scholarly journals Annotated list of freshwater fishes of the Limoncocha Lagoon, Napo river basin, northern Amazon region of Ecuador

Check List ◽  
2018 ◽  
Vol 14 (1) ◽  
pp. 55-75 ◽  
Author(s):  
Jonathan Valdiviezo-Rivera ◽  
Carolina Carrillo-Moreno ◽  
Enrique Gea-Izquierdo
Keyword(s):  
River Basin ◽  
Freshwater Fishes ◽  
Amazon Region ◽  
Annotated List

A new species of Loricaria (Siluriformes: Loricariidae) from the Turiaçu River basin, Eastern Amazon region, Brazil

Zootaxa ◽  
2021 ◽  
Vol 4915 (3) ◽  
pp. 424-434
Author(s):  
ANANDA CAROLINA S. SARAIVA ◽  
JOÃO MARCELO S. ABREU ◽  
FELIPE POLIVANOV OTTONI ◽  
NIVALDO MAGALHÃES PIORSKI
Keyword(s):  
New Species ◽  
Freshwater Fish ◽  
River Basin ◽  
Standard Length ◽  
Freshwater Fishes ◽  
Amazon Region ◽  
Fish Diversity ◽  
Pectoral Girdle ◽  
Median Region ◽  
A New Species

A new species of Loricaria is herein described from the Turiaçu River basin, Eastern Amazon region, Maranhão state, Brazil, within the Maranhão Hydrological Unit (MHU). Loricaria turi differs from its congeners mainly by the following combination of characters: abdominal plate development confined to the posterior median region, pectoral girdle mostly naked, with cluster of plates near pectoral fin bases; large eyes (minimum orbital diameter 16.2–20.7% of HL and maximum orbital diameter 19.8–24.0% of HL), 214.4 mm of maximum standard length, and large basicaudal plate (16.6–29.2% of HL). The description of this new species strengthens the hypothesis that the Maranhão Hydrological Unit (MHU) is a possible area of endemism for freshwater fishes and contributes to the knowledge of the freshwater fish diversity and composition of the region. 

scholarly journals Anthropic transformation in the Gurupi river basin, eastern Amazon

2019 ◽  
Vol 10 (3) ◽  
pp. 212-235
Author(s):  
Fabiana da Silva Pereira ◽  
Ima Célia Guimarães Vieira
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Land Cover Change ◽  
River Basin ◽  
Forest Cover ◽  
Temporal Changes ◽  
Amazon Region ◽  
Digital Data ◽  
Forest Protection ◽  
Spatial And Temporal Changes

The objective of this paper was to evaluate the degree of anthropic transformation of a river basin in the Amazon region. We used the digital data of the TerraClass Project to calculate the Anthropic Transformation Index - ATI. In order to verify spatial and temporal changes along a decade in the Gurupi river basin, we used the database of the years 2004 and 2014. The results showed an increase of anthropic changes in the basin over a decade, as a result of forest cover conversion into agricultural and pastures areas. Although the Gurupi river basin remains at a regular level of degradation after a decade, the intensification of land use and land cover change is a threat to the few rainforest remnants of the river basin, which can lead the region to the next level of degradation, if effective forest protection, conservation and restoration actions are not implemented in the region.  

scholarly journals Additional records of non-native freshwater fishes for the Ebro River basin (Spain)

2010 ◽  
Vol 5 (3) ◽  
pp. 291-296 ◽  
Author(s):  
Rafael Miranda ◽  
Pedro Leunda ◽  
Javier Oscoz ◽  
Antonio Vilches ◽  
Ibon Tobes ◽  
...  
Keyword(s):  
River Basin ◽  
Freshwater Fishes ◽  
Ebro River

Considerations for the Propagation and Conservation of Endangered Lake Suckers of the Western United States

2017 ◽  
Vol 8 (1) ◽  
pp. 301-312 ◽  
Author(s):  
Julie L. Day ◽  
Jennifer L. Jacobs ◽  
Josh Rasmussen
Keyword(s):  
United States ◽  
River Basin ◽  
Freshwater Fishes ◽  
Western United States ◽  
Numerous Species ◽  
Klamath River ◽  
Western Lake ◽  
Prevention Measure ◽  
Klamath River Basin ◽  
Anthropogenic Threats

Abstract Decades of persistent natural and anthropogenic threats coupled with competing water needs have compromised numerous species of freshwater fishes, many of which are now artificially propagated in hatcheries. Low survival upon release is common, particularly in systems with substantial nonnative predator populations. Extensive sampling for Shortnose (Chasmistes brevirostris) and Lost River Suckers (Deltistes luxatus) in the Klamath River Basin on the California–Oregon border have failed to detect any new adult recruitment for at least two decades, prompting an investigation into artificial propagation as an extinction prevention measure. A comprehensive assessment of strategies and successes associated with propagation for conservation restocking has not been performed for any Catostomid. Here, we review available literature for all western lake sucker species to inform propagation and recovery efforts for Klamath suckers and summarize the relevance of these considerations to other endangered fishes.

scholarly journals Materials on the fauna of bivalve mollusks (Mollusca, Bivalvia) of the Taz river basin (Western Siberia)

2020 ◽  
Vol 30 (1) ◽  
pp. 13-32
Author(s):  
E. S. Babushkin
Keyword(s):  
Species Richness ◽  
River Basin ◽  
Western Siberia ◽  
Point Of View ◽  
River Channels ◽  
The Core ◽  
Annotated List ◽  
Temporary Habitats ◽  
Taxonomic Point ◽  
First Time

Based on a study of samples made by the author, 70 species of freshwater bivalves belonging to 6 genera and 2 families are recorded for the Taz River basin (north of Western Siberia). An annotated list of bivalves of the Taz basin is provided, with data on species’ range, their findings in Western Siberia and within the studied area. Some information about bionomics and abundance of bivalves are given. 45 species are for the first time registered in this basin. Most studied molluscan communities are characterized by low species richness; the distribution of species by their occurrence was extremely uneven. 22 species are characterized as rare. The highest species richness of bivalves was found in river channels, rivers and brooks; the lowest - in temporary habitats. The core of the fauna is constituted by species with broadest range (cosmopolitan, trans Holarctic, trans Palearctic) as well as by taxa with European Siberian type of distribution. From the taxonomic point of view, the bivalve fauna of the Taz basin is relatively separated from the faunas of other river basins of Western Siberia and is more similar to the fauna of the Lower Yenisean zoogeographic province (sensu Starobogatov [1986]).

Fire and Power on the River Basin: Irregular Warfare and Socio-Environmental Consequences of the Guerrilla in Araguaia, Brazil

2021 ◽  
Vol 14 (1) ◽  
pp. 58-85
Author(s):  
Claudio De Majo
Keyword(s):  
Small Group ◽  
River Basin ◽  
Communist Party ◽  
Local Population ◽  
Amazon Region ◽  
Irregular Warfare ◽  
Military Dictatorship ◽  
Environmental Consequences ◽  
The Military ◽  
Geographical Characteristics

The aim of this article is to retrace a guerrilla episode that occurred in the Amazon region of Araguaia during the military dictatorship in Brazil (1972?1975), opposing a group of militants from the Communist Party of Brazil (PCdoB) and the National Brazilian Army. Taking advantage of the geographical characteristics of the region, a small group of guerrilla fighters was able to confront a large military contingent for almost three years. As this article demonstrates, appealing to the powerful symbolic potential of the Amazon jungle, the guerrilla created a solid environmental narrative of force and shrewdness supported by the local population. However, as military forces began to better explore the region and to resort to irregular warfare strategies, they managed to curb the guerrilla, exterminating almost every member involved in the fight. Finally, this article looks at the marked socio-environmental scars that the conflict left in the region, and how these influenced social, political and ecological equilibriums during the following decades.

Community and infracommunities of metazoan parasites in Hemiodus unimaculatus (Hemiodontidae) from Jari River basin, a tributary of Amazon River (Brazil)

2021 ◽  
Vol 30 (4) ◽  
Author(s):  
Odonei Moia Almeida ◽  
Marcos Sidney Brito Oliveira ◽  
Marcos Tavares-Dias
Keyword(s):  
Species Richness ◽  
River Basin ◽  
Parasite Community ◽  
Amazon Region ◽  
Amazon River ◽  
Metazoan Parasites ◽  
Random Dispersion ◽  
Northern Brazil ◽  
Species Richness And Abundance ◽  
Over Time

Abstract Parasites are an important part of biodiversity, and knowledge of species and their relationship with their hosts helps in monitoring an ecosystem over time. The aim of this study was to investigate the fauna of metazoan parasites in Hemiodus unimaculatus from the Jari River, in the eastern Amazon region, northern Brazil. Of the fish examined, 96.7% were parasitized by one or more species, and a total of 336 parasites such as Dactylogyridae gen. sp.1, Dactylogyridae gen. sp.2, Dactylogyridae gen. sp.3, Dactylogyridae gen. sp.4, Gyrodactilydae gen. sp., Urocleidoides sp.1, Urocleidoides sp.2, Urocleidoides sp.3, metacercariae of Digenea gen. sp., Procamallanus (Spirocamallanus) inopinatus, Contracaecum sp., Neoechinorhynchus sp. and Acarina gen. sp. The parasite community showed low Brillouin diversity (0.58 ± 0.29), low evenness (0.44 ± 0.21) and low species richness (7.40 ± 3.83). There was a predominance of ectoparasites, mainly monogeneans and digeneans. The parasites showed an aggregate dispersion, except for P. (S.) inopinatus, which had a random dispersion. The size of the hosts had no effect on diversity, species richness and abundance of parasites, but other factors structured the parasite community. This is the first study on the parasite community and infracommunities in H. unimaculatus.

Survey of the endohelminth parasites of freshwater fishes in the upper Mezquital River Basin, Durango State, Mexico

Zootaxa ◽  
2009 ◽  
Vol 2164 (1) ◽  
pp. 1-20 ◽  
Author(s):  
G. PÉREZ-PONCE DE LEÓN ◽  
R. ROSAS-VALDEZ ◽  
B. MENDOZA-GARFIAS ◽  
R. AGUILAR-AGUILAR ◽  
J. FALCÓN-ORDAZ ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Fauna ◽  
Freshwater Fishes ◽  
Point Of View ◽  
Helminth Parasites ◽  
Northern Mexico ◽  
Transitional Area ◽  
Freshwater Fish Fauna ◽  
New Hosts ◽  
Host Parasite

As a part of an ongoing inventory of the helminth parasites of freshwater fishes in Mexico, 676 specimens were collected between November 2007 and December 2008 in 23 localities along the upper Mezquital River Basin in Durango State, northern Mexico. Sixteen species of hosts, mostly corresponding to Nearctic freshwater elements, were studied. A total of 1,230 individual worms were collected during this survey, representing 25 species of endohelminths of which 9 were digeneans, 3 were cestodes, 4 were acanthocephalans, and 9 were nematodes. The checklist contains 24 new hosts and 42 new locality records. The information provided in this checklist may be helpful for our understanding of the biodiversity and historical biogeography of this host-parasite system, since the Mezquital River Basin mostly contains a Nearctic freshwater fish fauna, with a few Neotropical and endemic elements and may represent a transitional area from a biogeographical point of view.

<i>Identification of hydrologically homogeneous regions in the Solimões river basin in the Amazon region</i>

2018 ◽  
Author(s):  
Clívia Dias Coelho ◽  
Demetrius David da Silva ◽  
Naziano Pantoja Filizola ◽  
Silvio Bueno Pereira ◽  
Michel Castro Moreira
Keyword(s):  
River Basin ◽  
Amazon Region ◽  
Homogeneous Regions ◽  
Solimões River
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