From the point of view of fishery management, information from computations of the kinds described in this Bulletin provide only a part of the basic information upon which policy can be based. Sometimes, to be sure, they can provide the greater part of the necessary information. This is particularly true where several species are possible occupants of and competitors for an important environment, and their relative abundance may vary with the intensity for the fishery or with physical changes. This Bulletin is of course not intended as a complete text book for fishery biologists. Methods of measuring fish, determining their age, marking, tagging, collecting, and tabulating catch statistics--all these are mentioned only incidentally, although they provide the data from which the vital statistics of a stock must be estimated.
"synopsis" may belong to another edition of this title.
Seller: ThriftBooks-Dallas, Dallas, TX, U.S.A.
Hardcover. Condition: Fair. No Jacket. Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less. Seller Inventory # G0662014405I5N00
Seller: ThriftBooks-Dallas, Dallas, TX, U.S.A.
Hardcover. Condition: Fair. No Jacket. Missing dust jacket; Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less. Seller Inventory # G0662014405I5N01
Seller: Blue Vase Books, Interlochen, MI, U.S.A.
Condition: acceptable. The item is very worn but is perfectly usable. Signs of wear can include aesthetic issues such as scratches, dents, worn and creased covers, folded page corners and minor liquid stains. All pages and the cover are intact, but the dust cover may be missing. Pages may include moderate to heavy amount of notes and highlighting, but the text is not obscured or unreadable. Page edges may have foxing age related spots and browning . May NOT include discs, access code or other supplemental materials. Seller Inventory # BVV.0662014405.A
Seller: Better World Books: West, Reno, NV, U.S.A.
Condition: Very Good. Reprint. Pages intact with possible writing/highlighting. Binding strong with minor wear. Dust jackets/supplements may not be included. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good. Seller Inventory # 57967708-75
Seller: The Book Bin, Salem, OR, U.S.A.
Hardcover. Condition: Very Good. No jacket, as issued. Teal and white cloth, very good with light rubbing and edgewear. Spine square. Binding sound. Prior owner's name penned to first page. Interior else clean, text bright and unmarked. Seller Inventory # BBS-2024673