New PDF release: Smiths’ Sea Fishes
By J. L. B Smith, Margaret M. Smith, Phillip C. Heemstra
A reprinted variation of a piece at the sea fishes of Southern Africa, containing new species descriptions and additions and corrections to the textual content.
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Extra resources for Smiths’ Sea Fishes
B. Smith's book The Sea Fishes of Southern Africa, which is entered in our synonymies as "Smith, SFSA No. ___ ", which denotes the species number used in that book. A sample of a synonymy used in the present book, with a few additional notes of explanation, is as follows: Cheimerius nufar (Valenciennes, 1830) Dentex nufar Valenciennes, in Cuv. , 1830: 240 (Red Sea). Dentex variabilis Valenciennes, in Cuv. , 1830: 241 (Red Sea). Dentex miles Gilchrist & Thompson, 1908: 155 (Natal). Dentex a/bus Gilchrist & Thompson, 1914: 128, Fig.
These two quite unrelated species occupy the same habitat at the Comores, and they apparently make considerable depth changes in their search for the same prey. Sharks (and other chondrichthyes) lack a swimbladder, but they also produce large amounts of lipid to provide buoyancy. The lipid is stored in the liver as oil (mainly squalene, a very low-density oil that incidentally also makes an excellent lubricant for fine machinery). The livers of some sharks are enormous - up to 25 per cent of the total weight!
There have been numerous reports of high waves off the east coast. Wave heights as large as 20 m can occur when gale-force southwesterly winds drive huge seas against the south-flowing Agulhas Current. The region from Port Elizabeth to Cape Agulhas, where the Agulhas Current slowly leaves the coast, is one of large variability. Since the Agulhas Current steers away from the coastline and follows the edge of the Agulhas Bank, the water movements on the Agulhas Bank are less affected by the Agulhas Current than areas close to shore such as near East London.
Smiths’ Sea Fishes by J. L. B Smith, Margaret M. Smith, Phillip C. Heemstra