Sains Ma1aysiana 27: 19-29 (1998)                                                                                                               Sains Hayat/

                                                                                                                                                                                Life Sciences

Summer Mid-Day-Night Vertical Distribution of

Bosmina longirostris (Crustacea: Cladocera) and

Ceriodaphnia reticulata (Crustacea: Cladocera)         

in Lake Ikeda, Japan

Shaharudin Abdul Razak

Centre For Foundation Studies in Science

University of Malaya

50603 Kuala Lumpur, MALAYSIA

Toshio Saisho

Laboratory of Marine Biology

Faculty of Fisheries

Kagoshima University

Shimoarata4-50-20, Kagoshima City, Japan

ABSTRACT

Mid-day-night vertical distribution of Bosmina longirostris and Ceriodaphnia reticulata, two of the most common cladoceran species found in Lake Ikeda was analyzed during the summer of 1986. Monthly mid-day-night vertical distribution varied between both species. Although in general both species preferred to avoid the illuminated surface layer of water during the day they ascended to or near it at night. Between the two species, Ceriodaphnia reticulata was observed to be much more sensitive to light. During mid-day, it preferred to avoid illumination by staying in much deeper layers of water where light intensity was very much reduced. Bosmina longirostris on the other hand, although preferring to stay in deeper layers of water, a substantial population could still be observed in or near the surface water where none of the Ceriodaphnia reticulata could be found.

ABSTRAK

Taburan mencancang tengah-hari-malam Bosmina longirostris dan Ceriodaphnia reticulata, dua kladosera utama yang terdapat dalam Tasik Ikeda telah dianalisis pada musim panas 1986. Taburan mencancang tengah-hari-malam bulanan berbeza antara kedua-dua spesies. Walaupun secara umum kedua-dua spesies lebih cenderung untuk mengelak lapisan permukaan yang diterangi cahaya pada tengah-hari, tetapi naik pada atau berhampiran air pada tengah-malam, berbanding dengan Bosmina longirostris, Ceriodaphnia reticulata lebih sensitif kepada cahaya. Pada tengah-hari, Ceriodaphnia reticulata lebih cenderung untuk mengelak penerangan oleh cahaya dan memilih untuk mendiami bahagian air yang lebih dalam yang mempunyai kurang keamatan cahaya. Walaupun Bosmina longirostris memilih untuk tinggal pada bahagian air yang lebih dalam, masih terdapat sebahagian populasi yang tinggal pada atau berhampiran air permukaan yang tidak kedapatan Ceriodaphnia reticulata.

RUJUKAN/REFERENCES

Black, R.W. & Hairston Jr. N.G. 1984. Cyclomorphosis in Eubosmina longispina in a small North American pond. Hydrobiologia 102: 61-67.

Black, R.W. & Slobodkin L.B. 1987. What is cyclomorphosis? Freshwater. Biol. 18: 373-378.

De Stasio, J.r., Howard B.T.E., Hanson R. & Black R.W. 1990. Cyclomorphosis in Eubosmina species in New England lakes USA. Verh. Int. Ver. Limnol. 24: 481-486.

Harvell, C.D. 1990. The ecology and evolution of inducible defences. The Quart. Rev. Biol. 62: 323-340.

Havel, J.E. 1987. Predator-induced defences: A Review. In: Kerfoot W.C. & Sih A. (eds.), Predation, Direct and Indirect Impacts on Aquatic Communities. New Hampshire, New England Press,.

Hellsten, M.E & Stenson, J.A.E. 1995. Cyclomorphosis in a population of Bosmina. Hydrobiologia 312: 1-9.

Kerfoot, W.C 1975. Seasonal changes of Bosmina (Crustacea:Cladocera) in Frains Lake, Michigan: Laboratory observations of phenotypic changes induced by inorganic factors. Freshwater Biol. 5: 227-243.

Kerfoot, W.C 1980. Perspective on cyclomorphosis: separation of phenotypes and genotypes. In Kerfoot W.c. (Ed.), Evolution and Ecology of Zooplankton Communities., Hanover, N.H, New England Press.: 470-496.

Kerfoot. W.C. & Peterson C. 1980. Predatory copepods and Bosmina: replacement cycles and further influences of predation upon prey reproduction. Ecology 61: 417-431.

McQueen, D.J. 1969. Reduction of zooplankton standing stocks by predaceous Cyclops Bicuspidatus thomasi in Marion Lake, British Columbia. J. Fish Res. Board Can. 26: 1605-1618.

Miyakita, D. 1928. Report on benthos research in the littoral zone of Kyushu area. Jap. J. Res. Fish. 23(4): 132-140. (In Japanese).

Mizuno, T. 1963. Research on the crater-lake of Kirishima and the limnology of Satsuma Lake. Jap. J. Limnol. 24(1-2); 22-23. (In Japanese).

Murayama, S. & Saisho T. 1967a. Seasonal variations of plankton at Lake Ikeda. Mem. Fac. Fish., Kagoshima Univ. 16:29-33. (In Japanese).

Razak, S.A. & Saisho T. 1997a. Seasonal Succession in the main cladoceran assemblage of a crater lake in Japan. Jur. Sains: In Press.  

Razak, S.A. & Saisho T. 1997b. Summer Mid-Day-Night composition and abundance          of the main zooplankton assemblage of a crater lake from Kyushu Island, Japan. Pertanika J. Trop. Agri. Sci.; In Press.

Razak, S.A., Yoshimine & Saisho T. 1997. Seasonal Diel Vertical Migration of the main cladoceran assemblage of a crater lake in Lake Ikeda, Japan. Jur. Sains: In Press.

Sternberger, R.S. 1998. Reproductive costs and hydrodynamic benefits of chemically induced defences in Keratella testudo. Limnol. Oceanogr. 33: 593-606.

Sternberger, R.S. & Gilbert, J.J. 1987. Defences of planktonic rotifers against predators. In Kerfoot W.C. & Sih A. (Eds.) Predation; Direct and Indirect Impacts on Aquatic Communities., New Hampshire, New England Press.

Stenson, J.A.E. 1985. Strategies for Prey-Selection and Anti-Predator Defence in Lake Ecosystem. Reprinted from Institute of Freshwater Research, Drottningholm 62: 150-160.

Stenson, J.A.E. 1987. Variation in capsule size of Holopedium gibberum (Zaddach); A response to invertebrate predation. Ecology 68: 928-934.

Yoshimura, S. 1930. Scientific biological research on a crater-lake in Southern Kyushu. Jap. J. Geology. 42: 381-665. (In Japanese).