Hermaphroditism in fishes: an annotated list of species, phylogeny, and mating system

@article{Kuwamura2020HermaphroditismIF,
  title={Hermaphroditism in fishes: an annotated list of species, phylogeny, and mating system},
  author={Tetsuo Kuwamura and Tomoki Sunobe and Yoichi Sakai and Tatsuru Kadota and Kota Sawada},
  journal={Ichthyological Research},
  year={2020},
  volume={67},
  pages={341-360}
}
Fewer than 1% of vertebrate species are hermaphroditic, and essentially all of these are fishes. Four types of hermaphroditism are known in fishes: simultaneous (or synchronous) hermaphroditism (SH), protandry (male-to-female sex change; PA), protogyny (female-to-male sex change; PG), and bidirectional sex change (BS or reversed sex change in protogynous species). Here we present an annotated list of hermaphroditic fish species from a comprehensive review and careful re-examination of all… 

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References

SHOWING 1-10 OF 60 REFERENCES

Phylogenetic perspectives on the evolution of functional hermaphroditism in teleost fishes.

TLDR
This work strongly supports sexual lability within teleost fishes and confirms evolutionary theories of sex allocation in this group of vertebrates.

Functional hermaphroditism in teleosts

TLDR
The review confirms functional hermaphroditism in 27 teleost families in seven orders, predominantly among tropical, marine perciforms in which its diversity of expression is greatest, and explores its phylogenetic distribution, possible origin and range of expression.

Criteria for the Diagnosis of Hermaphroditism in Fishes

TLDR
The strongest indicators of protandry are transitional individuals whose gonads contain degenerating testicular tissue and developing ovarian tissue, and experimental production of transitional or sex-reversed individuals through manipulation of the social system may identify both protogyny and prot andry.

Bi-directional sex change in marine fishes

TLDR
The discovery that individuals of some species can change sex more than once has opened up a whole new area of research into the adaptive significance and proximate mechanisms of sex change in fishes.

Reversed sex-change in the protogynous reef fish Labroides dimidiatus

TLDR
The sex of L. dimidiatus is strictly determined by social status whenever it changes after mate loss, and the first report of reversed sex-change among protogynous wrasses is reported.

Evolution of alternative sex-determining mechanisms in teleost fishes

TLDR
The evolutionary lability of sex-determining modes in fishes contrasts strikingly with the evolutionary conservatism of sex determination within both mammals and birds.

Mating Systems, Sex Change and Sexual Demography in the Rainbow Wrasse, Thalassoma lucasanum

TLDR
This study extends observations to the abundant rainbow wrasse of the eastern tropical Pacific, finding that social mediation of sex change may be of value in preventing sex change from occurring at all in situations where the costs of transformation are too great.

Sexual Allocation in a Simultaneously Hermaphroditic Coral Reef Fish

TLDR
E egg trading and the pattern of allocation of reproductive effort account for the evolutionary stability of the hermaphroditism by providing a fecundity advantage similar to that of parthenogens over sexual organisms.

Sexual selection and reproductive success in hermaphroditic seabasses.

  • C. Petersen
  • Biology
    Integrative and comparative biology
  • 2006
TLDR
Although simultaneous hermaphroditic fishes are often held up as strong examples of cooperation in mating behavior, a closer examination reveals significant sexual selection and sexual conflict between male and female roles among individuals.

Comparative Gonad Morphology and Sexuality of the Muraenidae (Pisces, Teleostei)

TLDR
In this family of fishes, four fundamentally different strategies of reproduction have been recognized, including simultaneous hermaphrodites in which male and female gonads develop in each individual from the smallest to the largest.
...