Difference of ichthyofauna
feeding habits among lateral lagoons and river channel in a large reservoir.
The activities that resulted in the assembly of biological collection was carried out between 2003-2005 under the Study of Environmental Impact of AHEs on the areas of the Madeira River complex, by Furnas Centrais Eletricas and Construtora Norberto Odebrecht, and from 2008-2013 as part of the Ichthyofauna
Conservation Program financed by Santo Antonio Energia.
of this subgroup was discriminate by the highest abundance of Lycengraulis grossidens, Parapimelodus valenciennis, Micropogonias furnieri, Macrodon ancylodon, Brevoortia aurea and Anchoa marinii.
in "Bocas de Dzilam" is dominated by estuarine species, characteristic of other coastal lagoons of the Yucatan Peninsula, such as mojarras and anchovies (Vega Cendejas et al.
The proposed chronology in each section is based on Underhill's (1989) hypotheses of the distribution of Minnesota's ichthyofauna
, with exceptions as noted.
Assessment of the ichthyofauna
in stretches under the influence of Salto Grande Reservoir (Middle Paranapanema River, SP/PR, Brazil).
Fossil otolith assemblages have repeatedly been shown to provide a more detailed and accurate account of Tertiary ichthyofaunas
than the exclusive use of isolated skeletal elements or articulated remains (Nolf 1995).
The resulting cultivation of fish in irregular ponds lacking protective barriers close to river beds led to the contamination of several rivers, endangering the native ichthyofauna
. For example, approximately 656 thousand individuals of this species were estimated to have escaped from fish farming ponds during floods in the upper Parana river watershed in 1996/1997 (ORSI; AGOSTINHO, 1999).
Because it is located at a transition zone and includes several habitat types, the BMLC contains a highly diverse ichthyofauna
with 315 documented species, corresponding to 92 families and 199 genera (Torre-Orozco and Castro-Aguirre 1992; Castro-Aguirre and Torres-Orozco 1993; Cruz Aguero et al.
Thus, reservoirs can endanger local ichthyofauna
once they transform a lotic and diversified system in a more simplified lentic environment (Agostinho et al., 2008).
These variations lead to a significant change in the biology of all living organisms in the new body of water, with the most distinct impact observed on ichthyofauna
(HAHN et al., 1998).
: richness and species abundance: Eight hundred and seventy two fish specimens belonging to 14 species from 9 families and 4 orders were collected.
The Chalk Hill locality has produced a large, as yet undescribed, ichthyofauna
dominated by mesopelagic forms with additional epipelagic as well as nearshore taxa (Table 1).