Recent Publications

Students supervised/trained by H. Volkoff are indicated by * (undergraduate), ** (graduate) and *** (postoc)

Researchgate

Pubmed

2022

  • Lorenz***, E.K., Sabioni***, R.E., Volkoff, H. and Cyrino, J.E.P. Growth performance, health, and gene expression of appetite-regulating hormones in Dourado Salminus brasiliensis, fed vegetable-based diets supplemented with swine liver hydrolysate. Aquaculture, 548(2): 737640.

2021

2020

  • Volkoff, H. Feeding and its Regulation, Chapter 5. In: “Climate Change and Non-infectious Fish Disorders”, Patrick TK Woo and George K lwama (eds.), CABI.
  • Nadermann, N.* and Volkoff, H. Effects of short-term exercise on food intake and the expression of appetite-regulating factors in goldfish. Peptides, 123, article 170182.

2019

  • Schartl, M. Kneitz, S., Volkoff, H., Adolfi, M., Schmidt, C., Fischer, P., Minx, P., Tomlinson, C., Meyer, A, Warren, W. C. The piranha draft genome provides molecular insight associated to its unique feeding behavior. Genome Biology and Evolution, 11 (8): 2099–2106
  • London, S.** and Volkoff, H. Effects of fasting on the central expression of appetite-regulating and reproductive hormones in wild-type and Casper zebrafish (Danio rerio). Gen. Comp. Endocrinol., 282, article 113207.
  • Nadermann, N.*, Seward, R.K.* and Volkoff, H. Effects of potential climate change -induced environmental modifications on food intake and the expression of appetite regulators in goldfish. Comp. Biochem. Physiol. A., 235:138-147.
  • London, S.** and Volkoff, H., Cloning and effects of fasting on the brain expression levels of appetite-regulators and reproductive hormones in glass catfish (Kryptopterus vitreolus). Comp. Biochem. Physiol. A. 228:94-102.
  • Butt, Z.D.*, O’Brien , E.*, Volkoff, H., Effects of fasting on the gene expression of appetite regulators in three Characiformes with different feeding habits (Gymnocorymbus ternetzi, Metynnis argenteus and Exodon paradoxus). Comp. Biochem. Physiol. A. 227:105-115.

2018

  • Mandic S.* and Volkoff, H. (2018) The effects of fasting and appetite regulators on catecholamine and serotonin synthesis pathways in goldfish (Carassius auratus). Comp. Biochem. Physiol., 223:1-9.

2017

  • Mennigen, J. A., Volkoff, H., Chang, J. P., & Trudeau, V. L. (2017). The nonapeptide isotocin in goldfish: Evidence for serotonergic regulation and functional roles in the control of food intake and pituitary hormone release. Gen. Comp. Endocrinol., 254:38-49.
  • Pitts, P.M.** and Volkoff, H. (2017) Characterization of appetite-regulating factors in platyfish, Xiphophorus maculatus (Cyprinodontiformes Poeciliidae). Comp. Biochem. Physiol. 208:80-88.
  • Butt*, Z.D., Hackett,* J.D., Volkoff H. (2017) Irisin in goldfish (Carassius auratus): effects of irisin injections on feeding behavior and expression of appetite regulators, uncoupling proteins and lipoprotein lipase, and fasting-induced changes in FNDC5 expression. Peptides, 90:27-36.
  • Volkoff, H., Sabioni R.E.***, Coutinho, L.L., Cyrino, J.E.P. (2017) Appetite regulating factors in pacu (Piaractus mesopotamicus): tissue distribution and effects of food quantity and quality on gene expression. Comp. Biochem. Physiol. Part A, 203:241-253.

2016

  • Volkoff H., Sabioni R.E.***, Cyrino J.E.P. (2016) Appetite regulating factors in dourado, Salminus brasiliensis: cDNA cloning and effects of fasting and feeding on gene expression. Gen Comp Endocrinol, 237: 34-42.
  • White, S., Volkoff, H. and Devlin, R. (2016) Regulation of feeding behavior and food intake by appetite-regulating peptides in wild-type and growth hormone-transgenic coho salmon. Hormones Behav, 84: 18-28.
  • Camarillo-Sepulveda, N.**; Hamoutene, D.; Lush, L.; Burt, K.; Volkoff, H.; Fleming, I.A. (2016) Sperm traits in farmed and wild Atlantic salmon Salmo salar. J Fish Biol, 88: 709–717.
  • Mikwar M., Navarro-Martin L., Xing L., Volkoff H., Hu W. and Trudeau V.L. (2016) Stimulatory effect of the secretogranin-ll derived peptide secretoneurin on food intake and locomotion in female goldfish (Carassius auratus). Peptides, 78: 42-50.
  • Volkoff, H. (2016) Feeding behavior, starvation response and endocrine regulation of feeding in Mexican blind cavefish (Astyanax fasciatus mexicanus). In: The Biology and Evolution of the Mexican Cavefish, Keene, A., Yoshizawa, M. and McGaugh, S. (Eds.), Elsevier. Chapter 14.

2015

  • Volkoff, H. (2015) Cloning, tissue distribution and effects of fasting on mRNA expression levels of leptin and ghrelin in red-bellied piranha (Pygocentrus nattereri). Gen. Comp. Endocrinol. 217–218: 20–27.
  • Kim J.H., Leggatt R.A., Chan M., Volkoff H., Devlin R.H. (2015) Effects of chronic growth hormone overexpression on appetite-regulating brain gene expression in coho salmon. Mol. Cell. Endocrinol. 413:178-188.

2014

  • Volkoff, H. (2014) In vitro assessment of interactions between appetite-regulating peptides in brain of goldfish (Carassius auratus). Peptides, 61: 61-68.
  • Tuziak, S.M.**, Rise, M.L. and H. Volkoff (2014) An investigation of appetite-related peptide transcript expression in Atlantic cod (Gadus morhua) brain following a Camelina sativa meal-supplemented feeding trial. Gene, 550: 253-263.
  • Volkoff. H. (2014) Appetite regulating peptides in red-bellied piranha, Pygocentrus nattereri: cloning, tissue distribution and effect of fasting on mRNA expression levels. Peptides, 56:116-124.
  • Hayes, J. ** and H. Volkoff (2014) Characterization of the endocrine, digestive and morphological adjustments of the intestine in response to food deprivation and torpor in cunner, Tautogolabrus adspersus. Comp. Biochem. Physiol. A., 170:49-59.
  • Penney*, C.C. and H. Volkoff (2014) Peripheral injections of cholecystokinin, apelin, ghrelin and orexin in cavefish (Astyanax fasciatus mexicanus): effects on feeding and on the brain expression levels of tyrosine hydroxylase, mechanistic target of rapamycin and appetite-related hormones. Gen. Comp. Endocrinol., 196:34-40.

2013

  • Tuziak**, S.M. and H. Volkoff (2013) Melanin-concentrating hormone (MCH) and gonadotropin-releasing hormones (GnRH) in Atlantic cod, Gadus morhua: Tissue distributions, early ontogeny and effects of fasting. Peptides, 50:109-118.
  • Babichuk**, N. and H. Volkoff (2013). Changes in expression of appetite-regulating hormones in the cunner (Tautogolabrus adspersus) during short-term fasting and winter torpor. Physiol. Behav. 120:54–63.
  • Wall*, A. and H. Volkoff (2013). Effects of fasting and feeding on the brain mRNA expressions of orexin, tyrosine hydroxylase (TH), PYY and CCK in the Mexican blind cavefish (Astyanax fasciatus mexicanus). Gen. Comp. Endocrinol. 183: 44-52.
  • Tuziak**, S.M. and H. Volkoff (2013) Gonadotrophin-releasing hormone in winter flounder (Pseudopleuronectes americanus): Molecular characterization, distribution and effects of fasting. Gen. Comp. Endocrinol. 184:9-21
  • Volkoff, H. (2013) The effects of amphetamine injections on feeding behavior and the brain expression of orexin, CART, tyrosine hydroxylase (TH) and thyrotropin releasing hormone (TRH) in goldfish (Carassius auratus). Fish Physiol. Biochem. 39:979-991.

2012

  • Hoskins **, LJ and Volkoff, H. (2012) Daily patterns of mRNA expression of two core circadian regulatory proteins, Clock2 and Per1, and two appetite-regulating peptides, OX and NPY, in goldfish (Carassius auratus, Linnaeus). Comp. Biochem. Physiol. A. 163(1):127-36.
  • Tuziak**, S.M. and H. Volkoff (2012) A preliminary investigation of the role of melanin-concentrating hormone (MCH) and its receptors in appetite regulation of winter flounder (Pseudopleuronectes americanus). Mol. Cell. Endocrinol., 348:281-296
  • K. Burt, D. Hamoutene, J. Perez-Casanova, A.K. Gamperl and H. Volkoff (2012) The effect of intermittent hypoxia on growth, appetite and some aspects of the immune response of Atlantic salmon (Salmo salar). Aquaculture Res, 2012, 1–14.
  • Volkoff, H. (2012) Orexins in non-mammalian vertebrates. In: Vitamins and Hormones, volume 89: Sleep Hormones, Gerard Litvak (Ed.), Elsevier, Chapter 17.
  • Bar, N. and H. Volkoff (2012). Adaptation of the Physiological, Endocrine, and Digestive System Functions to Prolonged Food Deprivation in Fish. In: Comparative Physiology of Fasting, Starvation, and Food Limitation. M. D. McCue (Ed.), Springer, Chapter 6, pp. 69-90.

2011

  • Abbott*, M. and Volkoff, H. (2011) Thyrotropin Releasing Hormone (TRH) in goldfish (Carassius auratus): role in the regulation of feeding and locomotor behaviors and interactions with the orexin system and cocaine- and amphetamine regulated transcript (CART), Horm.  Behav., 59(2):236-45.
  • Volkoff, H. (2011) Control of appetite. In: The Encyclopedia of Fish Physiology: From genome to environment, Farrell A.P., J.J. Cech, J.G. Richards, and E.D. Stevens (Eds), Elsevier, Chapter 273.
  • Hamoutene, D., Volkoff, H., Parrish, C., Samuelson, S., Mabrouk, G., Mansour, A., Mathieu, A., King, T., and Lee, K., 2011. Effect of produced water on innate immunity, feeding and antioxidant metabolism in Atlantic cod (Gadus morhua). In: Produced Water: Environmental Risks and Advances in Mitigation Technologies (Lee, Kenneth; Neff, Jerry, Eds.). Springer, Chapter 16.

2010

  • Buckley*, C., MacDonald**, E.E., Tuziak**, S.M. and Volkoff H. (2010) Molecular cloning and characterization of two putative appetite regulators in winter flounder (Pleuronectes americanus): Preprothyrotropin releasing hormone (TRH) and preproorexin (OX). Peptides, 31(9):1737-1747.
  • Volkoff, H., Hoskins**, L.J. and Tuziak**, S.M. (2010) Influence of intrinsic signals and environmental cues on the endocrine control of feeding in fish: potential application in aquaculture, Gen. Comp. Endocrinol., 167: 352-359.
  • Elsie Tachie Mensa, Helene Volkoff and Suraj Unniappan (2010). Galanin Systems in Non-mammalian Vertebrates with Special Focus on Fishes, In: Galanin, Edited by Tomas Hökfelt, Experientia Supplementum Volume 102, pp 243-262.

2009

  • Volkoff, H. and Wyatt*, J.L. (2009) Apelin in goldfish (Carassius auratus): cloning, distribution and role in appetite regulation. Peptides, 30:1434-1440.
  • MacDonald**, E. and Volkoff, H. (2009) Cloning, distribution and effects of season and nutritional status on the expression of neuropeptide Y (NPY), cocaine and amphetamine regulated transcript (CART) and cholecystokinin (CCK) in winter flounder (Pseudopleuronectes americanus). Horm. Behav., 56(1):58-65
  • MacDonald**, E. and Volkoff, H. (2009) Neuropeptide Y (NPY), cocaine and amphetamine regulated transcript (CART) and cholecystokinin (CCK) in winter skate (Raja ocellata): cDNA cloning, tissue distribution and mRNA expression responses to fasting. Gen. Comp. Endocrinol., 161:252-261.
  • Martínez-Álvarez***, R.M., Volkoff H., Muñoz-Cueto J.A. and Delgado M.J. (2009) Effect of calcitonin gene-related peptide (CGRP), adrenomedullin and adrenomedullin-2/intermedin on food intake in goldfish (Carassius auratus). Peptides, 30(4):803-7.
  • Xu**, M. and Volkoff, H. (2009) Cloning, tissue distribution and effects of food deprivation on pituitary adenylate cyclase activating polypeptide (PACAP)/ PACAP-related peptide (PRP) and preprosomatostatin 1 (PPSS 1) in Atlantic cod (Gadus morhua). Peptides, 30(4):766-76.
  • Volkoff, H., Unniappan, S. and Kelly, S.P. (2009) The endocrine regulation of food intake. In: Fish Neuroendocrinology, chapter 9, Edited by NJ Bernier, G Van Der Kraak, AP Farrell and CJ Brauner, Fish physiology, vol. 28, Pages 421-465.

Contact

Helene Volkoff

230 Elizabeth Ave, St. John's, NL, CANADA, A1B 3X9

Postal Address: P.O. Box 4200, St. John's, NL, CANADA, A1C 5S7

Tel: (709) 864-8000