scholarly journals Small-sized fish: the largest and most threatened portion of the megadiverse neotropical freshwater fish fauna

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Ricardo M. C. Castro ◽  
Carla N. M. Polaz
Keyword(s):  
Freshwater Fish ◽  
Threatened Species ◽  
Human Impacts ◽  
Fish Fauna ◽  
Neotropical Region ◽  
Conservation Strategies ◽  
Small Fish ◽  
Large Fish ◽  
Freshwater Fish Fauna ◽  
General Synthesis

Abstract: We introduce the work providing a synthetic description of the diversity and phyletic structure of freshwater fish in the Neotropical Region, especially emphasizing that of Brazil. This is accompanied by a discussion about environments of fish from small to medium sized to large, taking into account how it shaped their respective biologies/ecologies, as well as what they imply for their use by humans. We present, as figures, the results of our exploratory analysis of Brazilian Red Book of Threatened Species of Fauna (2018), focusing on the small-sized ones, with up to 15 cm of standard length. We continue to present the main human impacts in small fish environments, along with those suffered by medium to large fish environments, and then follow by their respective deleterious effects. Finally, we present a general synthesis, reinforcing the enormous importance of small fish conservation and their respective preferred environments, followed by our main conclusions, and possible conservation strategies.

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 Iktiofauna air tawar Pulau Enggano, Indonesia

2018 ◽  
Vol 17 (3) ◽  
pp. 273
Author(s):  
Renny Kurnia Hadiaty ◽  
Sopian Sauri
Keyword(s):  
Resource Management ◽  
Freshwater Fish ◽  
Field Survey ◽  
Fish Fauna ◽  
Basic Data ◽  
Outer Island ◽  
Freshwater Fish Fauna ◽  
Taxonomical Status

Enggano is an outer island of the archipelago country, Indonesia. A field survey of freshwater fish fauna conducted in Enggano island to get the information of the ichthyofauna of this island. The fish collected in 11 freshwaters. We got 457 fish specimens of 28 species in 11 families and three orders. One species, Stiphodon sp. suspected to be new to science and five species require further study to clarify their taxonomical status. All of the fish collected specimens deposited in 77 catalog numbers of Museum Zoologicum Bogoriense (MZB). The ichthyofauna of this island could be use as the basic data for the resource management of the Enggano island. AbstrakPulau Enggano merupakan satu pulau terluar dari negara kepulauan, Indonesia. Survei ikan air tawar dilakukan di Pulau Enggano dengan tujuan untuk mendapatkan informasi iktiofauna yang ada di pulau ini. Koleksi sampel ikan dilakukan di 11 perairan tawar. Kami memperoleh 457 spesimen dari 28 spesies yang termasuk dalam 11 famili dan 3 ordo. Satu jenis diantaranya, Stiphodon sp. diduga merupakan jenis baru dan lima jenis lainnya perlu dikaji lebih lanjut untuk mengetahui status taksonominya. Semua spesimen hasil koleksi dideposit di Museum Zoologicum Bogoriense (MZB) dalam 77 nomor MZB. Diharapkan data iktiofauna pulau ini dapat digunakan sebagai dasar pertimbangan pemerintah daerah dalam pengelolaan sumber daya P. Enggano.

scholarly journals Decline in New Zealand's freshwater fish fauna: Effect of land use

2020 ◽  
Author(s):  
Michael Joy ◽  
KJ Foote ◽  
P McNie ◽  
M Piria
Keyword(s):  
New Zealand ◽  
Land Cover ◽  
Freshwater Fish ◽  
Native Species ◽  
Species Abundance ◽  
Fish Fauna ◽  
Fish Distribution ◽  
Individual Species ◽  
Freshwater Fish Fauna ◽  
Over Time

© 2019 CSIRO. The number of New Zealand's freshwater fish listed as threatened has increased since 1992 when the first New Zealand threat classification system list was compiled. In this study, temporal and land cover-related trends were analysed for data on freshwater fish distribution, comprising more than 20 000 records for the 47 years from January 1970 to January 2017 from the New Zealand Freshwater Fish Database. The analysis included individual species abundance and distribution trends, as well as an index of fish community integrity, namely the Index of Biotic Integrity (IBI). Of the 25 fish species that met the requirements for analysis to determine changes in the proportion of sites they occupied over time, 76% had negative trends (indicating declining occurrence). Of the 20 native species analysed for the proportion of sites occupied over time, 75% had negative trends; 65% of these were significant declines and more species were in decline at pasture sites than natural cover sites. The average IBI score also declined over the time period and, when analysed separately, the major land cover types revealed that the IBI declined at pasture catchment sites but not at sites with natural vegetation catchments.

scholarly journals The fish fauna of streams in the Madeira-Purus interfluvial region, Brazilian Amazon

Check List ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 768 ◽  
Author(s):  
Daniela de França Barros ◽  
Jansen Zuanon ◽  
Fernando Pereira De Mendonça ◽  
Helder Mateus Viana Espírito Santo ◽  
André Vieira Galuch ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Fish Fauna ◽  
Brazilian Amazon ◽  
Neotropical Region ◽  
Environmental Conservation ◽  
Taxonomic Group ◽  
Conservation Strategies ◽  
Species Richness And Diversity ◽  
High Species Richness

Small headwaters streams of the Neotropical region usually have high species richness and diversity. This study aimed to investigate the species composition and abundance of fish fauna in the headwaters streams of the Madeira-Purus interfluvial plain in the Brazilian Amazon. A total of 22 streams of 1st to 3rd order were sampled during two expeditions at two separate locations in April-May and July of 2007. A total of 5508 fishes were captured using hand and small seine nets, belonging to 78 species, 22 families and six orders. Characiformes was the most diverse taxonomic group in the samples, followed by Gymnotiformes and Siluriformes. Our findings indicate that the fish fauna of streams in the Madeira- Purus interfluvial plain is both rich and diverse and should be considered during the implementation of strengthened environmental conservation strategies in this region. 

DNA barcoding and phylogenetics of freshwater fish fauna of Ranganadi River, Arunachal Pradesh

Gene ◽  
2020 ◽  
Vol 754 ◽  
pp. 144860
Author(s):  
Pramod Kumar Pandey ◽  
Yambem Suresh Singh ◽  
Partha Sarathi Tripathy ◽  
Ram Kumar ◽  
Santosh Kumar Abujam ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Dna Barcoding ◽  
Fish Fauna ◽  
Arunachal Pradesh ◽  
Freshwater Fish Fauna

The effects of acidification on Scandinavian freshwater fish fauna

1984 ◽  
Vol 305 (1124) ◽  
pp. 517-528 ◽  
Keyword(s):  
Freshwater Fish ◽  
Surface Area ◽  
Aquatic Ecosystems ◽  
Fish Fauna ◽  
Fish Populations ◽  
Lake Surface ◽  
Southwest Coast ◽  
Freshwater Fish Fauna ◽  
Lake Surface Area ◽  
Southern Norway

Acidification of freshwaters have inflicted a m ajor perturbation on Scandinavian aquatic ecosystems as indicated by severe regional loss of fish populations. This decline was first noted in the early 1920s but became particularly severe after W orld W ar II in the 1950s and 1960s. In southern Norway regional dam age is now docum ented in an area of 33000 km 2 , 13000 km 2 of which are devoid offish. Several m ajor southern salmon rivers are now barren. In Sweden more than 2500 lakes are docum ented to be affected. This corresponds to 3 -4 % of the total lake surface area. An additional 6000 lakes are assumed to be affected by acidification. Population losses are also found in thousands of kilometres of running w ater as well as in salmon and seatrout rivers on the southwest coast. This paper describes the early observations, chronology of this decline and reviews possible causes and mechanisms. The acidification and the associated loss of fishstocks over vast areas is apparently the most devastating change recorded for the fish fauna of Scandinavia

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