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Fish Physiology and Biochemistry

Matheus D Baldissera, Carine F Souza, Carla Cristina Zeppenfeld, Sharine Descovi, Aleksandro S da Silva, Bernardo Baldisserotto
The phosphotransfer network system, through the enzymes creatine kinase (CK), adenylate kinase (AK), and pyruvate kinase (PK), contributes to efficient intracellular energetic communication between cellular adenosine triphosphate (ATP) consumption and production in tissues with high energetic demand, such as cerebral tissue. Thus, the aim of this study was to evaluate whether aflatoxin B1 (AFB1 ) intoxication in diet negatively affects the cerebral phosphotransfer network related to impairment of cerebral ATP levels in silver catfish (Rhamdia quelen)...
March 15, 2018: Fish Physiology and Biochemistry
Ji Yong Choi, Cheol Young Choi
This study was conducted to identify the possible effect of recombinant vertebrate ancient long (VAL) opsin as a non-visual "photoreceptor" in the deep brain of goldfish, Carassius auratus. In addition, we investigated the effects of green-wavelength light on the predictable reproductive function of VAL-opsin as a green-sensitive pigment in the deep brain. To determine this, we quantified changes in gonadotropin hormone (GTH) [GTHα, follicle stimulating hormone (FSH) and luteinizing hormone (LH)] and estrogen receptor (ER; ERα and ERβ) mRNA expression levels associated with goldfish reproduction as well as changes in plasma FSH, LH, and 17β-estradiol (E2 ) activities after injection of recombinant VAL-opsin protein in two concentrations (0...
March 14, 2018: Fish Physiology and Biochemistry
E Kondera, B Teodorczuk, K Ługowska, M Witeska
The effects of Roundup (glyphosate-based herbicide) on peripheral blood parameters and hematopoietic tissue cellular composition and activity in common carp juveniles were evaluated. The fish were exposed for 7 days at 0.0, 0.1, 0.5, or 5.0 mg/L of glyphosate. In fish exposed to Roundup, hematological alterations were observed; however, most of them were not directly related to the herbicide concentration. An increase in Ht and MCV, and decrease in Hb, MCH, and MCHC compared to the control were observed. Fish exposed to Roundup showed also a reduction in WBC and oxidative metabolic activity of phagocytes (NBT) compared to the control...
March 14, 2018: Fish Physiology and Biochemistry
J Das Neves, I E J Barnhoorn, G M Wagenaar
The organochlorine pesticides aldrin (0.14 μg/L) and methoxychlor (0.23 μg/L) were both present in the Albasini Dam, Limpopo Province, South Africa, during a field survey in 2014. The use of aldrin has been banned in the USA since 1987 and restricted in South Africa since 1992. The use of methoxychlor, however, remains undefined with little information available about its registration in South Africa despite being banned in Europe (2002) and USA (2003). The aim of this study was to determine the potential effects of environmentally relevant concentrations of aldrin and methoxychlor on the reproductive system of male catfish, Clarias gariepinus...
March 9, 2018: Fish Physiology and Biochemistry
Mahmoud Abd-Elkareem, Nasser S Abou Khalil, Alaa H Sayed
4-Nonylphenol (NP) toxicity in fish attracts much attention due to its ability in targeting several organs; however, the researches regarding its potential hepatotoxicity are conflicting and still require further investigation. Therefore, the objective of this study is to focus on this issue from the histophysiological point of view using NP intoxicated African catfish (Clarias gariepinus) as a model of hepatotoxicity. Twelve adult fish (6 per group) were divided into two groups; the first was considered as a control and the second was exposed to NP dissolved in water at a dose of 0...
March 7, 2018: Fish Physiology and Biochemistry
Julia Pinedo-Gil, Ana Belén Martín-Diana, Daniela Bertotto, Miguel Ángel Sanz-Calvo, Miguel Jover-Cerdá, Ana Tomás-Vidal
This study evaluates the effects of red beet (RB) and betaine on rainbow trout submitted to an acute stress challenge. A control diet was compared with four experimental diets in which red beet (14 and 28%) and betaine (0.9 and 1.63%) were incorporated in different concentrations according to a factorial design. Cortisol in plasma and fin, glucose and lactate plasma levels, and malondialdehide (MDA) in muscle were all measured before the stress challenge and 30 min and 6 and 12 h after the stress challenge as parameters to determine the diet effects...
March 6, 2018: Fish Physiology and Biochemistry
Yong-Qiang Zhao, Dan-Li Mu, Di Wang, Ying-Li Han, Cong-Cong Hou, Jun-Quan Zhu
Spermatogenesis represents one of the most complicated morphological transformation procedures. During this process, the assembly and maintenance of the flagella and intracellular transport of membrane-bound organelles required KIF3A and KIF3B. Our main goal was to test KIF3A and KIF3B location during spermatogenesis of Boleophthalmus pectinirostris. We cloned complete cDNA of KIF3A/3B from the testis of B. pectinirostris by PCR and rapid amplification of cDNA ends (RACE). The predicted secondary and tertiary structures of B...
March 6, 2018: Fish Physiology and Biochemistry
Diego Bernal, Joseph P Reid, Julie M Roessig, Shinsyu Matsumoto, Chugey A Sepulveda, Joseph J Cech, Jeffrey B Graham
In fish, regional endothermy (i.e., the capacity to significantly elevate tissue temperatures above ambient via vascular heat exchangers) in the red swimming muscles (RM) has evolved only in a few marine groups (e.g., sharks: Lamnidae, Alopiidae, and teleosts Scombridae). Within these taxa, several species have also been shown to share similar physiological adaptations to enhance oxygen delivery to the working tissues. Although the hemoglobin (Hb) of most fish has a decreased affinity for oxygen with an increase in temperature, some regionally endothermic teleosts (e...
March 5, 2018: Fish Physiology and Biochemistry
Catarina C V Oliveira, Filipe Figueiredo, Florbela Soares, Wilson Pinto, Maria Teresa Dinis
The present study reveals the first characterization of the plasma melatonin rhythms of the meagre (Argyrosomus regius) under aquaculture conditions. Melatonin levels were monitored during a 24 h cycle under a photoperiod of 16 L:8D and under constant darkness (DD), respectively to characterize the daily rhythm of this indoleamine and to test its endogenous origin. Besides, to identify which light intensities are perceived as night or day by this species, the degree of inhibition of nocturnal melatonin production caused by increasing intensities of light was tested (3...
March 2, 2018: Fish Physiology and Biochemistry
Maciej Rożyński, Krystyna Demska-Zakęś, Agnieszka Sikora, Zdzisław Zakęś
The aim of the study was to describe the course and timing of the different stages of anesthesia induced with Propiscin (etomidate) on juvenile European perch (experiment I) and to describe the effect of immersing specimens of this species had on selected hematological and biochemical parameters (experiment II). The study was conducted on material with body weights (BW) of 162.98 (experiment I) and 171.60 g (experiment II). In experiment I, general anesthesia was induced with two different anesthetic concentrations (1 or 2 ml l-1 ; anesthesia time 10 min)...
February 23, 2018: Fish Physiology and Biochemistry
Michela Candelma, Luisa Dalla Valle, Sabrina Colella, Alberto Santojanni, Oliana Carnevali
Teleosts have many spawning strategies and the hormonal control of gametogenesis is not well defined among the species or even, between sexes. To increase the knowledge of gonadotropin hormones, we studied the trend by gene expression of gonadotropin receptors in the follicles and testis at different maturity stages in the European hake (Merluccius merluccius), a multiple-spawning species. With this aim, fshr and lhr were sequenced, characterized, and their gene expression was quantified in oocytes and in testes at different maturity stages...
February 23, 2018: Fish Physiology and Biochemistry
Viktor V Husak, Nadia M Mosiichuk, Olga I Kubrak, Tetiana M Matviishyn, Janet M Storey, Kenneth B Storey, Volodymyr I Lushchak
Copper is an essential element, but at high concentrations, it is toxic for living organisms. The present study investigated the responses of goldfish, Carassius auratus, to 96 h exposure to 30, 300, or 700 μg L-1 of copper II chloride (Cu2+ ). The content of protein carbonyls was higher in kidney (by 158%) after exposure to 700 mg L-1 copper, whereas in gills, liver, and brain, we observed lower content of protein carbonyls after exposure to copper compared with control values. Exposure to copper resulted in increased levels of lipid peroxides in gills (76%) and liver (95-110%) after exposure to 300 and 700 μg L-1 Cu2+ ...
February 20, 2018: Fish Physiology and Biochemistry
Carolina Castro, Amalia Peréz-Jiménez, Filipe Coutinho, Geneviève Corraze, Stéphane Panserat, Helena Peres, Aires Oliva Teles, Paula Enes
The aim of the present study was to assess the impact of an acute handling stress on hepatic oxidative status of European sea bass (Dicentrarchus labrax) juveniles fed diets differing in lipid so urce and carbohydrate content. For that purpose, four diets were formulated with fish oil (FO) and vegetable oils (VO) as lipid source and with 20 or 0% gelatinized starch as carbohydrate source. Triplicate groups of fish with 74 g were fed each diet during 13 weeks and then subjected to an acute handling stress. Stress exposure decreased hematocrit (Ht) and hemoglobin (Hb) levels...
February 19, 2018: Fish Physiology and Biochemistry
Ali Taheri Mirghaed, Mahyar Yasari, Seyed Saeed Mirzargar, Seyyed Morteza Hoseini
The aim of the present study was to investigate anesthetic efficacy of myrcene in rainbow trout (Oncorhynchus mykiss) along with the fish biochemical response to anesthesia in comparison with eugenol. In the first experiment, 240 fish were stocked in 12 tanks and acclimatized to experimental conditions for 2 weeks. Then, the fish of each tank were subjected to one concentration of either eugenol (12, 20, 30, 50, 80, and 130 μL/L) or myrcene (100, 150, 200, 300, 400, and 500 μL/L) concentrations. Induction time of and recovery time from anesthesia were recorded for each fish separately...
February 14, 2018: Fish Physiology and Biochemistry
Daniane C Zago, Alessandro C Santos, Carlos F C Lanes, Daniela V Almeida, Gessi Koakoski, Murilo S de Abreu, Carla C Zeppenfeld, Berta M Heinzmann, Luis F Marins, Bernardo Baldisserotto, Leonardo J G Barcellos, Mauro A Cunha
Dietary supplements are commonly used by animals and humans and play key roles in diverse systems, such as the immune and reproductive systems, and in metabolism. Essential oils (EOs), which are natural substances, have potential for use in food supplementation; however, their effects on organisms remain to be elucidated. Here, we examine the effects of dietary Aloysia triphylla EO supplementation on zebrafish behavior, metabolism, stress response, and growth performance. We show that fish fed diets containing A...
February 8, 2018: Fish Physiology and Biochemistry
Morteza Yaghoubi, Mansour Torfi Mozanzadeh, Omid Safari, Jasem G Marammazi
As amino acids (AAs) are vital molecules in the metabolism of all living organisms and are the building blocks of enzymes, a 6-week feeding trial was conducted for determining the influence of dietary essential amino acid (EAA) deficiencies on pancreatic, plasma, and hepatic enzyme activities in silvery-black porgy (initial weight 4.7 ± 0.01 g) juveniles. Eleven isoproteic (ca. 47%) and isoenergetic (ca. 20.5 MJ kg-1) diets were formulated including a control diet, in which 60% of dietary nitrogen were provided by intact protein (fish meal, gelatin, and wheat meal) and 40% by crystalline AA...
February 7, 2018: Fish Physiology and Biochemistry
Selma Bouchekioua, Sung-Pyo Hur, Yuki Takeuchi, Young-Don Lee, Akihiro Takemura
Most wrasses are protogynous species that swim to feed, reproduce during the daytime, and bury themselves under the sandy bottom at night. In temperate and subtropical wrasses, low temperature influences emergence from the sandy bottom in the morning, and induces a hibernation-like state in winter. We cloned and characterized the prohormone complementary DNAs (cDNAs) of arginine vasotocin (AVT) and isotocin (IT) in a temperate wrasse (Halichoeres tenuispinis) and examined the effects of day/night and temperature on their expression in the diencephalon, because these neurohypophysial peptides are related to the sex behavior of wrasses...
February 5, 2018: Fish Physiology and Biochemistry
Shengpeng Wang, Bin Wang, Songlin Chen
Spexin (SPX), a novel neuropeptide discovered by the bioinformatics approach, has been shown to exert pleiotropic functions in mammals. However, little information regarding the physiological role of SPX is available in teleosts. As a first step, we cloned the spexin gene from a flatfish, the half-smooth tongue sole. The open reading frame (ORF) of tongue sole spexin contained 363 nucleotides encoding a 120 amino acid (aa) preprohormone with a calculated molecular mass and isoelectric point of 14.06 kDa and 5...
February 5, 2018: Fish Physiology and Biochemistry
Wen-Jing You, Xiao-Ying Tan, Guang-Hui Chen, Chuan-Chuan Wei, Dan-Dan Li
Peroxisome proliferator-activated receptor beta (PPARβ) is a ligand-activated transcription factor that plays critical roles in the regulation of many important physiological processes. In this study, PPARβ was cloned and characterized in yellow catfish Pelteobagrus fulvidraco. PPARβ cDNA was 2350 bp in length with an open reading frame (ORF) of 1530 bp, encoding 509 amino acids, a 5'-untranslated region (UTR) of 474 bp, and a 3'-UTR of 346 bp. Similar to mammals, PPARβ protein was predicted to consist of four domains, the A/B domain, DNA-binding domain (DBD), D domain, and ligand-binding domain (LBD)...
February 1, 2018: Fish Physiology and Biochemistry
Mei Shang, Baofeng Su, Dayan A Perera, Ahmed Alsaqufi, Elizabeth A Lipke, Sehriban Cek, David A Dunn, Zhenkui Qin, Eric Peatman, Rex A Dunham
Our aim was to transplant blue catfish germ line stem cells into blastulae of triploid channel catfish embryos to produce interspecific xenogenic catfish. The morphological structure of the gonads of blue catfish (Ictalurus furcatus) in ~ 90- to 100-day-old juveniles, two-year-old juveniles, and mature adults was studied histologically. Both oogonia (12-15 μm, diameter with distinct nucleus 7-8 μm diameter) and spermatogonia (12-15 μm, with distinct nucleus 6-7.5 μm diameter) were found in all ages of fish...
January 22, 2018: Fish Physiology and Biochemistry
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