First, samples of herring at different life stages were collected: juveniles, spawning adults on their respective spawning grounds, and putative mixtures of non-spawning adults from known feeding grounds.
Two to five males go to the spawning grounds first and are with the female throughout the spawning process.
It is still a good spawning ground and a beautiful little river to look at.
It is the spawning ground for many of our fish species.
Incidentally, there is another waterfall higher up the river which it is thought may also stop salmon ascending, but after that there is some quite good spawning ground.
All of these factors have assisted in providing a ready-made spawning ground for a growing array of adventurers.
This area is an important spawning ground, rich in juvenile fish.
The upper part is used as a spawning ground.
