Fish fauna of small-order streams of savannah and forest fragments landscape in the lower Tapajós River basin, Amazonia

Abstract: To better understand the fish fauna of Amazonian streams, we assessed small streams in a landscape of forest fragments and savannah in the region of the lower Tapajós River, Brazil. We sampled the fish fauna using a well-tested active capture method during two dry seasons (October 2006 and 2018) and one rainy season (March to May 2018). Species richness was calculated using an abundance matrix and first-order jackknife estimator. Using qualitative and quantitative data, we present a cluster analysis in which each stream corresponds to a sampling unit. We collected 6,094 individuals of 43 species distributed in six orders. The sampling effort represents 73% of the estimated richness (58.69 ± 7.65). The most abundant species were Copella nattereri, Iguanodectes variatus and Laimosemion dibaphus that together represent almost half of the total sample (48.7%). The most frequent species were Aequidens epae, Helogenes marmoratus and Laimosemion dibaphus, which were collected in 11 of the 13 sampled streams. This is the first fish fauna list for small-order streams of savannah and forest fragments landscape in Amazonian Brazil. The richness of fish and the presence of many rare species underscore the contribution of small streams to the regional fish fauna composition, even in dynamic and spatially restricted landscapes.

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New records of fishes for Trindade-Martin Vaz oceanic insular complex, Brazil

Zootaxa ◽

10.11646/zootaxa.2298.1.3 ◽

2009 ◽

Vol 2298 (1) ◽

pp. 45-54 ◽

Cited By ~ 12

Author(s):

HUDSON T. PINHEIRO ◽

VICTOR CAMILATO ◽

JOÃO LUIZ GASPARINI ◽

JEAN-CHRISTOPHE JOYEUX

Keyword(s):

Population Size ◽

New Records ◽

Fish Fauna ◽

Abundant Species ◽

Temporal Variations ◽

Brazilian Coast ◽

Sampling Effort ◽

Stepping Stones ◽

Coastal Species ◽

Deep Reefs

Thirty-two new records for shore fishes were made at the Trindade-Martin Vaz oceanic insular complex, located 1,160 km off the Brazilian coast. These records are related to an increase in sampling effort and to temporal variation in population size. Newly found but very abundant species hypothetically exemplify temporal variations in population size. The Vitória-Trindade submarine chain also may function as a series of stepping-stones facilitating transport of typically coastal species. The new records reveal a lack of knowledge of the fish fauna of this unique location. Studies aimed at the exploration of shallow areas, deep reefs and seamounts of the Vitória-Trindade chain, aided by ichthyoplanktonic surveys, are essential to a better understanding of the fish community and the processes of colonization in this oceanic locality.

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Diversidad y patrones de actividad de mamíferos medianos y grandes en la Reserva de la Biosfera La Encrucijada, Chiapas, México

Revista de Biología Tropical ◽

10.15517/rbt.v66i2.33395 ◽

2018 ◽

Vol 66 (2) ◽

pp. 634

Author(s):

Julio C. Hernández Hernández ◽

Cuauhtémoc Chávez ◽

Rurik List

Keyword(s):

Activity Patterns ◽

Biosphere Reserve ◽

Abundant Species ◽

Camera Traps ◽

Sampling Effort ◽

Large Mammals ◽

Dasypus Novemcinctus ◽

Nasua Narica ◽

The Pacific ◽

Dry Seasons

Diversity and activity patterns of medium and large mammals in La Encrucijada Biosphere Reserve, Chiapas, Mexico. In Mexico, wetlands occupy an important portion of the country, among them, mangroves are particularly diverse. La Encrucijada Biosphere Reserve (ENBIRE) is a coastal ecosystem of mangrove located along the Pacific Coastal Plain in the Southwestern portion of Chiapas state. The ENBIRE mangroves are among the most important of the American Pacific Coast, highlighting the role they play in the maintenance of the community of mammals on the coast of the state. There are few studies in Mexico related to the mammals associated with these ecosystems, our aim was to estimate the diversity and activity patterns of medium and large mammals in the ENBIRE. Sampling was conducted from August 2015 to August 2016 using camera traps. We obteined 1 851 independent photographs records, with a total sampling effort of 5 400 trap-days. Nineteen species of mammals were registered belonging to 15 families and seven orders, and five species were new records to the area. Six species present are listed, two as endangered and four as threatened. Interpolation and extrapolation analyzes showed an asymptotic trend in the curves for the rainy and dry seasons. The coverage of the sample for both seasons was 99.9 % and 99.8 %, respectively, indicating that both cases were a representative sample. According to the relative abundance index obtained, the most abundant species were Procyon lotor (IAR = 4.35), Nasua narica (IAR = 3.91), Philander opossum (IAR = 2.04), Cuniculus paca (IAR = 1.89), Didelphis marsupialis (IAR = 1.67) and Dasypus novemcinctus (IAR = 1.02). In terms of patterns of activity C. paca, P. opossum, D. marsupialis and D. novemcinctus were primarily nocturnal; P. lotor showed a tendency towards nocturnal habits but was also recorded during the day; N. narica was mainly diurnal. This information can be useful to the creation of management programs and the conservation of medium and large mammals in the ENBIRE, especially for species at risk. Rev. Biol. Trop. 66(2): 634-646. Epub 2018 June 01.

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Bats in a Cerrado landscape of Northern Brazil: species occurrence, influence of environmental heterogeneity and seasonality, and eight new records for the State of Tocantins

Mammalia ◽

10.1515/mammalia-2017-0023 ◽

2018 ◽

Vol 82 (5) ◽

pp. 469-480 ◽

Cited By ~ 1

Author(s):

Andrea Cecília Sicotti Maas ◽

Luiz Antonio Costa Gomes ◽

Mayara Almeida Martins ◽

Daniela Dias ◽

André Pol ◽

...

Keyword(s):

Mixed Models ◽

Habitat Heterogeneity ◽

New Records ◽

National Level ◽

Monitoring Program ◽

Abundant Species ◽

Sampling Effort ◽

Cerrado Biome ◽

Northern Brazil ◽

Dry Seasons

Abstract Patterns of bat distribution in Cerrado can be influenced by habitat heterogeneity and seasonal variation. We described the bat fauna in Cerrado landscape during an environment-monitoring program in Tocantins State, Northern Brazil. Additionally, we tested the influence of habitat heterogeneity and seasonality on the abundance and species richness of Phyllostomidae in this region by Generalized Linear Mixed Models. In 2010, we sampled 40 nights (rainy and dry seasons) in four vegetation types of Cerrado biome. Taxonomic identification was based on measurements and qualitative diagnostics. With a sampling effort of 43,965 m2·h, we captured 274 bats of 30 species, 22 genera and six families. Carollia perspicillata was the most abundant species captured. Colinas do Tocantins municipality was richer than Goiantins (26 and 19 species respectively). The best model for abundance was the interaction between heterogeneity and seasonality and the best model for richness was a mix between these two variables. We registered eight new species for the Tocantins including three species considered threatened with extinction at national level and one at global level. Such results highlight that this region is important for new investigations on the Cerrado biome.

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The fish fauna of the Jacaré-Guaçu River basin, Upper Paraná River basin

Biota Neotropica ◽

10.1590/s1676-06032011000100010 ◽

2011 ◽

Vol 11 (1) ◽

pp. 103-113 ◽

Cited By ~ 5

Author(s):

André Luiz Henríques Esguícero ◽

Marlene Sofia Arcifa

Keyword(s):

River Basin ◽

Diversity Index ◽

Fish Fauna ◽

Abundant Species ◽

Negative Influence ◽

Fish Diversity ◽

Water Conductivity ◽

Body Depth ◽

Upper Paraná River ◽

Fauna Composition

This study aimed to evaluate the fish fauna composition and distribution in different environments, up- and downstream the Gavião Peixoto Dam, in the Jacaré-Guaçu River basin. Most of the sampled ichthyofauna is autochthonous, and the majority of the species belongs to the orders Characiformes and Siluriformes. The order Characiformes comprised most of the specimens caught, Astyanax altiparanae being the most abundant species. All the studied environments were characterized by the massive occurrence of accidental species and low similarity between their ichthyofauna. In general, a greater number of species and higher values of the diversity index were observed downstream of the dam. The fish diversity in the studied habitats was positively correlated with the water body depth, and negatively correlated with the water conductivity. This last correlation may be an indicative of the negative influence of the pollution of the Jacaré-Guaçu basin on the local fish fauna.

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Checklist of the ichthyofauna of the Rio Negro basin in the Brazilian Amazon

ZooKeys ◽

10.3897/zookeys.881.32055 ◽

2019 ◽

Vol 881 ◽

pp. 53-89 ◽

Cited By ~ 5

Author(s):

Hélio Beltrão ◽

Jansen Zuanon ◽

Efrem Ferreira

Keyword(s):

Drainage System ◽

Fish Fauna ◽

High Rate ◽

Sampling Effort ◽

Additional Tool ◽

Rio Negro ◽

Small Streams ◽

Fish Collection ◽

Rio Negro Basin ◽

Occurrence Records

This study presents an extensive review of published and unpublished occurrence records of fish species in the Rio Negro drainage system within the Brazilian territory. The data was gathered from two main sources: 1) litterature compilations of species occurrence records, including original descriptions and revisionary studies; and 2) specimens verification at the INPA fish collection. The results reveal a rich and diversified ichthyofauna, with 1,165 species distributed in 17 orders (+ two incertae sedis), 56 families, and 389 genera. A large portion of the fish fauna (54.3% of the species) is composed of small-sized fishes < 10 cm in standard length. The main groups are Characiformes (454 species; 39.0%), Siluriformes (416; 35.7%), Gymnotiformes (105; 9.0%), and Cichliformes (102; 8.8%). The species composition differs between the main aquatic environments, such as: main channel (159 species), lakes (296), tributary rivers (596), small streams (234), seasonal beaches (186), and rapids (41). Part of the ichthyofauna is shared with adjacent basins, such as the Orinoco, rivers of the Guiana Shield, lower Solimões/Amazonas and upper Amazonas, which contributes to the remarkable ichthyofaunal diversity of the basin. A high rate of species endemism was observed in Characidae (24), Loricariidae (18), Cichlidae (18) and Callichthyidae (18), totalling 156 species (13.4%) endemic to the basin. An estimation of the species richness for the Rio Negro basin, considering 23 published references, resulted in 1,466 and 1,759 species (Jackknife 1 and 2, respectively), which seems reasonable when considering the large number of morphotypes left out of the present list and the low sampling effort in many areas of the basin. The results presented herein provide an additional tool for environmental managers and decision makers for conservation purposes of one of the richest and most well-preserved sub-basins of the Rio Amazonas system.

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Temporal patterns of fish occurrence of the euryhaline sector of a subtropical estuary, southern Brazil

Acta Scientiarum Biological Sciences ◽

10.4025/actascibiolsci.v42i1.48871 ◽

2020 ◽

Vol 42 ◽

pp. e48871

Author(s):

Paula Nakayama ◽

Alberto Carvalho Peret ◽

Olímpio Rafael Cardoso ◽

Marcelo Renato Lamour ◽

Henry Louis Spach

Keyword(s):

Cluster Analysis ◽

Inorganic Nitrogen ◽

Sampling Site ◽

Fish Fauna ◽

Principal Component ◽

Abundant Species ◽

Important Variable ◽

Factorial Correspondence Analysis ◽

Subtropical Estuary ◽

Fauna Composition

Fish fauna was studied in five sites of the shallow infralittoral of the Paranaguá Bay during the period from October 1999 to September 2000. At each sampling site, fish were sampled with other trawls, salinity and temperature were measured, water samples were taken from the bottom of the water column for determination of dissolved oxygen, dissolved inorganic nitrogen and phosphate. The spatial and temporal behavior of the environmental variables was analyzed by a Principal Component Analysis; Cluster Analysis was used to gather the sampling sites, and Factorial Correspondence Analysis was applied to the most abundant species. Temperature was the most important variable for the distribution of the months, allowing the division of the study period into hot and cold months. The temporal variation in the fish fauna composition was indicated by cluster analysis, with highest percentages of dissimilarity between the sampling sites during hot months. The variation in dissimilarity between the sites occurred due to differences in the number of individuals and species of the catches. The high frequencies of occurrence of Anisotremus surinamensis, Etropus crossotus, Genidens genidens, Micropogonias furnieri and Sphoeroides greeleyi were related to high temperatures. The greatest number of fish and species observed in hot months may be related to the life cycle of many species, which reproduce in warmer months, and whose offspring use estuaries as breeding areas.

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Checklist of lizards of the Juruti, state of Pará, Brazil

Check List ◽

10.15560/9.1.42 ◽

2013 ◽

Vol 9 (1) ◽

pp. 42 ◽

Cited By ~ 5

Author(s):

Ana Lúcia Costa Prudente ◽

Fernanda Magalhães ◽

Alessandro Menks ◽

João Fabrício De Melo Sarmento

Keyword(s):

Sampling Methods ◽

Abundant Species ◽

The Other ◽

Sampling Effort ◽

Pitfall Traps ◽

Lizard Species ◽

Species List ◽

The Road ◽

On The Road

We present the first lizard species list for the municipality of Juruti, state of Pará, Brazil. The list was drawn up as a result of data obtained from specimens deposited in the Herpetological Collection of the Museu Paraense Emílio Goeldi and from inventories conducted in 2008-2011. Sampling methods included pitfall traps with drift fences and time constrained searches. We considered the data collected by other researchers, incidental encounters and records of dead individuals on the road. We recorded 33 species, 26 genera and ten families. Norops tandai was the most abundant species. Compared with the other regions of Amazonia, the region of Juruti presented a large number of lizards. However, further studies with an increase in the sampling effort, could prove this area to be richer in lizards than that observed so far.

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Crayfish arts: an evaluation into the efficacy of artificial refuge traps for monitoring lotic white-clawed crayfish Austropotamobius pallipes (Lereboullet, 1858) (Decapoda, Astacidae) populations

Crustaceana ◽

10.1163/15685403-00003772 ◽

2018 ◽

Vol 91 (3) ◽

pp. 297-309 ◽

Cited By ~ 1

Author(s):

James O’Connor ◽

Sakinah Brennan ◽

Jan-Robert Baars

Keyword(s):

Population Studies ◽

Sampling Effort ◽

Irish Population ◽

Effective Technique ◽

Austropotamobius Pallipes ◽

Population Structures ◽

Capture Method ◽

Crayfish Population ◽

Capture Techniques ◽

Crayfish Species

White-clawed crayfishAustropotamobius pallipes(Lereboullet, 1858) are one of five crayfish species indigenous to Europe, and the only crayfish species to occur in Ireland. With no known invasive species posing a risk, the Irish population is of considerable conservation importance, particularly in a European context. While there are a number of capture techniques described for crayfish population studies, many have a number of limitations associated with them. There is a need therefore to evaluate new and emerging techniques, so as to assess their efficacy for monitoringA. pallipespopulations. Artificial refuge traps (ARTs), an alternative passive capture method, were evaluated against three other widely used capture techniques during the summer months of 2015. Results indicate ARTs to be an effective technique for sampling crayfish, and suggest that, in combination with other capture methods, ARTs could depict accurate population structures, and reduce some of the sampling effort and bias associated with crayfish monitoring.

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Distribution of Atta (Hymenoptera - Formicidae) in "terra-firme" rain forest of Central Amazonia: density, species composition and preliminary results on effects of forest fragmentation

Acta Amazonica ◽

10.1590/1809-43921988183315 ◽

1988 ◽

Vol 18 (3-4) ◽

pp. 309-315 ◽

Cited By ~ 14

Author(s):

Heraldo Luís de Vasconcelos

Keyword(s):

Species Composition ◽

Rain Forest ◽

Abundant Species ◽

Forest Fragments ◽

Forest Fragment ◽

Terra Firme ◽

Atta Sexdens ◽

Conservation Areas ◽

Continuous Forest ◽

Leaf Cutting

One hundred and fourteen hectares of a "terra-fiirme" rain forest 70 km north of Manaus, Amazonas, Brazil, were surveyed for leaf-cutting ant colonies (Atta spp). One half of this area was in isolated forest fragments (surrounded by pastures or second growth) of two sizes: 1 and 10 ha. The other half was in non-isolated fragments (connected to a large parch of forest) of the same sizes. Only two species occured in this forest: Atta sexdens sexdens L. and A. cepfhalotes L. The first was the most abundant species with a mean density of 0.35 colonies per ha. The mean density of A. cephalotes colonies was 0.03 per ha. The density of colonies was not significantly different between the isolated fragments and the continuous forest. Furthermore, the species composition did not change with isolation. However, pre-isolation data and long term monitoring are necessary to conclude that the isolation of a forest fragment has no effect upon Atta colonies. The non-uniform spatial distribution of Atta colonics within the "terra-firme" forest must be taken into account when selecting conservation areas in the Amazon, in order to preserve this important group of ants together with their native habitat.

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Environmental factors and benthic Oligochaeta (Annelida, Clitellata) assemblages in a stretch of the Upper São Francisco River (Minas Gerais State, Brazil)

Brazilian Journal of Biology ◽

10.1590/s1519-69842011000300013 ◽

2011 ◽

Vol 71 (2) ◽

pp. 437-446 ◽

Cited By ~ 7

Author(s):

AL Suriani-Affonso ◽

RS França ◽

M. Marchese ◽

O. Rocha

Keyword(s):

Size Composition ◽

Abundant Species ◽

Nitrogen And Phosphorus ◽

Sao Francisco River ◽

Limnodrilus Hoffmeisteri ◽

São Francisco River ◽

Data Variability ◽

Numerical Abundance ◽

Minas Gerais State ◽

Dry Seasons

The Oligochaeta forms an important part of the macroinvertebrates inhabiting sediments of lotic ecosystems. It has an important role in the cycling of matter and energy transfer in these environments. The aim of this study is to analyse limnological variables, their influence on the structure and diversity of benthic oligochaete taxocenosis in a stretch of the Upper São Francisco River and its tributary the Piumhi River. Samples were taken in two climatic periods, the dry season in October 2006 and 2007 and the rainy season in March 2007 and 2008 at three points along the Piumhi River and six points along the São Francisco River. The sediment of the São Francisco consisted predominantly of sand and clay, whereas the sediment of the Piumhi was mainly sandy. Six species of oligochaete occurred in the Piumhi River while seven were found in the São Francisco. Of these, Pristina synclites Stephenson, 1925, Pristina americana Cernosvitov, 1937, Bothrioneurum sp. Stolc, 1888 and Limnodrilus hoffmeisteri Claparede, 1862 occurred in the sediment of both rivers. L. hoffmeisteri showed the highest numerical abundance in the Piumhi River and Brinkhurstia americana (Brinkhurst, 1964) and L. neotropicus Cernosvitov, 1939 were the most abundant species in the São Francisco River. The highest oligochaete density was recorded in the Piumhi during the dry seasons. Canonical correspondence analyses (CCA) of sediment characteristics explained most of the data variability and the association of the presence of oligochaete species in the Piumhi and São Francisco Rivers with the limnological variables (grain size composition and total nitrogen and phosphorus concentrations in the sediment).

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