scholarly journals Changes in diet and niche breadth of a small fish species in response to the flood pulse in a Neotropical floodplain lake

Limnologica ◽  
2017 ◽  
Vol 62 ◽  
pp. 126-131 ◽  
Author(s):  
Bárbara Angélio Quirino ◽  
Natalia Carniatto ◽  
Renata Guglielmetti ◽  
Rosemara Fugi
Keyword(s):  
Fish Species ◽  
Niche Breadth ◽  
Flood Pulse ◽  
Small Fish ◽  
Floodplain Lake ◽  
Neotropical Floodplain

scholarly journals Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

2016 ◽  
Vol 46 (3) ◽  
pp. 259-270 ◽  
Author(s):  
Bruno da S. PRUDENTE ◽  
Pedro CARNEIRO-MARINHO ◽  
Roberta de M. VALENTE ◽  
Luciano F. de A. MONTAG
Keyword(s):  
Feeding Ecology ◽  
Diet Composition ◽  
Niche Breadth ◽  
Life Stage ◽  
Flood Pulse ◽  
Feeding Intensity ◽  
High Tendency ◽  
Flood Season ◽  
River Region ◽  
The Relationship

Abstract Studies on feeding ecology of fishes are important to understand the relationship between species and environmental seasonal variations. In tropical rivers, these relationships are mainly modeled by hydrological patterns. Thereby, this study aimed to assess the influence of fluviometric variation and life stage (juveniles and adults) in the feeding ecology of Serrasalmus gouldingi in the lower Anapu River region, located in Eastern Amazon, Pará, Brazil. Specimens were collected bimonthly, considering four different hydrological periods. We assessed the diet composition, feeding intensity and niche breadth of the species. Thirty-two dietary items were identified and grouped into ten categories. A total of 279 stomachs were analyzed, showing a predominance of fish fragments, followed by fruits and seeds. The diet composition of S. gouldingi differed only between drought and flood season, although it did not differ between juveniles and adults. An increase in feeding intensity was recorded during the rise in the water level, with a lower feeding intensity observed during transitional season. Serrasalmus gouldingi showed lower niche breadth during flood season, attributed to the high consumption of fruits and seeds, presenting an omnivorous diet with high tendency towards piscivory. Although less evident than in other Amazon watersheds, the flood pulse in the lower Anapu River region is an important factor influencing the feeding ecology of the species.

scholarly journals Use of food resources by small fish species in Neotropical rivers: responses to spatial and temporal variations

2014 ◽  
Vol 31 (5) ◽  
pp. 435-444 ◽  
Author(s):  
Jislaine Cristina da Silva ◽  
Éder André Gubiani ◽  
Rosilene Luciana Delariva
Keyword(s):  
Fish Species ◽  
Temporal Variations ◽  
Food Resources ◽  
Spatial And Temporal Variations ◽  
Small Fish

Length–weight relationships for six fish species found in a floodplain lake of the Madeira River, Brazilian Amazon

2020 ◽  
Vol 36 (6) ◽  
pp. 842-844
Author(s):  
Severino Adriano de Oliveira Lima ◽  
Raniere Garcez Costa Sousa
Keyword(s):  
Fish Species ◽  
Brazilian Amazon ◽  
Floodplain Lake ◽  
Madeira River

scholarly journals Nest-site selection in a fish species with paternal care

Hydrobiologia ◽  
2020 ◽  
Author(s):  
Theo C. M. Bakker ◽  
Beat Mundwiler
Keyword(s):  
Dissolved Oxygen ◽  
Water Temperature ◽  
Oxygen Concentration ◽  
Fish Species ◽  
Nest Site ◽  
Paternal Care ◽  
Small Fish ◽  
Dissolved Oxygen Concentration ◽  
Nest Sites ◽  
Higher Temperature

AbstractFish that perform paternal care may increase their fitness by choosing nest sites that enhance survival and development of embryos. We studied nest-site choice with respect to dissolved oxygen concentration and water temperature in males of the three-spined stickleback (Gasterosteus aculeatus), a small fish species with exclusive male parental care that usually breeds in the littoral zone of freshwaters of the Northern hemisphere. Fathers oxygenate the embryos by fanning movements of their pectoral fins. We expected choice for conditions at potential nest sites that would benefit offspring development, i.e., higher temperature and higher dissolved oxygen concentration. In the laboratory, we offered males a choice between two potential nest sites that differed in dissolved oxygen concentration or water temperature. Males preferred to build a nest at sites with a higher dissolved oxygen level or higher temperature and thus chose sites that would promote embryo development.

scholarly journals Diet and niche breadth and overlap in fish communities within the area affected by an Amazonian reservoir (Amapá, Brazil)

2014 ◽  
Vol 86 (1) ◽  
pp. 383-406 ◽  
Author(s):  
JÚLIO C. SÁ-OLIVEIRA ◽  
RONALDO ANGELINI ◽  
VICTORIA J. ISAAC-NAHUM
Keyword(s):  
Community Structure ◽  
Seasonal Variation ◽  
Fish Species ◽  
Niche Breadth ◽  
Null Model ◽  
Stomach Contents ◽  
Physical Conditions ◽  
River Damming ◽  
Standard Configuration ◽  
Feeding Resources

We investigated the niche breadth and overlap of the fish species occurring in four environments affected by the Coaracy Nunes reservoir, in the Amapá Brazilian State. Seasonal samples of fishes were taken using a standard configuration of gillnets, as well as dragnets, lines, and castnets. Five hundred and forty stomach contents, representing 47 fish species were analyzed and quantified. Niche breadth and overlap were estimated using indexes of Levins and Pianka, respectively, while interspecific competition was evaluated using a null model (RA3). ANOVA and the KruskalWallis test were used, respectively, to evaluate differences in niche breadth and overlap between areas. The data indicate that the majority of the fish species belong to the piscivore, omnivore, and detritivore guilds. These species have likely colonized the environments due to the availability of suitable feeding resources, and the favorable physical conditions created by the river damming. Overall, few species have ample niches, but most of them are highly specialized. Resources seasonal variation had little effect on the feeding behavior of most species in the study areas. The null models indicated that competition was not a factor determining on community structure.

Adaptations of fish species to oxygen depletion in a central Amazonian floodplain lake

Hydrobiologia ◽  
2006 ◽  
Vol 568 (1) ◽  
pp. 353-367 ◽  
Author(s):  
M. G. M. Soares ◽  
N. A. Menezes ◽  
W. J. Junk
Keyword(s):  
Fish Species ◽  
Oxygen Depletion ◽  
Floodplain Lake

Phytoplankton–bacterioplankton interactions in a neotropical floodplain lake (Laguna Bufeos, Bolivia)

Hydrobiologia ◽  
2005 ◽  
Vol 543 (1) ◽  
pp. 91-99 ◽  
Author(s):  
Danny Rejas ◽  
Koenraad Muylaert ◽  
Luc De Meester
Keyword(s):  
Floodplain Lake ◽  
Neotropical Floodplain

Length-weight relationships of four small fish species caught in the Heishui River, China

2016 ◽  
Vol 32 (2) ◽  
pp. 397-398 ◽  
Author(s):  
C. Wang ◽  
Y. Q. Liang ◽  
D.-M. Huang ◽  
M. Li
Keyword(s):  
Fish Species ◽  
Small Fish
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