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Sex-changing patterns of Akoya pearl oyster (Pinctada fucata)

Overview of attention for article published in Zoological Letters, June 2018
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Sex-changing patterns of Akoya pearl oyster (Pinctada fucata)
Published in
Zoological Letters, June 2018
DOI 10.1186/s40851-018-0098-7
Pubmed ID

Jeane Siswitasari Mulyana, Toshiharu Iwai, Masaharu Takahashi, Achmad Farajallah, Yusli Wardiatno, Chiemi Miura, Takeshi Miura


Pearl production by transplantation in Akoya pearl oyster (Pinctada fucata) is a biotechnology developed in Japan that skillfully utilizes the pearl-forming ability of oysters. In this method, cultured pearls are formed from a pearl nucleus and a small piece of mantle transplanted into the gonads of recipient pearl oysters. In this study, we hypothesized that the sex of the recipient pearl oyster might affect the quality of pearl produced. While some previous studies have examined the sex of Akoya pearl oyster, detailed information is lacking. To investigate sex in Akoya pearl oyster, we collected small gonadal fragments from 1-year-old pearl oysters by biopsy. Using the collected gonad fragment, the sex of the oysters was determined by microscopic observation, and the remaining samples were stored for gene expression analyses. All oysters were labeled to distinguish each individual for serial samplings every four months over the 2-year study period. At the start of experiment, nearly all of the pearl oysters were male, but the male:female ratio ofmale decreased over the course of the experiment. Interestingly, the number of males increased after spring, during the breeding season. This suggests that, in pearl oyster, sex is affected by season. Expression analysis of sex-related genes (Dmrt2, Vtg, Zp) indicated that all genes were expressed in all individuals and all periods. These results suggest that Akoya pearl oysters are hermaphroditic, and that females appear as necessary, such as during the breeding season. These findings could contribute to higher efficiency and quality of pearl cultivation.

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Mendeley readers

The data shown below were compiled from readership statistics for 12 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 12 100%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 2 17%
Lecturer > Senior Lecturer 1 8%
Lecturer 1 8%
Unspecified 1 8%
Professor 1 8%
Other 3 25%
Unknown 3 25%
Readers by discipline Count As %
Agricultural and Biological Sciences 5 42%
Biochemistry, Genetics and Molecular Biology 3 25%
Unspecified 1 8%
Unknown 3 25%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 12 June 2018.
All research outputs
of 13,073,426 outputs
Outputs from Zoological Letters
of 112 outputs
Outputs of similar age
of 270,372 outputs
Outputs of similar age from Zoological Letters
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Altmetric has tracked 13,073,426 research outputs across all sources so far. This one is in the 23rd percentile – i.e., 23% of other outputs scored the same or lower than it.
So far Altmetric has tracked 112 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 11.9. This one is in the 18th percentile – i.e., 18% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 270,372 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 30th percentile – i.e., 30% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 3 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them