Late Pleistocene fishes of the Tennessee River Basin: an analysis of a late Pleistocene freshwater fish fauna from Bell Cave (site ACb-2) in Colbert County, Alabama, USA

Draw Science ◽  
10.18516/0022 ◽  
2016 ◽  
Vol 2 ◽  
PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e1648 ◽  
Author(s):  
Stephen J. Jacquemin ◽  
Jun A. Ebersole ◽  
William C. Dickinson ◽  
Charles N. Ciampaglio

The Tennessee River Basin is considered one of the most important regions for freshwater biodiversity anywhere on the globe. The Tennessee River Basin currently includes populations of at least half of the described contemporary diversity of extant North American freshwater fishes, crayfish, mussel, and gastropod species. However, comparatively little is known about the biodiversity of this basin from the Pleistocene Epoch, particularly the late Pleistocene (∼10,000 to 30,000 years B.P.) leading to modern Holocene fish diversity patterns. The objective of this study was to describe the fish assemblages of the Tennessee River Basin from the late Pleistocene using a series of faunas from locales throughout the basin documented from published literature, unpublished reports, and an undocumented fauna from Bell Cave (site ACb-2, Colbert County, AL). Herein we discuss 41 unequivocal taxa from 10 late Pleistocene localities within the basin and include a systematic discussion of 11 families, 19 genera, and 24 identifiable species (28 unequivocal taxa) specific to the Bell Cave locality. Among the described fauna are several extirpated (e.g., Northern PikeEsox lucius, Northern MadtomNoturus stigmosus) and a single extinct (Harelip SuckerMoxostoma lacerum) taxa that suggest a combination of late Pleistocene displacement events coupled with more recent changes in habitat that have resulted in modern basin diversity patterns. The Bell Cave locality represents one of the most intact Pleistocene freshwater fish deposits anywhere in North America. Significant preservational, taphonomic, sampling, and identification biases preclude the identification of additional taxa. Overall, this study provides a detailed look into paleo-river ecology, as well as freshwater fish diversity and distribution leading up to the contemporary biodiversity patterns of the Tennessee River Basin and Mississippi River Basin as a whole.


2018 ◽  
Vol 17 (3) ◽  
pp. 273
Author(s):  
Renny Kurnia Hadiaty ◽  
Sopian Sauri

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.


2020 ◽  
Author(s):  
Michael Joy ◽  
KJ Foote ◽  
P McNie ◽  
M Piria

© 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.


Gene ◽  
2020 ◽  
Vol 754 ◽  
pp. 144860
Author(s):  
Pramod Kumar Pandey ◽  
Yambem Suresh Singh ◽  
Partha Sarathi Tripathy ◽  
Ram Kumar ◽  
Santosh Kumar Abujam ◽  
...  

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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