Browse > Article
http://dx.doi.org/10.5657/kfas.2009.42.6.642

Abundance Estimates of the Minke Whale, Balaenoptera acutorostrata, in the East Sea, Korea  

Park, Kyum-Joon (Cetacean Research Institute)
An, Yong-Rock (Cetacean Research Institute)
Kim, Zang-Geun (Cetacean Research Institute)
Choi, Seok-Gwan (Cetacean Research Institute)
Moon, Dae-Yeon (Cetacean Research Institute)
Park, Ji-Eun (Cetacean Research Institute)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.42, no.6, 2009 , pp. 642-649 More about this Journal
Abstract
Line transect data from sighting surveys conducted in the East Sea, Korea in 2000, 2002, 2003, 2005 and 2006 were analysed to estimate densities and numbers of minke whale. The half-normal model was fit to the survey in 2000 and the uniform model was the most fitable to the survey in 2002 and 2006, and the surveys in 2003 and 2005 were fit by the hazard-rate model. The estimated density of minke whale in the survey in 2000 was estimated as 0.026 individuals/$km^2$ (CV=0.409; 95% CI 0.011-0.065) and was higher than the survey in 2002 estimated as 0.018 individuals/$km^2$ (CV=0.329; 95% CI: 0.009-0.034). The estimated density of minke whale in the survey in 2003 was estimated as 0.033 individuals/$km^2$ (95% CI: 0.008-0.139) with the highest CV 0.760. The highest density was estimated in the survey in 2005 with 0.053 individuals/$km^2$ (95% CI: 0.020-0.141). The Lowest CV (0.306) was estimated in the survey in 2006 with 0.025 individuals/$km^2$ (95% CI: 0.014-0.046). A total of 500 bootstrap samples were generated within each stratum. Density, CV and 95% CI of each surveys were increased than analytic results except the survey in 2003. There were no increasing or decreasing annual trends in the density of minke whales observed during the study period. A long-term monitor and survey is needed to assess project minke whale abundance in the East Sea.
Keywords
Line transect; Minke whale; East Sea; Density; Abundance;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Akaike H. 1985. Prediction and entropy. In: A Celebration of Statistics. Atkinson AC and Feinberg SE, eds. Springer-Verlag, Berlin, 1-24
2 Buckland ST, Anderson DR, Burnham KP, Laake JL, Borchers DL and Thomas L. 2001. Introduction to Distance Sampling: Estimating numbers of biological populations. Oxford, New York
3 IWC (International Whaling Commission). 2001. Report of the scientific committee, Annex D. Report of the sub-committee on the RMP. J Cetacean Res Manag 3 (Suppl.), 90-125
4 Matsuura Y. 1936. On the lesser rorqual found in the adjacent waters of Japan. Bull Jap Soc Sci Fish 4, 325-330   DOI
5 Melville GJ and Welsh AH. 2001. Line transect sampling in small regions. Biometrics 57, 1130-1137   DOI   ScienceOn
6 Park KJ, Kim ZG and Zhang CI. 2007. Abudance estimation of the finless porpoise, Neophocaena phocaenoides, using models of dection function in a line transect. J Kor Fish Soc 40, 201-209
7 Wada S, Kobayashi T and Numachi K. 1991. Genetic variability and differentiation of mitochondrial DNA in minke whales. Rep Int Whal Comm (Special issue 13), 203-216   DOI
8 Brownell RL Jr. 1981. Review of coastal whaling by the Republic of Korea. Paper SC/32/Ba6 presented to the IWC Scientific Committee
9 Efron B and Tibshirani RJ. 1993. An Introduction to the Bootstrap. Chapman and Hall, London, U.K.
10 Hiby AR and Hammond PS. 1989. Survey techniques for estimation numbers of cetaceans. Rep Int Whal Comm 11, 47-80, special Issue
11 Horwood J. 1990. Biology and Exploitation of the Minke Whale. CRC press. Florida. pp. 238
12 Gong Y and Hwang BN. 1984. Effort, catch and sightings data for the minke whale fishery in Korean waters. Rep Int Whal Comm 37, 281-284
13 Cooke JG. 1994. Simulation trial of the RMP catch limit algorithm in the presence of adverse external influences on whale populations. Rep Int Whal Comm 45, 113-115
14 Sohn H, Kim ZG and Miyashita T. 2001. Abundance estimate of minke whale, Balanoptera acutorostrata, by sighting survey in the Yellow Sea, spring 2001. J Kor Soc Fish Res 4, 51-63
15 Wada S. 1984. A note on the gene frequency differences between minke whales from Korean and Japandes coastal waters. Rep Int Whal Comm 34, 345-347
16 Kato H, Kishiro T, Fujise Y and Wada S. 1992. Morphology of minke whales in the Okhotsk Sea, Sea of Japan and off the east coast of Japan, with respect to stock identification. Rep Int Whal Comm 42, 437-442
17 IWC (International Whaling Commission). 2006. Chair's report of the Fifty-eight annual meeting. Rep Int Whal Comm 57, 46-50
18 Thomas L, Laake JL, Strindberg S, Marques FFC, Buckland ST, Borchers DL, Anderson DR, Burnham KP, Hedley SL, Pollard JH, Bishop JRB and Marques TA. 2005. Distance 5.0. Release 'x'1. Research Unit for Wildlife Population Assessment, University of St. Andrews, UK. http://www.ruwpa. stand.ac.uk/distance/
19 Chen SX. 1998. Measurement errors in line transect surveys. Biometrixs 54, 899-908   DOI   ScienceOn
20 Stuart A and Ord JK. 1987. Kendall's Advanced theory of Statistics, Vol. 1. Griffin, London. U.K.
21 Cooke JG. 1985. Notes on the estimation of whale density from line transects. Rep Int Whal Comm 35, 319-323
22 Jefferson TA, Webber MW and Pitman RL. 2007. Marine Mammals of the World: A comprehensive guide to their identification. Academic Press, London, U.K.
23 Burnham KP, Anderson DR and Laake JL. 1980. Estimation of density from line transect sampling of biological populations. Wildl Mon 72, 1-102
24 Fewster RM, Laake JL and Buckland ST. 2005. Line transect sampling in small and large regions. Biometrics 61, 856-861   DOI   ScienceOn