2020
DOI: 10.1111/brv.12607
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The evolution and physiology of male pregnancy in syngnathid fishes

Abstract: The seahorses, pipefishes and seadragons (Syngnathidae) are among the few vertebrates in which pregnant males incubate developing embryos. Syngnathids are popular in studies of sexual selection, sex‐role reversal, and reproductive trade‐offs, and are now emerging as valuable comparative models for the study of the biology and evolution of reproductive complexity. These fish offer the opportunity to examine the physiology, behavioural implications, and evolutionary origins of embryo incubation, independent of t… Show more

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Cited by 50 publications
(50 citation statements)
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(360 reference statements)
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“…Like other syngnathids, seadragons have specialized morphological traits such as a tube-like toothless mouth, the absence of pelvic fins and scales, a bony armor covering the body, and "male pregnancy." Males of all syngnathids incubate the fertilized eggs on a specialized incubation area, and in the modern lineages, even in enclosed brood pouches, making them prime examples for sex-role reversal (1)(2)(3). On the basis of the position of the brood pouch, syngnathids have been divided into tail-brooders (subfamily Syngnathinae represented by seahorses, some pipefishes and seadragons) and trunk-brooders (subfamily Nerophinae represented by Manado pipefish) (4,5).…”
Section: Introductionmentioning
confidence: 99%
“…Like other syngnathids, seadragons have specialized morphological traits such as a tube-like toothless mouth, the absence of pelvic fins and scales, a bony armor covering the body, and "male pregnancy." Males of all syngnathids incubate the fertilized eggs on a specialized incubation area, and in the modern lineages, even in enclosed brood pouches, making them prime examples for sex-role reversal (1)(2)(3). On the basis of the position of the brood pouch, syngnathids have been divided into tail-brooders (subfamily Syngnathinae represented by seahorses, some pipefishes and seadragons) and trunk-brooders (subfamily Nerophinae represented by Manado pipefish) (4,5).…”
Section: Introductionmentioning
confidence: 99%
“…Due to the uncommon nature of reproduction, syngnathids offer a unique opportunity to examine pathways of repercussion of breeder's dietary resources on breeding performance and the resulting newborn quality. Reproduction in seahorses has received increasing attention in recent years, mostly on the effect of environment (e.g., photoperiod regime and temperature) (Lin et al, 2006(Lin et al, , 2008bPlanas et al, 2010Planas et al, , 2013 zootechnical conditions (e.g., sex ratio, aquaria design, and seahorse size) (Woods, 2000;Dzyuba et al, 2006;Faleiro et al, 2008Faleiro et al, , 2016Planas et al, 2008) and biological / physiological features (Boisseau, 1967;Carcupino et al, 2002;Poortenaar et al, 2004;Stölting and Wilson, 2007;Scobell and MacKenzie, 2011;Zhang et al, 2019;Wittington and Friesen, 2020). Only a few studies have focused on the effects of feeding and dietary sources on breeding success and newborn features in seahorses under ex-situ conditions (Lin et al, 2007;Faleiro and Narciso, 2010;Binh and Serrano, 2012;Otero-Ferrer et al, 2012Palma et al, 2012Palma et al, , 2017Saavedra et al, 2015).…”
Section: Introductionmentioning
confidence: 99%
“…and copepods), keeping of breeders, and maintenance of a nursery facility for juveniles as they grow into an appropriate size [43,44,51,181,183]. There is no larval breeding stage because fertilized eggs are incubated inside the male's pouch [43,[184][185][186][187]. Seahorse species in captivity usually become sexually active at ages of around 3 to 6 months.…”
Section: Methods Of Seahorse Aquaculturementioning
confidence: 99%