Yazar "Eryaşar, Ahmet Raif" için listeleme
-
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 ... -
Assessment of microplastic pollution in eleven commercial fish species in the Gulf of İzmir (Aegean Sea, eastern Mediterranean)
Eryaşar, Ahmet Raif; Mutlu, Tanju; Karaoğlu, Kaan; Veske, Erdinç; Gedik, Kenan (Elsevier, 2024)With global plastic production reaching 400 million tons in 2022, concerns about plastic pollution in the seas are increasing day by day. Therefore we focused on the abundance, characteristics, and chemical composition of ... -
An assessment of recreational spearfishing along Turkish coasts using social media
Eryaşar, Ahmet Raif (Springer, 2024)Data shared by recreational fishers can provide valuable information for scientists and fishery managers to better understand recreational fishing activities, where data collection is difficult and expensive. This study ... -
Ayrımcılık ve Eşitlik
Eryaşar, Ahmet Raif (2025)9. Hafta Ders Notu Konusu : Ayrımcılık ve Eşitlik -
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 ... -
Dürüstlük ve Şeffaflık
Eryaşar, Ahmet Raif (Dürüstlük )7. Hafta Ders Notu Konusu : Dürüstlük ve Şeffaflık -
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 ... -
Gizlilik ve Mahremiyet
Eryaşar, Ahmet Raif (2025)6. Hafta Ders Notu Konusu : Gizlilik ve Mahremiyet -
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 ...
