Morphology and Ultrastructure of the Amazon River Dolphin (Inia geoffrensis) Spermatozoa

Rodrigo S. Amaral (Lead / Corresponding author), Vera M. F. da Silva, Fabíola X. Valdez Domingos, Anthony R. Martin

    Research output: Contribution to journalArticle

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    Abstract

    The spermatozoa from seven adult Amazon river dolphins (Inia geoffrensis, CETACEA: INIIDAE) were analyzed by light and electron microscopy. The spermatozoa showed an elongated ellipsoid shaped head and a long tail with a well distinguishable midpiece. The head spermatozoa have a smooth surface like other odontocetes examined, with the exception of the Delphinidae family. The mean dimensions of the spermatozoa were within the range already reported for other cetaceans. The spermatozoa midpiece, as in other cetaceans, showed a random pattern of mitochondria, different from that described for other mammals. Further studies of sperm morphology of a wider spectrum of cetacean families could help to better understand the reproductive biology of these animals and the inter- and intra-generic relationships among them, as well as, among other mammals. This article is protected by copyright. All rights reserved.

    Original languageEnglish
    Pages (from-to)1519-1523
    Number of pages5
    JournalAnatomical Record : Advances in Integrative Anatomy and Evolutionary Biology
    Volume300
    Issue number8
    Early online date3 Mar 2017
    DOIs
    Publication statusPublished - Aug 2017

    Fingerprint

    Dolphins
    cetacean
    dolphin
    ultrastructure
    Spermatozoa
    spermatozoa
    mammal
    river
    reproductive biology
    mitochondrion
    electron microscopy
    sperm
    microscopy
    Mammals
    Delphinidae
    mammals
    animal
    zoology
    Inia geoffrensis
    Tail

    Keywords

    • Amazon river dolphin
    • Cetacean
    • Inia geoffrensis
    • Reproduction
    • Sperm

    Cite this

    Amaral, Rodrigo S. ; da Silva, Vera M. F. ; Valdez Domingos, Fabíola X. ; Martin, Anthony R. / Morphology and Ultrastructure of the Amazon River Dolphin (Inia geoffrensis) Spermatozoa. In: Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology. 2017 ; Vol. 300, No. 8. pp. 1519-1523.
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    title = "Morphology and Ultrastructure of the Amazon River Dolphin (Inia geoffrensis) Spermatozoa",
    abstract = "The spermatozoa from seven adult Amazon river dolphins (Inia geoffrensis, CETACEA: INIIDAE) were analyzed by light and electron microscopy. The spermatozoa showed an elongated ellipsoid shaped head and a long tail with a well distinguishable midpiece. The head spermatozoa have a smooth surface like other odontocetes examined, with the exception of the Delphinidae family. The mean dimensions of the spermatozoa were within the range already reported for other cetaceans. The spermatozoa midpiece, as in other cetaceans, showed a random pattern of mitochondria, different from that described for other mammals. Further studies of sperm morphology of a wider spectrum of cetacean families could help to better understand the reproductive biology of these animals and the inter- and intra-generic relationships among them, as well as, among other mammals. This article is protected by copyright. All rights reserved.",
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    author = "Amaral, {Rodrigo S.} and {da Silva}, {Vera M. F.} and {Valdez Domingos}, {Fab{\'i}ola X.} and Martin, {Anthony R.}",
    note = "This study was part of Projeto Boto, a research project set up under a cooperative agreement between the National Amazon Research Institute – INPA/MCTI and the Mamirau{\'a} Sustainable Development Institute – IDSM-OS/ MCTI. We thank the Laborat{\'o}rio Tem{\'a}tico de Microscopia {\'O}ptica e Eletr{\^o}nica – LMTOE/INPA staff for their assistance in the sample analysis, and Petrobras Socioambiental (Projeto Mam{\'i}feros Aqu{\'a}ticos da Amaz{\^o}nia: Conserva{\cc}{\~a}o e Pesquisa) and Associa{\cc}{\~a}o Amigos do Peixe-boi (AMPA) for their financial support. This scientific paper was developed with Amazonas government support through the Funda{\cc}{\~a}o de Amparo {\`a} Pesquisa do Estado do Amazonas (PAPAC 020/2013 – Process no 062.00888/2014).",
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    Morphology and Ultrastructure of the Amazon River Dolphin (Inia geoffrensis) Spermatozoa. / Amaral, Rodrigo S. (Lead / Corresponding author); da Silva, Vera M. F.; Valdez Domingos, Fabíola X.; Martin, Anthony R.

    In: Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology, Vol. 300, No. 8, 08.2017, p. 1519-1523.

    Research output: Contribution to journalArticle

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    AU - Martin, Anthony R.

    N1 - This study was part of Projeto Boto, a research project set up under a cooperative agreement between the National Amazon Research Institute – INPA/MCTI and the Mamirauá Sustainable Development Institute – IDSM-OS/ MCTI. We thank the Laboratório Temático de Microscopia Óptica e Eletrônica – LMTOE/INPA staff for their assistance in the sample analysis, and Petrobras Socioambiental (Projeto Mamíferos Aquáticos da Amazônia: Conservação e Pesquisa) and Associação Amigos do Peixe-boi (AMPA) for their financial support. This scientific paper was developed with Amazonas government support through the Fundação de Amparo à Pesquisa do Estado do Amazonas (PAPAC 020/2013 – Process no 062.00888/2014).

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    N2 - The spermatozoa from seven adult Amazon river dolphins (Inia geoffrensis, CETACEA: INIIDAE) were analyzed by light and electron microscopy. The spermatozoa showed an elongated ellipsoid shaped head and a long tail with a well distinguishable midpiece. The head spermatozoa have a smooth surface like other odontocetes examined, with the exception of the Delphinidae family. The mean dimensions of the spermatozoa were within the range already reported for other cetaceans. The spermatozoa midpiece, as in other cetaceans, showed a random pattern of mitochondria, different from that described for other mammals. Further studies of sperm morphology of a wider spectrum of cetacean families could help to better understand the reproductive biology of these animals and the inter- and intra-generic relationships among them, as well as, among other mammals. This article is protected by copyright. All rights reserved.

    AB - The spermatozoa from seven adult Amazon river dolphins (Inia geoffrensis, CETACEA: INIIDAE) were analyzed by light and electron microscopy. The spermatozoa showed an elongated ellipsoid shaped head and a long tail with a well distinguishable midpiece. The head spermatozoa have a smooth surface like other odontocetes examined, with the exception of the Delphinidae family. The mean dimensions of the spermatozoa were within the range already reported for other cetaceans. The spermatozoa midpiece, as in other cetaceans, showed a random pattern of mitochondria, different from that described for other mammals. Further studies of sperm morphology of a wider spectrum of cetacean families could help to better understand the reproductive biology of these animals and the inter- and intra-generic relationships among them, as well as, among other mammals. This article is protected by copyright. All rights reserved.

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    KW - Reproduction

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