Territoriality and reproductive behaviour in the goldsinny, Ctenolabrus rupestris L

Territoriality and reproductive behaviour of the Goldsinny, Ctenolabrus rupestris, was studied in the waters around Tjärnö on the Swedish west coast. Observations were made by SCUBA-diving and from an observation raft and in aquaria. Patrolling, foraging, courtship and aggression were defined and quantified throughout the reproductive season and after. Spawning activity was also examined and it has been found that one male spawns with several females. During spawning accesory males may be present at fertilisation and their role is discussed. Both sinking and floating eggs were recorded, which are discussed. After spawning some females became territorial as well as some subadults. The territories showed a consistency according to their boundaries and occupants from year to year.