MATURE MALES OF ARCTIC CHARR, SALVELINUS-ALPINUS, RELEASE F-TYPE PROSTAGLANDINS TO ATTRACT CONSPECIFIC MATURE FEMALES AND STIMULATE THEIR SPAWNING BEHAVIOR

T SVEINSSON, TJ HARA

Research output: Contribution to journalArticlepeer-review

Abstract

We examined the behavioural and biological functions of prostaglandins (PG) of F-type as a chemosensory signal during spawning in Arctic charr. Immunoassay revealed F-type PGs in water inhabited by ripe charr of both sexes performing spawning-related acts. High concentrations of immunoreactive PGFs seemed to coincide with male spawning activity. Ripe isolated males were more odorous to other charr (as assayed by EOG) than either females or immature charr. When these males received chemical cues from ovulated females, they increased their release of odorants, including F-type PGs, into the water. PGF at concentrations of 0.1 nM attracted ovulated females and ripe males. It also stimulated digging behaviour in mature females. It is concluded that F-type PGs or their derivatives are released by ripe males on the spawning grounds to attract females and elicit their spawning behaviour.

Original languageEnglish
Pages (from-to)253-266
Number of pages14
JournalEnvironmental Biology of Fishes
Volume42
Issue number3
DOIs
Publication statusPublished - Mar 1995

Other keywords

  • Fishes
  • Pheromone
  • Salmonids
  • Spawning

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