backResearcher Profile

John "Jorgen" O.T. Jensen

Job Title: Research Biologist
Employer: Fisheries and Oceans Canada
Place of Birth: Svendborg, Denmark
Public School attended: Second Street Elementary St., Burnaby, BC
High School attended: Cariboo Hill and Burnaby Central Secondary schools, Burnaby, BC
Further Education: Simon Fraser University (B.Sc.), University of Washington (Ph.D.).
Geographic focus of research: British Columbia

Brief synopsis of current research:
I have focused research mainly on the early life history of teleost fish (e.g. Pacific salmonids and more recently Pacific halibut and sablefish), with emphasis on factors (i.e. water quality parameters and fish-culture techniques) that influence egg fertilization, embryonic development, larval growth, and survival. Research has encompassed such areas as:
1. Short-term egg and sperm storage
2. Mechanical shock sensitivity of eggs
3. Measurement of hydrostatic pressure of salmonid eggs, including the influence of low pH
4. The influence of temperature on egg and larval development, including modelling embryonic and larval development rates, which have been included in computer programs (i.e. SIRP and IncubWin) that can be found on the Web site listed below.
5. The influence of excess total gas pressure (Gas Supersaturation) on salmonids
6. Development of incubation systems for marine eggs and larvae

Mailing address:
Pacific Biological Station, Nanaimo, BC V9R 5K6
Phone: (250) 756-7013; Fax: (250) 756-7053
E-mail:
jensenj@pac.dfo-mpo.gc.ca
Websites:
www.pac.dfo-mpo.gc.ca/aqua/profiles/jensen.htm
www-sci.pac.dfo-mpo.gc.ca/aqua/sirp/incubwin.htm

Recent Publications:

Jensen, J.O.T. and D.F. Alderdice. 1989. Comparison of mechanical shock sensitivity of eggs of five Pacific salmon (Oncorhynchus) species and steelhead trout (Salmo gairdneri). Aquaculture 78: 163-181.

McFarlane, G. A., J.O.T. Jensen, W.T. Andrews, and E.P. Groot. 1991. Egg and yolk sac larval development of Pacific halibut (Hippoglossus stenolepis). Int. Pac. Halibut Comm. Tech. Rep. 9: 22 p.

Jensen, J.O.T., W.E. McLean, P.J. Rombough, and T.Septav. 1992. Salmonid incubation and rearing programs for IBM-compatible computers. Can. Tech. Rep. Fish. Aquat. Sci. 1878:46 p.

Newcombe, C.P. and J.O.T. Jensen. 1996 Channel suspended sediment and fisheries: A synthesis for quantitative assessment of risk and impact. North Amer. J. Fish. Man. 16: 693-727.

Billard, R and J.O.T. Jensen. 1996. Gamete removal, fertilization and incubation. In Principles of salmonid culture. Eds. W. Pennell and B.A. Barton, Elsevier publ. :291-364.