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Animal Reproduction Science

Seval Bahadir Koca, Omer Ongun, Ozlem Ozmen, Nalan Ozgur Yigit
This study was conducted to determine the effect of turmeric powder dietary supplementation on the histology of visceral organs and reproductive performance of Pseudotropheus acei. The fish were fed dietary additions of 0%, 1%, 3%, 5%, and 7% turmeric powder. Each treatment was replicated three times. There were one male and four female fish with a mean weight of 6 g in each replicate. The fish were fed ad libitum for 90 days. There were no differences in fertility rate, fecundity rate, hatching rate, egg diameter, and larvae survival rate among groups (P < 0...
January 9, 2019: Animal Reproduction Science
Hawar M Zebari, S Mark Rutter, Emma C L Bleach
Large percentages of dairy cows do not express behavioural signs of oestrus. Faecal and urine fatty acid concentrations increase during oestrus. The objective of the present study was to determine the milk FA profile of dairy cows during the oestrous and dioestrous periods and the relationship with behavioural signs on the day of oestrus. The activity of 32 Holstein Friesian cows was measured continuously using GEA Rescounter ll pedometers (GEA Farm Technologies, Düsseldorf, Germany) and IceQubes (IceRobotics Ltd...
January 9, 2019: Animal Reproduction Science
Dariusz Kucharczyk, Joanna Nowosad, Daria Joanna Kucharczyk, Krzysztof Kupren, Katarzyna Targońska, Elżbieta Wyszomirska, Roman Kujawa
This study focused on the artificial reproduction of common dace Leuciscus leuciscus (L.) outside the reproductive season. The results indicate there is the possibility of initiating the reproducion in individuals of this before the natural spawning season. There could be induction of spermiation by altering the environmental conditions. For females, hormonal injections were necessary for induction of final oocyte maturation and ovulation. Generally, there were high percentages of spermiation (100%) and ovulation (87%-100%) as well as low mortality (0%-11% and 7%-13% for males and females, respectively) among the induced spawners...
January 8, 2019: Animal Reproduction Science
Haizhen Wu, Fangtao Fan, Caizhi Liang, Yan Zhou, Xibo Qiao, Y Sun, Yunliang Jiang, Li Kang
MicroRNAs (miRNAs) are a class of endogenous non-coding RNAs that have an important role in post-transcriptional regulation. Previous analysis of the chicken ovary transcriptome indicated there was a differential abundance of miR-26a-5p in sexually mature and immature hens. In this study, ten single nucleotide polymorphism (SNP) sites in miR-26a-5p primary transcripts (pri-miR-26a-5p) were identified using Sanger sequencing on PCR products in three chicken breeds, among which, the rs316365438(C > T)SNP was associated with age at first egg (AFE) and total number of eggs at 32 weeks (E32)...
January 3, 2019: Animal Reproduction Science
Giovano Neumann, Paulo Vanderlei Sanches, Robie Allan Bombardelli
The aim in the present study was to evaluate the effects of motile sperm:oocyte ratio and the use of thawed spermatozoa at different post-activation times in artificial reproduction of gray catfish (Rhamdia quelen). Cryopreserved sperm samples were evaluated for sperm motility and velocity using Computer Assisted Sperm Analysis (CASA). The sperm activation curves were generated using a non-linear statistical model and were used to assess the spermatozoa velocity after thawing. Thus, the oocytes were mixed with thawed sperm at a motile sperm:oocyte ratio of 70,000, 90,000, 110,000, 130,000, 150,000 and 170,000...
January 3, 2019: Animal Reproduction Science
Favián Treulen, Luis Aguila, María Elena Arias, Ignacio Jofré, Ricardo Felmer
During cryopreservation procedures, the spermatozoa are exposed to physical and chemical stressors that generate an increase in the intracellular concentration of reactive oxygen species (ROS). If ROS concentrations are too great, this can lead to a state of oxidative stress that are detrimental to sperm quality. The aim of this study was to ascertain the profile the ROS production and assess the effects of post-thaw supplementation of a semen extender with different antioxidant compounds on the quality and function variables of frozen-thawed stallion spermatozoa incubated in vitro...
December 20, 2018: Animal Reproduction Science
Xue Liu, KeYi Ma, ZhiQiang Liu, JianBin Feng, BaoQing Ye, GaoFeng Qiu
Neuropeptides, important messenger molecules, regulate various physiological processes, such as growth, development, and reproduction. In the present study, cDNA libraries from brains of E. sinensis were constructed and sequenced using the Illumina technique for transcript analysis and neuropeptides discovery. There were 233,887 transcripts assembled for 194,286 unigenes. According to the annotations of NCBI non-redundant protein (NR) database, 2487 (11.31%) unigenes were annotated successfully. In total, 1273 transcripts were assigned to the "signal transduction mechanisms" category using KOG analysis...
December 18, 2018: Animal Reproduction Science
Luiz Francisco Machado Pfeifer, Jair Sábio Oliveira Júnior, José Roberto Potiens
The objectives of this study were to evaluate whether the diameter of the preovulatory follicle and the post-thaw sperm kinematics are factors that affect successful establishment of a pregnancy after timed AI (TAI) of postpartum beef cows. Nelore cows (n = 346) were subjected to an estradiol-progesterone based TAI protocol. At TAI, cows were categorized according to the diameter of the preovulatory follicle (POF) in the Early Ovulation (EO group, n = 184), and Late Ovulation (LO group, n = 162) groups...
December 18, 2018: Animal Reproduction Science
Sara El Kadili, Marianne Raes, Jean-Loup Bister, Bouchaib Archa, Mouad Chentouf, Nathalie Kirschvink
Changes in anatomical, behavioural and seminal characteristics were measured throughout the year in seven Beni Arouss bucks maintained at a latitude of 35 °N. Testicular size varied significantly. There were the greatest values during the summer and autumn for scrotal circumference and least in the winter for testicular length. Values for most variables related to sexual behavior were not affected by season except the number of mounts before first ejaculation which was least in the summer. No differences were detected between seasons in terms of semen volume...
December 15, 2018: Animal Reproduction Science
Abouzar Najafi, Hossein Daghigh Kia, Hamed Hamishehkar, Gholamali Moghaddam, Sadeg Alijani
The objective of this study was to assess the effect of resveratrol and resveratrol-loaded nanostructured lipid carriers (NLC) supplementation of semen extender on values for fertility variables of cryopreserved rooster semen. Rooster semen was cryopreserved in modified Beltsville extender containing 0 (control group), resveratrol at 20, 40 and 60 μM and resveratrol-loaded NLC at 20, 40 and 60 μM. After thawing, motility properties, abnormal morphology, viability, membrane functionality, mitochondrial activity, apoptotic status, malondialdehyde (MDA) and antioxidant activities (glutathione peroxidase (GPx), superoxide dismutase (SOD), and total antioxidant capacity (TAC)) and fertility potential (fertility and hatchability rates) were assessed...
December 15, 2018: Animal Reproduction Science
Carolina Rodriguez Jimenez, Débora Botéquio Moretti, Patricia Spoto Corrêa, Ricardo Lopes Dias da Costa, Tsai Siu Mui, Raul Machado-Neto, Helder Louvandini
Manipulation of oocytes enclosed in preantral follicles (MOEPF) allows for analyzing follicular development and use of this biotechnology in the pre-analysis of the beneficial or toxic effects of bio-products on granulosa cells and oocytes at different developmental stages. In this study, there was evaluation of the effects of gossypol by culturing granulosa cells and oocytes in ewe ovarian tissues. Ovarian tissues were cultured with gossypol at 37 °C, in humidified air and 5% CO2 . Variables that were evaluated were morphology, morphometry, ultrastructure and abundance of estradiol receptor α (α-ER)...
December 12, 2018: Animal Reproduction Science
Sarah C Tenley, Renata Spuri Gomes, Shelby L Rosasco, Emmalee J Northrop, Jerica J J Rich, Anthony K McNeel, Adam F Summers, Jeremy R Miles, Chadwick C Chase, Clay A Lents, George A Perry, Jennifer R Wood, Andrea S Cupp, Robert A Cushman
The number of antral follicles detectable by ultrasonography in heifers is influenced by age of the dam, because daughters of primiparous cows have fewer antral follicles than daughters of mature cows. We, therefore, hypothesized that heifers with primiparous dams would have fewer primordial follicles in their ovaries than heifers born to mature (4+ y) cows. Angus heifers (n = 464) were submitted for ultrasonographic evaluation of antral follicle number at 325, 355, and 385 d of age. Ovaries were collected from a random subset of heifers (n = 79) and processed for histological evaluation to determine number of primordial follicles...
December 12, 2018: Animal Reproduction Science
Cecília Constantino Rocha, Thiago Martins, Beatriz Oliveira Cardoso, Luciano Andrade Silva, Mario Binelli, Guilherme Pugliesi
The aim was to evaluate the associations between circulating P4 concentrations, corpus luteum (CL) size (diameter, area or volume) and blood perfusion (BP) in cows. In Experiment 1, Pearson's correlations (P < 0.05) with P4 concentrations were observed during CL development (D8) for total area (TA; r = 0.76), luteal area (ACL; r = 0.72), total and luteal diameter (TD and DCL respectively; r = 0.46). During mid-late diestrus, there was a positive correlation (P < 0.05) only at D15 with TA and ACL (r > 0...
December 11, 2018: Animal Reproduction Science
Ping Li, Hao Du, Xin Mei Qiao, Zhi Gang Liu, Qiong Zhou, Qi Wei Wei
Knowledge of conditions affecting sperm quality is essential for efficient culture of fish for commercial purposes and conservation of species. Two-dimensional gel electrophoresis and matrix-assisted laser desorption/ionization time of flight mass spectrometry were used to characterize the proteomic profile of Acipenser dabryanus spermatozoa relative to motility and fertilization capacity. There were differential amounts of protein in 313 spots in spermatozoa of males classified to have relatively greater or lesser spermatozoa quality...
December 6, 2018: Animal Reproduction Science
M F Gallelli, C Bianchi, D Lombardo, F Rey, F M Rodriguez, V A Castillo, M Miragaya
Folliculogenesis and ovulation are regulated by gonadotrophins and other factors such as Insulin like growth factor 1 (IGF1) and leptin. In various species the presence of IGF1 receptor (IGF1R) and leptin receptor (ObR) has been detected in the ovary, but not in the alpaca. Thus, the aim of the present study was to evaluate the presence of these receptors in this tissue and analyze if the presence of these receptors in the ovary is related to the presence of a corpus luteum (CL) and if abundances, as determined by immunostaining intensity vary with follicle size...
December 6, 2018: Animal Reproduction Science
Maria Consuelo Mura, Sebastiano Luridiana, Luisa Pulinas, Maria Veronica Di Stefano, Vincenzo Carcangiu
The aims were to evaluate the reproductive response to ram placement with Sarda ewes with different allelic variants at position g.15099485 A > G of the MTNR1 A gene. Ram placements occurred between the early and late spring and there was analysis of whether this polymorphism is associated with other nucleotide substitutions. In each of the eight farms where the study was conducted (named F1-F8), 150 ewes (50 with A/A, A/G and G/G genotypes) were selected. In each group of 150 ewes, eight males were joined with ewes on the following dates: 25 March (T1) for F1-F2, 15 April (T2) for F3-F4, 5 May (T3) for F5-F6, and 1 June (T4) for F7-F8...
November 28, 2018: Animal Reproduction Science
J Santiago-Moreno, C Castaño, A Toledano-Díaz, M C Esteso, E Martínez-Nevado, J Gimeno-Martínez, A López-Goya
In this study, there was an examination of the effect on the characteristics of cryopreserved black-footed (Spheniscus demersus) and gentoo (Pygoscelis papua) penguin semen, of thawing at 37 and 5 °C. For two consecutive years, semen was collected and frozen during the April-June period from six gentoo penguins, and during the October-November period from 13 black-footed penguins. After thawing, sperm motility variables were examined by computer-assisted sperm analysis. Propidium iodide and SYBR-14 were used as fluorochromes for the examination of membrane integrity...
November 26, 2018: Animal Reproduction Science
Kamil Dobrzyn, Karol Szeszko, Marta Kiezun, Katarzyna Kisielewska, Edyta Rytelewska, Marlena Gudelska, Joanna Wyrebek, Kinga Bors, Tadeusz Kaminski, Nina Smolinska
Orexin A belongs to the group of hypothalamic-derived peptides that are involved in a number of processes, such as regulation of energy metabolism, control of food intake and regulation of the reproductive system, by influencing the hypothalamic-pituitary-ovarian axis. Orexin A is also present in the endometrium, myometrium and placenta, which indicates that it may function as an important local regulator of the reproductive functions. The aim of this study was to explore the effects of orexin A on global gene expression in the endometrium of pigs during early gestation, on days 15 to 16 of pregnancy (implantation period)...
November 20, 2018: Animal Reproduction Science
Yuan Shen, Shuang Feng, Bo Liu, Wei Mao, Ruifeng Gao, Jindi Wu, Yang Deng, Long Gao, Shuangyi Zhang, Qianru Li, Jinshan Cao
Bacterial contamination often impairs uterine function in cattle leading to uterine diseases such as endometritis. Inflammatory responses to bacterial infections in the uterus of cattle are generated through pattern recognition receptors, including Toll-like receptor 2 (TLR2), which is responsible for Pam3CSK4 recognition. This cellular response induces inflammatory responses through stimulation of mitogen-activated protein kinases (MAPKs) and nuclear factor (NF)-κB signaling activation, stimulating the expression of inflammatory mediators...
November 20, 2018: Animal Reproduction Science
Julia Giriboni, Özdal Gökdal, Vadullah Eren, Engin Yaralı, Julián Santiago-Moreno, Rodolfo Ungerfeld
The aim of this study was to determine if daily administration of a GnRH analogue (buserelin acetate) to bucks during the non-breeding season increases testosterone concentration and improves sperm quality. Five bucks received a daily dose of buserelin for 10 days, starting on Day 0 (first administration), and another five bucks remained as controls. Testosterone concentrations were greater in treated than in control bucks during the first hours after buserelin administration (P = 0.05), but greater in controls 10 h later (P < 0...
November 19, 2018: Animal Reproduction Science
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