scholarly journals An Annotated Checklist to the Commonly Harvested Crabs (Crustacea: Decapoda) from Marine and Brackish Water Ecosystems of Palawan, Philippines

2020 ◽  
Vol 5 ◽  
Author(s):  
Billie Subang ◽  
◽  
Riza San Juan ◽  
Grecel Fatima Ventura ◽  
Nonillon Aspe
Keyword(s):  
Brackish Water ◽  
Water Ecosystems ◽  
Annotated Checklist

scholarly journals Fish diversity in freshwater and brackish water ecosystems of Russia and adjacent waters

2020 ◽  
Vol 45 ◽  
pp. 47-116
Author(s):  
YURY V. DYLDIN ◽  
LUBOMIR HANEL ◽  
RONALD FRICKE ◽  
ALEXEI M. ORLOV ◽  
VLADIMIR I. ROMANOV ◽  
...  
Keyword(s):  
Brackish Water ◽  
Fish Diversity ◽  
Water Ecosystems

scholarly journals Checklist of the fresh and brackish water snails (Mollusca, Gastropoda) of Bénin and adjacent West African ecoregions

ZooKeys ◽  
2020 ◽  
Vol 942 ◽  
pp. 21-64
Author(s):  
Zinsou Cosme Koudenoukpo ◽  
Olaniran Hamed Odountan ◽  
Bert Van Bocxlaer ◽  
Rose Sablon ◽  
Antoine Chikou ◽  
...  
Keyword(s):  
West Africa ◽  
Brackish Water ◽  
Conservation Status ◽  
West African ◽  
Extensive Literature ◽  
Field Surveys ◽  
Data Deficient ◽  
Water Ecosystems ◽  
Taxonomic Studies ◽  
Biodiversity Information

Currently no comprehensive checklist of fresh and brackish water gastropods from Bénin exists, and those for adjacent West African areas are outdated. Yet, such checklists provide essential biodiversity information and a consistent taxonomic and nomenclatural framework for that biodiversity. Here a first checklist of the fresh and brackish water gastropods from Bénin and adjacent West African ecoregions is presented, based on an extensive literature review and field surveys between September 2014 and June 2019 in six major fresh and brackish water ecosystems in Bénin. This inventory includes information on synonymy, species distribution in West Africa, habitats, and conservation status. The fresh and brackish water gastropod fauna includes 60 species, belonging to 28 genera and 16 families. Pachychilidae, Ampullariidae, Neritidae, and Bulinidae were the most diverse families with 9, 8, 7, and 7 species, respectively. However, literature and field data indicated that 23 species observed in West African basins that extend to Bénin do not occur in the territory of Bénin. These species were not detected in our field surveys, most likely because they are rare at collecting sites. Of the 60 species included, five are classified as “Data Deficient”, 43 as “Least Concern”, two as “Nearly Threatened”, one as “Vulnerable”, and six as “Endangered” by the IUCN, whereas the remaining three species were not evaluated. Because the taxonomy of fresh and brackish water gastropods in West Africa is still largely based on morphology, comparative molecular and taxonomic studies may result in substantial revisions of this checklist over the coming years.

A novel salt-tolerant genotype illuminates the sucrose gene evolution in freshwater bloom-forming cyanobacterium Microcystis aeruginosa

2019 ◽  
Vol 366 (15) ◽  
Author(s):  
Yuuhiko Tanabe ◽  
Haruyo Yamaguchi ◽  
Tomoharu Sano ◽  
Masanobu Kawachi
Keyword(s):  
Microcystis Aeruginosa ◽  
Brackish Water ◽  
Evolutionary History ◽  
Gene Evolution ◽  
Water Bloom ◽  
Salt Tolerant ◽  
Whole Genome Analysis ◽  
Gene Expression Analyses ◽  
History Of ◽  
Water Ecosystems

ABSTRACT Microcystis aeruginosa is a water bloom-forming cyanobacterium found in fresh and brackish water ecosystems worldwide. Previously, we showed that several instances of M. aeruginosa bloom in brackish water can be explained by the proliferation of salt-tolerant M. aeruginosa strains harboring genes for a compatible solute sucrose. However, evolutionary history of sucrose genes in M. aeruginosa remains unclear because salt-tolerant strains have been poorly described. Here, we characterized a novel salt-tolerant strain of M. aeruginosa (NIES-4325) isolated from the brackish water of Lake Abashiri, Japan. A whole-genome analysis of M. aeruginosa NIES-4325 identified genes for sucrose synthesis (sppA, spsA and susA). Quantitative sucrose and gene expression analyses suggested that sucrose is implicated in acclimation to high salt in NIES-4325. Notably, the sucrose genes of M. aeruginosa are monophyletic, yet sucrose genes of NIES-4325 are highly divergent from those of other salt-tolerant M. aeruginosa strains. This suggests an early sucrose gene import into M. aeruginosa from other cyanobacteria, followed by multiple losses during intraspecific diversification. One of a few survivors of salt-tolerant strains is a likely donor of recent horizontal spreads of sucrose genes across M. aeruginosa lineages.

scholarly journals The fisheries resources at sub-zones irrigation works of Omon - Xano and Quan Lo - Phung Hiep in the Ca Mau peninsula

2019 ◽  
Vol 18 (01) ◽  
pp. 98-108
Author(s):  
Van V. Mai
Keyword(s):  
Fish Species ◽  
Brackish Water ◽  
Irrigation System ◽  
Freshwater Ecosystems ◽  
Community Based ◽  
Fisheries Resources ◽  
Water Ecosystems ◽  
Notopterus Notopterus ◽  
Natural Water Bodies ◽  
Indigenous Fish Species

A study on the fisheries resources at sub-zones irrigation works of O Mon - Xa No and Quan Lo - Phung Hiep in the Ca Mau Peninsula was conducted from January to December 2016. The data on fish species compositions were collected from the field in six times a year in combination with using the prepared questionnaire for interviews of 240 fishing households inside and outside the irrigation system (IS) area in two freshwater and brackish water ecosystems. The results showed that the composition of fish species in the study area was diverse. The size of major fish species recorded in the study area was relatively small. The production of fish and shrimp in 2016 decreased by 50 - 60% as compared to 2012 and the production inside the IS area was lower than that outside the IS area in both ecosystems. Some indigenous fish species, such as Channalucius, Notopterus notopterus, Clarias macrocephalus, Clarias batrachus, Morulius chrysophekadion and Toxotes chatareus were rarely found in freshwater ecosystems. Similarly, the indigenous fish species of Arius maculatus and Otolithoides biauritus were rarely found in brackish water. Pterygoplichthys disjunctivus has established populations in many natural water bodies in this study area resulting in a threat to competition, diversity and abundance of indigenous fish species. There were many reasons for the significant decline of fisheries resources; for example, the IS has blocked the migration of aquatic species. Many fishermen used electricity, poisoning, catching broodfish and fry during breeding season and water pollution by waste from aquaculture pond rehabilitation in the study area. Thus, it is necessary to deploy a community-based model of fishery resources management and preservation in the Ca Mau Peninsula.

scholarly journals ​An Annotated Checklist of Finfish and Shellfish Diversity of Pulicat Lake, Southeast Coast of India

2021 ◽  
Author(s):  
N. Jesintha ◽  
N. Jayakumar ◽  
K. Karuppasamy ◽  
B. Ahilan ◽  
D. Manikandavelu ◽  
...  
Keyword(s):  
Trophic Level ◽  
Brackish Water ◽  
Habitat Preference ◽  
Tamil Nadu ◽  
Andhra Pradesh ◽  
South India ◽  
Fishing Villages ◽  
Pulicat Lake ◽  
Fishery Status ◽  
Annotated Checklist

Background: Pulicat lake is the second largest brackish water lagoon in the country, lying partly in Andhra Pradesh and Tamil Nadu states along the Coromandel Coast of South India. The present paper gives information on occurrence, habitat preference, trophic level, human utility and fishery status of finfish and shellfish species of the Pulicat Lake. Methods: An extensive survey was conducted on finfish and shellfish diversity of Pulicat Lake from November 2019 to March 2021, selecting four fish landing centres viz, Pazhaverkadu, Arambakkam (fishing villages in Tamil Nadu), Venadu and Vatembedu (fishing villages in Andhra Pradesh) situated along the Lake. Result: In the present study, A total of 145 species including species of finfishes (95), prawns (8), crabs (7) and 35 molluscs (35) were documented from the Lake. Among the four selected landing centres, the highest diversity was observed in Pazhaverkadu, registering 143 species followed by Arambakkam (123), Vatembedu (85) and Venadu (77).

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