Comparation of oxylipin profiles as well as their substrates and synthetic enzymes transcriptional expression between marine fish Larimichthys crocea and freshwater fish Oncorhynchus mykiss

Aquaculture ◽  
2021 ◽  
Vol 539 ◽  
pp. 736641
Author(s):  
Shengnan Gao ◽  
Kun Cui ◽  
Yongnan Li ◽  
Yuning Pang ◽  
Wei Fang ◽  
...  
Keyword(s):  
Oncorhynchus Mykiss ◽  
Freshwater Fish ◽  
Marine Fish ◽  
Transcriptional Expression ◽  
Larimichthys Crocea ◽  
Synthetic Enzymes

Illegal trade of aquarium species through the Brazilian postal service in Ceará State

2018 ◽  
Vol 69 (1) ◽  
pp. 178 ◽  
Author(s):  
Lívio M. Gurjão ◽  
Glaura M. L. Barros ◽  
Daniele P. Lopes ◽  
Daniel A. N. Machado ◽  
Tito M. C. Lotufo
Keyword(s):  
Natural Resources ◽  
Freshwater Fish ◽  
Marine Fish ◽  
Threatened Species ◽  
Betta Splendens ◽  
Illegal Trade ◽  
Postal Service ◽  
Paulo State ◽  
Eastern Brazil ◽  
Renewable Natural Resources

Brazil is one of the main suppliers of aquarium species globally, and Ceará state is a recognised trading centre for this activity. Despite Brazilian Postal Law forbidding the mailing of live or dead organisms, smugglers still use this service to transport aquarium species throughout the country. To assess this unlawful practice, the Brazilian Institute of the Environment and Renewable Natural Resources (IBAMA, Instituto Brasileiro do Meio Ambiente e dos Recursos Naturais Renováveis) and the Brazilian Post and Telegraph Co. (ECT, Empresa Brasileira de Correios e Telégrafos) conducted 57 confiscations involving domestic transportation only. The main origin and principal destination of the confiscated packages was south-eastern Brazil, especially São Paulo state, where package inspections must be intensified. Considering all groups of seized species, freshwater fish were by far the most represented organisms due to intense translocation of Betta splendens. Some of the confiscated marine fish, echinoderms and cnidarians are included in the Brazilian List of Threatened Species; thus, their exploitation is restricted or forbidden. In addition, only 18 of the seized species were native to Brazil, and just 12 of them occur naturally in Ceará state, which both raises concerns about potential bioinvasions and demands more control by the Brazilian authorities of smuggled species. Although some illegal traders were repeatedly caught mailing organisms, confiscations do seem to mitigate the illicit transportation of species to some extent.

Comparative Effects of Temperature on the Sodium and Water Permeabilities of the Gills of a Stenohaline Freshwater Fish (Carassius Auratus) and a Stenohaline Marine Fish (Serranus Scriba, Serranus Cabrilla)

1972 ◽  
Vol 57 (2) ◽  
pp. 359-366 ◽  
Author(s):  
J. ISAIA
Keyword(s):  
Freshwater Fish ◽  
Marine Fish ◽  
Osmotic Gradient ◽  
Water Fluxes ◽  
Simple Diffusion ◽  
Temperature Changes ◽  
Diffusional Permeability ◽  
Effects Of Temperature ◽  
Sea Perch ◽  
Branchial Membrane

1. Comparative effects of temperature on the permeability of the gill to water and to sodium were studied in the marine sea perch Serranus and the freshwater goldfish Carassius. 2. The acclimation Q10 for the water fluxes is higher in the freshwater fish than in the marine fish. 3. In the goldfish the osmotic permeability (Pos) is greater than the diffusional permeability (Pdlf) at all acclimation temperatures, suggesting the presence of ‘waterfilled channels’ in the branchial membrane. In the sea perch, on the other hand, Pos/Pdlf is approximately 1, indicating that water movements probably occur by simple diffusion. 4. The permeabilities to water and to sodium are similar in the sea perch but very different in the goldfish. Considering these results together with those from a similar study on an elasmobranch, it would seem that the more perfect the semipermeability of the gill membrane and the weaker the transepithelial osmotic gradient, the greater is the branchial porosity. 5. Assuming that temperature changes do not cause modification of the branchial surface or relative permeabilities to water and to sodium the independence of the temperature-coefficient variations for water and for sodium indicates a certain dissociation between the movements of salt and of water, in the sea perch. In the goldfish, assuming a constant branchial surface and in view of the fact that Pos > Pdif the high temperature coefficients for the water fluxes suggest that the water in the ‘water-filled channels’ is in a highly organized state.

scholarly journals The sequencing and de novo assembly of the Larimichthys crocea genome using PacBio and Hi-C technologies

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Baohua Chen ◽  
Zhixiong Zhou ◽  
Qiaozhen Ke ◽  
Yidi Wu ◽  
Huaqiang Bai ◽  
...  
Keyword(s):  
Marine Fish ◽  
Single Molecule ◽  
Large Scale ◽  
Reference Genome ◽  
De Novo ◽  
Larimichthys Crocea ◽  
Chromosome Conformation ◽  
Protein Coding ◽  
Total Length ◽  
Chromosome Level

Abstract Larimichthys crocea is an endemic marine fish in East Asia that belongs to Sciaenidae in Perciformes. L. crocea has now been recognized as an “iconic” marine fish species in China because not only is it a popular food fish in China, it is a representative victim of overfishing and still provides high value fish products supported by the modern large-scale mariculture industry. Here, we report a chromosome-level reference genome of L. crocea generated by employing the PacBio single molecule sequencing technique (SMRT) and high-throughput chromosome conformation capture (Hi-C) technologies. The genome sequences were assembled into 1,591 contigs with a total length of 723.86 Mb and a contig N50 length of 2.83 Mb. After chromosome-level scaffolding, 24 scaffolds were constructed with a total length of 668.67 Mb (92.48% of the total length). Genome annotation identified 23,657 protein-coding genes and 7262 ncRNAs. This highly accurate, chromosome-level reference genome of L. crocea provides an essential genome resource to support the development of genome-scale selective breeding and restocking strategies of L. crocea.

Endocrine disruption in marine fish

2003 ◽  
Vol 75 (11-12) ◽  
pp. 2249-2261 ◽  
Author(s):  
P. Matthiessen
Keyword(s):  
Freshwater Fish ◽  
Endocrine Disruption ◽  
Marine Fish ◽  
Marine Environment ◽  
Population Level ◽  
Marine Species ◽  
Future Research ◽  
Freshwater Species ◽  
Top Predators

This topic reviews the whole field of endocrine disruption (ED) in marine fish and compares this with our knowledge of the situation in freshwater species. In broad terms, similar types of ED have been observed in the two groups, although effects in the marine environment tend to be less marked, presumably due to dispersion and dilution. There are, however, some data which suggest that marine fish that are top-predators can experience ED due to biomagnification of organochlorines. Processes such as smoltification, metamorphosis, and hermaphroditism, which are common in some marine species, may be particularly susceptible to ED, but have as yet been scarcely studied. As with freshwater fish, firm links to population-level effects have not yet been demonstrated, although it is not unreasonable to suppose that they are occurring in some locations. The topic concludes with some recommendations for future research.

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