Biyografi
I am a marine biologist with a focus on fisheries conservation and the ecosystem approach to fisheries. I got my PhD in marine biology from Istanbul University in 2010 and later gained experience in fisheries conservation, working closely with Dr. Rainer Froese on data-limited stock assessment methods. With 20 years of experience, I have contributed as a project coordinator, consultant, and expert to various fisheries management and ecosystem conservation projects both nationally and internationally. Since 2015, I have been a senior researcher at the Institute of Marine Sciences and Management at Istanbul University. My work primarily explores the state of marine ecosystems and fisheries resources in the Eastern Mediterranean, particularly under the influence of environmental stressors.
My current researches focuses on estimating reference points using multiple tools for best management practices of data-limited fish stocks. I am particularly interested in ecosystem approach to fisheries management by using different models to determine status of ecosystem and fisheries resources. First, I use fisheries biology to better understand life history and ecological roles of commercial species, and second, I employ relationships with environmental conditions and ecosystem changes to identify indicators and reference points for fisheries.
Eğitim Bilgileri
2004 - 2010
2004 - 2010Doktora
İstanbul Üniversitesi, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü, Türkiye
2001 - 2004
2001 - 2004Yüksek Lisans
İstanbul Üniversitesi, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü, Türkiye
1997 - 2001
1997 - 2001Lisans
İstanbul Üniversitesi, Su Ürünleri Fakültesi, Türkiye
Araştırma Alanları
Balıkçılık
Deniz Biyolojisi
Biyolojik Oşinografi
Akademik Unvanlar / Görevler
2022 - Devam Ediyor
2022 - Devam EdiyorProf.Dr.
İstanbul Üniversitesi, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü
2016 - 2022
2016 - 2022Doç.Dr.
İstanbul Üniversitesi, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü
2013 - 2015
2013 - 2015Araştırmacı
GEOMAR Helmholtz Centre for Ocean Research Kiel, Evolutionary Ecology of Fishes
2010 - 2013
2010 - 2013Araştırma Görevlisi Dr.
İstanbul Üniversitesi, Deniz Bilimleri Ve İşletmeciliği Enstitüsü, Deniz Bilimleri Ve İşletmeciliği Bölümü
2001 - 2010
2001 - 2010Araştırma Görevlisi
İstanbul Üniversitesi, Deniz Bilimleri ve İşletmeciliği Enstitüsü, Deniz Bilimleri ve İşletmeciliği Bölümü
Akademi Dışı Deneyim
2020 - 2020
2020 - 2020BlackSea4Fish Project Coordinator
Birleşmiş Milletler, Food and Agricultural Organizaiton (FAO), General Fisheries Commission for the Mediterranean (GFCM)
Yönetilen Tezler
Devam Ediyor
Devam EdiyorDoktora
Seasonal vertical distribution and impact of climate change on size variations of zooplankton in the Sea of Marmara
Demirel N. (Danışman)
D.Bedikoğlu(Öğrenci)
2020
2020Yüksek Lisans
Reproduction strategy of dominant Cladocera species of the Sea of Marmara
Demirel N. (Danışman)
D.Bedikoğlu(Öğrenci)
2020
2020Doktora
Feeding habits and trophic levels of elasmobranch species in the Sea of Marmara
Demirel N. (Danışman)
G.Gül(Öğrenci)
SCI, SSCI ve AHCI İndekslerine Giren Dergilerde Yayınlanan Makaleler
2024
2024Assessment 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
, cilt.13, sa.4, ss.1-19, 2024 (SCI-Expanded)
2023
2023Shifts 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
, cilt.23, sa.4, 2023 (SCI-Expanded)
2023
2023New 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
, cilt.53, ss.173-189, 2023 (SCI-Expanded)
2023
2023Occurrence, 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
, cilt.325, 2023 (SCI-Expanded)
2023
2023Editorial: Fishing effort and the evolving nature of its efficiency
Demirel N., Nauen C. E., Palomares M. L. D.
FRONTIERS IN MARINE SCIENCE
, cilt.10, ss.5-8, 2023 (SCI-Expanded)
2023
2023Comparison 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
, cilt.106, sa.4, ss.613-625, 2023 (SCI-Expanded)
2023
2023Fisheries 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
, cilt.9, 2023 (SCI-Expanded)
2023
2023Bio-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
, cilt.11, 2023 (SCI-Expanded)
2023
2023A 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
, cilt.18, sa.1, ss.59-81, 2023 (SCI-Expanded)
2023
2023Uncovering 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
, cilt.183, ss.1-13, 2023 (SCI-Expanded)
2022
2022Ontogenetic 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
, cilt.101, sa.3, ss.560-572, 2022 (SCI-Expanded)
2022
2022The 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
, cilt.101, sa.3, ss.728-735, 2022 (SCI-Expanded)
2022
2022Reproductive 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
, cilt.54, ss.1-7, 2022 (SCI-Expanded)
2022
2022Catch 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
2021A 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
, cilt.132, 2021 (SSCI)
2021
2021The 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
, cilt.68, ss.145-175, 2021 (SCI-Expanded)
2021
2021Evaluation 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
, cilt.259, 2021 (SCI-Expanded)
2021
2021Low 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
, cilt.8, 2021 (SCI-Expanded)
2020
2020Stock 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
, cilt.77, sa.7-8, ss.2995-3005, 2020 (SCI-Expanded)
2020
2020A 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
, cilt.198, 2020 (SCI-Expanded)
2020
2020The 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
, cilt.7, 2020 (SCI-Expanded)
2020
2020Estimating 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
, cilt.77, ss.527-538, 2020 (SCI-Expanded)
2020
2020First Large-Scale Eastern Mediterranean and Black Sea Stock Assessment Reveals a Dramatic Decline
Demirel N., Zengin M., Ulman A.
Frontiers in Marine Science
, cilt.7, 2020 (SCI-Expanded)
2019
2019On 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
, cilt.76, ss.461-465, 2019 (SCI-Expanded)
2018
2018Status and rebuilding of European fisheries
Froese R., Winker H., Coro G., Demirel N., Tsikliras A. C., Dimarchopoulou D., et al.
MARINE POLICY
, cilt.93, ss.159-170, 2018 (SSCI)
2018
2018A 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
, cilt.75, ss.2004-2015, 2018 (SCI-Expanded)
2017
2017Estimating fisheries reference points from catch and resilience
Froese R., Demirel N., Coro G., Kleisner K. M., Winker H.
FISH AND FISHERIES
, cilt.18, ss.506-526, 2017 (SCI-Expanded)
2016
2016Reply 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
, cilt.73, ss.1656-1658, 2016 (SCI-Expanded)
2016
2016A 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
, cilt.73, ss.1640-1650, 2016 (SCI-Expanded)
2016
2016Revisiting safe biological limits in fisheries
Froese R., Coro G., Kleisner K., Demirel N.
FISH AND FISHERIES
, cilt.17, ss.193-209, 2016 (SCI-Expanded)
2015
2015New records of jellyfish species in the Marmara Sea
Isinibilir M., Yılmaz I., Demirel N.
ITALIAN JOURNAL OF ZOOLOGY
, cilt.82, sa.3, ss.425-429, 2015 (SCI-Expanded)
2015
2015An overall indicator for the good environmental status of marine waters based on commercially exploited species
Froese R., Demirel N., Sampang A.
MARINE POLICY
, cilt.51, ss.230-237, 2015 (SSCI)
2015
2015Ichthyoplankton dynamics in a highly urbanized estuary
Demirel N.
MARINE BIOLOGY RESEARCH
, cilt.11, ss.677-688, 2015 (SCI-Expanded)
2014
2014Influence 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
, cilt.139, ss.204-216, 2014 (SCI-Expanded)
2013
2013Reproductive 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
, cilt.93, ss.357-364, 2013 (SCI-Expanded)
2012
2012Weight-length relationships of 28 fish species in the Sea of Marmara
Demirel N., Murat Dalkara E.
TURKISH JOURNAL OF ZOOLOGY
, cilt.36, ss.785-791, 2012 (SCI-Expanded)
2007
2007Alien 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
, cilt.2, sa.3, ss.162-168, 2007 (SCI-Expanded)
Diğer Dergilerde Yayınlanan Makaleler
Hakemli Kongre / Sempozyum Bildiri Kitaplarında Yer Alan Yayınlar
2024
2024Fishing subsidies and their impacts on marine ecosystems in Türkiye: The past, present and future
Demirel N.
Workshop on Environmentally Harmful Subsidies, Marseille, Fransa, 30 Ocak 2024, ss.1
2024
2024Fishing impact assessment on an altered marine ecosystem requires ecosystem approach to fisheries
Demirel N.
Fish Forum 2024, Antalya, Türkiye, 19 - 23 Şubat 2024, ss.1
2023
2023Ecosystem 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, Türkiye, 26 Eylül 2023
2023
2023FishBase contribution to improve knowledge in data-poor regions: a case study on the Sea of Marmara, Eastern Mediterranean
Demirel N.
FishBase / SeaLifeBase Symposium, Brussels, Belçika, 4 - 05 Eylül 2023, ss.1
2022
2022The status of the ecosystem and fishery resources in the Sea of Marmara
Demirel N.
3rd National Marine Monitoring and Evaluation Symposium, Antalya, Türkiye, 6 - 09 Aralık 2022, ss.1
2022
2022Potential effect of mucilage formation on fish stocks in the Sea of Marmara
Demirel N.
5th National Marine Sciences Conference, Trabzon, Türkiye, 3 - 05 Haziran 2022, ss.1
2018
2018Reassessment of the changing fisheries for data poor stocks in the Eastern Mediterranean
Demirel N.
Fish Forum 2018, Rome, İtalya, 10 - 14 Aralık 2018, ss.1
Kitap & Kitap Bölümleri
2023
2023Status 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.
Mucilage Problem in the Sea of Marmara, Meriç Albay, Editör, Istanbul University, İstanbul, ss.217-232, 2023
2013
2013Sürdürülebilir Balıkçılık için "Ekosistem Temelli Yönetim"
Demirel N., Demir V., Oruç A., Akça N., Araç N., Kalem S.
Wwf-Türkiye (Doğal Hayatı Koruma Vakfı), İstanbul, 2013
Desteklenen Projeler
2022 - 2024
2022 - 2024
Marmara Denizinde ticari öneme sahip bazı balıkların av verimindeki değişimlerin çevresel koşullarla ilişkisi
Yükseköğretim Kurumları Destekli Proje
(Proje Özeti)
Demirel N. (Yürütücü), Gül G., Yıldız T., Saygu I., Akalın S., Dursun F.
2016 - 2024
2016 - 2024
Türkiye Denizlerinde Bütünleşik İzleme Faaliyetleri kapsamında Marmara Denizi Ekolojik Kalite İzleme ve Değerlendirme Projesi
Diğer Resmi Kurumlarca Desteklenen Proje
(Proje Özeti)
(Proje Sonuç Raporu)
Polat-Beken Ç., Atabay H.(Yürütücü), Demirel N., Yılmaz N., Bedikoğlu D.
2016 - 2016
2016 - 2016
Exploitation and status of European stocks
Diğer Uluslararası Fon Programları
(Proje Özeti)
(Proje Sonuç Raporu)
Froese R.(Yürütücü), Winker H., Coro G., Demirel N., Tsikliras A., Scarcella G.
2015 - 2016
2015 - 2016
Deniz İzlemelerinde Standardizasyonun Sağlanması Projesi
Diğer Resmi Kurumlarca Desteklenen Proje
(Proje Özeti)
(Proje Sonuç Raporu)
Polat-Beken Ç.(Yürütücü), Ediger D., Demirel N.
2015 - 2016
2015 - 2016
Marmara Denizi Berlam Balığı Stoklarının Ekosistem Yaklaşımı Çerçevesinde Sürdürülebilirlik Düzeyi
TÜBİTAK Projesi
(Proje Özeti)
(Proje Sonuç Raporu)
Demirel N. (Yürütücü), Gül G.
2015 - 2015
2015 - 2015Marmara Denizi Kirlilik ve Ekolojik Kalite İzleme ve Değerlendirme Projesi
Diğer Resmi Kurumlarca Desteklenen Proje
Polat-Beken Ç.(Yürütücü), Ediger D., Demirel N., Dursun F.
2012 - 2013
2012 - 2013
Confronting the myth of the bitter sea pre historic exploitation of the eastern Mediterranean seascape
Diğer Ülkelerdeki Özel Organizasyonlar Tarafından Desteklenmiş Proje
Çakırlar C.(Yürütücü), Demirel N.
Bilimsel Dergilerdeki Faaliyetler
2016 - Devam Ediyor
2016 - Devam EdiyorFRONTIERS IN MARINE SCIENCE
Yardımcı Editör/Bölüm Editörü
2015 - 2022
2015 - 2022JOURNAL OF APPLIED ICHTHYOLOGY
Danışma Kurul Üyesi
Bilimsel Hakemlikler
Aralık 2023
Aralık 2023AB Destekli Diğer Projeler
The Sustainable Blue Economy Partnership, Fransa
Şubat 2022
Şubat 2022UFUK 2020 Projesi
RIA, Araştırma ve Yenilikçilik Eylemleri Projesi, European Commission, Belçika
Eylül 2020
Eylül 2020UFUK 2020 Projesi
RIA, Araştırma ve Yenilikçilik Eylemleri Projesi, European Commission, Belçika
Şubat 2019
Şubat 2019UFUK 2020 Projesi
RIA, Araştırma ve Yenilikçilik Eylemleri Projesi, European Commission, Belçika
Eylül 2017
Eylül 2017UFUK 2020 Projesi
RIA, Araştırma ve Yenilikçilik Eylemleri Projesi, European Commission, Belçika
Şubat 2016
Şubat 2016UFUK 2020 Projesi
RIA, Araştırma ve Yenilikçilik Eylemleri Projesi, European Commission, Belçika
Bilimsel Danışmanlıklar
2016 - 2016
2016 - 2016Bilimsel Projeler İçin Yapılan Danışmanlık
Food and Agricultural Organizaton
İstanbul Üniversitesi, Deniz Bilimleri Ve İşletmeciliği Enstitüsü, Deniz Bilimleri Ve İşletmeciliği Bölümü, Türkiye
Bilimsel Araştırma / Çalışma Grubu Üyelikleri
2024 - Devam Ediyor
2024 - Devam Ediyor
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 - Devam Ediyor
2023 - Devam Ediyor
Fishbase
https://www.fishbase.se/search.php
Quantitative Aquatics, Philippines
2023 - Devam Ediyor
2023 - Devam Ediyor
Mbon Europe: Marine Biodiversity Monitoring For Europe
https://euromarinenetwork.eu/activities/mbon-europe/
Nord University, Norway
2022 - Devam Ediyor
2022 - Devam Ediyor
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 - Devam Ediyor
2021 - Devam Ediyor