Ultrastructure of Thunnus thynnus and Euthynnus alletteratus spermatozoa
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| Title: | Ultrastructure of Thunnus thynnus and Euthynnus alletteratus spermatozoa |
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| Authors: | Abascal, F. J.1, Medina, A.1, Megina, C.1, Calzada, A.1 |
| Source: | Journal of Fish Biology. Jan2002, Vol. 60 Issue 1, p147. 7p. |
| Subjects: | Spermatozoa, Bluefin tuna, Euthynnus alletteratus |
| Abstract: | The spermatozoa of Thunnus thynnus and Euthynnus alletteratus consist of an acrosome-less head (comprising the ovoid nucleus and the short midpiece) and a long flagellar tail that contains the conventional 9+2 axoneme and lacks lateral fins. The centrioles are arranged at approximately right angles and lie outside of a shallow nuclear groove. The flagellum inserts laterally on the nucleus, therefore the spermatozoon is asymmetrical. The midpiece contains a few mitochondria which are separated from the axoneme by the cytoplasmic canal; they are spherical in T. thynnus and elongate, somewhat irregular in E. alletteratus. Although the main ultrastructural characteristics of the spermatozoa appear to indicate a great homogeneity in the sperm morphology within the family Scombridae, small species-specific divergences may be of use in systematics. [Copyright &y& Elsevier] |
| Copyright of Journal of Fish Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 8495857 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Ultrastructure of Thunnus thynnus and Euthynnus alletteratus spermatozoa – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Abascal%2C+F%2E+J%2E%22">Abascal, F. J.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Medina%2C+A%2E%22">Medina, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Megina%2C+C%2E%22">Megina, C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Calzada%2C+A%2E%22">Calzada, A.</searchLink><relatesTo>1</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Fish+Biology%22">Journal of Fish Biology</searchLink>. Jan2002, Vol. 60 Issue 1, p147. 7p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Spermatozoa%22">Spermatozoa</searchLink><br /><searchLink fieldCode="DE" term="%22Bluefin+tuna%22">Bluefin tuna</searchLink><br /><searchLink fieldCode="DE" term="%22Euthynnus+alletteratus%22">Euthynnus alletteratus</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The spermatozoa of Thunnus thynnus and Euthynnus alletteratus consist of an acrosome-less head (comprising the ovoid nucleus and the short midpiece) and a long flagellar tail that contains the conventional 9+2 axoneme and lacks lateral fins. The centrioles are arranged at approximately right angles and lie outside of a shallow nuclear groove. The flagellum inserts laterally on the nucleus, therefore the spermatozoon is asymmetrical. The midpiece contains a few mitochondria which are separated from the axoneme by the cytoplasmic canal; they are spherical in T. thynnus and elongate, somewhat irregular in E. alletteratus. Although the main ultrastructural characteristics of the spermatozoa appear to indicate a great homogeneity in the sperm morphology within the family Scombridae, small species-specific divergences may be of use in systematics. [Copyright &y& Elsevier] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Fish Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/j.1095-8649.2002.tb02394.x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 7 StartPage: 147 Subjects: – SubjectFull: Spermatozoa Type: general – SubjectFull: Bluefin tuna Type: general – SubjectFull: Euthynnus alletteratus Type: general Titles: – TitleFull: Ultrastructure of Thunnus thynnus and Euthynnus alletteratus spermatozoa Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Abascal, F. J. – PersonEntity: Name: NameFull: Medina, A. – PersonEntity: Name: NameFull: Megina, C. – PersonEntity: Name: NameFull: Calzada, A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2002 Type: published Y: 2002 Identifiers: – Type: issn-print Value: 00221112 Numbering: – Type: volume Value: 60 – Type: issue Value: 1 Titles: – TitleFull: Journal of Fish Biology Type: main |
| ResultId | 1 |
