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Sperm maturation and male tactic-specific differences in ejaculates in the plainfin midshipman fish Porichthys notatus

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2019

Autor:innen

Miller, Jessica S.
Fitzpatrick, John L.
Balshine, Sigal

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https://doi.org/10.1111/jfb.13912
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Biologie: Publikationen
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Published

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Journal of Fish Biology. The Fisheries Society of the British Isles / Wiley. 2019, 94(3), pp. 434-445. ISSN 0022-1112. eISSN 1095-8649. Available under: doi: 10.1111/jfb.13912

Zusammenfassung

Using the plainfin midshipman fish Porichthys notatus, a species with alternative reproductive tactics (ARTs), we investigated how sperm maturation shapes sperm competitive abilities. We compared sperm performance and morphology before and after final sperm maturation by sampling sperm from the testes and stripped ejaculates of guarders and sneakers. In accordance with sperm competition risk theory, ejaculates from sneaker males had three times as much sperm as ejaculates from guarder males and sneaker males produced faster swimming sperm than guarder males, but this was only the case after final sperm maturation had occurred. Additionally, fully mature sperm found in ejaculates had larger heads and midpieces than sperm found in the testes. These results emphasize the important role played by non-sperm components of an ejaculate in mediating sperm performance and potentially also morphology.

Zusammenfassung in einer weiteren Sprache

Fachgebiet (DDC)
570 Biowissenschaften, Biologie

Schlagwörter

alternative reproductive tactics, guarder male, seminal fluid, sneaker male, sperm competition, sperm velocity

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ISO 690MILLER, Jessica S., Aneesh P. H. BOSE, John L. FITZPATRICK, Sigal BALSHINE, 2019. Sperm maturation and male tactic-specific differences in ejaculates in the plainfin midshipman fish Porichthys notatus. In: Journal of Fish Biology. The Fisheries Society of the British Isles / Wiley. 2019, 94(3), pp. 434-445. ISSN 0022-1112. eISSN 1095-8649. Available under: doi: 10.1111/jfb.13912
BibTex
@article{Miller2019-03Sperm-50155,
  year={2019},
  doi={10.1111/jfb.13912},
  title={Sperm maturation and male tactic-specific differences in ejaculates in the plainfin midshipman fish Porichthys notatus},
  number={3},
  volume={94},
  issn={0022-1112},
  journal={Journal of Fish Biology},
  pages={434--445},
  author={Miller, Jessica S. and Bose, Aneesh P. H. and Fitzpatrick, John L. and Balshine, Sigal}
}
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    <dcterms:abstract xml:lang="eng">Using the plainfin midshipman fish Porichthys notatus, a species with alternative reproductive tactics (ARTs), we investigated how sperm maturation shapes sperm competitive abilities. We compared sperm performance and morphology before and after final sperm maturation by sampling sperm from the testes and stripped ejaculates of guarders and sneakers. In accordance with sperm competition risk theory, ejaculates from sneaker males had three times as much sperm as ejaculates from guarder males and sneaker males produced faster swimming sperm than guarder males, but this was only the case after final sperm maturation had occurred. Additionally, fully mature sperm found in ejaculates had larger heads and midpieces than sperm found in the testes. These results emphasize the important role played by non-sperm components of an ejaculate in mediating sperm performance and potentially also morphology.</dcterms:abstract>
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