scholarly journals Near Threatened Fishes of the World: Malapterurus teugelsi Norris, 2002 (Siluriformes: Malapteruridae)

2018 ◽  
Vol 6 (2) ◽  
pp. 1
Author(s):  
Felix Koffi KONAN ◽  
Charles Koffi BOUSSOU ◽  
Yves Kotchi BONY ◽  
Mexmin Koffi KONAN ◽  
Edia Oi EDIA ◽  
...  
Keyword(s):  
River Basin ◽  
Reproductive Biology ◽  
Local Population ◽  
Cultural Representation ◽  
Distribution Area ◽  
Mining Activities ◽  
Fishing Pressure ◽  
The World ◽  
Threatened Fishes ◽  
Near Threatened

Malapterurus teugelsi Norris, 2002, an endemic electric catfishes of the Kogon River Basin in Guinea, is assessed as Near Threatened due to its restricted distribution area, fishing pressure, mining activities, loss of habitats and aquatic pollution. This fish has a high cultural representation in the folklore of the local population. Moreover, in addition to its very limited distribution, very little information exists on its reproductive biology and its food ecology. Therefore, singular care must be paid to it for its conservation.

scholarly journals Micralestes eburneensis Daget 1965 (Characiformes: Alestidae), a Near Threatened Fishes of the World

2018 ◽  
Vol 7 (1) ◽  
pp. 23
Author(s):  
Richard Jean Olive Doffou ◽  
Felix Koffi Konan ◽  
Gustave N’Guessan Aliko ◽  
Charles Koffi Boussou ◽  
Yves Kotchi Bony ◽  
...  
Keyword(s):  
Ivory Coast ◽  
Gold Mining ◽  
Anthropogenic Pressure ◽  
Mining Activities ◽  
Restricted Range ◽  
Fishing Pressure ◽  
Management Actions ◽  
The World ◽  
Threatened Fishes ◽  
Near Threatened

Micralestes eburneensis Daget 1965, an endemic characin fish of Ivory Coast / Liberia is assessed as Near Threatened due to its restricted range. In addition, there is strong fishing pressure, habitat loss and aquatic pollution from clandestine gold mining in the Cavally River bed.Moreover, given the development and intensification of mining activities in the study area, it is to be expected that the population of the endemic species will continue to decline. The strong anthropogenic pressure in this region on the Cavally hydrosystem and its environment must be taken into account for a future update of M. eburneensis conservation status.There is an immediate need for developing protection and management actions for this fish species.

scholarly journals Threatened fishes of the world: Coptodon walteri (Thys van den Audenaerde 1968) (Perciformes: Cichlidae)

2016 ◽  
Vol 74 (2) ◽  
pp. 84-86
Author(s):  
Felix Koffi Konan ◽  
Richard Jean Olive Doffou ◽  
Yves Kotchi Bony ◽  
Gustave N’guessan Aliko ◽  
Emmanuel N’guessan Assemian
Keyword(s):  
Ivory Coast ◽  
Gold Mining ◽  
Aquatic Pollution ◽  
Fishing Pressure ◽  
The World ◽  
Management Plans ◽  
Threatened Fishes ◽  
Conservation And Management ◽  
Near Threatened

Abstract Coptodon walteri Thys van den Audenaerde 1968, an endemic cichlid of Ivory Coast and Liberia, is assessed as Near Threatened due to fishing pressure and loss of habitats, and aquatic pollution as a result of extensive clandestine gold mining in the bed of the Cavally River. There is an immediate need for developing conservation and management plans for this species.

Stranding cases of endangered Ganges river dolphins in the Ghaghara–Sharada irrigation canals, Ganges river basin, India: conservation implications

Mammalia ◽  
2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Shakti Prajapati
Keyword(s):  
River Basin ◽  
Local Population ◽  
Uttar Pradesh ◽  
Ganges River ◽  
Population Declines ◽  
Irrigation Canals ◽  
Indus River ◽  
River Dolphin ◽  
Conservation Implications ◽  
Media Reports

AbstractPopulations of endangered Ganges and Indus river dolphins have been under severe threat from diversion of river water by dams, barrages, and canal networks across the Indus and Ganges–Brahmaputra river basins. River dolphins prefer deep water and might enter irrigation canals in the dry-season, getting stranded there. Stranding can cause mortality and local population declines, and poses an emerging challenge to river dolphin conservation efforts. In Pakistan’s Indus river basin, stranding rates of Indus dolphins in irrigation canals are high, and well-coordinated rescue-release operations are undertaken. Despite commendable river dolphin rescue efforts in some parts of India, stranding cases are not always reported. From open-access media reports (2007–08 to 2017–18), I found 26 stranding cases of Ganges river dolphins from the Ghaghara–Sharada canal network across seven districts of Uttar Pradesh, India. Of these, 62% reports were from 2015 to 2016. Most cases occurred in secondary and tertiary canal branches. Interviews with fishers, farmers, and government officials revealed low awareness of stranding cases. Stranded dolphins might have no chance of returning to their source habitat, unless rescued. From my results, I discuss how current barrage-canal operations could influence dolphin stranding risk, and their implications for flow management in the Ghaghara–Sharada river basin.

scholarly journals Patterns of variation in the rDNA cistron within and among world populations of a mosquito, Aedes albopictus (Skuse).

Genetics ◽  
1989 ◽  
Vol 121 (3) ◽  
pp. 539-550
Author(s):  
W C Black ◽  
D K McLain ◽  
K S Rai
Keyword(s):  
Aedes Albopictus ◽  
Local Population ◽  
Population Level ◽  
Restriction Map ◽  
Repeat Region ◽  
Molecular Drive ◽  
Nontranscribed Spacer ◽  
Coding Regions ◽  
The World ◽  
Ribosomal Cistron

Abstract A restriction map was constructed of the ribosomal cistron in a mosquito, Aedes albopictus (Skuse). The 18s, 28s and nontranscribed spacer (NTS) regions were subcloned and used to probe for intraspecific variation. Seventeen populations were examined throughout the world range of the species. No variation was detected in the coding regions but extensive and continuous variation existed in the NTS. The NTS consisted of two nonhomologous regions. The first region contained multiple 190-bp AluI repeats nested within larger XhoI repeats of various sizes. There was a large number of length variants in the AluI repeat region of the NTS. No repeats were found in the second region and it gave rise to relatively fewer variants. An analysis of NTS diversity in individual mosquitoes indicated that most of the diversity arose at the population level. Discriminant analysis was performed on spacer types in individual mosquitoes and demonstrated that individuals within a population carried a unique set of spacers. In contrast with studies of the NTS in Drosophila populations, there seems to be little conservation of spacers in a population. The importance of molecular drive relative to drift and selection in the generation of local population differentiation is discussed.

Threatened fishes of the world: Hemisalanx prognathus (Regan 1908) (Salangidae)

2006 ◽  
Vol 78 (3) ◽  
pp. 209-210 ◽  
Author(s):  
Jie Zhang ◽  
Fuwen Wei ◽  
Ming Li ◽  
Muqi Xu
Keyword(s):  
The World ◽  
Threatened Fishes

Threatened fishes of the world: Anabarilius grahami Regan, 1908 (Cyprinidae)

2009 ◽  
Vol 86 (3) ◽  
pp. 399-400 ◽  
Author(s):  
Shu-Wei Liu ◽  
Xiao-Yong Chen ◽  
Jun-Xing Yang
Keyword(s):  
The World ◽  
Threatened Fishes

Fish fauna in low-order streams of the Piquiri River, Upper Paraná River basin, Brazil

2021 ◽  
Vol 21 (4) ◽  
Author(s):  
Mariele P. Camargo ◽  
Sandra C. Forneck ◽  
Fabrício M. Dutra ◽  
Leonardo B. Ribas ◽  
Almir M. Cunico
Keyword(s):  
South America ◽  
River Basin ◽  
Native Species ◽  
Fish Fauna ◽  
Neotropical Streams ◽  
The World ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Electric Fishing ◽  
Low Order

Abstract The South America ichthyofauna encompasses the highest diversity of the world, however is highly threatened by anthropogenic actions. The fish fauna of nine low-order streams, tributaries of the Piquiri River and impacted by aquaculture, agriculture and urbanization were sampled in the present study. Samplings were done quarterly from December 2017 to September 2018 at three sites in each stream, using a portable electric fishing device in 50-meter segments. A total of 14,507 individuals were collected, belonging to six orders, 20 families, 46 genera, and 70 species. The highest richness and abundance were found for the orders Characiformes and Siluriformes. In this study, nine species that had not been recorded were found, totaling 163 for the basin. In addition, 14 non-native species were captured. The presented list of species contributes to the existing database of ichthyofauna distribution in Neotropical streams, denoting that it is underestimated in the region, mainly in low-order tributaries. The present study reinforces the importance of inventories and monitoring in environments with high biodiversity and sensitive to anthropogenic actions.

scholarly journals Values and Preferences for Domestic Water Use: A Study from the Transboundary River Basin of Mékrou (West Africa)

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1232
Author(s):  
Vasileios Markantonis ◽  
Celine Dondeynaz ◽  
Dionysis Latinopoulos ◽  
Kostas Bithas ◽  
Ioannis Trichakis ◽  
...  
Keyword(s):  
West Africa ◽  
Willingness To Pay ◽  
River Basin ◽  
Citizen Participation ◽  
Human Life ◽  
Local Population ◽  
Western World ◽  
African Countries ◽  
Domestic Water ◽  
Water Provision

Water is indispensable for human life and sufficient domestic use is considered as a regularity in the western world. The conditions are substantially different in African countries where poverty and lack of life-supporting services prevail. The provision of domestic water is an essential problem, which requires action. The lack of sufficient funding for the development of infrastructure supports claims for citizen participation in related costs. However, can citizens pay and to what extend for sufficient water provision? The present study investigates a household’s willingness to pay for domestic water in the transboundary Mékrou River Basin in West Africa (Burkina Faso, Benin and Niger) and explores the payment for domestic water provision to poverty. The paper uses the results of a household survey that was undertaken in the Mekrou basin including a representative sample from all three countries. Based on this survey the paper presents basic socio-economic characteristics of the local population as well as qualitative water provision and management attributes. In the core of the econometric analysis the paper presents the results of the survey’s Contingent Valuation (CV) scenario estimating the households’ willingness to pay (WTP) for a domestic water provision. The households of the Mekrou basin are willing to pay 2.81 euro per month in average for a domestic water provision network but this is strongly related with the wealth of households. This finding although it may support the “user pays principle”, it also raises serious questions over the provision of water to poor households.

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