scholarly journals Analysis of fish assemblages in sectors along a salinity gradient based on species, families and functional groups

2013 ◽  
Vol 61 (4) ◽  
pp. 251-264 ◽  
Author(s):  
Ana Carolina dos Passos ◽  
Riguel Feltrin Contente ◽  
Felippe Veneziani Abbatepaulo ◽  
Henry Louis Spach ◽  
Ciro Colodetti Vilar ◽  
...  
Keyword(s):  
Functional Groups ◽  
Fish Assemblages ◽  
Salinity Gradient ◽  
Fish Fauna ◽  
Abundant Species ◽  
Number Of Species ◽  
Salinity Gradients ◽  
Gradient Based ◽  
Subtropical Estuaries ◽  
East West

Here we test the effects of the east-west salinity gradient in the subtropical Paranaguá Bay Estuarine Complex (PEC) on the structure of shallow water fish fauna, determined according to taxonomic (families and species) and functional composition metrics. A total of 152 species were observed. The families with the largest number of species were the Sciaenidae, Carangidae, Haemulidae and Gobiidae. The most abundant species were Atherinella brasiliensis, Harengula clupeola, Anchoa januaria and Anchoa tricolor. Marine stragglers dominated in number of species, followed by marine migrants and estuarine species. Most species were zoobenthivores, followed by piscivores and zooplanktivores. Families and species more frequently associated with estuarine conditions dominated in the mesohaline sector, and those more frequently associated with marine conditions dominated in the euhaline sector. The fish assemblages along the estuarine salinity gradient were found to be better characterized by taxonomic metrics than by functional ones. This is most likely because individuals of all functional groups inhabit all salinity sectors, and thus these metrics are not useful for differentiating assemblages along salinity gradients. Our results differ from those of other studies in tropical and subtropical estuaries, which have emphasized the importance of functional groups in determining fish assemblages along salinity gradients.

scholarly journals Fish assemblages in a coastal bay adjacent to a network of marine protected areas in southern Brazil

2016 ◽  
Vol 64 (3) ◽  
pp. 295-308 ◽  
Author(s):  
André Pereira Cattani ◽  
Fábio Gonçalves Daura Jorge ◽  
Gisela Costa Ribeiro ◽  
Leonardo Liberali Wedekin ◽  
Paulo César de Azevedo Simões Lopes ◽  
...  
Keyword(s):  
Protected Areas ◽  
Marine Protected Areas ◽  
Fish Assemblage ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Abundant Species ◽  
Environmental Data ◽  
Fish Assemblage Structure ◽  
Principal Coordinates ◽  
Coastal Bay

Abstract Baía Norte (North Bay) in Santa Catarina State is considered a typical coastal bay and is surrounded by a network of Marine Protected Areas. The objectives of this study were to describe the composition of the demersal fish assemblage, identify seasonal and spatial structures on a fine scale and evaluate the role of habitat descriptors and abiotic variables affecting the fish assemblage structure. Seasonal samplings were conducted in 2005, using bottom trawls in six pre-established areas in Baía Norte in summer, fall, winter and spring. Simultaneously with each trawl, environmental data were collected with a multiparameter probe. Temporal and spatial differences in fish abundance were tested by a PERMANOVA. To illustratethe differences detected graphically we ran a canonical analysis of principal coordinates (CAP). The influence of environmental variables on the fish fauna was evaluated using a Distant Based Linear Model (DistLM) with Akaike's information criterion (AIC). A total of 9,888 specimens, distributed in 27 families and 62 species, were collected. Citharichthys spilopterus was the most abundant species. PERMANOVA detected differences for abundance between seasons, areas and interaction among all the factors. The DISTLM selected temperature and pH. The results highlight seasonality as an important factor in the structuring of fish fauna of the study place.

scholarly journals Fishes (Osteichthyes: Actinopterygii) from igarapés of the rio Acre basin, Brazilian Amazon

Check List ◽  
2013 ◽  
Vol 9 (6) ◽  
pp. 1410 ◽  
Author(s):  
Alexander Claro-García ◽  
Lisandro Juno Soares Vieira ◽  
Lucas Ribeiro Jarduli ◽  
Vitor Pimenta Abrahão ◽  
Oscar Akio Shibatta
Keyword(s):  
Fish Assemblages ◽  
New Records ◽  
Fish Fauna ◽  
Brazilian Amazon ◽  
Species Accumulation Curve ◽  
High Importance ◽  
Accumulation Curve ◽  
Species Accumulation ◽  
Number Of Species ◽  
Fauna Composition

This study presents a list of species from igarapés tributaries of the rio Acre, Acre State, Brazil. Fish assemblages were sampled in October 2009, August and October 2010, using standard ichthyological gear, along fifteen sampling sites. A total of 11,395 specimens, distributed in 94 species, 24 families and six orders were collected. The most species-rich orders were Characiformes with 45 species (48.4%) and Siluriformes with 33 species (34.7%); from which Serrapinnus gr. microdon (22.4%), Otocinclus vittatus (20.4%), Phenacogaster pectinatus (10.9%), Brachychalcinus copei (5.8%) and Knodus sp. (5.3%) represented 64.8 % of the specimens captured. The species accumulation curve does not present a stabilization tendency, indicating that, additional sampling can increase the number of species. This study has a high importance for the knowledge of the rio Acre fish fauna composition and adds 52 new records of species to the fish fauna of the rio Purus.

scholarly journals Temporal changes in fish abundance in response to hydrological variability in a dryland floodplain river

2009 ◽  
Vol 60 (2) ◽  
pp. 146 ◽  
Author(s):  
Stephen R. Balcombe ◽  
Angela H. Arthington
Keyword(s):  
Fish Assemblages ◽  
Arid Zone ◽  
Fish Fauna ◽  
Abundant Species ◽  
Channel Flows ◽  
Hydrological Variability ◽  
Dryland River ◽  
Floodplain Habitats ◽  
Riverine Fish ◽  
Harsh Conditions

Riverine fish living in unpredictable flow environments tend to be ecological generalists with traits that allow them to persist under highly variable and often harsh conditions associated with hydrological variation. Cooper Creek, an Australian dryland river, is characterised by extreme flow variability, especially in the magnitude, timing and duration of channel flows and floods, which, if they occur, do so mainly in summer. The present study examined the influence of hydrological variability on fish assemblages and abundance in four waterholes in the Windorah reach of Cooper Creek over eight occasions between 2001 and 2004. Antecedent flows had marked influences on fish species richness and assemblage structure. Following high summer flows, all waterholes supported a rich and abundant fish fauna, whereas fewer species and lower numbers were recorded following periods of zero channel flow. Recruitment of three of the four most common and abundant species was enhanced when intermittent flows inundated backwater and floodplain habitats that provide a food-rich environment. Opportunistic responses to rising channel flows and occasional large floods in Cooper Creek help to explain the prominent ‘boom’ patterns of fish production in this arid-zone river, whereas low-level recruitment during periods of low or no flow maintains populations of some species through the ‘bust’.

scholarly journals Anthropogenic effects on the fish fauna of River Hernád

2015 ◽  
pp. 21-27
Author(s):  
Roland Csipkés ◽  
László Stündl
Keyword(s):  
Detrimental Effect ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Anthropogenic Effects ◽  
Frequency Of Occurrence ◽  
Number Of Species ◽  
Tubenose Goby ◽  
Dominant Fish ◽  
Proterorhinus Semilunaris ◽  
First Time

The fish fauna of the River Hernád was examined in 24 sampling sites in summer of 2014. As a result of the survey 31 species were detected of which eight are protected and three are highly protected by law in Hungary. The presence of the adventive tubenose goby (Proterorhinus semilunaris) in the estuary of the Hernád was observed for the first time by us. The most frequently detected species (with 100% frequency of occurrence, FO) were the chub (Squaliuscephalus), the bitterling (Rhodeusamarus) and the bleak (Alburnusalburnus), in addition the bleak was also the most dominant fish of the river. The hydraulic works have detrimental effect on the number of species and specimens and on the diversity of the fish fauna as well. The natural sections of the River Hernád have the most diverse fish assemblages.

A Late Cretaceous (Turonian) Ichthyofauna from Lac des Bois,Northwest Territories, Canada, with paleobiogeographic comparisons with Turonian ichthyofaunas of the Western Interior Seaway

1996 ◽  
Vol 33 (10) ◽  
pp. 1375-1389 ◽  
Author(s):  
Christopher Fielitz
Keyword(s):  
Cluster Analysis ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Group Method ◽  
Western Interior Seaway ◽  
The North ◽  
Pair Group ◽  
Arctic Fish ◽  
East West ◽  
Unweighted Pair Group Method

A fish fauna from a Turonian sequence of the Great Bear Basin at Lac des Bois is described. The fauna includes examples of Ichthyodectes, cf. Osmeroides, a euteleost, and several aulopiforrn fishes such as Enchodus, Cimolichthys, and a juvenile that cannot be further identified. The fauna of Lac des Bois most closely resembles other Arctic fish assemblages of the Western Interior Seaway based on a UPGMA (unweighted pair-group method with arithmetic averages) cluster analysis of various North American Turonian localities. There are also slight differences between eastern and western localities along the seaway. The north–south differences of the ichthyofauna can be explained by current patterns distributing the fishes in the seaway, or transgressive events during the Turonian. The east–west differences may be due to changes in water depth from east to west.

scholarly journals Variation of the ichthyofauna along the Goioerê River: an important tributary of the Piquiri-Paraná basin

2014 ◽  
Vol 104 (1) ◽  
pp. 104-112 ◽  
Author(s):  
Claudenice Dei Tos ◽  
Luiz C. Gomes ◽  
Maria A. Rodrigues
Keyword(s):  
Fish Assemblage ◽  
Fish Community ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Abundant Species ◽  
Longitudinal Distribution ◽  
Longitudinal Variation ◽  
Community Patterns ◽  
Species Dominance ◽  
Conservation And Management

The construction of reservoirs is considered an important source of impacts on the fish fauna, severely altering the structure of the assemblage. This paper aimed to describe the structure of the fish assemblage of the Goioerê River, determining its longitudinal distribution and patterns of species dominance. The evaluation of its longitudinal variation in the diversity and abundance of the fish assemblage was conducted in July and October 2004 and January and May 2005. The collections were carried out near the headwaters (Gurucaia), middle stretch (Olaria), just above the falls (Paiquerê) and downstream (Foz). Forty-four species were captured. The Gurucaia fish assemblages differed significantly from Olaria, Paiquerê and Foz. The Olaria assemblages differed significantly from the Foz. Gurucaia showed the lowest diversity and abundance of species. Astyanax aff paranae Eigenmann,1914 (78% of the total) was found to be dominant at this site. Almost the same species richness was found at Olaria and Paiquerê, although Olaria had the greatest abundance of individuals. Astyanax aff paranae, Cyphocharax modestus (Fernández-Yépez, 1948) and Astyanax altiparanae Garutti & Britski, 2000 were the top three dominants and comprised over 71% of the total number of fish caught. At Paiquerê, Astyanax altiparanae, Hypostomus aff ancistroides (Ihering, 1911) and Loricariichthys platymetopon Isbrücker & Nijssen, 1979 composed 58% of the catches. Thirty-one species were recorded at Foz, which presented the greatest richness. The most abundant species were Apareiodon affinis (Steindachner, 1879), Galeocharax knerii (Steindachner, 1879) and A.altiparanae, which contributed to 50% of the total catches in this environment.These results record the fish biodiversity and how the community is longitudinally structured in the Goioerê River, and also demonstrate how this type of evaluation is important to understanding the fish community patterns and finding solutions to problems related to the conservation and management of the basin.

scholarly journals Fish assemblages and their ecological traits along an elevational gradient in the Río Pacuare, Costa Rica

2018 ◽  
Vol 66 (1-1) ◽  
pp. 132
Author(s):  
Jorge Picado Barboza ◽  
Gerardo Umaña Villalobos
Keyword(s):  
Costa Rica ◽  
Fish Assemblages ◽  
Species Turnover ◽  
Habitat Preferences ◽  
Elevation Gradient ◽  
Fish Fauna ◽  
River Mouth ◽  
Elevational Gradient ◽  
Abundant Species ◽  
Alpha And Beta Diversity

Between May 2004 and May 2005, we sampled fish in 19 sites, grouped in four elevations, ranging from the river mouth to 650 m.a.s.l. in the Río Pacuare, Caribbean versant of Costa Rica. Changes in the distribution and composition of the fish fauna, as well as patterns of alpha and beta diversity along an elevational gradient were assessed. Additional analyses of habitat preferences, trophic guilds, functional groups and general ecology for the most abundant species are included. All fish captured were classified into 22 families, 43 genera and 53 species. The most abundant family was Characidae, followed by Gobiidae, Mugilidae, Poeciliidae and Heptateridae, which together comprise 87.9 % of all sampled individuals. Elevation shows an inverse effect on species diversity, we observed a monotonic decrease in species richness with increasing elevation (p < 0.05), as reported in other tropical rivers. According to our results, in the Río Pacuare the total fish fauna diversity is found within the first 500 m.a.s.l. Species turnover increases with elevation, while nestedness decreases. Turnover was dominated by the loss of species rather than gain; the higher species loss was registered between the river mouth and the lower river reach (< 100 m.a.s.l.). Seven species can be classified as typical or core species (Astyanax aeneus, Sicydium altum, Agonostomus monticola, Poecilia gillii, Brycon costaricensis, Rhamdia laticauda and Joturus pichardi) along the elevation gradient. The habitat availability and the integration of ecomorphological, feeding and reproductive traits help to explain better the elevation distribution of the complete set of species observed. Although it is possible to identify groups of species characteristic of each reach of river, this does not mean that they are isolated from each other. Natural drift and movement along the river of some species during their life cycle, especially S. altum, A. monticola and J. pichardi, are key processes linking the whole watershed. The present study constitutes a first step in documenting and understanding the distribution and composition of fish assemblages in a watershed that is relatively intact and well-conserved in the Caribbean versant of Costa Rica.

ICHTHYOFAUNA OF TRIBUTARY STREAMS OF THE CINZAS RIVER BASIN, PARANAPANEMA RIVER, BRAZIL

2021 ◽  
Vol 25 (01) ◽  
pp. 142-153
Author(s):  
Dyego Leonardo Ferraz Caetano ◽  
◽  
Edson Fontes de Oliveira ◽  
Cláudio Henrique Zawadzki ◽  
◽  
...  
Keyword(s):  
Species Richness ◽  
River Basin ◽  
Native Species ◽  
Poecilia Reticulata ◽  
Fish Assemblages ◽  
Fish Fauna ◽  
Abundant Species ◽  
Richness Estimators ◽  
Conservation Plans ◽  
First Time

Streams are environments that are very affected by human activities such as pollution, deforestation of riparian forests and introduction of exotic species. In this context, it is important to know its biodiversity for monitoring and conservation. The present study inventoried the fish fauna of three tributary streams of the Jacarezinho River (Cinzas River basin, Paranapanema River) with different environmental characteristics: Água dos Anjos, Monjolinho and Ubá streams. Quarterly collections were performed in the period between October 2012 and July 2013 at the headwaters, in the middle and at the mouth of each stream, using electrofishing. We analyzed the parameters of species richness, total abundance, relative abundance, capture constancy, rarefaction curves of Coleman, and richness estimators ACE and ICE. We captured a total of 7102 individuals, distributed in six orders, 12 families and 33 species. The most abundant order was Characiformes (76.15 %), while the most abundant species were: Bryconamericus iheringii (39.5 %), Astyanax bockmanni (19.36 %), and Geophagus brasiliensis (7.52 %). The highest species richness was found in Água dos Anjos stream (26), followed by Monjolinho stream (25), and the Ubá stream (15). We recorded the occurrence of four non-native species (Bryconamericus exodon, Gymnotus inaequilabiatus, Poecilia reticulata and Oreochromis niloticus), which represent a risk to the biodiversity of the studied streams. The Ubá stream was considered the most conserved, but the presence of P. reticulata shows that it has also suffered from anthropic impacts. This non-native species is constantly associated to degraded environments, mainly when it occurs in high abundance. Our results suggest that the fish assemblages studied present different structures, probably due to the interaction among historical, abiotic, biotic, and anthropic factors. This study has been carried out for the first time in the Cinzas River basin and can help provide theoretical input for the elaboration of monitoring and conservation plans.

scholarly journals Variations in the Distribution and Genetic Relationships among Luciola unmunsana Populations in South Korea

Land ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 730
Author(s):  
Tae-Su Kim ◽  
Kwanik Kwon ◽  
Gab-Sue Jang
Keyword(s):  
South Korea ◽  
Genetic Relationships ◽  
Abundant Species ◽  
Mountain Range ◽  
Eastern Region ◽  
Landscape Conservation ◽  
Conservation Area ◽  
Ecological Landscape ◽  
Close Genetic Relationship ◽  
East West

The firefly species Luciola unmunsana was first discovered on the Unmunsan Mountain in Cheongdo-gun, Gyeongsangbuk-do, South Korea and consequently named after the mountain. The population and habitats of this once-abundant species have recently decreased significantly due to light and environmental pollution caused by industrialization and urbanization. This study investigated the distribution and density of L. unmunsana around the ecological landscape conservation area of the Unmunsan Mountain. Additionally, we conducted molecular experiments on regional variations, genetic diversity and phylogenetic relationships among the various populations of L. unmunsana in South Korea. The genetic relationships among populations were also analyzed using mitochondrial DNA by collecting 15 male adults from each of the 10 regions across South Korea selected for analysis. Differences were observed between populations in the east, west and south of the Baekdudaegan Mountain Range. The firefly populations collected from the eastern region, which included Gyeongsang-do, showed a close genetic relationship with fireflies collected from the Unmunsan Mountain. Thus, the findings of this study can be used as baseline data for re-introducing L. unmunsana to the Unmunsan Mountain.

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