An Investigation on Some Population Parameters of Tigris Trout (Salmo tigridis Turan, Kottelat & Bektaş, 2011) for Çatak Stream, Upper Tigris Basin/ Türkiye

Abstract

The present study examined length-weight relationship and some growth parameters of Tigris Trout (Salmo tigridis Turan, Kottelat & Bektaş, 2011) caught in Çatak Stream. By using electroshock and casting nets, 162 Tigris trout were caught between January 2008 and January 2009. The fork lengths and total weights were measured, and sexes of the caught fish were identified.
Furthermore, their age was also identified in line with their otoliths. The age range was found out as II–VII age. The mean of fork length was found to be 19.69 ± 3.80 cm for males and 19.89 ± 4.63 cm for females. While the mean of total weight was 97.19 ± 5.98 g for males and 102.18 ± 6.10 g for females. The length weight relationship was found as "W = 0.187 " L^"2.834" " " . Length and weight
relationship according to von Bertalanffy growth equations, they were estimated as "L" _"t" "=36.467 " ("1" -"e" ^(-"0.188" ("t+1.180" ) ) ),"Wt = 495.428 " ("1" -"e" ^(-"0.188" ("t+1.180" ) ) )^"2.834" respectively. Growth type was found to be negative allometric in males and females individuals. In line with the samples examined, it was revealed that the population was mainly composed of II and III elderly individuals. The male/female ratio was found out as 1:2 among the samples.

Keywords

• Çatak Stream
• Salmo tigridis
• Tigris trout
• growth parameters

References

1. Akkuş M, Sarı M. 2017. Problems threatening the Tigris trout (Salmo tigridis Turan, Kottelat & Bektaş, 2011) stock in Çatak Stream and some recommendations. Comm J Biol. 1(1):16-20.
2. Alp A, Kara C. 2004. Length, weight and conditıon factors of the native brown trouts (Salmo trutta macrostigma Dumeril, 1858 and Salmo platycephalus Behnke, 1968) in the Ceyhan, Seyhan and Euphrates basins. Ege J F A S. 21(1-2):9-15. [in Turkish]
3. Alp A, Kara C, Büyükcapar H.M. 2005. Age, growth and diet composition of the resident brown trout, Salmo trutta macrostigma dumeril 1858, in fırnız stream of the River Ceyhan, Turkey. Turk J Vet Anim Sci. 29(2):285-295.
4. Aras S, Karaca O, Yanar M. 1986. Bio-ecological studies on the brown trouts (Salmo trutta L.) in the stream of Madrek of River Aras. Atatürk University Journal of the Faculty of Agriculture. 17:69-77.
5. Aras S. 1976. Bio-ecological studies on the brown trouts in the Çoruh and Aras Basins. Atatürk University Journal of Agricultural Faculty. 7(1):1-16.
6. Arslan M, Ayhan Y, Bektaş S. 2004. Length-Weight relationship of brown trout, Salmo trutta l., inhabiting Kan Stream, Çoruh basin, north-eastern Turkey. Turk J Fish Aquat Sc. 4(1):45-48.
7. Avşar D. 2005. Balıkçılık biyolojisi ve populasyon dinamiği. Adana: Nobel Kitapevi 332 p. [in Turkish]
8. Çelikkale MS. 1994. İçsu Balıkları ve Yetiştiriciliği. Trabzon: K.T.Ü. Sürmene Deniz Bilimleri Fakültesi Yayınları 420 p. [in Turkish]

9. Çetinkaya O. 1996. Investigations of some biological proporties of brown trout (Salmo trutta macrostigma Dum., 1858) living in the Çatak Stream (Tigris River, Turkey). Istanbul Univ J Aquat Prod. 9(13):111-122. [in Turkish]
10. Duman M, Dartay M, Yüksel F. 2011. Meat yield and chemical composition of the Brown trout, Salmo trutta macrostigma (Dumeril, 1858) living in Munzur river. Fırat Üniversitesi Fen Bilimleri Dergisi. 23(1):41-45. [in Turkish]
11. Erkoyuncu İ. 1995. Balıkçılık biyolojisi ve populasyon dinamiği. Sinop: Ondokuz Mayıs Üniversitesi Yayınları 265 p. [in Turkish]
12. Froese R. 2006. Cube law, condition factor and weight–length relationships: history, meta-analysis and recommendations. J Appl Ichthyol. 22(4):241-253. doi: 10.1111/j.1439-0426.2006.00805.x
13. Geldiay R, Balık S. 1996. Turkey fresh water fish. 2st Ed. Bornova: Faculty of fisheries press 35 p. [in Turkish]
14. Gelwick F.P. 1990. Longitudinal and temporal comparisons of riffle and pool fish assemblages in a northeastern Oklahoma Ozark Stream. Copeia. 4:1072-1082. doi: 10.2307/1446491
15. Gülle İ, Küçük F, Güçlü SS, Gümüş E, Demir O. 2007. Distrubution area and population of mountain trout (Salmo trutta macrostigma Dumeril, 1858) in the western Mediterranean basin of Turkey. Turk J Fish Aquat Sc. 5(8):189-198.
16. Kara C, Alp A, Can MF. 2011. Growth and reproductive properties of flathead trout (Salmo platycephalus Bhenke, 1968) population from Zamantı Stream, Seyhan River, Turkey. Turk J Fish Aquat Sc. 11: 367–375. doi: 10.4194/1303-2712-v11_3_05
17. Kocabas M, Başçınar N, Kutluyer F, Önder A. 2013. Ülkemizde yayılım gösteren Salmo trutta macrostigma ekotipi gerçekten yok oluyor mu? Türk Bilimsel Derlemeler Dergisi. 6(1):132-138.
18. Kocabas M, Kayim M, Can E, Kizak V, Kutluyer F, Serdar O, Demirtaş N. 2012. Seasonal variation in food preference of the brown trout Salmo trutta macrostigma (T., 1954) from Uzungöl Stream, Turkey. Afr J Agr Res. 7(13):1982-1987. doi: 10.5897/AJAR11.403
19. Kocaman EM, Yüksel AY, Atamanalp M. 2004. Some growth characteristics of the brown trout Salmo trutta macrostigma (Dumeril, 1858) in Teke stream (Erzurum). Turk J Vet Anim Sci. 28(6):981-989. doi: 10.3906/vet-0111-42
20. Korkmaz A. 2005. Density and biomass of fish in Kadıncık (Camlıyayla-Mersin) Brook. Journal of Agricultural Sciences. 11(1):91-97. doi: 10.1501/Tarimbil_0000000493
21. Maitland PS, Campbell RN. 1992. Freshwater fishes of the British Isles. 1st. Ed. London: Harper Collins Publishers 368 p.
22. Nikolsky GW. 1963. The ecology of fishes. London: Academic Press 352 p.
23. Pauly D, Munro JL. 1984. Once more on the comparison of growth in fish and invertebrates. Fishbyte. 2(1): 1-21.
24. Tanır Öz, Fakıoğlu Ö. 2017. Density, Biomass and length-weight relationship of brown trout (Salmo trutta linnaeus, 1758) population in the Coruh river basin, north-eastern anatolia, Turkey. LimnoFish. 3(1): 129-136. doi: 10.17216/LimnoFish.313520
25. Tortonese E. 1954. The trouts of Asiatic Turkey. Publications Institute Hydrobiology University of Istanbul. 2:1-26.
26. Turan D, Kottelat M, Bektas Y. 2011. Salmo tigridis, a new species of trout from the Tigris River, Turkey (Teleostei: Salmonidae). Zootaxa. 2993(1):23-33. doi: 10.11646/zootaxa.2993.1.2
27. Von Bertalanffy, L., 1957. Quantitative laws in metabolism and growth. The Quarterly Review of Biology. 32(3):217-231. doi: 10.1086/401873
28. Wootton R.J. 1991. Fish ecology. Scotland: Springer Science and Business Media 187 p.
29. Yüksel AY. 1997. Tekederesi suyunun bazı fiziko-kimyasal parametreleri ve burada yasayan dağ alabalıkları (Salmo trutta macrostigma, Dumeril 1815)'in bazı özellikleri üzerine bir araştırma [Master's Thesis]. Atatürk Üniversitesi. 55 p. [in Turkish]
30. Yüksel F, Karlıkaya E, Çoban MZ. 2020b. The investigation of meristic and morphometric characteristic of Salmo macrostigma (Dumeril, 1858) in Munzur river. Int J Pure Appl Sci. 6(2):77-86 [in Turkish]. doi: 10.29132/ijpas.779189
31. Yüksel F, Makal Dedecan F, Çoban MZ. 2020a. The estimation of some growth parameters of Salmo macrostigma (Dumeril, 1858) in Munzur river. Int J Pure Appl Sci. 6(2):87-98 [in Turkish]. doi: 10.29132/ijpas.777862