Araştırma Makalesi
Yıl 2021,
Cilt: 7 Sayı: 2, 157 - 165, 26.08.2021
Öz
The impact of hydrological regimes on the productivity in lake ecosystems has received considerable attention in recent decades. This study tested the hypothesis that water level fluctuations influence the fisheries productivity of Lake Van. Monthly water level data from 2000 to 2014 were obtained from Hydroweb and fisheries data corresponding to the same time period were acquired from the Turkish Statistical Institute. In order to test whether water level fluctuations demonstrated significant concordance with fish landings, landings data as a dependent variable, and seasonal water level amplitude and mean annual water level as independent variables were used in a linear regression analysis. The regression analysis proved insignificant results. The general trend of a linear decline, with a rate of -575 tonnes per year, observed in the landings did not match the seasonal and inter-annual water level variations which occurred in the lake during the same period. The consistently declining yields might result from a prolonged overexploitation and/or a constant recruitment failure. The estimated values of the seasonal and inter-annual relative fluctuation index (0.402 and 0.097, respectively) were rather low indicating that Lake Van is hydrologically stable with limited aquatic/terrestrial transition zone interactions and a relatively low nutrient load.
Anahtar Kelimeler
Kaynakça
- Agaypi MZ. 2000. A note on the relationship between catch and water level. In: Craig, JF, editor. Sustainable fish production in Lake Nasser: Ecological basis and management policy. Penang (Malaysia): the International Center for Living Aquatic Resources Management (ICLARM) Conference Proceedings. p. 85-86.
- Altunkaynak A, Özger M, Şen Z. 2003. Triple diagram model of level fluctuations in Lake Van, Turkey. Hydrol Earth Syst Sc. 7(2):235-244. doi: 10.5194/hess-7-235-2003
- Atıcı AA. 2017. Effects of sand extraction from the Karasu River (Van) on water quality and tarek (Alburnus tarichi, Guldenstaedt 1814) population [PhD Thesis]. Yüzüncü Yıl University. 210 p. [in Turkish]
- Coops H, Beklioğlu M, Chrisman TL. 2003. The role of water-level fluctuations in shallow lake ecosystems-workshop conclusions. Hydrobiologia. 506(1):23-27. doi: 10.1023/B:HYDR.0000008595.14393.77
- Crétaux JF, Jeliski W, Calmant S, Kouraev A, Vuglinski V, Bergé NM, Gennero MC, Nino F, Abarca Del Rio R, Cazenave A, Maisongrande P. 2011. SOLS: A Lake database to monitor in near real time water level and storage variations from remote sensing data. Adv Space Res. 47(9):1497-1507. doi: 10.1016/j.asr.2011.01.004
- Davies PE, Sloane RD. 1988. Long-term changes in brown trout and rainbow trout populations in Great Lake, Tasmania. N Am J Fish Manage. 8(4):463-474. doi:10.1577/1548-8675(1988)008<0463:LTCIBT>2.3.CO;2
- Degens ET, Wong HK, Kempe S, Kurtman F. 1984. A geological study of Lake Van, eastern Turkey. Geol Rundsch. 73(2):701-734. doi: 10.1007/BF01824978
- Elp M, Şen F, Çetinkaya O. 2006. The problems encountered by fish populations living in Lake Van basin and their possible solutions. Ege J Fish Aquat Sci. 23(1/3):407-412. [in Turkish]
- Furse MT, Kirk RC, Morgan PR, Tweddle D. 1979. Fishes: Distribution and biology in relation to changes. In: Kalk M, McLachlan AJ, Howard-Williams C, editors. Lake Chilwa. Dordrecht, Netherlands: Springer. p. 175-208.
- Gownaris NJ, Pikitch EK, Aller JY, Kaufman LS, Kolding J, Lwiza, KMM, Obiero KO, Ojwang WO, Malala JO, Rountos KJ. 2017. Fisheries and water level fluctuations in the world's largest desert lake. Ecohydrol. 10(1):e1769. doi: 10.1002/eco.1769
- Gownaris NJ, Rountos KJ, Kaufman LS, Kolding J, Lwiza KMM, Pikitch EK. 2018. Water level fluctuations and the ecosystem functioning of lakes. J Great Lakes Res. 44(6):1154-1163. doi: 10.1016/j.jglr.2018.08.005
- Kadıoğlu M, Şen Z, Batur E. 1997. The greatest soda-water lake in the world and how it is influenced by climatic change. Ann Geophys. 15(11):1489-1497. doi: 10.1007/s00585-997-1489-9
- Karenge LP, Kolding J. 1995. On the relationship between hydrology and fisheries in man-made Lake Kariba, Central Africa. Fish Res. 22(3-4):205-226. doi: 10.1016/0165-7836(94)00325-Q
- Kolding J. 1992. A summary of Lake Turkana: An ever-changing mixed environment. Int Ver The. 23(1):25-35.doi: 10.1080/05384680.1992.11904005
- Kolding J, van Zwieten PAM. 2012. Relative lake level fluctuations and their influence on productivity and resilience in tropical lakes and reservoirs. Fish Res. 115-116:99-109. doi: 10.1016/j.fishres.2011.11.008
- Leira M, Cantonati M. 2008. Effects of water-level fluctuations on lakes: An annotated bibliography. Hydrobiologia. 613(1):171-184. doi: 10.1007/s10750-008-9465-2
- Oğuz AR. 2013. Environmental regulation of mitochondria-rich cells in Chalcalburnus tarichi (Pallas, 1811) during reproductive migration. J Membrane Biol. 246(3):183-188. doi: 10.1007/s00232-012-9518-3
- R Core Team. 2019. R: A language and environment for statistical computing, R foundation for statistical computing, Version 3.5.3; [cited 2019 Dec 24]. Available from http://www.R-project.org
- Reimer A, Landmann G, Kempe S. 2009. Lake Van, eastern Anatolia, hydrochemistry and history. Aquat Geochem. 15(1-2):195-222. doi: 10.1007/s10498-008-9049-9
- Sarı M. 2008. Integrated sustainable fisheries management for pearl mullet of Lake Van, Turkey. In: Ozkaraova Gungor EB, editor. Environmental Technologies. Rijeka, Croatia: IntechOpen. p. 177-192.
- Shafaei M, Kisi O. 2016. Lake level forecasting using wavelet-SVR, wavelet-ANFIS and wavelet-ARMA conjunction models. Water Resour Manag. 30(1):79-97. doi: 10.1007/s11269-015-1147-z
- Sokal RR, Rohlf FJ. 2012. Biometry. The principles and practice of statistics in biological research. 4th ed. New York (NY): W. H. Freeman 937 p.
- Şen F, Paruğ ŞŞ, Elp M. 2015. Projections on past, present and future of tarek (Alburnus tarichi, Güldenstädt, 1814). Yüzüncü Yıl University Journal of Agricultural Sciences. 25(3):347-356. [in Turkish]
- Tıraşın EM, Ünlüoğlu A. 2012. Demersal and deep water fisheries resources in the Turkish Seas. In: Tokaç A, Gücü AC, Öztürk B, editors. The state of the Turkish fisheries. İstanbul: TÜDAV. p. 28-91.
- TurkStat. 2020. Turkish Statistical Institute. Quantity of caught fresh-water products. [cited 2020 Sep 01]. Available from https://biruni.tuik.gov.tr/medas/?kn=97&locale=tr
- Tweddle D, Magasa JH, 1989. Assessment of multispecies cichlid fisheries of the southeast arm of Lake Malawi, Africa. ICES J Mar Sci. 45(2):209-222. doi: 10.1093/icesjms/45.2.209
- Wantzen KM, Rothhaupt KO, Mörtl M, Cantonati M, Tóth LG, Fischer P. 2008. Ecological effects of water-level fluctuations in lakes: An urgent issue. Hydrobiologia. 613(1):1-4. doi: 10.1007/s10750-008-9466-1
- Williams R. 1972. Relationship between the water levels and the fish catches in Lakes Mweru and Mweru Wa Ntipa, Zambia. The African Journal of Tropical Hydrobiology and Fisheries. 2(1):21-32.
- Zohary T, Ostrovsky I. 2011 Ecological impacts of excessive water level fluctuations in stratified freshwater lakes. Inland Waters. 1(1): 47-59. doi: 10.5268/IW-1.1.406
Yıl 2021,
Cilt: 7 Sayı: 2, 157 - 165, 26.08.2021
Öz
Hidrolojik rejimlerin göl ekosistemlerindeki verimlilik üzerindeki etkisi son yıllarda büyük ilgi görmektedir. Bu çalışmada, Van Gölü su seviyesindeki değişimlerin balıkçılık üretimini etkilediğini öngören hipotez test edilmiştir. 2000-2014 yılları arasına ait aylık su seviyesi verileri Hydroweb'den, aynı döneme karşılık gelen balıkçılık verileri ise Türkiye İstatistik Kurumu'ndan alınmıştır. Su seviyesindeki değişimlerin, avlanan balık miktarları ile anlamlı bir ilişki gösterip göstermediğini test etmek için doğrusal regresyon analizinde bağımlı değişken olarak avcılık verileri ile bağımsız değişken olarak mevsimsel su seviyesi genliği (amplitüt) ve ortalama yıllık su seviyesi değerleri kullanılmıştır. Regresyon analizi sonucunda anlamlı bir ilişki bulunamamış, avcılık miktarlarında gözlenen yıllık -575 tonluk doğrusal düşüş trendi, aynı dönemde gölde meydana gelen mevsimsel ve yıllık su seviyesi değişimleriyle uyumluluk göstermemiştir. Av ürün miktarlarındaki kalıcı düşüşün sebebi, uzun süreli aşırı avcılık ve/veya stoka katılımda süregelen azalmalar olabilir. Mevsimsel ve yıllık bağıl dalgalanma endeks değerleri sırasıyla 0,402 ve 0,097 olarak hesaplanmıştır. Bu değerlerin oldukça düşük olması Van Gölü'nün hidrolojik olarak kararlı olduğunu, su/kara geçiş bölgesi etkileşimlerinin sınırlı düzeyde kaldığını ve göle nispeten düşük nütrient girişi gerçekleştiğini göstermektedir.
Anahtar Kelimeler
Kaynakça
- Agaypi MZ. 2000. A note on the relationship between catch and water level. In: Craig, JF, editor. Sustainable fish production in Lake Nasser: Ecological basis and management policy. Penang (Malaysia): the International Center for Living Aquatic Resources Management (ICLARM) Conference Proceedings. p. 85-86.
- Altunkaynak A, Özger M, Şen Z. 2003. Triple diagram model of level fluctuations in Lake Van, Turkey. Hydrol Earth Syst Sc. 7(2):235-244. doi: 10.5194/hess-7-235-2003
- Atıcı AA. 2017. Effects of sand extraction from the Karasu River (Van) on water quality and tarek (Alburnus tarichi, Guldenstaedt 1814) population [PhD Thesis]. Yüzüncü Yıl University. 210 p. [in Turkish]
- Coops H, Beklioğlu M, Chrisman TL. 2003. The role of water-level fluctuations in shallow lake ecosystems-workshop conclusions. Hydrobiologia. 506(1):23-27. doi: 10.1023/B:HYDR.0000008595.14393.77
- Crétaux JF, Jeliski W, Calmant S, Kouraev A, Vuglinski V, Bergé NM, Gennero MC, Nino F, Abarca Del Rio R, Cazenave A, Maisongrande P. 2011. SOLS: A Lake database to monitor in near real time water level and storage variations from remote sensing data. Adv Space Res. 47(9):1497-1507. doi: 10.1016/j.asr.2011.01.004
- Davies PE, Sloane RD. 1988. Long-term changes in brown trout and rainbow trout populations in Great Lake, Tasmania. N Am J Fish Manage. 8(4):463-474. doi:10.1577/1548-8675(1988)008<0463:LTCIBT>2.3.CO;2
- Degens ET, Wong HK, Kempe S, Kurtman F. 1984. A geological study of Lake Van, eastern Turkey. Geol Rundsch. 73(2):701-734. doi: 10.1007/BF01824978
- Elp M, Şen F, Çetinkaya O. 2006. The problems encountered by fish populations living in Lake Van basin and their possible solutions. Ege J Fish Aquat Sci. 23(1/3):407-412. [in Turkish]
- Furse MT, Kirk RC, Morgan PR, Tweddle D. 1979. Fishes: Distribution and biology in relation to changes. In: Kalk M, McLachlan AJ, Howard-Williams C, editors. Lake Chilwa. Dordrecht, Netherlands: Springer. p. 175-208.
- Gownaris NJ, Pikitch EK, Aller JY, Kaufman LS, Kolding J, Lwiza, KMM, Obiero KO, Ojwang WO, Malala JO, Rountos KJ. 2017. Fisheries and water level fluctuations in the world's largest desert lake. Ecohydrol. 10(1):e1769. doi: 10.1002/eco.1769
- Gownaris NJ, Rountos KJ, Kaufman LS, Kolding J, Lwiza KMM, Pikitch EK. 2018. Water level fluctuations and the ecosystem functioning of lakes. J Great Lakes Res. 44(6):1154-1163. doi: 10.1016/j.jglr.2018.08.005
- Kadıoğlu M, Şen Z, Batur E. 1997. The greatest soda-water lake in the world and how it is influenced by climatic change. Ann Geophys. 15(11):1489-1497. doi: 10.1007/s00585-997-1489-9
- Karenge LP, Kolding J. 1995. On the relationship between hydrology and fisheries in man-made Lake Kariba, Central Africa. Fish Res. 22(3-4):205-226. doi: 10.1016/0165-7836(94)00325-Q
- Kolding J. 1992. A summary of Lake Turkana: An ever-changing mixed environment. Int Ver The. 23(1):25-35.doi: 10.1080/05384680.1992.11904005
- Kolding J, van Zwieten PAM. 2012. Relative lake level fluctuations and their influence on productivity and resilience in tropical lakes and reservoirs. Fish Res. 115-116:99-109. doi: 10.1016/j.fishres.2011.11.008
- Leira M, Cantonati M. 2008. Effects of water-level fluctuations on lakes: An annotated bibliography. Hydrobiologia. 613(1):171-184. doi: 10.1007/s10750-008-9465-2
- Oğuz AR. 2013. Environmental regulation of mitochondria-rich cells in Chalcalburnus tarichi (Pallas, 1811) during reproductive migration. J Membrane Biol. 246(3):183-188. doi: 10.1007/s00232-012-9518-3
- R Core Team. 2019. R: A language and environment for statistical computing, R foundation for statistical computing, Version 3.5.3; [cited 2019 Dec 24]. Available from http://www.R-project.org
- Reimer A, Landmann G, Kempe S. 2009. Lake Van, eastern Anatolia, hydrochemistry and history. Aquat Geochem. 15(1-2):195-222. doi: 10.1007/s10498-008-9049-9
- Sarı M. 2008. Integrated sustainable fisheries management for pearl mullet of Lake Van, Turkey. In: Ozkaraova Gungor EB, editor. Environmental Technologies. Rijeka, Croatia: IntechOpen. p. 177-192.
- Shafaei M, Kisi O. 2016. Lake level forecasting using wavelet-SVR, wavelet-ANFIS and wavelet-ARMA conjunction models. Water Resour Manag. 30(1):79-97. doi: 10.1007/s11269-015-1147-z
- Sokal RR, Rohlf FJ. 2012. Biometry. The principles and practice of statistics in biological research. 4th ed. New York (NY): W. H. Freeman 937 p.
- Şen F, Paruğ ŞŞ, Elp M. 2015. Projections on past, present and future of tarek (Alburnus tarichi, Güldenstädt, 1814). Yüzüncü Yıl University Journal of Agricultural Sciences. 25(3):347-356. [in Turkish]
- Tıraşın EM, Ünlüoğlu A. 2012. Demersal and deep water fisheries resources in the Turkish Seas. In: Tokaç A, Gücü AC, Öztürk B, editors. The state of the Turkish fisheries. İstanbul: TÜDAV. p. 28-91.
- TurkStat. 2020. Turkish Statistical Institute. Quantity of caught fresh-water products. [cited 2020 Sep 01]. Available from https://biruni.tuik.gov.tr/medas/?kn=97&locale=tr
- Tweddle D, Magasa JH, 1989. Assessment of multispecies cichlid fisheries of the southeast arm of Lake Malawi, Africa. ICES J Mar Sci. 45(2):209-222. doi: 10.1093/icesjms/45.2.209
- Wantzen KM, Rothhaupt KO, Mörtl M, Cantonati M, Tóth LG, Fischer P. 2008. Ecological effects of water-level fluctuations in lakes: An urgent issue. Hydrobiologia. 613(1):1-4. doi: 10.1007/s10750-008-9466-1
- Williams R. 1972. Relationship between the water levels and the fish catches in Lakes Mweru and Mweru Wa Ntipa, Zambia. The African Journal of Tropical Hydrobiology and Fisheries. 2(1):21-32.
- Zohary T, Ostrovsky I. 2011 Ecological impacts of excessive water level fluctuations in stratified freshwater lakes. Inland Waters. 1(1): 47-59. doi: 10.5268/IW-1.1.406
Toplam 29 adet kaynakça vardır.
Ayrıntılar
| Birincil Dil | İngilizce |
|---|---|
| Konular | Balıkçılık Yönetimi |
| Bölüm | Araştırma Makalesi |
| Yazarlar | |
| Yayımlanma Tarihi | 26 Ağustos 2021 |
| Yayımlandığı Sayı | Yıl 2021Cilt: 7 Sayı: 2 |