Ichthyofauna


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Ichthyofauna

 

the aggregate of fishes of any body of water or basin of a zoogeographic region and the aggregate of fishes inhabiting the earth at any given period of its history. The ich-thyofauna of most basins is not uniform in origin; it is composed of species differing in their geographic origin and grouped in different faunal complexes. For example, the ichthyofauna of the Aral basin is composed of the highland-Asiatic faunal complex and of the Ponto-Caspian, the Turkestan, and other complexes. The diversity of the ichthyofauna is determined by the initial faunal complexes that formed a given ichthyofauna, by the history of the basin, and by present-day life conditions of the various species of fishes. As a rule, in the number of species the ichthyofauna of tropical waters is the more diverse, and most diverse is the ichthyofauna of the equatorial waters of the western Pacific Ocean. The poorest ichthyofauna is that of the arctic waters.

References in periodicals archive ?
The ichthyofauna within this area showed an intermediate similarity (45.7% for biomass and 48.2% for abundance), and was mainly dominated by marine species.
Relation between species and hydrologic variables: The ever-changing conditions in hydrology can become a physical barrier for the access of many marine origin species; such is the case of salinity gradients, while variations in temperature can affect ichthyofauna distribution, through their thermal differences, but above all because of the joined effect with dissolved oxygen (Marshall and Elliott 1998).
In addition to its great diversity and species richness, the ichthyofauna of the BMLC is temporally variable.
Knowledge about trophic interactions can provide a better understanding of the interactions among ichthyofauna components and with other aquatic communities or even with semi-terrestrial and terrestrial organisms (Hahn et al., 1997a; Uieda and Motta, 2007).
This example of trophic plasticity--which is a common feature among freshwater teleosts, especially in tropical river waters, where generalist and opportunist species prevail--makes difficult a generalization of the feeding ecology of ichthyofauna (ABELHA et al., 2001).
Late Miocene ichthyofauna at LACM locality 6907 Pomona Freeway Chalk Hill, Yorba Member of the Puente Formation, California.
Thus, based on such peculiarities as climate, hydrology, intermittency of rivers and different water uses combined with biogeographical aspects, we can ask if the composition, structure and spatiotemporal patterns of the diversity and abundance of the ichthyofauna of reservoirs in semi-arid regions different from those of reservoirs in other regions of Brazil?
Thorson (ed.) Investigations of the ichthyofauna of Nicaraguan Lakes.
Little information exists about the coastal ichthyofauna of Baja California, but many species are distributed from Baja California to the Southern California Bight.
The composition of the region's ichthyofauna is influenced by seasonal fluctuations in salinity levels and the turbidity of the water, which is controlled by the estuarine plume (Barthem, 1985).