Park et al.: Larval development of Pandalopsis dispor 



125 



dicators of shifts in marine communities in this region. 

 Orensanz et al. (1998) have suggested it is important to 

 recognize that crustacean stocks can have multiscale 

 spatial structures; species have possibly both widely dis- 

 tributed populations (such as in the oceanic offshore) and 

 populations with discrete and localized distributions (as 

 may occur in the nearshore inlets). 



The ability to distinguish the larval stages of Pandalopsis 

 dispar from routine plankton samples is therefore of use 

 in studying both these problems of population fluctuations 

 and population distributions. Early identification of trends 

 in strong versus weak year classes can provide rapid indica- 

 tions of possible changes in large-scale climate conditions. 

 Unambiguous identification of planktonic stages of P. dis- 

 par is also essential for studies of the spatial structure of its 

 populations, for studies of transport pathways and potential 

 mixing rates among populations, and ultimately for under- 

 standing the metapopulation structure of these populations. 

 This latter point is critical for the development of improved 

 management approaches, which may include identification 

 of reproductive refugia (Orensanz et al., 1998). 



Acknowledgments 



We wish to thank Jim Boutillier and Steve Head for their 

 support with this study. This study was supported by 

 the Korea Research Foundation Grant (KRF-2002-013- 

 H00005). 



Literature cited 



Anderson, P. J. 



2000. Pandalid shrimp as indicators of ecosystem regime 

 shift. J. Northw. Atl. Fish. Sci. 27:1-10. 



Baba, K., K. Hayashi, and M. Toriyama. 



1986. Decapod crustaceans from continental shelf and slope 

 around Japan, 336 p. Japan Fisheries Resource Conserva- 

 tion Association, Tosho Printing Co. Ltd., Tokyo. 

 Berkeley, A. 



1930. The post-embryonic development of the common pan- 

 dalids of British Columbia. Cont. Can. Bio. Fish., New 

 Series 6:79-163. 

 Butler, T H. 



1980. Shrimps of the Pacific coast of Canada. Can. Bull. 

 Fish. Aquat. Sci. 202, 280 p. 

 Hanamura. Y., H. Khono. and H. Sakai. 



2000. A new species of the deepwater pandalid shrimp of the 

 genus Pandalopsis (Crustacea: Decapoda: Pandalidae) from 

 the Kuril Islands, North Pacific. Crust. Res. 29:27-34. 

 Haynes, E. 



1980. Larval morphology of Pandalus tridens and summary 

 of the principal morphological characteristics of North 

 Pacific pandalid shrimp larvae. Fish. Bull. 77:625-640. 

 Haynes, E. 



1985. Morphological development, identification, and biol- 

 ogy of larvae of Pandalidae, Hippolytidae and Crangoni- 

 dae (Crustacea: Decapoda) of the northern North Pacific 

 Ocean. Fish. Bull. 83:253-288. 

 Holthuis, L. B. 



1980. Shrimps and prawns of the world, an annotated 

 catalogue of species of interest to fisheries. FAO species 

 Catalogue. FAO Fish. Syn. 125, FIR/S 125 Vol.1, 271 p. 

 Jensen, G. C. 



1998. A new species of the genus Pandalopsis (Decapoda: 

 Caridea: Pandalidae) from the Eastern Pacific, with notes 

 on its natural history. Species Diversity 3:81-88. 

 Komai. T. 



1994. Deep-sea shrimps of the genus Pandalopsis (Decap- 

 oda: Caridea: Pandalidae) from the Pacific Coast of eastern 

 Hokkaido, Japan with the description of two new species. 

 J. Crust. Biol. 14:538-559. 

 Komai, T, and T. Mizushima. 



1993. Advanced larval development of Pandalopsis japonica 



