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Area of Science:

  • Marine Biology
  • Zoology
  • Echinoderm Research

Background:

  • Holothurians (sea cucumbers) are commercially important in fisheries and aquaculture.
  • Previous reviews on asexual reproduction in holothurians are outdated and covered limited species.
  • Asexual reproduction is a significant biological process in marine invertebrates.

Purpose of the Study:

  • To update the understanding of asexual reproduction in holothurians.
  • To identify the prevalence of fission in Holothuroidea.
  • To describe the mechanisms and dynamics of holothurian fission.

Main Methods:

  • Literature review and analysis of existing data on holothurian reproduction.
  • Examination of newly discovered fissiparous holothurian species.
  • Analysis of physiological and molecular mechanisms underlying fission.

Main Results:

  • Asexual reproduction (fission) is confirmed in 16 holothurian species, with five more likely capable of fission.
  • The prevalence of fission in Holothuroidea is greater than previously documented.
  • Key mechanisms involve the nervous system, molecular pathways (metalloproteinases), and connective tissue alterations.

Conclusions:

  • Fission is a widespread reproductive mode in holothurians, impacting their population dynamics.
  • Understanding fission mechanisms is crucial for holothurian aquaculture and conservation.
  • Further research into the molecular and physiological control of fission is warranted.