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Longitudinal Observation of Japanese Lancelet, Branchiostoma japonicum, Metamorphosis
Joint Authors
Hoshino, Yoichi
Kaji, Takao
Henmi, Yasuhisa
Yasui, Kinya
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-23
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
The lancelet (amphioxus) performs metamorphosis and produces minute and ciliate pelagic larvae commonly found in other metamorphic marine invertebrates.
During larval life and metamorphosis, however, the animal displays interesting combination of features not found in other animals such as long coexistence of ciliate and muscular locomotion and no change in feeding behavior.
The uniqueness of lancelet metamorphosis can provide important data to understand the evolutionary history of this animal as well as the metamorphosis broadly appeared in metazoans.
Although lancelet metamorphosis has been studied, all previous studies depended on cross-sectional observations.
To get serial data on metamorphic events, we performed longitudinal observations on the Japanese lancelet under the culture condition and confirmed the following: (1) there were individual variations of the duration of metamorphosis from 15 to 27 days; (2) growth was arrested for a month and the maximum reduction of the body length (2.2%–3.2%) occurred when gill slits became paired; (3) during rather long duration of metamorphosis, the oral transformation and the division of the gill pores by tongue bar were completed within two to four days.
Our observations suggest that the duration and mode of lancelet metamorphosis depend mainly on intrinsic requirements rather than on extrinsic selective pressures.
American Psychological Association (APA)
Kaji, Takao& Hoshino, Yoichi& Henmi, Yasuhisa& Yasui, Kinya. 2012. Longitudinal Observation of Japanese Lancelet, Branchiostoma japonicum, Metamorphosis. Dataset Papers in Biology،Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-502325
Modern Language Association (MLA)
Kaji, Takao…[et al.]. Longitudinal Observation of Japanese Lancelet, Branchiostoma japonicum, Metamorphosis. Dataset Papers in Biology No. 2013 (2013), pp.1-6.
https://search.emarefa.net/detail/BIM-502325
American Medical Association (AMA)
Kaji, Takao& Hoshino, Yoichi& Henmi, Yasuhisa& Yasui, Kinya. Longitudinal Observation of Japanese Lancelet, Branchiostoma japonicum, Metamorphosis. Dataset Papers in Biology. 2012. Vol. 2013, no. 2013, pp.1-6.
https://search.emarefa.net/detail/BIM-502325
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-502325