Morphometric Characteristics of Freshwater Crayfish (Pontastacus leptodactylus Eschscholtz, 1823) Caught in Sapanca Lake, Türkiye

Öz

This is the first study providing information on some morphometric parameters for Pontastacus leptodactylus from Sapanca Lake (Sakarya), Türkiye. This study was conducted from June - 2016 to October - 2017 and a total of 264 crayfish were caught, being 146 females and 118 males. The results revealed that the average total length for the population was 91.89±15.68 mm (TL±SD) (94.75±15.91 mm for females, 88.36±14.72 mm for males), and the average total weight for the total population was 27.27±16.84 g (TW±SD) (29.02±17.54 g for females, 25.09±15.74g for males). The sex ratio was computed as 1.24:1 (female to male). A strong positive statistical relationship was determined between the total length and total weight of females, males, and both sexes (r2: 0.90 – 0.95). This statistically strong relationship was also valid between other body parts, such as carapace length, width, and weight. The regression analyses for total length-total weight relationships also revealed that the whole population exhibited positive allometric growth (b=3.186) regardless of sex, and the condition factor for all sex groups was computed to be over 3 (K=3.23±0.60 SE).

Anahtar Kelimeler

• Pontastacus leptodactylus
• morphometric characteristics
• Sapanca Lake.

Sapanca Gölü’nde (Türkiye) Yakalanan Tatlısu Kerevitlerinin (Pontastacus leptodactylus Eschscholtz, 1823) Morfometrik Özellikleri

Öz

Bu çalışma, Sapanca Gölü (Sakarya, Türkiye) tatlısu kerevitlerinin (Pontastacus leptodactylus) bazı morfometrik parametreleri hakkında bilgi sağlayan ilk çalışmadır. Çalışma Haziran 2016-Ekim 2017 tarihleri arasında gerçekleştirilmiş, 146 dişi ve 118 erkek olmak üzere toplam 264 kerevit yakalanmıştır. Sonuçlar, popülasyonun ortalama toplam uzunluğunun (TL±SD) 91,89±15,68 mm (dişiler için 94,75±15,91 mm, erkekler için 88,36±14,72 mm) ve ortalama ağırlığının (TW±SD) 27,27±16,84 g (dişiler için 29,02±17,54 g ve erkekler için 25,09±15,74 g) olduğunu ortaya koymuştur. Cinsiyet oranı 1.24:1 (dişi:erkek) olarak bulunmuştur. Dişi, erkek kerevitler ve her iki cinsiyetin total boy ve total ağırlığı arasında istatistiksel olarak güçlü bir pozitif ilişki belirlenmiştir (r2: 0.90 – 0.95, P<0.05). Bu istatistiksel güçlü ilişkinin, diğer morfometrik parametreler, özellikle kabuk uzunluğu, genişliği ve ağırlığı arasında da geçerli olduğu tespit edilmiştir. Toplam boy-toplam ağırlık ilişkileri için yapılan regresyon analizleri de cinsiyetten bağımsız olarak tüm popülasyonun pozitif allometrik büyüme gösterdiğini (b=3.186) ve tüm cinsiyet grupları için kondisyon faktörünün 3'ün üzerinde (K=3.23±0.60 SE) olduğunu ortaya koymuştur

Anahtar Kelimeler

• : Pontastacus leptodactylus
• morfometrik özellikler
• Sapanca Gölü

Kaynakça

1. Aksu Ö, Kurt Kaya G. 2017. The relationships between length-weight, and meat yield of freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) of Aktaş Lake. Journal of Balıkesir University Institute of Science and Technology 19 (2), 283-295 (in Turkish with an abstract in English). doi:10.25092/baunfbed.346123
2. Aydın H, Harlıoğlu MM, Deniz T. 2015. An Investigation on the Population Parameters of Freshwater Crayfish (Astacus leptodactylus Esch., 1823) in Lake İznik (Bursa). Turk J Zool. 39, 660-668. doi:10.3906/zoo-1406-6
3. Avşar D. 1998. Balıkçılık Biyolojisi ve Populasyon Dinamiği. Adana, Baki Kitabevi, p.301,
4. Balık S, Özkök E, Özkök R. 2002. Catch per Unit Effort and Size Composition of Crayfish, Astacus leptodactylus Eschscholtz 1823, in Lake İznik. Asian-Australas J Anim Sci. 15(6): 884-889 doi: 10.5713/ajas.2002.884
5. Balık S, Ustaoğlu MR, Sarı HM, Berber S. 2005. Determination of traits some growth and morphometric of crayfish (Astacus leptodactylus Eschscholtz, 1823) at Demirköprü Dam Lake (Manisa). EgeJFAS. 22: 83–89 (in Turkish with an abstract in English).
6. Baran İ, Soylu E. 1989. Crayfish plague in Türkiye (short communication). J Fish Dis. 12: 193–197. doi:10.1111/j.1365-2761.1989.tb00292.x
7. Berber S, Balık S. 2006. Determination of traits some growth and morphometric of crayfish (Astacus leptodactylus Eschscholtz, 1823) at Manyas Lake (Balıkesir). EgeJFAS. 23(1-2), 83-91 (in Turkish with an abstract in English).
8. Berber S, Balık S. 2009. The lenght-weight relationships, and meat yield of crayfish (Astacus leptodactylus Eschcholtz, 1823) population in Apolyont Lake (Bursa, Türkiye), J Fish Scien com. 3(2), 86-99 (in Turkish with an abstract in English). doi: 10.3153/jfscom.2009012

9. Berber S, Mazlum Y. 2009. Reproductive Efficiency of The Narrow-Clawed Crayfish, Astacus Leptodactylus, in Several Populations In Türkiye. Crustaceana 82 (5): 531-542. doi:10.1163/156854009X407713
10. Bolat Y. 2001. An estimation in the population density of freshwater crayfish (Astacus leptodactylus salinus Nordman 1842) living in Hoyran Area of Egirdir Lake, Isparta, Türkiye. PhD dissertation (In Turkish with English summary), The University of Süleyman Demirel, Türkiye, 116 pp
11. Bolat Y, Mazlum Y, Günlü A, Bilgin Ş, İzci L. 2011. Effectiveness of Bait and Unbait in Trapping of Astacid Crayfish. Turk J Fish Aquat Sci. 11: 227-232 doi:10.4194/trjfas.2011.0207
12. Bolat Y, Kaya MA. 2016. Determination of growth and reproduction properties of freshwater crayfish (Astacus leptodactylus, Eschscholtz, 1823) in Eğirdir Lake-Türkiye. Süleyman Demirel University J Eğirdir Fish Fac. 12(1), 11-24 (in Turkish with an abstract in English). Büyükçapar HM, Alp A, Kaya M, Çiçek Y. 2006. The length-weight relationships, and meat yield of crayfish (Astacus leptodactylus Eschscholtz, 1823) in the Mamasın Reservoir (Aksaray, Türkiye. EgeJFAS. 23(1-2), 21-25 (in Turkish with an abstract in English).
13. Crandall KA, Buhay JE. 2008. Global diversity of crayfish (Astacidae, Cambaridae, and Parastacidae––Decapoda) in freshwater, Hydrobiologia, 595:295–301, doi:10.1007/s10750-007-9120-3
14. Deniz TB, Harlıoğlu MM, Deval MC. 2010. A Study on the Morphometric Characteristics of Astacus leptodactylus Inhabiting the Thrace Region of Türkiye, J Knowl Manag Aquat Ecosyst. 397, 1-13. doi:10.1051/kmae/2010021
15. Demirol F, Yüksel Y. 2014. Keban Baraj Gölü’ndeki kerevit (Astacus leptodactylus Eschscholtz, 1823) populasyonuna uygulanan avcılık tekniğinin belirlenmesi. Yunus Araş Bült, 1,13-22 (in Turkish with an abstract in English).
16. Erdemli AÜ. 1982. A research on the freshwater crayfish (Astacus leptodactylus, Esch., 1823) population of Beyşehir, Eğridir, Akşehir, Eber Lakes and Apa Dam Lake. Tübitak D B Der: Vet Hay. 7, 313–318.
17. FAO 2022. Global Capture Production. Fisheries and Aquaculture Division [online]. Rome. [cited 2022 Jan 04]. Available from: https://www.fao.org/fishery/en/collection/capture?lang=en
18. Froese R. 2006. Cube law, condition factor and weight–length relationships: history, meta‐analysis and recommendations. Journal of applied ichthyology, 22(4), 241-253."
19. Furst M. 1988. Future perspectives for Turkish crayfish fishery (Türkiye'de kerevit avcılığının geleceği). J Aquat Prod. 2(2): 139-147.
20. GFCM 2018. GFCM Data Collection Reference Framework (DCRF). Version: 22.1
21. Güner U. 2006. Some morfometric characteristics of crayfish (Astacus leptodactylus Eschscholtz, 1823) in Lake Terkos, Ege JFAS. 23 (1-2), 163-167 (in Turkish with an abstract in English).
22. Güner U. 2008. Some Morphometric Properties and Growth Parameter of Crayfish (Astacus leptodactylus Eschscholtz, 1823) at Kavakli Lake (Edirne-Meriç, BİBAD. 1(1), 37-42 (in Turkish with an abstract in English).
23. Harlıoğlu MM. 1999. The relationships between length–weight, and meat yield of freshwater crayfish, Astacus leptodactylus Eschscholtz, in the Ağın region of Keban Dam Lake. Turk J Zool. 23: 949–957 (in Turkish).
24. Harlıoğlu MM, Güner U. 2006. Studies on the recently discovered crayfish, Austropotamobius torrentium (Shrank, 1803), in Türkiye: morphological analysis and meat yield. Aquacult Res. 37:538–542. doi:10.1111/j.1365-2109.2006.01451.x
25. Karabatak M, Tüzün İ. 1989. Mogan Gölü’ndeki Kerevit (Astacus leptodactylus Eschscholtz, 1823) Populasyonunun Bazı Özellikleri. A Ü Su Ür Müh Derg. 2, 1-34 (in Turkish with an abstract in English).
26. Kuşat M, Bolat Y. 1995. Eğirdir Gölü (Türkiye) Tatlısu Istakozu (Astacus leptodactylus salinus Eschscholtz, 1823)’nun Boy Ağırlık Dağılımı ve Kerevit Vebası Hastalıkının İncelenmesi. Ege JFAS . 12, 1-2, 69-74 (in Turkish with an abstract in English).
27. Köksal G. 1980. Biometric analysis on the freswater crayfish (Astacus leptodactylus, Eschscholtz, 1823). Which is produced in Türkiye – Relationship between the major body component and meat yield. Vet J Ank Univ. 26, 93–114.
28. Pauly D. 1984. Length-converted catch curves: a powerful tool for fisheries research in the tropics (part II). Fishbyte 2: 17–19.
29. Rahe R, Soylu E. 1989. Identification of the pathogenic fungus causing destruction to Turkish crayfish stocks (Astacus leptodactylus). J Invertebr Pathol. 54: 10–15.
30. Reynolds JD. 2011. A review of ecological interactions between crayfish and fish, indigenous and introduced. Knowl Manag Aquat Ecosyst. 401, 10. doi:10.1051/kmae/2011024
31. Rhodes CP, Holdich DM. 1979. On size and sexual dimorphism in Austropotamobius pallipes (Lereboullet): a step in assessing the commercial exploitation potential of the native British freshwater crayfish. Aquac. 17: 345–358. doi:10.1016/0044-8486(79)90089-9
32. Rhodes CP, Holdich DM. 1984. Length-weight relationship, muscle production and proximate composition of the freshwater crayfish Austropotamobius pallipes (Lereboullet). Aquac. 37, 107-123. doi:10.1016/0044-8486(84)90068-1
33. Richman NI, Böhm M, Adams SB, Alvarez F, Bergey EA et al. 2015. Multiple drivers of decline in the global status of freshwater crayfish (Decapoda: Astacidea). Philosophical Transactions of the Royal Society B 370: 20140060. doi:10.1098/rstb.2014.0060
34. Ricker WE. 1973. Linear regressions in fishery research. J Fish Res Board Can. 30: 409–434.
35. Ricker WE. 1975. Computation and Interpretation of Biological Statistics of Fish Populations. No. 191, J Fish Res Board Can. Ottawa: Fisheries and Marine Service.
36. Romaire RP, Forester JS, Avault JW Jr. 1977. Length–weight relationships of two commercially important crayfishes of the genus Procambarus. Freshw Crayfish. 3: 463–470.
37. Sokal RR, Rohlf FJ. 1987. Introduction to Biostatistics. Second edition. New York, NY, USA: W.H. Freeman & Company, pp. 1–363.
38. TÜİK. 1977. Fisheries Statistics 1976-1977. Republic of Turkey Prime Ministry State Insitute of Statistics, Publication No: 947, Ankara.
39. TÜİK. 1982. Fisheries Statistics 1982. Republic of Turkey Prime Ministry State Insitute of Statistics,Publication No: 1066, Ankara.
40. TÜİK. 1985. Fisheries Statistics 1985. Republic of Turkey Prime Ministry State Insitute of Statistics, Publication No: 1221, Ankara.
41. TÜİK. 1986. Fisheries Statistics 1986. Republic of Turkey Prime Ministry State Insitute of Statistics, Publication No: 1265, Ankara.
42. TÜİK. 1987. Fisheries Statistics 1987. Republic of Turkey Prime Ministry State Insitute of Statistics, Publication No: 1389, Ankara.
43. TÜİK. 1988. Fisheries Statistics 1988-1989. Republic of Turkey Prime Ministry State Insitute of Statistics, Publication No: 1467, Ankara.
44. TÜİK. 2022. Fisheries Statistics of Prime Ministry State Planning Organization. Republic of Turkey, Ankara. [cited 2020 Feb 21]. Available from: https://biruni.tuik.gov.tr/medas/?locale=tr
45. Uzunay E, Soylu E. 2006. Sapanca Gölü’nde Yaşayan Sazan (Cyprinus carpio Linnaeus, 1758) ve Karabalık (Vimba vimba Linnaeus, 1758) ’ın Metazoan Parazitleri. Türkiye Parazitol Derg. 30 (2): 141-150 (in Turkish with an abstract in English).
46. Weya JM, Rumbiak NS, Hariyanto S, Irawan B, Soegianto A. 2017. Length – Weight Relationship and Condition Factor of Crayfish from South Sorong and Jayawijaya, Papua, Indonesia, Croatian J Fish. 75, 31-40. doi:10.1515/cjf-2017-0004
47. Yılmaz E, Harlıoğlu AG, Yılmaz A. 2011. The relationships between length-weight, and meat content of freshwater crayfish (Astacus leptodactylus Eschscholtz, 1823) caught from Gaga Lake (Ordu-Türkiye) EgeJFAS. 28 (3), 75-80 (in Turkish with an abstract in English).
48. Yüksel F. Duman E. 2012. An Investigation on Some Morphological Characteristics of Crayfish in Keban Dam Lake, J Fish Scien com. 6, 271–281 (in Turkish with an abstract in English). doi:10.3153/jfscom.akdeniz001