Fahrettin Küçük

The present study aims to provide a comprehensive comparative analysis of the vertebral column, fin structure and caudal skeleton of 21 species of Pseudophoxinus and Egirdira nigra (Family: Leuciscidae) collected from various freshwater locations across Türkiye. Using mammographic imaging, eight distinct characteristics of the vertebral column and...

The present study aimed to identify and characterize the hydroid fauna in the Gulf of Antalya, Türkiye. This paper reports 35 taxa belonging to 17 families identified in the region. Among the identified species, Clytia brevithecata, Clytia noliformis, Turritopsis nutricula, Scandia gigas and Acauloides ammisatum were recorded for the first time on...

Invasive species present a serious peril to aquatic ecosystems worldwide, thus it is essential to have a comprehensive understanding of the reproductive dynamics, spreading characteristics, and biological properties of these species in order to effectively manage their population structure and mitigate both the ecological damage and economic loss t...

Abnormal specimens of Egirdira nigra were gathered from Eğirdir Lake, Akkeçili Village, Türkiye, during standard ichthyological investigations in the area from May-September 2021. These specimens exhibited irregularities in the dorsal and pelvic fin. The abnormalities noted in these fins encompass the complete absence of the fin and various degrees...

Objective: In this study, various characteristics of the Eğirdir minnow, an endemic species of Anatolia that inhabits specific/narrow areas, were determined from 142 individuals sampled between 2021 and 2022. These characteristics include length-weight relationship, Von Bertalanffy growth equation, condition factors, spawning season, first spawning...

The bilateral asymmetry was analysed on 259 fish specimens comprising six Barbus species collected in June-August 2010 from rivers in western Anatolia. The goals of this study are: (1) to check for the levels of bilateral asymmetry amid the ten morphological features of the six Barbus species and (2) to compare the levels of this asymmetry among th...

In the latest scientific records, it has been determined that the freshwater ichthyofauna of Turkey consists of 427 species and 215 species (50.4%) of these are endemic to Turkey. Seminemacheilus genus from the Nemacheilidae family, distributed in the inland waters of Turkey, is represented by 6 species. Seminemacheilus ispartensis (Erk'akan, Nalba...

Salmo ekmekciae, new species, is described from the Köprüçay River, a drainage of Mediterranean Sea. It is distinguished from Salmo species in adjacent water by having 9–10 parr marks on flank; 11–13 scale rows between end of base of adipose-fin and lateral line; 22–24 gill rakers on first gill arch; a shorter distance between adipose-fin and cauda...

Objective: Pseudophoxinus battalgilae is one of two species with the widest distribution of the genus in the Central and Southern Anatolia (Manavgat River) regions, the other being Pseudophoxinus firati. The species description was made based on samples from the Beyşehir Lake basin. Records are found from Suğla Lake (Seydişehir); the Akgöl (Ereğli)...

This study was conducted with seasonal samplings to determine the distribution of hydroid polyp fauna in eight different stations along the Antalya Bay coastline. Samples were collected from the upper infralittoral zone using apnea diving, and some physicochemical and biological characteristics of the environment (salinity, temperature, dissolved o...

Giriş: Çalışmamızda Anadolu’nun nokta/dar bölge endemiklerin olan Eğirdir yağbalığı, Egirdira nigra popülasyonunun 2021-2022 yılları arasında örneklenen 142 adet birey üzerinden; boy-ağırlık ilişkisi, Von Bertalaffy büyüme denklemi, Kondisyon faktörü, üreme dönemi, ilk üreme boyu, fekondite özellikleri belirlenmiştir. Bulgular: Örneklenen E.nigra p...

Giriş: Çalışmamızda, ülkemiz içsularındaki yabancı/istilacılar içerisinde en yaygın türlerden olan Çakıl balığı, Pseudorasbora parva (Temminck & Schlegel, 1846)’nın ticari balıkçılığın yapıldığı Beyşehir ve Eğirdir gölleri ile yapay bir gölet olan Onaç Baraj Gölü (Bucak-Burdur) olmak üzere 3 farklı ekosistemdeki popülasyonlarının büyüme özellikleri...

Barbus ida, a new species, is described from the streams Gönen and Biga, in western Anatolia. It is distinguished from other Barbus species in the adjacent basins by a less thickened last unbranched dorsal-fin ray, serrated along the proximal half of its posterior margin; larger irregular black blotches on the back and the flanks, and small black s...

In this study, the change in fish fauna was examined from 1925 to the present, when the first scientific records were given in Akgöl-Ereğli Marshes, one of the largest wetlands of the Konya Closed Basin. In the first ichthyofaunistic study, Acanthorutilus anatolicis, Varicorhinus kemali, and Rutilius tricolor were described by Hanko (1925) on the...

Susurluk Basin is under intense pressure from domestic, industrial wastes and agricultural activities. In this study, the effect of environmental factors on Simav Stream, one of the important rivers of the Susurluk Basin, was tried to be determined. In this purpose water samples were taken from 13 satation seasonally in 2014-2015, and water quality...

The genus Chondrostoma (Leuciscidae: Leuciscinae), composed of small to medium-sized fish with a scraper feeding characteristic, is distributed in the West and Middle East, Caucasus, Europe and Northern Mediterranean drainages. This genus spreads across Anatolia and Thrace, with the exception of Göksu and Eşen rivers in Turkey’s Mediterranean basin...

Beyşehir Lake, located in one of the important karstic discharge basins of the Anatolian Plate, is Turkey's largest freshwater lake with a surface area of 703 km2, and is a very important wetland in terms of bio-ecological, socio-economic and cultural aspects. Although the first records on Beyşehir Lake fishery date back to the 1910’s, the first sc...

Anadolu'dan ilk alabalık kaydı, Abold (1835) tarafından Trabzon ve Erzurum yakınlarındaki akarsulardan verilmiştir. Tortonese (1955) tarafından Anadoludaki alabalıklar; Salmo trutta abanticus (Abant Gölü), S. trutta labrax (Çoruh Irmağı, Çıldır Gölü ve Uludağ), S. trutta caspius (Kura Irmağı) ve S. trutta macrostigma (Çoruh ve Çatak, Dicle Nehri) o...

The Göksu River, fed by the Central Taurus karst areas, is the largest river of the Eastern Mediterranean Basin flowing into the Mediterranean. In this study, within the scope of the samples and observations we made on different dates between 2014-2017, and in the light of other research findings; the current taxonomic status of the Göksu River fis...

Turcichondrostoma, a new genus, from the Southwestern Anatolia is distinguished by having fewer gill rakers on first gill arch and morphologies of premaxilla and dentary bones. In addition, as a result of the phylogenetic analyses based on combine data set (mtDNA COI + Cytb) sequences (1706 bp.), Turcichondrostoma genus was recovered with high post...

Giriş: Beyşehir Gölü ülkemizin en büyük doğal tatlısu kaynağı olması nedeniyle gerek biyolojik çeşitlilik, gerekse ekonomik açılardan çok önemli değere sahiptir. Buna karşın başta yoğun balıkçılık, göl seviyesinin azalması, yabancı/istilacı tür girişi ve aşırı makrofit gelişimi gibi baskıların etkisindedir. Bu çalışmamızda, Beyşehir Gölü balıkçılığ...

Giriş: Ülkemizde 23 türü bulunan Pseudophoxinus'un türleşme merkezi olarak kabul edilen Orta Anadolu ve Göller Bölgesi; özel jeolojik oluşumlardan kaynaklanan açık ve kapalı havza özelliğinde çok sayıda tatlı, acı ve tuzlusu ekosistemlerine sahiptir. Sözü edilen bölgedeki ekosistem çeşitliliğini gösteren 23 gölden 5'i günümüzde tamamen kurumuş, aka...

The aim of study is to determine the length-weight relationship of freshwater fish species in the Gediz River basin lentic system. Fish samples were collected between November 2016 and April 2017 using multi mesh gillnets and beach seine nets from six different locations in the Gediz River basin lentic system. Length–weight relationship was estimat...

Chondrostoma smyrnae , a new species, from the Tahtalı reservoir drainage is distinguished by having a slightly arched lower jaw with a well-developed keratinised edge, a deep and cylindric body, a complete lateral line with 47–52+1 total scales, 8–9 scale rows between the lateral line and the dorsal-fin origin, 4 scale rows between the lateral lin...

The aim of study is to determine the length-weight relationship of freshwater fish species in the Gediz River basin lentic system. Fish samples were collected between November 2016 and April 2017 using multi mesh gillnets and beach seine nets from six different locations in the Gediz River basin lentic system. Length–weight relationship was estimat...

The changes of fish fauna of Manavgat River, which is the largest of the karstic discharge systems in the Western Taurus Mountains, were examined over a period of 25 years between 1995 and 2020 and the 20 taxa belonging to 9 families were determined in the river.9 of these are endemic (4 endemic species outside the basin), 4 are nonnative 1 is nati...

The molecular phylogeny of the Anatolian species of the genus Chondrostoma (Cypriniformes:Leuciscidae) was studied by sequencing of the mitochondrial cyt b gene. A total of 144 tissue samples from 14 described species were collected from 35 different localities in Turkey. In total, 74 cyt b haplotypes were identified. Haplotype network construction...

In this study, the phylogeny of Alburnus genus distributed in Turkish freshwaters was performed by analyzing mitochondrial cyt b gene (1141 bp) and COI gene (1551 bp) sequences from 1172 samples representing 112 populations of 24 species through their geographical distribution. According to our findings, 20 valid species are distributed in Turkey o...

This study was carried out to determine the fish fauna of the Dalaman River and to compare with the neighboring basins from a zoogeographical point of view. In order to establish the taxonomic and zoogeographic features of the Dalaman River Basin’s (Turkey) fish fauna, samples were collected using electrofishing, gill nets (mesh size of 9x9 mm and...

Barbus xanthos, a new species, is described from the Eşen, Dalaman, Tersakan and Büyük Menderes rivers in south‐western Anatolia. It differs from other Barbus species in the adjacent basins by having 53–60 lateral line scales, a weakly ossified last unbranched dorsal‐fin ray (about 33–50%), numerous small irregular‐shaped black or dark‐brown spots...

The surveys were conducted between 2005-2019 to assess endemic fish species in the Lake Beyşehir that have special importance in terms of endemism. A total of 12 endemic freshwater fish species (Aphanius cf. iconii, Capoeta mauricii, Chondrostoma beysehirense, Garra kemali, Gobio microlepidotus, Pseudophoxinus anatolicus, Pseudophoxinus battalgilae...

In the scope of this study, exact distribution of the two endemic Capoeta species in the Turkish Mediterranean Sea drainages was presented. Fishes were caught with pulsed DC electro-fishing equipment from 28 sampling sites throughout Turkish Mediterranean Sea drainages between Göksu River and stream Boğa. The findings of the study demonstrate that...

The population structure of Chondrostoma fahirae (Ladiges, 1960) was studied based on 85 specimens. Males made up 60.0% (51) and females 40.0% (34) of the population. The length-weight relationship and Von Bertalanffy growth equation were estimated as W = 0.019 x L3.0761 r = 0.983, Lt = 15.62 (1 – e –0.17 ( t+3.06)), respectively. Gammarus pulex, a...

In consideration of the scientific records and current observations obtained from the early 1980s until today in order to investigate the eel migrations in the main streams of Antalya Gulf, we here reviewed the changes in the elvers arrival into the streams, how habitats have changed until today, and the anthropogenic pressures on habitats. Elvers...

The morphometric and biometric characteristics of European eel living in Köyceğiz Lagoon which is located on the Aegean were investigated. The specimens were collected using fyke nets and by electroshock in 2016, 2017 and 2018 from lakes, canals and streams in the lagoon system. Silver eels are smaller than the other populations.

The morphometric and biometric characteristics of European eel living in Köyceğiz Lagoon which is located on the Aegean were investigated. The specimens were collected using fyke nets and by electroshock in 2016, 2017 and 2018 from lakes, canals and streams in the lagoon system. Silver eels are smaller than the other populations.

The morphometric and biometric characteristics of European eel living in Köyceğiz Lagoon which is located on the Aegean were investigated. The specimens were collected using fyke nets and by electroshock in 2016, 2017 and 2018 from lakes, canals and streams in the lagoon system. Silver eels are smaller than the other populations.

In a study of the fishes of the Büyük Menderes River Basin, Aegean region of Turkey, two populations of Chondrostoma were found which showed clearly distinctive characters: the population from the Upper B. Menderes (Işıklı Lake) was attributed to C. meandrense Elvira, 1987, while the population from the Çine Stream in the Lower B. Menderes River ba...

Introduction: According to the latest recording, it is known to live more than 360 species of fish in Turkish inlandwaters. Of these, 158 (42%) were endemic, 28 (8%) were alien / invasive, while 3 were extinct. However, about 1/3 of our inland fish, which are formed by endemic taxa, it is constantly expressed that populations of our vulnerable spec...

Petroleuciscus ninae sp. nov. is described from the Büyük Menderes River drainage. The new species is distinguished by having a black lateral stripe from head to base of caudal fin, stripe distinct anteriorly and posteriorly, wider than eye diameter; numerous black pigments on anal-fin rays; body depth at dorsal-fin origin 27–30% standard length (L...

Endemic Species of the Genus Pseudophoxinus (Teleostei: Cyprinidae) in Anatolia and Distribution Areas Salim Serkan Güçlü, Fahrettin Küçük Faculty of Eğirdir Fisheries and Aquatic Sciences, Süleyman Demirel University, ISPARTA-TURKEY salimguclu@sdu.edu.tr Objective: Spring minnows of the cyprinid genus Pseudophoxinus are distributed from Central An...

Objective: The eels enter the inland of countries that are coastal to the Mediterranean, completing their growth and development. However, obstacles such as hydroelectric power plant (HEPP), dams and irrigation regulators, vital wishes such as breeding and feeding of eels are prevented. The eels (Anguilla anguilla) are Critically Endangered A2bd+4b...

Introduction:Here, we aim to examine the success in implementing an Action Plan prepared for the inland fishes of Beyşehir sirazbalığı (C. maur icii) and Nasreddin bleak (A. nasreddini) endemic to Turkey within the scope of the “Strategic Action Plan to Protect Endangered Species” prepared by Ministry of Forestry and Water Affairs, General Director...

In this research, the current systematic status of endemic Anatolian species, Alburnus nasreddini, has been enlightened by making its morphological description and comparing it with the closest species, A. escherichii. This species has distinguished from the closest species, A. escherichii, by fever perforated scales along lateral line (44-48 vs. 4...

Capoeta aydinensis, new species, is described from the Büyük Menderes River and the streams Tersakan and Namnam in south-western Turkey. It is distinguished from all other Anatolian Capoeta species by a combination of characters as: one pair of barbels; a plain brownish body coloration; a well-developed keel in front of the dorsal-fin origin; a sli...

Chondrostoma toros sp.n. is described from the Göksu River. It is distinguished by a slightly arched lower jaw with a well - developed keratinized edge ; a slightly developed keel in front of the dorsal - fin origin; lateral line with 56 – 64 + 1 – 3 scales; and 25 – 30 gill - rakers on outer side of first gill arch. Chondrostoma ceyhanensis sp.n....

Economic analysis of enterprises farming trout in cage and ponds Korkuteli District was carried out. The data on economical features of the enterprises were obtained from 2015 surveys. Mean annual rainbow trout (Oncorhynchus mykiss) production in cage enterprises is 67 tons, while in the land enterprises it is 14 tons. 250 g trouts on average has...

Pseudophoxinus iconii, a new species, is described from Cihanbeyli (Lake Tuz Basin, Konya, Central Anatolia, Turkey).It differs from other Central Anatolian Pseudophoxinus species (P. anatolicus, P. battalgilae, P. crassus, P. hittitorum)by the following characters: absence of a keel between the pelvic fin and anus; mouth terminal (upper lip equal...

Bu çalışma ile geçmişte Konya Kapalı Havzası'nın en büyük sulak alanlanndan birisi olan Akgöl (ve Ereğli sazlıkları)'ün, ilk bilimsel çalışmanın yapıldığı l 924'den günümüze kadar, hidrolojik yapısındaki değişim sürecine koşut olarak balık faunasının değişimi irdelenmiştir. Günümüzde çok büyük bir kısmı kurumuş olan gölde, 1924 tarihinde Macar bili...

Background. Capoeta pestai (Pietschmann, 1933) is commercially important fi sh species in Turkey. The knowledge of the biology of this species is very scarce. This species has a ‘critically endangered’ status on the IUCN Red List. The objective of this study was to determine the age and growth rates of C. pestai, and to evaluate whether otolith morp...

Hemigrammocapoeta menderesensis is distinguished from all other species of Hemigrammocapoeta in Anatolia by the following combination of characters (none unique to the species): lateral line incomplete; 6-17 perforated scales and 36- 41 +1-2 scales in lateral series; 71/2-81/2 scale rows between lateral line and dorsal-fin origin, 3-4 scale rows be...

Pseudophoxinus mehmeti, new cyprinid species from the Alanköy basin in southwestern Turkey, is distinguished from all species of Pseudophoxinus in adjacent regions by the combination of the following characters: body slender, its length 1.3–1.5 times its depth; caudal peduncle length 1.6–2.0 times its depth; mouth almost superior, with the tip of t...

Hemigrammocapoeta menderesensis is distinguished from all other species of Hemigrammocapoeta in Anatolia by the following combination of characters (none unique to the species): lateral line incomplete; 6–17 perforated scales and 36– 41 +1–2 scales in lateral series; 7½–8½ scale rows between lateral line and dorsal-fin origin, 3–4 scale rows betwee...

Aims: This study was carried out to determine the fish fauna in the Gediz River and by comparing the fish fauna with that of neighboring basins from a zoogeographical point of view. Place and Duration of Study: In order to establish the taxonomic and zoogeographic features of the fish fauna of the Gediz River Basin (Turkey), fish samples were colle...

In this review, the importance of taxonomic characters used as key or delimiters in fish taxonomy and the encountered problems were discussed. The taxonomical functions of morphological and molecular data forming the basis of these problems were discussed in the study using cyprinid genus Pseudophoxinus samples as an example.

In this study, the systematic position of Acanthalburnus microlepis from Kura and Aras basins is clarified and some notes on the taxonomy of the Acanthobrama species distributed in Turkey are given. Based on the morphological and osteological analyses, a high similarity between A. microlepis and Acanthobrama members is found. Some taxonomic informa...

Abstract Pseudophoxinus turani sp. n. is described from the İncesu Spring (Hassa-Hatay) drainage of Asi River, Turkey. It is distinguished from other Eastern Mediterranean Region Pseudophoxinus species by a combination of characters: lateral line incomplete, with 12–25 (commonly 16–21) perforated scales and 38–46+2-3 scales in lateral series (commo...

In order to establish the taxonomic and zoogeographic features of the fish fauna of the Büyük Menderes River basin, fish samples were collected using electrofishing equipment, gill nets, trammel nets, seine nets and cast nets from 2010 to 2011. Among the samples, 34 (19 endemic and 6 non-native species) species belonging to 13 families were identif...

Abstract In Georgia, crucian carp Carassius carassius (Linnaeus, 1758) was known from only one locality after Kesslers record (1877–1878) with no new findings until 1985. Since then C. carassius rapidly and simultaneously invaded almost all water bodies of Georgia. In 2004, it was for the first time noted that this invasive Carassius sp. could not...

In this study, morphological, phylogenetic and zoogeographical characteristics of Pseudophoxinus Bleeker, 1860 genus with a very high rate of endemism in Anatolia living mostly in cold springs, small lakes, slow-flowing rivers and dense vegetation is discussed. It is suggested that the genus (distributed in Balkans, Anatolia, Middle East, Caspian S...

Pseudophoxinus burduricus sp. n. is described from drainages of Salda and Burdur lakes, southwestern Turkey. It is distinguished from other Anatolian Pseudophoxinus by a combination of characters: lateral line incomplete, with 21–39 (commonly 26–37) perforated scales and 47–57+1-2 scales in lateral series; 10½–12½ scale rows between lateral line an...

Reproductive features of Big-Scale sand smelt, Atherina boyeri (Risso, 1810), which is an exotic fish species in Lake Egirdir (Turkey) were studied between March 2006 and August 2007 using 1433 individuals. According to 18 month GSI results, egg maturation starts in March of both 2006 and 2007 (2.74 and 1.67), and peaking in late June (9.16 and 13....

The extinction process of the endemic inland fishes of Turkey, Alburnus akili (gövce) and Pseudophoxinus handlirschi (kavinne) is studied. The assessment is based on the field studies and observations during the last two decades (1990-2010), along with a survey of the literature. The piscivorous effect of Sander lucioperca introduced into lakes Eǧi...

Being an endemic and threatened fish species in Anatolia, Aphanius splendens restricted to Salda Lake in southwest Anatolia region, Turkey. The Gölcük Lake population is regarded as extinct and current population of A.splendens tends to decrease. The presence of this introduced species should be regarded as a serious threat to populations of A. tra...

Molecular weights and band counts of sarcoplasmic proteins in four populations of Salmo trutta macrostigma living in Mediterranean region of Turkey were analyzed with sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) method and densitometric analysis. 13, 17, 14 and 15 sarcoplasmic protein bands were obtained, respectively from E...

The reproduction of Aphanius mento is described from the Ki{dotless}rkgöz Spring (Turkey) (37o06' N; 30°35' E) between January 2002 and December 2002. In this study, the sex ratio, age, the relationship between fecundity and fish length, weight and gonad weight, the gonadosomatic index, egg diameter and the first age of maturation were observed. Ag...

In this study, some reproductive features of wild brown trout (Salmo trutta macrostigma Dumeril, 1858) populations in Aksu, Eşen, Alara and Alakır streams in Turkey were examined and larval development was also investigated in two different culture conditions established on Eşen Stream (Trial 1) and at the Research Unit of Eğirdir Faculty of Fisher...

Capoeta mauricii n. sp. is described from the Lake Beyşehir drainage, in Central Anatolia, Turkey. It is distinguished from other Anatolian Capoeta by having the lips somewhat fleshy and lower lip with developed lateral lobes; a few irregular small black spots on the dorsal and lateral body, dorsal and caudal fins in individuals approximately small...

The ichthyofaunal changes in Lake Eǧirdir between 1915 and 2007 were reviewed. It was understood that the most drastic change in the ichthyofauna of Lake Eǧirdir occurred in 1955 with the introduction of pike-perch (Sander lucioperca), and that the process of change continued with the addition of Prussian carp (Carassius gibelio) in 1996 and big sc...

The population structure of Aphanius mento in Ki{dotless}rkgöz Spring (37°06′ N; 30°35′ E) was studied, using 654 fish monthly in 2002. This study were observed in the number of individuals of each sex, age, weight and size compositions. In addition, the total length-weight relationship was calculated as well as the Von Bertalanffy growth equation....

Bu çalışma, Göller Bölgesi’nde yer alan, 140 km2 yüzölçümünde, 70 m derinliğinde, Na-Mg-(Cl)-SO4-HCO3 tipinde ve alkalin özellikteki Burdur Gölü’nde yürütülmüştür. Aralık 2003-Kasım 2004 tarihleri arasında, aylık olarak, yüzeyden 30 m derinliğe (tabakalaşma döneminde 60 m) kadar göl suyunun sıcaklık, pH, çözünmüş oksijen, elektriksel iletkenlik ve...

Bu çalısmada, Egirdir Sirazbalıgı Capoeta pestai (Pietschmann, 1933)'nın, Egirdir ve Beysehir gölleri ile Çayköy Deresi, Sarıöz Çayı, Çarsamba Kanalı ve Bakaran Çayında (Derebucak) yayılıs gösterdigi belirlenmistir. Göller Bölgesi'nin endemik balıklarından olan bu türün, morfolojik özellikleri kendi populasyonları ve vücut sekli benzer olan Capoeta...

The habitat features, distribution area and population of Mountain trout (Salmo trutta macrostigma Dumeril,1858), endangered endemic subspecies living on rivers in the western Mediterranean basin were studied. Specimens were collected from main rivers of the western Mediterranean basins including Ermenek, Alara, Alakır, Aykırı, Esen Creek, and Mana...

Pseudophoxinus alii is a new species described from 3 water bodies (Aksu River, and Ilica and Kömürcüler streams) in the Antalya region, Turkey. This new species is distinguished from other large-scaled species of Pseudophoxinus in having 41-44 scales in lateral series, commonly 14 predorsal vertebrae, and large eye diameter (26%-32% HL).

The gudgeons of the genus Gobio from Anatolia are reviewed based upon the historical collection of the Hamburg Zoological Institute and Museum, Hamburg University, and recently collected materials. Fishes previously referred to subspecies of Gobio gobio belong to at least 8 species. Among them, two new species are described: G. battalgilae from nor...