Changes in Chemical Contents and Enzyme Activities during Embryonic Development of Bluefin Tuna
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- Takii Kenji
- Fisheries Laboratory, Kinki University
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- Miyashita Shigeru
- Fisheries Laboratory, Kinki University
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- Seoka Manabu
- Fisheries Laboratory, Kinki University
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- Tanaka Yuji
- Faculty of Agriculture, Kinki University
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- Kubo Yoshikazu
- Faculty of Agriculture, Kinki University
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- Kumai Hidemi
- Fisheries Laboratory, Kinki University
Bibliographic Information
- Other Title
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- Changes in Chemical Contents and Enzyme
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Abstract
Naturally fertilized bluefin tuna Thunnus thynnus eggs which were obtained from 7-year-old broodstock in a net cage were incubated until hatching at 27°C. No conspicuous changes were found in egg moisture and amounts of total nitrogen and phospholipid during the embryonic development. Egg protein gradually increased, but free amino acid decreased with the development. Triacylglycerole (TG), a main egg constituent of 420mg/g dry egg at the stage of early cleavage, rapidly decreased after the stage of late gastrula and reached 140mg/g dry egg just before hatching. Activities of aspartate aminotransferase, alanine aminotransferase, creatine kinase, and lactate dehydrogenase fell between the stages of early cleavage and Kupffer's vesicle and rose thereafter. Activities of alkaline phosphatase remained high until embryo formation but fell rapidly thereafter. These results indicate that TG plays an important role as a main energy fuel, and that the differentiation and formation of organs are prompted immediately before or after the stage of Kupffer's vesicle during the embryonic development of bluefin tuna.
Journal
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- Fisheries science
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Fisheries science 63 (6), 1014-1018, 1997
The Japanese Society of Fisheries Science
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Keywords
Details 詳細情報について
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- CRID
- 1390001204428892672
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- NII Article ID
- 130003903148
- 10004872645
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- NII Book ID
- AA10993718
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- NDL BIB ID
- 4371634
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- ISSN
- 09199268
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed