scholarly journals Feeding Protocol Modulates the Digestive Process in Senegalese Sole (Solea senegalensis) Juveniles

2021 ◽  
Vol 8 ◽  
Author(s):  
Neda Gilannejad ◽  
Francisco J. Moyano ◽  
Gonzalo Martínez-Rodríguez ◽  
Manuel Yúfera
Keyword(s):  
Clock Genes ◽  
Temporal Organization ◽  
Solea Senegalensis ◽  
Senegalese Sole ◽  
Farmed Fish ◽  
Average Production ◽  
Experimental Treatments ◽  
Feeding Protocol ◽  
Aquaculture Production

Understanding the daily digestive function could lead to more efficient feeding practices in the farmed fish species. In this work, the effect of several daily feeding protocols was assessed on the daily expression of the genes related to the circadian system (arntl1, clock, per1, and cry1), appetite (cck), nutrients hydrolysis (try1, ctrb1, pga, atp4a, cel, and amy2a), peptides transport (slc15a1), pH, and activity of key digestive (trypsin, chymotrypsin, amylase, 4C- and 7C-like lipases) and absorptive (alkaline phosphatase) enzymes in the gastrointestinal tract (GIT) of Senegalese sole (Solea senegalensis) juveniles. Some of the tested feeding protocols demonstrated a significant influence on the entrainment of the peripheral oscillator. The synchrony of slc15a1 and some digestive proenzymes with per1 in some of the experimental treatments could underline the role of clock genes in the regulation of these biological functions. Unlike gene expression of the digestive proenzymes wherein feeding protocol occasionally affected the temporal organization, the influence of this factor was determinant on the daily average production and/or circadian pattern of their activities. Daily pH was maintained at approximately neutral levels in all the GIT segments, and no pepsin activity was detected. Fish fed a single diurnal meal showed the lowest activity for all the studied enzymes, except for amylase, suggesting an insufficient utilization of the ingested nutrients. Higher amylase activity in this group, on the other hand, implies the possible activation of alternative compensatory metabolic pathways. Overall, our results pointed to the suitability of higher feeding frequencies, especially during dark hours, for the aquaculture production of this species.

Sensory Changes in Farmed Senegalese Sole (Solea senegalensis) During Ice Storage

2007 ◽  
Vol 13 (2) ◽  
pp. 117-124 ◽  
Author(s):  
M. Tejada ◽  
C. De las Heras
Keyword(s):  
Solea Senegalensis ◽  
Eating Quality ◽  
Ice Storage ◽  
Senegalese Sole ◽  
Sensory Panel ◽  
Farmed Fish ◽  
Commercial Scale ◽  
Rearing Conditions ◽  
Muscle Color ◽  
Near Future

The access to a wider variety of farmed fish species is an increasing consumer demand. Solea sp. are considered excellent candidates to diversify this demand, although some problems persist to farm this species in a commercial scale. Exploratory work in Senegalese sole ( Solea senegalensis) is being done in different farming areas and it is plausible that its cultivation in a commercial scale will be done in the near future. For this reason it is important to know how this farmed species maintain its quality during ice storage. Senegalese sole from two different areas in Spain and different size and rearing conditions were analysed up to 28 days of ice storage to establish the eating quality and storage life determined by a sensory panel by means of a quality test in the cooked fillets and a quality index (QI) applying the QI method (QIM), shear resistance of the raw and cooked muscle, color and microbiological counts. The batches were rejected by the sensory panel at 22 and 25 days of storage. The commercial period determined for Senegalese sole is longer than that for other commercial farmed species. The differences between the two batches may be due to differences in size and rearing conditions.

New Insights on Intermediary Metabolism for a Better Understanding of Nutrition in Teleosts

2019 ◽  
Vol 7 (1) ◽  
pp. 195-220 ◽  
Author(s):  
S. Panserat ◽  
L. Marandel ◽  
I. Seiliez ◽  
S. Skiba-Cassy
Keyword(s):  
Fish Meal ◽  
Rapid Development ◽  
Fish Nutrition ◽  
Marine Resources ◽  
Farmed Fish ◽  
Fish Genome ◽  
The Past ◽  
Genome Complexity ◽  
Aquaculture Production

The rapid development of aquaculture production throughout the world over the past few decades has led to the emergence of new scientific challenges to improve fish nutrition. The diet formulations used for farmed fish have been largely modified in the past few years. However, bottlenecks still exist in being able to suppress totally marine resources (fish meal and fish oil) in diets without negatively affecting growth performance and flesh quality. A better understanding of fish metabolism and its regulation by nutrients is thus mandatory. In this review, we discuss four fields of research that are highly important for improving fish nutrition in the future: ( a) fish genome complexity and subsequent consequences for metabolism, ( b) microRNAs (miRNAs) as new actors in regulation of fish metabolism, ( c) the role of autophagy in regulation of fish metabolism, and ( d) the nutritional programming of metabolism linked to the early life of fish.

scholarly journals Role of the IFN I system against the VHSV infection in juvenile Senegalese sole (Solea senegalensis)

2016 ◽  
Vol 47 (1) ◽  
Author(s):  
Daniel Alvarez-Torres ◽  
Ana M. Podadera ◽  
Julia Bejar ◽  
Isabel Bandin ◽  
M. Carmen Alonso ◽  
...  
Keyword(s):  
Solea Senegalensis ◽  
Senegalese Sole

scholarly journals Antioxidants in Fish Sperm and the Potential Role of Melatonin

Antioxidants ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 36
Author(s):  
Francisca Félix ◽  
Catarina C. V. Oliveira ◽  
Elsa Cabrita
Keyword(s):  
Oxidative Stress ◽  
Fish Cell ◽  
Cell Protection ◽  
Factors Affecting ◽  
Fish Sperm ◽  
Scavenger Activity ◽  
Stress Damage ◽  
Novel Antioxidants ◽  
Aquaculture Production

In recent years, the effects of novel antioxidants have played an important role in the research focusing on fish cell protection. As food demand grows, aquaculture production becomes more intensive, and fish are more exposed to oxidative stress conditions, like high densities, temperature shifting, frequent fish handling and samplings, and prophylactic or disease treatments, which expose fish to a different environment. Particularly in reproduction, germ cells lose antioxidant capacity with spermatogenesis, as spermatozoa are more prone to oxidative stress. Antioxidants have been used in a variety of fish physiological problems including in reproduction and in the establishment of cryopreservation protocols. From the most used antioxidants to natural plant food and herbs, and endogenously produced antioxidants, like melatonin, a review of the literature available in terms of their effects on the protection of fish spermatozoa is presented here in a classified structure. Several direct and indirect approaches to improve gamete quality using antioxidants administration are mentioned (through feed supplementation or by adding in cryopreservation media), as well as factors affecting the efficiency of these molecules and their mechanisms of action. Special attention is given to the unclear melatonin pathway and its potential scavenger activity to prevent and counteract oxidative stress damage on fish spermatozoa.

scholarly journals Fish Pathology Research and Diagnosis in Aquaculture of Farmed Fish; a Proteomics Perspective

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 125
Author(s):  
Márcio Moreira ◽  
Denise Schrama ◽  
Ana Paula Farinha ◽  
Marco Cerqueira ◽  
Cláudia Raposo de Magalhães ◽  
...  
Keyword(s):  
Climate Changes ◽  
Holistic Approach ◽  
Disease Outbreak ◽  
External Factors ◽  
Pathogen Identification ◽  
Farmed Fish ◽  
Disease Research ◽  
Fish Pathology ◽  
Important Characterization ◽  
Aquaculture Production

One of the main constraints in aquaculture production is farmed fish vulnerability to diseases due to husbandry practices or external factors like pollution, climate changes, or even the alterations in the dynamic of product transactions in this industry. It is though important to better understand and characterize the intervenients in the process of a disease outbreak as these lead to huge economical losses in aquaculture industries. High-throughput technologies like proteomics can be an important characterization tool especially in pathogen identification and the virulence mechanisms related to host-pathogen interactions on disease research and diagnostics that will help to control, prevent, and treat diseases in farmed fish. Proteomics important role is also maximized by its holistic approach to understanding pathogenesis processes and fish responses to external factors like stress or temperature making it one of the most promising tools for fish pathology research.

scholarly journals Alteration of circadian machinery in monocytes underlies chronic kidney disease-associated cardiac inflammation and fibrosis

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuya Yoshida ◽  
Naoya Matsunaga ◽  
Takaharu Nakao ◽  
Kengo Hamamura ◽  
Hideaki Kondo ◽  
...  
Keyword(s):  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
Clock Genes ◽  
Serum Levels ◽  
Serum Retinol ◽  
Cardiac Inflammation ◽  
Physiological Processes ◽  
G Protein Coupled ◽  
Clock Protein

AbstractDysfunction of the circadian clock has been implicated in the pathogenesis of cardiovascular disease. The CLOCK protein is a core molecular component of the circadian oscillator, so that mice with a mutated Clock gene (Clk/Clk) exhibit abnormal rhythms in numerous physiological processes. However, here we report that chronic kidney disease (CKD)-induced cardiac inflammation and fibrosis are attenuated in Clk/Clk mice even though they have high blood pressure and increased serum angiotensin II levels. A search for the underlying cause of the attenuation of heart disorder in Clk/Clk mice with 5/6 nephrectomy (5/6Nx) led to identification of the monocytic expression of G protein-coupled receptor 68 (GPR68) as a risk factor of CKD-induced inflammation and fibrosis of heart. 5/6Nx induces the expression of GPR68 in circulating monocytes via altered CLOCK activation by increasing serum levels of retinol and its binding protein (RBP4). The high-GPR68-expressing monocytes have increased potential for producing inflammatory cytokines, and their cardiac infiltration under CKD conditions exacerbates inflammation and fibrosis of heart. Serum retinol and RBP4 levels in CKD patients are also sufficient to induce the expression of GPR68 in human monocytes. Our present study reveals an uncovered role of monocytic clock genes in CKD-induced heart failure.

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