آمار
| تعداد نشریات | 13 |
| تعداد شمارهها | 656 |
| تعداد مقالات | 6,849 |
| تعداد مشاهده مقاله | 9,876,490 |
| تعداد دریافت فایل اصل مقاله | 9,240,461 |
Analysis of landings and environmental variables time series from the Caspian Sea | ||
| Environmental Resources Research | ||
| مقاله 1، دوره 5، شماره 1، فروردین 2017، صفحه 1-11 اصل مقاله (718.93 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22069/ijerr.2017.12124.1180 | ||
| نویسندگان | ||
| Hasan Fazli* 1؛ Abdol-Azim Ghanghermeh2؛ Reza Shahifar3 | ||
| 1Caspian Sea Ecology Research Center | ||
| 2Department of Geography, Faculty of Human Science, Golestan University, Gorgan, Iran | ||
| 3Iranian Fisheries Organization, Tehran, Iran | ||
| چکیده | ||
| In the present study, the time series encompassing the years 1950-2011 of commercial landings from the Caspian Sea were analyzed using min/max autocorrelation factor analysis (MAFA) and dynamic factor analysis (DFA). These aim was to identify trends and explore the relationships between the response variables (annual landings of 10 species/groups such as kilkas, kutum, common carp, pike perch, roach, shads, bream, mullets, seal and sturgeons) and explanatory variables (sea level and Volga river water volume). Landings were more highly correlated with environmental variables. Both techniques gave coherent results, indicating that the two most important trends in the response variables are: (i) a decrease in landings during second half of the time-series, and (ii) a fluctuating pattern. The main common trends obtained by MAFA and DFA were positive relation with kilkas, sturgeons, seal and shads. The most significant MAFA axis showed a steady stablility in the first half and a sharp decrease in the second half, which was similar to the most important common trend of the DFA. Species such as kilka, sturgeons, seal, shads, and perch were significantly positively related. On the contrary, landings of two species, mullts and kutum were negatively related to the first trend. Considering our results on the ecological and environmental data, these variables and impacts of human activities should be taken into account when managing coastal environments for the conservation of these species/groups in the Caspian basin. | ||
| کلیدواژهها | ||
| min/max autocorrelation factor analysis؛ dynamic factor analysis؛ Caspian Sea؛ landings؛ Time series | ||
| مراجع | ||
|
Artyukhin, E.N., and Zarkua, Z.G. 1986. Taxonomic status of sturgeon of the Rioni River (Black Sea basin). Voprosy Ikhtiologii 26, 61-67 (In Russian; English translation: J. Ichthyol. 26, 29-36). Badalov, F.G. 1972. The food of Clupeonella delicatula (Nordm.) and C. engrauliformis (Borodin) in Bol'shoy Kyzylagach Bay in the Caspian. Journal of Ichthyology. 12 (6), 1027-1030. Birstein, V.J. 1996. Sturgeons in the lower Danube: a trip to Romania. Sturgeon Quarterly, 4, 10-11. CSNRC. 2014. Hydroclimatology Bank of Caspian Sea, Water Research Institute, Ministry of Energy,Sari, Iran. Daskalov, G.M. 2003. Long-term changes in fish abundance and environmental indices in the Black Sea.Marine Ecology Progress Series. 255, 259-270. Daskalov, G.M., and Mamedov, E.V. 2007. Integrated fisheries assessment and possible causes for the collapse of anchovy kilka in the Caspian Sea. ICES Journal of Marine Science. 64, 503-511. De Meulenaer, T., and Raymakers, C. 1996. Sturgeons of the Caspian Sea and Investigation of the International Trade in Caviar. TRAFFIC International, Cambridge. Erzini, K. 2005. Trends in NE Atlantic landings (southern Portugal): identifying the relative importance of fisheries and environmental variables. Fisheries Oceanography. 14 (3), 195-209. Erzini, K., Inejih, C.A.O., and Stobberup, K.A. 2005. An application of two techniques for the analysis of short, multivariate non-stationary time-series of Mauritanian trawl survey data. ICES Journal of Marine Science. 62 (3), 353-359. Fazli, H., Zhang, C.I., Hay, D.E., Lee, C.W., Janbaz, A.A., and Borani, M.S. 2007. Population Dynamics and Stock Assessment of Common Kilka (Clupeonella cultriventris caspia) in the Caspian Sea. Iran.Journal of Fisheries Science. 7 (1), 47-70. Fazli, H., Ghaninejad, D., Janbaz, A.A., and Daryanabard, R. 2008. Population ecology parameters and biomass of golden grey mullet (Liza aurata) in Iranian waters of the Caspian Sea. Fisheries Research.93, 222-228.H. Fazli et al. / Environmental Resources Research 5, 1 (2017) 11. Fazli, H., Zhang, C.I., Hay, D.E., and Lee, C.W. 2009. Stock assessment and management implications of anchovy kilka (Clupeonella engrauliformis) in Iranian waters of the Caspian Sea, Fisheries Research.100, 103-108.
Ivanov, V.P. 2000. Biological Resources of the Caspian Sea. KaspNIRKh, Astrakhan. 96p. Ivanov, P.I., Kamakim, A.M., Ushivtzev, V.B., Shiganova, T.A., Zhukova, O., Aladin, N., Wilson, S.I.,Harbinson, G.R., and Dumont, H.J. 2000. Invasion of Caspian Sea by the come jellyfish Mnemiopsis leidyi (Ctenophora). Biological Invasion. 2, 255-258. Levin, A. 1997. The distribution and migration of sturgeons in the Caspian Sea. In: Sturgeon Stocks and Caviar Trade Workshop (Proceedings of the Sturgeon Stocks and Caviar Trade Workshop, Bonn,9 October–10 October, 1995). V.J. Birstein, A. Bauer and A. Kaiser- Pohlmann, eds. IUCN, Gland,Cambridge, Bonn, pp. 13-20. Ligas, A., Ranieri, S.De., Micheli, D., Reale, B., Sartor, P., Sbrana, M., and Belcari, P. 2010. Analysis of the landings and trawl survey time series from the Tyrrhenian Sea (NW Mediterranean). Fisheries Research. 105, 46-56. Milly, P.C.D., Betancourt, J., Falkenmark, M., Hirsch, R.M., Kundzewicz, Z.W., Lettenmaier, D.P., and Stouffer, R.J. 2008. Stationarity is dead: whither water management. Science. 319, 573-574. Nikonorov, I.V. 1964. Pump fishing with light and electric current, In: Modern Fishing Gear of the World 2: Fishing News (Books), London. pp. 577-579. Pauly, D., Christensen, V., Guenette, S., Pitcher, T.J., Sumaila, U.R., Walters, C.J., Watson, R., and Zeller, D. 2002. Towards sustainability in world fisheries. Nature, 418, 689-695. Pinnegar, J.K., Polunin, N.V.C., and Badalamenti, F. 2003. Long-term changes in the trophic level of western Mediterranean fishery and aquaculture landings. Canadian Journal of Fisheries Aquaculture Science. 60, 222-235. Prikhod’ko, B.I. 1979. About a relation between the harvest of juveniles of the Caspian anchovy kilka Clupeonella engrauliformis (Borodin) and temperature of water. Journal of Ichthyology. 19, 291-301.(In Russian). Raymakers, C. 2002. International trade in sturgeon and paddlefish species – the effect of CITES listing.International Review of Hydrobiology. 87, 525-537. Rochet, M.J., Prigent, M., Bertrand, J.A., Carpentier, A., Coppin, F., Delpech, J.P., Fontenelle, G.,Foucher, E., Mahé, K., Rostiaux, E., and Trenkel, V.M. 2008. Ecosystem trends: evidence for agreement between fishers’ perceptions and scientific information. ICES Journal of Marine Science.65, 1057-1068. Rodionov, S.N. 1994. Global and Regional Climate Interaction: the Caspian Sea Experience. Water Science and Technology Library, 11. Kluwer, Dordrecht. 233p. Roohi, A., Kideys, A., Sajjadi, A., Hashemian, A., Pourgholam, R., Fazli, H., Ganjian Khanari, A.,and Eker-Develi, E. 2010. Changes in biodiversity of phytoplankton, zooplankton, fishes and macrobenthos in the Southern Caspian Sea after the invasion of the ctenophore Mnemiopsis leidyi,Biological Invasions. 12, 2343-2361. Salmanov, M.A. 1999. Ecology and biological reproduction of the Caspian Sea. Edited by U.I. Sorokin. Baku. 397p. Secor, D.H., Arefiev, V., Nikolaev, A., and Sharov, A. 2000. Restoration of sturgeons: lessons from the Caspian Sea Sturgeon ranching programme. Fish and Fisheries. 1, 215-230. Sedov, S.I., Aseynova, A.A., and Paritskiy, Yu.A. 1998. Kilka. In Scientific Bases for Sustainable Fisheries and Regional Distribution of Commercial Objects of the Caspian Sea, pp. 83-89. Ed.by V.N. Belyaeva, V.P. Ivanov and V.K. Zilanov. VNIRO Publishing, Moscow. 167p (In Russian). Solow, A.R. 1994. Detecting changes in the composition of a multispecies community. Biometrics. 50, 556-565. Valdemarsen, J.W. 2001. Technological trends in capture fisheries. Ocean and Coastal Management,44, 635-651. Zuur, A., Fryer, R., Jolliffe, I., Dekker, R., and Beukema, J. 2003a. Estimating common trends in multivariate time series using dynamic factor analysis. Environmetrics. 14, 665-685. Zuur, A.F., Tuck, I.D., and Bailey, N. 2003b. Dynamic factor analysis to estimate common trends in fisheries time series. Canadian Journal of Fisheries Aquaculture and Science. 60, 542-552. Zuur, A.F., and Pierce, G.J. 2004. Common trends in Northeast Atlantic squid time series. Journal of Sea Research. 2, 57-72. Zuur, A.F., Ieno, E.N., and Smith, G.M. 2007. Analysing Ecological Data. Springer, London. | ||
|
آمار تعداد مشاهده مقاله: 884 تعداد دریافت فایل اصل مقاله: 906 |
||
سامانه مدیریت نشریات علمی. طراحی و پیاده سازی از سیناوب