Depletion of selected polychlorinated biphenyl, dibenzodioxin, and dibenzofuran congeners in farmed rainbow trout (Oncorhynchus mykiss): A hint for safer fish farming

Chemosphere ◽  
2007 ◽  
Vol 66 (6) ◽  
pp. 1019-1030 ◽  
Author(s):  
Gianfranco Brambilla ◽  
Elena Dellatte ◽  
Igor Fochi ◽  
Nicola Iacovella ◽  
Roberto Miniero ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Polychlorinated Biphenyl ◽  
Fish Farming ◽  
Rainbow Trout Oncorhynchus Mykiss

scholarly journals Growth of rainbow trout (oncorhynchus mykiss) in the conditions of Tashkent province, Uzbekistan

2021 ◽  
Vol 258 ◽  
pp. 04040
Author(s):  
SH Sulaymonov ◽  
G Abdullaev ◽  
S Saidumarov
Keyword(s):  
Water Quality ◽  
Rainbow Trout ◽  
Dissolved Oxygen ◽  
Oncorhynchus Mykiss ◽  
Water Temperature ◽  
Fish Farming ◽  
Local Conditions ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Fish Productivity ◽  
Feed Coefficient

Rainbow trout is a new fish farming object for Uzbekistan, the adaptability of which (first of all, growth) to local conditions should be carefully studied. We analyzed the growth of rainbow trout in the conditions of flowing pools and cages in the foothill zone of Tashkent province of Uzbekistan. From March to October, the water temperature in the Khojikent reservoir varied from 4.9 to 13.1 °C, the amount of dissolved oxygen was 8.4 to 11.5 mg/l, and the pH was 7.40 to 7.67. In the flowing basin, the temperature was 15-18 °C, pH 7.2-7.5, the amount of dissolved oxygen 6.1-11.2 mg/l. The conditions of the foothill zones of Uzbekistan in terms of water quality are favorable for the development of trout breeding. During the season, fish in cages increased from 250 g to 623 g, in pools from 25 g to 390 g on average. The waste was 1.7%. The actual fish productivity of the basin is 39 kg/m3, the cage is 30 kg/m3 and the feed coefficient in the basin is 1.2, in the cages - 1.09.

scholarly journals First Identification and Characterization of Lactococcus garvieae Isolated from Rainbow Trout (Oncorhynchus mykiss) Cultured in Mexico

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1609
Author(s):  
Cesar Ortega ◽  
Rute Irgang ◽  
Benjamín Valladares-Carranza ◽  
Constanza Collarte ◽  
Ruben Avendaño-Herrera
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Consensus Sequence ◽  
Fish Farming ◽  
16S Rrna Gene Sequencing ◽  
Surveillance Program ◽  
Rrna Gene ◽  
Biochemical Tests ◽  
Lactococcus Garvieae ◽  
Rainbow Trout Oncorhynchus Mykiss

Lactococcosis is a hyperacute hemorrhagic septicemia disease caused by Lactococcus garvieae, which is an emerging pathogen in global fish farming. Between 2016 and 2018, rainbow trout (Oncorhynchus mykiss) from five farms that presented outbreaks were sampled as part of a Mexican surveillance program for the detection of fish diseases. Fourteen L. garvieae isolates were recovered from sampled fish, as confirmed by biochemical tests, 16S rRNA gene sequencing, and clinical and histological insights. The biochemical and protein profiles of the isolates obtained were homogeneous. Repetitive extragenic palindromic—(REP)—and enterobacterial repetitive intergenic consensus sequence PCR (ERIC-PCR) analyses established weak genetic heterogeneity. Rainbow trout challenged with two of the isolates used at different bacterial concentrations (10−2 and 10−4 CFU/mL) showed melanosis, and hemorrhages were observed in the fins, liver, kidney, and spleen. Isolates were obtained from all of the organs sampled, including from surviving fish, as either pure or mixed cultures. The present study is the first to confirm the presence of L. garvieae as the agent of severe lactococcosis outbreaks in the two primary Mexican states for trout farming.

scholarly journals Comparative Analysis of the Transcriptome and Distribution of Putative SNPs in Two Rainbow Trout (Oncorhynchus mykiss) Breeding Strains by Using Next-Generation Sequencing

Genes ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 841 ◽  
Author(s):  
Lidia de los Ríos-Pérez ◽  
Ronald Marco Brunner ◽  
Frieder Hadlich ◽  
Alexander Rebl ◽  
Carsten Kühn ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Gene Networks ◽  
Expression Patterns ◽  
High Stress ◽  
Head Kidney ◽  
Fish Farming ◽  
Specific Gene ◽  
Nucleotide Polymorphisms ◽  
Rainbow Trout Oncorhynchus Mykiss

Selective breeding can significantly improve the establishment of sustainable and profitable aquaculture fish farming. For rainbow trout (Oncorhynchus mykiss), one of the main aquaculture coldwater species in Europe, a variety of selected hatchery strains are commercially available. In this study, we investigated the genetic variation between the local Born strain, selected for survival, and the commercially available Silver Steelhead strain, selected for growth. We sequenced the transcriptome of six tissues (gills, head kidney, heart, liver, spleen, and white muscle) from eight healthy individuals per strain, using RNA-seq technology to identify strain-specific gene-expression patterns and single nucleotide polymorphisms (SNPs). In total, 1760 annotated genes were differentially expressed across all tissues. Pathway analysis assigned them to different gene networks. We also identified a set of SNPs, which are heterozygous for one of the two breeding strains: 1229 of which represent polymorphisms over all tissues and individuals. Our data indicate a strong genetic differentiation between Born and Silver Steelhead trout, despite the relatively short time of evolutionary separation of the two breeding strains. The results most likely reflect their specifically adapted genotypes and might contribute to the understanding of differences regarding their robustness toward high stress and pathogenic challenge described in former studies.

TOXICOKINETICS OF THREE POLYCHLORINATED BIPHENYL TECHNICAL MIXTURES IN RAINBOW TROUT (ONCORHYNCHUS MYKISS)

2004 ◽  
Vol 23 (7) ◽  
pp. 1725 ◽  
Author(s):  
Andrea H. Buckman ◽  
Scott B. Brown ◽  
Paul F. Hoekstra ◽  
Keith R. Solomon ◽  
Aaron T. Fisk
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Polychlorinated Biphenyl ◽  
Rainbow Trout Oncorhynchus Mykiss
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