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Methods for generating year-round access to amphioxus in the laboratory.

Elia Benito-Gutiérrez1, Hermann Weber, Diana Virginia Bryant

  • 1Developmental Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany.

Plos One
|August 31, 2013
PubMed
Summary

Researchers developed a novel inland marine facility to establish stable amphioxus colonies. This breakthrough provides consistent access to amphioxus embryos year-round, advancing vertebrate origin studies.

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Area of Science:

  • * Developmental Biology
  • * Evolutionary Biology
  • * Marine Biology

Background:

  • * Cephalochordates (amphioxus) are crucial for understanding vertebrate origins.
  • * Previous laboratory studies were limited by restricted access to adult amphioxus and their embryonic material.
  • * A consistent and reliable supply of amphioxus is essential for advancing research.

Purpose of the Study:

  • * To design and validate an inland marine facility for establishing stable amphioxus colonies.
  • * To enable year-round and on-demand access to amphioxus embryos for laboratory research.
  • * To overcome limitations of natural breeding cycles and spontaneous spawning in previous setups.

Main Methods:

  • * Mimicking the natural benthic environment, including substrate, day/moonlight cycles.
  • * Implementing a strictly controlled, seasonally fluctuating temperature regimen.
  • * Utilizing supplemented algae diets for gonad replenishment and induced in vitro fertilization.

Main Results:

  • * Successfully established stable, year-round amphioxus colonies in a laboratory setting.
  • * Achieved consistent embryo availability throughout the year, independent of natural conditions.
  • * Eliminated spontaneous spawning, enabling controlled induced breeding and in vitro fertilization.

Conclusions:

  • * The developed inland marine facility effectively overcomes previous limitations in amphioxus research.
  • * Amphioxus can now be reliably maintained and bred in the laboratory, facilitating consistent research.
  • * This system establishes amphioxus as a standard laboratory animal model for studying vertebrate origins.