Ocean Science Journal

  • 제43권4호
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  • Pages.175-182
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  • 2008
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  • 1738-5261(pISSN)
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  • 2005-7172(eISSN)
한국해양학회 (The Korean Society of Oceanography)
권호 표지

Influence of Seasonal Forcing on Habitat Use by Bottlenose Dolphins Tursiops truncatus in the Northern Adriatic Sea

  • 발행 : 2008.12.31
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초록

Bottlenose dolphins are the only cetaceans regularly observed in the northern Adriatic Sea, but they survive at low densities and are exposed to significant threats. This study investigates some of the factors that influence habitat use by the animals in a largely homogeneous environment by combining dolphin data with hydrological and physiographical variables sampled from oceanographic ships. Surveys were conducted year-round between 2003 and 2006, totalling 3,397 km of effort. Habitat modelling based on a binary stepwise logistic regression analysis predicted between 81% and 93% of the cells where animals were present. Seven environmental covariates were important predictors: oxygen saturation, water temperature, density anomaly, gradient of density anomaly, turbidity, distance from the nearest coast and bottom depth. The model selected consistent predictors in spring and summer. However, the relationship (inverse or direct) between each predictor and dolphin presence varied among seasons, and different predictors were selected in fall. This suggests that dolphin distribution changed depending on seasonal forcing. As the study area is relatively uniform in terms of bottom topography, habitat use by the animals seems to depend on complex interactions among hydrological variables, caused primarily by seasonal change and likely to determine shifts in prey distribution.

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참고문헌

  1. Afifi, A. and V. Clark. 1996. Computer-aided multivariate analysis. Chapman & Hall, London
  2. Azzellino, A., S. Gaspari, S. Airoldi, and B. Nani. 2008. Habitat use and preferences of cetaceans along the continental slope and the adjacent pelagic waters in the western Ligurian Sea. Deep-Sea Res. I, 55, 296-323 https://doi.org/10.1016/j.dsr.2007.11.006
  3. Baumgartner, M.F. 1997. The distribution of Risso's dolphin (Grampus griseus) with respect to the physiography of the northern Gulf of Mexico. Mar. Mammal Sci., 13, 614-638 https://doi.org/10.1111/j.1748-7692.1997.tb00087.x
  4. Bearzi, G., S. Agazzi, S. Bonizzoni, M. Costa, and A. Azzellino. 2008a. Dolphins in a bottle: Abundance, residency patterns and conservation of common bottlenose dolphins Tursiops truncatus in the semi-closed eutrophic Amvrakikos Gulf, Greece. Aquat. Conserv., 18(2), 130-146 https://doi.org/10.1002/aqc.843
  5. Bearzi, G., C.M. Fortuna, and R.R. Reeves. 2008b. Ecology and conservation of common bottlenose dolphins Tursiops truncatus in the Mediterranean Sea. Mamm. Rev. doi: 10.1111/j.1365-2907.2008.00133.x
  6. Bearzi, G., D. Holcer, and G. Notarbartolo di Sciara. 2004. The role of historical dolphin takes and habitat degradation in shaping the present status of northern Adriatic cetaceans. Aquat. Conserv., 14, 363-379 https://doi.org/10.1002/aqc.626
  7. Bearzi, G., G. Notarbartolo di Sciara, and E. Politi. 1997. Social ecology of bottlenose dolphins in the Kvarneric (northern Adriatic Sea). Mar. Mammal Sci., 13, 650-668 https://doi.org/10.1111/j.1748-7692.1997.tb00089.x
  8. Bearzi, G., E. Politi, C.M. Fortuna, L. Mel, and G. Notarbartolo di Sciara. 2000. An overview of cetacean sighting data from the northern Adriatic Sea: 1987-1999. Eur. Res. Cetaceans, 14, 356-361
  9. Bearzi, G., E. Politi, and G. Notarbartolo di Sciara. 1999. Diurnal behavior of free-ranging bottlenose dolphins in the Kvarneric (northern Adriatic Sea). Mar. Mammal Sci., 15, 1065-1097 https://doi.org/10.1111/j.1748-7692.1999.tb00878.x
  10. Bombace, G. 1992. Fisheries of the Adriatic Sea. p. 57-67. In: Marine eutrophication and population dynamics, ed by G. Colombo, I. Ferrari, V.U. Ceccherelli, and R. Rossi. Olsen & Olsen, Fredensborg, Denmark
  11. Brager, S., J.A. Harraway, and B.F.J. Manly. 2003. Habitat selection in a coastal dolphin species (Cephalorhynchus hectori). Mar. Biol., 143, 233-244 https://doi.org/10.1007/s00227-003-1068-x
  12. Canadas, A., R. Sagarminaga, R. De Stephanis, E. Urquiola, and P.S. Hammond. 2005. Habitat preference modelling as a conservation tool: proposals for marine protected areas for cetaceans in southern Spanish waters. Aquat. Conserv., 15, 495-521 https://doi.org/10.1002/aqc.689
  13. Canadas, A., R. Sagarminaga, and S. Garcia-Tiscar. 2002. Cetacean distribution related with depth and slope in the Mediterranean waters off southern Spain. Deep-Sea Res. I, 49, 2053-2073 https://doi.org/10.1016/S0967-0637(02)00123-1
  14. Davis, R.W., J.G. Ortega-Ortiz, C.A. Ribi, W.E. Evans, D.C. Biggs, P.H. Ressler, R.B. Cady, R.R. Leben, K.D. Mullin, and B. Würsig. 2002. Cetacean habitat in the northern oceanic Gulf of Mexico. Deep-Sea Res. I, 49, 121-142 https://doi.org/10.1016/S0967-0637(01)00035-8
  15. Degobbis, D., R. Precali, I. Ivancic, N. Smodlaka, D. Fuks and S. Kveder. 2000. Long-term changes in the northern Adriatic ecosystem related to anthropogenic eutrophication. Int. J. Environ. Pollut., 13, 495-533 https://doi.org/10.1504/IJEP.2000.002332
  16. Efron, B. and R.J. Tibshirani. 1993. An introduction to the bootstrap. Chapman & Hall, London
  17. Evans, W.E. 1975. Distribution, differentiation of populations and other aspects of the natural history of Delphinus delphis Linnaeus in the Northeastern Pacific. Ph.D. Thesis, University of California, Los Angeles, CA. 145 p
  18. Ferguson, M.C., J. Barlow, P. Fiedler, S.B. Reilly, and T. Gerrodette. 2006. Spatial models of delphinid (family Delphinidae) encounter rate and group size in the eastern tropical Pacific Ocean. Ecol. Model., 193, 645-662 https://doi.org/10.1016/j.ecolmodel.2005.10.034
  19. Fiedler, P.C., J. Barlow, and t. Gerrodette. 1998. Dolphin prey abundance determined from acoustic backscatter data in eastern pacific surveys. Fishery Bull., 96, 237-247
  20. Fortuna, C.M. 2006. Ecology and conservation of bottlenose dolphins (Tursiops truncatus) in the north-eastern Adriatic Sea. Ph.D. Thesis, University of St. Andrews, U.K. 250 p
  21. Franco, P. and A. Michelato. 1992. Northern Adriatic Sea: oceanography of the basin proper and of the western coastal zone. Sci. Total Environ. Suppl., 35-62
  22. Goold, J.C. 1998. Acoustic assessment of populations of common dolphin off the west Wales coast, with perspectives from satellite infrared imagery. J. Mar. Biol. Assoc. U.K., 78, 1353-1364 https://doi.org/10.1017/S0025315400044544
  23. Griffin, R.B. and N.J. Griffin. 2003. Distribution, habitat partitioning, and abundance of Atlantic spotted dolphins, bottlenose dolphins, and loggerhead sea turtles on the eastern Gulf of Mexico continental shelf. Gulf of Mexico Science, 2003, 23-34
  24. Grilli, F., M. Marini, D. Degobbis, C.R. Ferrari, P. Fornasiero, A. Russo, M. Gismondi, T. Djakovac, R. Precali, and R. Simonetti. 2005. Circulation and horizontal fluxes in the northern Adriatic Sea in the period June 1999-July 2002. Part II: Nutrients transport. Sci. Total Environ., 353, 115-125 https://doi.org/10.1016/j.scitotenv.2005.09.011
  25. Guisan, A. and N.E. Zimmermann. 2000. Predictive habitat distribution models in ecology. Ecol. Model., 135, 147-186 https://doi.org/10.1016/S0304-3800(00)00354-9
  26. Hooker, S.K., H. Whitehead, and S. Gowans. 1999. Marine Protected Area design and the spatial and temporal distribution of cetaceans in a submarine canyon. Cons. Biol., 13, 592-602 https://doi.org/10.1046/j.1523-1739.1999.98099.x
  27. Hosmer, D.W. and S. Lemeshow. 2000. Applied logistic regression, 2nd Ed. John Wiley & Sons, New York
  28. Hui, C.A. 1979. Undersea topography and distribution of dolphins of the genus Delphinus in the Southern California bight. J. Mammal., 60, 521-527 https://doi.org/10.2307/1380092
  29. Hui, C.A. 1985. Undersea topography and the comparative distributions of two pelagic cetaceans. Fishery Bull., 83, 472-475
  30. Kruskal, W.H. and W.A. Wallis. Use of ranks in one-criterion variance analysis. J. Am. Stat. Assoc., 47, 583-621 https://doi.org/10.2307/2280779
  31. Mullin, K.D., W. Hoggard, C.L. Roden, R.R. Lohoefener, C.M. Rogers, and B. Taggart. 1994. Cetaceans on the upper continental slope in the north-central Gulf of Mexico. Fishery Bull., 92, 773-786
  32. Notarbartolo Di Sciara, G., M.C. Venturino, M. Zanardelli, G. Bearzi, J.F. Borsani, and B. Cavalloni. 1993. Cetaceans in the central Mediterranean Sea: distribution and sighting frequencies. Ital. J. Zool., 60, 131-138 https://doi.org/10.1080/11250009309355800
  33. Polacheck, T. 1987. Relative abundance, distribution and interspecific relationship of cetacean schools in the Eastern Tropical Pacific. Mar. Mammal Sci., 13, 614-638 https://doi.org/10.1111/j.1748-7692.1997.tb00087.x
  34. Pugnetti, A., F. Acri, L. Alberighi, D. Barletta, M. Bastianini, F. Bernardi-Aubry, A. Berton, F. Bianchi, G. Socal, and C. Totti. 2004. Phytoplankton photosynthetic activity and growth rates in the NW Adriatic Sea. Chem. Ecol., 2, 399-409
  35. Reilly, S.B. 1990. Seasonal changes in distribution and habitat differences among dolphins in the eastern tropical Pacific. Mar. Ecol. Prog. Ser., 66, 1-11 https://doi.org/10.3354/meps066001
  36. Russo, A., S. Rabitti, and M. Bastianini. 2002. Decadal climatic anomalies in the northern Adriatic Sea inferred from a new oceanographic data set. Mar. Ecol. Evol. Persp., 23, 340-351 https://doi.org/10.1111/j.1439-0485.2002.tb00032.x
  37. Selzer, L.A. and P.M. Payne. 1988. The distribution of white-sided (Lagenorhynchus acutus) and common dolphins (Delphinus delphis) vs. environmental features of the continental shelf of the northeastern United States. Mar. Mammal Sci., 4, 141-153 https://doi.org/10.1111/j.1748-7692.1988.tb00194.x
  38. Shane, S.H. 1990. Comparison of bottlenose dolphin behavior in Texas and Florida, with a critique of methods for studying dolphin behavior. p. 541-558. In: The bottlenose dolphin, ed. by S. Leatherwood and R.R. Reeves. Academic Press, San Diego, CA
  39. Silber, G.K., M.W. Newcomer, P.C. Silber, H. Perez-Cortes, and G.M. Ellis. 1994. Cetaceans of the northern Gulf of California: distribution, occurrence, and relative abundance. Mar. Mammal Sci., 10, 283-298 https://doi.org/10.1111/j.1748-7692.1994.tb00483.x
  40. Socal, G., A. Pugnetti, and L. Alberighi. 2002. Observations on phytoplankton productivity in relation to hydrography in NW Adriatic. Chem. Ecol., 18, 61-73 https://doi.org/10.1080/02757540212686
  41. Taylor, A.H., A.J. Watson, and J.E. Robertson. 1992. The influence of the spring phytoplankton bloom on carbon dioxide and oxygen concentrations in the surface waters of the northeast Atlantic during 1989. Deep-Sea Res. I, 39, 137-152 https://doi.org/10.1016/0198-0149(92)90101-X
  42. Tynan, C.T., D.G. Ainley, J.A. Barth, T.J. Cowles, S.D. Pierce, and L.B. Spear. 2005. Cetacean distributions relative to ocean processes in the northern California Current System. Deep-Sea Res. II, 52, 145-167 https://doi.org/10.1016/j.dsr2.2004.09.024
  43. Webster, R. and M.A. Oliver. 2001. Geostatistics for environmental scientists. Statistics in Practice series. John Wiley & Sons, Chichester, U.K.
  44. Yen, P.W., W.J. Sydeman, and K.D. Hyrenbach. 2004. Marine bird and cetacean associations with bathymetric habitats and shallow-water topographies: implications for trophic transfer and conservation. J. Marine Syst., 50, 79-99 https://doi.org/10.1016/j.jmarsys.2003.09.015
  45. Zavatarelli, M., F. Raicich, D. Bregant, A. Russo, and A. Artegiani. 1998. Climatological biogeochemical characteristics of the Adriatic Sea. J. Marine Syst., 18, 227-263 https://doi.org/10.1016/S0924-7963(98)00014-1