News Release on Freshwater Research: September-2018

An Ocean-Dwelling Fish Genetically Adapted to Freshwater in Just 120 Years

Steelhead trout, members of the salmon family that live and grow within the Pacific, genetically custom-made to the fresh setting of Michigan in lower than a hundred and twenty years, consistent with new analysis.

Steelhead was by design introduced into Michigan within the late 1800s so as to bolster recreational and industrial fisheries. In their native vary, that extends from Golden State to Russia, steelhead hatch in fresh rivers, migrate to the ocean and come back to fresh to spawn. [1]

The complete mitochondrial genome of a freshwater mussel Nodularia douglasiae (Bivalvia: Unionidae)

The circular F-type mitochondrial ordination (15,761 bp) was completely sequenced for a Korean freshwater mussel Nodularia douglasiae (synonym Unio douglasiae; Unionidae, Unionidae, Bivalvia). It contains thirteen PCGs, 2 rRNA genes, and twenty-two RNA genes, as usually shown in creature mitochondrial genomes. Its factor order is just like that of F-type mitochondrial genomes ascertained in alternative fresh mussels. [2]

Assessment of Freshwater Inflow and Water Quality for an Urbanized, Subtropical Estuary (Lake Worth Lagoon, Florida, USA)

Coastal water bodies square measure wedged by watershed alterations, magnified population density, modifications to inlets and shorelines, environmental condition cyclicity, and will increase in external material masses. Estuaries cherish Lake value lagune (LWL) in south Sunshine State possess of these attributes. The LWL watershed extends from the southeastern portion of the lake through Palm Beach County, wherever it meets the laguna. Palm Beach County Department of Environmental Resources Management acknowledges the social and ecological importance of the ~ 36-kilometer lagune and aims to take care of appropriate water and surround quality for all stakeholders. Recent declines and shifts of seaweed distribution on the lagune prompted a step toward higher understanding the water quality patterns of the system. In support of those efforts, this study assessed plumbing, inflow, flushing, and water quality attributes (chlorophyll a, salinity, total element, total phosphorus, total suspended solids, turbidity) mistreatment knowledge collected on a series of fourteen mid-lagoon stations from 2007 to 2015. [3]

Freshwater diatoms diversify faster than marine in both planktonic and benthic habitats

The marine-freshwater divide may be a key determinant of the distribution and variety of aquatic organisms. several clades that span the salinity gradient area unit disproportionately a lot of variation within the younger, transitory, and fewer overabundant fresh environments than they’re within the marine realm, that covers most of the part. variations within the rates of accumulation and loss of diversity between marine and freshwaters contribute to those diversity imbalances. Assessing the salinity gradient beside different potential interacting variables will offer vital extra insights. Diatoms, a species-rich lineage of chemical process protists, show a putting diversity imbalance across the marine-freshwater divide, however conjointly between organism and biogeographical region habitats, creating them a superb system to review such interactions. we tend to used a completely unique set of state evolution and extinction models to indicate that the salinity–habitat interaction was vital for phytoplankton diversification which each organism and biogeographical region lineages turnover quicker in freshwaters. [4]

On the Environmental Impact of Freshwater Fish Farms in Greece and in Iceland

In the gift study, we tend to target the chemical element and phosphorus levels generated by open flow seafood farms in Balkan country and Iceland wherever soft-finned fish square measure cultivated. There square measure many variations within the legislation and regulation of the cultivation sector in Balkan country and in Iceland. still, in each country, environmental protection agencies would like correct data for nutrient processes so as to gauge the environmental influence on encompassing waters by salmon cultivation. information was collected from surveys of twenty-one seafood farms in the Balkan country and nine in Iceland. The surveyed farms practiced intensive production ways. The concentrations of chemical element and phosphorus in farms’ discharges were accustomed estimate organic load generated. The collected information was compared with information from the literature for the assembly Salmonids for species cultivated in Iceland (Arctic char, Atlantic salmon) and in Balkan country (Rainbow trout). [5]

Reference

[1] An Ocean-Dwelling Fish Genetically Adapted to Freshwater in Just 120 Years

PURDUE UNIVERSITY, 24 JUN 2018 (web link)

[2] The complete mitochondrial genome of a freshwater mussel Nodularia douglasiae (Bivalvia: Unionidae)

Cha SH, Lee JH, Choi EH, Jang KH, Lim YJ, Kim SG, Ryu SH, Lee YS, Hwang UW. The complete mitochondrial genome of a freshwater mussel Nodularia douglasiae (Bivalvia: Unionidae). Mitochondrial DNA Part B. 2018 Jul 3;3(2):947-8. (web link)

[3] Assessment of Freshwater Inflow and Water Quality for an Urbanized, Subtropical Estuary (Lake Worth Lagoon, Florida, USA)

Buzzelli C, Chen Z, Doering P, Kahn A. Assessment of Freshwater Inflow and Water Quality for an Urbanized, Subtropical Estuary (Lake Worth Lagoon, Florida, USA). Marine Technology Society Journal. 2018 Jul 1;52(4):19-31. (web link)

[4] Freshwater diatoms diversify faster than marine in both planktonic and benthic habitats

Nakov T, Beaulieu JM, Alverson AJ. Freshwater diatoms diversify faster than marine in both planktonic and benthic habitats. (web link)

[5] On the Environmental Impact of Freshwater Fish Farms in Greece and in Iceland

  1. Mavraganis1*, H. Thorarensen1, M. Tsoumani2, and C. Nathanailides3,4

1School of Fish Biology and Aquaculture, Holar University College, 551 Saudarkrokur, Iceland.

2Ministry of Rural Development and Food, Hydrobiological Station of Ioannina, 45500, Ioannina, Greece.

3Department Aquaculture and Fisheries, Technological Educational Institute of W. Greece, Messolonghi, 30200, Greece.

4Laboratory of Ichthyology and Fish Diseases, Department of Veterinary Medicine, University of Thessaly, Karditsa, 43100, Greece. (web link)

Add a Comment

Your email address will not be published.