By Michael N. Bruton (auth.), Michael N. Bruton (eds.)
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The convention was once geared up via the Institute of data concept and Automation of the Czechoslovak Academy of Sciences from July 7 - eleven, 1986, in Prague. The around variety of the convention used to be just one of the jubilees attached with its association. particularly, thirty years of the Prague meetings (the first one used to be prepared in autumn 1956 in Liblice close to Prague), and anniversaries of Professor Anton1n Spacek, the inspirator and primary organizer of the Prague meetings - seventy five years of his start and 25 years of his premature loss of life.
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Pp. 181-191. G . G. S. A. ) Predators and Prey in Fishes, Dr W. Junk Publishers, The Hague. T. B . Schaller. 1982. Preliminary study of some vegetation types of the Pantanal, Mato Grosso, Brazil. Brittonia 34: 228-251. J . 1984. The feeding behaviour of a cleaner and scale, skin and fin eater from Lake Malawi (Docimodus evelynae; Pisces, Cichlidae). Neth. J. Zool. 34: 182-196. A. e. e. J. Sharp. 1983. A preliminary survey of the cichlid fishes of rocky habitats in Lake Malawi. S. Afr. J. Zool. 18: 149-310.
Chondrichthyes - - - - - - - ' 855 spp. Fig. 5. Relative numbers of species in various major groups of marine vertebrates. The top pie graph compares all major groups, with agnathan and tetrapod classes in aggregate. The bottom graph compares cartilaginous fishes to agnathans and to classes of marine tetrapods. Numbers are minimum figures, with sources indicated in the text. a liability to newborn young or to eggs as potential cannibals, and the young may show habitat selection behavior that helps them to avoid conspecific predators as well as other species of predatory sharks.
Lampreys appeared in the Carboniferous. The 72 species of living lampreys and hagfishes are a shadow of the former diversity of jawless fishes, and are minor participants in marine ecosystems today. The class Placodermi was the most diverse group of gnathostome fishes and of vertebrates during the Devonian, with numerous species, genera, families and higher groups occurring in the sea and in fresh water (Denison 1978). The placoderms had a morphological and ecological diversity comparable to the living cartilaginous fishes, but suddenly became extinct in the early Carboniferous and were replaced by chondrichthyians and osteichthyians.
Alternative life-history styles of fishes by Michael N. Bruton (auth.), Michael N. Bruton (eds.)