Life history of Milnesium tardigradum Doyère (Tardigrada) under a rearing environment

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

A strain of carnivorous tardigrade, Milnesium tardigradum, was reared in water on agar plates at 25°C. The monogonont rotifer Lecane inermis was presented as a food source. This rearing system permitted detailed observation of tardigrade behaviour. Daily measurements of body length allowed the growth rate and moulting cycle of this species to be determined. The life history of M. tardigradum raised under these conditions included up to seven periods of moult. The first and second moults occurred at intervals of 4-5 days, and individuals reached reproductive maturity at the 3rd-instar stage; the first period of egg laying accompanied the third moult. The most rapidly developing animal in the study population laid eggs 12 days after hatching. The egg-laying intervals or moulting intervals of adult animals were around 6-10 days. The mean clutch size was 6.9 eggs. All tardigrades in this laboratory population were female and reproduced by parthenogenesis. The duration of the embryonic stage ranged from 5-16 days. The most long-lived female survived for 58 days after hatching, and laid a total of 41 eggs in 5 separate clutches. The entire life cycle of tardigrades reared under these conditions was recorded and photographed. A brief description of the embryonic development of M. tardigradum was also reported.

Original languageEnglish
Pages (from-to)49-57
Number of pages9
JournalZoological Science
Volume20
Issue number1
DOIs
Publication statusPublished - 2003 Jan 1

Fingerprint

Tardigrada
rearing
life history
molting
oviposition
hatching
parthenogenesis
sexual maturity
clutch size
Rotifera
body length
life cycle (organisms)
embryogenesis
instars
agar
duration

Keywords

  • Embryology
  • Life history
  • Milnesium
  • Rearing
  • Tardigrade

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Life history of Milnesium tardigradum Doyère (Tardigrada) under a rearing environment. / Suzuki, Atsushi C.

In: Zoological Science, Vol. 20, No. 1, 01.01.2003, p. 49-57.

Research output: Contribution to journalArticle

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