Yazar "Ceylan, Yusuf" için listeleme
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Are cloth tarpaulin mounted nets effective for discard reduction in trammel nets?
Eryaşar, Ahmet Raif; Ceylan, Yusuf; Özbilgin, Hüseyin; Bozaoğlu, Adem Sezai (Central Fisheries Research Institute, 2021)Discarding is a significant problem due to net damage and labour loss in trammel net fisheries. In this study, the effects of 15, 25, and 35 cm high cloth tarpaulin rigged between the lead line and the net were investigated ... -
The atlantic starfish, Asterias rubens Linnaeus, 1758 (Echinodermata: Asteroidea: Asteriidae) spreads in the Black sea
Dalgıç, Göktuğ; Ceylan, Yusuf; Şahin, Cemalettin (Regional Euro-Asian Biological Invasions Centre, 2009)A single specimen of Asterias rubens was collected on 17 February 2009 off Karasu, Sakarya, Turkey. Its possible impact on Mytilus galloprovincialis beds in the Black Sea is discussed. © 2009 The Author(s). -
Bottom trawl fishery discards on the Black Sea coast of Turkey
Ceylan, Yusuf; Şahin, Cemalettin; Kalaycı, Ferhat (Natl Centre Marine Research, 2014)The purpose of this study is to determine the amount of bycatch and discards of fish caught by bottom trawlers operating along the Black Sea coasts of Turkey and discards changes depending on the depth. the study was ... -
Bycatch in the commercial beam trawl fishery for Rapa Whelk in the Black Sea
Eryaşar, Ahmet Raif; Ceylan, Yusuf; Dalgıç, Göktuğ; Yeşilçiçek, Tuncay (Natl Centre Marine Research, 2018)The current study was aimed to investigate the bycatch in commercial beam trawls used in the rapa whelk (Rapana venosa) fishery during September 1, 2015, and April 30, 2016. Four commercial boats using beam trawls were ... -
Determination of some biological characteristics and population parameters of the blotched picarel (Spicara flexuosa Rafinesque, 1810) distributed in the Eastern Black Sea (Rize - Hopa)
This study was carried out in order to determine some biological characteristics of the fish species of Spicara flexuosa, which is distributed on the Eastern Black Sea coast, and to contribute to the management of the ... -
Doğu Karadeniz’de İstavrit (Trachurus mediterraneus Steindachner, 1868) balığının yaş, büyüme parametreleri ve ilk eşeysel olgunluk boyunun belirlenmesi
Şahin, Cemalettin; Ceylan, Yusuf (2023)Doğu Karadeniz’deki istavrit (Trachurus mediterraneus) populasyonunun bazı temel parametrelerinin belirlenmesi amaçlanan bu çalışma, Eylül 2019-Ağustos 2020 tarihleri arasında yürütülmüştür. 12 aylık örnekleme sonucunda ... -
Doğu Karadeniz’de Mezgit (Merlangius merlangus, Nordmann, 1840) balığının yaş, büyüme ve ilk eşeysel olgunluk boyunun belirlenmesi
Çalışmada, Doğu Karadeniz’deki Mezgit (Merlangius merlangus) popülasyonunun bazı temel parametrelerinin belirlenmesi amaçlanmıştır. Mart 2017- Şubat 2018 tarihleri arasında yapılan 12 aylık örneklemede elde edilen ve ... -
The first evidence of microplastics occurrence in Greater Pipefish (Syngnathus acus Linnaetabus, 1758) in the Black Sea
Şentürk, Yasemen; Emanet, Muhammet; Ceylan, Yusuf; Aytan, Ülgen (Central Fisheries Research Inst, 2023)Microplastics (MPs) occurrence in greater pipefish Syngnathus acus was assessed in the Black Sea for the first time. MPs were found in 21 % of total pipefish examined. MPs were mainly fibres in shape (89 %), black in colour ... -
First records of anomalously white harbour porpoises (Phocoena phocoena) in the Turkish seas with a global review
Tonay, Arda M.; Bilgin, Sabri; Dede, Ayhan; Akkaya, Aylin; Yeşilçiçek, Tuncay; Köse, Özay; Ceylan, Yusuf (Assoc Teriologica Italiana, 2012)Three anomalously white harbour porpoises (Phocoena phocoena) were reported in Turkish Seas. One of them was bycaught on 19 June 2011 in bottom gill nets off the eastern coast of the Turkish Black Sea. the second one was ... -
First report of Nerocila orbigyni (Crustacea, Isopoda, Cymothoidae) on Solea solea (Teleostei, Soleidae) from Turkish sea
Kayış, Sevki; Ceylan, Yusuf (Trabzon Su Ürünleri Merkez Araştırma Enstitüsü, 2011)Nerocila orbignyi (Crustacea, Isopoda, Cymothoidae) is observed in between the operculum and pectoral fin of the sole, Solea solea (Teleostei, Soleidae), collected from the Pazar coast, Black Sea, Turkey. N. orbignyi was ... -
Investigation of beaches suitable for nourishment in Rize Province, Turkey
Karasu, Servet; Ceylan, Yusuf; Güner, M.S.; Süme, Veli (Middle East Technical University, 2009)Black Sea Coast Motorway was recently built along the shore (about 600 km), and a number of beaches were destroyed. Now there are a couple of short beaches in Eastern Black Sea region. People need new beaches. On the other ... -
İyidere-Of bölgesi batimetrisinin hazırlanması
Karasu, Servet; Otay, Emre; Karaman, Harun; Uzlu, Ergun; Can, Murat; Kartal, Şaban; Ceylan, Yusuf (2015)Doğu Karadeniz Bölgesi, Avrupa ve Orta Asya'ya açılan Kafkasya Koridoru üzerindeki konumu ile stratejik öneme sahiptir. Ovit Tüneli'nin tamamlanması bu ulaştırma koridorundaki Kuzey-Güney yük hareketinde ve özellikle İran ... -
Karadeniz'de kullanılan dip trolü ve gırgır ağlarının hedef dışı tür ve ıskarta oranlarının belirlenmesi
Ceylan, Yusuf (Rize Üniversitesi / Fen Bilimleri Enstitüsü / Su Ürünleri Anabilim Dalı, 2011)Bu çalışmada, Karadeniz'de dip trolü ve gırgır avcılığından kaynaklanan, hedef dışı türler ve miktarları belirlenmiştir. Eylül 2009-Mayıs 2010 tarihleri arasında, gırgır örneklemeleri Doğu Karadeniz bölgesinde Rize ilinden ... -
Life-history traits of the black scorpionfish (Scorpaena porcus) in southeastern Black Sea
Şahin, Cemalettin; Erbay, Murat; Kalaycı, Ferhat; Ceylan, Yusuf; Yeşilçiçek, Tuncay (Central Fisheries Research Inst, 2019)Scorpaena porcus is one of the most important members of rock and reef community in the Black Sea. the present study aimed to investigate the bio-ecological properties of 5. porcus in the Eastern Black Sea. the growth, ... -
Monthly microplastics change in European anchovy's (Engraulis encrasicolus) gastrointestinal tract in the Black Sea
Gedik, Kenan; Eryaşar, Ahmet Raif; Emanet, Muhammet; Şahin, Cemalettin; Ceylan, Yusuf (Elsevier, 2023)To contribute to a better understanding of the regional dynamics of MP pollution and its potential effects on the anchovy population and human health, here we assessed the presence and characterization of microplastics ... -
Occurrence data of the Atlantic Blue Crab (Callinectes sapidus, Rathbun, 1896) Indicates that a New Indwelled is Settling in the Black Sea
Ceylan, Yusuf (Central Fisheries Research Inst, 2024)It is remarkable that blue crabs have been encountered frequently in recent years, especially on the southern coast of the Black Sea, after it was first reported in 1968. Reporting of three new records for blue crabs was ... -
Performance based assessment of a small-scale artificially nourished beach
Karasu, Servet; Marangoz, Hasan Oğulcan; Gülkaya, Enes; Akpınar, Adem; Ceylan, Yusuf; Yılmaz, Enver (Elsevier, 2023)In coastal engineering studies, coastal protection procedures can be provided by hard and soft methods. Soft methods applied using the right techniques and methods are not only long-lasting but also adapt to the natural ... -
Plastic occurrence in commercial fish species of the Black Sea
Aytan, Ülgen; Esensoy, Fatma Başak; Şentürk, Yasemen; Arifoğlu, Esra; Karaoğlu, Kaan; Ceylan, Yusuf; Valente, Andre (Central Fisheries Research, 2022)The occurrence of micro- ( 5 mm), meso- (5-25 mm) and macroplastics ( 25mm) was investigated in seven commercial fish species of the Black Sea. Plastics were found in gastrointestinal track of all species analysed: Engraulis ... -
Population structure, age and growth of Sardine, Sardina pilchardus (Walbaum, 1792) in the Black Sea
Dalgıç, Göktuğ; Ceylan, Yusuf (Medwell Online, 2012)Population structure, age and growth of sardine from the Eastern Black sea coasts of Turkey were examined. A total of 684 Sardina pilchardus (Walbaum, 1792) were sampled between September 2009 and April 2010 from commercial ... -
Potential habitats of an alien species (Asterias rubens Linnaeus, 1758) in the Black Sea: its current and future distribution patterns
Ceylan, Yusuf; Gül, Serkan (Springer Heidelberg, 2022)The Atlantic common starfish, Asterias rubens, has arrived firstly at the Marmara Sea in 1996 and to the Black Sea in 2007. In this study, we have exhibited the possible potential distribution of Asterias rubens throughout ...
