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Daniel Merrifield

 

Personal photograph uploaded by Daniel Merrifield

Dr Daniel Merrifield - (D L Merrifield)

  • Job title: Research Fellow, School of Biomedical and Biological Sciences (Faculty of Science and Technology)
  • Address: B406, Portland Square, Drake Circus,
    Plymouth, Devon, PL4 8AA
  • Postal address: A403, Portland Square, Drake Circus,
    Plymouth, Devon, PL4 8AA
  • Telephone: +441752584888
  • Email: daniel.merrifield@plymouth.ac.uk


Role
Research and teaching  

Qualifications & background

PhD -  Evaluation of selected probiotics and bovine lactoferrin as feed supplements for rainbow trout (Oncorhynchus mykiss Walbaum) for applications in aquaculture. The University of Plymouth

PgCert (distinction) - Research Methods. The University of Plymouth  

BSc (Hons; 2:1) - Biological Sciences. The University of Plymouth

 

Professional membership
Aquaculture Nutrition and Health Research Group
Food, Nutrition and Health Research Group
World Aquaculture Society
Society for Applied Microbiology
 

Roles on external bodies

Editorial and referee commitments

Editor-in-Chief for the Journal of Aquaculture Research and Development 

Chief Editor for the Fisheries and Aquaculture Journal

Chief Editor for Special Issue on Probiotics and Prebiotics in Aquaculture, Journal of Aquaculture Research and Development (2011)

Member of the Editorial board for:
            PloS ONE
            Aquaculture Research
            Aquaculture International
            International Aquafeed 
            

Member of the Book Publication Committee for the World Aquaculture Society (2011-present)

Referee for the BBSRC (
Biotechnology and Biological Sciences Research Council)

Referee for the
French National Research Agency (Agence Nationale de la Recherche;
ANR)

Referee for
Superior Council of the National Fund for Scientific & Technological Development (FONDECYT), Chile 

Referee for the National Research Foundation (NRF), South Africa


Referee for the Flanders (Fonds Wetenschappelijk Onderzoek - Vlaanderen, FWO) Research Foundation



Referee for the following journals:

African Journal of Biotechnology
AJP - Regulatory, Integrative and Comparative Physiology
Annals of Microbiology
Antonie van Leeuwenhoek Journal of Microbiology
Archives of Microbiology
Aquaculture
Aquaculture International
Aquaculture Nutrition
Aquaculture Research
British Journal of Nutrition
Chemistry and Ecology
FEMS Microbial Ecology
Fish and Fisheries
Fish Physiology and Biochemistry
Fish and Shellfish Immunology
Genetic Engineering and Biotechnology Journal 
International Research Journal of Microbiology
Journal of Animal Sciences
Journal of Aquatic animal Health
Journal of Fish Biology
Journal of Fish Diseases
Journal of the World Aquaculture Society 
Microbial Cell Factories
Public Library of Science ONE (PLoS ONE)


 


Teaching interests
Topics:
Aquaculture
Gut health and microecology
Aquatic microbiology

Modules:
BIOL107

 


Research interests

Feed additives

Gut health

Alternative protein sources

Probiotics and Prebiotics
 

UoP Research group membership

Centre for Agricultural and Rural Sustainability (CARS) 
Food, Nutrition and Health 

Research degrees awarded to supervised students

 

 

Current

Completions

 

DoS

2nd


PhD

4

10

2

ResM

1

3

 

Masters (MSc/MRes)

3

 1

4


DoS = Director of Studies
2nd = Second supervisor
ResM = Research Masters (2 year research program with minor taught component)
MSc/MRes = 1 year program (taught and research components)


Present Research Team

Dr Ana Rodiles - Post-doc; Probiotics in aquaculture

Ali Abid - PhD student; Microbial populations in the intestinal tract of industrially farmed fish with reference to bacterial probiotics and disease therapy.
(DoS)

Benedict Standen - PhD student; Molecular approaches to understanding the potential of probiotics for fish health and production.
(DoS)

David Peggs - Research Masters (ResM) student; Application of feed additives to reduce enteritis and prevent pathogenic translocation in European sea bass.
(DoS)

Hugo Alexander Jaramillo Torres - PhD student; Probiotics in aquaculture 
(DoS)

Ines Guerreiro - PhD student; Prebiotic applications for Mediterranean fish species
(registered at the Universidad do Porto, with Prof A. Oliva-Teles)

Sam Voller - MRes student; Synbiotic applications for Atlantic salmon

Tamsin Cochrane-Dyet - MSc student; Synbiotic applications for Atlantic salmon


Other postgraduate research students

Holger Kuehlwein - PhD student; Effects β-glucan on growth and gut function of carp.
(with Prof Simon Davies)

Mark Rawling - PhD student; The effect of novel protein sources from biotechnological, plant and insect origins on carp health and production.
(with Prof Simon Davies)


Rebin Akoy - Research Masters (ResM) student; Probiotics in poultry
(with Dr Jane Beal)

Ayub Anwar - Research Masters (ResM) student; Fish nutrition
(with Prof Simon Davies)

Ibrahim Ibrahim - Research Masters (ResM) student; Probiotics in aquaculture
(with Prof Simon Davies)

Rebaz Koy - PhD student; LAB as food preservatives
(with Victor Kuri)



 

Grants & contracts


Total: > £1,000,000

(Studentships, grants, scholarships, commissioned work etc)

Selected:

€5,000 MRes studentship, Phytobiotics GmbH, 2008-2009 
(with Prof. S. Davies)

£45,750 PhD studentship, Ministry of Higher Education and Scientific Research, Iraq 2010-2013 (Ali Abid)
(DoS)


£9,895 awarded under The University of Plymouth’s International Research Networking and Collaboration (IRNC) Scheme, 2010  
(Principal Investigator)

£38,000 Knowledge Transfer Partnership (Ktp) in association with ABAgri, 2010-2011
(with Prof. S. Davies)

£2,500 Lallemand Inc, commissioned work, 2010
(
Principal Investigator)

£62,000 Biomin-PU PhD studentship (50% industry/50% PU) 2011-2014 (Benedict Standen)
(DoS)

$48,500 Novus International, ResM studentship 2011-2013
(David Peggs)
 
(DoS)

£30,500 ResM studentship, Ministry of Higher Education and Scientific Research, Iraq 2011-2013 (Ibrahim Ibrahim) 
(with Prof. S. Davies)

€10,000 Lallemand Inc, commissioned work, 2011
(Principal Investigator)

£1,200 Society for Applied Microbiology, 2011

£54,500 PhD studentship, Ministry of Higher Education and Scientific Research, Iraq 2011-2014 (Rebin Akoy)
(with Dr J. Beal) 

£6,500 MSc studentship, Lallemand Inc., 2011-2012
(DoS)


£30,500
PhD studentship, Ministry of Higher Education and Scientific Research, Iraq 2011-2013 (Ayub Anwar)
(with Prof. S. Davies)

$7,500 Novus International, commissioned work, 2011
(
Principal Investigator)


£28,300 ResM studentship, Ministry of Higher Education and Scientific Research, Iraq 2011-2013 (Payam Sabir)
(with Prof S. Davies) 

£12,500 IRNC-Lallemand Inc. research project, 2011 
(
Principal Investigator)


€80,000 (Plymouth share €37,500) PhD studentship Portuguese Ministry of Science, Technology and Higher Education, 2012-2015 (Ines Guerrero)
(with Prof A. Oliva-Teles, host institution - Universidade do Porto)

$100,000 PhD studentship; LASPAU(COLCIENCIAS)-Lallemand Inc., 2012-2016, (Hugo Alexander Jaramillo Torres)
(DoS)

£15,000 Commissioned work, ABAgri Ltd, 2012
(With Prof S. Davies)

£10,650 Seale-Hayne Educational Trust, 2012-2013


 


Publications

Peer reviewed publications: 

35. Güroy, B., Şahin, I., Kayalı, S., Mantoğlu, S., Canan, B., Merrifield, D. L., Davies, S.J. & Güroy, D. (2012) Evaluation of feed utilization and growth performance of juvenile striped catfish Pangasianodon hypophthalmus fed diets with varying inclusion levels of corn gluten meal. Aquaculture Nutrition accepted

34. Rawling, M. D., Merrifield D. L., Snellgrove D. L., Kühlwein H., Adams A. and Davies S. J. (2012) Haemato-immunological and growth response of mirror carp (Cyprinus carpio) fed a tropical earthworm meal in experimental diets. Fish and Shellfish Immunology, 32, 1002-1007

33. Omar, S.S., Merrifield, D.L.,
Kühlwein, K., Williams, P.E.V., & Davies, S.J. (2012) Biofuel derived yeast protein concentrate (YPC) as a novel feed ingredient in carp diets. Aquaculture, 330-333, 54-62

32.
Gioacchini, G., Giorgini, E., Merrifield, D.L., Hardiman, G., Borini, A., Vaccari, L. & Carnevali O. (2012) Probiotics can induce oocyte maturational competence: the Danio rerio case. Biology of Reproduction, 86(3):65, 1-11

31. Soleimani, N., Hoseinifar, S.H., Merrifield, D.L., Barati, M., & Abadi, Z.H. (2012) Dietary supplementation of fructooligosaccharide (FOS) improves the innate immune response, stress resistance, digestive enzyme activities and growth performance of Caspian roach (Rutilus rutilus) fry. Fish and Shellfish Immunology, 32, 316-321

30. Güroy, D., Şahin, I., Güroy, B., Merrifield, D.L., Bulut, M., & Tekinay, A.A. (2012) Replacement of fishmeal with rice protein concentrate in practical diets for European sea bass Dicentrarchus labrax reared at winter temperatures. Aquaculture Research, early view

29.
Askarian, F., Sperstad, S., Merrifield, D.L., Ray, A.K., and Ringø, E. (2012) The effect of different feeding regimes on enzymatic activities of Atlantic cod (Gadus morhua L.) gut microbiota. Aquaculture Research, early view


28. Güroy, D., Güroy, B., Merrifield, D.L., Tekinay, A.A., Davies, S.J., Şahin, I. (2012) Effects of fish oil and partial fish meal substitution with oilseed oils and meals on growth performance, nutrient utilisation and health of the rainbow trout Oncorhynchus mykiss. Aquaculture International, early view 

27. Kristiansen, M., Merrifield, D.L., Gonzalez Vecino, J.L, Myklebust, R., & Ringø, E. (2011). Evaluation of prebiotic and probiotic effects on the intestinal gut microbiota and histology of Atlantic salmon (Salmo salar L.) Journal of Aquaculture Research and Development, S1:009. doi:10.4172/2155-9546.S1-009

26. Harper, G.M., Monfort, M., Saoud, I.P., Emery, M., Mustafa, S., Rawling, M., Eynon, B., Davies, S.J., & Merrifield, D.L.* (2011) An ex vivo approach to studying the interactions of probiotic Pediococcus acidilactici and Vibrio (Listonella) anguillarum in the anterior intestine of rainbow trout Oncorhynchus mykiss. Journal of Aquaculture Research and Development, S1:004. doi 10.4172/2155-9546.S1-004

25. Gioacchini, G., Lombardo, F., Merrifield, D.L., Silvi, S., Cresci, A., Avella, M.A., &

Carnevali, O. (2011) Effects of Probiotics on Zebrafish Reproduction.
Journal of Aquaculture

Research and Development
, S1:002. doi 10.4172/2155-9546.S1-002

24. Pérez-Sánchez, T, Balcázar, J.L., Merrifield, D. L., Carnevali, O., Gioacchini, G.; de Blas, I., & Ruiz-Zarzuela,  I. (2011) Expression of immune-related genes in rainbow trout (Oncorhynchus mykiss) induced by probiotic bacteria during Lactococcus garvieae infection. Fish and Shellfish Immunology. 31, 196-201

23. Hoseinifar, S. H., Mirvaghefi, A., & Merrifield, D. L. (2011) The effects of dietary inactive brewer's yeast Saccharomyces cerevisiae var. ellipsoideus on the growth, physiological responses and gut microbiota of juvenile beluga (Huso huso). Aquaculture. 318, 90-94.

22. Pérez-Sánchez, T, Balcázar, J.L., García, Y., Halaihel , N., Vendrell, D. , de Blas, I., Merrifield, D. L. & Ruiz-Zarzuela I. (2011) Identification and characterization of lactic acid bacteria isolated from rainbow trout Oncorhynchus mykiss (Walbaum) with inhibitory activity against Lactococcus garvieae. Journal Fish Diseases. 34, 499-507. 

21. Merrifield, D. L.*, Harper, G., Mustafa, S., Carnevali, O., Picchietti, S., Davies, S. J. (2011) Effect of dietary alginic acid on juvenile tilapia (Oreochromis niloticus) intestinal microbial balance, intestinal histology and growth performance. Cell and Tissue Research. 344, 135-146.

20.
Hoseinifar, S. H., Mirvaghefi, A., Amiri, B. M., Rostami, H. K., Merrifield, D. L. (2011) The effects of oligofructose on growth performance, survival and autochthonous intestinal microbiota of beluga (Huso huso) juveniles. Aquaculture Nutrition. 17, 498-504.

19. Guroy, D., Sahin, L., Guroy, B., Altin, A. & Merrifield D. L. Effect of dietary protein levels on growth performance and nitrogen excretion of yellow tail cichlid Pseudotropheus acei. The Isreali Journal of Aquaculture - Bamidgeh. in press

18. Güroy, D., Güroy, B., Merrifield, D. L., Ergün, S., Tekinay, A. & Yiğit, M. (2011) Effect of dietary Ulva and Spirulina on weight loss and body composition of rainbow trout, Oncorhynchus mykiss (Walbaum), during starvation period. Journal of Animal Physiology and Animal Nutrition. 95, 320-327.

17.
Hoseinifar, S. H., Mirvaghefi, A., Merrifield, D. L., Amiri B. M. & Bastami K. D. (2011) The study of some haematological and serum biochemical parameters of juvenile beluga (Huso huso) fed oligofructose. Fish Physiology and Biochemistry. 37, 91-96

16. Dimitroglou, A., Merrifield, D. L.*, Carnevali, O., Picchietti, S., Avella, M., Daniels, C. L., Güroy, D., Davies, S. J. (2011) Microbial manipulations to improve fish health and production - a Mediterranean perspective. Fish and Shellfish Immunology, 30, 1-16. 

15. Merrifield, D. L.*, Bradley, G., Harper, G., Baker, R. T. M., Munn, C. B. & Davies, S. J. (2011) Assessment of the effects of vegetative and lyophilised Pediococcus acidilactici on growth, feed utilisation, intestinal colonisation and health parameters of rainbow trout (Oncorhynchus mykiss Walbaum). Aquaculture Nutrition, 17, 73-79

14. Daniels, C. L., Merrifield, D. L, Boothroyd, D. P., Davies, S. J., Factor, J. R. & Arnold, K. E. (2010) Effect of dietary Bacillus spp. and mannan oligosaccharides (MOS) on European lobster (Homarus gammarus L.) larvae growth performance, gut morphology and gut microbiota. Aquaculture, 304, 49-57. 

13. Merrifield, D. L.*, Dimitroglou, A., Foey, A., Davies, S. J., Baker, R. T. M., Bøgwald, J., Castex, M. & Ringø, E., (2010) The current status and future focus of probiotic and prebiotic applications for salmonids. Aquaculture, 302, 1-18.

12. Ferguson R. M. W., Merrifield, D. L.*, Harper, G. M., Rawling, M. D., Mustafa, S., Picchietti, S., Balcázar, J. L. &. Davies S. J. (2010) The effect of Pediococcus acidilactici on the gut microbiota and immune status of on-growing red tilapia (Oreochromis niloticus). Journal of Applied Microbiology, 109, 851-862.

11. Merrifield, D. L.*, Davies, S. J., Güroy, D., Güroy, B., Emery, M.J., Llewellyn, C. & Skill, S. (2010) Assessment of Chlorogloeopsis as a dietary supplement for red tilapia (Oreochromis niloticus). Aquaculture, 299, 128-133.

10. Dimitroglou, A., Merrifield, D. L., Spring, P., Sweetman, J., Moate, R. & Davies, S. J.,  (2010) Effects of dietary mannan oligosaccharides (MOS) and soybean meal on growth performance, feed utilisation, intestinal histology and gut microbiota of gilthead sea bream (Sparus aurata). Aquaculture, 300, 182-188

9. Merrifield, D. L.*, Bradley, G., Baker, R. T. M., Dimitroglou, A. & Davies, S. J. (2010) Probiotic applications for rainbow trout (Oncorhynchus mykiss Walbaum) I. Effects on growth performance, feed utilisation, intestinal microbiota and related health criteria. Aquaculture Nutrition, 16, 504-510.

8. Merrifield, D. L.*, Bradley, G., Baker, R. T. M., & Davies, S. J. (2010) Probiotic applications for rainbow trout (Oncorhynchus mykiss Walbaum) II. Effects on growth performance, feed utilisation, intestinal microbiota and related health criteria post antibiotic treatment. Aquaculture Nutrition, 16, 496-503.

7. Merrifield, D. L.*, Harper, G. M., Dimitroglou, A., Ringø, E. & Davies, S. J. (2010) Possible influence of probiotic adhesion to intestinal mucosa on the activity and morphology of rainbow trout (Oncorhynchus mykiss) enterocytes. Aquaculture Research, 41, 1268-1272.

6. Hoseinifar, S. H., Zare, P. & Merrifield, D. L. (2010) The effects of inulin on growth factors and survival of the Indian white shrimp larvae and post-larvae (Fenneropenaeus indicus). Aquaculture Research, 41, e348-e352.

5. Merrifield, D. L.*, Burnard, D., Bradley, G., Davies S. J. & Baker R. T. M. (2009) Microbial community diversity associated with the intestinal mucosa of farmed rainbow trout (Oncoryhnchus mykiss Walbaum). Aquaculture Research 40, 1064-1072.

4. Merrifield, D. L.*, Bradley, G., Baker, R. T. M., Dimitroglou, A. & Davies, S. J. (2009) Soybean meal alters autochthonous microbial populations, microvilli morphology and compromises intestinal enterocyte integrity of rainbow trout (Oncorhynchus mykiss Walbaum). Journal Fish Diseases 32, 755-766.

3. Rawling, M., Merrifield, D. L. & Davies, S. J. (2009) Preliminary assessment of dietary supplementation of Sangrovit® on red tilapia (Oreochromis niloticus) growth performance and  health. Aquaculture 294, 118-122.

2. Dimitroglou, A., Merrifield, D. L., Moate, R., Davies, S.J., Spring, P., Sweetman, J., Bradley, G., (2009) Dietary mannan oligosaccharide supplementation modulates intestinal microbial ecology and improves gut morphology of rainbow trout, Oncorhynchus mykiss (Walbaum).Journal of Animal Science 87, 3226-3234

1. Ergün, S., Soyutürk, M., Güroy, B., Güroy, D. & Merrifield, D. L. (2009) Influence of Ulva meal on growth, feed utilization and body composition of juvenile Nile Tilapia (Oreochromis niloticus) at two levels of dietary lipid. Aquaculture International 17, 355-361.


Book contributions:

Probiotics, Prebiotics and Gut Health in Aquaculture Nutrition (Eds. Merrifield D. L. & Ringø E.) Wiley-Blackwell, in prep, contractual agreement for publication in early 2012.

Merrifield D. L., Olsen R. E., Myklebust, R. & Ringø E. Dietary effect of soybean products on gut histology and microbiota of fish. Chapter 12, In Soybean and Nutrition ISBN 978-953-307-536-5 (Ed. El-Shemy H.). InTech

 


Non-peer reviewed publications: 

6. Merrifield, D. L.* Probiotics and Prebiotics In Aquatic Animals. Global Aquaculture Advocate January/February 2012 pp 42-43

5. Rawling, M. D & Merrifield, D. L. Are immunostimulants the future defence against disease? Asian Aquaculture, The Practical. Vol. 2, Issue 7, July-Sept 2011, pp 12-13.

4. Harper G. M., Dimitroglou A., Ringø E. & Merrifield D. L.* Electron microscopy: an important tool to assess the effects of dietary components on the gastrointestinal tract of fish. Asian Aquaculture, The Practical. Vol. 2, Issue 1, Jan-March 2011, pp 22-24.

3. Merrifield, D. L.* & Emery, M. J. The probiotic approach to elevating the health of fish. International Aquafeed. Vol. 13, Issue 4, July-Aug 2010, pp 36-38.

2. Merrifield, D. L.* & Daniels, C. Improving larval mariculture by ensuring microbial control of live feeds. Asian Aquaculture, The Practical. Vol. 1, Issue 3, July-Sept 2010, pp 12-13. 

1. Merrifield, D. L.* Probiotics in aquaculture: transferring scientific knowledge to practical applications. Asian Aquaculture, The Practical. Vol. 1, Issue 2, Apr-Jun 2010, pp 20-22.

 

Conference and meeting contributions:

22. M. D. Rawling, D. L. Merrifield, D. L. Snellgrove, H. Kühlwein, A. Adams and S. J. Davies (2012) Haemato-immunological and growth response of mirror carp (Cyprinus carpio) fed a tropical earthworm meal in experimental diets. Aquaculture America 2012, Feb 28th-March 3rd, Las Vegas, USA

21. Holger Kühlwein, Christyn J Bailey, Catherine Mead, Matthew J Emery, Simon J Davies, Daniel L Merrifield and Theodore Henry (2012) Effects of dietary β-glucan on zebrafish Danio rerio mycobacteriosis. Aquaculture America 2012, Feb 28th-March 3rd, Las Vegas, USA

20.  Harper, G.M., Monfort, M., Saoud, I.P., Abid, A., Emery, M., Mustafa, S., Rawling, M., Eynon, B., Davies, S.J., & Merrifield, D.L.* (2011) An ex vivo approach to studying the interactions of probiotic Pediococcus acidilactici and Vibrio (Listonella) anguillarum in the anterior intestine of rainbow trout Oncorhynchus mykiss. Aquaculture Europe 2011, October 19th-21st, Rodos, Greece

19. Giorgia Gioacchini, Elisabetta Giorgini, Daniel L. Merrifield, Gary Hardiman, Andrea Borini, Lisa Vaccari, Oliana Carnevali. Probiotics induce oocyte maturational competence in Danio rerio. Aquaculture Europe 2011, October 19th-21st, Rodos, Greece


18. Handy, R.D., Merrifield, D.L., Shaw, B.J., Harper, G.M., Saoud, I.P., Davies, S.J. & Henry, T.B.
2011. Ingestion of food containing metal nanoparticles disrupts endogenous microbiota in zebrafish with potential implications on organism health. 6th International Conference on the
Environmental Effects of Nanoparticles and Nanomaterials,
Sept 19th-21st, London, UK.


17. Merrifield*, D. L. 2011 - Gut microbes, feed additives and immunostimulants in fish. Immunostimulants workshop, 15th International Conference on Disease and Shellfish, European Association of Fish Pathologists, Sept 12th-16th, Split, Croatia. Invited
 Immunostimulants workshop speaker

16. Kuhlwein, H., Merrifield, D.L., Rawling, M.D. & Davies, S.J. 2011. B-glucan effects on growth, haematological indices and intestinal integrity of mirror carp (Cyprinus carpio L.). 15th International Conference on Disease of Fish and shellfish, European Association of Fish Pathologists, Sept 12th-16th, Split, Croatia


15. Gioacchini, G., Giorgini, E., Merrifield, D. L., Hardiman, G., Borini, A., Vaccari, L., Carnevali, O. 2011. Probiotics induce oocyte maturational competence in Danio rerio. 3rd International workshop on the Biology of Fish Gametes, Sept 7th-9th, Budapest, Hungary

14. Merrifield*, D.L. & Davies, S.J. 2011 – Yeast and yeast derivatives in aquafeeds. ABAgri-UoP Ktp workshop, August 25th, Peterborough, UK

13. Merrifield*, D. L. 2011 – Probiotics in aquaculture. 1st Biomin Aquadays 2011, July-12th-15th. Tuln, Austria
Invited speaker

12. Merrifield*, D. L. 2011 – Gut microbes, probiotics and prebiotics in fish. World Aquaculture 2011, June 6th-10th, Natal, Brazil
Invited plenary speaker for the probiotics and prebiotics session.

11. Omar, S., Merrifield, D.L., Davies, S.J. & Williams, P. 2011 - Efficacy of a bioethanol refinery derived yeast protein concentrate in aquafeeds. Centre for Research in Translational Biomedicine (CRTB) research day, April 5th, The University of Plymouth, Plymouth, UK.

10. Rawling, M. D., Merrifield, D. L. & Davies, S. J. 2011 - Preliminary assessment of dietary supplementation of Sangrovit® on red  tilapia (Oreochromis niloticus) growth performance and health. Centre for Research in Translational Biomedicine (CRTB) research day, April 5th, The University of Plymouth, Plymouth, UK.

9. Kühlwein, H., Merrifield, D. L., Rawling, M. D., & Davies S. J. 2011 - Effects of β-glucan on growth and haematological indices of carp (Cyprinus carpio L.). Centre for Research in Translational Biomedicine (CRTB) research day, April 5th, The University of Plymouth, Plymouth, UK.

8. Merrifield, D. L.*, Ferguson, R. M. W., Harper, G. M., Rawling, M. D., Mustafa, S., Picchietti, S., Balcázar J. L. & Davies S. J. 2010 - The effect of dietary Pediococcus acidilactici (Bactocell®) on tilapia (Oreochromis niloticus). Aquaculture Europe 2010, October 5th -8th, Porto, Portugal. 

7. Omar, S., Merrifield, D.L., Davies, S.J. & Williams, P. 2010 - Efficacy of a bioethanol refinery derived yeast protein concentrate in aquafeeds. Aquaculture Europe 2010, October 5th -8th, Porto, Portugal.

6. Sweetman, J. & Merrifield, D. L.* 2010 - Microbial dietary supplements for rainbow trout aquaculture. Aquaculture UK 2010, May 19-20th, Aviemore, Scotland 

5. Rawling, M. D., Merrifield, D. L. & Davies, S. J. 2010 - Preliminary assessment of dietary supplementation of Sangrovit® on red  tilapia (Oreochromis niloticus) growth performance and health. 11th Fish Immunology Workshop April 12th-15th, Wageningen University, Wageningen, The Netherlands

4. Daniels, C. L., Merrifield, D. L., Davies, S. J. & Boothroyd, D. 2010 - Investigating the application of dietary biotic supplements in Homarid lobster culture. Aquaculture 2010, March 1st-5th, 2010, San Diego, CA, USA 

3. Sweetman J. W., Dimitroglou, A., Merrifield, D. L., Moate, R., Davies, S. J., Spring, P. & Bradley, G. 2010 - Dietary mannan oligosaccharide supplementation modulates intestinal microbial ecology and improves gut morphology of rainbow trout Oncorhynchus mykiss. Aquaculture 2010, March 1st-5th, 2010, San Diego, CA, USA

2. Merrifield, D. L.*, Burnard, D., Bradley, G. & Davies, S. J. 2007 - A comparison of the gut microbial populations associated with rainbow trout (Oncorhynchus mykiss) at two fish farms. Aquaculture Europe 2007, October 24th -27th, Istanbul, Turkey.

1. Merrifield, D. L.*, Dimitroglou, A., Bradley, G. & Davies, S. J. 2006 - The effect of partial fishmeal replacement with soya bean on rainbow trout gut microflora: XII International Symposium on Fish Nutrition and Feeding, May 28th – June 1st, 2006, Biarritz, France

 

Reports & invited lectures

Gut microbes, feed additives and immunostimulants in fish. Immunostimulants workshop, 15th International Conference on Disease and Shellfish, European Association of Fish Pathologists, Sept 12th-16th, Split, Croatia

Probiotics in aquaculture. 1st Biomin Aquadays 2011, July-12th-15th. Tuln, Austria

World Aquaculture 2011 Invited plenary speaker for the probiotic and prebiotic session. WAS, Natal, Brazil 2011

Probiotics in aquaculture, invited lecture Oct 2008, Canakkale Onsekiz Mart University, Department of Aquaculture, Canakkale, Turkey