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Fish Physiology and Biochemistry

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https://www.readbyqxmd.com/read/28321526/effects-of-fasting-temperature-and-photoperiod-on-preproghrelin-mrna-expression-in-chinese-perch
#1
Yi Song, Cheng Zhao, Xu-Fang Liang, Shan He, Changxu Tian, Xiaoyan Cheng, Xiaochen Yuan, Liyuan Lv, Wenjie Guo, Min Xue, Ya-Xiong Tao
Preproghrelin, a gut/brain peptide, plays an important role in the regulation of food intake and energy homeostasis in teleost and mammals. In the present study, we obtained the full-length preproghrelin cDNA in Chinese perch. The preproghrelin messenger RNA (mRNA) tissue expression showed that level was much higher in stomach and pituitary than in other tissues. The fasting study showed, after gastric emptying (3-6 h), short-term fasting (6-12 h) increased preproghrelin expression in the stomach. While in the pituitary, fasting reduced preproghrelin expression at 1, 3, 12, and 48 h, presenting state fluctuation of self-adjustment...
March 20, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28321525/dna-integrity-protecting-and-survival-promoting-activity-of-serotonergic-system-in-sturgeon-juveniles-and-sazans
#2
Arif A Mekhtiev, Turan N Allahverdiyeva, Sevda K Movsum-Zadeh
The study concerns evaluation of engagement of serotonergic system in the mechanisms of antimutagenic protection and survival under adverse conditions. It is shown that under long-term exposure to oil and industrial pollution, simultaneous sharp increase of mutations level in the erythrocytes and downregulation of serotonin-modulating anticonsolidation protein (SMAP; Mekhtiev 2000) in the livers of the sturgeon juveniles (Acipenser gueldenstaedtii persicus) is observed. Mutation level was evaluated by the micronucleus analysis and SMAP level-by the indirect ELISA-test utilizing anti-SMAP immunoglobulins...
March 20, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28315977/seasonal-expression-of-arginine-vasotocin-mrna-and-its-correlations-to-gonadal-steroidogenic-enzymes-and-sexually-dimorphic-coloration-during-sex-reversal-in-the-gilthead-seabream-sparus-aurata
#3
José J Reyes-Tomassini, Ten-Tsao Wong, Yonathan Zohar
Arginine vasotocin is a hormone produced in the hypothalamus of teleost fish that has been shown to regulate gonad development and sexual behavior. To study the role of arginine vasotocin in the gonadal cycle of the hermaphrodite gilthead seabream, Sparus aurata, we cloned the seabream arginine vasotocin (avt) complementary DNA (cDNA). We investigated the expression of brain avt throughout the gonad cycle using real-time quantitative PCR and compared its expression levels to the expression levels of two key gonadal steroidogenic enzymes, cyp19a1a and cyp11b2...
March 18, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28315163/activity-of-metabolic-enzymes-and-muscle-specific-gene-expression-in-parr-and-smolts-atlantic-salmon-salmo-salar-l-of-different-age-groups
#4
Maria V Churova, Olga V Meshcheryakova, Aleksey E Veselov, Denis A Efremov, Nina N Nemova
This study was conducted to characterize the energy metabolism level and the features of muscle growth regulation during the development of Atlantic salmon (Salmo salar) inhabiting the Indera River (Kola Peninsula, Russia). The activities of aerobic and anaerobic enzymes (cytochrome c oxidase and lactate dehydrogenase) and carbohydrate metabolism enzymes (glucose-6-phosphate dehydrogenase, glycerol-3-phosphate dehydrogenase, and aldolase) were measured in muscle and liver tissue. Gene expression levels of myosin heavy chain (MyHC), myostatin (MSTN-1a), and myogenic regulatory factors (MRFs-MyoD1a, MyoD1b, MyoD1c, Myf5, myogenin) were measured in the white muscles of salmon parr of ages 0+, 1+, 2+, and 3+ and smolts of ages 2+ and 3+...
March 18, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28315162/dietary-supplementation-of-curcumin-augments-heat-stress-tolerance-through-upregulation-of-nrf-2-mediated-antioxidative-enzymes-and-hsps-in-puntius-sophore
#5
Arabinda Mahanty, Sasmita Mohanty, Bimal P Mohanty
Heat stress is one of the major environmental concerns in global warming regime and rising temperature has resulted in mass mortalities of animals including fishes. Therefore, strategies for high temperature stress tolerance and ameliorating the effects of heat stress are being looked for. In an earlier study, we reported that Nrf-2 (nuclear factor E2-related factor 2) mediated upregulation of antioxidative enzymes and heat shock proteins (Hsps) provide survivability to fish under heat stress. In this study, we have evaluated the ameliorative potential of dietary curcumin, a potential Nrf-2 inducer in heat stressed cyprinid Puntius sophore...
March 17, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28315161/the-effect-of-live-feeds-bathed-with-the-red-seaweed-asparagopsis-armata-on-the-survival-growth-and-physiology-status-of-sparus-aurata-larvae
#6
S Castanho, G Califano, F Soares, R Costa, L Mata, P Pousão-Ferreira, L Ribeiro
Larval rearing is affected by a wide range of microorganisms that thrive in larviculture systems. Some seaweed species have metabolites capable of reducing the bacterial load. However, no studies have yet tested whether including seaweed metabolites on larval rearing systems has any effects on the larvae development. This work assessed the development of Sparus aurata larvae fed preys treated with an Asparagopsis armata product. Live prey, Brachionus spp. and Artemia sp., were immersed in a solution containing 0...
March 17, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28315160/modulatory-role-of-l-carnitine-against-microcystin-lr-induced-immunotoxicity-and-oxidative-stress-in-common-carp
#7
Xiu-Mei Chen, Gui-Liang Guo, Li Sun, Qiu-Shi Yang, Gui-Qin Wang, Dong-Ming Zhang
Microcystin-LR (MCLR), one of the most popular microcystins (MCs) found in many field water bodies around the world, poses great health risks to animals and humans. In the present study, healthy common carp (initial weight 24.8 ± 2.3 g) were randomly assigned to five groups. Group I was fed on normal diet as control. Group II was maintained on normal diet and received MCLR intraperitoneal injection (150 μg kg(-1) BW). Common carp in groups III, IV, and V were daily pretreated with L-carnitine (LC) at doses of 0...
March 17, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28293862/hemolysis-interference-in-measuring-fish-plasma-biochemical-indicators
#8
Ali Taheri Mirghaed, Melika Ghelichpour, Seyyed Morteza Hoseini, Kourosh Amini
The present study aimed to determine hemolysis interference in measurement of plasma biochemical parameters in fish specimens. For this purpose, blood samples were harvested from 24 Huso huso juveniles. After centrifugation, each plasma sample was divided into seven portions to make seven levels of hemolysis. Hemolysis was induced by addition of different percentages of the corresponding whole blood [0 (non-hemolyzed control group), 1, 3, 5, 10, 15, and 20% of whole blood]. Albumin, total protein, calcium, phosphorus, glucose, sodium, potassium, chloride, alkaline phosphatase (ALP), aspartate transaminase (AST), and alanine transaminase (ALT) were measured in different samples...
March 14, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28293861/identification-and-characterization-of-micrornas-in-the-muscle-of-schizothorax-prenanti
#9
Runfeng Zhang, Ruiwen Li, Yaqiu Lin
MicroRNAs (miRNAs) regulate gene expression by fully or partially binding to complementary sequences and play important roles in skeletal muscle development. However, the roles of miRNAs in the skeletal muscle of Schizothorax prenanti remain unknown. In this study, we analyzed the miRNA profiling in the skeletal muscle of S. prenanti at 30 days post-hatching (dph), 1 year, and 3 years by high-throughput sequencing. Two hundred twenty-nine unique miRNA types aligned to 201 independent pre-miRNA loci according to sequence similarity and 28 novel miRNAs were obtained...
March 14, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28293860/tissue-specific-daily-variation-in-the-oxidative-status-of-sturgeon-acipenser-naccarii-and-rainbow-trout-oncorhynchus-mykiss-a-comparative-study
#10
M C Hidalgo, C E Trenzado, M Furné, A Beltrán, C Manzaneda, M García-Gallego, A Domezain, A Sanz
The oxidative status is associated with animal lifespan, metabolism, activity and circadian rhythms. The objective of this work is to study the time course of the oxidative status over a daily cycle in the plasma, liver and brain, and the changes in the plasma cortisol levels of sturgeon and trout. The knowledge of daily oxidative status will provide a better understanding of the trout and sturgeon physiology and adequate maintenance and food supply of farmed fish in relation to photoperiod. Superoxide dismutase, catalase, glutathione peroxidase, glutathione reductase, glutathione transferase, DT-diaphorase activities, lipid peroxidation and cortisol were measured...
March 14, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28285354/endocrine-disruption-oxidative-stress-and-testicular-damage-induced-by-4-nonylphenol-in-clarias-gariepinus-the-protective-role-of-cydonia-oblonga
#11
Alaa El-Din H Sayed, Rania F K Ismail
Exposure to xenoestrogens like 4-nonylphenol (NP) is recognized by disrupting endocrine functions and causes reproductive dysfunction in male fish. The present study aimed at investigating the 4-nonylphenol propensity to induce oxidative stress and hormonal disturbances in male catfish and at studying the protective role of quince (Cydonia oblonga). To fulfill this aim, catfish Clarias gariepinus were exposed to pure 100 μg/L 4-NP and to quince the leaf extract added to 4-NP, both for 15 days. The 4-NP exposure induced a marked increase in 17ß-estradiol (E2), LH, and cortisol, while thyroid hormone (TSH, T3), testosterone (T), and FSH levels noticeably decreased; however, 4-NP had no effect on T4 level...
March 11, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28280952/involvement-of-the-mir-462-731-cluster-in-hypoxia-response-in-megalobrama-amblycephala
#12
Cui-Hong Huang, Nan Chen, Chun-Xiao Huang, Bao Zhang, Meng Wu, Lei He, Hong Liu, Rong Tang, Wei-Min Wang, Huan-Ling Wang
MicroRNAs (miRNAs) are non-coding small RNAs showing both evolutionarily conserved and unique features and are involved in nearly all biological processes. In the present study, the role played by miR-462/731 cluster miRNAs in hypoxia response in Megalobrama amblycephala, an important freshwater fish, was investigated. The M. amblycephala miR-462/731 cluster locus and their 5' flanking sequences were sequenced and analyzed. In M. amblycephala and other teleost fish species, the mature sequences of miR-462 and miR-731 were identical and hypoxia-responsive elements (HREs) were identified upstream of the miR-462/731 loci...
March 9, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28280951/effects-of-dietary-n-3-fatty-acids-on-toll-like-receptor-activation-in-primary-leucocytes-from-atlantic-salmon-salmo-salar
#13
Marianne Arnemo, Arturas Kavaliauskis, Adriana Magalhaes Santos Andresen, Marta Bou, Gerd Marit Berge, Bente Ruyter, Tor Gjøen
The shortage of the n-3 fatty acids eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on the international markets has led to increasing substitution of fish oil by plant oils in Atlantic salmon (Salmo salar) feed and thereby reducing the EPA and DHA content in salmon. However, the minimum required levels of these fatty acids in fish diets for securing fish health are unknown. Fish were fed with 0, 1 or 2% EPA or DHA alone or in combination of both over a period, growing from 50 to 400 g. Primary head kidney leucocytes were isolated and stimulated with Toll-like receptor (TLR) ligands to determine if EPA and DHA deficiency can affect expression of important immune genes and eicosanoid production...
March 9, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28247155/purification-and-development-of-elisas-for-two-forms-of-vitellogenin-in-indian-walking-catfish-clarias-batrachus-l
#14
S Mahapatra, Sk Kabita, D Bhattacharya, S Sarkar, S K Juin, S Maitra, P Nath
Two forms of vitellogenin (Vg: Vg1 and Vg2) were purified from the plasma of estradiol-17β (E2)-treated Indian walking catfish, Clarias batrachus, by gel filtration and adsorption chromatography. Native Vg1 and Vg2 had apparent molecular masses of 375 and 450 kDa, respectively, and both Vgs resolved into two similar major bands (95 and 67 kDa) in SDS-PAGE under reducing condition. Polyclonal antisera raised against each form of Vg were absorbed with a combination of hypophysectomized male catfish serum proteins and alternate Vg to ensure specificity...
February 28, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28243861/potential-contributions-of-heat-shock-proteins-and-related-genes-in-sexual-differentiation-in-yellow-catfish-pelteobagrus-fulvidraco
#15
Yan He, Jie Fang, Liyao Xue, Junjie Wu, Farman Ullah Dawar, Jie Mei
Sex determination and differentiation in ectotherms are very complicated affairs and usually affected by both genetic and environmental factors. Because of their temperature-sensitive expression, heat shock proteins (HSPs) are good candidates for temperature-dependent sex determination (TSD). Similar to most thermosensitive fish species, the male to female ratio increases with temperature in yellow catfish (Pelteobagrus fulvidraco). Yellow catfish is also a type of sexual size dimorphic fish, and the male individuals grow much faster than females of the same age...
February 28, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28236008/molecular-cloning-and-expression-analysis-of-megalobrama-amblycephala-transferrin-gene-and-effects-of-exposure-to-iron-and-infection-with-aeromonas-hydrophila
#16
Tao Teng, Bingwen Xi, Jun Xie, Kai Chen, Pao Xu, Liangkun Pan
Transferrin (Tf) plays an important function in iron homeostasis and metabolism of organisms. In this study, we identified and characterized the Tf gene in Megalobrama amblycephala and evaluated its expression in basal conditions as well as after iron overload and experimental infection with Aeromonas hydrophila. Furthermore, we studied the iron binding properties of recombinant Tf. The full-length M. amblycephala Tf complementary DNA (cDNA) (GenBank accession no.: KX698308) of 2245 bp was cloned and contained a 1953 bp open reading frame (ORF) encoding 650 amino acid residues and flanked by a 68 bp 5' and a 204 bp 3' untranslated regions (UTR)...
February 24, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28197868/plasma-levels-of-immune-factors-and-sex-steroids-in-the-male-seahorse-hippocampus-erectus-during-a-breeding-cycle
#17
Tingting Lin, Xin Liu, Dongxue Xiao, Dong Zhang
To better understand the endocrine- and immune-response pattern during reproduction in a fish species having parental care behaviors and also to accumulate the endocrine- and immune-related data for future explanations of the low reproductive efficiency in seahorse species, the variations of immune factors and sex steroids in the plasma of the male lined seahorse Hippocampus erectus at different breeding stages, i.e., pre-pregnancy, pregnancy (early, middle, and late periods), and post-pregnancy, were investigated in the present study...
February 14, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28197867/ultramorphological-changes-in-gill-rakers-of-astyanax-altiparanae-characidae-kept-in-contaminated-environments
#18
F P Lopes, B F Pereira, R M S Alves, J R T Valim, F A T Figueiredo, D L Pitol, F H Caetano
Most water bodies in Brazil, and in the world, are contaminated by some types of pollutants, ranging from sewage to metal/chemicals, carcinogenic products, and biodegradable detergents. Despite the extensive knowledge on their effects on fish biology and especially on gill morphology, research that concerns their impacts on gill rakers and implications in parameters such as food consumption cannot be found in the literature. Gill rakers are vital because, together with gills, they are responsible for the defense and protection of the organism and for selecting appropriate food for survival...
February 14, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28160132/the-effects-of-surgically-implanted-dummy-tags-on-the-survival-growth-performance-and-physiology-of-pikeperch-sander-lucioperca
#19
Maciej Rożyński, Andrzej Kapusta, Krystyna Demska-Zakęś, Marek Hopko, Agnieszka Sikora, Zdzisław Zakęś
The aim of this work was to determine the impact of surgically implanted telemetry transmitters (TTs) on the growth, survival, hematological and biochemical indexes, and wound healing in juvenile pikeperch (Sander lucioperca) (body weight 60-90 g). Two incision suturing methods were used-silk sutures (experiment I-group ST) or tissue adhesive (experiment II-group GT). After tagging, the fish were held in a recirculating system for 35 days. No statistically significant differences were noted in the growth or condition indexes analyzed among the fish tagged with TT compared with those from the control groups (untagged)...
February 3, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28130733/preventive-and-reparative-effects-of-isoleucine-against-copper-induced-oxidative-damage-in-primary-fish-enterocytes
#20
Juan Zhao, Pei Wu, Weidan Jiang, Yang Liu, Jun Jiang, Yongan Zhang, Xiaoqiu Zhou, Lin Feng
The present study aimed to assess the possible preventive and reparative effects of isoleucine (Ile) against copper (Cu)-induced oxidative stress in fish enterocytes in vitro. In experiment 1, enterocytes were preincubated with increasing concentrations of Ile (0, 50, 120, 190, 260, and 330 mg L(-1)) for 72 h followed by exposure to 6 mg L(-1) Cu for 24 h. In experiment 2, the enterocytes were pretreated with 6 mg L(-1) Cu for 24 h and then treated with 0-330 mg L(-1) Ile for 72 h to investigate its potential reparative role...
January 28, 2017: Fish Physiology and Biochemistry
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