Chinook salmon successful at guarding their redds. Chinook eggs hatch, 90 to 150 days after deposition, depending upon water temperature. Egg deposits are timed to ensure the young salmon fry emerge during an appropriate season for survival and growth. Fry and parr (young fish) usually stay in fresh water 12 to 18 months before traveling downstream to estuaries, where they remain as smolts for several months. Some Chinooks return to the fresh water one or two years earlier than their counterparts, and are referred to as "jack" salmon. "Jack" salmon are typically less than long, but are sexually mature and return at
The Salmon of Doubt The Salmon of Doubt The Salmon of Doubt: Hitchhiking the Galaxy One Last Time is a posthumous collection of previously published and unpublished material by Douglas Adams. It consists largely of essays about technology and life experiences, but its major selling point is the inclusion of the incomplete novel on which Adams was working at the time of his death, "The Salmon of Doubt" (from which the collection gets its title, a reference to the Irish myth of the Salmon of Knowledge). English editions of the book were published in the United States and UK in May 2002, exactly one