Prof. Nazlı DEMİREL EROL

Metrics

Publication

Citation (WoS)

1217

H-Index (WoS)

Citation (Scopus)

1304

H-Index (Scopus)

Citation (Scholar)

2427

H-Index (Scholar)

Project

Thesis Advisory

Open Access

UN Sustainable Development Goals

Biography

I am a marine biologist specializing in fisheries and ecosystem management. I earned my PhD in marine science from Istanbul University in 2010 and later gained valuable experience in fisheries conservation as a visiting scholar at GEOMAR in Kiel, Germany. With over 20 years of experience, I have worked as a project coordinator, consultant, and expert on various fisheries management and ecosystem conservation projects at both national and international levels.

Since 2015, I have been a senior researcher at the Institute of Marine Sciences and Management at Istanbul University. My research focuses on ecosystem changes driven by fishing impacts and environmental conditions. I have a strong interest in applying the ecosystem approach to fisheries to enhance management practices.

Education

2004 - 2010

Doctorate

Istanbul University, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü, Turkey

2001 - 2004

Postgraduate

Istanbul University, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü, Turkey

1997 - 2001

Undergraduate

Istanbul University, Su Ürünleri Fakültesi, Turkey

Research Areas

Fisheries

Marine Biology

Biological Oceanography

Academic Positions

2022 - Continues

Professor

Istanbul University, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü

2016 - 2022

Associate Professor

Istanbul University, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü

2010 - 2013

Research Assistant PhD

Istanbul University, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü

2001 - 2010

Research Assistant

Istanbul University, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü

Non Academic Experience

2024 - Continues

Coordinating Lead Author

Non-profit Organisation, Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), Methodological Assessment on Monitoring Biodiversity and Nature’s Contributions to People, Coordinating Lead Author

2020 - 2020

BlackSea4Fish Project Coordinator

United Nations, Food and Agricultural Organization (FAO), General Fisheries Commission for the Mediterranean (GFCM), BlackSea4Fish Project Coordinator

2013 - 2015

Visiting researcher

University, GEOMAR Helmholtz Centre for Ocean Research Kiel, Evolutionary Ecology of Fishes, Visiting researcher

Courses

Doctorate

Balık Biyoçeşitliliği

Postgraduate

Sayısal Ekoloji

Supervised Theses

in Progress

Doctorate

Seasonal vertical distribution and impact of climate change on size variations of zooplankton in the Sea of Marmara

Demirel N. (Advisor)

D.Bedikoğlu(Student)

2020

Postgraduate

Reproduction strategy of dominant Cladocera species of the Sea of Marmara

Demirel N. (Advisor)

D.Bedikoğlu(Student)

2020

Doctorate

Feeding habits and trophic levels of elasmobranch species in the Sea of Marmara

Demirel N. (Advisor)

G.Gül(Student)

Journal articles indexed in SCI, SSCI, and AHCI

2025

Fish assemblages in the Kaş-Kekova MPA: A comparative study of Posidonia oceanica meadows, sandy-rocky and rocky habitats

Ulaş A., Karayalı O., Veryeri N. O., Tosunoğlu Z., Demirel N.

Journal for Nature Conservation , vol.84, 2025 (SCI-Expanded)

2024

The stock status of narrow-barred Spanish mackerel, Scomberomorus commerson (Lacépède, 1800) in the southern Arabian Gulf: a case study using multiple length-based assessment approaches

Almusallami M., Dimech M., Francis F., Hamza W., Henderson A. C., Muzaffar S. B., et al.

Frontiers in Marine Science , vol.11, 2024 (SCI-Expanded)

2024

Decadal changes in the Sea of Marmara indicate degraded ecosystem conditions and unsustainable fisheries

Akoglu E., Saygu I., Demirel N.

FRONTIERS IN MARINE SCIENCE , vol.11, 2024 (SCI-Expanded)

2023

Shifts in the pelagic fishery dynamics in response to regional sea warming and fishing in the Northeastern Mediterranean

Demirel N., Akoğlu E., Yıldız T.

Regional Environmental Change , vol.23, no.4, 2023 (SCI-Expanded)

2023

New developments in the analysis of catch time series as the basis for fish stock assessments: The CMSY++ method

Froese R., Winker H., Coro G., Palomares M. D., Tsikliras A., Dimarchopoulou D., et al.

ACTA ICHTHYOLOGICA ET PISCATORIA , vol.53, pp.173-189, 2023 (SCI-Expanded)

2023

Occurrence, bioconcentration, and human health risks of pharmaceuticals in biota in the Sea of Marmara, T?rkiye

Korkmaz N., Caglar N., Aksu A., Ünsal Özgüvenç T., Balcıoglu E. B., Cavus Arslan H., et al.

CHEMOSPHERE , vol.325, 2023 (SCI-Expanded)

2023

Comparison of fish prey contribution in the diet of European hake by visual assessment of stomach contents and DNA metabarcoding

Gül G., Keskin E., Demirel N.

Environmental Biology of Fishes , vol.106, no.4, pp.613-625, 2023 (SCI-Expanded)

2023

Editorial: Fishing effort and the evolving nature of its efficiency

Demirel N., Nauen C. E., Palomares M. L. D.

FRONTIERS IN MARINE SCIENCE , vol.10, pp.5-8, 2023 (SCI-Expanded)

2023

Fisheries impact on the Sea of Marmara ecosystem structure and functioning during the last three decades

Saygu I., Akoglu E., Gül G., Bedikoğlu D., Demirel N.

Frontiers in Marine Science , vol.9, 2023 (SCI-Expanded)

2023

Uncovering ecological regime shifts in the Sea of Marmara and reconsidering management strategies

Demirel N., Akoglu E., Ulman A., Ertor-Akyazi P., Gül G., Bedikoğlu D., et al.

MARINE ENVIRONMENTAL RESEARCH , vol.183, pp.1-13, 2023 (SCI-Expanded)

2023

A biological and ecological study of the invasive pufferfish Torquigener hypselogeneion (Bleeker 1852) [conspecific Torquigener flavimaculosus Hardy & Randall, 1983] in the Eastern Mediterranean

Ulman A., Akbora H. D., Çanak Ö., Chu E., Çiçek B. A., Ersönmez H., et al.

AQUATIC INVASIONS , vol.18, no.1, pp.59-81, 2023 (SCI-Expanded)

2023

Bio-economic indicators of fisheries: impact of variations in landings and fish size on market prices in Istanbul Fish Market

Yildiz T., Ulman A., Karakulak F. S., Uzer U., Demirel N.

PEERJ , vol.11, 2023 (SCI-Expanded)

2022

Ontogenetic shift in diet and trophic role of Raja clavata inferred by stable isotopes and stomach content analysis in the Sea of Marmara

Gul G., Demirel N.

JOURNAL OF FISH BIOLOGY , vol.101, no.3, pp.560-572, 2022 (SCI-Expanded)

2022

The occurrence and feeding of a critically endangered shark species, Oxynotus centrina in the Sea of Marmara

Gul G., Yokes M. B., Demirel N.

JOURNAL OF FISH BIOLOGY , vol.101, no.3, pp.728-735, 2022 (SCI-Expanded)

2022

Reproductive strategies and population characteristics of key Cladocera species in the Sea of Marmara

Bedikoğlu D., Yilmaz I. N., Demirel N.

REGIONAL STUDIES IN MARINE SCIENCE , vol.54, pp.1-7, 2022 (SCI-Expanded)

2022

Catch of the day: Abundance and size data of groupers (Epinephelidae) and combers (Serranidae) from Middle to Late Holocene Levantine archaeological contexts

Winter R., Desiderà E., Guidetti P., Vermeersch S., Demirel N., Çakırlar C.

Journal of Island and Coastal Archaeology , 2022 (AHCI)

2021

The biology and ecology of the invasive silver-cheeked toadfish (Lagocephalus sceleratus), with emphasis on the Eastern Mediterranean

Ulman A., Yildiz T., Demirel N., Çanak Ö., Yemişken E., Pauly D.

NEOBIOTA , vol.68, pp.145-175, 2021 (SCI-Expanded)

2021

A moving target: Achieving good environmental status and social justice in the case of an alien species, Rapa whelk in the Black Sea

Demirel N., Ulman A., Yildiz T., Ertor-Akyazi P.

MARINE POLICY , vol.132, 2021 (SSCI)

2021

Evaluation of the comprehensive feeding strategy and trophic role of overexploited mesopredator species in the Sea of Marmara (northeastern Mediterranean)

Gul G., Demirel N.

ESTUARINE COASTAL AND SHELF SCIENCE , vol.259, 2021 (SCI-Expanded)

2021

Low Pufferfish and Lionfish Predation in Their Native and Invaded Ranges Suggests Human Control Mechanisms May Be Necessary to Control Their Mediterranean Abundances

Ulman A., Harris H. E. E., Doumpas N., Deniz Akbora H., Al Mabruk S. A. A., Azzurro E., et al.

FRONTIERS IN MARINE SCIENCE , vol.8, 2021 (SCI-Expanded)

2020

Stock dynamics and predator-prey effects of Atlantic bonito and bluefish as top predators in the Black Sea

Daskalov G. M., Demirel N., Ulman A., Georgieva Y., Zengin M.

ICES JOURNAL OF MARINE SCIENCE , vol.77, no.7-8, pp.2995-3005, 2020 (SCI-Expanded)

2020

A comparison of market landings during fish spawning seasons to better understand the effectiveness of the temporal fishery closure in Turkey

Yıldız T., Ulman A., Demirel N.

OCEAN & COASTAL MANAGEMENT , vol.198, 2020 (SCI-Expanded)

2020

The Lost Fish of Turkey: A Recent History of Disappeared Species and Commercial Fishery Extinctions for the Turkish Marmara and Black Seas

Ulman A., Zengin M., Demirel N., Pauly D.

FRONTIERS IN MARINE SCIENCE , vol.7, 2020 (SCI-Expanded)

2020

Estimating stock status from relative abundance and resilience

Froese R., Winker H., Coro G., Demirel N., Tsikliras A. C., Dimarchopoulou D., et al.

ICES Journal of Marine Science , vol.77, pp.527-538, 2020 (SCI-Expanded)

2020

First Large-Scale Eastern Mediterranean and Black Sea Stock Assessment Reveals a Dramatic Decline

Demirel N., Zengin M., Ulman A.

Frontiers in Marine Science , vol.7, 2020 (SCI-Expanded)

2019

On the pile-up effect and priors for L-inf and M/K: response to a comment by Hordyk et al. on "A new approach for estimating stock status from length frequency data" Reply

Froese R., Winker H., Coro G., Demirel N., Tsikliras A. C., Dimarchopoulou D., et al.

ICES JOURNAL OF MARINE SCIENCE , vol.76, pp.461-465, 2019 (SCI-Expanded)

2018

Status and rebuilding of European fisheries

Froese R., Winker H., Coro G., Demirel N., Tsikliras A. C., Dimarchopoulou D., et al.

MARINE POLICY , vol.93, pp.159-170, 2018 (SSCI)

2018

A new approach for estimating stock status from length frequency data

Froese R., Winker H., Coro G., Demirel N., Tsikliras A. C., Dimarchopoulou D., et al.

ICES Journal of Marine Science , vol.75, pp.2004-2015, 2018 (SCI-Expanded)

2017

Estimating fisheries reference points from catch and resilience

Froese R., Demirel N., Coro G., Kleisner K. M., Winker H.

FISH AND FISHERIES , vol.18, pp.506-526, 2017 (SCI-Expanded)

2016

Reply to Andersen et al. (2016) "Assumptions behind size-based ecosystem models are realistic"

Froese R., Walters C., Pauly D., Winker H., Weyl O. L. F., Demirel N., et al.

ICES JOURNAL OF MARINE SCIENCE , vol.73, pp.1656-1658, 2016 (SCI-Expanded)

2016

A critique of the balanced harvesting approach to fishing

Froese R., Walters C., Pauly D., Winker H., Weyl O. L. F., Demirel N., et al.

ICES JOURNAL OF MARINE SCIENCE , vol.73, pp.1640-1650, 2016 (SCI-Expanded)

2016

Revisiting safe biological limits in fisheries

Froese R., Coro G., Kleisner K., Demirel N.

FISH AND FISHERIES , vol.17, pp.193-209, 2016 (SCI-Expanded)

2015

New records of jellyfish species in the Marmara Sea

Isinibilir M., Yılmaz I., Demirel N.

ITALIAN JOURNAL OF ZOOLOGY , vol.82, no.3, pp.425-429, 2015 (SCI-Expanded)

2015

An overall indicator for the good environmental status of marine waters based on commercially exploited species

Froese R., Demirel N., Sampang A.

MARINE POLICY , vol.51, pp.230-237, 2015 (SSCI)

2015

Ichthyoplankton dynamics in a highly urbanized estuary

Demirel N.

MARINE BIOLOGY RESEARCH , vol.11, pp.677-688, 2015 (SCI-Expanded)

2014

Influence of the extreme conditions on the water quality and material exchange flux in the Strait of Istanbul

Altiok H., Aslan A., Övez S., Demirel N., Yuksek A., Kiratli N., et al.

JOURNAL OF MARINE SYSTEMS , vol.139, pp.204-216, 2014 (SCI-Expanded)

2013

Reproductive biology of Trachurus mediterraneus (Carangidae): a detailed study for the Marmara - Black Sea stock

Demirel N., Yuksek A.

JOURNAL OF THE MARINE BIOLOGICAL ASSOCIATION OF THE UNITED KINGDOM , vol.93, pp.357-364, 2013 (SCI-Expanded)

2012

Weight-length relationships of 28 fish species in the Sea of Marmara

Demirel N., Murat Dalkara E.

TURKISH JOURNAL OF ZOOLOGY , vol.36, pp.785-791, 2012 (SCI-Expanded)

2007

Alien Crustacean Decapods from the Aegean Coast of Turkey

Yokeş M. B., Karhan S. U., Okus E., Yuksek A., Aslan-Yilmaz A., Yilmaz I. N., et al.

AQUATIC INVASIONS , vol.2, no.3, pp.162-168, 2007 (SCI-Expanded)

Articles Published in Other Journals

2025

Climate land use and other drivers' impacts on island ecosystem services: A global review

Moustakas A., Zemah-Shamir S., Tase M., Zotos S., Demirel N., Zoumides C., et al.

THE SCIENCE OF THE TOTAL ENVIRONMENT AN INTERNATIONAL JOURNAL FOR SCIENTIFIC RESEARCH INTO THE ENVIRONMENT AND ITS RELATIONSHIP WITH MAN , vol.973, pp.1-20, 2025 (Scopus)

2024

Assessment of Human Health Impacts from Invasive Pufferfish (Attacks, Poisonings and Fatalities) across the Eastern Mediterranean

Ulman A., Abd Rabou A. F. N., Al Mabruk S., Bariche M., Bilecenoğlu M., Demirel N., et al.

BIOLOGY-BASEL , vol.13, no.4, pp.1-19, 2024 (Peer-Reviewed Journal)

2024

Brief overview of fisheries management in the Black Sea: Türkiye and EU member states

Demirel N., Öz M. I., Gönülal O.

Journal of the Black Sea / Mediterranean Environment , vol.30, no.1, 2024 (Peer-Reviewed Journal)

Papers Presented at Peer-Reviewed Scientific Conferences

2025

Economic support tools for MarIAS management in the Mediterranean

Demirel N.

Environmentally Friendly Economic Tools and Finances , Marseille, France, 29 January 2025, pp.1, (Summary Text)

2024

Fishing impact assessment on an altered marine ecosystem requires ecosystem approach to fisheries

Demirel N.

Fish Forum 2024, Antalya, Turkey, 19 - 23 February 2024, pp.1, (Summary Text)

2023

Ecosystem approach to marine management: Challenges and opportunities

Demirel N.

International Conference on Türkiye’s Contributions to the UN Decade of Ocean Science for Sustainable Development, Ankara, Turkey, 26 September 2023, (Unpublished)

2023

FishBase contribution to improve knowledge in data-poor regions: a case study on the Sea of Marmara, Eastern Mediterranean

Demirel N.

FishBase / SeaLifeBase Symposium, Brussels, Belgium, 4 - 05 September 2023, pp.1, (Summary Text)

2022

The status of the ecosystem and fishery resources in the Sea of Marmara

Demirel N.

3rd National Marine Monitoring and Evaluation Symposium, Antalya, Turkey, 6 - 09 December 2022, pp.1, (Summary Text)

2022

Potential effect of mucilage formation on fish stocks in the Sea of Marmara

Demirel N.

5th National Marine Sciences Conference, Trabzon, Turkey, 3 - 05 June 2022, pp.1, (Summary Text)

2018

Reassessment of the changing fisheries for data poor stocks in the Eastern Mediterranean

Demirel N.

Fish Forum 2018, Rome, Italy, 10 - 14 December 2018, pp.1, (Summary Text)

Books

2024

Fishing Subsidies and Their Impacts on Marine Ecosystem Health in the Mediterranean Sea

Demirel N., Ertör Akyazı P., Yıldız T.

in: Unraveling the Impact of Environmentally Harmful Subsidies in the Mediterranean, Robin Degron,Constantin Tsakas, Editor, UNEP/MAP and Plan Bleu, Marseille, pp.58-75, 2024

2024

Indicator-based Assessment of Fishing Impact on the Sea of Marmara Ecosystem

Demirel N.

in: Ecological Changes in the Sea of Marmara, Melek Isinibilir,Ahmet E. Kideys,Alenka Malej, Editor, Istanbul University, İstanbul, pp.769-777, 2024

2023

Status of the Sea of Marmara ecosystem and its fishery resources: Mucilage episodes and recommendations for sustainable fisheries

Demirel N., Yildiz T., Ulman A., Zengin M., Akoglu E., Saygu I., et al.

in: Mucilage Problem in the Sea of Marmara, Meriç Albay, Editor, Istanbul University, İstanbul, pp.217-232, 2023

2013

Ecosystem Based Approach for Sustainable Fisheries

Demirel N., Demir V., Oruç A., Akça N., Araç N., Kalem S.

WWF-Türkiye, İstanbul, 2013

Funded Projects

2024 - 2027

Black Sea Smart Marine Environmental Outcome System

EU Supported Other Project

(Project Abstract)

Bayrak H., Buga L., Kordzakhia G., Demirel N., Gazioğlu C., Zeki Stumpfeldt S., et al.

2022 - 2024

Marmara Denizinde ticari öneme sahip bazı balıkların av verimindeki değişimlerin çevresel koşullarla ilişkisi

Project Supported by Higher Education Institutions

DEMİREL EROL N. (Executive), YILDIZ T., DURSUN F., GÜL G., SAYGU İ., AKALIN S.

2016 - 2024

Integrated Marine Monitoring in Turkish Seas: Marine Monitoring and Assessment of Ecological Quality in the Sea of Marmara

Project Supported by Other Official Institutions

(Project Abstract) (Project Final Report)

Polat-Beken Ç., Atabay H.(Executive), Demirel N., Yılmaz N., Bedikoğlu D.

2020 - 2020

Assessment of Commercial Fish Stocks and Modeling Future Stock Scenarios in the Sea of Marmara

TUBITAK Project

(Project Abstract) (Project Final Report)

Demirel N. (Executive), Gül G., Bedikoğlu D.

2016 - 2019

Marine Knowledge Sharing Platform for Federating Responsible Research and Innovation Communities (MARINA)

H2020 Project

Altıok H., Ediger D., Demirel N., Yılmaz I. N., Dursun F., Zeki Stumpfeldt S., et al.

2016 - 2016

Exploitation and status of European stocks

Other International Funding Programs

(Project Abstract) (Project Final Report)

Froese R.(Executive), Winker H., Coro G., Demirel N., Tsikliras A., Scarcella G.

2015 - 2016

Standardization of Marine Monitoring

Project Supported by Other Official Institutions

(Project Abstract) (Project Final Report)

Polat-Beken Ç.(Executive), Ediger D., Demirel N.

2015 - 2015

Monitoring and Assessment of Pollution and Ecological Quality in the Sea of Marmara

Project Supported by Other Official Institutions

Polat-Beken Ç.(Executive), Ediger D., Demirel N., Dursun F.

2012 - 2013

Confronting the myth of the bitter sea pre historic exploitation of the eastern Mediterranean seascape

Project Supported by Private Organizations in Other Countries

Çakırlar C.(Executive), Demirel N.

Activities in Scientific Journals

2024 - Continues

Aquaculture, Fish and Fisheries

Assistant Editor/Section Editor

2016 - Continues

FRONTIERS IN MARINE SCIENCE

Assistant Editor/Section Editor

2015 - 2022

JOURNAL OF APPLIED ICHTHYOLOGY

Advisory Committee Member

Memberships and Roles in Scientific Organizations

2023 - Continues

FishBase

Country Representative

Scientific Project Refereeing

June 2024

EU Supported Other Project

The Sustainable Blue Economy Partnership, France

December 2023

EU Supported Other Project

The Sustainable Blue Economy Partnership, France

February 2022

H2020 Project

RIA Research and Innovation Actions Project, European Commission, Belgium

September 2020

H2020 Project

RIA Research and Innovation Actions Project, European Commission, Belgium

February 2019

H2020 Project

RIA Research and Innovation Actions Project, European Commission, Belgium

September 2017

H2020 Project

RIA Research and Innovation Actions Project, European Commission, Belgium

February 2016

H2020 Project

RIA Research and Innovation Actions Project, European Commission, Belgium

Scientific Consultations

2016 - 2016

Project Consultancy

Food and Agricultural Organizaton

Istanbul University, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü, Turkey

Scientific Research / Working Group Memberships

2024 - Continues

Methodological Assessment On Monitoring Biodiversity And Nature’S Contributions To People

https://www.ipbes.net/monitoring

Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES), Germany

2024 - Continues

Working Group On Ocean Economy/Sustainable Finance

https://www.unep.org/unepmap/index.php/

United Nations Environment Programme /Mediterranean Action Plan, France

2024 - Continues

Rethinking The Blue Economy: Socio-Ecological Impacts And Opportunities - Rethinkblue - Ca22122

https://www.cost.eu/actions/CA22122/#tabs+Name:Description

University of Zadar, Croatia

2023 - Continues

Mbon Europe: Marine Biodiversity Monitoring For Europe

https://euromarinenetwork.eu/activities/mbon-europe/

Nord University, Norway

2023 - Continues

The Mediterranean Experts On Climate And Environmental Change (Medecc)

https://www.medecc.org/

Plan Bleu, France

2022 - Continues

Enhancing Small-Medium Islands Resilience By Securing The Sustainability Of Ecosystem Services - Smiles - Ca21158

https://cost-smiles.eu/

Open University of Cyprus, Cyprus (Gkry)

2021 - 2024