Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina

The Pampa Plain, in the central region of Argentina, is mostly drained by the Salado River. The fish fauna of this river is mostly known from field collections in lower reach lakes. Consequently, we aimed to explore the composition and structure of the fish assemblages in the upper Salado River lakes. Patterns in dominance and persistence of species and assemblage level attributes were correlated with environmental and human activity-derived (NO3:NH4) variables. Overall, 19,913 individuals of 17 species included in 5 orders and 11 families were collected. Several species are first records for the upper Salado River lakes. There was a marked proliferation of species in the family Characidae. Conversely, the remainder 10 families were only represented by one or two species. The species composition along the study lakes changed slightly but their relative contribution to the total fish collected (dominance) varied greatly. Rather few species were present in all collections suggesting an important interannual variability in assemblage stability. The gradient in water conductivity was an important factor for the persistence of particular species in the lakes. The gradients in water conductivity and NO3:NH4 ratio were associated with particular fish communities dominated by different groups of species. These results suggest that even when broad management and conservation strategies should encompass the system as a whole, lake-specific approaches must also be addressed. Overall, our results highlight that human impacts on surface waters may interact with environmental factors to influence the dynamics of fish species and the structure of their communities.

Download Full-text

Fish fauna from the Langueyú basin, Argentina: a prairie stream in a heavily modified landscape

Check List ◽

10.15560/14.2.461 ◽

2018 ◽

Vol 14 (2) ◽

pp. 461-470 ◽

Cited By ~ 1

Author(s):

Andrea Bertora ◽

Fabián Grosman ◽

Pablo Sanzano ◽

Juan J. Rosso

Keyword(s):

River Basin ◽

Fish Species ◽

Surface Waters ◽

Fish Fauna ◽

Land Uses ◽

Pampa Plain ◽

Salado River ◽

Prairie Stream ◽

Representative Family

On the Pampa plain, one of the most productive modified areas of Argentina, important changes in land uses have drastically altered the landscape during the last decades. This has led to an increased deterioration of surface waters affecting fish that inhabit them. We provide a list of fish species inhabiting an unsurveyed prairie stream of this region. Environmental variables were measured and fish samplings were conducted in 3 sites of the Langueyú stream. A total of 15 species belonging to 10 families and 6 orders were collected. Characiformes and Siluriformes were the richest orders. Characidae was the most representative family. Species richness was highest when compared with other similar regional environments without connection with the Salado river basin. Most of the fish species collected are typical of the region but others are species which typically do not progress beyond the Salado river basin. The role of human intervention in fish species distribution is discussed.

Download Full-text

Regional and Seasonal Differences in Species Composition and Trophic Groups for Tidepool Fishes of a Western Pacific Island – Taiwan

ILMU KELAUTAN Indonesian Journal of Marine Sciences ◽

10.14710/ik.ijms.23.1.1-18 ◽

2018 ◽

Vol 23 (1) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Colin K. C. Wen ◽

Li-Shu Chen ◽

Kwang-Tsao Shao

Keyword(s):

Species Composition ◽

Fish Species ◽

Fish Assemblages ◽

Coastal Development ◽

Species Number ◽

Pacific Region ◽

Trophic Groups ◽

Species Numbers ◽

Intertidal Fish ◽

Intertidal Fishes

Spatial and temporal variations in the species composition of assemblages are common in many marine organisms, including fishes. Variations in the fish species composition of subtidal coral reefs have been well documented, however much less is known about such differences for intertidal fish assemblages. This is surprising, given that intertidal fishes are more vulnerable to terrestrial human disturbances. It is critical to evaluate the ecology and biology of intertidal fishes before they are severely impacted by coastal development, especially in developing countries such as those in the tropical western Pacific region where coastal development is rapidly increasing. In this study, we investigated the species composition, abundance, biomass and species number (richness) for intertidal fish assemblages in subtropical (northern) and tropical (southern) Taiwan across four seasons by collecting fishes from tidepools using clove oil. We also examined the gut contents of collected fishes to identify their trophic functional groups in order to investigate regional and seasonal variations for different trophic groups. We found significant differences in the species composition of tidepool fish assemblages between subtropical and tropical Taiwan. Bathygobius fuscus, Abudefduf vaigiensis and Istiblennius dussumieri were dominant species in subtropical Taiwan, whereas Bathygobius coalitus, Abudefduf septemfasciatus and Istiblennius lineatus were dominant in tropical Taiwan. Other species such as Bathygobius cocosensis, Abudefduf sordidus and Istiblennius edentulus were common in both regions. For trophic groups, omnivores and detritivores had or showed trends towards higher species numbers and abundances in the subtropical region, whereas herbivores, planktivores and general carnivores had or showed trends towards higher species numbers and biomass in the tropical region. Overall, many intertidal fish species and trophic groups showed differences in abundance, biomass and species number between subtropical and tropical Taiwan. Further studies on large scale geographical gradients in trophic groups and species compositions in the Indo-west Pacific region are encouraged to assist with ecosystem monitoring and assessment. Keywords: Intertidal fishes, spatio-temporal pattern, feeding guild, diet

Download Full-text

The fish fauna of streams in the Madeira-Purus interfluvial region, Brazilian Amazon

Check List ◽

10.15560/11022 ◽

2011 ◽

Vol 7 (6) ◽

pp. 768 ◽

Cited By ~ 4

Author(s):

Daniela de França Barros ◽

Jansen Zuanon ◽

Fernando Pereira De Mendonça ◽

Helder Mateus Viana Espírito Santo ◽

André Vieira Galuch ◽

...

Keyword(s):

Species Richness ◽

Species Composition ◽

Fish Fauna ◽

Brazilian Amazon ◽

Neotropical Region ◽

Environmental Conservation ◽

Taxonomic Group ◽

Conservation Strategies ◽

Species Richness And Diversity ◽

High Species Richness

Small headwaters streams of the Neotropical region usually have high species richness and diversity. This study aimed to investigate the species composition and abundance of fish fauna in the headwaters streams of the Madeira-Purus interfluvial plain in the Brazilian Amazon. A total of 22 streams of 1st to 3rd order were sampled during two expeditions at two separate locations in April-May and July of 2007. A total of 5508 fishes were captured using hand and small seine nets, belonging to 78 species, 22 families and six orders. Characiformes was the most diverse taxonomic group in the samples, followed by Gymnotiformes and Siluriformes. Our findings indicate that the fish fauna of streams in the Madeira- Purus interfluvial plain is both rich and diverse and should be considered during the implementation of strengthened environmental conservation strategies in this region.

Download Full-text

Historical Changes in Large River Fish Assemblages of the Americas

Historical Changes in Large River Fish Assemblages of the Americas ◽

10.47886/9781888569728.ch28 ◽

2005 ◽

Keyword(s):

Fish Species ◽

Fish Assemblages ◽

Sewage Treatment ◽

Fish Fauna ◽

Large River ◽

Water Volume ◽

Mean Width ◽

Minas Gerais State ◽

The World ◽

Annual Discharge

Abstract.—The Rio das Velhas is a tributary of the Rio São Francisco, one of Brazil’s largest rivers. It is the Rio São Francisco’s second most important tributary in water volume (mean annual discharge of 631 m3/s), with a drainage area of 27,867 km2, length of 761 km, and mean width of 38 m. Like many other rivers around the world, it became heavily polluted in the 1900s. The Rio das Velhas is the most polluted river of Minas Gerais state because the basin contains approximately 4.5 million people. Unlike other Brazilian rivers, its fish fauna was studied from 1850 to 1856. Fifty-five fish species were recorded; 20 of them were first described at that time, when there were previously no more than 40 known species in the entire São Francisco basin. Recent fish collections, approximately 150 years later, indicate 107 fish species, but some may be locally extinct. There are good prospects of rehabilitating this fauna because of the connectivity of the Rio das Velhas with the São Francisco main stem, its well-preserved tributaries, and increased investments in sewage treatment.

Download Full-text

Estuarine characteristics, water quality and heavy metal contamination as determinants of fish species composition in intermittently open estuaries

Marine and Freshwater Research ◽

10.1071/mf15409 ◽

2017 ◽

Vol 68 (5) ◽

pp. 941 ◽

Cited By ~ 5

Author(s):

K. O'Mara ◽

A. Miskiewicz ◽

M. Y. L. Wong

Keyword(s):

Water Quality ◽

Species Composition ◽

Fish Species ◽

Metal Contamination ◽

Fish Assemblages ◽

Anthropogenic Activities ◽

Estuarine Fish ◽

Fish Diversity ◽

Eastern Australia ◽

Fish Species Composition

Estuaries are critical aquatic environments that are used by many fish during their life cycle. However, estuaries often suffer from poor water quality as a result of anthropogenic activities. Fish diversity studies in estuaries are common, although few have examined whether correlations exist between water quality, metal contamination and fish assemblages. In the present study we investigated the effect of abiotic conditions, heavy metals and estuary characteristics on the abundance, diversity and composition of fish in four intermittently open estuaries along the Illawarra coast of south-eastern Australia. The heterogeneity of environmental conditions was reflected in the fish assemblages in each estuary. Environmental variables predicted fish species composition, and estuaries in particularly poor condition contained few species (estuarine residents) in high abundance, indicating their ability to acclimatise and survive in conditions that are hostile to other species. Overall, these findings demonstrate that estuarine fish assemblages may be useful indicators of estuary condition and reveal the importance of managing anthropogenic activities in the surrounding catchment to improve water quality so that biodiversity of fish can be restored in these estuarine environments.

Download Full-text

Fishes of the Astrakhan Nature Reserve: an updated checklist with comments of recent records

Zoosystematica Rossica ◽

10.31610/zsr/2017.26.1.182 ◽

2017 ◽

Vol 26 (1) ◽

pp. 182-195

Author(s):

S.A. Podolyako ◽

V.V. Fedorovich

Keyword(s):

Species Composition ◽

Fish Species ◽

Nature Reserve ◽

New Records ◽

Fish Fauna ◽

Spined Loach ◽

First Finding

Since publication of the previous list (Litvinov & Podolyako, 2013), new data on species composition of fish fauna in the Astrakhan State Reserve have been obtained. As a result of revisions of the collected material and new records (e.g., the first finding of Khvalyn spined loach Cobitis amphilekta Vasil’eva, Vasil’ev, 2012), the list of fish species has been corrected and widened. At present, the list of fish species in the Reserve includes one species of Petromyzontidae and 60 species of Acipenseridae, Clupeidae, Cyprinidae, Cobitidae, Siluridae, Coregonidae, Salmonidae, Esocidae, Lotidae, Atherinidae, Gasterosteidae, Syngnathidae, Percidae, and Gobiidae. Identifications used in previous lists of fishes found in the Astrakhan reserve in 1936–2016 and brief information on biology and dates of latest records of each species are given.

Download Full-text

Transformation of Dnepr (Zaporizhia) reservoir`s fish fauna: retrospective review and current status

Ecology and Noospherology ◽

10.15421/031615 ◽

2016 ◽

Vol 27 (3-4) ◽

pp. 70-76

Author(s):

O. N. Marenkov

Keyword(s):

New Species ◽

Species Composition ◽

Fish Species ◽

Fish Fauna ◽

Second World War ◽

Fourth Stage ◽

World War ◽

Number Of Species ◽

Fishery Exploitation ◽

Second World

Creation of reservoirs by regulation of the Dnieper River and small rivers caused significant changes in the conditions of existence and affected on fish biodiversity of pondsof Prydniprovya. To the anthropogenic factors influencing the species composition of fish fauna factors of technical and fishery character can be included. Technical impact on water bodies is associated with the creation of new artificial lakes, ecosystems of which are not stable and are influenced by invasive processes. Fisheries management measures include work on the introduction of new species of fish that primarily have economic importance for the development of industrial fishing. Work on the introduction of new species have both positive and negative effects, but nevertheless new species affect natively on fish fauna. This transforms biota of reservoir and creates conditions for further spread of new species, increasing their numbers, creating new ecological relationships in the ecosystem of the pond. In the formation of the Dnieper (Zaporizhia) reservoir`s fish fauna it is traditionally defined five stages: the first stage is before building a dam to the Dnieper (until 1931) when there was a natural Dnieper rapids area, inhabited by migratory, semi-migratory and local fish; the second stage is the beginning of formation of reservoir`s fish fauna with the gradual disappearance of reophilic and dominance of limnophilic species (1931–1941); the third stage is the restoration of fish populations of Dnieper rapids due to destruction of dam during the Second World War (1941–1947); fourth stage is the secondary formation of ichtiocenosis of reservoir after recovery of dam (1947–1960); fifth stage is reforming of the structure of fish fauna in terms of cascade (creation of Dnieper reservoirs) and anthropogenic pressures (from 1961 to the present period). The first stage is defined by period of filling the reservoir. After the construction of Zaporozhye hydroelectric station the process of rebuilding fish fauna took place. In the early years of the reservoir existence migratory and semi-migratory fish have naturally disappeared. The species composition of fish fauna has decreased by 11 taxons. The number of reophilic species has markedly reduced and remained predominantly in the upper river part of the reservoir. The lower part of reservoir with sustained hydrological regime has been being actively assimilated by fish of limnophilic complex. The second and third stages are associated with the destruction of the dam during the Second World War and the short restoration of hydrobiological regime of Dnieper rapids, until the re-filling of the reservoir and its final transformation into a regulated pond. The flow of these two phases has not influenced significantly the structure of industrial ichtyocomplex total number of species at that time was 38 taxons. The fourth stage involves fishery exploitation of reservoir. With the aim of the purposeful impact on formation of industrial fish fauna of the Dnieper (Zaporizhia) reservoir, considering sufficient development of natural fodder the works on artificial introduction of new species were carried out in the years 1950-1960. The fifth stage of development and current state of fish fauna of reservoir is characterized by the emergence and spread of invasive species. During the period of existence of the Dnieper (Zaporizhia) reservoir ichthyofauna of the reservoir has substantially transformed. In the modern fish fauna of reservoir there are 52 species of fish which are representatives of 14 families. Compared with the period of existence of Dnieper River before its regulation the number of species remained at the same level, but the species composition and structure of fish fauna changed drastically due to the loss of some species and the emergence of other species, mostly unwanted invaders. Changing the number of species is related to several factors. Firstly, process of spread of species upstream took place after the disappearance of Dnieper Rapids and rise of mineralization. Secondly, with the deliberate introduction of fish with purpose of fishery exploitation of the reservoir, and as a consequence randomly invasion of some species that came from fish farms. Thirdly, emergence of new species is also connected with the deliberate release of fish to the open water, similarly Pumpkinseed Sunfish Lepomis gibbosus (Linnaeus, 1758) has appeared in the Dnipro (Zaporizhia) reservoir, which is well acclimatized and has broadly extended its habitat in reservoirs of Dnipropetrovsk region. Today about 31 % of fish species of Dnieper (Zaporizhia) reservoir is adventitious. The process of genesis of fish fauna of the Dnieper (Zaporizhia) reservoir is still ongoing and it is connected with the subsequent emergence of new species and rise of their numbers. Such changes in the fish fauna of reservoir can harm fisheries because the vast majority of fish aliens are competitors by food for young commercially valuable fish species.

Download Full-text

Fish complementarity is associated to forests in Amazonian streams

Neotropical Ichthyology ◽

10.1590/1982-0224-20140157 ◽

2015 ◽

Vol 13 (3) ◽

pp. 579-590 ◽

Cited By ~ 13

Author(s):

Carolina Rodrigues Bordignon ◽

Lilian Casatti ◽

María Angélica Pérez-Mayorga ◽

Fabrício Barreto Teresa ◽

Gabriel Lourenço Brejão

Keyword(s):

Habitat Use ◽

Functional Traits ◽

Fish Species ◽

Environmental Variables ◽

Fish Assemblages ◽

Fish Fauna ◽

Functional Structure ◽

Structure Of Communities ◽

Net Relatedness Index ◽

Functional Homogenization

The functional structure of communities is commonly measured by the variability in functional traits, which may demonstrate complementarity or redundancy patterns. In this study, we tested the influence of environmental variables on the functional structure of fish assemblages in Amazonian streams within a deforestation gradient. We calculated six ecomorphological traits related to habitat use from each fish species, and used them to calculate the net relatedness index (NRI) and the nearest taxon index (NTI). The set of species that used the habitat differently (complementary or overdispersed assemblages) occurred in sites with a greater proportion of forests. The set of species that used the habitat in a similar way (redundant or clustered assemblages) occurred in sites with a greater proportion of grasses in the stream banks. Therefore, the deforestation of entire watersheds, which has occurred in many Amazonian regions, may be a central factor for the functional homogenization of fish fauna.

Download Full-text

Status of Endemic Freshwater Fish Fauna Inhabiting Major Lakes of Turkey under the Threats of Climate Change and Anthropogenic Disturbances: A Review

Water ◽

10.3390/w13111534 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1534

Author(s):

Daniela Giannetto ◽

Deniz Innal

Keyword(s):

Freshwater Fish ◽

Fish Species ◽

Native Species ◽

Fish Assemblages ◽

Fish Communities ◽

Fish Fauna ◽

Current Status ◽

Global Issue ◽

Freshwater Fish Fauna ◽

Endemic Fish

Due to its peculiar geographical position and its environmental heterogeneity, Turkey represents an important biodiversity hotspot for freshwater fish fauna. Unfortunately, native fish communities of Turkey, mainly from lentic ecosystems, have been massively altered in the past decades. Furthermore, these species, especially the endemic species, are now threatened by several human activities in addition to the global issue of climatic changes. The aim of this paper is to provide an updated review on the current status of endemic fish species from main lakes of Turkey including major threats affecting fish assemblages. By gathering data from the literature and authors’ personal observations, 62 endemic fish species were reported to occur in the considered 37 Turkish Lakes. The presence of non-native species, agriculture activities, climatic drought, and decreasing water level were found to be the threats that most affect the fish communities of the considered Turkish Lakes.

Download Full-text

Composition and Occurrence of Fish Fauna from Thanbyuzayat Township, Mon Coastal Area

Bionatura ◽

10.21931/rb/2020.05.04.14 ◽

2020 ◽

Vol 5 (4) ◽

pp. 1363-1370

Author(s):

Zarni Ko Ko

Keyword(s):

Species Composition ◽

Fish Species ◽

Dominant Species ◽

Fish Fauna ◽

Important Species ◽

Foreign Countries ◽

Commercially Important ◽

Bombay Duck ◽

Study Sites ◽

Important Fish

A total of 48 species of fish fauna were identified during the present study period. The dominant species of fish were found under order Perciformes in all study areas. The most species composition (40) was recorded in Setse fish landing area. The commercially important fish species were mostly found in Kyaikkhami area. Moreover, 17 species of fish were exported to other regions and foreign countries. Among the fish species, species such as Threadfin (Polynemidae), Croaker (Sciaenidae), Hilsa (Clupeidae), Bombay duck (Harpadontidae), Anchovy (Engraulidae), and Pomfret fish (Stomateidae) were the most economically important species. Bombay duck and Anchovy (especially Coilia dussumieri) were more abundant (70%) at the present study sites. Harpodon nehereus and Coilia species were the leading food employed as fresh and dried for local people in the present study areas. Key words: Ichthyology, Taxonomy, Compositions, Occurrence, fish landing centers, Thanbyuzayat Township, Mon Coastal Areas.

Download Full-text