English to Spanish Science Environment & Ecology

sé que slide es portaobjetos pero ¿aplica en este caso?

Phytoplankton were identified and enumerated by IMARPE scientists. Phytoplankton subsamples were processed using settling chambers ***to produce permanent slides***. The slides were examined under phase contrast illumination at 500x magnification and individual cells were identified and enumerated. Phytoplankton densities were expressed as numbers of cells per liter of seawater.
Zooplankton were identified and enumerated by xxx scientists. Zooplankton subsamples were examined in the lab with a dissecting microscope using phase contrast illumination. Individual organisms were identified and enumerated. The original zooplankton numbers provided by xxx were expressed as numbers of animals per sample.