Euphausia pacifica and other euphausiids in the coastal waters of British Columbia: relationships to temperature, salinity and other properties in the field and laboratory ...

• Main Author: Regan, Lance
• Format: Text
• Language: English
• Published: University of British Columbia 2011
• Subjects: Thysanoessa raschii
• Online Access: https://dx.doi.org/10.14288/1.0302519; https://doi.library.ubc.ca/10.14288/1.0302519

During 1960-61 the abundance and distributions of four species of euphausiids (Euphausia pacifica Hansen, Thysanoessa spinifera Holmes, Thysanoessa longipes Brandt and Thysanoessa raschii M. Sars) and the developmental stages of one species, E. pacifica were studied each month in relation to temperature and salinity in Indian Arm, British Columbia, using the method of T-S-P diagrams. Euphausia pacifica probably is a resident species and as such was the most tolerant towards environmental conditions and their fluctuations in Indian Arm, followed in order of decreasing tolerance by the expatriate species T. spinifera, T. longipes and T. raschii. All species, (whether resident or expatriates), were useful biological indicators of oceanographic changes in Indian Arm, particularly with reference to the detection of outside waters entering the inlet. Field data indicated that temperature and salinity may have been contributory "regulatory factors" with regard to the vertical distribution of euphausiids in Indian ...