To give bike frames their structural strength manufacturers employ a variety of unidirectional carbon fiber prepreg sheets. Each sheet is designated by the fiber orientation as being either a 0Â°, a plus 45Â°, a minus 45Â°, and/or a plus or minus 30Â°.
Sawfish are shark-like rays characterized by long, tooth-studded snouts. Individuals range in size from 2 to 20 feet and can weigh more than 1,000 pounds. Like most sharks and rays, sawfish are exceptionally vulnerable to overexploitation due to their slow growth, late maturity, and small number of young. All seven species worldwide are classified by the International Union for Conservation of Nature (IUCN) as Critically Endangered.
Mature sawfish have occasionally been found in deeper ocean waters. A sawfishâs gestation period is believed to be about five months, and that females reprocuce every other year. There may be four to ten sawfish in a litter. The number of rostral teeth is fixed during development. The rostral teeth are formed, somewhat flexible, and covered by a thin membrane, but harden upon birth.