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T L F Pinto - One of the best experts on this subject based on the ideXlab platform.
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feeding selectivity of Ichthyofauna in a tropical stream space time variations in trophic plasticity
Community Ecology, 2011Co-Authors: Virginia Sanches Uieda, T L F PintoAbstract:In studies on the partitioning of resources, one issue which has been largely neglected is the change in feeding habits based on the availability of food in the environment, an aspect which is dealt with here with regard to the Ichthyofauna of a tropical stream. Feeding preference was analyzed for eight species of fish which consumed high percentages of aquatic insects, based on a collection of fish and invertebrates during both the dry season (June 2006) and the wet season (December 2006) and in two different stretches of the stream, one of which shaded by gallery forest (“closed area”) and the other just bordered by herbaceous vegetation (“open area”). Based on a quantitative analysis of the composition of the benthic fauna and the diet of the Ichthyofauna, the electivity index was calculated in order to assess potential alterations in the feeding preferences in line with seasonal and spatial modifications to the structure of the habitat and the supply of food. The analysis of the abundance of aquatic i...
Virginia Sanches Uieda - One of the best experts on this subject based on the ideXlab platform.
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influence of habitat connectivity and seasonality on the Ichthyofauna structure of a riverine knickzone
Iheringia Serie Zoologia, 2018Co-Authors: Eduardo Meneguzzi Brambilla, Virginia Sanches Uieda, Marcos Gomes NogueiraAbstract:Knickzone areas are originated from basaltic outcroppings, present runs, riffles, and pools and are highly influenced by flood pulses, which maintain its natural dynamic. However, the construction of hydroelectric power plants alters or eliminate this dynamic and can affect the resident fauna that may be dependent on it. The aim of this study was to evaluate the organization of a knickzone’s Ichthyofauna considering the influence of seasonality and connectivity of habitats. The study was performed in a knickzone located in the Sapucai-Mirim River, Southeast Brazil. We sampled four rocky pools connected to the river and three isolated, during rainy and dry conditions. The analysis of the two factors (connectivity and seasonality) and of their interaction showed a significant influence only for seasonality on fish structure, with higher values of richness and abundance in rainy season. This Ichthyofauna structure differs from that reported in other stretches of Sapucai-Mirim River, in knickzone were sampled 23% of the total fish species richness known for this river and were reported five new species records. Our results indicate the potential importance of basaltic knickzones for regional fish diversity conservation. Further studies and protection strategies of this kind of environment are necessary, especially due to the imminent threat by intensive hydropower reservoir construction.
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feeding selectivity of Ichthyofauna in a tropical stream space time variations in trophic plasticity
Community Ecology, 2011Co-Authors: Virginia Sanches Uieda, T L F PintoAbstract:In studies on the partitioning of resources, one issue which has been largely neglected is the change in feeding habits based on the availability of food in the environment, an aspect which is dealt with here with regard to the Ichthyofauna of a tropical stream. Feeding preference was analyzed for eight species of fish which consumed high percentages of aquatic insects, based on a collection of fish and invertebrates during both the dry season (June 2006) and the wet season (December 2006) and in two different stretches of the stream, one of which shaded by gallery forest (“closed area”) and the other just bordered by herbaceous vegetation (“open area”). Based on a quantitative analysis of the composition of the benthic fauna and the diet of the Ichthyofauna, the electivity index was calculated in order to assess potential alterations in the feeding preferences in line with seasonal and spatial modifications to the structure of the habitat and the supply of food. The analysis of the abundance of aquatic i...
Telton Pedro Anselmo Ramos - One of the best experts on this subject based on the ideXlab platform.
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Ichthyofauna of the Mamanguape river basin, Northeastern, Brazil
2018Co-Authors: Leonardo Oliveira-silva, Telton Pedro Anselmo Ramos, Yuri Gomes Ponce Carvalho-rocha, Katherine Morais Porto Viana, Raizze Da Costa Avellar, Robson Tamar Da Costa RamosAbstract:Abstract: The Mamanguape River Basin is located in a peripheral semi-arid area of South America, with its headwaters and middle reaches running through the Caatinga (from wetter to drier) and its lower reaches through the Atlantic Forest. The objective of this study was to inventory the fish fauna of the Mamanguape river basin through a comprehensive sampling and to discuss its Ichthyofaunal dominance pattern. Sampling was conducted between 2015 and 2016 at 38 points throughout. The main river course was sampled at 18 fixed points during two expeditions (dry and wet seasons) using traw nets, cast nets, and dip nets, with a standardized effort. The tributaries were sampled during the dry season at 20 points using an adaptaptation of the AquaRAP methodology. A total of 32 freshwater fish species belonging to 26 genera, 16 families and six orders were recorded, predominantly from the order Characiformes and the family Characidae. Astyanax fasciatus had widest distribution and greatest abundance in the basin. Siluriformes were the second most prevalent order, with five species recorded. Cichla cf. monoculus, Poecilia reticulata and Oreochromis niloticus were non-native records for the basin. Apareiodon davisi, an Endangered species, was recorded.
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Continental Ichthyofauna from the Paraíba do Norte River basin pre-transposition of the São Francisco River, Northeastern Brazil
2018Co-Authors: Telton Pedro Anselmo Ramos, Silvia Yasmin Lustosa Costa, Marcio Joaquim Da Silva, Raizze Da Costa Avellar, Jéssica Alcoforado De Sena Lima, Leonardo Oliveira-silvaAbstract:Abstract: Freshwater Ichthyofauna from Brazil Northeast region was considered as being poorly known until recent years, with a considerable number of publications becoming available in the last decade. The present study provides an inventory of freshwater fish species from the Paraíba do Norte River basin located in Paraíba State, Brazil. This inventory is intended to contribute to the of knowledge to the regional fish diversity, pre-transposition of the São Francisco River. Collecting data was obtained from ichthyological databases of both national and foreign institutions. A total of 47 freshwater fish species are registered within the Paraíba do Norte River basin, represented by 38 genera, 20 families and six orders. Characiformes, comprising 47% (22 species), Cichliformes, and Siluriformes are among the most representative orders, 19% (9 species) each, of total recorded species. Seven species of Cichliformes are reported as introduced species in this basin. Cyprinodontiformes and Gobiiformes also registered in this region and correspond to 5% (two species) and Gymnotiformes, Perciformes and Synbranchiformes, 2% (one species each) of total recorded species. Paraíba do Norte River basin stands out in the current national scenario as it comprises the first region from the Mid-Northeastern Caatinga freshwater ecoregion to receive water from the transposition of the São Francisco River. The current inventory is important as it provides scientific data related to the Ichthyofauna of Paraíba do Norte River basin prior to the commencement of the river transposition process. An identification key is also given for the freshwater fish species of the region.
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Composition of the Ichthyofauna in Brazilian semiarid reservoirs
2017Co-Authors: Silvia Yasmin Lustosa Costa, José Etham De Lucena Barbosa, Leandro Gomes Viana, Telton Pedro Anselmo RamosAbstract:Abstract The scale of impact that the São Francisco River transposition project will have on the drainage basins Ichthyofauna is still unclear, however, changes in the fish community diversity and abundance is probable. Surveys and registries of the fish fauna within key systems of the catchment basins are priority actions for the conservation of the aquatic diversity. This study conducted a taxonomic survey of the Epitácio Pessoa (Boqueirão municipality) and Argemiro de Figueiredo (Itatuba municipality), reservoirs Ichthyofauna, both belonging to the Paraíba do Norte River basin, important socioeconomic and environmental systems for the transposition project. Monthly sampling was carried out between October/2014 to September/2015 in the upstream and downstream zones of the reservoirs. The specimens were collected using dip nets, drag nets, and sieves, and placed on ice in the field. Later in the laboratory, they were transferred to 10% formaldehyde and then preserved in 70% alcohol. A total of 2,328 specimens were collected representing five orders, 14 families, and 31 species in both systems. At the upstream zones 2057 specimens were collected representing 17 species, and at the downstream zones 271 specimens were collected representing 24 species. Of the 31 species recorded, 13 species are endemic to watersheds that drain rivers from the Brazilian semi-arid region, and seven species (Apareiodon davisi, Characidium bimaculatum, Hypostomus pusarum, Parotocinclus jumbo, P. spilosoma, Pimelodella enochi, and Prochilodus brevis) are endemic to the Mid-Northeastern Caatinga Ecoregion (MNCE). Among the latter, Parotocinclus spilosoma and Pimelodella enochi are endemic to the Paraíba do Norte River. Apareiodon davisi is classified as Endangered according to the current published Brazil’s official list of endangered species of fish and aquatic invertebrates. This pre-transposition ichthyofaunistic survey will serve as a basis for future post-transposition analyzes, considering this action will change the scope of the ecosystems diversity.
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Ichthyofauna of serido borborema a semi arid region of brazil
Biota Neotropica, 2014Co-Authors: Marcio Joaquim Da Silva, Telton Pedro Anselmo Ramos, Virginia Dantas Diniz, Robson Tamar Da Costa Ramos, Elvio Sergio Figueredo MedeirosAbstract:The Serido/Borborema region is located between the States Paraiba and Rio Grande do Norte and a priority area for conservation of the Caatinga. This region is under the hydrological influence of the middle portion of Piranhas-Acu River basin. Previous systematic inventories of the Ichthyofauna of this Caatinga’s area are not significant. The Caatinga fish fauna is threatened due the advancement of historic anthropogenic activities, mainly agricultural. Furthermore, another relevant aspect is the recent governmental decision of transferring water from Sao Francisco River to other Northern river basins, which includes the Piranhas-Acu basin. This study performed a systematic survey of the Serido/Borborema’s Ichthyofauna. The sites were sampled during the years 2006 and 2007 (four annual, diurnal samples), using three different types of gear: beach seine nets, cast net and gillnets. We captured 13,009 individuals of 5 orders, 14 families, 28 genera and 35 species of fish. The predominant orders were Characiformes (21 species), Siluriformes (6) and Perciformes (5). The greatest number of species (11) was catch from the family Characidae, followed by Cichlidae (5) and Loricariidae (4). This inventory produced a comprehensive sampling of the middle portion of Piranhas-Acu River basin and its result overcomes the diversity reported in previous studies (22 species) on the same region.
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Ichthyofauna of the parnaiba river basin northeastern brazil
Biota Neotropica, 2014Co-Authors: Telton Pedro Anselmo Ramos, Robson Tamar Da Costa Ramos, Stefane Almeida Q A RamosAbstract:The Parnaiba River is the largest hydrographic basin with its limits entirely within the northeastern region of Brazil. It is one of the few perennial rivers in the Brazilian Northeastern Region, running predominantly in the area of Caatinga on the eastern portion (with intermittent drainages associated to this type of environment), and partly extending into the Cerrado region on the western portion. The objective of this study was to describe the diversity of freshwater fishes of the Parnaiba River basin by conducting a comprehensive Ichthyofauna inventory of the basin. The sampling design of this study was based on the placement of (1) Fixed Sites for seasonal collection (dry and wet season, two years) in the three portions of the main course of the Parnaiba River, and (2) “Aquarap” protocol collections which covered the entire basin. The collection effort consisted of 244 sampling sites surveyed along the entire basin between the years 2004 and 2011. Fish were collected with the use of seines, cast nets, gill nets and dip nets; only the first two fishing gears were used in Fixed Sites. As a result, 146 species of freshwater fish were recorded in the Parnaiba River basin, distributed in 103 genera, 36 families and 11 orders. The registered endemism reached a total of 54 species.
A. V. Datsky - One of the best experts on this subject based on the ideXlab platform.
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Ichthyofauna of Russian exclusive economic zone of the Bering Sea: 2. Ecological and zoogeographical characteristics
Journal of Ichthyology, 2016Co-Authors: A. V. DatskyAbstract:The ecological and zoogeographical characteristics of 344 species of Pisces and fish-like species comprising the Ichthyofauna of the Bering Sea (Russian Exclusive Economic Zone) are presented for the study period of 1995−2012 (original studies) and those for previous findings in this area. The benthic species (elittoral, mesobenthic, and sublittoral; 216 species, or 62.8%) dominate if one takes into account the biotopic characteristics of the species; the majority belongs to the wide-boreal Pacific, wide-boreal Asiatic, and arcticboreal species (255 species, or 74.1%) by the zoogeographic characteristics. The comparative analysis of the fish communities of the western Bering Sea evidences to the significant changes of the Ichthyofauna within the depth southwards Navarin Cape. Arctic-boreal species can be considered as a specific faunistic “margin” between the northern and the southern Ichthyofauna of the western Bering Sea due to their eurybiont characteristics.
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Ichthyofauna of the Russian exclusive economic zone of the Bering Sea: 1. Taxonomic diversity
Journal of Ichthyology, 2015Co-Authors: A. V. DatskyAbstract:The species list of Ichthyofauna of the Russian exclusive economic zone of the Bering Sea has been developed using the original data obtained in 1995–2012 and the data published since the very beginning of the studies in this region. The species list includes 344 species belonging to 188 genera, 65 families, and 23 orders. The diversity of the Ichthyofauna of the western Bering Sea, calculated under the ratio of species, genera, and families, is significantly higher than that observed for the Arctic seas, the seas of the European part of Russia (except the Caspian Sea), and the Sea of Japan. It is similar to the diversity of the Ichthyofauna of coastal waters of the northern Kuril Islands and the northern Sea of Okhotsk. The maximal diversity has been found for scorpion fishes and sculpins (Scorpaeniformes), perch-like fishes (Perciformes), salmons (Salmoniformes), flatfishes (Pleuronectiformes), and cods and hakes (Gadiformes). These orders comprise 33 families (50.8% of total number of families), 139 genera (73.9% of total number of genera), and 279 species (81.1% of total number of species) in total. The maximal diversity belongs to the scorpion fishes and sculpins and the perch-like fishes; they dominate absolutely by the number of the lower-order taxa (families, genera, and species). Such families as sculpins (Cottidae), eelpouts (Zoarcidae), snailfishes (Liparidae), righteye flounders (Pleuronectidae), pricklebacks (Stichaeidae), and poachers (Agonidae) are presented by 175 species, or comprise 50.9% of the total diversity of Ichthyofauna.
Carnevale Giorgio - One of the best experts on this subject based on the ideXlab platform.
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UPPER CENOMANIAN FISHES FROM THE BONARELLI LEVEL (OAE2) OF NORTHEASTERN ITALY
2020Co-Authors: Amalfitano Jacopo, Giusberti Luca, Fornaciari Eliana, Carnevale GiorgioAbstract:The Bonarelli Level (BL) is a radiolarian-ichthyolithic, organic-rich marker bed that was deposited close to the Cenomanian/Turonian boundary (CTB) representing the sedimentary expression of the global Ocea - nic Anoxic Event 2 (OAE2). In northeastern Italy this horizon yielded fossil remains documenting a rather diverse Ichthyofauna. The assemblage was studied by Sorbini in 1976 based on material from a single locality, Cinto Euganeo. Subsequently, other localities yielding fish remains have been discovered. Our revision also includes fish remains from three new fish-bearing localities, the Carcoselle Quarry, the Valdagno-Schio tunnel and Quero other than those from Bomba Quarry near Cinto Euganeo. At least 27 taxa were identified, including nine previously not reported from the Bonarelli Level, namely: Scapanorhynchus raphiodon , Cretalamna appendiculata , Archaeolamna kopingensis , ‘ Nursallia ’ tethysensis , Belonostomus sp., Dixonanogmius dalmatius , ‘ Protosphyraena ’ stebbingi and the beryciform Hoplopteryx sp. The overall assem - blage mostly consists of crossognathiforms, tselfatiiforms and aulopiforms. A comparison of the taxonomic diversity with coeval assemblages evidences a general similarity with nearby western Tethyan fish assemblages and especially with the Jbel Tselfat Ichthyofauna, although some of the taxa are exclusively shared with the assemblages of the boreal realm (English Chalk, Westphalia and Saxony). However, additional information would be necessary to more properly define the main global ichthyogeographic patterns during the Cenomanian
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UPPER CENOMANIAN FISHES FROM THE BONARELLI LEVEL (OAE2) OF NORTHEASTERN ITALY
Università degli Studi di Milano, 2020Co-Authors: Amalfitano Jacopo, Giusberti Luca, Fornaciari Eliana, Carnevale GiorgioAbstract:The Bonarelli Level (BL) is a radiolarian-ichthyolithic, organic-rich marker bed that was deposited close to the Cenomanian/Turonian boundary (CTB) representing the sedimentary expression of the global Oceanic Anoxic Event 2 (OAE2). In northeastern Italy this horizon yielded fossil remains documenting a rather diverse Ichthyofauna. The assemblage was studied by Sorbini in 1976 based on material from a single locality, Cinto Euganeo. Subsequently, other localities yielding fish remains have been discovered. Our revision also includes fish remains from three new fish-bearing localities, the Carcoselle Quarry, the Valdagno-Schio tunnel and Quero other than those from Bomba Quarry near Cinto Eugeneo. At least 28 taxa were identified, including nine previously not reported from the Bonarelli Level, namely: Scapanorhynchus raphiodon, Cretalamna appendiculata, Archaeolamna kopingensis, ‘Nursallia’ tethysensis, Belonostomus sp., Dixonanogmius dalmatius, ‘Protosphyraena’ stebbingi and the beryciform Hoplopteryx sp. The overall assemblage mostly consists of crossognathiforms, tselfatiiforms and aulopiforms. A comparison of the taxonomic diversity with coeval assemblages evidences a general similarity with nearby western Tethyan fish assemblages and especially with the Jebel Tselfat Ichthyofauna, although some of the taxa are exclusively shared with the assemblages of the boreal realm (English Chalk, Westphalia and Saxony). However, additional information would be necessary to more properly define the main global ichthyogeographic patterns during the Cenomanian
