Regulation and stability in fish assemblages of neotropical floodplain lakes

Oecologia ◽  
1994 ◽  
Vol 99 (1-2) ◽  
pp. 166-180 ◽  
Author(s):  
Macro A. Rodríguez ◽  
William M. Lewis
Keyword(s):  
Fish Assemblages ◽  
Floodplain Lakes ◽  
Neotropical Floodplain

Dam reverse flow events influence limnological variables and fish assemblages of a downstream tributary in a Neotropical floodplain

2019 ◽  
Vol 36 (2) ◽  
pp. 305-313
Author(s):  
Karina Ferreira ◽  
Taise Miranda Lopes ◽  
Igor de Paiva Affonso ◽  
Angelo Antonio Agostinho ◽  
Luiz Carlos Gomes
Keyword(s):  
Fish Assemblages ◽  
Reverse Flow ◽  
Neotropical Floodplain

scholarly journals Interconnectedness during high water maintains similarity in fish assemblages of island floodplain lakes in the Amazonian Basin

2010 ◽  
Vol 27 (6) ◽  
pp. 931-938 ◽  
Author(s):  
Carlos Edwar de C. Freitas ◽  
Flávia K. Siqueira-Souza ◽  
Alan Rezk Guimarães ◽  
Fabiane A. Santos ◽  
Ivanildo L.A. Santos
Keyword(s):  
Fish Assemblages ◽  
High Water ◽  
Floodplain Lakes

scholarly journals Single-Species Co-management Improves Fish Assemblage Structure and Composition in a Tropical River

2021 ◽  
Vol 9 ◽  
Author(s):  
Wendell M. Medeiros-Leal ◽  
Leandro Castello ◽  
Carlos E. C. Freitas ◽  
Flávia K. Siqueira-Souza
Keyword(s):  
Fish Assemblage ◽  
Amazon Basin ◽  
Fish Assemblages ◽  
Single Species ◽  
Floodplain Lakes ◽  
Fish Diversity ◽  
Fish Assemblage Structure ◽  
Target Species ◽  
Limited Access ◽  
Positive Effects

Co-management is increasingly recognized as an effective model for managing fisheries, but little information exists on whether co-management can produce effects in species other than the target species. Fishery co-management in the tropics, where fish diversity is high and fish catches tend to be multispecies, is prone to produce assemblage-wide effects via alterations in the food web and changes in the overall capture of non-target species. Here, we assessed the effects of co-management for the species Arapaima sp. in relation to the structure and composition of the overall fish assemblage in floodplain lakes of the central Amazon Basin. These floodplain lakes are managed under a system of zoning of fishing activities. We used data from surveys of six floodplain lakes, including two lakes of each of three categories (lakes where fishing is prohibited, limited-access lakes, and open fishing lakes). The surveys were carried out before and after implementation of co-management, through gillnet fishing. The study area was the lower Solimões River, in the Amazon Basin, Brazil. Statistical models showed significant changes in the composition and structure of the fish assemblages after the implementation of the co-management, regardless of the zoning category. Through regulation of gear use and fishing practices, co-management allowed the colonization of species that had not been present before, which lead to higher richness and consequently increased fish sizes, abundance and biomass. Species of sedentary habits, migrants of short and medium distances, with commercial importance benefited the most from co-management. In the results presented in temporal scale, it was possible to observe a potential spillover effect being provided by the lakes where fishing is prohibited (no-take zones) and those of limited access that benefited those open to fishing. Thus, co-management had positive effects in the structure and composition of fish assemblages in all lakes, regardless of zoning category.

Spatial scales and the invasion paradox: a test using fish assemblages in a Neotropical floodplain

Hydrobiologia ◽  
2018 ◽  
Vol 817 (1) ◽  
pp. 121-131 ◽  
Author(s):  
Daniel Alves dos Santos ◽  
David Joseph Hoeinghaus ◽  
Luiz Carlos Gomes
Keyword(s):  
Fish Assemblages ◽  
Spatial Scales ◽  
Neotropical Floodplain ◽  
Invasion Paradox

Fish assemblages in floodplain lakes in a Neotropical river during the wet season (Magdalena River, Colombia)

2012 ◽  
Vol 28 (3) ◽  
pp. 271-279 ◽  
Author(s):  
Carlos Granado-Lorencio ◽  
Alejandra Gulfo ◽  
Frank Alvarez ◽  
Luz Fernanda Jiménez-Segura ◽  
Juan David Carvajal-Quintero ◽  
...  
Keyword(s):  
Species Richness ◽  
Fish Assemblages ◽  
Abiotic Factors ◽  
Environmental Parameters ◽  
Floodplain Lakes ◽  
Fish Diversity ◽  
Wet Season ◽  
River Floodplain ◽  
Lake Morphology ◽  
Magdalena River

Abstract:A number of studies have pointed out that abiotic factors and recolonization dynamics appear to be more important than biotic interactions in structuring river–fish assemblages. In this paper, we studied the fish assemblages in 27 floodplain lakes, with perennial connection to the river, in the middle section of the Magdalena River (Colombia), to examine spatial pattern in freshwater fish diversity in relation to some environmental parameters. Our objective was to examine relationships between floodplain-lake fish communities and environmental variables associated with lake morphology, water chemistry and river–floodplain connectivity in a large river–floodplain ecosystem. During the study, a total of 18 237 fish were caught from 50 species (regional richness; 17 were migrants and 33 residents). In the present study, the most diverse order was Characiformes with 20 species, followed by Siluriformes, with 19 species. Characidae and Loricaridae were the richest families. The range of species richness (local richness) varied between five and 39 species. Similarity of local assemblages (using the presence–absence data) depends on the distance between lakes. A positive relationship was observed between the Ln of the total abundance of each species and the number of lakes where they were found. Out of all the environmental parameters taken in the lakes, only the size (Log Area) and relative perimeter length are significantly related to local assemblage species richness. It has not been possible to demonstrate that the connectivity (distance) from lakes to the main river can be considered a predictor of the local richness.

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