First report of recurrent parthenogenesis as an adaptive reproductive strategy in the endangered common smooth-hound shark Mustelus mustelus.

Autor: Esposito G; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy. giuseppe.esposito@izsto.it., Meletiadis A; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy., Sciuto S; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy., Prearo M; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy., Gagliardi F; Panaque S.R.L. - Acquario Di Cala Gonone, Via La Favorita Snc, 08022, Cala Gonone, Dorgali, Italy., Corrias I; Panaque S.R.L. - Acquario Di Cala Gonone, Via La Favorita Snc, 08022, Cala Gonone, Dorgali, Italy., Pira A; Panaque S.R.L. - Acquario Di Cala Gonone, Via La Favorita Snc, 08022, Cala Gonone, Dorgali, Italy., Dondo A; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy., Briguglio P; Clinica Veterinaria Duemari, Via Cagliari 313, 09170, Oristano, Italy., Ghittino C; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy., Dedola D; Istituto Zooprofilattico Sperimentale Della Sardegna, Via Duca Degli Abruzzi 8, 07100, Sassari, Italy., Bozzetta E; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy., Acutis PL; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy., Pastorino P; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy. paolo.pastorino@izsto.it., Colussi S; Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d'Aosta, Via Bologna 148, 10154, Turin, Italy.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Jul 26; Vol. 14 (1), pp. 17171. Date of Electronic Publication: 2024 Jul 26.
DOI: 10.1038/s41598-024-67804-1
Abstrakt: Parthenogenesis, or virgin birth, describes a mode of reproduction where an egg develops into an offspring without fertilization, and is observed across various vertebrate taxa, excluding mammals. Obligate parthenogenesis, found in around 100 vertebrate species and 1000 invertebrate species, is relatively rare. Conversely, facultative parthenogenesis, where females can reproduce both sexually and parthenogenetically, is observed in some vertebrates, including elasmobranchs. Notably, this phenomenon in elasmobranchs is mainly documented in captivity, allowing for detailed long-term observation. Specifically, this study reports the first case of facultative parthenogenesis in the common smooth-hound shark Mustelus mustelus, a species classified by IUCN as endangered. Here we show that the juvenile M. mustelus were born through parthenogenesis, exhibiting homozygosity at each genetic marker, consistent with terminal fusion automixis. Remarkably, this finding reveals that parthenogenesis can occur annually in these sharks, alternating between two females, and conclusively excludes long-term sperm storage as a cause. Consequently, this enhances our understanding of parthenogenesis in elasmobranchs and highlights the reproductive flexibility of M. mustelus. Overall, these results contribute to our broader understanding of reproductive strategies in elasmobranchs, which could inform conservation efforts for endangered species.
(© 2024. The Author(s).)
Databáze: MEDLINE
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