By Michael N. Bruton (auth.), Michael N. Bruton (eds.)
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Extra info for Alternative life-history styles of fishes
Fish. Hobb. 34: 24-27, 30-34, 36, 40-41, 56-57. G . e. Taphorn. 1988. Food habits of piranhas in the low llanos of Venezuela. Biotropica 20: 311-321. S. Arcifa & O. Froehlich. 1987. Fin-feeding by the piranha (Serrasalmus spilopleura Kner): the cropping of a novel renewable resource. Proc. 5th Congr. Europ. , Stockholm 1985: 133-143. G. S . Arcifa. 1986. Differential cropping of the caudal fin lobes of prey fishes by the piranha, Serrasalmus spilopleura Kner. Hydrobiologia 141: 199-205. J. 1986.
The sawfishes (Pristiformes) are un diverse inshore specialists with less than 1% of the batoid species. In considering alternative life-history styles in cartilaginous fishes one can note certain parameters (Fig. 4) that limit, define and enhance the options that chondrichthyians have in exploiting their environment, and which in their evolutionary history may have limited them to less diversity than the bony fishes, class Osteichthyes, and particularly the rayfinned fishes, subclass Actinopterygii.
Sawsharks (5+ species, 1 %) ~ .. Carpet sharks (32+ species, g%) Mackerel sharks (15+ species, 4%) Carcharhiniformes Ground sharks (210+ species, 58%) Fig. 2. Numbers and percentages of species in the orders of living sharks, depicted as a pie graph. Numbers are minimum estimates counted as of May 1, 1989. Carcharhinoid sharks outnumber all other species combined. from 200 to 2000 m or more include about 35% of the total. A very small epipelagic and meso pelagic oceanic component (elasmobranchs only) includes about 2% of the species.
Alternative life-history styles of fishes by Michael N. Bruton (auth.), Michael N. Bruton (eds.)