Moulting and body shrinkage in the Antarctic krill, Euphausia superba

• Other Authors: AIMS Data Centre (distributor), AIMS Data Centre (pointOfContact), Australian Institute of Marine Science (AIMS) (hasAssociationWith), Data Manager, AIMS Data Centre (pointOfContact), Ikeda, Tsutomu, Dr (hasPrincipalInvestigator)
• Format: Dataset
• Language: unknown
• Published: Australian Ocean Data Network
• Subjects: oceans; Antarc*; Antarctic; Antarctic Krill; Antarctic Ocean; Euphausia superba
• Online Access: https://researchdata.edu.au/moulting-body-shrinkage-euphausia-superba/691191

Maintenance and Update Frequency: notPlanned Statement: Statement: The exopodite length (x mm) was converted to the body length (the tip of rostrum to the distal end of telson, yL, mm) or body weight (wet weight, yW, mg) by using the following equations:yL=2.646+7.360x (r=0.980,n=67)andlogyW=-2.614+2.885logx (r=0.986,n=23)These relationships were established on preserved and fresh specimens of Euphausia superba of various sizes, respectively.The water bottle method used to collect samples for determination of rates of oxygen uptake, ammonia excretion, inorganic phosphate excretion, dissolved organic nitrogen (DON) excretion, dissolved organic phosphate (DOP) excretion is described in: Ikeda, T (1974) Nutritional ecology of marine zooplankton. Mem. Fac. Fish., Hokkaido Univ., Vol. 22, pp. 1-97.The methods used for the determination of dissolved oxygen, ammonia, inorganic phosphate, DON and DOP are described in:Strickland, JDH and Parsons, TR (1972) A practical handbook of seawater analysis. Bull. Fish. Res. Board Can., No. 167, 310 pp. Credit Ikeda, Tsutomu, Dr (Principal Investigator) Euphausia superba were collected from the Antarctic Ocean during the cruise by RV Kaiyo-Maru in January 1980, and were transported to the Australian Institute of Marine Science laboratories at Townsville in February 1980.Specimens of Euphausia superba were maintained in a cold room at -0.5°C (0 to -1.0°C) under continuous subdued light (Specimens were checked daily for moults, which were then preserved with a few drops of buffered formalin (40%) in seawater. The exopodite length of the moult uropod was later measured. Changes in body wet weight or length were then tracked by applying allometric equations derived from specimens sacrificed at the end of experiments. Preserved moults were later rinsed in distilled water to remove formalin and salts, and were dried in a desiccator over silica gel at room temperature to obtain dry weights. Fresh moults, collected from stock specimens were used for analysis of carbon and nitrogen ...