Erzincan Üniversitesi Erzincan University Fen Bilimleri Enstitüsü Dergisi Journal of Science and Technology 2020, 13(2), 609-619 2020, 13(2), 609-619 ISSN: 1307-9085, e-ISSN: 2149-4584 DOI: 10.18185/erzifbed.698577 Araştırma Makalesi Research Article Length-Weight Relationships and Fulton’s Condition Factor of Common carp (Cyprinus carpio L., 1758) from Tercan Dam Lake, Eastern Anatolia, Turkey Özge ZENCİR TANIR1* 1 Kemah Vocational School, Erzincan Binali Yıldırım University, Erzincan-TURKEY Geliş / Received: 04/03/2020, Kabul / Accepted: 10/07/2020 Abstract In this study, length-weight relationships (LWR) and Fulton’s condition factor (K) values of totally 190 Common carp, Cyprinus carpio L., 1758 specimens, captured from Tercan Dam Lake between May 2017- October 2017, were examined. Sex composition was 41.58 % (n=79) female and 58.42 % (n=111) male. Female to male sex ratio of the population was found as 1:0.71. Fork length and weight values of overall, female and male specimens ranged from 11.2-55.5 cm/30.2-2860.5 g, 11.2-55.5 cm/30.2-2860.5 g and 12.7-47.5 cm/44.6- 1846.9 g, respectively. K values varied between 1.204 and 4.008. The average value of its was calculated as 2.155±0.041 for females, 2.138±0.046 for males and 2.148±0.030 for overall. The LWR were determined W= 0.0646*FL2.6613 for females, W=0.0389*FL2.8103 for males and W=0.0528*FL2.7202 for overall. The values of b was estimated as 2.66 (females); 2.81 (males); 2.72 in overall. According to b value of LWR, the growth of C.carpio was negatif allometric (b<3, P<0.005). No information currently exists on the LWR of C.carpio in the Tercan Dam Lake, Eastern Anatolia, Turkey. Therefore, this paper is an important contribution to the fisheries management applications. Keywords: Common carp, Cyprinus carpio, growth parameters, Tercan Dam Lake Tercan Baraj Gölü 'nde Yaşayan Sazan (Cyprinus carpio L., 1758) Balığının Boy-Ağırlık İlişkisi ve Kondisyon Faktörü Öz Bu çalışmada, Tercan Baraj Gölü’nden Mayıs 2017-Ekim 20017 tarihleri arasında yakalanan 190 adet sazan balığının (Cyprinus carpio L., 1758) boy-ağırlık ilişkileri ve Fulton’s kondisyon faktörü değerleri incelenmiştir. Örneklemin % 41.58 (n=79)’sını dişiler, % 58.42 (n=111)’ünü erkekler oluşturmuştur. Populasyonun dişi/erkek oranı 1:0.71 olarak bulunmuştur. Örneklerin çatal boy ve ağırlıkları sırasıyla 11.2-55.5 cm/30.2-2860.5 g, 11.2- 55.5 cm/30.2-2860.5 g and 12.7-47.5 cm/44.6-1846.9 g, olarak bulunmuştur. Kondisyon faktörü değerleri 1.204-4.008. arasında değişmiştir. Ortalama kondisyon faktörü dişiler için 2.155±0.041, erkekler için 2.138±0.046 ve tüm bireyler için ise 2.148±0.030 olarak hesaplanmıştır. Boy-ağırlık ilişkileri dişilerde W= 0.0646*FL2.6613, erkeklerde W=0.0389*FL2.8103 ve tüm bireylerde W=0.0528*FL2.7202 olarak tespit edilmiştir. ''b'' değerleri dişilerde 2.66, erkeklerde 2.81 ve tüm bireylerde 2.72 olarak hesaplanmıştır. C.carpio'nun büyümesi negatiftir (b<3, P<0.005). Tercan Baraj Gölü'nde C.carpio' nun boy-ağırlık ilişkisi ve kondisyon faktörü hakkında bilgi bulunmamaktadır. Bu nedenle, bu çalışma, balıkçılık yönetimi uygulamalarına önemli bir katkı sağlayacaktır. Anahtar Kelimeler: Sazan balığı, Cyprinus carpio, büyüme parametreleri, Tercan Baraj Gölü *Corresponding Author: [email protected] 609 Length-Weight Relationships and Fulton’s Condition Factor of Common carp (Cyprinus carpio L., 1758) from Tercan Dam Lake, Eastern Anatolia, Turkey 1. Introduction habitats and their life cycles (Petrakis and Stergiou, 1995; Froese et al., 2011). Condition The common carp (Cyprinus carpio) belongs factor are also important biological parameter to the Class Osteichthyes (the bony fishes), as it gives us clear knowledge regarding the the order Cypriniformes and the family maturation and spawning of fish at different Cyprinidae, which is considered the largest body lengths during their life span also family of freshwater fish in the world estimating the condition at different months (Anonim, 2020). In Turkey, it has widespread and provides information on the physiological distribution in freshwater ecosystems such as state of the fish in relation to its welfare and natural lakes, pond, dams lakes and rivers based on the hypothesis that heavier fish of a stagnant flowing parts of a large, also rarely given length are in better condition (Bagenal inhabits brackish-water environments and Tesch, 1978). (Demirkalp, 2007; Saylar and Benzer, 2014). The first study on the carp population was C.carpio, which is considered to be a very started by Numann (1958), and many studies important aquaculture species, has been have been made on the length-weight successfully introduced into most freshwaters relationship and condition factor regarding because of high growth speed of length and C.carpio in dam lakes of different geographic weight, high meat yield, nonselective habitat regions of Turkey ( Table 1). However, there use, easy production availability in fish farms is no information available regarding the and tasty meat (Demirkalp, 1992). biological parameter of the common carp population in Tercan Dam Lake. The In fishery science, fish length can often be objective of this study was to investigate and measured more rapidly and easily than weight report the first data on length-weight (Kara and Bayhan, 2008). The general length- relationship and condition factor of C. carpio weight relationships (LWR) provide a which is preferred by local people because of mathematical relationship between the two having high economical value. Also, the data variables, length and weight, so that the presented are compared with results from unknown variable can be easily calculated similar studies. from the known variable (Dar et al., 2012; Sarkar et al., 2012). Condition factor (K) is an 2. Material and Methods expression of relative fatness of fish and generally larger values of K, indicates better 2.1. Description of the study site and data condition of the fish. This factor is calculated collection from the relationship between the weight of a fish and its length, with the intention of Tercan Dam Lake is a dam built in Erzincan describing the "condition" of that individual province on Tuzla stream for the purpose of fish (Froese, 2006). irrigation and electrical energy production between 1969-1988. It has a surface area of Length-weight relationships (LWR) are 8.85 km2, a drainage volume of 178 million important and have many applications in fish m3, and an irrigation area of 29725 ha. The stock assessments, biomass estimations, geographical location of the study area is as ecological studies and modeling aquatic shown in Figure 2. It is located on latitude ecosystems (Froese, 2006). In addition, the 39°44'04.30"N, 39°26'26.82"E; 1448 m LWR in important in terms of providing for altitude. the estimation of weight from the length and the calculation of condition indices as well as A total of 190 specimens of C. carpio L., 1758 providing general information about the were colleted from Tercan Dam Lake in May morphology of populations in different 2017-October 2017 using gillnets of various mesh sizes (20, 30, 40 and 55 mm). Fish collected were anesthetized using MS 222, 610 Length-Weight Relationships and Fulton’s Condition Factor of Common carp (Cyprinus carpio L., 1758) from Tercan Dam Lake, Eastern Anatolia, Turkey preserved in 4% formaldehyde solution and combined sex were tested using the student's then transported to the the laboratory for t-test (Zar, 1999). All statistical analyses were further analysis. The collected specimens of done using MS-Excel and SPSS (version C.carpio (Figure 1) were measured for fork 17.0). length (FL, in cm) to the nearest millimeter and total weight (W, in g) using a digital balance with an accuracy of 0.1 g. Sex was firstly recognised by a macroscope observation of the gonads. 2.2. Determination of length-weight relationship and Fulton’s condition factor Figure 1. A specimen of Cyrinus carpio The length-weight relationship (LWR) were collected from Tercan Dam Lake (Photo: determined for males, females and combined Ö.Zencir Tanır) sexes according to equation, 푊 = 푎퐹퐿푏, where W was the body weight (g), FL was the fork length (cm), a was the intercept of the regression and b was the regression coefficient (slope) (Bagenal and Tesch, 1978; Ricker, 1975). These parameters were estimated by the least squares regressions method and, then, subjected to logarithmic expression 퐿표푔푊 = 푙표푔푎 + 푏푙표푔퐹퐿. Standard error was calculated for the slope (b). The hypothesis of isometric growth was tested through the student’s t-test, with values of p<0.005 considered significant. Student’s t-test was used for comparison b value obtained in the linear regression with isometric value (Sokal and Rohlf, 1987): 푡푠 = (푏−3) , where ts is the t-test value, b the slope 푆푏 and Sb the standard error of the slope (b). The Figure 2. Map of the studying area comparison obtained values of t-test with the respective tabled critical values allowed for 3. Research Findings the determination of the b values statistically significant, and their inclusion in the isometric Investigation of 190 specimens revealed that range (b=3) or allometric range (negative C.carpio population inhabiting the waters of allometric b<3, positive allometric b>3). The Tercan Dam Lake was composed of 41.58 % degree of correlation between the variables (n=79) female and 58.42% (n=111) male. The was computed to determine coefficient, r 2. sex ratio (female:male) was 1:0.71 in favour of males and this ratio was deviated The Fulton’s condition factor was computed significantly from 1:1 (p<0.05).