.... Therefore, we assessed in rainbow trout hypothalamus the effects of raised levels of glucose on the levels and phosphorylation status of two transcription factors, FoxO1 and CREB, possibly involved in linking these processes. We also aimed to assess the changes in the levels and phosphorylation status...

... fish and their hydrodynamic environment. This study investigated the space use of brown trout, Salmo trutta , in a complex hydrodynamic flow field created using an array of different sized vertically oriented cylinders in a large open-channel flume in which confounding variables were controlled...

...Paul L. Else ABSTRACT The thermal dependence (0–40°C) of Na + flux in isolated liver cells of three endotherms (mice, rat and rabbit) was compared with that of ectotherms in the form of a thermally tolerant amphibian (cane toad), a cold-water fish (rainbow trout) and a thermophilic reptile (lizard...

...), arginine vasotocin (AVT), adrenocorticotropic hormone (ACTH) and corticosteroids. In this study, we show for the first time in teleost fish (rainbow trout) the short- and mid-term time course of the response of the forebrain serotonergic and dopaminergic activities after exposure to an acute stressor...

... pathway in the growth and development of skeletal muscle in teleost fish, transgenic rainbow trout (RBT; Oncorhynchus mykiss ) expressing a truncated form of the acvr2b-2a ( acvr2b ▵ ) in muscle tissue were produced. High levels of acvr2b ▵ expression were detected in the majority of P1 transgenic fish...

...Jorge J. Pérez-Maceira; María J. Mancebo; Manuel Aldegunde SUMMARY In this study, we evaluated the serotonin-mediated control of cerebral glycogen levels in the rainbow trout, Oncorhynchus mykiss . Intracerebroventricular (i.c.v.) administration of serotonin (5-HT) to normoglycemic trout (time...

...Marta Conde-Sieira; Marcos A. López Patiño; Jesús M. Míguez; José L. Soengas SUMMARY To assess whether the glucosensing capacity in peripheral (liver and Brockmann bodies) and central (hypothalamus and hindbrain) locations of rainbow trout displays day–night variations in its response to changes...

...Marta Conde-Sieira; Marta Librán-Pérez; Marcos A. López Patiño; Jesús M. Míguez; José L. Soengas SUMMARY Stress conditions induced in rainbow trout a readjustment in the glucosensing response of the hypothalamus and hindbrain such that those sensors did not respond properly to changes in glucose...

...) and anorexigenic (POMC, CART and CRF) peptides in central glucosensing areas (hypothalamus and hindbrain) of rainbow trout subjected to normoglycaemic (control), hypoglycaemic (4 mg insulin kg –1 ) or hyperglycaemic (500 mg glucose kg –1 ) conditions for 6 h under normal stocking density (NSD; 10 kg fish mass m –3...

...C. Michele Nawata; Chris M. Wood; Michael J. O'Donnell SUMMARY Recent experimental evidence from rainbow trout suggests that gill ammonia transport may be mediated in part via Rhesus (Rh) glycoproteins. In this study we analyzed the transport properties of trout Rh proteins (Rhag, Rhbg1, Rhbg2...

...E. M. Standen SUMMARY Contrary to the previous premise that pelvic fins lacked obvious function, recent work on three-dimensional fin motions suggests that pelvic fins actively control stability and speed in slowly swimming trout. This study used electromyography to measure pelvic fin muscle...

...Mònica Díaz; Encarnación Capilla; Josep V. Planas SUMMARY In brown trout, red and white skeletal muscle express the insulin-regulatable glucose transporter 4 (btGLUT4). We have previously shown that the mRNA expression of btGLUT4 in red muscle, but not white muscle, is altered under experimental...

... to roll. In this paper we examine the hydrodynamics of trout anal fin function and hypothesize that anal fins,located below the fish's rolling axis, produce similar jets to the dorsal fin and help balance rolling torques during swimming. We simultaneously quantify the wake generated by dorsal and anal...

..., but its existence and function in non-mammalian non-vascular smooth muscle have not been examined. In the present study we examined H 2 S production and its physiological effects in urinary bladder from steelhead and rainbow trout ( Oncorhynchus mykiss ) and evaluated the relationship between H 2 S...

... of the preovulatory oocyte has ever been reported in rainbow trout ( Oncorhynchus mykiss ). In the present study, oocyte water content and dry mass were monitored using consecutive samples taken in vivo from the same female rainbow trout,from 4–5 days prior to ovulation to up to 7 days post-ovulation. In addition...

.... No study to date has examined the thermally induced compositional changes of raft and non-raft regions of the PM separately. In this study we have measured the phospholipid class composition and fatty acid composition of raft-enriched (raft) and raft-depleted PM (RDPM) of hepatocytes from trout...

... respiratory measurements and the carcass analyses suggest that eels have a much higher metabolic efficiency than trout. In eel, the COT values obtained from oxygen consumption data and carcass analyses are 0.42 and 0.62 kJ kg –1 km –1 , respectively, whereas trout has much higher COT values (respirometry...

...Jeremy A. Goldbogen; Robert E. Shadwick; Douglas S. Fudge; John M. Gosline SUMMARY Muscle length changes of the lateral myotomal fast fibers of rainbow trout( Oncorhynchus mykiss ) were measured using sonomicrometry during induced fast-starts. Simultaneous high-speed videography allowed...

... by interacting with key regulators of the cell cycle. In order to determine the role of Id-encoding genes during fish development and especially in early myogenesis, we examined the expression patterns of Id1, Id2 and two nonallelic Id6 (Id6a and Id6b)-encoding genes in developing trout embryos. These four Id...

...Anna Llach; Jingbo Huang; Franklin Sederat; Lluis Tort; Glen Tibbits; Leif Hove-Madsen SUMMARY Long depolarizations cause a steady tonic contraction and induce sarcoplasmic reticulum (SR) Ca 2+ -uptake in trout atrial myocytes. Simultaneous measurements of cytosolic [Ca 2+ ]([Ca 2+ ] i ) and whole...