Identification of follicular vitellogenesis stage by monitoring of plasma calcium and estradiol-17β concentrations in the cultured Caspian brown trout, Salmo trutta caspius Kessler, 1877

Jamalzadeh, Hamid Reza; Hajirezaee, Saeed; Nazeri, Samane; Khara, H; Mirrasuli, Elham

doi:10.2478/s11756-012-0065-2

Cited by 4 publications

(5 citation statements)

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“…Stage-2 fish had the highest levels of VTG, but the degree of variability among gestation stages precluded the use of this measure as a reliable diagnostic tool. Similarly, plasma Ca 2+ concentrations could be used to differentiate male from female Yelloweye Rockfish, which did corroborate the results of other studies (Webb et al 2002;Jamalzadeh et al 2012). Unlike VTG, females in stage 2 of gestation could be differentiated from other stages because they exhibited significantly higher Ca 2+ levels.…”

Section: Discussionsupporting

confidence: 86%

“…Nonlethal methods for determining fish sex and female reproductive status include measurements of plasma VTG and/or calcium (Ca 2+ ) concentrations Webb et al 2002;Linares-Casenave et al 2003;Hinck et al 2011;Jamalzadeh et al 2012). Vitellogenin has been quantified as a measure for determining sex and female stage of reproductive maturity for many fish species, including rockfishes Linares-Casenave et al 2003;Martin-Mills 2007).…”

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confidence: 99%

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Reproductive Status and Blood Plasma Indicators of Sex and Gonad Maturation Status for Yelloweye Rockfish Following Barotrauma and Recompression Events

Blain

Sutton

2016

Trans Am Fish Soc

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Discard mortality of rockfishes Sebastes spp. is a management concern along the West Coast of North America. Although many rockfish species survive after barotrauma and forced recompression, it is unclear whether these mechanisms affect reproductive success. We examined whether (1) Yelloweye Rockfish S. ruberrimus in Prince William Sound, Alaska, could reproduce up to 2 years after one or more barotrauma and recompression events; and (2) blood plasma indicators (i.e., vitellogenin [VTG] and calcium [Ca2+]) could be used to identify sex and gonad maturation stage. In 2010, we captured and examined Yelloweye Rockfish that had been tagged in 2008 and 2009, and all mature females were gravid or spent. The most common barotrauma sign was esophageal eversion, with females and males exhibiting this injury 50% and 90% of the time, respectively. All other injuries, except swim bladder ruptures and tears, occurred at low frequencies and (with the exception of esophageal eversion) increased in frequency with capture depth. Mean plasma VTG concentrations for females were greater than those for males; with the exception of stage‐0 females, there were no differences in VTG among female gestation stages. Mean plasma Ca2+ concentrations for stage‐2 females differed from those of males, stage‐0 recruits, and immature fish. However, there was no difference in mean Ca2+ among female reproductive stages. These results indicate that reproduction of Yelloweye Rockfish is not affected after barotrauma and recompression events and that blood plasma measures show variable success as indicators of sex and female reproductive status. Received March 16, 2016; accepted August 12, 2016 Published online September 30, 2016

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Section: Discussionsupporting

confidence: 86%

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confidence: 99%

Reproductive Status and Blood Plasma Indicators of Sex and Gonad Maturation Status for Yelloweye Rockfish Following Barotrauma and Recompression Events

Blain

Sutton

2016

Trans Am Fish Soc

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“…Notable in this regard were several genes involved with calcium metabolism (e.g., two ryanodine receptors RYR1 and RYR3, as well as CACNB1) (Additional file 14 ; Additional file 15 ). Enhanced calcium levels have previously been reported in female compared to male fish, as Ca ++ ion actively binds to vitellogenin and is important in egg development [ 34 , 35 ]. Thus, even in 15-month old juveniles, calcium sequestration appears to differ between the sexes.…”

Section: Resultsmentioning

confidence: 99%

Transcriptome profiling in fast versus slow-growing rainbow trout across seasonal gradients

et al. 2016

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BackgroundCircannual rhythms in vertebrates can influence a wide variety of physiological processes. Some notable examples include annual reproductive cycles and for poikilotherms, seasonal changes modulating growth. Increasing water temperature elevates growth rates in fishes, but increases in photoperiod regime can have similar influences even at constant temperature. Therefore, in order to understand the dynamics of growth in fish it is important to consider the background influence of photoperiod regime on gene expression differences. This study examined the influence of a declining photoperiod regime (winter solstice) compared to an increasing photoperiod regime (spring equinox) on white muscle transcriptome profiles in fast and slow-growing rainbow trout from a commercial aquaculture strain.ResultsSlow-growing fish could be characterized as possessing transcriptome profiles that conform in many respects to an endurance training regime in humans. They have elevated mitochondrial and cytosolic creatine kinase expression levels and appear to suppress mTOR-signaling as evidenced by elevated TSC2 expression, and they also have elevated p53 levels. Large fish display a physiological repertoire that may be consistent with strength/resistance physiology having elevated cytoskeletal gene component expression and glycogen metabolism cycling along with higher PI3K levels. In many respects small vs. large fish match eccentric vs. concentric muscle expression patterns, respectively. Lipid metabolic genes are also more elevated in larger fish, the most notable being the G0S2 switch gene. M and Z-line sarcomere remodelling appears to be more prevalent in large fish. Twenty-three out of 26 gene families with previously reported significant SNP-based growth differences were detected as having significant expression differences.ConclusionsLarger fish display a broader array of genes showing higher expression, and their profiles are more similar to those observed in December lot fish (i.e., an accelerated growth period). Conversely, small fish display gene profiles more similar to seasonal growth decline phases (i.e., September lot fish). Overall, seasonal timing was coupled to greater differences in gene expression compared to differences associated with fish size.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-016-2363-5) contains supplementary material, which is available to authorized users.

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“…Further, lipid and fatty acid metabolism processes are co-regulated by hormones. For instance, in fish, during vitellogenesis, 17β-estradiol (E2) activates estrogen receptors (ERs) in the liver, with the subsequent synthesis of vitellogenin, the precursor of egg yolk proteins, which is later sequestered by the oocytes [ 11 ]. Experimental induction of lipid modulation by sex steroids in fish has also been studied.…”

Section: Introductionmentioning

confidence: 99%

A Proof-of-Concept for a Hypolipidemic Brown Trout Model

Lourenço,

Rocha,

Gonçalves

et al. 2024

Toxics

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The impacts of hypolipidemic pharmaceuticals on fish lipid metabolism remain unexplored. However, data points to similar effects and mechanisms of action between fish and humans. Therefore, fish may be a strong model for screening hypolipidemic drug candidates and water pollution by lipid-modulating agents. This study aimed to test a new hypolipidemic model assay with juvenile brown trout using atorvastatin (ATV)—a hypolipidemic chemical. We selected 17α-ethinylestradiol (EE2), known to cause hyperlipidemia in fish, to ensure model functionality. Fish received intramuscular injections of 4 μL/g for two weeks under the following experimental conditions: control—C (0.7% NaCl), solvent control—SC (0.7% NaCl, 0.9% ethanol, 0.1% dimethyl sulfoxide), ATV (0.3 μg/g), EE2 (2 μg/g), and a mixture of both compounds—MIX (0.3 μg/g ATV and 2 μg/g EE2). Endpoints included blood lipid biochemistry, hepatic lipid droplet quantification, and liver mRNA expression of lipid-related target genes (related to lipogenesis, lipid transport, and β-oxidation pathways). ATV lowered blood total cholesterol, high-density lipoproteins (HDL), and low-density lipoproteins (LDL) levels, whilst triglycerides and very-low-density lipoproteins (VLDL) were highest under EE2. Hepatic lipid droplet deposition significantly increased in the ATV, EE2, and MIX groups. ATV and MIX caused a significant downregulation of the peroxisome proliferator-activated receptor γ (pparγ) and acetyl Co-A oxidase 3 (acox3). EE2 upregulated acyl-CoA long-chain synthetase 1 (acsl1) and downregulated both fatty acid binding protein 1 (fabp1) and acetyl Co-A oxidase 1-3I (acox1-3I). ATV caused hypolipidemic effects in juvenile brown trout and could even counteract EE2-stimulated hyperlipidemia, reinforcing the potential of fish hypo- and hyperlipidemic models.

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Identification of follicular vitellogenesis stage by monitoring of plasma calcium and estradiol-17β concentrations in the cultured Caspian brown trout, Salmo trutta caspius Kessler, 1877

Cited by 4 publications

References 14 publications

Reproductive Status and Blood Plasma Indicators of Sex and Gonad Maturation Status for Yelloweye Rockfish Following Barotrauma and Recompression Events

Reproductive Status and Blood Plasma Indicators of Sex and Gonad Maturation Status for Yelloweye Rockfish Following Barotrauma and Recompression Events

Transcriptome profiling in fast versus slow-growing rainbow trout across seasonal gradients

A Proof-of-Concept for a Hypolipidemic Brown Trout Model

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