Occurrence of twin embryos in the eastern bluebird

Bailey, Robyn L.; Clark, Gerald E.

doi:10.7717/peerj.273

Cited by 11 publications

(6 citation statements)

References 21 publications

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“…However, the GSE supplementation reduced the incidence of double-yolk eggs. The double-yolked avian egg is a common physiological process in commercial species of poultry [31,32]. Double-yolk eggs are formed when two F1 follicles ovulated within three hours of each other become enclosed in one egg [33],…”

Section: Plos Onementioning

confidence: 99%

“…and estimated to occur in 4~12.5% of broiler breeder pullet eggs in the first 3 months of laying [34,35]. Double-yolk eggs are considered as a loss to overall commercial hatcheries because of their relatively lower yolk fertility rate due to their smaller yolk size and markedly lower hatchability rate [31,36]. Thus, maternal dietary GSE supplementation could have a beneficial for the breeders.…”

Section: Plos Onementioning

confidence: 99%

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A grape seed extract maternal dietary supplementation improves egg quality and reduces ovarian steroidogenesis without affecting fertility parameters in reproductive hens

et al. 2020

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In broiler hens, the genetic selection increased susceptibility to metabolic disorders and reproductive dysfunctions. In human ovarian cells, grape seed extracts (GSE) improved steroid production. Here, we investigated the effects of a GSE dietary supplementation on egg production and quality, fertility parameters, Reactive Oxygen Species (ROS) and steroid content in yolk egg associated to plasma adipokines in broiler hens. For this, we designed two in vivo experiments, the first one included three groups of hens: A (control), B and C (supplemented with GSE at 0.5% and 1% of the total diet composition, respectively, since week 4), and the second one used two groups of hens: A (control) and D (supplemented with GSE at 1% of the total diet composition since hatching). We assessed the egg production from 23 th to 40 th weeks and quality at 33 th week. After artificial inseminations, the fertility parameters were calculated. In egg yolk, Reactive Oxygen Species (ROS) level and steroid production were evaluated by Ros-Glo H202 and ELISA assay, respectively. Expression of steroidogenic enzymes and adipokines and their receptors was determined by RT-qPCR in ovarian cells and plasma adipokines (RARRES2, ADIPOQ and NAMPT) were evaluated by specific ELISA assays. The fertility parameters and egg production were unaffected by GSE supplementation whatever the experiment (exp.). However, the rate of double-yolk eggs decreased for all GSE supplemented groups (exp. 1 P <0.01, exp.2, P<0.02). In exp.1, C group eggs were bigger and larger (P<0.0001) and the shell elasticity was higher for both B and C (P<0.0003) as compared to control. In the egg yolk, GSE supplementation in both exp. reduced ROS content and steroidogenesis consistent with a decrease in P450 aromatase and StAR mRNA expression and basal in vitro progesterone secretion in granulosa cells (P<0.001). Interestingly, in both exp. RARRES2 plasma levels were positively

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Section: Plos Onementioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

A grape seed extract maternal dietary supplementation improves egg quality and reduces ovarian steroidogenesis without affecting fertility parameters in reproductive hens

et al. 2020

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“…Nevertheless, there is sensitivity to the issue. Robyn Bailey, who leads the ornithological NestWatch project at Cornell University, told me in an email that she was pleased to have been able to publish a paper co-authored with citizen scientist Gerald Clark in the open-access journal PeerJ (Bailey and Clark, 2014), recognising the need to share the results with all participants in the project. But she also acknowledged the pressure on academics to publish in high-impact journals, which can dramatically increase the costs if immediate access is desired.…”

Section: What Is the Impact Of Open Access On The Capacity Of Differementioning

confidence: 99%

Open access

Curry¹

2018

Science and the Politics of Openness

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The main thing, it seems to me, is to remember that technology manufactures not gadgets, but social change, ' declared science historian and broadcaster James Burke in a lecture given in 1985 (Burke, 2005). This was several years before the rise of the personal computer and the internet. But history's knack of repeating itself means that the words are no less true of the digital transformation of the world in the last two decades. The recasting of information into digital forms that can be replicated and transmitted instantly across the globe has changed our relationship with it in myriad ways. This poses commercial challenges in some industries-music, film and newspapers, for example-but at the same time has given rise to whole new businesses such as search engines, social networking and online retailing. It has also created opportunities for the public to access public information, which is changing the provision of government services and opening up new avenues for democratic dialogue. The effects have been no less profound within academia, even if they have been slower to work through the system. Our relationship with research papers and data is changing because it is easier and cheaper than ever before to put these scientific outputs into the public domain. In the era of printed journals this possibility had never arisen because of the costs of production and distribution. Now that these have largely disappeared, the question is: why not make all scientific research publicly available? However, this simple question does not have a simple answer. There remains considerable debate about the extent to which open access

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“…Because of the comparatively low fertility rate, DY eggs are deemed a loss to commercial hatching compared to single yolk (SY) eggs. This is due to the smaller yolk and the perceptibly reduced hatching rate as a result of less space for movement [6][7][8]. Contaminating other hatching eggs by bacterial or fungal infection as well as lost space and power in the incubator are risks of these eggs.…”

Section: Introductionmentioning

confidence: 99%

Double yolk eggs detection using fuzzy logic

Intarakumthornchai

Kesvarakul

2020

PLoS ONE

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Chicken egg products increased by 60% worldwide resulting in the farmers or traders egg industry. The double yolk (DY) eggs are priced higher than single yolk (SY) eggs around 35% at the same size. Although, separating DY from SY will increase more revenue but it has to be replaced at the higher cost from skilled labor for sorting. Normally, the separation of double yolk eggs required the expertise person by weigh and shape of egg but it is still high error. The purpose of this research is to detect double-yolked (DY) chicken eggs with weight and ratio of the egg’s size using fuzzy logic and developing a low cost prototype to reduce the cost of separation. The K-means clustering is used for separating DY and SY, firstly. However, the error from this technique is still high as 15.05% because of its hard clustering. Therefore, the intersection zone scattering from using the weight and ratio of the egg’s size to input of DY and SY is taken into consider with fuzzy logic algorithm, to improve the error. The results of errors from fuzzy logic are depended with input membership functions (MF). This research selects triangular MF of weight as low = 65 g, medium = 75 g and high = 85 g, while ratio of the egg is triangular MF as low = 1.30, medium = 1.40 and high = 1.50. This algorithm is not provide the minimum total error but it gives the low error to detect a double yolk while the real egg is SY as 1.43% of total eggs. This algorithm is applied to develop a double yolk egg detection prototype with Mbed platform by a load cell and OpenMV CAM, to measure the weight and ratio of the egg respectively.

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Occurrence of twin embryos in the eastern bluebird

Cited by 11 publications

References 21 publications

A grape seed extract maternal dietary supplementation improves egg quality and reduces ovarian steroidogenesis without affecting fertility parameters in reproductive hens

A grape seed extract maternal dietary supplementation improves egg quality and reduces ovarian steroidogenesis without affecting fertility parameters in reproductive hens

Open access

Double yolk eggs detection using fuzzy logic

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