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Animal Reproduction Science

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https://www.readbyqxmd.com/read/28811063/sperm-quality-variables-as-indicators-of-bull-fertility-may-be-breed-dependent
#1
Jane M Morrell, Thanapol Nongbua, Sabina Valeanu, Isabel Lima Verde, Katrin Lundstedt-Enkel, Anders Edman, Anders Johannisson
A means of discriminating among bulls of high fertility based on sperm quality is needed by breeding centers. The objective of the study was to examine parameters of sperm quality in bulls of known fertility to identify useful indicators of fertility. Frozen semen was available from bulls of known fertility (Viking Genetics, Skara, Sweden): Swedish Red (n=31), Holstein (n=25) and Others (one each of Charolais, Limousin, Blonde, SKB). After thawing, the sperm samples were analyzed for motility (computer assisted sperm analysis), plasma membrane integrity, chromatin integrity, acrosome status, mitochondrial activity and reactive oxygen species...
August 7, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28784317/comparison-of-visual-and-computerized-estrous-detection-and-evaluation-of-influencing-factors
#2
Ina Gaude, Andreas Kempf, Klaas Dietrich Strüve, Martina Hoedemaker
The aim of this study was to compare the automatic estrous detection system (AED) Heatime(®) with visual estrous detection (VED). The study was conducted on 139 Holstein Friesian cows in one dairy herd in Northern Germany. The cows were fitted with activity collars from d 21 postpartum until d 40 of gestation and a 30-min visual estrous observation was conducted three times a day. In addition, as a separate part of the VED, estrous detection by exclusive consideration of standing estrus (SE) was investigated...
July 29, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28779946/fertility-disturbances-of-dimethylacetamide-and-glycerol-in-rooster-sperm-diluents-discrimination-among-effects-produced-pre-and-post-freezing-thawing-process
#3
F M K Abouelezz, M A M Sayed, J Santiago-Moreno
With avian sperm cryopreservation protocols, the most widely used cryoprotectants (CPAs) are the glycerol (GLY; in gradual freezing: in-straw freezing method), and the dimethylacetamide (DMA; in pellets by plunging into liquid nitrogen: in-pellet rapid freezing method). Use of both methods results in a small portion of thawed live sperm with lesser fertilizing ability compared with the semen samples immediately after collection. This study was conducted to assess the pre-freezing damage occurring to the sperm due to the interaction with the cryoprotectants (CPAs) GLY (8%) and DMA (5%), as well as the post-freezing damage resulting from both freezing methods Data for each treatment, in fresh and frozen-thawed samples, were compared for sperm motility, fertilizing capacity and sperm-egg penetration holes/germinal disc (SP holes/GD)...
July 29, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28778622/integrity-of-head-and-tail-plasmalemma-is-associated-with-different-kinetic-variables-in-boar-sperm
#4
Adéla Grieblová, Eliana Pintus, José Luis Ros-Santaella
An intact and functional sperm plasmalemma has a major role in sperm motility and fertilizing capacity. Several techniques have been developed to evaluate the integrity of the sperm plasma membrane, but there are still some inconsistencies concerning the methods that are more closely associated with sperm function. In this study, the aim was to: i) evaluate the integrity of the boar sperm plasmalemma during 72h of semen storage at 17°C using four techniques: eosin/nigrosin (E/N), propidium iodide/carboxyfluorescein diacetate (PI/CFDA), hypo-osmotic swelling test (HOST), and combined HOST with eosin staining (HOST/E), ii) assess the correlations and the limits of consistency among these techniques, iii) and estimate the relationships with the acrosomal status and sperm kinetics...
July 29, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28781155/hyaluronic-acid-improves-frozen-thawed-sperm-quality-and-fertility-potential-in-rooster
#5
Saied Lotfi, Morteza Mehri, Mohsen Sharafi, Reza Masoudi
Beneficial effects of Hyaluronic acid (HA) has not been yet assessed for cryopreservation of rooster sperm. This study was conducted to evaluate the effects of different concentrations of HA (0, 1, 2, 4 and 8mM) in Beltsville extender on the cryopreservation of rooster sperm. Semen samples were collected from six Ross broiler breeders (24-week) using abdominal massage, then divided into five equal aliquots and cryopreserved in Beltsville extender that contained different concentrations of HA. Motion characteristics, morphology, membrane functionality, viability, acrosome integrity, lipid peroxidation and fertility potential of sperm were assessed after thawing...
July 25, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28765035/effects-of-adding-different-levels-of-glutamine-to-modified-beltsville-extender-on-the-survival-of-frozen-rooster-semen
#6
Aytak Bakhshayesh Khiabani, Gholamali Moghaddam, Hossein Daghigh Kia
The aim of the present study was to investigate the effects of l-glutamine on the quality of frozen-thawed rooster semen. Semen samples were collected from eight mature roosters (Ross 308). After initial semen assessments, samples of adequate quality were mixed together and diluted with modified Beltsville extender without l-glutamine (control) and supplemented with 2.5, 5, and 7.5mM l-glutamine. Semen straws were subjected to cryopreservation and evaluated twice at 15-day intervals. After thawing, sperm viability, total and progressive sperm motilities were measured by Eosin-Nigrosine and Computer-Aided Sperm Analysis (CASA), respectively...
July 25, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28765033/assessment-of-butorphanol-azaperone-medetomidine-combination-as-anesthesia-for-semen-collection-and-evaluation-of-semen-quality-in-white-tailed-deer-odocoileus-virginianus
#7
S M Kirschner, R Rodenkirch
The aim of this current study was to evaluate the level of anesthesia produced by a combination of butorphanol-azaperone-medetomidine (BAM) for semen collection by electroejaculation on captive white-tailed bucks (Odocoileus virginianus). Ten male white-tailed deer, weighing 68.2-115.9kg, ranging in age from one to four years were randomly selected from housing pens and anesthetized with the BAM drug combination at a dose volume of 2.0mL each. Semen was collected from each animal using a standard cervid electroejaculation protocol while under BAM anesthesia...
July 25, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28760664/effect-of-11%C3%AE-hydroxyandrostenedione-on-european-whitefish-coregonus-lavaretus-linnaeus-1758
#8
Jarosław Król, Piotr Hliwa, Adam Polewacz, Agnieszka Stabińska, Stefan Dobosz, Konrad Ocalewicz
The goal of the present research was to evaluate the efficiency of 11β-hydroxyandrostenedione (OHA) applied in the diet to achieve sex reversal in the European whitefish (Coregonus lavaretus). At 32day post-hatching, fish were reared in four groups: fish fed with 10ppm of OHA (10 OHA), fish fed with 20ppm of OHA (20 OHA), fish fed without OHA (C) and fish fed without OHA and reared in the water from 20 OHA group (R). The experimental groups were conducted in separate recirculation systems and the first phase of the experiment lasted 63days...
July 25, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28789824/apoptosis-and-cell-proliferation-in-porcine-placental-vascularization
#9
Eva G Sanchis, Andrea L Cristofolini, Mariana R Fiorimanti, Claudio G Barbeito, Cecilia I Merkis
The placenta is a highly vascularized organ, indispensable tothe transfer of nutrients to the growing fetuses. During gestation, there exists an expansion of the placental vascular network through active angiogenesis. The aim of this research was to study cell proliferation and apoptosis through high resolution light microscopy (HRLM) and transmission electron microscopy (TEM) ultrastructure, immunohistochemistry for Ki67and caspase-3, determination of placental vascular area,and TUNEL assay. Crossbred sows placental tissues from approximately 30±2(n=5), 40±2(n=5), 60±2 (n=5), 80±2(n=5), 90±2(n=5) and 114±2(n=5) days of gestation were used...
July 23, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28765034/semen-quality-antioxidant-status-and-reproductive-performance-of-rabbits-bucks-fed-milk-thistle-seeds-and-rosemary-leaves
#10
Youssef A Attia, Rawia S Hamed, Fulvia Bovera, Abd El-Hamid E Abd El-Hamid, Mohammed A Al-Harthi, Hossam A Shahba
The study aimed to investigate the effects of milk thistle seeds (MTS) and rosemary leaves (RL) both at 5 and 10g/kg diet on reproductive performance, semen quality and blood metabolites of rabbit bucks. A total of 35 rabbit bucks were randomly distributed into five experimental groups (7 bucks/group). All the groups were fed the same basal diet. The 1st group (control) did not have MTS and RL in its basal diet. The 2nd and 3rd groups were supplemented with MTS at 5 and 10g/kg, respectively. The 4th and 5th groups were fed the basal diet supplemented with RL at 5 and 10g/kg, respectively...
July 23, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28760665/metritis-vaccination-in-holstein-dairy-heifers-using-a-herd-specific-multivalent-vaccine-effects-on-uterine-health-and-fertility-in-first-lactation
#11
M Freick, A Kunze, O Passarge, J Weber, S Geidel
In cattle, acute puerperal metritis (APM) compromises animal welfare and has an economic impact to the farmer because of the detrimental effects on reproductive performance, milk production, and survivability. The aim of this randomized clinical study was to investigate the effects of a prepartum immunization using a herd-specific multivalent vaccine on incidence of APM, prevalence of clinical endometritis (CE), and selected measures of reproductive performance in primiparous Holstein cows. Pregnant nulliparous cows (230±4days of gestation) assigned to the vaccinated group (VG; n=142) received subcutaneously 5...
July 22, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28750938/impact-of-cryopreservation-method-on-dromedary-camel-ovary-structure-viability-and-development-of-antral-follicular-oocytes
#12
M M Madboly, E S Abdel-Aal, Eitedal H Elsayed
The objectives of this study were, a) to compare two different vitrification techniques, the solid surface vitrification (SSV) and direct vitrification (DV) method, b) to evaluate the effect of four cryoprotectant agents and their toxicity on the morphological appearance and ultrastructural of camel ovarian cortex, c) to examine the development of oocytes recovered from the vitrified ovarian cortex. Fragments of ovarian cortex were exposed to equilibration solution consisting of TCM- 199 with 10% fetal camel serum (FCS); 0...
July 19, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28735886/effects-of-dietary-propolis-on-the-number-and-size-of-pleopadal-egg-oxidative-stress-and-antioxidant-status-of-freshwater-crayfish-astacus-leptodactylus-eschscholtz
#13
Serpil Mişe Yonar, Kenan Köprücü, Muhammet Enis Yonar, Sibel Silici
Four different crayfish diets; control, E1, E2 and E3, respectively containing 0, 1, 2 and 4% propolis, were tested to determine the effects of dietary propolis on the number and size of pleopadal egg, and malondialdehyde (MDA) level, superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) activities in the freshwater crayfish (Astacus leptodactylus). The crayfish were kept at 9.6±5.3°C water temperature and fed three times daily during a six month period The pleopodal egg number (from 7 to 9) produced per gram of the body weight and total pleopodal egg number (from 201 to 263) significantly increased (P<0...
July 19, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28735887/effect-of-pyrethroids-on-female-genital-system-review
#14
REVIEW
Elena Marettova, Milan Maretta, Jaroslav Legáth
Pyrethroids have been associated with a range of toxicological effects on various organs in animals.Recent animal studies suggest that neurodevelopmental, reproductive, and immunological effects may result following exposure to some pyrethroids at levels below those that induce overt signs of neurotoxicity. A variety of pyrethroids and their metabolites have the potential to affect the reproductive system. Dose-dependent effects on reproduction are associated with exposure across pyrethroid types. In mammals, permethrin and tetramethrin and cypermethrin have been found to be associated with adverse effects at high doses...
July 16, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28735888/differential-expression-of-subunits-of-20%C3%AE-hydroxysteroid-dehydrogenase-during-gametogenesis-in-rainbow-trout-oncorhychus-mykiss
#15
Arya Vazirzadeh, Yann Guiguen
The patterns of expression of two subunits of 20β-hydroxysteroid dehydrogenase (20β-HSD), key enzyme involved in the biosynthesis and activation of steroid hormones, were examined in rainbow trout by using a combination of quantitative real-time PCR and in-situ hybridization. The expression of targeted genes was examined in mRNA extracted from different tissues at different gonadal stages in male and female trout. Both subunits of 20β-HSD were found to be widely distributed in tissues. The highest expression of 20β-HSD A was found in intestine followed by skin, stomach, liver and gills, whereas, the highest expression of 20β-HSD B was observed in stomach followed by head kidney, ovary - at late vitellogenesis stage- and trunk kidney...
July 14, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28732668/spermatogenesis-in-a-neotropical-marsupial-species-philander-frenatus-olfers-1818
#16
A F A Figueiredo, D A Cordeiro, J C Nogueira, S A Talamoni, L R França, G M J Costa
Despite the singular morphology of the male genital system and the different reproductive strategies of marsupials, little emphasis has been given to the testis morphology and spermatogenic kinetics in this mammalian order. The present study aimed to investigate the testis function and the duration of spermatogenesis in the southeastern four-eyed opossum, Philander frenatus. Testes of six adult males were routinely processed for histological and stereological analyses. In order to determine the duration of spermatogenesis, intratesticular injections of tritiated thymidine were performed 1h, 13days and 21days before the sacrifice...
July 13, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28732669/clinical-use-of-fetal-measurements-to-determine-the-whelping-day-in-german-shepherd-breed-bitches
#17
Marta Cecchetto, Chiara Milani, Juri Vencato, Hasan Sontas, Antonio Mollo, Barbara Contiero, Stefano Romagnoli
The aim of this work was to use a linear regression model previously developed in a pilot study to calculate days before parturition (DbP) using inner chorionic cavity (ICC), biparietal diameter (BPD), crown-rump length (CRL), body diameter (BD) and deep portion of telencephalic vesicle (DPTV) in German shepherd dogs (GSD) with known ovulation day and then to test that model in bitches with unknown ovulation day. In our current study, a model for GSD bitches published in a previous report, proved satisfactory for ICC [DbP=44...
July 12, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28705425/corrigendum-to-reproductive-cycles-of-marine-mammals-anim-reprod-sci-124-2011-184-193
#18
P Pomeroy
No abstract text is available yet for this article.
July 10, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28720311/evaluation-of-changes-in-blood-flow-of-the-uterine-artery-by-doppler-ultrasonography-during-the-estrous-cycle-in-lactating-bos-indicus-cows
#19
Mubbashar Hassan, Abdul Sattar, Muhammad Bilal, Muhammad Avais, Nasim Ahmad
The objective of this study was to evaluate the changes in uterine blood flow (UBF) based on the resistance index (RI) and the pulsatility index (PI) by Doppler ultrasonography throughout the estrous cycle in lactating Sahiwal cows (n=9). Cows were randomly selected during their spontaneous estrus. UBF was examined on alternate days in all cows during the estrous cycle. The results revealed that the mean RI values were higher (P<0.05) on day -1 (estrus) than on day 0 (ovulation). The mean RI values followed a consistent pattern on days 2, 4, 6, and 8 (metestrus to early diestrus) and were lower (P<0...
July 9, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28709735/genetic-variation-and-correlated-changes-in-reproductive-performance-of-a-red-tilapia-line-selected-for-improved-growth-over-three-generations
#20
Ngo Phu Thoa, Azhar Hamzah, Nguyen Hong Nguyen
The present study examines genetic variation and correlated changes in reproductive performance traits in a red tilapia (Oreochromis spp.) population selected over three generations for improved growth. A total of 328 breeding females (offspring of 111 sires and 118 dams) had measurements of body weight prior to spawning (WBS), number of fry at hatching (NFH), total fry weight (TFW) and number of dead fry (NDF) or mortality of fry including unhatched eggs at hatching (MFH). Restricted maximum likelihood (REML) analysis in a multi-trait model showed that there are heritable genetic components for all traits studied...
July 6, 2017: Animal Reproduction Science
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