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INRA
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31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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reprofish

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Spawning Control

Laboratories working on spawning control.

NEW JERSEY ACADEMY FOR AQUATIC SCIENCES
Scientific Interest: Gonad and gamete physiology; general reproductive biology including behaviour, embryology and growth.

Description of research: The New Jersey Academy for Aquatic Sciences promotes the understanding, appreciation and protection of aquatic life and habitats through research, education and youth development programs. The Academy is active in species survival and conservation efforts. Research focuses on the study of the reproductive processes of aquatic animals to provide alternative means for breeding, or aquaculture. Currently a comprehensive study is being undertaken on the reproductive biology of Apogonidae, a large family of marine and mostly coral reef associated fishes. Research is in progress on the origin and direct development (lack of a planktonic dispersing larval stage) within this group and its phylogenetic significance. Other species the Academy studies are jellyfish, sea ravens, gobies, and the Bangaii cardinalfish (Pterapogon kauderni).

Lead researcher(s): Dr Alejandro A. Vagelli

Contact details: Director of Science & Conservation, New Jersey Academy for Aquatic Sciences, 1 Riverside Drive, Camden, NJ 08103. Tel:(856) 361-1026; Fax:(856) 365-3318

Website: NJAAS
NATIONAL AGRONOMY RESEARCH INSTITUTE (INRA) - SCRIBE
Research Group: Fish Reproduction

Scientific Interest: Neuroendocrinology, gonad physiology

Research Application: Puberty, fertility and spawning control

Description of Research: The SCRIBE research unit (joint research unit for fish physiology, biodiversity and the environment) is working towards improving understanding of molecular mechanisms underlying puberty onset, gamete production and spawning in fish. The research is directed towards molecular characterisation of genes involved in the endocrine (estradiol, testosterone, 11 ketotestosterone, progestin...) and / or paracrine regulation of spermatogenesis using functional genomic approaches (transcriptome). This study includes the functional and biochemical characterisation of key molecules (TGF beta members pathway etc.) involved in the reciprocal interactions between the somatic and germ cells in the testicule. Research investigates the molecular and functional characterisation of candidate neuroendocrine pathways involved in gonadotrophin release in fish; studies are carried out into the KISS/GPR54 and GnRH/GnRH receptor pathways that are involved in GnRH and gonadotrophin release respectively. These studies include the identification of the different key molecules, their functional characterisation (biochemical and biological properties) and their regulation.

Lead Researcher(s): Florence Le Gac, Jean-Jacques Lareyre

Contact Details: INRA-SCRIBE, Campus Scientifique de Beaulieu, 35042 Rennes cedex.

Institute Website:http://w3.rennes.inra.fr/scribe
INSTITUTO DE ACUICULTURA DE TORRE DE LA SAL, SPANISH COUNCIL FOR SCIENTIFIC RESEARCH (IATS-CSIC)
Research Group: Group of Fish Reproductive Physiology (GFRP)

Scientific Interest: Gonad physiology; neuroendocrinology; photoperiod, pineal gland, melatonin

Description of Research: The aim of the GFRP is to improve knowledge of the mechanisms that regulate the fish reproductive process by: 1) development of in vitro and in vivo models to study the function of gonadotropins (GTH's) as key factors in gonad development and gametogenesis; 2) studies on the function of GnRH(s) and GTH(s) in sexual differentiation, puberty and the reproductive cycle; 3) understanding the role of environmental factors such as photoperiod and temperature on the control of puberty and the reproductive cycle; 4) generation of tools related to gene transfer in fish and their application to studies of gene function and evaluation for future biotechnological applications (gene therapy); 5) promotion of studies for identification and genetic analysis of molecular markers associated with traits of interest to aquaculture (sex ratio, precocity); 6) development of biotechnological tools for application in the control and manipulation of reproductive processes in farmed populations.

Lead Researcher(s): Silvia Zanuy (gametogenesis), Manuel Carrillo (environmental control), Ana Gomez (molecular biology), Alicia Felip (molecular markers)

Contact Details: Instituto de Acuicultura de Torre de la Sal, Torre de la Sal S/N, 12595 Ribera de Cabanes, Castellon, Spain

Institute Website:http://www.iats.csic.es
HUJI
Research Group: Fish Reproduction

Scientific Interest: Neuroendocrinology; Growth / Reproduction Interactions

Description of Research: Research is focused on understanding the cellular and molecular mechanisms through which the hypothalamus regulates the pituitary to secrete gonadotropins. This includes the GnRH/GnRHR system, the dopamine/dopamine D2-R system and also more recently the kisspeptin/GPR54 systems. Work is also conducted on how physiological changes arise from changes in social status. Tilapia and zebrafish are used as models, as well as all the leading aquaculture species in Israel (sturgeon, carp, mullet, bass etc.). Techniques used range from cellular to molecular and biochemical. Research is also devoted to exploring the processes leading to both reproduction and growth in fish. Work focuses on the influence of the brain-pituitary-gonad axis on reproduction and how it interacts with all the stages on the fish life cycle. ELISA's have been developed for the measurement of gonadotropins and GH, based on recombinant proteins, as well as calibrated methods for the measurement of estradiol, 11-ketotestosterone and 17alpha, 20beta, dihydroxy-progesterone.

Lead Researcher(s): Berta Levavi-Sivan

Contact details: Faculty of Agricultural, Food and Environmental Quality Sciences, Department of Animal Sciences, The Hebrew University of Jerusalem, Rehovot. 76100 Israel. Tel (office): +972 8 9489988; Tel (lab): +972 8 9489868; Fax: +972 8 9465763.

Website: HUJI
UNIVERSITY OF NANCY, UR AFPA
Research Group: Domestication in Inland Aquaculture (DAC)

Scientific Interest: Photoperiod, pineal gland, melatonin

Description of research: The DAC team is mainly concerned with the control of the reproductive cycle (environmental control, temperature and photoperiod interactions) of new candidate species for aquaculture such as Eurasian perch and pikeperch. The primary objective is to produce models for the determinism of reproductive cycle performance. A second objective is to analyse the effects of domestication.

Lead researcher(s): Pascal FONTAINE

Contact details: URAFPA, DAC team, 34 rue Sainte Catherine, F-54000 Nancy. Tel: +33 (0)3 83 30 84 47

Website:http://www.urafpa.fr
UNIVERSITY OF STIRLING, INSTITUTE OF AQUACULTURE
Research Group: Genetics and Reproduction

Country: Scotland, UK

Scientific interest: Photoperiod, pineal gland, melatonin

Description of research: The major focus of the genetics and reproduction group is on management of broodstock and production of fish as a controllable and sustainable resource. This involves studies of control of maturation and puberty, development and management of selective breeding programmes, mechanisms involved in sex differentiation and gender control, and basic research on important traits and genes. All of these areas combine use of innovative techniques in molecular biology, genomics and proteomics, with whole animal studies of physiology and function, in particular where they are relevant to commercial culture. A major thrust in recent years has been the application of this expertise to questions raised by the ever-expaning interests in new aquaculture species and species diversification, particularly with regards to marine fish. Within the reproduction team more specifically, three main fields are under investigation: reproductive physiology and photoperiodic control of reproduction and growth in marine fish (currently the main focus is on salmon, cod, trout and sea bass), molecular basis of the "photoperiodism" network, focusing on the melatonin (light cascade) and clock gene (chronobiology) systems (currently the main focus is on salmon, tilapia, catfish and cod) and genetic effects on fish performance and welfare (e.g. characterisation of triploid salmon and cod). The work is both scientific in terms of understanding the mechanisms behind the biological effects such as circadian rhythms of melatonin, clock genes, brain-pituitary-gonad axis; and applied in order to improve the production techniques for salmon, trout, sea bass, cod, Nile tilapia and catfish.

Lead researcher(s): Hervé MIGAUD, Andrew DAVIE, John TAYLOR

Contact details: University of Stirling, Institute of Aquaculture, FK94LA Stirling, UK

Website: http://www.aquaculture.stir.ac.uk/rep-gen/research.html
UNIVERSITY OF CADIZ, DEPT OF BIOLOGY, FACULTY OF MARINE & ENVIRONMENTAL SCIENCES
Research Group: Fish Neuroendocrinology

Scientific interest: Neuroendocrinology; photoperiod, pineal gland, melatonin

Description of research: Fish neuroanatomy and neuroendocrinology, in particular for the marine teleost species seabream, seabass and sole. These studies include the elaboration of brain atlases for these three species and the study of the main neuroendocrine systems controlling reproduction. Attention focuses on GnRH in perciforms and analysis of the distribution of different GnRH systems (GnRH-1, GnRH-2 and GnRH-3), their pattern of projection, their targets (GnRH receptors) and the ontogeny of different GnRH cell populations.

Research also focuses on the mechanisms underlying the perception of photoperiodic information and its propagation to central endocrine centres controlling reproduction and other rhythmic processes in fish. The characteristics of the pineal organ are analysed in seabass and sole, as well as the interaction of melatonin and pineal efferents with the main endocrine centres, and melatonin mechanisms of action via specific receptors along the brain-pituitary-gonad axis. The effects of light and thermal cycles on the development of the circadian system in sole are also being investigated.

Lead researcher(s): José A. Munoz-Cueto

Contact details: Departamento de Biologia, Facultad de Ciencias del Mar y Ambientales, Universidad de Cadiz, Poligono Rio San Pedro, E-11510-Puerto Real, Cadiz, Spain. Tel: +34 956 016023

Website: http://www.uca.es/dpto/C138
POLYTECHNIC UNIVERSITY OF MARCHE (UNIVPM); MARINE SCIENCE DEPARTMENT (DISMAR)
Research Group: Reproduction & Developmental Biology

Scientific Interest: Gonad physiology

Description of Research: The group is working towards improving understanding and knowledge of (a)gamete quality in teleosts, (b)reproductive endocrinology and physiology of fish, (c)development of new technologies for environmentally-friendly aquaculture, and (d)reproductive toxicology to monitor environmental risks. (a)In terms of gametes, the quality of eggs and sperm may be affected by chemical and physical factors (meteorological and oceanographical parameters such as temperature, pH, salinity, oxygen, carbon dioxide etc.), as well as by anthropogenic factors. The global changes in marine species may have dramatic effects on fecundity, fish biomass and biodiversity of the most economically relevant species. The quality of gametes can be evaluated by molecular, cellular and morphological tools. These results may be used as an early warning signal to avoid the collapse of resources and to improve their future management. (b)Research into the reproductive endocrinology and physiology of fish is directed towards improved knowledge for the selection of new species for aquaculture, including tropical fish for the aquarium trade and for the purposes of restocking endangered species into their natural habitat. (c)Development of new biotechnologies for environmentally-friendly aquaculture is concerned with natural products displaying immuno-modulatory activity, probiotics and prebiotics. Their properties are identified by biological tests, commercial feed additives developed, administration protocols optimised and fish welfare taken into account (improvement of stress tolerance, growth, food intake and health status). (d)One of the goals of reproductive toxicology research is to develop biomarkers to determine how contaminants alter the health of wild populations. In order to evaluate if remedial action reduces the toxic effects of exposure to mixtures of contaminants, a wide spectrum of reproductive aspects (endocrinology, immunity, genotoxicology) are studied using a genomic and proteomic approach on various marine fish models (Sparus aurata, Solea solea, Fundulus heteroclitus, Danio rerio).

Lead Researcher: Oliana Carnevali

Contact Details: Universita Politecnica delle Marche, Via Brecce Bianche, 60131 Ancona, Italy

Institute website:www.dismar.univpm.it
HELLENIC CENTRE FOR MARINE RESEARCH, INSTITUTE OF AQUACULTURE
Research Group: Reproductive biology

Scientific Interest: Gamete physiology, gonad physiology, endocrinology

Description of research: The study of reproductive biology and endocrinology in finfish. The identification of reproductive dysfunctions occuring in male and female brood fish in captivity. The development of pharmacological methods for the control of reproduction, induction of spawning and improvement of sperm quality in commercially important cultured fish. A major application of this research is the development of controlled-release delivery systems (implants) for agonists of the neuropeptide gonadotrophin-releasing hormone (GnRHa). Species of interest include the European sea bass (Dicentrarchus labrax), shi drum (umibrina cirrosa), dusky grouper (Epiniephelus marginatus), greater amberjack (Seriola dumerili) and atlantic bluefin tuna (Thunnus thynnus).

Lead researcher(s): Constantinos C. MYLONAS

Contact details: Hellenic Centre for Marine Research, Institute of Aquaculture, Ex US Military Base of Gournes, PO Box 2214, Iraklion, Crete 71003.

Website:www.hcmr.gr
NOAA, NORTHWEST FISHERIES SCIENCE CENTER
Research Group: Physiology Team (integrative fish biology program)

Scientific Interest: Neuroendocrinology, growth / reproduction interactions

Description of research: Research projects include both basic and applied studies on the endocrine control of reproduction in fish, primarily salmon. Main interests are the physiology of gonadotropins, mechanisms of puberty in fish, and how growth and environmental factors influence the age of sexual maturity. Under the captive broodstock research project, research is conducted on how growth at various points in the life cycle influences the age of sexual maturation, fecundity, egg size and gamete viability. The goal of this research is to develop diets and growth regimes that allow for better control of the age of maturation in captively-reared fish. How rearing temperature influences the seasonal timing of spawning is also being investigated, in order to develop methods to advance spawning time in captively reared fish, which are delayed from wild fish. Molecular studies are also being conducted to better understand regulation of hormone receptors, such as gonadotropin-releasing hormone and gonadotropin receptors.

Lead researcher(s): Penny SWANSON

Contact details: NOAA, Northwest Fisheries Science Center, 2725 Montlake Blvd East, Seattle, WA, USA.

Website:http://www.nwfsc.noaa.gov/index.cfm
TOKYO UNIVERSITY OF MARINE SCIENCE & TECHNOLOGY, DEPT OF MARINE BIOSCIENCES
Research Group: Fish physiology

Scientific Interest: Gamete physiology, gonad physiology

Description of research: Development of surrogate broodstock technology in fish by germ cell transplantation; one of the final objectives of this study is to make surrogate mackerel recipients produce bluefin tuna gametes. Cryopreservation of fish germ cells; since there is no cryopreservation technique for fish eggs and embryos currently available, this will be a breakthrough for preservation of fish genetic resources. In vitro culture of fish germ cells in order to use them as an alternative to ES cells. Analysis of endocrine control of fish germ cell proliferation and differentiation.

Lead researcher(s): Goro YOSHIZAKI

Contact details: Tokyo University of Marine Science & Technology, Dept of Marine Biosciences, 4-5-7 Konan, Minato-Ku, Tokyo, 108-8477 Japan.

Website: http://www2.kaiyodai.ac.jp/seibutsuHP/english/index.html
IRTA SANT CARLES DE LA RAPITA
Research discipline: CONTROL OF REPRODUCTION WITH BIO-TECHNOLOGIES & HUSBANDRY
Scientific interest: Gamete physiology

Description of research: To apply and adjust available bio-technologies to control reproduction and obtain the spawning of good quality eggs. Activities include: acclimatisation of wild broodstock; manipulation of environmental parameters, holding systems and nutrition in order to obtain maturation to advanced stages, vitellogenesis and spermatogenesis; determination of stage of maturity; hormone induced spawning; environmentally controlled spawning; determination of egg and larval quality. The team is currently working on the meagre (Argyrosomus regius), Senegal sole (Solea senegalensis) and gilthead seabream (Sparus aurata).

Lead researcher(s): Neil Duncan, Alicia Estevez, Cristobal Aguilera

Contact details: IRTA Sant Carles de la Rapita, Crta. Poble Nou, km. 5.5, AP200, 43540 Sant Carles de la Rapita, Tarragona, Spain. Tel. +34 977745427, Fax. +34 977744138.

Website: www.irta.cat