Age and Growth Program

• KASTELLE, C. R., T. E. HELSER, J. L. MCKAY, C. G. JOHNSTON, D. M. ANDERL, M. E. MATTA, and D. G. NICHOL. 2017. Age validation of Pacific cod (Gadus macrocephalus) using high-resolution stable oxygen isotope (δ18O) chronologies in otoliths. Fish. Res. 185:43-53. http://dx.doi.org/10.1016/j.fishres.2016.09.024   Online.
   
• VAN DER SLEEN, P., M. P. DZAUGIS, C. GENTRY, W. P. HALL, V. HAMILTON, T. E. HELSER, M. E. MATTA, C. A. UNDERWOOD, R. ZUERCHER, and B. A. BLACK. 2016. Long-term Bering Sea environmental variability revealed by a centennial-length biochronology of Pacific ocean perch Sebastes alutus. Climate Res. 71:33-45. http://dx.doi.org/10.3354/cr01425   Online.
   
• MATTA, M. E., T. E. HELSER, and B. A. BLACK. 2016. Otolith biochronologies reveal latitudinal differences in growth of Bering Sea yellowfin sole Limanda aspera. Polar Biol. 1-13. http://dx.doi.org/10.1007/s00300-016-1917-y  Online.
   
• COPEMAN, L. A., B. J. LAUREL, K. M. BOSWELL, A. L. SREMBA, K. KLINCK, R. A. HEINTZ, J. J. VOLLENWEIDER, T. E. HELSER, and M. L. SPENCER. 2016. Ontogenetic and spatial variability in trophic biomarkers of juvenile saffron cod (Eleginus gracilis) from the Beaufort, Chukchi and Bering Seas. Polar Biol. 39:1109-1126. http://dx.doi.org/10.1007/s00300-015-1792-y  Online.
   
• KASTELLE, C. R., T. E. HELSER, S. G. WISCHNIOWSKI, T. LOHER, B. J. GOETZ, and L. A. KAUTZI. 2016. Incorporation of bomb-produced 14C into fish otoliths: a novel approach for evaluating age validation and bias with an application to yellowfin sole and northern rockfish. Ecol. Modell. 320:9-91. http://dx.doi.org/:10.1016/j.ecol.2015.09.013.   Online.
   
• MATTA, M. E. 2015. Reproductive biology of the Alaska skate Bathyraja parmifera, with comments on an intersexual individual. J. Fish. Biol. 87:664-678. http://dx.doi.org/10.1111/jfb.12747   Online.
   
• KASTELLE, C. R., T. E. HELSER, J. McKAY, and D. M. ANDERL. 2015. Age Validation of Pacific Cod Using Stable Oxygen Isotope (δ¹⁸O) in Otoliths. AFSC Quarterly Report Feature (April-May-June 2015) 4 p. (.htm pages).  Online.
   
• WISCHNIOWSKI, S. G., C. R. KASTELLE, T. LOHER, and T. E. HELSER. 2015. Incorporation of bomb-produced 14C into fish otoliths. An example of basin-specific rates from the North Pacific Ocean. Can. J. Fish. Aquat. Sci. 72:879-892. DOI: 10.1139/cjfas-2014-0225. 
   
• von BIELA, V., G. KRUSE, F. MUETER, B. BLACK, D. DOUGLAS, T. HELSER, and C. ZIMMERMAN. 2015. Evidence of bottom-up limitations in nearshore marine systems based on otolith proxies of fish growth. Mar. Biol. 162:1019-1031. DOI: 10.1007/s00227-015-2645-5.  
   
• WEST, J. E., T. E. HELSER, and S. M. O’NEILL. 2014. Variation in quillback rockfish (Sebastes maliger) growth patterns from oceanic to inland waters of the Salish Sea. Bull. Mar. Sci. 90:747–761. 
   

• Growth Dynamics Of Arctic And Saffron Cod In The Northern Bering And Chukchi Seas
  By:  THOMAS E. HELSER, DELSA M. ANDERL, CRAIG R. KASTELLE
  Conference:  Ocean Sciences Meeting, New Orleans, LA, Feb 2016
  (2016 poster, .pdf, 4.74 MB)   Online.
   
• Use of Otolith Shape Analysis to Separate Blackspotted (Sebastes melanostictus) and Rougheye Rockfish (Sebastes aleutianus)
  By:  CHARLES HUTCHINSON, JEREMY HARRIS
  Conference:  Western Groundfish Conference (19th), Newport, OR, Feb 2016
  (2016 poster, .pdf, 726 KB)   Online.
   
• Spatial and Temporal Variation in Otolith Elemental Chemistry of Young-of-Year Pacific Cod in the Gulf of Alaska
  By:  MARY ELIZABETH MATTA, JONATHAN SHORT, THOMAS HELSER, OLAV ORMSETH, JESSICA MILLER
  Conference:  Western Groundfish Conference (19th), Newport, OR, Feb 2016
  (2016 poster, .pdf, 896 KB)   Online.
   
• What To Do When Spiny Dogfish Lie About Their Age?
  By:  CINDY A. TRIBUZIO, BETH MATTA, CHRIS GBURSKI, CAL BLOOD, WALLY BUBLEY, GORDON H. KRUSE, WILLIAM BECHTOL
  Conference:  Alaska Marine Science Symposium, Anchorage, AK, Jan 2015
  (2015 poster, .pdf, 3.1 MB)   Online.
   
• Modeling Environmental Factors Affecting Assimilation of Bomb-produced ?14C in the North Pacific Ocean: Implications for Age Validation Studies
  By:  THOMAS E. HELSER, CRAIG R. KASTELLE, HAN-LIN LAI
  Conference:  International Otolith Symposium (5th), Mallorca, Spain, Oct 2014
  (2014 poster, .pdf, 1.46 MB)   Online.
   
• A 200 Year Archeozoological Record of Pacific Cod Life History as Revealed Through Ion Microprobe Oxygen Isotope Ratios in Otoliths
  By:  THOMAS HELSER, CRAIG KASTELLE, JOHN VALLEY, ARON L. CROWELL, IAN ORLAND, REINHARD KOZDON, TAKAYUKI USHIKUBO
  Conference:  ICES Annual Science Conference, Coruna, Spain, Sept 2014
  (2014 poster, .pdf, 1.4 MB)   Online.
   
• Age Validation of Pacific Cod (Gadus macrocephalus) Using Stable Oxygen Isotopes (d 18O) (2014 poster)
  By:  CRAIG KASTELLE, THOMAS HELSER, JENNIFER McKAY, DELSA ANDERL
  Conference:  Western Groundfish Conference (18th), Victoria, B.C., Feb 2014
  (2014 poster, .pdf, 4.04 MB)   Online.
   
• Re-inventing the Wheel Has its Challenges: Investigating New Methods for Aging Spiny Dogfish
  By:  CINDY A. TRIBUZIO, CAL BLOOD, BETH MATTA, CHRIS GBURSKI, WALLY BUBLEY, GORDON H. KRUSE
  Conference:  Alaska Marine Science Symposium, Anchorage, AK, Jan 2014
  (2014 poster, .pdf, 8.8 MB)   Online.
   
• Age Validation of Pacific Cod (Gadus macrocephalus) Using Stable Oxygen Isotopes (d 18O)) (2013 poster)
  By:  CRAIG KASTELLE, THOMAS HELSER, JENNIFER McKAY, DELSA ANDERL
  Conference:  Alaska Marine Science Symposium, Anchorage, AK, Jan 2013
  (2013 poster, .pdf, 2.66 MB)   Online.
   
• Preliminary Life History Variability of Longnose Skate (Raja rhina) Across Two Large Marine Ecosystems: Gulf of Alaska and California Current System
  By:  CHRISTOPHER GBURSKI, THOMAS HELSER, VLADLENA GERTSEVA, JACQUELYNNE KING, DAVID EBERT
  Conference:  Western Groundfish Conference (17th), Seattle, WA., Feb 2012
  (2012 poster, .pdf, 2.5 MB)   Online.
   

See the publications and poster databases for additional listings.