Gilfillan, E.S., J.H. Vandermeulen & S. Hanson. (1986). Feeding, respiration and excretion of the copepod Calanus hyperboreus from Baffin Bay, including waters contaminated by oil seeps. Arctic. 39(2):158-163. (French summary).

88703

Gilfillan, E.S., J.H. Vandermeulen & S. Hanson

1986

39(2):158-163. (French summary)

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Metabolic processes in eastern arctic copepodCsulunus hyperboreuswere analyzed duringthe post-bloom period(August-September). Mixedadultandsubadultcopepodswerecollectedfrom12stationsinBaffinBay(DavisStraittoLancaster Sound)by trawlingfrom 0-300m. Measurements weremade ofclearancerate, 02-consumption andNH3excretion.The cruisetrack included6 stationsin oil-seepcontaminated waters of Scott Inlet and Buchan Gulf. Physiological parameters for populations of C . hyperboreus from the latter stations were compared with those from non-seep stations. MeanOzconsumption rates(0.309-0.907pl02.mgdry wt".h-')forallstations were similar to those descfriobreAdntarctic calanoid speciebsut were higher than reported from more northern arctic waters. Mean ammonia excretion(0r.a0t2es3-0.071 pgN.mg dry wt".h") were somewhat lower than reported for comparable Antarctic speacnieds were similar to values from other easternstaurdctiiecs.O:Nratios for11of the 12 stations occupied ranged between8.4and22.1,indicativeofprotein-based metabolism. The single exceptwioansaHigh Arctic station wiOth:Nratio43.6.Clearance rates were low to nonexistentfor all stations. Most of the non-feeding values came from the Scott Inlet-Buchan Gulfofrwegeisotnern Baffin BayA. t those stationsin this regiona strong negative correlation(P<.01)exists between clearance rate and hydrocarbon contamination. This suggests that in the oil-soefeBpafrefignioBnayfeedingmay be suppressedin Culunus hyperboreusby low concentrationsof petroleum hydrocarbons derived from sub-sea seepage. Key words: zooplankton, Culunus hyperboreus, Arctic, metabolism, oil seep, petroleum, hydrocarbons, oil pollution

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