2016
DOI: 10.1590/1982-0224-20150044
|View full text |Cite
|
Sign up to set email alerts
|

Effects of river damming in Neotropical piscivorous and omnivorous fish: feeding, body condition and abundances

Abstract: The increase in abundance of small-sized fishes is common after a reservoir is formed. There is an increase in the consumption of fish, from typically piscivorous fish to opportunistic species that take advantage of abundant resources. This study aims to evaluate the effects of diet changes induced by damming on the feeding activity and condition factor of typically piscivorous (Hoplias aff. malabaricus and Oligosarcus longirostris) and opportunistic (Astyanax lacustris (ex Astyanax altiparanae) and Pimelodus … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
1
1

Citation Types

0
23
0

Year Published

2017
2017
2022
2022

Publication Types

Select...
7

Relationship

1
6

Authors

Journals

citations
Cited by 36 publications
(23 citation statements)
references
References 38 publications
(46 reference statements)
0
23
0
Order By: Relevance
“…Thus, the observed decrease in guild abundance in the impacted site may be related to migrating fish searching for ideal environmental conditions. As another plausible hypothesis, increased levels of predation pressure resulting from increased water transparency (Chacin & Stallings, ; Pereira et al, ; Shoup & Lane, ) should be able to change several guilds, as all guilds are subject to predation.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Thus, the observed decrease in guild abundance in the impacted site may be related to migrating fish searching for ideal environmental conditions. As another plausible hypothesis, increased levels of predation pressure resulting from increased water transparency (Chacin & Stallings, ; Pereira et al, ; Shoup & Lane, ) should be able to change several guilds, as all guilds are subject to predation.…”
Section: Discussionmentioning
confidence: 99%
“…As another plausible hypothesis, increased levels of predation pressure resulting from increased water transparency (Chacin & Stallings, 2016;Pereira et al, 2016;Shoup & Lane, 2015) should be able to change several guilds, as all guilds are subject to predation.…”
Section: Discussionmentioning
confidence: 99%
“…Otherwise, blocking their migration route along Madeira River and suppressing or reducing the effects of the seasonal flooding could lead to local depletion or extirpation of populations of migratory fishes in the long run (Duponchelle et al, 2016;Kuussaari et al, 2009;Porcher & Travade, 1992). Still, some species that were previously abundant in the rapids stretch of tributaries, especially piscivores such as Acestrorhynchus spp., have become scarce in the reservoirs, suggesting low adaptability to the new conditions and possibly local changes in trophic dynamics (but see Pereira, Agostinho, & Delariva, 2016).…”
Section: Increases In Richness Abundance (Fourfold Over In Sites Insidementioning
confidence: 99%
“…Trawls mainly target demersal organisms (McHugh et al 2017) and species that forage near the bottom (Pombo et al 2014), such as C. nobilis, which is directly affected by such trawling activity. The feeding intensity, described as the fullness index (FI), may be greatly influenced by the availability and type of prey, length range of the predator, reproductive season, and daily variation (Pereira et al 2016, Perelman et al 2017. In the presently reported study, high FI values were found, indicating an intense use of the environment as a feeding area.…”
Section: Discussionmentioning
confidence: 60%