Spawning takes place in summer, the season extending from June to October.
There is reason to believe that these young herrings are derived from a local "winter" race spawning about February and March, and having nothing to do with the great shoals of the more open sea spawning in the North Sea in November.
It is in better condition at the beginning of winter than after the spawning season, which falls in the months of February and March.
Yet in this area, according to the investigations of Mr Williamson (Report of the Scottish Fishery Board for 1898), nearly 500 millions of plaice eggs are naturally produced in one spawning season.
Such property right should undoubtedly be extended to natural beds, or else an area of natural spawning territory, should be kept under constant control and surveillance by government, for the purpose of maintaining an adequate supply of seed oysters.