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Fish Physiology and Biochemistry

Jie Yu, Yuanshuai Fu, Suping Liu, Zhiyi Shi
Thyroid hormone (TH) is essential for Paralichthys olivaceus metamorphosis. Exogenous TH treatment induces premature metamorphosis in P. olivaceus larvae and a series of studies have been conducted to identify thyroid hormone-regulated functional genes and microRNAs involved in the metamorphosis of P. olivaceus; however, the proteins involved in this process remain to be fully clarified. In this study, the differential proteomic responses of P. olivaceus larvae to exogenous TH treatment were examined using tandem mass tags (TMT) for quantitation labeling followed by liquid chromatography tandem mass spectrometry (LC-MS/MS)...
September 21, 2018: Fish Physiology and Biochemistry
Yan Bai, Chengdong Liu, Jianfeng Zhou, Xiaozhi Rong, Hongying Wang
Ror family of receptor tyrosine kinases ROR1 and ROR2 plays crucial roles in animal development by regulating cell proliferation, differentiation, and migration, as well as survival and death by acting as a receptor or co-receptor for Wnt5a and mediating Wnt5a-induced activation. Compared with our extensive understanding of ROR2, our knowledge of ROR1 is limited. In this study, we characterized the zebrafish ror1 gene and determined its temporal and spatial expression and biological activity. Sequence comparison and phylogenetic analyses indicate that its protein structure is similar to its mammalian orthologs...
September 21, 2018: Fish Physiology and Biochemistry
Rong-Rong Ma, Jing Sun, Wen-Hong Fang, Ya-Ping Dong, Ji-Ming Ruan, Xian-Le Yang, Kun Hu
The γ-aminobutyric acid type A (GABAA ) receptor is an important pentameric inhibitory neurotransmitter receptor, and the γ2 subunit of this receptor plays a key role in potentiation of the GABAA response. We previously detected that the expression of GABAA receptor in the livers of Carassius auratus gibelio significantly increased after medication (avermectin and difloxacin treatment). In order to better understand the mechanism of action of the GABAA receptor γ2 subunit in the livers of C. auratus gibelio, we constructed a C...
September 21, 2018: Fish Physiology and Biochemistry
Ji Shu Zhou, Pan Guo, Hai Bo Yu, Hong Ji, Zhou Wen Lai, Yi An Chen
Sodium butyrate (SB) can be coated with fatty acid matrix. In this study, the effects of three SB forms, being zero-lipid-coated (SB-A), half-lipid-coated (SB-B), and 2/3 lipid-coated (SB-C) (w/w), on growth, lipid metabolism, and health status of grass carp (Ctenopharyngodon idella) were investigated. The three forms of SB were added to a control diet to form three SB diets, Con., SB-A, SB-B, and SB-C, where the pure SB in each SB diet was kept at the same level (500 mg kg-1 ). A total of 216 C. idella (14...
September 20, 2018: Fish Physiology and Biochemistry
Viktoriia Iegorova, Milos Havelka, Martin Psenicka, Taiju Saito
Polyspermy is the most commonly observed cause of embryonic abnormalities in fertilization, often resulting in death. In sterlet (Acipenser ruthenus), however, polyspermic embryos have high survival (similar to a control group) and morphological development is similar to monospermic larvae. Ploidy of these individuals is n/2n mosaic (whereas the normal state for A. ruthenus is a functional diploid). This study was undertaken to test whether sturgeon eggs can be fertilized by several spermatozoa from different species to produce viable offspring from three interspecific parents: A...
September 19, 2018: Fish Physiology and Biochemistry
Bin Wang, Yongjiang Xu, Xuezhou Liu, Quan Liu, Yongshan Liu, Yaxing Zhang, Bao Shi
In this study, to understand the role of the insulin-like growth factor (IGF) system in the regulation of early development in yellowtail kingfish (YTK, Seriola lalandi), an economically important marine fish species with a high potential for aquaculture, we first cloned the full-length cDNAs for igf1 and igf2 from the liver. YTK igf1 cDNA was 1946 base pairs (bp) in length with an open reading frame (ORF) of 558 bp encoding preproIGF1 of 185 amino acids (aa). The preproIGF1 consisted of 44 aa for the signal peptide, 68 aa for the mature peptide comprising B, C, A, and D domains, and 73 aa for the E domain...
September 17, 2018: Fish Physiology and Biochemistry
Guang-Zhen Jiang, Hua-Juan Shi, Chao Xu, Ding-Dong Zhang, Wen-Bin Liu, Xiang-Fei Li
This study aimed to characterize the full-length cDNA of glucose-6-phosphate dehydrogenase (G6PD) from Megalobrama amblycephala with its responses to dietary carbohydrate levels characterized. The cDNA obtained covered 2768 bp with an open reading frame of 1572 bp. Sequence alignment and phylogenetic analysis revealed a high degree of conservation (77-97%) among most fish and other higher vertebrates. The highest transcription of G6PD was observed in kidney followed by liver, whereas relatively low abundance was detected in eye...
September 17, 2018: Fish Physiology and Biochemistry
Xinru Li, Tao Wang, Shaowu Yin, Guosong Zhang, Quanquan Cao, Xin Wen, Hongye Zhang, Dan Wang, Wenxu Zhu
Hypoxia frequently occurs in aquatic ecosystem, which is influenced by salinity, water temperature, weather, and surface water runoff. In order to shed further light on the evolutionary and adaptive mechanisms in fish under hypoxic condition, the impact of acute hypoxia (1.63 ± 0.2 mg/L) and reoxygenation (7.0 ± 0.3 mg/L) on oxygen sensors, energy metabolism, and hematological indices was evaluated in Takifugu fasciatus. Data from transcriptional level analysis show that the expressions of genes related to oxygen sensors (HIF-1α, PHD2, and VHL) were upregulated in the brain and liver under hypoxia and recovered under reoxygenation...
September 17, 2018: Fish Physiology and Biochemistry
Momin Momin, Devrim Memiş
Sperm quality parameters in rainbow trout (Oncorhynchus mykiss) were investigated during normal season spawning (November-January) and out-season spawning (July-August) treated with artificial photoperiod manipulation. Normal spawning males (n = 15) were kept in an open concrete pond under natural condition. Out-season spawning males (n = 15) were treated with artificial LED light (50 lm/m2 ) in a closed concrete pond. In these two experimental groups, five fish were used in each of three spawning periods...
September 7, 2018: Fish Physiology and Biochemistry
Sinlapachai Senarat, Jes Kettratad, Niwat Kangwanrangsan, Wannee Jiraungkoorskul, Masafumi Amano, Akio Shimizu, F Gerald Plumley, Sasipong Tipdomrongpong
The published online version of this article contained outdated Figs. 4 and 5. The original article has been corrected.
September 5, 2018: Fish Physiology and Biochemistry
Katayoon Nofouzi, Najmeh Sheikhzadeh, Hossein Varshoie, Sona Khadir Sharabyani, Mehran Jafarnezhad, Sadigheh Shabanzadeh, Ehsan Ahmadifar, John Stanford, Amir Ali Shahbazfar
Present study was conducted to investigate the effects of heat-killed Tsukamurella inchonensis on growth performance, gastrointestinal structure, immune response, and biochemical parameters in rainbow trout. Fish (mean weight 25 g) were fed basal diet (control), diets containing 2.48 × 108 colony-forming units (low-dose group) or 1.24 × 109 colony-forming units (high-dose group) of heat-killed Tsukamurella inchonensis per 1 kg of feed for 90 days. Results showed that growth performance was significantly enhanced in both treatment groups compared to the control group...
September 3, 2018: Fish Physiology and Biochemistry
Wenjie Xu, Junyan Jin, Dong Han, Haokun Liu, Xiaoming Zhu, Yunxia Yang, Shouqi Xie
The present study investigated differences in the utilization of fishmeal (FM) and rapeseed meal (RM) by gibel carp (Carassius gibelio) and explored the effects of protein sources on the responses of different genotypes. Gibel carp strains A (4.12 ± 0.03 g) and F (3.47 ± 0.00 g) were fed FM diet or RM diet for 56 days, and after which, growth performance, body composition, hematologic indices, and hepatic transcriptomes were measured. The effects of strain and diet on growth performance, body composition, and hematologic indices were analyzed by two-way analysis of covariance (ANCOVA)...
August 31, 2018: Fish Physiology and Biochemistry
Jinxing Du, Xiaowen Chen, Jun Wang, Honglin Chen, Wucheng Yue, Guoqing Lu, Chenghui Wang
Body color variation has long been a hot research topic in evolutionary and functional biology. Oujiang color common carp (Cyprinus carpio var. color) is a well-known economical and ornamental fish. Three main types of pigments and four distinct color patterns are typical characters of Oujiang color common carp, which makes it an excellent fish model to study body coloration. In this study, skin transcriptome assembly and comparisons were conducted in two Oujiang color common carp varieties: whole red and whole white...
August 24, 2018: Fish Physiology and Biochemistry
Paula Suzanna Prado, Ana Paula Barbosa Pinheiro, André Alberto Weber, Nilo Bazzoli, Elizete Rizzo
The insulin-like growth factor (IGF) system plays important roles in fish reproduction, but the expression pattern and cellular location of IGF-I and IGF-II during gonadal maturation are uncertain. The present study reports a stage-specific assessment of gonadal expression levels and immunolocalisation of IGF-I and IGF-II in Astyanax fasciatus, a characid fish from South America. Adult fish in different maturity stages were caught in the Furnas Reservoir, Grande River, Brazil. Gonad samples were processed for histology, immunohistochemistry, and ELISA for IGF-I and IGF-II...
August 24, 2018: Fish Physiology and Biochemistry
Xiang-Yang Yuan, Guang-Zhen Jiang, Cong-Cong Wang, Kenneth Prudence Abasubong, Qing Zou, Yu-Yan Zhou, Wen-Bin Liu
This study aimed to evaluate the effects of fish meal (FM) replacement by yeast hydrolysate (YH) on liver antioxidant capability, intestinal morphology, and inflammation-related genes of juvenile Jian carp (Cyprinus carpio var. Jian). A total of 600 fish (average initial weight 19.44 ± 0.06 g) were randomly selected and divided into five groups. Five isonitrogenous and isocaloric diets replacing FM by YH 0% (YH0), 1% (YH1), 3% (YH3), 5% (YH5), and 7% (YH7) were formulated. Each diet was tested in four replicates for 10 weeks...
August 24, 2018: Fish Physiology and Biochemistry
Mahmoud A O Dawood, Shunsuke Koshio, Amr I Zaineldin, Hien Van Doan, Eman Moustafa Moustafa, Mohamed M Abdel-Daim, M Angeles Esteban, Mohamed S Hassaan
Dietary supplementation of selenium nanoparticles (Se-NPs) at different levels (0, 0.5, 1, and 2 mg kg-1 diet) was evaluated to find out the effects on serum and skin immune responses as well as stress resistance in the red sea bream (Pagrus major). After 45 days of experimental trial, serum and mucosal immune responses were significantly high in fish fed 1 mg Se-NPs kg-1 diet (P < 0.05). In this group, alternative complement pathway, total serum protein, antioxidant activity of catalase enzyme, serum bactericidal activity, serum lysozyme activity, and amounts of skin mucus secretions as well as stress resistance against low salinity stress increased significantly, when compared to fish fed Se-NP-free diet (P < 0...
August 24, 2018: Fish Physiology and Biochemistry
Rubén Bermejo-Poza, Montserrat Fernández-Muela, Jesús De la Fuente, Concepción Pérez, Elisabet González de Chavarri, María Teresa Díaz, Fernando Torrent, Morris Villarroel
Fish normally undergo periods of food deprivation that are longer than non-hibernating mammals. In aquacultured rainbow trout (Oncorhynchus mykiss), it is unclear how fasting may affect their physiological adaptative response, especially when they are normally fed daily. In addition, that response may vary with temperature, making it necessary to express fasting duration in terms of degree days. In the current study, trout were fasted for 5, 10, and 20 days (55, 107, and 200 degree days (°C d), respectively)...
August 23, 2018: Fish Physiology and Biochemistry
Ahmed Maouche, Edouard Curran, Anne-Sophie Goupil, Elisabeth Sambroni, Johanna Bellaiche, Florence Le Gac, Jean-Jacques Lareyre
The present study aimed to investigate whether the Gfra1/Gdnf and/or Kit/Kitlg regulatory pathways could be involved in the regulation of spermatogonial cell proliferation and/or differentiation in fish. Homologs of the mammalian gfra1, gdnf, kitr, and kitlg genes were identified in gnathostomes and reliable orthologous relationships were established using phylogenetic reconstructions and analyses of syntenic chromosomal fragments. Gene duplications and losses occurred specifically in teleost fish and members of the Salmoninae family including rainbow trout (Oncorhynchus mykiss) and Atlantic salmon (Salmo salar)...
August 18, 2018: Fish Physiology and Biochemistry
Carine de Freitas Souza, Sharine Descovi, Matheus Dellaméa Baldissera, Kalyne Bertolin, Adriane Erbice Bianchini, Rosa Helena Veraz Mourão, Denise Schmidt, Berta Maria Heinzmann, Alfredo Antoniazzi, Bernardo Baldisserotto, Gonzalo Martinez-Rodríguez
In teleost fish, stress initiates a hormone cascade along the hypothalamus-pituitary-interrenal (HPI) axis to provoke several physiological reactions in order to maintain homeostasis. In aquaculture, a number of factors induce stress in fish, such as handling and transport, and in order to reduce the consequences of this, the use of anesthetics has been an interesting alternative. Essential oil (EO) of Lippia alba is considered to be a good anesthetic; however, its distinct chemotypes have different side effects...
August 17, 2018: Fish Physiology and Biochemistry
Marco Parolini, Rocco Iacobuzio, Beatrice De Felice, Bruno Bassano, Roberta Pennati, Nicola Saino
Oxidative stress is defined as the imbalance between pro-oxidant and antioxidant molecules in favor of the former and it represents one of the main driving forces of aging. To counteract the harmful effects of oxidative stress, organisms evolved a complex antioxidant system. According to the free radical theory of aging, while the production of reactive oxygen species (ROS) increases with age, the antioxidant defenses decline. Although this relationship has been investigated in diverse vertebrate taxa, the information in fish is scant and inconsistent, particularly for wild populations...
August 14, 2018: Fish Physiology and Biochemistry
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