It is generally assumed that spawning
occurs in the autumn on Georges Bank, although semiannual spawning
has been observed on the Northeast Peak (DiBacco et al.
Post-spawn bass also turn their attention to the spawning
beds of other fish.
To examine whether or not age and size effects on spawning
duration and frequency were common, we reviewed scientific literature on fishes, including aquaculture studies that investigated natural spawning
(nonhormonally induced), as well as field studies.
SPAWN estimates that 31 percent of spawning
in the whole watershed occurs here, and at least 40 percent of the creek's Coho rear in the area.
Although the timing and location of barred sand bass spawning
aggregations in southern California is well-documented, little else is known about their spawning
As the perchlorate concentration climbed from 30 to 100 ppm, successful spawning
fell from 50 percent to zero.
Each of the five breeds peak during different parts of the spawning
season, from early July through late October.
He said: "Because it has been so cold, the fish, particularly bream, that would normally spawn at this time of year, will be spawning
a lot later.
They conclude that more information about the effects of endocrine disruptors on the interactions between fish in a spawning
group is needed before the population-level effects of endocrine disruption can be understood.
the fish are weak and if they are to survive to spawn again they must be handled very carefully so that they do not become damaged or stressed.
and nursery habitat for shad could produce 133,000 of that great game and food fish annually.
During the mid-1990s, anglers reported large numbers of walleye (Stizostedton vitreum) in spawning
condition concentrated on shallow points adjacent to the Maumee River channel during spring.