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.

scholarly journals Fish species richness is associated with the availability of landscape components across seasons in the Amazonian floodplain

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5080 ◽  
Author(s):  
Carlos Edwar Carvalho Freitas ◽  
Laurie Laurenson ◽  
Kedma Cristine Yamamoto ◽  
Bruce Rider Forsberg ◽  
Miguel Petrere ◽  
...  
Keyword(s):  
Species Richness ◽  
Fish Species ◽  
Linear Models ◽  
Fish Assemblages ◽  
Spatial Scales ◽  
Sampling Site ◽  
Floodplain Lakes ◽  
Fish Diversity ◽  
Landscape Variables ◽  
Total Species Richness

Understanding environmental biodiversity drivers in freshwater systems continues to be a fundamental challenge in studies of their fish assemblages. The present study seeks to determine the degree to which landscape variables of Amazonian floodplain lakes influences fish assemblages in these environments. Fish species richness was estimated in 15 Amazonian floodplain lakes during the high and low-water phases and correlated with the areas of four inundated wetland classes: (i) open water, (ii) flooded herbaceous, (iii) flooded shrubs and (iv) flooded forest estimated in different radius circular areas around each sampling site. Data were analyzed using generalized linear models with fish species richness, total and guilds as the dependent variable and estimates of buffered landscape areas as explanatory variables. Our analysis identified the significance of landscape variables in determining the diversity of fish assemblages in Amazonian floodplain lakes. Spatial scale was also identified as a significant determinant of fish diversity as landscape effects were more evident at larger spatial scales. In particular, (1) total species richness was more sensitive to variations in the landscape areas than number of species within guilds and (2) the spatial extent of the wetland class of shrubs was consistently the more influential on fish species diversity.

scholarly journals Fish diversity of floodplain lakes on the lower stretch of the Solimões River

2004 ◽  
Vol 64 (3a) ◽  
pp. 501-510 ◽  
Author(s):  
F. K. Siqueira-Souza ◽  
C. E. C. Freitas
Keyword(s):  
Species Richness ◽  
Fish Community ◽  
River Flow ◽  
Abundant Species ◽  
Floodplain Lakes ◽  
Fish Diversity ◽  
The Town ◽  
Solimões River

The fish community of the Solimões floodplain lakes was studied by bimonthly samples taken from May 2001 to April 2002. These were carried out at lakes Maracá (03º51'33"S, 62º35'08,6"W), Samaúma (03º50'42,1"S, 61º39'49,3"W), and Sumaúma and Sacambú (03º17'11,6"S and 60º04'31,4"W), located between the town of Coari and the confluence of the Solimões and Negro rivers. Collections were done with 15 gillnets of standardized dimensions with several mesh sizes. We collected 1,313 animals distributed in 77 species, belonging to 55 genera of 20 families and 5 orders. Characiformes was the most abundant Order, with a larger number of representatives in the Serrasalmidae and Curimatidae. The most abundant species in the samplings were Psectrogaster rutiloides (132 individuals), Pigocentrus nattereri (115 individuals), and Serrasalmus elongatus (109 individuals). Lakes Samaúma, Sacambú, and Sumaúma were adjusted to logarithmic and lognormal series. The diversity exhibited an inverse gradient to the river flow, showing the highest diversity at Lake Sumaúma, followed by Samaúma, Sacambú, and Maracá. Species richness estimated through the jackknife technique ranged from 78 to 107 species.

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.

scholarly journals Patterns of Pelagic Fish Diversity in Floodplain Lakes of Whitewater and Blackwater Drainage Systems Within the Central Amazon River Basin of Brazil

2021 ◽  
Vol 9 ◽  
Author(s):  
Flávia K. Siqueira-Souza ◽  
Lawrence E. Hurd ◽  
Kedma C. Yamamoto ◽  
Maria Gercilia M. Soares ◽  
Gregory J. Cooper ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
River Basin ◽  
Amazon Basin ◽  
Pelagic Fish ◽  
Floodplain Lakes ◽  
Fish Diversity ◽  
River Systems ◽  
Amazon River Basin ◽  
Central Amazon

The Amazon River Basin, one of the world’s most threatened ecosystems, has an enormous diversity of fish species, a result of temporally and spatially complex habitat containing biogeochemically different river systems. The annual hydrologic cycle results in floodplain lakes during low water and inundates forests during high water, exposing fish to different resources and environmental conditions. The two principal river systems in the central Brazilian Amazon are blackwater, with nutrient-poor acidic water, and nutrient-rich whitewater. Although species-rich, the Amazon Basin is data-poor in terms of comparative studies on a regional scale. We analyzed data sets from independent sampling studies of pelagic fish in 16 floodplain lakes, nine whitewater (Rio Solimões) and seven blackwater (Rio Negro), in the central Amazon Basin of Brazil. Our findings suggest striking similarities in pelagic fish diversity patterns. Species richness was virtually equal (165 in whitewater and 168 in blackwater). Both species richness, and number of migratory species, per lake increased toward the confluence of the rivers in both systems in our study. The proportion of unique species was also similar in whitewater lakes and blackwater (41 and 43%, respectively), boosting total regional richness to 237 species. However, species composition in whitewater lakes was more homogenous (lower β diversity), and species composition was associated with conductivity and pH in whitewater, but with dissolved oxygen and transparency in blackwater. Therefore, regional fish diversity cannot be represented by sampling one lake or even one drainage system, but must include multiple lakes from both systems. These two systems may differ in sensitivity to anthropogenic stressors such as damming and deforestation.

scholarly journals Benthic structure drives butterflyfish species composition and trophic group abundance

2019 ◽  
Author(s):  
Miguel Barbosa ◽  
Neil Coupland ◽  
Clara Douglas ◽  
Ellen Harrison ◽  
Kelly M James ◽  
...  
Keyword(s):  
Species Richness ◽  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Fish Assemblages ◽  
Coral Cover ◽  
Food Sources ◽  
Fish Diversity ◽  
Live Coral ◽  
Benthic Composition

Corals provide structure and food sources vital for the maintenance of coral reef fish diversity. However, coral reefs are currently under threat from climate change, which has led to the largest recorded loss of live coral. The loss of live coral, and corresponding shift in reef benthic composition, are predicted to impact the abundance and composition of coral reef fish species and communities. In this study, we investigate the effect of changes in reef benthic composition (eg. live coral, dead coral, algae), on the diversity and composition in an assemblage of butterflyfish species, in Faafu Atoll in the Maldives after the 2016 bleaching event. We show that differences in community composition of butterflyfish are associated to benthic structure, reflecting species feeding preferences. Interestingly, however, we also show that lower coral cover is not associated to lower abundance and species richness of butterflyfish. Our results suggest that maintenance of coral reef structure after a disturbance provides key microhabitats to accommodate non-corallivorous butterflyfish, thus maintaining abundance and species richness. Overall our study provides support for regulation of richness and abundance of coral reef fish assemblages to short term changes in coral reef benthic composition after disturbance via turnover in composition.

scholarly journals Fish species richness in shallow environments of the Island of Santa Catarina, Southern Brazil

2018 ◽  
Vol 7 ◽  
pp. e20018001
Author(s):  
André Pereira Cattani ◽  
Olímpio Rafael Cardoso ◽  
Gisela Costa Ribeiro ◽  
Marcelo Soeth ◽  
Maurício Hostim-Silva ◽  
...  
Keyword(s):  
Species Richness ◽  
Fish Assemblages ◽  
Abiotic Factors ◽  
Fish Fauna ◽  
Sandy Beaches ◽  
Mean Value ◽  
Taxonomic Structure ◽  
Rocky Shores ◽  
Santa Catarina ◽  
Mean Values

The Island of Santa Catarina is a mosaic of ecosystems of great importance for fish fauna, highlighting the presence, in the same island, of estuaries, lagoons, mangroves, rocky shores and sandy beaches. This study aimed to compare, based on species richness, fish assemblages between different ecosystems. Between 1981 and 2011, there were collected a total of 165 taxa of fish, distributed in 54 families, in six sampling sites, using casting net, sweep net, beach trawl and gill net. According to the species accumulation curve, that show the increase of the number of different species with the increase of the number of samples, for all sites, the curves of species recorded followed patterns similar to curves obtained by the Jacknife index. However, the number of species has stabilized only for samples collected in Saco dos Limões, Itacorubi Mangrove and Ratones Mangrove. Comparing the mean values of richness between sites, the highest mean value was found in Saco dos Limões, followed by Índio Beach, Conceição Lagoon, North Bay , Itacorubi and Ratones Mangroves. Using the list of species as reference, despite the differences in abundance and richness between sites, the taxonomic structure is similar between sampling sites, which supports the hypothesis that the assemblages are occurring in all sites and the differences are primarily related to the patterns of reproduction and recruitment of species and secondarily influenced by abiotic factors, especially the temperature and salinity.

scholarly journals Evaluating the influence of environmental variables on fish assemblages along Tropical Andes: considerations from ecology to conservation

Hydrobiologia ◽  
2021 ◽  
Author(s):  
Rafael Miranda ◽  
Blanca Rios-Touma ◽  
Ana Falconí-López ◽  
Andrea Pino-del-Carpio ◽  
Sergio Gaspar ◽  
...  
Keyword(s):  
Fish Assemblages ◽  
Abiotic Factors ◽  
Regional Scale ◽  
Conservation Strategies ◽  
Fish Diversity ◽  
Fish Community Structure ◽  
Tropical Andes ◽  
Freshwater Biodiversity ◽  
Elevation Gradients ◽  
Ecological Features

AbstractThe lack of knowledge about freshwater biodiversity in remote areas like montane Andean rivers is noticeable and hinder the development of efficient conservation plans for aquatic ecosystems. Habitat requirements of tropical Andean fishes have been poorly analysed, despite the relevance of these ecological features on the fish conservation strategies. The present study aimed to examine fish assemblages along the altitudinal gradient in tropical Andean rivers and their relationship to habitat features to detect the most relevant abiotic factors and their implication on conservation. This study was conducted on a regional scale, along six basins located in tropical Andes (500 to 2,692 m a.s.l.). We studied fish diversity and distribution and their habitats along these elevation gradients. We found 6,320 specimens from 53 genera. Our analysis for the six most common and widely distributed genera (Astroblepus, Brycon, Bryconamericus, Chaetostoma, Pimelodella and Trichomycterus) underlines the relevance of hydromorphological variables on fish community structure in the Andean montane rivers, whereas human alterations seem to be less significant. These findings could be useful for current management and conservation strategies considering present threats over tropical montane rivers.

scholarly journals Benthic structure drives butterflyfish species composition and trophic group abundance

2019 ◽  
Author(s):  
Miguel Barbosa ◽  
Neil Coupland ◽  
Clara Douglas ◽  
Ellen Harrison ◽  
Kelly M James ◽  
...  
Keyword(s):  
Species Richness ◽  
Coral Reef ◽  
Reef Fish ◽  
Coral Reef Fish ◽  
Fish Assemblages ◽  
Coral Cover ◽  
Food Sources ◽  
Fish Diversity ◽  
Live Coral ◽  
Benthic Composition

Corals provide structure and food sources vital for the maintenance of coral reef fish diversity. However, coral reefs are currently under threat from climate change, which has led to the largest recorded loss of live coral. The loss of live coral, and corresponding shift in reef benthic composition, are predicted to impact the abundance and composition of coral reef fish species and communities. In this study, we investigate the effect of changes in reef benthic composition (eg. live coral, dead coral, algae), on the diversity and composition in an assemblage of butterflyfish species, in Faafu Atoll in the Maldives after the 2016 bleaching event. We show that differences in community composition of butterflyfish are associated to benthic structure, reflecting species feeding preferences. Interestingly, however, we also show that lower coral cover is not associated to lower abundance and species richness of butterflyfish. Our results suggest that maintenance of coral reef structure after a disturbance provides key microhabitats to accommodate non-corallivorous butterflyfish, thus maintaining abundance and species richness. Overall our study provides support for regulation of richness and abundance of coral reef fish assemblages to short term changes in coral reef benthic composition after disturbance via turnover in composition.

The endoparasites of Liasis fuscus (Serpentes : Boidae) from the Adelaide River floodplain, Northern Territory, Australia

2015 ◽  
Vol 63 (2) ◽  
pp. 81
Author(s):  
E. Mulder ◽  
L. R. Smales
Keyword(s):  
Species Richness ◽  
Flood Plain ◽  
Northern Territory ◽  
Parasite Fauna ◽  
Wet Season ◽  
River Floodplain ◽  
River Flood ◽  
Seasonal Diversity ◽  
Low Prevalence ◽  
Prevalent Species

This study documents the parasite assemblage of Liasis fuscus Peters, 1873 from the Adelaide River flood plain, Northern Territory, Australia. In total, nine species of helminth (comprising three cestodes and six nematodes), one pentastome and one protozoan were found in 180 water pythons, with the Nematoda being the dominant and most diverse group, and a cestode, Bothridium ornatum Maplestone & Southwell, 1923, the most prevalent species. In spite of the hosts being present in high numbers the helminth assemblage was depauperate, characterised by low prevalence, intensity, frequency and abundance of species, with neither season nor sex of host affecting abundance. There were, however, significant differences between ages of hosts, juveniles having fewer parasites, and seasonal diversity, with the wet season of 2004 and the dry of 2005 the most similar. Of the Australian python species analysed Morelia spilota (Lacépède, 1804) had the highest species richness. The lower species richness found in L. fuscus was possibly due to its unusual biology. Biogeographic relationships of the parasite fauna of L. fuscus are diverse, connections with Africa, Asia, and South America being noted.

scholarly journals Composición y estructura de peces de la microcuenca del río Anchique, Tolima, Colombia

2017 ◽  
Vol 66 (1) ◽  
pp. 336
Author(s):  
Diana Carolina Montoya Ospina ◽  
Francisco Antonio Villa-Navarro ◽  
Edwin Orlando López-Delgado
Keyword(s):  
Environmental Variables ◽  
Fish Assemblages ◽  
Spatial Scales ◽  
High Water ◽  
Structural Features ◽  
Fish Diversity ◽  
Substrate Composition ◽  
Significant Difference ◽  
Fish Samples ◽  
Magdalena River

The distribution and abundance of fish is influenced by multiple factors at temporal and spatial scales, and their community composition represent good river integrity indicators. The main objective of this study was to describe the composition and structure of fish assemblages along the Anchique river sub-basin (that drains to Magdalena river), and to test the hypothesis that these communities vary temporally and spatially. For this, four sites (E1, E2, E3 and E4) were sampled along the river (from river birthplace to Magdalena river), during the periods of high and low waters, in 2014. In each site, longitudinal transects (100 m long x 2 m wide, 60 min) were established and fishing was made with both electrofishing and trawl (10 m x 1 m, 0.05 m) nets. Fish samples were fixed and transported to the laboratory for posterior taxonomic identification with the use of keys; fish diversity and structure composition were calculated with the use of standard models. Besides, substrate composition and environmental variables were also considered. A total of 652 fish belonging to 36 species were recorded; high water showed higher values (325 fish with 32 species) than low water period (300 fish with 31 species). Siluriformes was dominant (51 %), followed by Characiformes (32 %), Gymnotiformes (5 %), Cyprinidontiformes and Cichliformes (6 %). Most abundant families were Characidae (28.3 %; 9 spp.), Loricariidae (23.4 %; 8 spp.) and Trichomycteridae (15.0 %; 2 spp.). Kruskal-Wallis test indicated that there is no significant difference among some environmental variables at the temporal level. The values of structural complexity and substrate composition indices showed that E4 had the highest values (0.8), followed by E1 (0.6), and E2 and E3 (0.4). Moreover, E4 had the highest richness and diversity, according to Hill’s number. The canonical correspondence analysis showed that the substrate, and the complexity and width of the river channel, had a significant influence on fish composition and distribution. The fish community richness and diversity did not change temporarily, but did spatially, which could be related to the different structural features of sampling sites.

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