A new hydrostatic pressure apparatus for studies of marine zooplankton

Tomoko Yoshiki, Tatsuki Toda, Teruaki Yoshida, Akio Shimizu

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A new design of hydrostatic pressure apparatus for studying marine zooplankton is described. Zooplankton occur throughout the water column and are exposed to a range of hydrostatic pressures throughout their lifetime. The hydrostatic pressure apparatus developed in this study makes it possible to (i) increase pressure gradually from 1 to 200 atm, (ii) prevent corrosion of the pressure chamber by introducing a specimen holder that separates the pressure chamber from the surrounding seawater, and (iii) observe a wide size range of zooplankton including eggs (100-10 000 μm size range). The new apparatus is useful for the study of mesozooplankton throughout their life history from egg to adult. The effects of hydrostatic pressure on the eggs of the calanoid copepod, Calanus sinicus, were examined using the new hydrostatic pressure apparatus. Hydrostatic pressure did not affect C. sinicus egg development time, but egg-hatching success decreased significantly with increasing pressure. Most of the nauplii that hatched under high-pressure conditions (10, 50, and 100 atm) were deformed. Eggs of C. sinicus did tolerate pressures of 10 atm. This implies that eggs would not survive if they did not hatch within the upper 100 m.

Original languageEnglish
Pages (from-to)563-570
Number of pages8
JournalJournal of Plankton Research
Volume28
Issue number6
DOIs
Publication statusPublished - Jun 2006
Externally publishedYes

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hydrostatic pressure
zooplankton
egg
range size
egg development
hatching
corrosion
life history
water column
seawater
Calanus
nauplii
Copepoda

ASJC Scopus subject areas

  • Aquatic Science

Cite this

A new hydrostatic pressure apparatus for studies of marine zooplankton. / Yoshiki, Tomoko; Toda, Tatsuki; Yoshida, Teruaki; Shimizu, Akio.

In: Journal of Plankton Research, Vol. 28, No. 6, 06.2006, p. 563-570.

Research output: Contribution to journalArticle

Yoshiki, Tomoko ; Toda, Tatsuki ; Yoshida, Teruaki ; Shimizu, Akio. / A new hydrostatic pressure apparatus for studies of marine zooplankton. In: Journal of Plankton Research. 2006 ; Vol. 28, No. 6. pp. 563-570.
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