The Influence of Habitat Structure on Fish Assemblage Composition in Southeastern Blackwater Streams

1988 ◽  
Vol 120 (2) ◽  
pp. 225 ◽  
Author(s):  
Gary K. Meffe ◽  
Andrew L. Sheldon
Keyword(s):  
Fish Assemblage ◽  
Habitat Structure ◽  
Assemblage Composition

scholarly journals Second floor, please: the fish fauna of floating litter banks in Amazonian streams and rivers

2013 ◽  
Vol 11 (1) ◽  
pp. 85-94 ◽  
Author(s):  
Lucelia Nobre Carvalho ◽  
Luana Fidelis ◽  
Rafael Arruda ◽  
Andre Galuch ◽  
Jansen Zuanon
Keyword(s):  
Species Richness ◽  
Fish Assemblage ◽  
Amazon Basin ◽  
Stream Water ◽  
Fish Fauna ◽  
Assemblage Composition ◽  
Plant Matter ◽  
Carnivorous Species ◽  
Ephemeral Habitat ◽  
Dead Plant

Floating litter banks are an ephemeral habitat consisting of branches, twigs, flowers, seeds, and fruits that are trapped on the stream water surface by a variety of retention mechanisms. These heterogeneous materials form a deep layer of dead plant matter that is colonized by a variety of organisms, including fish that forage on the aquatic macroinvertebrates found in this unique habitat. In this study, we aimed to characterize which fish species occupy the floating litter banks and their trophic characteristics, as well as determine if fish assemblage composition and species richness can be predicted by the size of the floating litter banks. Fish sampling was conducted in five rivers located in the Amazon basin. Of the 31 floating litter banks sampled that contained fish, 455 individuals were recorded and were distributed within 40 species, 15 families and five orders. Siluriformes were the most representative order among the samples and contained the largest number of families and species. The fish fauna sampled was mainly composed of carnivorous species that are typically found in submerged litter banks of Amazonian streams. The fish assemblage composition in the kinon can be predicted by the volume of the floating litter banks using both presence/absence and abundance data, but not its species richness. In conclusion, kinon banks harbor a rich fish assemblage that utilizes this habitat for shelter and feeding, and may function as a refuge for the fishes during the peak of the flooding season.

scholarly journals Temporal variation in fish assemblage composition on a tidal flat

2004 ◽  
Vol 52 (1) ◽  
pp. 47-58 ◽  
Author(s):  
Henry L. Spach ◽  
Rodrigo S. Godefroid ◽  
César Santos ◽  
Roberto Schwarz Jr. ◽  
Guilherme M. L. de Queiroz
Keyword(s):  
Tidal Flat ◽  
Fish Assemblage ◽  
Annual Variation ◽  
Full Moon ◽  
Temporal Change ◽  
High Tide ◽  
Great Influence ◽  
Assemblage Composition ◽  
Combined Action ◽  
Wind Intensity

Annual variation in the fish assemblage characteristics on a tidal flat was studied in coastal Paraná, in southern Brazil. Fish were collected between August 1998 and July 1999, during the diurnal high tide and diurnal and nocturnal low tide of the syzygial (full moon) and quadrature (waning moon) tides, to characterize temporal change in assemblage composition. A total of 64,265 fish in 133 species were collected. The average number of species and individuals, biomass, species richness, diversity (mass) and equitability varied significantly over time . The dissimilarity of the assemblage was greatest in August, September and October in contrast with the period from November to January, with the lowest dissimilarity. The combined action of water temperature, salinity and wind intensity had a great influence over the structure of the fish assemblage.

scholarly journals Cambodian Freshwater Fish Assemblage Structure and Distribution Patterns: Using a Large-Scale Monitoring Network to Understand the Dynamics and Management Implications of Species Clusters in a Global Biodiversity Hotspot

Water ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 2506
Author(s):  
Kakada Pin ◽  
Savat Nut ◽  
Zeb Hogan ◽  
Sudeep Chandra ◽  
Samadee Saray ◽  
...  
Keyword(s):  
Indicator Species ◽  
Fish Assemblage ◽  
Fish Assemblages ◽  
Mekong River ◽  
Biodiversity Hotspots ◽  
Fish Assemblage Structure ◽  
Assemblage Composition ◽  
Tonle Sap Lake ◽  
Tonle Sap ◽  
High Diversity

Mekong River Basin is one of the world’s fish biodiversity hotspots. Fisheries of the Cambodian Mekong are characterized by high diversity and productivity. However, few studies have focused on broad scale patterns and fish assemblage structure of this important system at a national level. Here, we describe spatial and seasonal variation in fish assemblages by analyzing one year of daily fish catch data sampled at 32 sites covering Cambodia’s main inland water bodies. We recorded 125 fish species. Four clusters were distinguished based on assemblage composition similarity, and 95 indicator species were identified to characterize each of the identified assemblage clusters. High diversity fish assemblages were associated with the upper Mekong system and Mekong/Bassac/Tonle Sap Rivers in Kandal Province and southern Tonle Sap Lake while lower diversity assemblages were observed in the Mekong River in Kratie and the northern area of the Tonle Sap Lake. We find significant variation in the assemblage composition between wet and dry seasons, indicating strong seasonal species turnover within clusters. Length–weight relationship analysis indicated a negative allometric growth among a majority of indicator species, reflecting suboptimal conditions for growth. Our study establishes contemporary structure and diversity patterns in the Lower Mekong River system of Cambodia, which can be used to map fish biodiversity hotspots and assess key indicative fish stocks’ statuses for conservation and management.

scholarly journals Fish assemblage composition in a tributary of the Mogi Guaçu river basin, southeastern Brazil

2003 ◽  
Vol 93 (2) ◽  
pp. 127-138 ◽  
Author(s):  
Alexandre Kannebley de Oliveira ◽  
Júlio César Garavello
Keyword(s):  
River Basin ◽  
Fish Assemblage ◽  
Southeastern Brazil ◽  
Assemblage Composition

scholarly journals Composition and structure of fish assemblage from Passa Cinco stream, Corumbataí river sub-basin, SP, Brazil

2012 ◽  
Vol 72 (1) ◽  
pp. 87-96
Author(s):  
AL Carmassi ◽  
G Rondineli ◽  
FC Ferreira ◽  
FMS Braga
Keyword(s):  
Species Distribution ◽  
Fish Assemblage ◽  
Altitudinal Gradient ◽  
Habitat Diversity ◽  
Important Species ◽  
Assemblage Composition ◽  
Gill Nets ◽  
Composition And Structure ◽  
Significant Difference ◽  
Richness Index

The aim of this work was to determine the composition of the fish assemblage of Passa Cinco stream and verify changes in their structure on the altitudinal gradient. Six samples were performed at five different sites in Passa Cinco stream (from the headwater, at order two, to its mouth, at order six), using an electric fishery equipment and gill nets in May, July, September and November of 2005 and January and March of 2006. The indices of Shannon's diversity, Pielou's evenness and Margalef's richness were quantified separately considering the different fishery equipment (nets versus electric fishery equipment). An ANOVA was used to compare samples collected in relation to values of abundance, diversity, evenness and richness. The representativeness of the species was summarised by their average values of abundance and weight. We captured 5082 individuals distributed into 61 species. We observed a trend of increasing diversity, richness and evenness of species from site 1 to 3, with further decrease in sites 4 and 5. The values found for habitat diversity also followed this pattern. Significant differences were found for all three indices considering the electric fishery samples. For individuals caught with nets, only the richness index showed a significant difference. Characidium aff. zebra was an important species in the headwater and transition sites and Hypostomus strigaticeps in middle-lower course sites. Despite the small extension of the Passa Cinco stream, environments structurally well defined were evidenced by the species distribution and assemblage composition along the gradient.

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