Biology, life sciences --- Animals & society --- Oryctolagus cuniculus --- SNPs --- SLAF-seq --- genome-wide association study --- growth trait --- myeloperoxidase --- lysozyme --- rabbits --- viral infection --- rabbit hemorrhagic disease --- goji berries --- rabbit --- insulin resistance --- leptin --- non-esterified fatty acids --- pregnancy --- lactation --- body condition score --- principal component analysis --- gene expression --- endometrium --- oviduct --- spermatozoa --- seminal plasma --- inflammation --- angiogenesis --- corpus luteum --- reproduction --- genomic selection --- imputation --- litter size --- genomic simulation --- artificial insemination --- antibiotics --- antibacterial activity --- semen quality --- reproductive performance --- sperm quality --- cryopreservation --- animal model --- assisted reproductive technology --- CTSS --- granulosa cells --- proliferation --- apoptosis --- hormone secretion --- body composition --- fertility --- kits born alive --- rabbit does --- feed intake --- free tri-iodothyronine --- thyroxine --- insulin --- glucose --- corticosterone --- NEFA --- fetus --- placenta

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Nowadays, assisted reproductive technologies (ARTs) have a pivotal role not only in achieving fertilization in subfertile animals, but they are also involved in the management of the herd, decreasing disease spread and even allowing offspring sex selection. Nonetheless, there are differences between species or even within species that have led researchers worldwide to focus on those differences in order to bypass these specific difficulties. This Special Issue, titled “The Era of Assisted Reproductive Technologies Tailored to the Specific Necessities of Species, Industry and Case Reports” and published in Animals, is composed of 12 original manuscripts and three reviews that offer an overview of current and future ARTs used to improve reproductive outcomes, mainly focused on farm animals, such as horse, pig, bovine, rabbit and ovine species. Thus, the Special Issue covers information from the classical point of view, including comparative studies of different semen extenders, to the most advanced technologies of sperm selection by thermotaxis or chemoattractants, as well as the improvement of sperm features by red light irradiation. The female and embryo contributions to ART outcomes are also covered, for instance, with a study that improves our knowledge by the metabolomic description of follicular fluid composition or the description of better culture conditions of oocytes. In brief, this Special Issue provides a balanced overview of emerging techniques and technologies used to preserve, improve, rescue or even create fertility for domestic farm animals with high economic impact.

Medicine --- IVM --- oocytes --- equine --- metabolomic --- embryo transfer --- reproductive fluids --- pregnancy --- vitrification --- calving --- selection programme --- embryo vitrification --- Gompertz growth curve --- biobanking --- reproductive performance --- stallion sperm --- capacitation --- penicillamine --- thermotaxis --- selection --- BMP15 --- ram --- semen --- semen freezing --- semen extender --- stallions --- semen quality --- fertilizing ability --- Tris --- boar spermatozoa --- perfluorinated compounds --- PFHxS --- PFOS --- spermatozoa toxicology --- glucocorticoid receptor --- gene expression --- RT-qPCR --- seminal plasma --- female genital tract --- rabbit --- spermatozoa --- oocyte --- in vitro fertilization --- extracellular vesicles --- assisted reproductive technologies --- embryo --- oocyte competence --- livestock production --- assisted reproductive technology --- embryo development --- micromanipulation --- in vitro production --- nanoparticles --- liposomes --- exosomes --- cryopreservation --- sheep --- ovary storage --- transport --- in vitro embryo production --- sperm selection --- chemotaxis --- IVF --- IVC --- porcine --- cryopreserved sperm --- sperm–oviduct interaction --- ARTs --- equines --- horse --- sperm --- red light irradiation --- extender --- straw