Kurum Yazarı "Eryaşar, Ahmet Raif" WoS İndeksli Yayınlar Koleksiyonu İçin Listeleme
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Analyzing recreational angling and spearfishing for white grouper (Epinephelus aeneus) in the north-eastern mediterranean using YouTube data
Eryaşar, Ahmet Raif (Springer, 2024)In terms of sustainable fisheries management, there are serious problems in monitoring and collecting data on recreational fishing activities. Therefore, as a digital data source, the use of citizen science based on social ... -
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 broad-scale microplastic distribution in surface water and sediments along Northeastern Mediterranean shoreline
Gedik, Kenan; Eryaşar, Ahmet Raif; Öztürk, Rafet Çağrı; Mutlu, Erhan; Karaoğlu, Kaan; Şahin, Ahmet; Özvarol, Yaşar (Elsevier, 2022)Plastics manufactured to fulfil the unique demands of civilization accumulate in the sea due to their durability. Microplastics (MP) pose a greater threat than macroplastics as they can easily enter the aquatic environment ... -
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 ... -
Catch composition of trawl fisheries in Mersin Bay with emphasis on catch biodiversity
Gökçe, Gökhan; Saygu, İsmet; Eryaşar, Ahmet Raif (2016)This study presents the catch composition and biodiversity of Mersin Bay, northeastern Mediterranean, which is an important fishing ground for demersal trawls. A total of 182 hauls were performed on board a commercial ... -
Characteristics and temporal trends of microplastics in the coastal area in the Southern Black Sea over the past decade
Eryaşar, Ahmet Raif; Gedik, Kenan; Şahin, Ahmet; Öztürk, Rafet Çağrı; Yılmaz, Fatih (Elsevier, 2021)Time-series datasets showing the gradual conformational change in the status and characteristics of microplastics (MP) in marine waters are needed to protect vulnerable marine ecosystems. In this study, the abundance, ... -
Discard reduction of trammel nets in the Northeastern Mediterranean prawn fishery
Gökçe, Gökhan; Bozağlu, Adem Sezai; Eryaşar, Ahmet Raif; Özbilgin, Hüseyin (Wiley-Blackwell, 2016)In this study the effects on the discard reduction of guarding net rigged prawn trammel nets were examined with the focus on catch composition and income of fishermen for the Mersin Bay small-scale prawn fishery. A total ... -
Effects of square-mesh codend on the benthic by-catch for the beam trawl fisheries of veined rapa whelk, rapana venosa
Eryaşar, Ahmet Raif (Wydawnictwo Akad Rolniczej W Szczecinie, 2018)Background. the beam trawl fisheries of veined rapa whelk, Rapana venosa (Valenciennes, 1846), cause small benthic organisms to be captured and also damage the other species living on the seafloor. To solve this problem, ... -
Gel-form bait made from fish waste: Can be a potential alternative to commercial bait for handline fishing?
Eryaşar, Ahmet Raif; Koral, Serkan (Springer, 2023)The fillet wastes of Rainbow trout (Oncorhynchus mykiss), one of the most important species for mariculture in Türkiye, are only given to fish meal oil factories during the anchovy season. The rest of the time, they are ... -
Grid-net design that successfully reduces discarded catch and damage to benthic species in the veined rapa whelk beam trawl fishery
Eryaşar, Ahmet Raif (Taylor & Francis Ltd., 2022)In this study, a grid-net design (GND) with three different bar spacings was compared with the commercial beam trawl used in the veined rapa whelk fishery to minimize the discarded catch amount and the loss of commercial ... -
The importance of alien species to the food web and bottom trawl fisheries of the Northeastern Mediterranean, a modelling approach
Saygu, İsmet; Heymans, Johanna J.; Fox, Clive J.; Özbilgin, Hüseyin; Eryaşar, Ahmet Raif; Gökçe, Gökhan (Elsevier, 2020)Alien species and bottom trawl fisheries are of significant concern in the Eastern Mediterranean as both can put pressure on coastal systems whilst some alien species also constitute an important component of the trawl ... -
The influence of twine tenacity, thickness and bending stiffness on codend selectivity
O'Neill, Finbarr G.; Kynoch, Robert J.; Blackadder, Lynda; Fryer, Robert John; Eryaşar, Ahmet Raif; Notti, Emilio; Sala, Antonello (Elsevier, 2016)We report on trials which measured the selectivity of haddock (Melanogrammus aeglefinus) and plaice (Pleuronectes platessa) in codends made from netting materials classified by the manufacturers as low, medium and high ... -
Ingestion of microplastics by commercial fish species from the southern Black Sea coast
Eryaşar, Ahmet Raif; Gedik, Kenan; Mutlu, Tanju (Elsevier, 2022)Microplastic (MP) contamination is a serious threat to today's marine life. Therefore, this study investigates MP ingestion in three commercial fish species (European anchovy Engraulis encrasicolus, whiting Merlangius ... -
The microplastic pattern of wild-caught Mediterranean mussels from the Marmara Sea
Gedik, Kenan; Eryaşar, Ahmet Raif; Gözler, Mutlu (Elsevier, 2022)The Sea of Marmara suffers from pollutants that come from municipal/industrial discharges and the Black Sea. Microplastic (MP)s, a rising environmental concern with consequences for seafood safety, are one of these ... -
Microplastic pollution profile of Mediterranean mussels (Mytilus galloprovincialis) collected along the Turkish coasts
Gedik, Kenan; Eryaşar, Ahmet Raif (Pergamon-Elsevier Science Ltd, 2020)Plastics profoundly threatens ecological balance in marine ecosystems across the globe in the current era of industrialization. Microplastics (MP), in particular, can pose risks reaching humans through the food web via ... -
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 ... -
A novel grid-net design to eliminate bycatch in beam trawl fishing for the veined rapa whelk in the south-eastern Black Sea
Eryaşar, Ahmet Raif (Natl Centre Marine Research, 2018)Beam trawl fisheries in the Black Sea target the veined rapa whelk (Rapana venosa) while other species of fish and crabs are returned to the sea dead or alive. Smaller bivalves and crabs are also packed with the catch ... -
A preliminary study on whiting (Merlangius merlangus) behaviour to bottom-set pot in the Black Sea
Eryaşar, Ahmet Raif (Parlar Scientific Publications (P S P), 2018)Due to overfishing and decreasing in fish stocks, interactions between dolphins and deep gill nets have increased rapidly in recent years for the Black Sea. Dolphin-inflicted damage to fishing gear and catch losses have ... -
Selectivity of monofilament gillnets with different mesh sizes used in fishing of pearl mullet, (Alburnus tarichi (Guldenstadt, 1814)) in Lake Van
Akkuş, Mustafa; Bozaoğlu, Adem Sezai; Eryaşar, Ahmet Raif (Ege University, 2023)This study was carried out between September 2020 and March 2021 to determine the selectivity of monofilament gillnets used in pearl mullet, Alburnus tarichi (Güldenstädt, 1814), fishing in Lake Van. The SELECT method was ... -
Using social media to identify recreational bluefish angling in the Mediterranean and Black Sea
Eryaşar, Ahmet Raif; Saygu, İsmet (Elsevier, 2021)Filling the information gap on recreational fisheries is an important challenge due to difficulties in monitoring and collecting data. The use of citizen science based on social media has recently emerged as a digital data ...