Instead of a distinct spawning episode , their spawning is a continuous event that the eggs are released over time .
Multiple spawning events of a female P. colias occur throughout late winter and spring in the centre to the outer continental shelf .
Instead of a distinct spawning episode , P. colias ' spawning is a continuous event that the eggs are released over time .
Multiple spawning events of a female P. colias occur throughout late winter and spring in the centre to the outer continental shelf .