Density Effect and Diversity of Fish in Water System at Both Reservoirs in the Youngsan-ri, Goseong-gun Huh, Man Kyu; Choi, Byoung-Ki;
Four sites and one site were used to analyze fish diversity at the water systems of the Sineun reservoir and the Jeonchon reservoir, respectively. The field experiments were conducted to test the density dependence that could lead to population regulation by artificial inferences and environmental changes. We examined the effects of environmental factors on fish densities using SMATR freeware. It was estimated to be reduced to the density effect at four sites in 2012. Shannon-Weaver indices of the diversity (H’) of the Sineun reservoir were similar to those of the Jeonchon reservoir. Species diversity was in a range of 0.645 to 2.105. The H’ value of the upper region was higher than those of middle and low regions were, and values of richness were lower in downstream than upstream. Using the maximum likelihood solution for the removal estimators of two low regions of the river stations, the estimated migration probabilities from the resident fish to the migrated fish for five species (Cyprinus cuvieri, Carassius auratus, Pseudorasbora parva, Misgurnus mizolepis, and Oryzias latipes) had a mean of 0.623. Especially, migration probabilities from the Jeonchon reservoir to the Sineun reservoir for five species were high (a mean of 0.681). The period of migration was suggested to be about one month because of short geographical distances (50 m). We found no significant difference between the three categories in the distribution of the other four species, indicating the species probability was similar among stations.
Density dependence;environmental factor;fish;species diversity;Youngsan-ri;
Alatato, P. A. 1981. Problems in the measurement of evenness in ecology. Oikos 37, 199-204.
Caley, M. J. 1998. Age-specific mortality rates in reef fishes:evidence and implications. Aust. J. Ecol. 23, 241-245.
Chesson, P. 2000. Mechanisms of maintenance of species diversity. Annu. Rev. Ecol. Syst. 31, 343-366.
Choi, K. C. 2001. Guide of Korean Fresh Water Fish in Color(excluded Lepidoptera), pp. 1-671, Hyeoamsa, Seoul, Korea.
Dodson, S. I., Arnott, S. E. and Cottingham, K. L. 2000. The relationship in lake communities between primary productivity and species richness. Ecology 81, 2662-2679.
Forresster, G. E., Steele, M. A., Samhouri, J. F., Evans, B. and Vance, R. R. 2008. Spatial density dependence scales up but does not produce temporal density dependence in a reef fish. Ecology 89, 2980-2985.
Francis, R. C., Hixon, M. A., Clarke, M. E., Murawski, S. A. and Ralston, S. 2007. Ten commandments for ecosystem based fisheries scientists. Fisheries 32, 217-233.
Gamfeldt, L., Hillebrand, H. and Jonsson, P. R. 2008. Multiple functions increase the importance of biodiversity for overall ecosystem functioning. Ecology 89, 1223-1231.
Hixon, M. A., Anderson, T. W., Buch, K. L., Johnson, D. W., Mcleod, J. B. and Stallings, C. D. 2012. Density dependence and population regulation in marine fish: a large-scale, long-term field manipulation. Ecol. Monog. 82, 467-489.
Holbrook, S. J. and Schmitt, R. J. 2002. Competition for shelter space causes density-dependent predation mortality in damselfishes. Ecology 83, 2855-2868.
Jawad, L. 2003. Impact of environmental change on the freshwater fish fauna of Iraq. Inter. J. Environ. Stud. 60, 581-593.
Johnson, D. W. 2006. Predation, habitat complexity, and variation in density-dependent mortality of temperate reef fishes. Ecology 87, 1179-1188.
Mittelbach, G. G., Steiner, C. F., Scheiner, S. M., Gross, K. L. and Gough, L. 2001. What is the observed relationship between species richness and productivity? Ecology 82, 2381-2396.
Neale, P. J., Bossard, P., Huot, Y. and Sommaruga, R. 2001. Incident and in situ irradiance in Lakes Cadagno and Lucerne: A comparison of methods and models. Aquat. Sci. 63, 250-264.
Nelson, J. S. 1984. Fishes of the World, pp. 1-523, 2nd ed., John Wiley and Sons, NY.
Pielou, E. C. 1969. An Introduction to Mathematical Ecology, pp. 1-326, John Wiley, NY.
Pielou, E. C. 1975. Ecological Diversity, 1-165, John Wiley and Sons, NY.
Shannon, C. E. and Weaver, W. 1963. The Mathematical Theory of Communications, pp. 1-117, University of Illinois press, Urbana.
Steele, M. A. and Forrester, G. E. 2005. Small-scale field experiments accurately scale up to predict density dependence in reef fish populations at large scales. Proc. Natl. Acad. Sci. USA 102, 13513-13516.
Warton, D. I., Wright, I. J., Falster, D. S. and Westoby, M. 2006. Bivariate line fiting methods for allometry. Biol. Rev. 81, 259-291.