Aquaculture and Water Ecology
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Dr. Stephan Wessels


Ausbildung

Promotion an der Göttingen Georg-August-Universität Göttingen, 2006.
Dissertation: Selektionsexperimente zur Erhöhung des Männchenanteils bei Nilbuntbarschen mittels Temperaturbehandlung. Prüfungskommission: Prof. Dr. Gabriele Hörstgen-Schwark, Prof. Dr. Erich Bruns, Prof. Dr. Wolfgang Lücke.
M.sc. Landwirtschaft, Georg-August-Universität Göttingen, 2004.
Erasmus Semester, Universidad Politecnica de Valencia, Spanien, 2003.

Forschungsinteressen

Quantitative Genetik, Molekulargenetik, Selektionsexperimente, Genotyp-Umwelt-Interaktionen, Geschlechtsdetermination & QTL-Detektion

Forschungsprojekte, Stipendien & Preise

DFG Sachbeihilfe (DFG WE4434/2-1), 2011-2014.
DFG Post-Doc Stipendium, (DFG, WE4434/1-1), 2008-2009.
Förderpreis der Deutschen Gesellschaft für Züchtungskunde e.V. (DGfZ), 2007.
Beste Präsentation, Genetics in Aquaculture Konferenz, IAGA IX, Montpellier, Frankreich, 25-30 June 2006.

Gutachter Tätigkeit

Aquaculture.
Sexual Development.
Frontiers in Zoology.
Plos One.
BMC Genetics.

Internationale Erfahrungen

Nepal, DAAD Wissenschaftlicher Austausch im Rahmen einer Fachbezogenen Partnerschaft. September, 2011.
Frankreich, DFG Post-Doc Stipendium, Oktober 2008-September 2009.
Thailand, DAAD Wissenschaftlicher Austausch im Rahmen einer Fachbezogenen Partnerschaft. Oktober-November, 2005.

Lehre

Aquakultur I, B.sc., Wintersemester, seit 2007, 14 SWS.
Aquakultur II, M.sc., Sommersemester, seit 2007, 42 SWS.
Aquaculture in the tropics and subtropics, M.sc., Sommersemester, seit 2007, 2 SWS.
Global Aquaculture Production, Markets, and Challenges. M.sc., Wintersemester, seit 2010, 38 SWS.
PAG Promotionsstudiengang, Spezielle Züchtungsmethoden bei Fischen, seit 2010, 4 SWS.

Sprachkenntnisse

Englisch fließend, Französisch fortgeschritten, Spanisch fortgeschritten.

Publikationen in referierten Journalen

Wessels S, Sharifi RA, Luehmann LM, Rueangsri S, Krause I, Hörstgen-Schwark, G., Knorr, C. (2014) Allelic Variant in the Anti-Muellerian Hormone Gene Leads to Autosomal and Temperature-Dependent Sex Reversal in a Selected Nile Tilapia Line. PLoS ONE 9(8): e104795. doi:10.1371/journal.pone.0104

Stamer, A., Wessels,S. Neidigk, R., Hoerstgen-Schwark, G. (2014) Black Soldier Fly (Hermetia illucens) larvae-meal as an example for a new feed ingredients?class in aquaculture diets. In Rahmann G. & Askov U. (Eds) (2014) Proceedings of the 4th ISOFAR Scientific Conference. Building Organic Bridges, at the Organic World Congress 2014, 13-15 Oct. Istambul, Turkey (4 pages).

Mruck, H. Wessels, S., Hörstgen-Schwark, G. (2013) Growth of temperature treated phenotypic males, hormone treated phenotypic and genetic males of Nile tilapia (Oreochromis niloticus) in a commercial recirculation system. ISTA 10, 10th International Symposium on Tilapia in Aquaculture, Jerusalem, Oct.6-10, 2013. Book of Abstracts page 160.

D'Cotta, H., Poonlaphdecha, S., Pepey, E., Canonne, M., Wessels, S., Morand, S., Hörstgen-Schwark, G., Baroiller, F. 2013:
A precocious molecular procedure for sexing tilapia., ISTA 10, 10th International Symposium on Tilapia in Aquaculture, Jerusalem, Oct.6-10, 2013. Book of Abstracts page 105.

Franke, R., Wessels, S., Hörstgen-Schwark, G. (2013): Enhancement of survival and growth in crowded groups: the road towards an intensive production of the noble crayfish Astacus astacus L. in indoor recirculation systems. Aquaculture Research 1-
11 (DOI:10.1111/j.1365-2109.2011.03052.x)

Lühmann, L. M., Knorr, C., Hörstgen-Schwark, G., Wessels, S., 2012. First Evidence for Family- Specific QTL for Temperature-Dependent Sex Reversal in Nile Tilapia (Oreochromis niloticus). Sexual development 6, 247-256.

Abozaid, H., Wessels, S., Hörstgen-Schwark, G., 2012. Elevated Temperature Applied during Gonadal Transformation Leads to Male Bias in Zebrafish (Danio rerio). Sexual development 6, 201-209.

Abozaid, H., Wessels, S., Hörstgen-Schwark, G., 2011. Effect of rearing temperatures during embryonic development on the phenotypic sex in zebrafish (Danio rerio). Sexual Development 5, 259-265.

Wessels, S., Samavati, S., Hörstgen-Schwark, G., 2011. Effect of early temperature treatments on sex differentiation in Nile tilapia, Oreochromis niloticus lines selected for high and low thermo-sensitivity. Aquaculture 316, 139-142.

Wessels, S., Hörstgen-Schwark, G., 2011. Temperature dependent sex ratios in selected lines and crosses with a YY-male in Nile tilapia (Oreochromis niloticus). Aquaculture, 318, 79-84.
Franke, R., Wessels, S., Hörstgen-Schwark, G., 2011. Enhancement of survival and growth in crowded groups: the road towards an intensive production of the noble crayfish Astacus astacus L. in indoor recirculation systems. Aquaculture Research. DOI: 10.1111/j.1365-2109.2011.03052.x

Onumah, E. E., Wessels, S., Wildenhayn, N., Bruemmer, B., Hoerstgen-Schwark, G., 2010. Stocking Density and Photoperiod Manipulation in Relation to Estradiol Profile to Enhance Spawning Activity in Female Nile Tilapia. Turkish Journal of Fisheries and Aquatic Sciences, 470, 463-470.

Baroiller, J.-F., DCotta, H., Bezault, E., Wessels, S., Hörstgen-Schwark, G., 2009. Temperature effects on tilapia sex determination. Comparative Biochemistry and Physiology A 153, 30-38.
Wessels, S., Hörstgen-Schwark, G., 2008. Selektionsexperimente zur Erhoehung des Maennchenanteils bei Nilbuntbarschen der Spezies Oreochromis niloticus mittels Temperaturbehandlung, Züchtungskunde, 80 , 67-72.

D'Cotta , H., Pepey, E., Wessels, S., Poonlaphdecha, S. , Reinelt, B., Hörstgen-Schwark, G., Baroiller, J.-F., 2008. Temperature-Induced Male Differentiation in the Nile Tilapia: Gonad Gene Expression Using Female Monosex Populations and Divergent Thermo-Sensitive Lines. Sexual Development, 2(6), 279-289.

Pornsopin, P., Unsrisong G., Vearasilp, T., Wessels, S., Hörstgen-Schwark, G., 2007. Reproductive performance of female rainbow trout Oncorhynchus mykiss (Walbaum) kept under water temperatures and photoperiods of 13 and 51 latitude. Aquaculture Research, 38, 1265-1273.

Wessels, S., Hörstgen-Schwark, G., 2007. Selection experiments to increase the proportion of males in Nile tilapia (Oreochromis niloticus) by means of temperature treatment. Aquaculture, 272, 80-87.






Net Cage

Stephan Wessels's bibliography