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Table 1.

The effects of chronic exposure to environmental salinity on the ultrastructure of the secretory cells in the lingual salt glands of juvenile freshwater- and saltwater-acclimated C. porosus

Ultrastructual measurementFW-acclimated groupSW-acclimated groupP value
Volume density of mitochondria (μm3 μm–30.0736±0.00543 0.0908±0.00193 0.024* 
Volume density of intercellular space (μm3μm–30.0544±0.00573 0.0611±0.009 0.546 
Surface density of plasma membrane (μm2μm–31.0580±0.0809 1.1260±0.1570 0.714 
Number of cell nuclei per μm2 0.0054±0.0007 0.00356±0.00024 0.046* 
Ultrastructual measurementFW-acclimated groupSW-acclimated groupP value
Volume density of mitochondria (μm3 μm–30.0736±0.00543 0.0908±0.00193 0.024* 
Volume density of intercellular space (μm3μm–30.0544±0.00573 0.0611±0.009 0.546 
Surface density of plasma membrane (μm2μm–31.0580±0.0809 1.1260±0.1570 0.714 
Number of cell nuclei per μm2 0.0054±0.0007 0.00356±0.00024 0.046* 

Values are means ± s.e.m. (N=4). *Significant difference between treatments (P<0.05)

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