Where (t) can be any age, refers to fish that are between age (t) and (t+1).
AGE (T+)
Meaning of AGE (T+) in English
Fishery English glossary. Английский глоссарий рыболовства . 2012
Where (t) can be any age, refers to fish that are between age (t) and (t+1).
Fishery English glossary. Английский глоссарий рыболовства . 2012