Emrah Şimşek

Emrah Şimşek
Iskenderun Technical University · Marine Sciences and Technology Faculty, Department of Marine Technologies

PhD
Iskenderun Technical University, TURKEY

About

56
Publications
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110
Citations
Introduction
Dr. Şimşek's research and teaching is focused on marine and freshwater biology, fisheries technology and fish behaviors (especially discard fate and behavior impairment). He got his Master degree from the Department of Fisheries at Mustafa Kemal University, and Doctorate degree from the Department of Fisheries at İskenderun Technical University, in Hatay, TURKEY. He has been working as an Assistant Professor at İskenderun Technical University since 2018.

Publications

Publications (56)
Article
Full-text available
This study was aimed to determine the age and the growth parameters of the nakedband gaper Champsodon nudivittis (Ogilby, 1895). A total of 329 samples were collected from the eastern Mediterranean Coast of Turkey between October 2011 and April 2012. Lengths and weights of sampled fish ranged from 6 to 14 cm and from 1.05 and 25.08 g, respectively....
Article
Full-text available
In this study, 75 Garra rufa samples were examined to determine the feeding preference. These samples were collected from the tributaries of the Orontes River by using fyke nets, set nets, and electroshock method. G. rufa shows grazer type of nutritional characteristics. Basic nutritional regime was found to rely on phytoplanktons. When importance...
Article
Full-text available
This study was done on the use of 40 mm square mesh codend in otter trawl, the minimum measure in Mediterranean deep trout fishing in Eastern Mediterranean in accordance with European Union (EU) regulations. Brushtooth lizardfish Saurida undosquamis (Richardson, 1848) is an important catch component in this region. The lumen of the square mesh bein...
Article
Full-text available
In this study, the information of spawning season and size at first maturity for Randall's threadfin bream (Nemipterus randalli Russell, 1986) needed for the rational management of the fishing activity were obtained. To study the spawning session and size at maturity of the 217 female Randall's threadfin bream (totally 587) samples were collected f...
Article
Full-text available
The objective of the present study was to investigate some biochemical aspects (tocopherol level, micro and macro minerals, heavy metals, lipid level, and fatty acid compositions) of shark sucker caught by trawl in April in 2011 in the northeastern Mediterranean. Shark sucker has got more than 100 mg kg-1 tocopherol levels. The predominant macro mi...
Article
Full-text available
Frogs can be added to a list of different raw materials which have sustainable economic value to their producers. Therefore, the biochemical attributes of the frogs require further scientific scrutiny. The major objective of the current study is to investigate some biochemical compositions of edible portions of Pelophylax ridibundus (Pallas, 1771)...
Article
Full-text available
This study aimed to determine the age and growth parameters of the African catfish Clarias gariepinus (Burchell, 1822) from the Asi River. A total of 185 fish samples have been collected from the Asi River, located in the Eastern Mediterranean region of Turkey, from December 2018 to March 2019. Samplings were carried out with fyke-nets. Lengths and...
Article
Full-text available
This study was planned to evaluate the fisheries structure, economic value and consumption of the African catfish (Clarias gariepinus) living in the Asi River. For this purpose, the study was carried out in 3 stages between December 2018 and March 2019. In the first stage, face-to-face interviews were conducted with the local fishermen to reveal th...
Article
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Increasing plastic usage pose a significant threat to the marine environment. Many studies have been conducted to examine the amount and environmental impacts of plastic waste across the world. This study was carried out to investigate the density and quality of plastics on the sea surface and seabed of İskenderun Bay. 35 different seabed sampling...
Article
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The biological characteristics of eels from the Asi River, Turkey, were assessed between December 2017 and November 2018. Eels were sampled monthly using fyke nets (operated by professional fishermen), yielding a total of 509 specimens. Total length and weight were measured, sex, age and maturity stages (silver or yellow eel) were determined. Catch...
Article
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Marine and Life Sciences Increasing attempts have been directed to understand the negative impacts of COVID-19 on different components of human life across the World. Fisheries and aquaculture sectors which are important sectors with high potential for export in the Turkish economy were immediately hit by the crisis. In this study, therefore, the e...
Article
Full-text available
Many sectors in all around the world including fisheries have been affected from COVID-19 pandemic. The aim of this study was to evaluate the early effects of the pandemic (COVID-19) on the fishery sector that have been conducting in regional scale considering the fishery sector in Hatay province from Turkey. A series of interviews were accomplishe...
Article
Full-text available
The study was conducted to determine the age and the growth of the Lessepsian migrant Randall’s threadfin bream, Nemipterus randalli (Russell, 1986). A total of 587 samples were collected from the eastern Mediterranean coast of Turkey between February 2012 and January 2013. Total length and total weight ranged from 7.7 to 21.0 cm and from 6.90 and...
Article
Full-text available
The aim of this study is to analyze the changes of economic fish species in the Iskenderun Bay by providing life and conservation area for fish species. Therefore, the study was carried out by building 172 artificial reefs (150 cubic and 22 octagonal) in September 2013, on the southern coastline of the Iskenderun Bay 7-8 m in depths far from the 30...
Conference Paper
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Aegean is the one of the most important region in terms of aquaculture. Therefore, decision support rules have been established for each city locating in that region to support decisions on strategic level for the aquaculture by taking into consideration the project capacities, type and production methods of the facilities. Random-tree algorithm, w...
Conference Paper
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Bu çalışmada Lithognathus mormyrus türünün trol simülasyonu denemelerinde farklı deniz suyu sıcaklığı ve trol çekim hızına göre davranış bozukluğu ve canlı kalma oranları tespit edilmeye çalışılmıştır. Çalışma İskenderun Teknik Üniversitesi, Deniz Bilimleri ve Teknolojisi Fakültesi, Balık Davranış Laboratuvarında gerçekleştirilmiştir. Çalışmada far...
Conference Paper
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ZET Hayalet avcılık, kaybolmuş ya da terk edilmiş ancak su içerisinde işlevini sürdürerek, insan kontrolü olmaksızın sucul organizmaların ölümüne neden olan av araçlarının gerçekleştirdiği avcılığı ifade etmektedir. İskenderun Körfezi'nin geniş bir kıta sahanlığına, büyük bir av sahasına sahip olduğu ve dip yapısının; çayır, kayalık ve kumsal alanl...
Conference Paper
Full-text available
With the increase in the number of people engaged in sportive line fishing in the Iskenderun Bay, there is a continuous increase in the diversity of this activity. Biodiversity, the suitability of climate and sea conditions in the region and the young demographic structure are considered as important issues in the increase of this activity. In this...
Conference Paper
Full-text available
It is of great importance to determine the phosphorus capacity of water resources to carry farms for the sustainability of fish farms which produce approximately 250 thousand tons of aquaculture annually in Turkey's lakes and dams. The transformation of the trophic state of water bodies from mesotrophic to eutrophic is an indication that the dam ha...
Conference Paper
Full-text available
In this study, commercial fishing activities with amateur fishing license boat were analyzed in Therefore, the study aimed at all fishermen in Iskenderun fishing port, who do not have commercial fishing license. In this context, the study was conducted by using face-to-face interviews. With face-to-face interviews with these people, catch per unit...
Conference Paper
Full-text available
The aim of the study is to determine closed areas for fishing (CAF) from Iskenderun Bay and to evaluate illegal fishing activities in these areas. For this purpose, in this study, closed areas for fishing in Iskenderun Bay such as port, pier, shelter, and military areas were classified and determined. Then, the total marine area in these areas was...
Conference Paper
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The Eastern Mediterranean has been a major dispute for many years. Moreover, the Arab Spring and the Syrian War increased the uncertainties in the region. The economic limits arising from oil and natural gas reserves in the region have not understood between the coastal states. The lack of management created by these disputes negatively affects fis...
Article
Full-text available
This study investigated the differences of selectivity between a plain codend and a codend surrounded with a protective bag. The experiments were carried out in the İskenderun Bay, located in the eastern Mediterranean Sea, between 15 January and 15 March 2012, when the amount of trawl catch was the lowest in the fishing season. The experiments were...
Patent
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Bu buluş, farklı derinliklerden avlanan ve canlı kalması istenen balıkların basınçlı ortamda barotravma tedavisi ile ilgilidir. Barotravma tedavisi uygulanması için üretilen portatif basınç akvaryumu, üzerinde 4 adet pleksi görüş penceresi (10) ve bir adet kapak (6) bulunan çekme çelik tanktır. Portatif basınç akvaryumuna dışarıdan basınç uygulanma...
Article
Full-text available
This study aims to bring to light behavioral impairment and the delayed mortality of discards below legal catch rate in a simulated trawl operation. Behavioral impairment of 126 fish in the aftermath of trawling operation was tested in two different methods through observing their reflexes. In the first method, all the fish in the tank was compared...
Article
Full-text available
The discard and its losses is an important issue with the principles of sustainable and responsible fishery for researchers and the fishing technology. In this study, discard fate, which is caught and released into the sea by discarding in the Iskenderun Bay trawl fishery, was investigated. Small individuals of Nemipterus randalli (N: 340), Sparus...
Article
Full-text available
The study objective was to investigate the chemical composition of otoliths of two Lessepsian fish migrants, namely, Champsodon nudivittis and Nemipterus randalli, which thrive in the Iskenderun Bay, Turkey. The study specifically investigated the age structure and explored differences in chemical otolith composition in relation to age. Samples wer...
Thesis
Full-text available
In this study, a series of commercial and experimental studies were carried out on factors that predict and affect the discard mortality, an important issue of fisheries management. The effects of mortality rates and pressure treatment on survival rate were observed in commercial trawl operations. Virtual fishing experiments were carried out in lab...
Conference Paper
Full-text available
Demersal fish species are subject to sudden pressure drop in the fishery when they come to the surface from the bottom. Fish affected by barotrauma often do not survive when release in to the sea again. In this study, different release devices were used to barotrauma treatment and performance of these devices were compared according to depth and fi...
Conference Paper
Full-text available
Shrimp trawl fishery is an essential topic for fisheries management with characterized by low selectivity ratio. Trawl fishery is an intensive fishery method especially for shrimp species with high economic value. Different sorting grid methods are widely used in the world to increase shrimp trawl selectivity. In this study, sorting grid model, bar...
Conference Paper
Full-text available
Fishing products of catching is a important issue in maritime industry. Vessels and fishing ports includes the basic infrastructure of this seafood production. Fishing ports not only is a location for harbor of vessels, but also are the maintenance area for fishing vessels and fishing gear, landing of fishing products and are providing area of all...
Conference Paper
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Selectivity in trawl fisheries is an important issue to be addressed for the sustainability of the ecosystem. Selectivity is providing sustainability of the stocks by giving the species caught unintentionally or not-yet-reached the sexual maturity stage the chance to survive. In order to increase the sustainability of the resources this study is th...
Poster
Full-text available
The aim of this study is to analyze the changes of economic fish species in the in İskenderun Bay by providing life and conservation area for fish species. The study was carried out on the southern coastline of the Iskenderun Bay, located in the Eastern Mediterranean, under artificial reefing. The methods of counting and the number of fish species...
Article
Full-text available
This study was investigated between February and September 2017 in Iskenderun Bay. The main purpose is to offer suggestions of solving problems about pufferfish's harmful effects on longline fishery. In order to explain problems, 8 longline fishing operation (400-needle) was made in Iskenderun Bay. Pufferfish species has been found in these operati...
Article
Full-text available
Pufferfish poisoning is generally caused by digestion of a toxin called tetrodotoxins which is found naturally and generally in some pufferfish species but also some other species e.g., gastropod mollusk, the eggs of horseshoe craps, skin of atelopid frogs, blue-ringed octopus. On the other hand, saxitoxin is generally known to be caused by toxic s...
Article
Full-text available
Pufferfish, a species of indo-pacific origin entered the Mediterranean with the opening of the Suez Canal. It has become one of the dominant alien fish species, spreading to the Mediterranean and has a change to reproduce in excessive amount. Pufferfish luckily find many available food resources but less predator. Because of this imbalanced prey-pr...
Article
Full-text available
This study observed the factors that influence the fate of groupers which release after fishing operations. These factors, which lead to behavioral impairment after fishing, is classified fatigue, temperature shock, barotrauma, exposure to air and a human contact. Evaluation was tried to put forward by examining the levels of cortisol T3 and T4 in...
Conference Paper
Full-text available
Bu çalışmada Hatay sahillerinde (Konacık- Samandağ arası) yaygın olarak kullanılan bir olta balıkçılığı hakkında bilgiler verilmektedir. Bu olta balıkçılığı yöntemi bölgede ticari balıkçıların yanı sıra rekreasyonel balıkçılar tarafından da talep görmektedir. Bu sistem kıyıdan denize olan rüzgarlardan (kara meltemleri) yararlanılarak sabah erken sa...
Conference Paper
Full-text available
Hatay kıyıları birçok balık ve diğer deniz canlı türleri için üreme ve beslenme alanlarıdır. Ancak gelişen balıkçılık teknolojisi ile Hatay kıyılarında aşırı avcılık söz konusudur. Hatay kıyılarının hoyratça kullanımı sonucu denizde kalan balık ağları ile kaplı hale getirmiştir. Bu ağların deniz dibinden çıkarılması amaçlanmakta, ulusal ve uluslara...
Article
Full-text available
Fish otoliths are inert aragonite structures characterized with metabolic changes depending on physical and chemical properties of the environment. An otolith grows with elements and components in the environment which layers up on each other on the growth layer. The growth starts as a spawn and continues throughout maturation and until death and t...
Article
Full-text available
Araştırmanın amacı, İskenderun Balıkçı Barı-nağında faalyet gösteren balıkçıların sosyo-ekono-mk yapılarının ortaya konmasıdır. Ayrıca balıkçılık faalyetler kapsamında av aracının teknk özellk-ler, avcılık süres, avcılık sahasının belrlenmes, av mktarının tahmn edlmes gb konularda ele alınmıştır. Araştırma sahası İskenderun Balıkçı Barınağıyla sını...
Article
Full-text available
Fish otoliths are inert aragonite structures characterized with metabolic changes depending on physical and chemical properties of the environment. An otolith grows with elements and components in the environment which layers up on each other on the growth layer. The growth starts as a spawn and continues throughout maturation and until death and t...
Article
Full-text available
Bu araştırmada, İskenderun bölgesindeki taze su ürünlerinin pazarlama yapısı incelenmiştir. Su ürünlerinin perakende satışını yapan işletmelerin, ürünlerini nasıl tedarik ettikleri ve tüketiciye ne şekilde sundukları hakkında bilgiler edinilmeye çalışılmıştır. İşletmelerin pazarlama yapıları incelenirken perakende ticaret yapan işletmelerin kendile...
Conference Paper
Full-text available
Objective: The objective of this research was to investigate the effect of different catching methods on the shelf life of gilthead sea bream. Three catching method are trawl, purse siene, and fishhook. Methods: The fish caught with different catching method were stored in ice. The experiments were carried out on the 1th, 4th, 7th, 10th, 14th, 18t...
Conference Paper
Full-text available
Kıyı balıkçılığının yoğun olduğu bölgelerde çözüm bekleyen konulardan biri doğal resif alanlarının korunması ve hayalet ağlardır. Resifler birçok balık ve diğer deniz canlı türleri için üreme ve beslenme alanlarıdır. Bu sahalardaki tür zenginliği doğal hayatın devamlılığı açısından büyük önem arz edip mutlaka korunmalıdır. Aşırı avcılık ve azalan s...
Conference Paper
Full-text available
Denizel canlı kaynaklar kullanımında ekosistemin korunması ve sürdürülebilirlik kavramları öne çıkmaktadır. Trol balıkçılığı demersal kaynakların kullanımında en önemli av aracı olarak karşımıza çıkmaktadır Trol balıkçılığının canlıya etkisi olan birçok faktörü vardır. Bu faktörlerin başında basınç değişikliği gelmektedir. Trol balıkçılığında basın...
Conference Paper
Full-text available
Iskarta ölümleri çok farklı yönleriyle balıkçılık yönetimi için araştırılması gereken bir konudur. Iskarta edilen deniz canlılarının yaşamına devam etme ihtimali ve oranı bilinmemektedir. Gerek bu bilinmeyen durum gerekse de avcılık operasyonundan kaynaklanan ıskarta ölümlerinin azaltılması için avcılık esnasında ve sonrasında oluşan stresten kayna...
Conference Paper
Full-text available
Sürdürülebilir balıkçılık için boy seçiciliğinin sağlanması esas faktördür. Bu ise yasal düzenlemede asgari göz açıklığı uygulaması ile mümkündür. Göz açıklığının ölçülmesi teknik bir konu olup uluslararası standartlarda nasıl yapılacağı açıklanmıştır. Bu standartlar: göz açıklığı tanımı, ölçüm aracı ve yöntemi olarak belirlenmiştir. Fakat ülkemizd...
Thesis
Full-text available
The mortality rate of discards is an event which needs to be studied in various aspects. For fishery management the rate and the posibility of survival for the aquatic organism already discarded is unclear. Therefore it is important that the mortality rate and behavioral disorders caused by the stres occuring both during and after the fishing opera...

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