Occurrence of twin embryos in the eastern bluebird

Bailey, Robyn L.; Clark, Gerald E.

doi:10.7287/peerj.preprints.186v1

Cited by 3 publications

(4 citation statements)

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“…Evolution MegaLab, a European study, successfully gathered a modern sample of an indicator species with a genetically based trait (color) that could be evolutionarily responsive to external pressures (climate, changing predation) and showed that variations in color in the target snail species were likely not the result of changing climate but were caused by changing predation pressures (41). Long-term monitoring projects like these also facilitate rare detections in which many eyes are needed, but only a few will actually find something [see, for example, publications from the Lost Ladybug Project indicating the detection of new ladybug species (42), from NestWatch on a first official record of twinning in bluebirds (43), and from routine cetacean surveys in Israel documenting the first ever recorded instance of a gray whale there (44)]. Together, these projects cover a spectrum of scientific approaches, ranging from post hoc or real-time pattern detection (Plant Watch, eBird, Voyages Bio Sous-Marine) to experimental or observational hypothesis testing (Monarch Health, Evolution MegaLab, Belly Button Biodiversity), illustrating the scientific, geographic, and temporal potential of citizen science.…”

Section: Ecological Research Outcomes Of Note From 2009 Through 2013mentioning

confidence: 99%

Citizen Science: A Tool for Integrating Studies of Human and Natural Systems

Crain

Cooper

Dickinson

2014

Annu. Rev. Environ. Resour.

122

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Citizen science has proliferated in the last decade, becoming a critical form of public engagement in science and an increasingly important research tool for the study of large-scale patterns in nature. Although citizen science is already interdisciplinary, it has untapped potential to build capacity for transformative research on coupled human and natural systems. New tools have begun to collect paired ecological and social data from the same individual; this allows for detailed examination of feedbacks at the level of individuals and potentially provides much-needed data for agent-based modeling. With the ongoing professionalization of citizen science, the field can benefit from integrating a coupled systems perspective, including a broadening of the social science perspectives considered. This can lead to new schema and platforms to increase support for large-scale research on coupled natural and human systems.

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Section: Ecological Research Outcomes Of Note From 2009 Through 2013mentioning

confidence: 99%

Citizen Science: A Tool for Integrating Studies of Human and Natural Systems

Crain

Cooper

Dickinson

2014

Annu. Rev. Environ. Resour.

122

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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 (40,41). Double-yolk eggs are formed when two F1 follicles ovulated within three hours of each other become enclosed in one egg (42), and estimated to occur in 4 ~…”

Section: Gse Reduced Ros Level In Egg Yolkmentioning

confidence: 99%

“…12.5% of broiler breeder pullet eggs in the first 3 months of laying (43,44). 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 (40,45). Thus, maternal…”

Section: Gse Reduced Ros Level In Egg Yolkmentioning

confidence: 99%

A grape seed extract maternal dietary supplementation improves egg quality and reduces ovarian steroidogenesis without affecting fertility parameters in reproductive hens: a link with plasma and ovarian cell adipokines expression?

Barbe

Mellouk

Ramé

et al. 2020

Preprint

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Background: In mammals, oxidative stress (OS) induces negative effects on reproductive functions. In broiler hens, the genetic selection has increased susceptibility to OS. Grape seed extracts (GSE) are known as potent antioxidants. Here, we investigated the effects of time and level of 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. Methods: We designed an in vivo study using four groups of hens: A (control), B and C (supplemented with GSE at 0.5% and 1% of the total diet composition, respectively, starting at week 4) 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. Results: The fertility parameters and egg production were unaffected by GSE supplementation. However, the rate of double-yolk eggs decreased for all GSE supplemented. Eggs from the C group were bigger and larger. The shell elasticity was higher for B and C groups. In the yolk egg, GSE supplementation 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. Interestingly, RARRES2 plasma levels were positively correlated while ADIPOQ and NAMPT plasma levels were negatively correlated, with steroids and ROS in yolk. Conclusions: Maternal dietary GSE supplementation did not affect egg production and fertility parameters whereas it reduced ROS content and steroidogenesis in yolk egg. Furthermore, it ameliorated egg quality by decreasing the number of double-yolk eggs and by improving the size of normal eggs and the elasticity of the shell. Taken together, our data suggest the possibility of using dietary maternal GSE to improve egg quality.

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“…33-34 days of incubation, likewise the twin emu embryos described by Wierci nska and Szczerbi nska (2005). Particularly interesting seems to be the case of two genetically identical emu chicks (Bassett et al 1999) and the case of successful hatching of eastern bluebird (Sialia siali) twins (Bailey and Clark 2014). The latter is even more interesting considering that the chicks hatched as a result of natural incubation without human interference.…”

Section: Introductionmentioning

confidence: 99%

A Case of Bronze Turkey Twins Developing from Hatching

Damaziak

Michalczuk

Zdanowska‐Sąsiadek

et al. 2014

Reprod Domestic Animals

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A double-yolked egg that was laid by an 11-month-old bronze turkey hen on 2 April, 2013 was reported. The presented case of developing turkey twin embryos is the first ever described case for this species. The egg weighed 125 g and had 74.6 mm in length and 53.0 mm in width. The embryos died between the 23rd and 24th day of incubation. Both twin 1 and twin 2 were fully developed with body weights of: 37.7 g and 40.3 g, respectively. The likely causes of death include inappropriate arrangement of embryos and insufficient gas exchange in the last period of incubation. The embryos were arranged along the long axis of the egg, one underneath the other, and were closely adhering to one another. The twins were different in plumage pigmentation. In twin 1, a spontaneous mutation of plumage pigmentation (B) was observed, whereas twin 2 showed appropriate pigmentation (b+) in respect to parents.

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Occurrence of twin embryos in the eastern bluebird

Abstract: We report the first record of presumed twinning in eastern bluebird (Sialia sialis) and provide a review of all previously reported twinning events in wild birds. A nest containing twin

Cited by 3 publications

References 0 publications

Citizen Science: A Tool for Integrating Studies of Human and Natural Systems

Citizen Science: A Tool for Integrating Studies of Human and Natural Systems

A grape seed extract maternal dietary supplementation improves egg quality and reduces ovarian steroidogenesis without affecting fertility parameters in reproductive hens: a link with plasma and ovarian cell adipokines expression?

A Case of Bronze Turkey Twins Developing from Hatching

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