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By Michael N. Bruton (auth.), Michael N. Bruton (eds.)

ISBN-10: 9400920652

ISBN-13: 9789400920651

ISBN-10: 9401074275

ISBN-13: 9789401074278

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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.

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Alternative life-history styles of fishes by Michael N. Bruton (auth.), Michael N. Bruton (eds.)


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