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https://www.readbyqxmd.com/read/28432814/do-males-choose-their-mates-in-the-lekking-moth-achroia-grisella-influence-of-female-body-mass-and-male-reproductive-status-on-male-mate-choice
#1
Marlène Goubault, Rebecca Burlaud
Lekking males aggregate to attract females and contribute solely to egg fertilization, without any further parental care. Evolutionary theory therefore predicts them to be non-choosy towards their mates, because any lost mating opportunities would outweigh the benefits associated with such preferences. Nevertheless, due to time costs, the production of energetically costly sexual displays, and potential sperm limitation, the mating effort of lekking males is often considerable. These factors, combined with the fact that many females of varying quality are likely to visit leks, could favor the evolution of male mate preferences...
April 22, 2017: Insect Science
https://www.readbyqxmd.com/read/28431151/dietary-choline-and-phospholipid-supplementation-enhanced-docosahexaenoic-acid-enrichment-in-egg-yolk-of-laying-hens-fed-a-2-schizochytrium-powder-added-diet
#2
H Wang, H J Zhang, X C Wang, S G Wu, J Wang, L Xu, G H Qi
The aim of this study was to evaluate the effect of dietary phospholipid supplementation on laying hen performance, egg quality, and the fatty acid profile of egg yolks from hens fed a 2% Schizochytrium powder diet. Three-hundred-sixty 28-wk-old Hy-line W-36 laying hens were randomly allocated to one of the 5 dietary treatments, each treatment with 6 replicates of 12 birds each. All diets included 2% Schizochytrium powder (docosahexaenoic acid [DHA], 137.09 mg/g). The control group was not supplemented with any additional phospholipids, whereas the other 4 experimental diets were supplemented with 1,000 mg/kg choline (CHO), 1,000 mg/kg monoethanolamine (MEA), 1,000 mg/kg lysophosphatidylcholine (LPC), or 500 mg/kg LPC + 500 mg/kg MEA (LPC + MEA)...
April 20, 2017: Poultry Science
https://www.readbyqxmd.com/read/28431098/egg-production-and-egg-quality-in-free-range-laying-hens-housed-at-different-outdoor-stocking-densities1
#3
D L M Campbell, C Lee, G N Hinch, J R Roberts
Free-range laying hen systems are increasing in number within Australia. Variation in outdoor stocking densities has led to development of a national information standard on free-range egg labeling, including setting a maximum density of 10,000 hens per hectare. However, there are few data on the impacts of differing outdoor densities on production and egg quality. ISA Brown hens in small (150 hens) flocks were housed in identical indoor pens, each with access (from 21 weeks) to different sized ranges simulating one of three outdoor stocking densities (2 replicates each: 2,000 hens/hectare (ha), 10,000 hens/ha, 20,000 hens/ha)...
April 20, 2017: Poultry Science
https://www.readbyqxmd.com/read/28431039/genomic-data-for-78-chickens-from-14-populations
#4
Diyan Li, Tiandong Che, Binlong Chen, Shilin Tian, Xuming Zhou, Guolong Zhang, Miao Li, Uma Gaur, Yan Li, Majing Luo, Long Zhang, Zhongxian Xu, Xiaoling Zhao, Huadong Yin, Yan Wang, Long Jin, Qianzi Tang, Huailiang Xu, Mingyao Yang, Rongjia Zhou, Ruiqiang Li, Qing Zhu, Mingzhou Li
Background: Since the domestication of the red jungle fowls ( Gallus gallus ) (dating back to ∼10,000 B.P.) in Asia, domestic chickens ( Gallus gallus domesticus ) have been subjected to the combined effects of natural selection and human-driven artificial selection; this has resulted in marked phenotypic diversity in a number of traits, including behavior, body composition, egg production and skin color. Population genomic variations through diversifying selection have not been fully investigated...
April 18, 2017: GigaScience
https://www.readbyqxmd.com/read/28428871/does-wintering-north-or-south-of-the-sahara-correlate-with-timing-and-breeding-performance-in-black-tailed-godwits
#5
Rosemarie Kentie, Rocío Marquez-Ferrando, Jordi Figuerola, Laura Gangoso, Jos C E W Hooijmeijer, A H Jelle Loonstra, Frédéric Robin, Mathieu Sarasa, Nathan Senner, Haije Valkema, Mo A Verhoeven, Theunis Piersma
Migrating long distances requires time and energy, and may interact with an individual's performance during breeding. These seasonal interactions in migratory animals are best described in populations with disjunct nonbreeding distributions. The black-tailed godwit (Limosa limosa limosa), which breeds in agricultural grasslands in Western Europe, has such a disjunct nonbreeding distribution: The majority spend the nonbreeding season in West Africa, while a growing number winters north of the Sahara on the Iberian Peninsula...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28427256/effect-of-superdosing-phytase-on-productive-performance-and-egg-quality-in-laying-hens
#6
Jong Hyuk Kim, Franco Martinez Pitargue, Hyunjung Jung, Gi Ppeum Han, Hyeon Seok Choi, Dong Yong Kil
Objective: An experiment was conducted to determine the effect of superdosing phytase on productive performance and egg quality in laying hens. Methods: A total of 200 42-wk-old Hy-Line Brown laying hens were allotted into 1 of 5 dietary treatments with 5 replicates consisting of 8 hens per replicate. The positive control (PC) and negative control diets (NC) were prepared based on the recommended P levels in layer diets. Supplemental phytase was added to the negative control diet at 10,000 (SD10), 20,000 (SD20), or 30,000 (SD30) FTU/kg...
April 21, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28426717/adjusting-cryodiluent-composition-for-improved-post-thaw-quality-of-rabbit-spermatozoa
#7
Sally E Hall, Cameron Negus, Danielle Johinke, Roslyn Bathgate
Improved fertility following artificial insemination with frozen-thawed spermatozoa would offer rabbit producers faster genetic improvement. Previous work investigating cryoprotectants for rabbit spermatozoa have reported inconsistent results. Semen was collected from three rabbit bucks by artificial vagina and frozen using a standard procedure with varied cryodiluent components. Post-thaw analysis encompassed motility, sperm kinematic parameters and acrosome and membrane integrity. Spermatozoa were evaluated at 0, 2 and 4 h after thawing...
2017: PloS One
https://www.readbyqxmd.com/read/28421498/chapter-14-establishing-an-oocyte-cryobank-network
#8
James Graham, Josh Lim, Michael Tucker
Improvements in oocyte cryopreservation has prompted wider acceptance of this technology leading to its use for several reasons. Notably, in addition to elective and medically driven reasons for oocyte cryostorage for fertility preservation, donor oocyte cryobanking is beginning to gain traction, potentially replacing fresh oocyte donation in assisted reproduction. Donor "egg banking," while not totally analogous to donor sperm banking, does provide strong benefits in terms of scheduling flexibility and improved clinical efficiencies, while providing a wider immediate inventory choice...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28420503/age-is-a-major-prognosticator-in-extremely-low-oocyte-retrieval-cycles
#9
Yu-Ting Su, Pin-Yao Lin, Fu-Jen Huang, Fu-Tsai Kung, Yu-Ju Lin, Yi-Ru Tsai, Kuo-Chung Lan
OBJECTIVE: Clinical prognosis appears to be varied in females with poor ovarian response (POR), and poor responders defined by the Bologna criteria might not be sufficiently homogeneous. The aim of this study was to determine the major predictor of reproductive outcomes in extremely low oocyte retrieval cycles. MATERIALS AND METHODS: A cohort of fresh in vitro fertilization/intracytoplasmic sperm injection cycles (n = 858) was analyzed from January 2001 to September 2014...
April 2017: Taiwanese Journal of Obstetrics & Gynecology
https://www.readbyqxmd.com/read/28420423/a-comprehensive-evaluation-of-an-elisa-for-the-diagnosis-of-the-two-most-common-ascarids-in-chickens-using-plasma-or-egg-yolks
#10
Gürbüz Daş, Mark Hennies, Birgit Sohnrey, Shayan Rahimian, Kalyakorn Wongrak, Manuel Stehr, Matthias Gauly
BACKGROUND: Classical faecal egg counts (FEC) provide less reliable diagnostic information for nematode infections in chickens. We developed an ELISA based on Ascaridia galli antigens and tested two hypotheses, as follows: (i) IgY antibodies developed against A. galli will also be useful to identify Heterakis gallinarum infections, and (ii) circulating antibodies stored in egg yolks are as good as plasma samples, so a non-invasive diagnosis is possible. The aim of this study, therefore, was to compare the diagnostic accuracy of the ELISA system with FEC, using both plasma and egg yolks from experimentally infected hens...
April 18, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28416376/seminal-plasma-removal-by-density-gradient-centrifugation-is-superior-for-goat-sperm-preservation-compared-with-classical-sperm-washing
#11
J Santiago-Moreno, M C Esteso, C Castaño, A Toledano-Díaz, J A Delgadillo, A López-Sebastián
Seminal plasma removal is routine in goat sperm cryopreservation protocols. The classical washing procedure designed to accomplish this usually leaves the pellet resulting from use of this procedure contaminated with dead sperm, debris, and cells other than sperm. This contamination negatively affects viability of sperm after cryopreservation. The present research was conducted to compare the effect on chilled and frozen-thawed goat sperm of the classical washing method to that of a selective washing method involving density gradient centrifugation (DGC)...
April 9, 2017: Animal Reproduction Science
https://www.readbyqxmd.com/read/28412990/influence-of-pre-storage-incubation-on-hatchability-traits-thyroid-hormones-antioxidative-status-and-immunity-of-newly-hatched-chicks-at-two-chicken-breeder-flock-ages
#12
T A Ebeid, F A Twfeek, M H Assar, A M Bealish, R E Abd El-Karim, M Ragab
Egg storage longer than 7 days is associated with negative effects on hatchability traits. Pre-storage incubation has been a suggested method to reduce the negative effects of long-term storage times by enhancing the developmental stage of the embryo and probably reducing the embryonic stress. The objective of the present study was to investigate the effects of pre-storage incubation and storage time on hatchability characteristics, chick quality and serum thyroid hormones, antioxidative properties and immunoglobulin Y (IgY) concentrations of newly hatched chicks at two breeder flock ages...
April 17, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28410126/fertilization-failure-and-gamete-health-is-there-a-link
#13
Snehil Budhwar, Vertika Singh, Priyanka Verma, Kiran Singh
Fertilization is a hallmark event of sexual reproduction marked by the fusion of male and female gamete to form zygote. It is a highly complex, yet a robust process that is intricately regulated by various signalling molecules. A healthy fertilization is determined by the quality of zygote which is contingent on the health of egg and sperm. The relationship between infertility and gametic health can be reciprocal. On one hand gametogenesis has to be dynamic and unremitting to sustain the reproductive health, while on the other hand it has to be error free for proper embryonic development...
June 1, 2017: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28407861/influence-of-different-types-of-lamps-on-the-reproductive-development-of-male-japanese-quail-coturnix-coturnix-japonica
#14
Pâmela L Retes, Marcelo Espósito, Danusa G das Neves, Arabela G A Viana, Louise M Coelho, Manuel F Bobadilla-Mendez, Renata R Alvarenga, Edison J Fassani, Juliano V Peixoto, Márcio G Zangeronimo
Reproductive tract development during puberty is critical to reproductive performance, and the light is crucial in this process in birds. However, in male quail, there is little information on the effects of types of lamps, more specifically the wavelength emitted. Thus, the objective was to evaluate the effects of types of lamps on the reproductive performance of male Japanese quail (Coturnix coturnix japonica). Two hundred and forty male quail were exposed to six different types of lamp (incandescent, white fluorescent, or blue, white, red or green LED)...
May 2017: Theriogenology
https://www.readbyqxmd.com/read/28405296/consumptive-and-nonconsumptive-effect-ratios-depend-on-interaction-between-plant-quality-and-hunting-behavior-of-omnivorous-predators
#15
Jörg G Stephan, Johan A Stenberg, Christer Björkman
Predators not only consume prey but exert nonconsumptive effects in form of scaring, consequently disturbing feeding or reproduction. However, how alternative food sources and hunting mode interactively affect consumptive and nonconsumptive effects with implications for prey fitness have not been addressed, impending functional understanding of such tritrophic interactions. With a herbivorous beetle, two omnivorous predatory bugs (plant sap as alternative food, contrasting hunting modes), and four willow genotypes (contrasting suitability for beetle/omnivore), we investigated direct and indirect effects of plant quality on the beetles key reproductive traits (oviposition rate, clutch size)...
April 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28397246/end-product-quality-characteristics-and-consumer-response-of-chickpea-flour-based-gluten-free-muffins-containing-corn-starch-and-egg-white
#16
María Dolores Alvarez, Beatriz Herranz, María José Jiménez, Wenceslao Canet
The objective of this work was to study changes in technological characteristics and sensory properties of gluten-free muffins when using chickpea flour (CF) alone and/or with partial CF replacement by corn starch (CS). The effect of partial whole egg replacement by egg white (EW) was also investigated. Four different CF:CS ratios (100:0, 75:25, 50:50, and 25:75) were used in formulations with and without incorporated EW, and compared with wheat flour (WF) muffins (0:0). Muffins prepared from CF alone had lower hardness, springiness, cohesiveness, chewiness, and resilience than control ones...
March 15, 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/28383518/genetic-architecture-of-bone-quality-variation-in-layer-chickens-revealed-by-a-genome-wide-association-study
#17
Jun Guo, Congjiao Sun, Liang Qu, Manman Shen, Taocun Dou, Meng Ma, Kehua Wang, Ning Yang
Skeletal problems in layer chickens are gaining attention due to animal welfare and economic losses in the egg industry. The genetic improvement of bone traits has been proposed as a potential solution to these issues; however, genetic architecture is not well understood. We conducted a genome-wide association study (GWAS) on bone quality using a sample of 1534 hens genotyped with a 600 K Chicken Genotyping Array. Using a linear mixed model approach, a novel locus close to GSG1L, associated with femur bone mineral density (BMD), was uncovered in this study...
April 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28382878/quality-control-of-telenomus-remus-hymenoptera-platygastridae-reared-on-the-factitious-host-corcyra-cephalonica-lepidoptera-pyralidae-for-successive-generations
#18
A P Queiroz, A de Freitas Bueno, A Pomari-Fernandes, M L M Grande, O C Bortolotto, D M da Silva
Egg parasitoid rearing on factitious hosts is an important step to reduce costs and increase availability of the biocontrol agent but it requires quality control to achieve success in field conditions. To this end, this study evaluated the quality of Telenomus remus (Hymenoptera: Platygastridae) reared on Corcyra cephalonica (Lepidoptera: Pyralidae) for until 45 generations. In the first bioassay, we evaluated the body size of the laboratory-produced parasitoids. In the second bioassay, flight activity was examined, measuring the percentage of 'flyers', 'walkers' and 'deformed' parasitoids...
April 6, 2017: Bulletin of Entomological Research
https://www.readbyqxmd.com/read/28379558/orientation-of-navel-orangeworm-lepidoptera-pyralidae-larvae-and-adults-toward-volatiles-associated-with-almond-hull-split-and-aspergillus-flavus
#19
Daniel S Bush, Allen Lawrance, Joel P Siegel, May R Berenbaum
The navel orangeworm Amyelois transitella (Walker, 1863, Lepidoptera: Pyralidae), a pest of California tree nuts, is associated with the fungus Aspergillus flavus, and previous research suggests these species are facultative mutualists. Because navel orangeworm larvae exhibit improved performance on diets containing this fungus, orientation toward hostplants infected with A. flavus may be adaptive. We conducted behavioral assays to determine if larvae respond to chemical cues produced by almond hull split and fungal infection...
March 31, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28377928/quantitative-pcr-and-digital-pcr-for-detection-of-ascaris-lumbricoides-eggs-in-reclaimed-water
#20
Lucrecia Acosta Soto, Ana Belén Santísima-Trinidad, Fernando Jorge Bornay-Llinares, Marcos Martín González, José Antonio Pascual Valero, Margarita Ros Muñoz
The reuse of reclaimed water from wastewater depuration is a widespread and necessary practice in many areas around the world and must be accompanied by adequate and continuous quality control. Ascaris lumbricoides is one of the soil-transmitted helminths (STH) with risk for humans due to its high infectivity and an important determinant of transmission is the inadequacy of water supplies and sanitation. The World Health Organization (WHO) recommends a limit equal to or lower than one parasitic helminth egg per liter, to reuse reclaimed water for unrestricted irrigation...
2017: BioMed Research International
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