The aim is to understand how Cichla affects the small size ichthyofauna
, comparing the assemblage structure before and after (in a relatively long term) the introduction.
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).