{"created":"2024-06-10T08:53:31.056203+00:00","id":2007431,"links":{},"metadata":{"_buckets":{"deposit":"f9a61747-e870-4a63-bb70-206efdb1b716"},"_deposit":{"created_by":10,"id":"2007431","owners":[10],"pid":{"revision_id":0,"type":"depid","value":"2007431"},"status":"published"},"_oai":{"id":"oai:fra.repo.nii.ac.jp:02007431","sets":["12:14:1716950799012"]},"author_link":["488"],"item_10002_alternative_title_1":{"attribute_name":"その他（別言語等）のタイトル","attribute_value_mlt":[{"subitem_alternative_title":"卵・精子の微細構造","subitem_alternative_title_language":"ja"}]},"item_10002_biblio_info_7":{"attribute_name":"書誌情報","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"1997-03","bibliographicIssueDateType":"Issued"},"bibliographicNumberOfPages":"9","bibliographicPageEnd":"147","bibliographicPageStart":"139","bibliographicVolumeNumber":"59","bibliographic_titles":[{"bibliographic_title":"東北区水産研究所研究報告","bibliographic_titleLang":"ja"},{"bibliographic_title":"Bulletin of Tohoku National Fisheries Researh Institute","bibliographic_titleLang":"en"}]}]},"item_10002_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"Ultrastructural observations were made on mature eggs and spermatozoa of the Pacific saury, Cololabis saira. The egg membrane is composed of a thin outer layer and a thick highly differentiated inner layer with a reticulated structure. Remarkable attaching filaments which develop at two different locations on the egg surface : a bundle of microfibrils (about 20) in the micropylar region and a single filament on the equator of the egg. Possible role of these filaments seems to improve fertilization events in addition to being tools for attachment. The spermatozoon is a basic teleostean anacrosomal aquasperm with a bell shaped homogeneously electron-dense nucleus which has no deep axial nuclear fossa. The short midpiece contains about 6 mitochondria encircling the basal body of the flagellum as a sleeve; the flagellum bears a lateral fin. We suggest that the elongated feature of the head peculiar to this aquasperm may be associated with the unique mode of fertilization.","subitem_description_language":"en","subitem_description_type":"Abstract"}]},"item_10002_publisher_8":{"attribute_name":"出版者","attribute_value_mlt":[{"subitem_publisher":"東北区水産研究所","subitem_publisher_language":"ja"},{"subitem_publisher":"Tohoku National Fisheries Researh 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