Gulnaz Ozcan

• PhD
• Researcher at İskenderun Technical University

The family Scyllaridae is the high-value fishery of commercially exploited species. The larva of spiny and slipper lobsters (Palinuridae and Scyllaridae respectively) can disperse during several months before metamorphosing into a benthic form. The rare planktonic phyllosoma larvae was collected by commercial fisheries trawling in the eastern M...

Urfa city, which is home to ancient civilizations with its history of 12.000 years have ecological conditions suitable for human settlement. Urfa city is also an important geography in terms of many religions. Our Prophet, the messenger of the last religion (true religion), prophet Muhammad (peace be upon him) said the following about prophet Abrah...

The ecological risk resulting from the accumulation of some heavy metals in the sediments of Iskenderun Bay was assessed using the following measures: enrichment and contamination factor, pollution load index (PLI), and potential ecological risk index (RI). The concentrations of the studied heavy metals were in the following order: Fe > Ni > Mn > C...

Kurutulan AMİK Gölü'nün bilinmeyenleri ve var olma mücadelesini konusu işlenmiştir.

ABSTRACT This study was aimed to investigate the length-weight relationship and condition factor of Acanthobrama marmid population from Güçlükonak to Cizre (Şırnak) location of Tigris River between January and December 2015. A total of 145 species of A. marmid (96 female 66.21%) and 49 males (33.73 %) were investigated. Length-weight relationship i...

Non-native African hind, Cephalopholis taeniops (Valenciennes, 1828), was for the first time recorded in the Levantine coast of Turkey (eastern Mediterranean). One specimen of C. taeniops was collected at the depths between 15 and 25 m in Iskenderun Bay

The aim of the present paper is to revise the distribution range of the invasive freshwater fish species, topmouth gudgeon Pseudorasbora parva (Temminck and Schlegel, 1846) in Turkey, based on the literature review. After the first report of the species from the Meriç River in Thrace (European part of Turkey) in 1982, it has spread across the count...

The present paper is based on the literature review and the recent information about the distribution range of the alien brown shrimp Penaeus aztecus Ives, 1891 in the Mediterranean Sea. This alien species has spread throughout the Mediterranean Sea (especially the eastern part) mainly through ship/ballast water introductions and has presently been...

The present paper is based on the literature review and the recent information about the distribution range of the alien brown shrimp Penaeus aztecus Ives, 1891 in the Mediterranean Sea. This alien species has spread throughout the Mediterranean Sea (especially the eastern part) mainly through ship/ballast water introductions and has presently been...

This study was conducted to determine the crustacean consumption behavior and preferences of the people living in the city of Kilis, Turkey. It was determined that the least preferred meat was the crustacean with 3%. The reasons for not consuming crustacea were expressed as the appearance of the crustacea. Additionally, it was also understood in th...

This study was conducted to determine the fish consumption behaviour and preferences of people living in the city of Kilis. It was determined that fish prices were found to be expensive; and sea bream, sea bass, sand smelt, catfish and carp were the most frequently preferred fish in the city. It was also determined that the preferences of the consu...

Tunceli İli Su Kaynakları ve Özelliklerinin okuyucu açısından anlaşılabilir olmasından dolayı Akarsular, Göller, Kaynaklar, Mineralli Sular ve doğanın sunduğu bir güzellik olan Şelaleler alt başlıkları şeklinde işlenecektir. Bu kitapta yerüstü suları detaylı bir şekilde incelenmiş olup, yer altı suları kısmı ise ele alınmamıştır.

In this book, the knowlegde on shrimps meals belong to exotic species and characteristics of several commercial species in İskenderun Bay and native species of the Mediterranean Ecosystem was presented.

Since Margaritifera marocana (Pallary, 1918) and M. laosensis (Lea, 1863) were rediscovered, M. homsensis (Lea, 1865) remains the only pearl mussel species known solely based on old shell samples from natural history museums. This is also the last pearl mussel species, which is absent in a phylogeny of the family. Here, we aimed to provide an integ...

The age, growth and reproduction are described for 411 individuals of abu mullet from the Orontes River in Turkey between May 2011 and April 2012. The overall male to female ratio was 1:1.29. Fork length of all individuals ranged from 2.2 to 18.5 cm and total weight from 1.85 to 66.40 g. Isometric growth was observed for males (b=2.938) and all ind...

Fish and decapod fauna of Sarıseki Stream were studied upon three separate sampling from the same location between 20-24 April 2014. Specimens of fish has been caught using an electroshocker device. Specimens of decapodes were caught by hand. Four fish species belonging to four family were identified in this locality. Identified fish sipecies are G...

Küçük Karaçay Stream is one of the important tributaries of the River Orontes (Asi) in Turkish boundaries. Previously seven species of fish have been reported to inhabit the stream. This article contributes to the addition of four species new for the ichthyofauna of the stream. Hence, with the addition of Liza abu, Gambusia affinis, Clarias gariepi...

Investigation on the seasonal and age dependent meat yield of Planiliza abu has been carried out on 299 specimens collected from Orontes River between April 2012 and March 2013. Analysis of meat yield was based on the calculation of the ratio between the body weight and the weight of organs or body parts e.g. head, fins, and internal organs. Averag...

Relationship Between Otolith Length and Fish Length of Shiraz Barb ( Capoeta umbl, Heckel, 1843 in Ikizce Stream (Şirnak) In this study, the relationships between otolith length (OL) - total length (TL), otolith width (OW) - total length (TL), otolith length (OL) – otolith width (OW) were examined for Shiraz barb [ Capoeta umbla (Heckel, 1843)] in...

This study was conducted to determine ichthyofauna of the Büyük Karaçay stream of the River Orontes drainage in Turkey (eastern Mediterranaen basin). As the result of examination of the 911 individuals collected between June 2012 and May 2013, eight fish species belonging to five families have been recorded. Of these, African catfish Clarias gariep...

This study was conducted to determine length-weight relationships and condition factors of three threatened species, Alburnus orontis (31), Capoeta barroisi (95) and Chondrostoma kinzelbachi (53), inhabiting Orontes River within Turkish boundaries. Individuals were obtained by electrofishing. Length-weight relationships were found to be W=0.001TL2....

The underlying mechanisms responsible for ecological plasticity and consequent invasive character of non-native freshwater fish species, variations in growth and life history traits in gibel carp Carassius gibelio (Bloch) were compared in natural and artificial water bodies of Turkey. Females significantly outnumbered males in all natural and most...

Morphometric characters and reproductive biology were studied in S. officinalis collected at different seasons from the Iskenderun Bay, Turkey. A total of 2006 specimens (992♀, 1014♂) were sampled from September 2005 to August using a Mediterranean type deep trawl (22 mm mesh size). Mean mantle lengths for female and male were 9.83±1.66, 9.40±1.76...

The species were collected 157 samples from 11 sampling locations in the Hatay region, Turkey, in the ecological and ichthy-faunal investigations of the Orontes River and catchment; main channel, side branches, streams, and adjacent wetlands from 2011 to 2012. A total of 284 specimens and 16 species, belonging to 15 genera and 9 families, were reco...

This study provides occurrence data of freshwater decapod species collected from 2011 to 2012. The species were collected 143 samples from 11 sampling locations in the Hatay region, Turkey (Orontes river and catchment; main channel, side branches, streams, and adjacent wetlands). The collected species belong to 3 families and 4 species were identif...

The underlying mechanisms responsible for ecological plasticity and consequent invasive character of non-native freshwater fish species, variations in growth and life history traits in gibel carp Carassius gibelio (Bloch) were compared in natural and artificial water bodies of Turkey. Females significantly outnumbered males in all natural and most...

Abstract The underlying mechanisms responsible for ecological plasticity and consequent invasive character of non‐native freshwater fish species, variations in growth and life history traits in gibel carp Carassius gibelio (Bloch) were compared in natural and artificial water bodies of Turkey. Females significantly outnumbered males in all natural...

The age, growth and maturity of Capoeta bergamae Karaman, 1969, an endemic and vulnerable fish species from western Anatolia, were studied by monthly samplings throughout January - December 2006. Females represented 44.8% and males 55.2% of the individuals. Age determinations based on scale readings show that the population has four age classes. Th...

Background. Bassan barbel, Barbus pectoralis Heckel, 1843, is widely distributed in the lakes and river systems of Turkey and its neighbouring countries. Bassan barbel is a fish species of commercial value. The aim of this study was to provide necessary biological features of bassan population from Kemer Reservoir.Materials and Methods. Biological...

The study was carried out in Kemer Reservoir and Akcay Stream between December 2004 and June 2006. Fish samples were caught by using gill nets, cast nets and electrofishing. Fifteen species belonging to 6 families were caught during the study. Four species, Acanthobrama mirabilis (47.0), Lepomis gibbosus (18.8), Chondrostoma meandrense (12.8) and B...

Maturity age, spawning time and fecundity of the Menderes Nase, Chondrostoma meandrense Elvira, 1987 were determined at Kemer Reservoir, an artificial waterbody in Western Anatolia, between January and December 2006. Males and females become mature on average at 10.6 and 11.9 cm FL and at age class 1. Spawning occurs between March and May. The numb...

Twelve specimens of Knipowitschia mermere Ahnelt, 1995 were caught in Lake Marmara between March 2007 and September 2007. K. mermere, a freshwater gobiid endemic to Turkey is threatened by extinction. It is found in one lake in western Anatolia. Gobiid populations have not been studied much, but the available data are summarised in this short revie...

Chondrostoma meandrense is an endangered freshwater fish species in Anatolia (Turkey). Its population has declined and should be strictly protected.

Length–weight relationships (LWR) were estimated for Acanthobrama mirabilis, Barbus pectoralis, Chondrostoma meandrense, Capoeta bergamae, Silurus glanis, Petroleuciscus smyrnaeus and Cyprinus carpio from the Kemer reservoir in western Anatolia, Turkey. This study is the first reference on length–weight parameters for five of these species.

The non-indigenous fish species, Prussian carp Carassius gibelio (Bloch, 1782), was first reported in the Thrace region of Turkey. The species is now established in at least 46 freshwater systems (lake, river, reservoir, lagoon and pond) of Turkey and the species' spread has been especially rapid between 1998 and 2006. Especially, this species show...

This study was carried out to determine the ichthyofauna of Kemer reservoir and Akçay stream. As a result of examining the samples collected between December 2004 and June 2006, it was revealed that 15 fish species, belonging to 6 families, were found in the basin of Kemer reservoir and Akçay stream. Among these, Lepomis gibbosus, Silurus glanis, O...

The North American centrarchid species, Lepomis gibbosus (Linnaeus, 1758), is a freshwater fish native to eastern and central North America. The species is now established in at least 28 countries of Europe and in Turkey the species' spread has been especially rapid between 2001 and 2006, with its distribution including the following areas: Kemer R...

Bu araştırmada, Kemer Baraj Gölü’nden Ocak 2006-Ağustos 2006 tarihleri arasında yakalanan Chondrostoma meandrense Elvira, 1987’nin et verimliliği ile çeşitli vücut organları arasındaki ilişkileri incelenmiştir. Araştırma sonucunda, iç organların ağırlığı/vücut ağırlığı % 15.63; baş ağırlığı/vücut ağırlığı % 11.81; yüzgeç ağırlığı/vücut ağırlığı %1....

GİRİŞ Ülkemiz su kaynakları ve bu kaynakların biyolojik çeşitlilikleri açısından zengin bir konumda bulunmaktadır. Türkiye'de bulunan 26 havzadan biri olan Büyük Menderes Nehir havzası Ege bölgesinde bulunan en büyük havza niteliğindedir. Büyük Menderes Nehir havzası (37º 11' ve 38º 49' N, 27º 11' ve 30º 53' E) Uşak, Aydın ve Denizli illerini içine...