Mahmut Elp

Kastamonu University · Fisheries Faculty

The study aimed to investigate the possible use of myo-inositol as a carbon source in Chlorella sp. culture. Firstly, experiments were conducted with different myo-inositol concentrations and glycerol in flasks. Secondly, a laboratory-scale tubular photobioreactor (PBR) was operated with CO2 and myo-inositol to determine performance under industria...

The aim of this study is to reveal the development process of aquaculture in Kastamonu province from past to present. In this context, data from the provincial directorate of agriculture and forestry were used and observations were made through field studies carried out throughout the province. Observations throughout the province were carried ou...

In a feeding experiment for 75 days, the effects of fumitory (Fumaria officinalis) extract on growth, haematology, immune response and antioxidant enzyme activities in rainbow trout (Oncorhynchus mykiss) were evaluated. The aqueous methanolic extract of the plant was mixed with feeds at three different levels, 0.1% (FO1), 0.2% (FO2) and 0.3% (FO3),...

This paper studies the radionuclide (137Cs, 226Ra, 232Th, 40K) activity concentrations and gross radioactivities in waters and sediments of Lake Van, which is the third largest closed lake (with no natural or artificial outlet) within the Earth. The physico-chemical parameters were measured and evaluated in the lake waters. The mean gross α activit...

Understanding the relative contributions of different spawning habitats to adult fish populations is central to effective fisheries management and species conservation. The Tarek (Alburnus tarichi) is an adfluvial cyprinid that is endemic to the alkaline-saline waters of Lake Van, Turkey. Tarek are culturally and economically important to the regio...

Microalgae are used in aquaculture and various industrial fields such as pharmaceuticals, feed, food, agriculture, and energy. Microalgae is a potential natural food coloring agent as pigments and contain bioactive components such as polyunsaturated fatty acids (PUFA) in their composition. Porphyridium cruentum is a red alga with the ability to acc...

We examined antioxidant enzyme activities, immune response, blood parameters and growth performance of rainbow trout fed with different doses of cherry stem (CS) aqueous methanolic extract. Four different feeds containing CS extract in different doses, 0% (control), 0.1 (0.1% CS), 0.5 (0.5% CS) and 1% (1% CS), as treatment feeds were prepared. Fish...

This study aimed to determine the distribution area of tarek (Alburnus tarichi (Güldenstädt, 1814)) and to define how it must be called according to the scientific name by evaluating its previous studies made by various systematisers and their reports on its distribution, and by comparing literature knowledge. The taxonomic characteristics of the c...

Pseudophoxinus firati was described from one spring in the upper Euphrates River drainage in Turkey. Here we record this species from seven additional sites, three in the upper Euphrates drainage, one in the upper Seyhan and three in the upper Ceyhan River drainages. These findings largely expand the distribution area of the species and its habitat...

z: Doğu sivrisinek balığı (Gambusia holbrooki Girard, 1859) istilacı bir balık türü olup, birçok su kaynağında sivrisinek ile biyolojik mücadele için kullanım nedeniyle dünyada geniş bir yayılım göstermektedir. Doğal yayılış gösteren balıklar ile girdiği rekabet nedeniyle olumsuz etkilere sahiptir. Van Sazlıklarına sivrisinek ile biyolojik mücadele...

zet: Kapalı bir havza özelliğinde olan Van Gölü Havzası'nda birçok su kaynağı bulunmaktadır. Bu su kaynaklarındaki farklılık kendisini Alburnus tarichi, Alburnus timarensis, Barbus ercisianus, Capoeta kosswigi ve Oxynoemacheilus ercisianus gibi endemik balık türlerinde göstermiştir. Bu balık türlerinin ekolojik özelliklerinin bilinmesi, türün havza...

z: Bu çalışmanın amacı Kastamonu ili sınırları içerisinde bulunan Germeçtepe Baraj Gölü'nde yayılış gösteren balık biyoçeşitliliğinin belirlenmesidir. Sulama amaçlı inşa edilen ve 1986 yılında hizmete açılan Germeçtepe Baraj Gölü Kastamonu ili sınırları içerisinde yer almakta olup Daday Çayını besleyen Şadibey Deresi üzerinde kurulmuştur. Daday Çay...

In this study, physical, chemical and microbio-logical parameters were analyzed in water samples in order to determine the effects of sand pits and sand extraction in Karasu Stream. The water quality data were collected monthly between June 2014 and May 2016 from five sampling stations distributed along the stream and 39 parameters were examined su...

In this study, the swimming performance of Tarek (Alburnus tarichi), which is the unique fish species that can survive naturally in Lake Van and performs compulsory reproduction migration to freshwater, has been investigated taking into consideration the effects of various factors. The swimming performances of Tarek individuals were investigated in...

Four species of Capoeta (C. baliki, C. banarescui, C. sieboldii and C. ekmekciae) have been reported from Black Sea drainages, to date. We recognised an additional species in the Ezine Stream in the Southern Black Sea basin. Based on the analysis of 21 metric and 8 meristic data, we concluded that the Ezine Stream population forms a distinct, unnam...

Ülkemizin doğusunda yaklaşık 1648.33 m kotunda yer alan Van Gölü ortalama 3580.9 km2 serbest su yüzey alanına sahip olup gölün ortalama derinliği 162.4 m’dir (mak: 452.9 m). Kapalı havzaya sahip olan Van Gölü çevresindeki yerleşim birimlerinden kaynaklanan atıkların kısmi artma sonrası ve/veya arıtılmadan göle deşarjı, gölde su kirliliği açısından...

IIn the present study, a comparison of the otolith morphology of Alburnus tarichi, collected from different localities throughout Van Basin was carried on. A total of 351 specimens of A.tarichi collected by trammel nets from four different localities (Van, Erçek, Nazik, Aygır) during the period April-May 2015 were examined. Fork length and body wei...

zet: Bu çalışmada Van ili Erciş İlçesi ve çevresindeki çeşitli yerleşim yerlerinde içme suyu olarak kullanıldığını belirlediğimiz suların fiziksel, kimyasal ve mikrobiyolojik özellikleri incelenmiştir. Örneklerde fiziksel olarak sıcaklık, Abstract: In this study, microbiological, physical, and chemical characters of drinking water supplied from cit...

This study was carried out to determine the fish species of Van Lake Basin between in 2008- 2012. Van Lake Basin is a closed basin that shaped approximately 2.3 % of Turkey. Because of closed basin character, the differences indicated in species diversity. Basin is rich in endemic species diversity with plant and animal species. This richness were...

This study was carried out to determine the fish species of Van Lake Basin between in 2008-2012. Van Lake Basin is a closed basin that shaped approximately 2.3 % of Turkey. Because of closed basin character, the differences indicated in species diversity. Basin is rich in endemic species diversity with plant and animal species. This richness were r...

Tarek is an endemic species peculiar to Lake Van basin. Twenty five percent of our total inland water fisheries is derived from this fish. Besides its economical and ecological importance; it also brings touristic value to Van and neighborhood districts with its reproduction migration which occurs every year intensively during May and June. In this...

Bu çalışma Van Gölü havzası su kaynaklarda yaşayan balık populasyonlarının karşılaştıkları problemler ve bu problemlerin çözüm yollarının ortaya konulması amacıyla yapılmıştır. Yapılan incelemelerde dere yatakları üzerine kurulan kum ocakları ve kum yıkama yerlerinin akarsuların taban yapısını tahrip ettiği, suyu bulandırdığı gözlenmiştir. Faaliyet...

Alburnus selcuklui, a new species from a branch of Botan stream of the River Tigris in East Anatolia Turkey, is distinguished from other Anatolian Alburnus species by the anal-fin origin 0-4 scales behind the base of the dorsal fin-base, 70-80 + 3-4 lateral line scales, 10-15 gill rakers, 8½-9 branched dorsal-fin rays, 11-12½ branched anal-fin rays...

In this study, population structure, growth and reproduction properties of Liza abu which lives in Devegecidi Dam Lake and its inlets were observed between November 2008 and January 2010 and totally 1005 individuals sampled. Maximum age, fork length and weight were determined as IV, 21.8 cm, 122 g, respectively. Sex ratio (male:female) was calculat...

This study was carried out in Cigli stream between March 2007 and July 2009 on 553 Capoeta capoeta. Maximum age, fork length and total weight of samples was found as VII, 33.2 cm and 432.3 g, respectively. Length-weight relationship was calculated as W = 0.01702xL2.887. Average condition factor were calculated as 1.280±0.006 in overall samples. The...

The Lake Van basin located in eastern Anatolia is inhabited by two species of Alburnus: Alburnus tarichi is a migratory species foraging in the lake and spawning in all tributaries, while A. timarensis is resident in streams and is known only from one tributary of the lake, the Karasu. It could be shown that A. timarensis is a valid species, which...

Growth parameters and the reproduction period of white bream (Blicca bjoerkna L. 1758) sampled from Sapanca Lake were determined monthly between November 2000 and October 2001. Th ree hundred and fift y white bream specimens caught ranged in age from 1+ to 9+ years, and the majority of the samples consisted of individuals of the 5+-year-old age gro...

The growth parameters and reproduction period in vimba (Vimba vimba L. 1758) sampled from Sapanca Lake were determined monthly between September 2003 and July 2004. The 335 vimba specimens caught ranged in age from 2+ to 6+ years, and the majority of the samples consisted of individuals of the 4+-year-old age group. The length-weight relationship w...

This study was carried out between March 2007 and April 2008 in Karasu Stream. Total 472 individual sampled by hand nets and electroshock. Length, weight, sex and gonad weight were determined. Age was determined by scales. The age, length and weights of samples varied from I-VI, 4.0-37.5 cm and 0.7-676.2 g, respectively. It was determined that the...

Chalcalburnus tarichi is an endemic cyprinid species living in the Lake Van basin, in eastern Anatolia, Turkey. The present study was undertaken to determine which hormones induce oocyte maturation in C. tarichi. The levels of 17alpha,20beta,21-trihydroxyprogesterone (20beta-S), progesterone (P), 17alpha-hydroxyprogesterone (17alpha-HOP), 11-deoxyc...

This study was carried out in Zernek Dam Lake, Van, Turkey. In this study, 586 individuals have sampled and investigated between June 2006 and October 2007. The ages, lengths and weights of individuals varied from 1-7 years, 4.0-41.0 cm and 0.7-1060.4 g, respectively. Age-length and length-weight relationships were calculated as Lt = 48.927x(1–e-0....

This study was carried out to determine some biological parameters of carp populations introduced to the Kockopru Dam Lake on the Zilan River in Lake Van Basin and conducted between December 1999 and August 2001. Sampling was carried out monthly using hand nets and trammel nets. It was determined that carp become a sustainable population and is cau...

This study was carried out with the purpose of studying the reproduction biology of barbel living in the Koçkopru dam lake and its inlets. The male:female ratio was calculated as 1:061, and males were found to be dominant. It was determined that males reached to the sexual maturity after their first year, females reached to sexual maturity after th...

This study was carried out to determine some growth parameters of barbel populations living in the KoCkoprU Dam Lake and its inlets between April 2000 and October 2001. The barbel species are shown a widespread distribution in Turkey. The species is native in study area, has economic value and is fished local fishermen. A total of 324 individuals w...

The structure of postovulatory follicles and the levels of ovarian 11-dehydrocorticosterone (11-DHC), estradiol-17β (E 2), 17α-hydroxyprogesterone (17α-OH-P), and progesterone (P), before and after spawning, were studied in Chalcalburnus tarichi. It was observed that postovulatory follicles are characterized by a highly vascular thecal layer and hy...

The ultrastructure of the ovarian follicle and the levels of the ovarian 11-dehydrocorticosterone (11-DHC), estradiol-17β (E2), 17α-hydroxyprogesterone (17α-OHP), and progesterone (P) were studied during cortical alveoli, vitellogenesis and oocyte maturation in Chalcalburnus tarichi. The microvilli began to form on the oocyte surface during cortica...

The histological development of the digestive system and swim bladder of Chalcalburnus tarichi larvae and their histology in adults were studied under light microscopy. After hatching, the digestive tract is a simple undifferentiated tube. Exogenous feeding started on the 6th day. The yolk sac was absorbed completely on the 9th day. The goblet cell...

In this study embryonic and larval development of Chalcalburnus tarichi was investigated. The mature adults were collected from the Karasu river, stripped and fertilised artificially. The mature eggs of C. tarichi are nonbouyant, spherical, sticky and 1.5-1.6 mm in diameter. Fertilised eggs incubated in 18 and 22°C, samples were taken for investiga...

In this study, gonad development of Chalcalburnus tarichi, an anadromus, endemic fish species of the Lake Van and its inlets was histologically investigated. During oogenesis, six different development phases were histologically identified: chromatin-nucleolus, perinuclear, cortical alveolar, vitellogenic, ripening and ovulation phases. The diamete...