Björn Th Björnsson

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We have examined the interaction of photoperiod and temperature in regulating the parr-smolt transformation and its endocrine control. Atlantic salmon juveniles were reared at a constant temperature of 10 degrees C or ambient temperature (2 degrees C from January to April followed by seasonal increase) under simulated natural day length. At 10 degrees C, an(More)
The present study compares developmental changes in plasma levels of growth hormone (GH), insulin-like growth factor I (IGF-I) and cortisol, and mRNA levels of their receptors and the prolactin receptor (PRLR) in the gill of anadromous and landlocked Atlantic salmon during the spring parr-smolt transformation (smoltification) period and following four days(More)
High-affinity, low-capacity estradiol-17beta (E(2)) binding is present in rainbow trout scale. The K(d) and B(max) of the scale E(2) binding are similar to those of the liver E(2) receptor (K(d) is 1.6 +/- 0.1 and 1.4 +/- 0.1 nM, and B(max) is 9.1 +/- 1.2 and 23. 1 +/- 2.2 fmol x mg protein(-1), for scale and liver, respectively), but different from those(More)
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