One of the reasons for the even-odd cycle in Chinook escapements is that the surveyor's ability to see Chinook redds is compromised by the presence of pinks. Time and again surveyors have told me that the presence of all the pinks, and this was back in the 80s, makes Chinook harder to see, much less count.

As the South Prairie pinks have exploded, it has become more and more fifficult to even see the Chinook and redds.

Not saying that the number may not show an impact to fishing mortality; release or unreported.

Also, there was a strong even-odd cycle on PS coho that seemed to be tied to bycatch in the Fraser pink fisheries. They ran later in the fall, when some of the coho were coming in. Even if they were noit taken in US waters they would be picked up in the Canadian fisheries.