Birgitta Norberg

TL;DR: Puberty comprises the transition from an immature juvenile to a mature adult state of the reproductive system, i.e. the individual becomes capable of reproducing sexually for the first time, which implies functional competence of the brain-pituitary-gonad (BPG) axis.

TL;DR: The present status on the male teleost BPG axis, with an emphasis on flatfish, is reviewed, and some entirely new information on the phylogeny and molecular structure of teleost gonadotropins is presented.

TL;DR: High plasma levels of steroids in male and female cod during spawning serve to promote further development and growth of less advanced stages of germ cells.

TL;DR: Results demonstrate that manipulation of the annual photoperiod cycle is a powerful hatchery technique in the maintenance of reproductive stocks of Atlantic cod that spawn at various times of the year.

TL;DR: Female brown trout from a wild strain and a cultured strain were sampled individually for blood plasma at regular intervals during the period around final sexual maturation, finding discrepancies observed between wild and cultured females may be due to differences in stress susceptibility, environmental conditions, life cycles, or to genetic divergence between the strains.