1. NASA SeaWiFS Dynamics of Calanus finmarchicus Resting Populations in the Gulf of Maine Whitley Saumweber University of Rhode Island Graduate School of Oceanography

2. Stage C5 Calanus finmarchicus

4. Two Survivorship Models Ingvarsdottir et al (1999) Z = Wt Specific Respiration C t = Total Carbon Weight C t = C o e (ln(1-z)*t) 70% Total C is Storage C Death occurs at C t /C o = 0.3 No inclusion of C reserve for spring molt or reproduction Two Respiration Models for C. finmarchicus at 5ºC Miller C t+1 = C t -(Z*C s ) 70% Total C is Storage C Death occurs at C t /C o = 0.3 No inclusion of C reserve for spring molt or reproduction

5. Station KeyAbr.#Depth June CruiseC1 August CruiseC2 Slope WaterSWS1 Northeast ChannelNECS2 Scotian ShelfSSS3 Georges BasinGBS4 Jordan BasinJBS5 Wilikinson BasinWBS6 Shallow NetN30-100m Deep NetN1 150m- Bottom Longitude (W) Latitude (N) Cruise Stations, June 2001 – August 2001

6. Copepod Weight (Nitrogen) Nitrogen Specific Respiration Initial Weight of Lipid Reserves (Carbon), Miller et al. 1998 t = time (days) “Death” occurs when Maximum Possible Weight of Lipid Reserves

7. Prosome PL = 2.4mm Urosome Stage C5 Calanus finmarchicus Prosome Length

8. A SL Stage C5 Calanus finmarchicus Cylindrical Approximation OSV = (SLπD 2 )/4 D = A/SL Oil Sac Volume

10. Copepod Weight (Nitrogen) Nitrogen Specific Respiration Initial Weight of Lipid Reserves (Carbon), Miller et al. 1998 t = time (days) “Death” occurs when Maximum Possible Weight of Lipid Reserves

12. Copepod Weight (Nitrogen) Nitrogen Specific Respiration Initial Weight of Lipid Reserves (Carbon), Miller et al. 1998 t = time (days) “Death” occurs when Maximum Possible Weight of Lipid Reserves

13. The Gulf of Maine Latitude (N) Longitude (W)

14. MOCNESSJohnson Sea Link II

15. Incubation Methods At Sea: Winkler Titration 5 Sample Bottles 2 Control Bottles Incubate in the Dark At In Situ Temp. 24 – 48 Hrs Fix Sample and Titrate Animals Picked For Exp. Immediately After Capture 30 Animals/Bottle 1 Animal/10ml On Shore: MicroOxymax Gas Analyzer Animals Kept in Culture on Shore At 12 animals/L Allowed to acclimate to Exp. Temp For 48 Hrs 6 Sample Bottles 4 Control Bottles Incubated for 48 Hrs Head Space Sampled Every 12Hrs Animals Picked For Exp. 10 Animals/Bottle 1 Animal/10ml

18. Copepod Weight (Nitrogen) Nitrogen Specific Respiration Initial Weight of Lipid Reserves (Carbon), Miller et al. 1998 t = time (days) “Death” occurs when Maximum Possible Weight of Lipid Reserves

24. Summary J A new Nitrogen Specific Respiration Model has been developed for diapausing stage C5 C. finmarchicus. J The Model predicts a maximum survival time of four to five months for animals resting in the Western Gulf of Maine. J Application of the model to animals observed during the summer of 2001 suggests that significant mortality accrues by August. JPredicted mortality is lower in Jordan than in Wilkinson Basin because animals in Jordan Basin had relatively more lipid reserves. JSummer mortality is more than offset by large additions to the resting population of smaller, and presumably younger, animals.

25. NASA SeaWiFS Acknowledgements: Ted Durbin Maria Casas Bob Campbell Mary-Lynn Dickson Marsh Youngbluth

26. Where d and c represent components of functions for R and N Model Solution

31. The Gulf of Maine Latitude (N) Longitude (W)