Klaus Knopf

PD Dr.

Klaus Knopf

Research Group Leader

Department

(Dept. 4) Fish Biology, Fisheries and Aquaculture

klaus.knopf@igb-berlin.de

Phone

+49 30 64181-637

Room

414

Müggelseedamm 310, 12587 Berlin

Profile

Research group

Fish Parasitology and Immunology

Expertise

experimental parasitology, fish immunology, parasite ecology

since 2000 research scientist at the Leibniz-Institute of Freshwater Ecology and Inland Fisheries
2008 Habilitation in Zoology / Fish Parasitology, Humboldt-University of Berlin
1999 PhD thesis, University Karlsruhe (TH)
1994 Diploma thesis in biology, University Freiburg/Br.

Publications

2025

July 2025

Viola Schöning; Janne Roos Irmler; Christopher Shaw; Klaus Knopf

Optimised preparation of fish tissue samples for the determination of fatty acids by gas chromatography-mass spectrometry

Bulletin of the EAFP. - 44(2025)3, XX-XX

July 2025

Claudina Mata-Marcano; Matthias Stöck; Klaus Knopf

Morphological and molecular assessment of muscle metacercariae infecting tench Tinca tinca from fish farms and wild populations in Germany

Scientific Reports. - 15(2025), Art. 23700

http://dx.doi.org/10.1038/s41598-025-09396-y

2024

February 2024

Shaw, Christopher; Knopf, Klaus; Roy, Koushik; Ulrichs, Christian; Kloas, Werner

Animal versus plant protein sources in marine ingredient-free aquaponic diets: A case study on nutrient release, and retention of African catfish (Clarias gariepinus) reared in RAS

Aquaculture. - 584(2024), Art. 740641

http://dx.doi.org/10.1016/j.aquaculture.2024.740641

2023

January 2024

Fabian J. Schäfer; Jörn Gessner; Werner Kloas; Klaus Knopf; Thomas Meinelt; Hendrik Monsees; Christopher Shaw

Gegen den Strom - Aquakultur in Deutschland

Zeitschrift für Fischerei. - 3(2023), Art. 10, 1-10.

http://dx.doi.org/10.35006/fischzeit.2023.32

May 2023

Christopher Shaw; Klaus Knopf; Laura Klatt; Gabina Marin Arellano; Werner Kloas

Closing Nutrient Cycles through the Use of System-Internal Resource Streams: implications for Circular Multitrophic Food Production Systems and Aquaponic Feed Development

Sustainability. - 15(2023)9, Art. 7374

http://dx.doi.org/10.3390/su15097374

March 2023

Werner Kloas; Klaus Knopf; Laura Klatt; Alaa Osman; Radek Gebauer; Andrea Zikova-Kloas; Christopher Shaw

Aquaponics - combining sustainability and resilience f or a reliable food security

Innowacje w gospodarce rybackiej. (2023), S. 107-120

February 2023

Radek Gebauer; Anneliese Brügmann; Ewumi Azeez Folorunso; Tobias Goldhammer; Tatyana Gebauer; Viola Schöning; Sandra Bittmann; Klaus Knopf; Jan Mráz; Werner Kloas

Species- and diet-specific aquaculture wastewater nutrient profile: implications for aquaponics and development of sustainable aquaponics diet

Aquaculture. - 568(2023), Art. 739307

http://dx.doi.org/10.1016/j.aquaculture.2023.739307

2022

December 2022

Christopher Shaw ... Klaus Knopf ... Werner Kloas

Toward feeds for circular multitrophic food production systems: holistically evaluating growth performance and nutrient excretion of african catfish fed fish meal-free diets in comparison to nile tilapia

Sustainability. - 14(2022)21, Art. 14252

http://dx.doi.org/10.3390/su142114252

April 2022

Thora Lieke; Christian E.W. Steinberg; Thomas Meinelt; Klaus Knopf; Werner Kloas

Modification of the chemically induced inflammation assay reveals the Janus face of a phenol rich fulvic acid

Scientific Reports. - 12(2022), Art. 5886

http://dx.doi.org/https://doi.org/10.1038/s41598-022-09782-w

March 2022

Christopher Shaw; Klaus Knopf; Werner Kloas

Fish feeds in aquaponics and beyond: a novel concept to evaluate protein sources in diets for circular multitrophic food production systems

Sustainability. - 14(2022)7, Art. 4064

http://dx.doi.org/10.3390/su14074064

2021

July 2021

Franziska Kupprat; Franz Hölker; Klaus Knopf; Torsten Preuer; Werner Kloas

Innate immunity, oxidative stress and body indices of Eurasian perch Perca fluviatilis after two weeks of exposure to artificial light at night

Journal of Fish Biology. - 99(2021)1, 118-130

http://dx.doi.org/10.1111/jfb.14703

July 2021

Thora Lieke; Christian E.W. Steinberg; Sandra Bittmann; Sascha Behrens; Seyed H. Hoseinifar; Thomas Meinelt; Klaus Knopf; Werner Kloas

Fulvic acid accelerates hatching and stimulates antioxidative protection and the innate immune response in zebrafish larvae

Science of the Total Environment. - 796(2021), Art. 148780

http://dx.doi.org/10.1016/j.scitotenv.2021.148780

May 2021

Seraina E. Bracamonte; Klaus Knopf; Michael T. Monaghan

Encapsulation of Anguillicola crassus reduces the abundance of adult parasite stages in the European eel (Anguilla anguilla)

Journal of Fish Diseases. - 44(2021)6, 771-782

http://dx.doi.org/10.1111/jfd.13301

April 2021

Jenny C. Vivas Muñoz; Christian K. Feld; Sabine Hilt; Alessandro Manfrin; Milen Nachev; Daniel Köster; Maik A. Jochmann; Torsten C. Schmidt; Bernd Sures; Andrea Ziková; Klaus Knopf

Eye fluke infection changes diet composition in juvenile European perch (Perca fluviatilis)

Scientific Reports. - 11(2021), Art. 3440

http://dx.doi.org/10.1038/s41598-021-81568-y

January 2021

Thora Lieke; Christian E. W. Steinberg; Bo Pan; Irina V. Perminova; Thomas Meinelt; Klaus Knopf; Werner Kloas

Phenol-rich fulvic acid as a water additive enhances growth, reduces stress, and stimulates the immune system of fish in aquaculture

Scientific Reports. - 11(2021), Art. 174

https://doi.org/10.1038/s41598-020-80449-0

2020

December 2020

Redaktion: Johannes Graupner; Verantwortliche Autoren: Jörn Gessner; Werner Kloas; Klaus Knopf; Klaus Kohlmann; Thomas Meinelt; Hendrik Monsees; Fabian Schäfer; Georg Staaks

Nachhaltige Aquakultur in Deutschland - Chancen und Herausforderungen: IGB Policy Brief

http://dx.doi.org/https://dx.doi.org/10.4126/FRL01-006422718

2019

December 2019

Seraina E. Bracamonte; Paul R. Johnston; Michael T. Monaghan; Klaus Knopf

Gene expression response to a nematode parasite in novel and native eel hosts

Ecology and Evolution. - 9(2019)23, S. 13069-13084

http://dx.doi.org/10.1002/ece3.5728

https://repository.publisso.de/resource/frl%3A6419034

November 2019

Seraina E. Bracamonte; Paul R. Johnston; Klaus Knopf; Michael T. Monaghan

Experimental infection with Anguillicola crassus alters immune gene expression in both spleen and head kidney of the European eel (Anguilla anguilla)

Marine Genomics. - 45(2019), S. 28-37

http://dx.doi.org/10.1016/j.margen.2018.12.002

https://repository.publisso.de/resource/frl%3A6419132

September 2019

Jenny Carolina Vivas Munoz; David Bierbach; Klaus Knopf

Eye fluke (Tylodelphys clavata) infection impairs visual ability and hampers foraging success in European perch

Parasitology Research. -118(2019)9, S. 2531-2541

http://dx.doi.org/10.1007/s00436-019-06389-5

July 2019

Nora Baberschke; Laura Schulzik; Torsten Preuer; Klaus Knopf; Thomas Meinelt; Werner Kloas

Potash mining effluents and ion imbalances cause transient stress in adult common roach, Rutilus rutilus

Ecotoxicology and Environmental Safety. - 180(2019)S. 733-741

http://dx.doi.org/10.1016/j.ecoenv.2019.05.069

https://repository.publisso.de/resource/frl%3A6415616

2018

January 2019

Jenny Carolina Vivas Munoz; Sabine Hilt; Petr Horak; Klaus Knopf

Impact of trematode infections on periphyton grazing rates of freshwater snails

Parasitology Research. -117(2018)11, S. 3547-3555

http://dx.doi.org/10.1007/s00436-018-6052-y

September 2018

K. Knopf; K. Buschmann; M. Hansel; J. Radinger; W. Kloas

Flash photography does not induce stress in the Ram cichlid Mikrogeophagus ramirezi (Myers &Harry, 1948) in aquaria

Journal of Applied Ichthyology. - 34(2018)4, S. 922-928

http://dx.doi.org/10.1111/jai.13673

2017

October 2017

C. Cobo Labarca; J. Radinger; V. Schöning; R. Ariav; R. Jung; K. D. Thompson; W. Kloas; K. Knopf

Application of low-frequency sonophoresis and reduction of antibiotics in the aquatic systems

Journal of Fish Diseases. - 40(2017)11, S. 1635-1643

http://dx.doi.org/10.1111/jfd.12631

September 2017

Jeny Carolina Vivas Munoz; Georg Staaks; Klaus Knopf

The eye fluke Tylodelphys clavata affects prey detection and intraspecific competition of European perch (Perca fluviatilis)

Parasitology Research. -116(2017)9, S. 2561-2567

http://dx.doi.org/10.1007/s00436-017-5564-1

January 2017

Gregor Kalinkat; Juliano S. Cabral; William Darwall; G. Francesco Ficetola; Judith L. Fisher; Darren P. Giling; Marie-Pierre Gosselin; Hans-Peter Grossart; Sonja C. Jähnig; Jonathan M. Jeschke; Klaus Knopf; Stefano Larsen; Gabriela Onandia; Marlene Paetzig; Wolf-Christian Saul; Gabriel Singer; Erik Sperfeld; Ivan Jaric

Flagship umbrella species needed for the conservation of overlooked aquatic biodiversity

Conservation Biology. - 31(2017)2, S. 481-485

http://dx.doi.org/10.1111/cobi.12813

https://repository.publisso.de/resource/frl%3A6403316

2015

February 2015

Cristobal Cobo Labarca; Mary Makhutu; Alexander E. Lumsdon; Kim D. Thompson; Rainer Jung; Werner Kloas; Klaus Knopf

The adjuvant effect of low frequency ultrasound when applied with an inactivated Aeromonas salmonicida vaccine to rainbow trout (Oncorhynchus mykiss)

Vaccine. - 33(2015)11, S. 1369-1374

http://dx.doi.org/10.1016/j.vaccine.2015.01.027

2014

December 2014

Sebastian Emde; Sonja Rueckert; Judith Kochmann; Klaus Knopf; Bernd Sures; Sven Klimpel

Nematode eel parasite found inside acanthocephalan cysts - a "Trojan horse" strategy?

Parasites & Vectors. - 7(2014)504

http://dx.doi.org/10.1186/s13071-014-0504-8

March 2014

Cristobal Cobo; Katarzyna Makosch; Rainer Jung; Klaus Kohlmann; Klaus Knopf

Enhanced Aeromonas salmonicida bacterin uptake and side effects caused by low frequency sonophoresis in rainbow trout (Oncorhynchus mykiss)

Fish & Shellfish Immunology. - 36(2014)2, S. 444-452

http://dx.doi.org/10.1016/j.fsi.2013.12.010

2013

November 2013

Cristobal Cobo; Katarzyna Makosch; Rainer Jung; Klaus Knopf

Ultrasound-mediated immersion vaccination of rainbow trout (Oncorhynchus mykiss)

Fischkrankheiten im Spannungsfeld Wirt-Erreger-Umwelt / EAFP. - Hannover. - S. 191-195

November 2013

Klaus Knopf; Christoph Steinbach; Jürgen Schreiber

Effekt von Dikerogammarus villosus auf die Parasitenfauna von Flussbarschen (Perca fluviatilis)

Fischkrankheiten im Spannungsfeld Wirt-Erreger-Umwelt / EAFP. - Hannover. - S. 153-160

November 2013

Amir Abbas Bazyar Lakeh; Rainer Jung; Ra'anan Ariav; Werner Kloas; Thomas Meinelt; Klaus Knopf

Niederfrequenter Ultraschall und UV-C zur Abtötung von Parasiten und zur Keimreduktion in Kreislaufanlagen

Fischkrankheiten im Spannungsfeld Wirt-Erreger-Umwelt / EAFP. - Hannover. - S. 123-129

June 2013

Amir Abbas Bazyar Lakeh; Werner Kloas; Rainer Jung; Ra'anan Ariav; Klaus Knopf

Low frequency ultrasound and UV-C for elimination of pathogens in recirculating aquaculture systems

Ultrasonics Sonochemistry. - 20(2013)5, S. 1211-1216

http://dx.doi.org/10.1016/j.ultsonch.2013.01.008

2009

March 2010

K. Knopf; N. Neumann; C. Pietsch; W. Kloas; H. Kürzinger; B. B. ter Höfte; G. Großheider

Suche nach einem alternativem Fischmodell für Wirksamkeitsuntersuchungen immunstimulierender Futteradditive

Der Weg zum gesunden Fisch / Dirk Willem Kleingeld u. Dieter Steinhagen (Hrsg.). - Hannover, 2009. - S. 219-226

January 2010

Constanze Pietsch; Nadja Neumann; Klaus Knopf; Sven Wuertz; Werner Kloas

Progestogens cause immunosuppression of stimulated carp (Cyprinus carpio L.) leukocytes in vitro

Comparative biochemistry and physiology C. - 150(2009)1, S. 16-24

http://dx.doi.org/10.1016/j.cbpc.2009.02.003

2008

April 2011

K. Knopf; R. Lucius

Vaccination of eels (Anguilla japonica and Anguilla anguilla) against Anguillicola crassus with irradiated L3

Parasitology. - 135(2008)5, S. 633-640

http://dx.doi.org/10.1017/S0031182008004162

August 2008

K. Knopf; A. Madriles Helm; R. Lucius; W. Bleiss; H. Taraschewski

Migratory response of European eel (Anguilla anguilla) phagocytes to the eel swimbladder nematode Anguillicola crassus

Parasitology research. - 102(2008)6, S. 1311-1316

http://dx.doi.org/10.1007/s00436-008-0910-y

2007

April 2008

Constanze Pietsch; Günter Kotterba; Klaus Knopf; Nadja Neumann; Werner Kloas

Immunmodulationen beim Karpfen durch Sexualsteroide

Gesunde Fische überall / EAFP. - Bern, 2007. - S. 1-5

April 2008

Klaus Knopf; Anna Madriles Helm

Anguillicola crassus im Europäischen Aal und im Japanischen Aal

Gesunde Fische überall / EAFP. - Bern, 2007. - S. 1-8

March 2008

Klaus Knopf; Antje Krieger; Franz Hölker

Parasite community and mortality of overwintering young-of-the-year roach (Rutilus rutilus)

Journal of parasitology. - 93(2007)5, S. 985-991

2006

July 2018

K. Knopf

The swimbladder nematode Anguillicola crassus in the European eel Anguilla anguilla and the Japanese eel Anguilla japonica: differences in susceptibility and immunity between a recently colonized host and the original host

Journal of Helminthology. - 80(2006)2, S. 129-136

http://dx.doi.org/10.1079/JOH2006353

2005

December 2005

H. Taraschewski; J. Boomker; K. Knopf; F. Moravec

Anguillicola papernai (Nematoda: Anguillicolidae) and other helminths parasitizing the African longfin eel Anguilla mossambica

Diseases of aquatic organisms. - 63(2005), S. 185-195

http://dx.doi.org/10.3354/dao063185

December 2005

Klaus Knopf; Franz Hölker

First report of Philometra obturans (Nematoda) and Neoergasilus japonicus (Copepoda) in Germany

Acta parasitologica. - 50(2005)3, S. 261-262

2004

April 2012

Klaus Knopf

Parasiten bedrohen den Europäischen Aal

Brandenburger Agrar- und Umwelt-Journal. - 17(2004) S. 15-16

August 2008

Bernd Sures; Klaus Knopf

Parasites as a threat to freshwater eels?

Science. - 304(2004)5668, S. 208-209

http://dx.doi.org/10.1126/science.304.5668.209

November 2004

K. Knopf; M. Mahnke

Differences in susceptibility of the European eel (Anguilla anguilla) and the Japanese eel (Anguilla japonica) to the swim-bladder nematode Anguillicola crassus

Parasitology. - 129(2004)4, S. 491-496

http://dx.doi.org/10.1017/S0031182004005864

September 2004

A. P. Ekanem; T. Meinelt; W. Kloas; K. Knopf

Early life stage toxicity of extracts from the african fish poison plants Tephrosia vogelii Hook. f. and Asystasia vogeliana Benth. on zebrafish embryos

Journal of fish biology. - 65(2004)2, S. 489-494

http://dx.doi.org/10.1111/j.1095-8649.2004.00464.x

June 2004

Thomas Meinelt; Kurt Schreckenbach; Klaus Knopf; Andreas Wienke; Angelika Stüber; Christian E. W. Steinberg

Humic substances affect physiological condition and sex ratio of swordtail (Xiphophorus helleri Heckel)

Aquatic sciences. - 66(2004)2, S. 239-245

http://dx.doi.org/10.1007/s00027-004-0706-9

June 2004

B. Sures; K. Knopf

Individual and combined effects of cadmium and 3,3', 4,4',5-pentachlorobiphenyl (PCB 126) on the humoral immune response in European eel (Anguilla anguilla) experimentally infected with larvae of Anguillicola crassus (Nematoda)

Parasitology. - 128(2004)4, S. 445-454

http://dx.doi.org/10.1017/S003118200300475X

April 2004

A. P. Ekanem; A. Obiekezie; W. Kloas; K. Knopf

Effects of crude extracts of Mucuna pruriens (Fabaceae) and Carica papaya (Caricaceae) against the protozoan fish parasite Ichthyophthirius multifiliis

Parasitology research. - 92(2004)5, S. 361-366

http://dx.doi.org/10.1007/s00436-003-1038-8

2001

August 2008

B. Sures; K. Knopf; W. Kloas

Induction of stress by the swimbladder nematode Anguillicola crassus in European eels, Anguilla anguilla, after repeated experimental infection

Parasitology. - 123(2001)2, S. 179-184

http://dx.doi.org/10.1017/S003118200100823X

2000

March 2002

K. Knopf; K. Naser; M. H. T. van der Heijden; H. Taraschewski

Evaluation of an ELISA and immunoblotting for studying the humoral immune response in Anguilla crassus infected European eel Anguilla anguilla

Diseases of aquatic organisms. - 43(2000)1, S. 39-48

http://dx.doi.org/10.3354/dao043039

October 2001

K. Knopf; K. Naser; M. H. T. van der Heijden; H. Taraschewski

Humoral immune response of European eel Anguilla anguilla experimentally infected with Anguillicola crassus

Diseases of aquatic organisms. - 42(2000)1, S. 61-69

http://dx.doi.org/10.3354/dao042061