The information below represents a brief history of the ageing of groundfish species at the Alaska Fisheries Science Center. The coefficient of variation provides a very rough indication of the difficulty age readers have in producing precise ages. However, it should be kept in mind that the experience level of the age readers will also have a significant influence on the precision of the ages being generated.
The history categories themselves provides a combination of our overall experience in ageing a particular species as it relates to volume, corroborative information, and difficulties that have been encountered. The history category does not express the actual difficulty of the different species but instead provides a crude history summary that can be compared across species.
A planktonic organism called a sea butterfly. This one is covered with some gelatinous organisms.
Harmony Wayner, Betty Bonin and Rhonda Wayner represent 3 generations of fisherwomen in Naknek.
Kitty Sopow presents a seagull egg she gathered.