Reproduction
As an r-selected species, capelin have a high reproductive potential and an intrinsic population growth rate. They reproduce by spawning and their main spawning season occurs in spring, but can extend into the summer. The majority of capelin are three or four years old when they spawn. The males migrate directly to the shallow water of fjords, where spawning will take place, while the females remain in deeper water until they are completely mature. Once the females are mature, they will migrate to the spawning grounds and spawn. This process usually takes place at night. After the females have spawned, they immediately leave the grounds and will potentially spawn again in the following years if they survive. The males do not leave the spawning grounds and will potentially spawn more than once throughout the season. Male capelin are considered to be semelparous because they die soon after the spawning season is over.
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