scholarly journals Freshwater fish diversity and its conservation status in different water bodies of Nepal

2020 ◽  
Vol 8 ◽  
pp. 39-52
Author(s):  
Kumar Khatri ◽  
Bibhuti Ranjan Jha ◽  
Smriti Gurung ◽  
Udhab Raj Khadka
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Conservation Status ◽  
Fish Fauna ◽  
Iucn Red List ◽  
Current Status ◽  
Fish Diversity ◽  
Exotic Fish ◽  
Spatio Temporal ◽  
Taxonomic Studies

This review describes the current status of freshwater fish diversity, their IUCN categories and threats to fish fauna in Nepal. The freshwater systems of the country are known to harbor over 220 fish species, thereby indicating a rich ichthyofaunal diversity. However, this number varies from author to author. Cyprinidae is the most common and dominant taxon. A total of 15 endemic and 15 exotic fish species have been reported. A total of 34 fish species have been listed under the IUCN Red List threatened categories. Major threats to fish include damming and pollution. Fish diversity studies have mainly focused on inventories only. Studies focusing on river longitudinal aspects, the inclusion of spatio-temporal aspects, and rigorous taxonomic studies combined with genetic studies are crucial to develop strategic conservation measures of fish fauna in Nepal.

scholarly journals Diversity, potentiality, and conservation status of fish fauna in the upper Mahakam’s tributaries, East Kalimantan

2019 ◽  
Vol 19 (3) ◽  
pp. 391
Author(s):  
Jusmaldi Jusmaldi ◽  
Nova Hariani ◽  
Norbeta Doq
Keyword(s):  
Fish Species ◽  
Diversity Index ◽  
Conservation Status ◽  
Fish Fauna ◽  
Iucn Red List ◽  
Fish Diversity ◽  
East Kalimantan ◽  
Wiener Diversity Index ◽  
Data Deficient ◽  
Almost All

Diversity, potentiality and conservation status of fish fauna in upper Mahakam’s tributaries of east Kalimantan is unknown. The purposes of this study were to analysis species diversity, determine potentiality and conservation status of fish fauna in upper Mahakam’s tributaries, east Kalimantan. Fish sampling with purposive method was conducted in four tributaries, i.e Tepai River, Pahangai River, Danum Parai River, and Meraseh River for one month. Fishes were collected by several gears type. The results of this research showed that the total number of fish caught was 820 individuals; consist of 26 species, 7 families, and 4 orders. The Cyprinidae was the most dominant family found in all tributaries. The Shannon-Wiener diversity index in four tributaries were varied and ranging from 1.749-2.087. The highest fish diversity was recorded at Maraseh River followed by Pahangai River, Danum Parai River, and Tepai River. The low fish diversity was discovered at Tepai River may be due to differences in substrate type, water velocity, and water depth as compared to the Maraseh River, Pahangai River, Danum Parai River. The fish species similarity coefficient between four tributaries ranged from 0.606-0.842 and the highest dissimilarity was found between Tepai River and Danum Parai River. Almost all fishes categorized as edible fish for local consumption. Syncrossus hymenophysa and Gastromyzon lepidogaster have potential as ornamental fish. Regarding IUCN red list status, six fish species were grouped into least concern status, two species as data deficient, one species as near threatened, one species as endangered species and 16 other species were not on the list.

scholarly journals Effective reassessments of freshwater fish species: a case study in a Mediterranean peninsula

Hydrobiologia ◽  
2021 ◽  
Author(s):  
Imanol Miqueleiz ◽  
Rafael Miranda ◽  
Arturo H. Ariño ◽  
Tommaso Cancellario
Keyword(s):  
Iberian Peninsula ◽  
Freshwater Fish ◽  
Fish Species ◽  
Conservation Status ◽  
Fish Fauna ◽  
Iucn Red List ◽  
Molecular Techniques ◽  
Red Lists ◽  
Freshwater Fish Species ◽  
Freshwater Fish Fauna

AbstractIUCN Red List assessments for fish species can quickly become out of date. In recent years molecular techniques have added new ways of obtaining information about species distribution or populations. In this work, we propose the Iberian Peninsula as an example of reassessment needs in its endangered freshwater fish fauna. We compiled the list of freshwater fish species occurring in continental Spain and Portugal and examined their conservation status in global and national Red Lists. We retrieved records for these species in the Iberian Peninsula and calculated several biological indexes (richness and vulnerability indexes). Our results showed a patchy data coverage of fish records in the Iberian Peninsula. Threat levels reported within national Red Lists are higher than their global counterparts, reinforcing the necessity of improving and maintaining up to date national Red Lists. Iberian watersheds have moderate levels of threat and high levels of out of date assessments. The nearly fully completed genetic databases for Iberian fish species, along with the limited distribution of many endangered species and the necessity of update their assessments constitute an excellent opportunity to use data obtained from eDNA to improve species monitoring practices and their conservation status.

scholarly journals Water Quality and Conservation Status of Fish Fauna of Main Outfall Drain, Al-Diwaniya City, Iraq

2021 ◽  
Vol 910 (1) ◽  
pp. 012062
Author(s):  
Kadhim J.L. Al-Zaidy
Keyword(s):  
Water Quality ◽  
Freshwater Fish ◽  
Fish Species ◽  
Lower Risk ◽  
Fish Community ◽  
Conservation Status ◽  
Fish Fauna ◽  
Fish Diversity ◽  
Ecological Indices ◽  
The Third

Abstract Freshwater fish diversity, abundance, the ecological indices, and water quality from Main Outfall Drain (MOD) in Al-Diwaniya City/middle Iraq were studied monthly from January to December 2017 in two sites. The present study has shown that the third river (MOD) supported 15 fish species belonging to 7 families. As far as biodiversity status in fish community (IUCN-2019) is concerned, out of 15 species, eleven fish species are categorized into Lower risk least concern (LC or LR/lc), four Vulnerable (VU). Eight species were sensitive to salinity; seven species were tolerance. The results were concluded that the properties of water were tolerable for the fish community. Ultimately, it can be concluded that the sector of MOD supported the fish community. But it needs constant monitoring for the conserve and development of the diversity and the case of the healthy fish.

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

Water ◽  
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.

scholarly journals SPATIO-TEMPORAL VARIATION OF THE ICHTHYOFAUNA IN THE ESTUARY FROM MANAMO CHANNEL, ORINOCO RIVER DELTA, VENEZUELA

2019 ◽  
Vol 12 (45-48) ◽  
Author(s):  
Ángel Marval-Rodríguez ◽  
José Alió-Mingo ◽  
Yorlen Carvajal ◽  
Douglas Altuve ◽  
Germán Vizcaíno
Keyword(s):  
Temporal Variation ◽  
Fish Species ◽  
Rainy Season ◽  
Fish Fauna ◽  
Commercial Application ◽  
Fish Diversity ◽  
Dry Period ◽  
Structural Dynamic ◽  
Orinoco River ◽  
Spatio Temporal

<p>The delta of Orinoco River constitutes a long estuarine extension of a great importance to fisheries at Venezuela, because, it is an indispensable area for reproduction, feeding and growing of several fish species, most of them with a commercial application. The purpose of this research was to identify and analyze the changes in fish diversity and the structural dynamic of the community at four zones of channel Manamo, during dry and rainy season. Samples were taken on March and May for dry period and July and August for rainy season. A total of 48 species were identified, grouped into 24 families and 42 genera. The diversity was higher in Bajo del Medio during the dry season (2.58 bits/ind), decreasing to 1.66 bits/ind in el Pajar (rains). The PERMANOVAS analyzes showed statistical differences in the composition of species with respect to the climate season (psed-F = 0.0365, <em>p</em> &lt;0.05), but not between the sampling stations (psed-F 0.6668; <em>p</em> &lt; 0.05). The results indicated that the fish fauna of the region is composed of elements characteristic of an estuary, being the climate seasons the most important factors for the evaluated group and this reflects the seasonal nature of this community.</p>

scholarly journals On the freshwater fish fauna of Krishna River, Sangli District, Maharashtra, India

2021 ◽  
Vol 13 (8) ◽  
pp. 19093-19101
Author(s):  
Suresh M. Kumbar ◽  
Shrikant S. Jadhav ◽  
Swapnali B. Lad ◽  
Abhijit Ghadage ◽  
Satyawan S. Patil ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Threatened Species ◽  
Conservation Status ◽  
Fish Fauna ◽  
River System ◽  
Iucn Red List ◽  
Cauvery River ◽  
Freshwater Fish Fauna ◽  
Data Deficient ◽  
First Time

Freshwater fish fauna of Krishna River, Sangli district was studied from 2013 to 2017. A total of 73 species belonging to 10 orders, 22 families, and 49 genera were recorded, of which, 29 species are endemic to the Western Ghats and 11 species endemic to the Krishna River system. Labeo kontius, an endemic barb of the Cauvery River System was recorded for the first time from the Krishna River, Maharashtra. As per the IUCN Red List of Threatened Species, 54 species are assessed as ‘Least Concern’, four species as ‘Near Threatened’, three species as ‘Vulnerable’, five as ‘Endangered’, and two as ‘Data Deficient’. The conservation status of two species has not yet been assessed. Fish fauna of the Krishna River within the study area is threatened as a result of alien species, and several anthropogenic stressors such as pollution from industrial as well as agricultural sources, human settlements, and overfishing.  Since, this small study area harbours 28 endemic and eight threatened species, their conservation should be given high priority.

scholarly journals Exotic and invasive fishes in Mexico

Check List ◽  
2015 ◽  
Vol 11 (3) ◽  
pp. 1627 ◽  
Author(s):  
Hector Espinosa Perez ◽  
Montserrat Ramírez H.
Keyword(s):  
Fish Species ◽  
Fish Fauna ◽  
Aquatic Systems ◽  
Current Status ◽  
Electronic Database ◽  
Exotic Fish ◽  
High Importance ◽  
Invasive Fishes ◽  
The World ◽  
Exotic Fish Species

This paper presents a list of the exotic fish species introduced in Mexican aquatic systems. This list is the result of the systematized information contained in several databases of ichthyological collections around the world and different publications. A total of 104 species were found, distributed in 19 families and 51 genera. The most species-rich were Cyprinidae with 22 species, Poeciliidae (19 species), Cichlidae (15 species) and Centrarchidae (13 species). A map and an electronic database were created based on the knowledge of the species, showing the known introductions of exotic fishes in the country. The information was obtained from a database stored in the Colección Nacional de Peces IBUNAM, which can be accessed online. This study has a high importance for the knowledge of the exotic fish fauna of Mexico and its current status.

scholarly journals Differences in sensitivity of native and exotic fish species to changes in river temperature

2011 ◽  
Vol 57 (6) ◽  
pp. 852-862 ◽  
Author(s):  
R.S.E.W. Leuven ◽  
A.J. Hendriks ◽  
M.A.J. Huijbregts ◽  
H.J.R. Lenders ◽  
J. Matthews ◽  
...  
Keyword(s):  
Exotic Species ◽  
Fish Species ◽  
Native Species ◽  
Temporal Trends ◽  
Fish Fauna ◽  
Native Fish ◽  
Fish Diversity ◽  
Exotic Fish ◽  
River Temperature ◽  
Exotic Fish Species

Abstract This paper describes the effects that temperature changes in the Rhine river distributaries have on native and exotic fish diversity. Site-specific potentially affected fractions (PAFs) of the regional fish species pool were derived using species sensitivity distributions (SSDs) for water temperature. The number of fish species in the river distributaries has changed remarkably over the last century. The number of native rheophilous species declined up until 1980 due to anthropogenic disturbances such as commercial fishing, river regulation, migration barriers, habitat deterioration and water pollution. In spite of progress in river rehabilitation, the native rheophilous fish fauna has only partially recovered thus far. The total number of species has strongly increased due to the appearance of more exotic species. After the opening of the Rhine-Main-Danube waterway in 1992, many fish species originating from the Ponto-Caspian area colonized the Rhine basin. The yearly minimum and maximum river temperatures at Lobith have increased by circa 4 0C over the period 1908-2010. Exotic species show lower PAFs than native species at both ends of the temperature range. The interspecific variation in the temperature tolerance of exotic fish species was found to be large. Using temporal trends in river temperature allowed past predictions of PAFs to demonstrate that the increase in maximum river temperature negatively affected a higher percentage of native fish species than exotic species. Our results support the hypothesis that alterations of the river Rhine’s temperature regime caused by thermal pollution and global warming limit the full recovery of native fish fauna and facilitate the establishment of exotic species which thereby increases competition between native and exotic species. Thermal refuges are important for the survival of native fish species under extreme summer or winter temperature conditions.

scholarly journals Rapid expansion and biodiversity impacts of the red devil cichlid (Amphilophus labiatus, Günther 1864) in Lake Sentani, Papua, Indonesia

2018 ◽  
Vol 19 (6) ◽  
pp. 2096-2103 ◽  
Author(s):  
HENDERITE L. OHEE ◽  
PUGUH SUJARTA ◽  
SURIANI BR. SURBAKTI ◽  
HOLLY BARCLAY
Keyword(s):  
Fish Species ◽  
Fish Fauna ◽  
Wiener Index ◽  
Rapid Expansion ◽  
Native Fish ◽  
Fish Diversity ◽  
Exotic Fish ◽  
Dominant Fish ◽  
Total Fish ◽  
Trophic Niches

Ohee HL, Sujarta P, Br Surbakti S, Barclay H. 2018. Rapid expansion and biodiversity impacts of the red devil cichlid (Amphilophus labiatus, Günther 1864) in Lake Sentani, Papua, Indonesia. Biodiversitas 19: 2096-2103. The red devil cichlid (Amphilophus labiatus, Günther 1864) is one of ten exotic fish species inhabiting Lake Sentani. It is believed to be one of the most important threats to the native fish of Lake Sentani. This study aimed to document the distribution of red devil cichlids and the impacts of this species on native fish fauna. Fish were sampled in six locations in Lake Sentani using gill nets during February and March 2018. Fish species and abundance were recorded and used to calculate the relative abundance, dominance, species evenness, Shannon Wiener Index (H’) and the correlation between introduced and native fish species. A total of 836 fish belonging to 12 species were recorded across Lake Sentani. Mean fish diversity (H’=0.57) and evenness (E= 0.25) were low. The red devil cichlid is the most abundant fish recorded during our surveys (87.2% of total fish collected) and is now the most dominant fish in the lake (C=0.76). Moreover, it has colonized all areas sampled within the lake because of its ability to colonize new habitat and to successfully exploit a large diversity of trophic niches. However, Amphilophus labiatus was not found to be significantly correlated to native fish between different sites in Lake Sentani. The existence of endemic and native fish in Lake Sentani is now seriously threatened by the presence of the red devil cichlid throughout this lake.

scholarly journals Present and past status of fish fauna of river Basantar, an important tributary of the river Ravi, in Samba district, Jammu (J&K)

2012 ◽  
Vol 4 (1) ◽  
pp. 123-126 ◽  
Author(s):  
Arti Sharma ◽  
S. P. S. Dutta
Keyword(s):  
Environmental Factors ◽  
Fish Species ◽  
Fish Fauna ◽  
Fish Diversity ◽  
Anthropogenic Pressure

Icthyofaunal study of river Basantar, an important tributary of river Ravi in Samba district, Jammu (J&K) has revealed the existence of 35 fish species belonging to 5 orders, 10 families and 25 genera. There is dominance of Cypriniformes (18 spp.) followed by Siluriformes (10 spp.), Perciformes (4 spp.), Synbrachiformes (2 spp.) and Osteoglossiformes (1 sps.). Present record of 35 fish species when compared with the earlier report of 59 fish species reveals a decline in fish diversity and is caused by environmental factors and anthropogenic pressure.

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