Scientia Marina, Vol 68, No 4 (2004)

A pressurising system for long-term study of marine or freshwater organisms enabling the simulation of cyclic vertical migrations


https://doi.org/10.3989/scimar.2004.68n4615

Alfredo Damasceno-Oliveira
Laboratório de Ecofisiologia, Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Universidade do Porto - nstituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto

José Gonçalves
Laboratório de Ecofisiologia, Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Universidade do Porto - nstituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto

Joao Silva
Instituto Superior de Engenharia do Porto (ISEP)

Begoña Fernández-Durán
Laboratório de Ecofisiologia, Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Universidade do Porto

Joao Coimbra
Laboratório de Ecofisiologia, Centro Interdisciplinar de Investigação Marinha e Ambiental (CIIMAR), Universidade do Porto - nstituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do Porto

Abstract


A computer-controlled pressurising system enabling large aquatic organisms like marine fishes to be maintained for long periods is described. The paper presents a system that is capable not only of maintaining constant hydrostatic pressures but also of producing any desired cyclic variations of that parameter, allowing the close and reliable simulation of vertical migrations that many species of fishes and other aquatic animals perform during some stages of their life cycles.

Keywords


hydrostatic pressure; vertical movements; semi-diurnal cycle; fish behaviour; flounder

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