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Fish Physiology and Biochemistry

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https://www.readbyqxmd.com/read/29340879/diethylstilbestrol-arrested-spermatogenesis-and-somatic-growth-in-the-juveniles-of-yellow-catfish-pelteobagrus-fulvidraco-a-fish-with-sexual-dimorphic-growth
#1
Zhi-Hao Liu, Qi-Liang Chen, Qiang Chen, Fang Li, Ying-Wen Li
In fish, spermatogenesis and somatic growth are mainly regulated by hypothalamic-pituitary-gonadal (HPG) and hypothalamic-pituitary-somatic (HPS) axes, respectively. Xenoestrogens have been reported to impair spermatogenesis in some fishes, and arrest somatic growth in some others, whereas, whether xenoestrogens are capable of disrupting spermatogenesis and somatic growth simultaneously in fish that exhibits sexual dimorphic growth is little known, and the underlying mechanisms remain poorly understood. In this study, male juveniles of yellow catfish (Pelteobagrus fulvidraco), which exhibits a sexual dimorphic growth that favors males, were exposed to diethylstilbestrol (DES) for 28 days...
January 16, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29327317/transcript-levels-of-members-of-the-slc2-and-slc5-families-of-glucose-transport-proteins-in-eel-swimbladder-tissue-the-influence-of-silvering-and-the-influence-of-a-nematode-infection
#2
Gabriel Schneebauer, David Mauracher, Birgit Fiechtner, Bernd Pelster
The rate of glucose metabolism has been shown to be correlated to glucose uptake in swimbladder gas gland cells. Therefore, it is assumed that in the European eel silvering, i.e., the preparation of the eel for the spawning migration to the Sargasso Sea, coincides with an enhanced capacity for glucose uptake. To test this hypothesis expression of all known glucose transport proteins has been assessed at the transcript level in yellow and in silver eels, and we also included Anguillicola crassus infected swimbladders...
January 11, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29307115/bioinformatic-analyses-of-zona-pellucida-genes-in-vertebrates-and-their-expression-in-nile-tilapia
#3
Tianli Wu, Yunying Cheng, Zhilong Liu, Wenjing Tao, Shuqing Zheng, Deshou Wang
Zona pellucida (ZP) genes encode ZP glycoproteins which constitute the coat surrounding oocytes and early embryos. Genome-wide identification of ZP genes is still lacking in vertebrates, especially in fish species. Herein, we conducted bioinformatic analyses of the ZP genes of the Nile tilapia and other vertebrates. Totally 16, 9, 17, 27, 21, 20, 26, 19, 14,11, 24, 17, 9, 18, 8, 11, 9, 8, 5, and 4 ZP genes belonging to 5 subfamilies (ZPA, ZPB, ZPC, ZPD, and ZPAX) were found in the sea lamprey, elephant shark, coelacanth, spotted gar, zebrafish, medaka, stickleback, Nile tilapia, Amazon molly, platyfish, seahorse, Northern snakehead, cavefish, tetraodon, clawed frog, turtle, chicken, platypus, kangaroo rat, and human genomes, respectively...
January 6, 2018: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29290067/duplication-and-gene-expression-patterns-of-%C3%AE-catenin-in-nile-tilapia
#4
Fengrui Wu, Limin Wu, Qingqing Wu, Linyan Zhou, Wenyong Li, Deshou Wang
β-Catenin, a key transcriptional coactivator of the Wnt pathway, plays an important role in animal embryonic development and organogenesis. In our earlier study, we have reported that two types of β-catenin (β-catenin-1 and β-catenin-2) were ubiquitously expressed in almost all the tissues examined in tilapia. However, the immunolocalization of β-catenin in those tissues, especially in extra-gonadal tissues, remains unclear. In the present study, we further confirm that these two types of β-catenin gene exist only in teleosts and are derived from 3R (third round of genome duplication) by phylogenetic and syntenic analyses...
December 30, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29285672/stimulatory-effect-of-dietary-taurine-on-growth-performance-digestive-enzymes-activity-antioxidant-capacity-and-tolerance-of-common-carp-cyprinus-carpio-l-fry-to-salinity-stress
#5
Mohsen Abdel-Tawwab, Mohamed N Monier
The present study was carried out to evaluate the effect of dietary taurine (Tau) on performance, digestive enzymes, antioxidant activity, and resistance of common carp, Cyprinus carpio L., fry to salinity stress. Fish (0.97 ± 0.033 g) were fed on different taurine levels of 0.0 (control), 5, 10, 15, or 20 g/kg diet up to satiation twice daily for 8 weeks. At the end of the feeding trial, fish were stressed by exposure to 10 ppt salinity for 3 days during which fish mortality was observed. Fish performance was significantly (P < 0...
December 28, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29275437/gene-expression-of-thyrotropin-and-corticotrophin-releasing-hormones-is-regulated-by-environmental-salinity-in-the-euryhaline-teleost-sparus-aurata
#6
Ignacio Ruiz-Jarabo, J A Martos-Sitcha, C Barragán-Méndez, G Martínez-Rodríguez, J M Mancera, F J Arjona
In euryhaline teleosts, the hypothalamus-pituitary-thyroid and hypothalamus-pituitary-interrenal axes (HPT and HPI, respectively) are regulated in response to environmental stimuli such as salinity changes. However, the molecular players participating in this physiological process in the gilthead seabream (Sparus aurata), a species of high value for aquaculture, are still not identified and/or fully characterized in terms of gene expression regulation. In this sense, this study identifies and isolates the thyrotropin-releasing hormone (trh) mRNA sequence from S...
December 23, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29270704/alterations-in-the-activity-of-certain-enzymes-in-the-gills-of-a-carp-labeo-rohita-exposed-to-an-azo-dye-eriochrome-black-t-a-biochemical-investigation
#7
Ayan Srivastava, Usha Kumari, Ashwini Kumar Nigam, Swati Mittal, Ajay Kumar Mittal
In Labeo rohita exposed to sub-lethal concentrations of an azo dye, Eriochrome black T for 4 days, gills show considerable alterations in the activity of certain metabolic enzymes-alkaline phosphatase, acid phosphatase, carboxylesterase, lactate dehydrogenase, and succinate dehydrogenase; and antioxidant enzymes-catalase and peroxidase. The activities of alkaline phosphatase, acid phosphatase, carboxylesterase, succinate dehydrogenase, catalase, and peroxidase decline significantly. This has been associated with impaired metabolic function of the gills due to azo dye toxicity...
December 22, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29255942/effects-of-long-term-feed-deprivation-on-body-weight-loss-muscle-composition-plasma-metabolites-and-intermediate-metabolism-of-meagre-argyrosomus-regius-under-different-water-temperatures
#8
Stavros Chatzifotis, Sofia Clavero, Christiana Kounna, Alexandros Soumalevris, Konstantinos Feidantsis, Efthimia Antonopoulou
The effect of feed deprivation at four water temperatures (17, 20, 23, 26 °C) was investigated in meagre (Argyrosomus regius) of initial mean weight ± SD, 116.16 ± 4.74 g, in triplicate groups. Fish were deprived of feed for a period of 60 days and sampled on days 0, 14, 41, and 60, during which body weight, specific growth rate, somatic indices, muscle proximate composition, plasma metabolite levels (total lipids, proteins, cholesterol, triglycerides, glucose), and liver and muscle enzymatic activities [L-lactate dehydrogenase (L-LDH), citrate synthase (CS), malate dehydrogenase (MDH)] were evaluated...
December 19, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29238889/immunomodulatory-effects-of-rhodomyrtus-tomentosa-leaf-extract-and-its-derivative-compound-rhodomyrtone-on-head-kidney-macrophages-of-rainbow-trout-oncorhynchus-mykiss
#9
Pinanong Na-Phatthalung, Mariana Teles, Supayang Piyawan Voravuthikunchai, Lluís Tort, Camino Fierro-Castro
Rhodomyrtus tomentosa is a medicinal plant that shows biological effects including immunomodulatory activity on human and other mammals but not in fish. In this study, we evaluated the in vitro immunomodulatory effects of R. tomentosa leaf extract and its active compound, rhodomyrtone, on the immune responses, using rainbow trout (Oncorhynchus mykiss) head kidney (HK) macrophages as a model. The tested immune functions included the expression of genes involved in innate immune and inflammatory responses and the production of reactive oxygen species (ROS)...
December 13, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29234908/characterization-of-type-iv-antifreeze-gene-in-nile-tilapia-oreochromis-niloticus-and-influence-of-cold-and-hot-weather-on-its-expression-and-some-immune-related-genes
#10
Asmma Y Ammar, Abeer F El Nahas, Shawky Mahmoud, Mohamed E Barakat, Asmaa M Hassan
The aim of this work is to study the effect of the thermal stress of ambient temperature during winter and summer on the expression of type IV antifreeze gene (ANF IV) in different tissues of Nile tilapia (Oreochromis niloticus) as well as some immune-related genes. At first, genomic ANF IV gene was characterized from one fish; 124 amino acids were identified with 92.7% similarity with that on the gene bank. Expression of ANF IV and immune-related genes were done twice, once at the end of December (winter sample, temperature 14 °C) and the other at August (summer sample, temperature 36 °C)...
December 12, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29230594/molecular-evolution-of-myoglobin-in-the-tibetan-plateau-endemic-schizothoracine-fish-cyprinidae-teleostei-and-tissue-specific-expression-changes-under-hypoxia
#11
Delin Qi, Yan Chao, Yongli Zhao, Mingzhe Xia, Rongrong Wu
Myoglobin (Mb) is an oxygen-binding hemoprotein that was once thought to be exclusively expressed in oxidative myocytes of skeletal and cardiac muscle where it serves in oxygen storage and facilitates intracellular oxygen diffusion. In this study, we cloned the coding sequence of the Mb gene from four species, representing three groups, of the schizothoracine fish endemic to the Qinghai-Tibetan Plateau (QTP), then conducted molecular evolution analyses. We also investigated tissue expression patterns of Mb and the expression response to moderate and severe hypoxia at the mRNA and protein levels in a representative of the highly specialized schizothoracine fish species, Schizopygopsis pylzovi...
December 11, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29230593/effects-of-alpha-ketoglutarate-akg-on-growth-performance-and-non-specific-immunity-of-juvenile-red-drum-fed-diets-with-low-or-adequate-phosphorus-levels
#12
Qiyou Xu, Delbert M Gatlin
This study evaluated the effects of α-ketoglutarate (AKG) on the growth performance, body, and skeletal composition, as well as non-specific immunity of juvenile red drum (Sciaenops ocellatus) fed adequate or low-phosphorus diets. A 2 × 2 factorial design was arranged with two levels of total phosphorus (1.0 or 1.6%) and two levels (0 or 1%) of AKG. Each diet was fed to red drum in four replicate 110-L aquaria (15 fish/aquarium) twice daily for 7 weeks. The results indicated that the low-P diets significantly (P < 0...
December 11, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29224125/substitution-of-soybean-meal-with-fermented-jatropha-kernel-meal-effect-on-growth-performance-body-composition-and-metabolic-enzyme-activity-of-labeo-rohita
#13
Vikas Phulia, Parimal Sardar, Narottam Prasad Sahu, Femi John Fawole, N Shamna, Subodh Gupta
A 60-day feeding trial was conducted to evaluate the nutritional potential of fermented Jatropha kernel meal (FJKM) in the diets of rohu, Labeo rohita, fingerlings. Four iso-nitrogenous (336 g kg-1) and iso-energetic (20 MJ kg-1) diets containing 0, 100, 200, and 300 g kg-1 FJKM in replacement of 0, 33.3, 66.7, and 100% soybean meal protein, respectively, were prepared and designated as control, T1, T2, and T3, respectively. A total of 180 acclimatized fish (average weight 6.05 ± 0.04 g) were equally distributed into four experimental groups in triplicates, and were fed their respective diets to satiation twice daily at 10:00 h and 18:00 h...
December 9, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29218440/biochemical-properties-of-the-sensitivity-to-gabaaergic-ligands-cl-hco3-atpase-isolated-from-fish-cyprinus-carpio-olfactory-mucosa-and-brain
#14
Sergey Menzikov
This paper presents a comparative study of the roles of Cl- and HCO3- in the functioning of the GABAAR-associated Cl-/HCO3--ATPase of the plasma membranes of the olfactory sensory neurons (OSNs) and mature brain neurons (MBNs) of fish. The ATPase activity of OSNs and its dephosphorylation were increased twofold by Cl-(15-30 mmol l-1), whereas the enzyme from MBNs was not significantly affected by Cl-. By contrast, HCO3-(15-30 mmol l-1) significantly activated the MBN enzyme and its dephosphorylation, but had no effect on the OSN ATPase...
December 7, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29218439/characterization-and-expression-of-lin-28a-involved-in-lin28-let-7signal-pathway-during-early-development-of-p-olivaceus
#15
Yuanshuai Fu, Lina Gao, Zhiyi Shi, Feng You, Junling Zhang, Wenjuan Li
Heterochronic lin-28 is a conserved RNA-binding protein that plays a key role in the timing of developmental events in organisms. As a crucial heterochronic gene, the protein controls developmental events of the second of four larval stages in Caenorhabditi elegans. Heterochronic let-7 miRNAs are often present in various species and highly conserved in sequence and biological function and are required for various biological processes. Previous studies showed that ten let-7 miRNAs were identified in the Japanese flounder (Paralichthys olivaceus) and that they were primarily expressed during metamorphosis...
December 7, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29214431/establishment-and-characterization-of-a-kidney-cell-line-from-kelp-grouper-epinephelus-moara
#16
Xiao-Feng Liu, Ya-Hong Wu, Shi-Na Wei, Na Wang, Peng-Fei Li, Yang-Zhen Li, Nian-Wei Zhang, Qi-Wei Qin, Song-Lin Chen
A novel cell line, Epinephelus moara kidney cell line (EMK), was established from kidneys of kelp grouper E. moara. Cells were cultured at 24 °C in Leibovitz's L-15 medium (L15) supplemented with antibiotics, basic fibroblast growth factor (bFGF), foetal bovine serum (FBS) and 2-mercaptoethanol (2-ME). EMK cells, fibroblastic in morphology, proliferated to 100% confluency in 3-4 days and were subcultured for over 50 passages. The cells could grow from 18 to 30 °C, with optimal growth at 24 °C. Chromosome analysis indicated that the modal chromosome number was 48 in the cells at passage 42...
December 6, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29197037/respiratory-response-of-grass-carp-ctenopharyngodon-idellus-to-dissolved-oxygen-changes-at-three-acclimation-temperatures
#17
Zhigang Zhao, Shuanglin Dong, Qiyou Xu
Respiratory parameters of grass carp were studied during dissolved oxygen (DO) changes from normal DO to hypoxia, then return to normal DO at 15, 25, and 30 °C acclimation, respectively. The results showed that with increases of acclimation temperature at normoxia the respiratory frequency (fR), oxygen consumption rate (VO2), respiratory stroke volume (VS.R), gill ventilation (VG), and VG/VO2 of grass carp increased significantly, but the oxygen extraction efficiency (EO2) of fish decreased significantly (P < 0...
December 1, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29192359/a-field-and-laboratory-study-of-the-responses-of-cytoprotection-and-osmoregulation-to-salinity-stress-in-mosquitofish-gambusia-affinis
#18
Jeng-Wei Tsai, Hon-Jung Liew, Jyun-Jiang Jhang, Shiou-Han Hung, Pei-Jie Meng, Ming-Yih Leu, Christopher Lim, Cheng-Hao Tang
The mosquitofish (Gambusia affinis) naturally inhabits freshwater (FW; 1-3‰) and seawater (SW; 28-33‰) ponds in constructed wetland. To explore the physiological status and molecular mechanisms for salinity adaptation of the mosquitofish, cytoprotective responses and osmoregulation were examined. In the field study, activation of protein quality control (PQC) mechanism through upregulation of the abundance of heat shock protein (HSP) 90 and 70 and ubiquitin-conjugated proteins was found in the mosquitofish gills from SW pond compared to the individuals of FW pond...
December 1, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29192358/cryopreservation-of-male-and-female-gonial-cells-by-vitrification-in-the-critically-endangered-cyprinid-honmoroko-gnathopogon-caerulescens
#19
Shogo Higaki, Takaaki Todo, Reiko Teshima, Ikuo Tooyama, Yasuhiro Fujioka, Noriyoshi Sakai, Tatsuyuki Takada
We investigated the feasibility of cryopreservation of spermatogonia and oogonia in the critically endangered cyprinid honmoroko Gnathopogon caerulescens using slow-cooling (freezing) and rapid-cooling (vitrification) methods. Initially, we examined the testicular cell toxicities and glass-forming properties of the five cryoprotectants: ethylene glycol (EG), glycerol (GC), dimethyl sulfoxide (DMSO), propylene glycol (PG), and 1,3-butylene glycol (BG), and we determined cryoprotectant concentrations that are suitable for freezing and vitrification solutions, respectively...
November 30, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/29164452/identification-of-suh-gene-and-evidence-for-involvement-of-notch-signaling-pathway-on-gonadal-differentiation-of-yellow-river-carp-cyprinus-carpio
#20
Yongfang Jia, Fang Wang, Ruihua Zhang, Tingting Liang, WanWan Zhang, Xiaolin Ji, Qiyan Du, Zhongjie Chang
The suh gene is crucial in Notch pathway and regulates mammalian gonad development. In this study, the sequences of suh1 and suh2 genes in Yellow River carp (Cyprinus carpio) were verified. The partial 5'-flanking regions of suh1 and suh2 were analyzed and several potential transcription factor-binding sites were identified. Phylogenetic, gene structure, and chromosome synteny analyses revealed that carp suh1 and suh2 were orthologs and homologous to vertebrate suh. Investigation of the expression profiles of suh1 and suh2 with qPCR showed that these genes were abundant in the brain and gonad of carp, with suh1 exhibiting sexual dimorphism expression pattern in gonad...
November 21, 2017: Fish Physiology and Biochemistry
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