open access
메뉴
open access
메뉴
ISSN : 1225-3480
The incubation time required for hatching of O. ocellatus were investigated through the processes of egg and embryonic developments by the dissecting microscopic and visual observations. And differences in ecological characteristics of the plankton mode of life or the benthic mode of life according to total numbers of the suckers on each short arm of the hatched juvenile larvae of O. ocellatus were studied by comparisons with other octopodidae species. Compared with the recent a few results reported by other researchers associated with the incubation time required for hatching by female adult mother of O. minor (73-90 days after spawning at 20.9-21.5℃ ranges), in this study, the incubation time required for hatching by female adult mother of O. ocellatus was 56-57 days after spawning at 11.0-20.4℃. Therefore, the incubation time required for hatching by female adult mother varied with Octopodidae species. In this studies, each ovarian egg laid by a female was connected to an egg string attaching to the surface of the wall or bottom of vacunt shell of Rapana venosa. Egg and embryonic developments of this species were studied in the indoor aquaria, in the specific gravity ranging 1.024-1.025. the hatched juvenile of O. ocellatus is 10.3 mm in the mean total length and 4.5 mm in mantle length, and each of its short arms has 18-20 suckers. The just hatched juvenile larvae of O. ocellatus enter the benthic mode of life (benthic larval stage) after hatching. In particular, regarding differences in ecological characteristics of the mode of life according to total numbers of the suckers, O. vulgaris may not need to have many suckers because they enter the planktonic mode of life after hatching, however O. ocellatus may need to have many suckers, because they should adapt to the benthic mode of life. And also the just hatched juvenile larvae of O. minor (bearing many suckers more than O. ocellatus) enter the benthic mode of life (benthic larval stage) after hatching. Therefore, the total number of the suckers on each short arm of the hatched juvenile larvae can be used for determining whether an octopus species has planktonic larval stages or benthic larval stage (benthic mode of life). In particular, The intracohort cannibalism phenomena appeared at the hatched juvenile larval stage because the larval stage of O. ocellatus and O. minor enter into the benthic larval stage in the early stage, unlike entering into the plaktonic larval stage in other Octopus species such as O. vulgaris: at this time, the early hatched larvae fed the late hatched larvae (they are the same species and almost same ages). Therefore, the intracohort cannibalism pheneomena occur in the just hatched juvenile stage of only O. ocellatus and O. minor.
Andrews. P.L.R. & Tansey, E.M. (1983) The digestive tract of Octopus vulgaris: The anatomy. physiology and pharmacology of the upper tract. Marine Biology, 63: 109-134.
Aronson, R.B. (1991) Ecology paleobiology and evolutionary constraint in the Octopus. Bulletin of Marine Science, 49(1-2): 245-255.
Bairati, A. ˑ Comazzi, M. and Gioria, M. (1995) A comparative microscopic and ultrastructural study of perichondrial tissue in cartilage of Octopus vulgaris (Cephalopoda: Mollusca). Tissue and Cells, 27(5):515-523.
Boletzky, S. V.(1976) Quelques observations sur pteroctoplus tetracirrhus (Mollusca, Cephalopoda). Raport Comm In Mer Mdit., 23(8): 95-102.
Boletzky, S.V. (1977) Pos-hatching behaviour and mode of life in Cephalopods. Symposium Zoological Socierty, London, 38: 557-567.
Boletzky, S.V. and Hanlon, R.T. (1983) A review of the laboratory maintenance, rearing and culture of Cephalopod Molluscs. Memorial National Museum, Victoria, 44: 147-187.
Boyle, P.R. and Knobloch, D. (1982) On growth of the Octopus eledone cirrhosa. Journal of Marine Biology Association, U.K. 62(2): 277-296.
Boyle, P.R. and Knobloch, D. (1983) The female reproductive cycle of the Octopus Eledane cirrhosa. Marine Biology Association, 63(1): 71-83.
Che, Y.J., Ueng, Y.E. and Chow, C.J. (1992)Comparative study on the characteristics of cephaloped mantle muscle for surimibased products processing. Journal of Fisheries Society. Taiwan, 19(1): 75-82.
Choe, B.L., Park, M.S. Jeon, L.G., Park, S.R. and Kim, H.T. (1999) Commercial molluscs from the freshwater and continental shell in Korea. National Fisheries Research Development and Institute, 197pp.
Chu., C. and Kim, S.G. (1990) Studies on the development of Techniques on seedling production of Octopus vulgaris. Report of National Fisheries Reserch and Development Institute, 86: 92-97 (in Korean).
Chung, E.Y., Kim, J.B. and Kim, B.G. (2004) Changes in biochemical components of the ovary and the trunk tissues including the digestive organ Associated with gonadal development of the female Octopus ocellatus. Korean Journal of Malacology, 20: 55-63.
Cortez, T.B., Castro, G. and Guerra, A. (1995)Reproduction and condition of female Octopus mimus (Mollusca : Cephalopoda). Marine Biology, 123(3):505-510.
Forsythe, J.W. and Hanlon, R.T. (1988) Effect of temperature on laboratory growth, reproduction and life span of Octopus bimaculoides. Marine Biology, 98(3): 369-379.
Gabe, S. (1975) Reproduction in giant octopus of the North Pacific, Octopus dofleini martini, Veliger,18(2):146-50.
ltami, K.. Izawa, Y.S., Maeda, S. and Nakai, K. (1963)Notes on the laboratory culture of the octopus larvae. Buletin of Japanese Society Fisheries, 29(6):514-519.
Kim, B.G., Kim, S.W., Jun, J.C. and Kim, J.S. (1997)Studies on the development of Techniques on seedling production of Octopus ocellatus. Report of West Sea Fisheries Search Institute National Fisheries Research and Development Institute, 297-304.
Kim, B.G. (2003). Reproductive ecology and seedling production of the octopus, Octopus ocellatus on the west coast of Korea. Ph. D. Thesis, Kunsan National University, Korea. 102 pp.
Kim, D.S.(2004). Studies on reproductive ecology, growth and variation of local populations of Octopus minor. Ph. D. Thesis, Mokpo National. University, Korea. 172pp.
Kume, M.S. and Tan, G.M. (1984) Invertebrate embryology. Baihukan, Tokyo, 521pp.
Kwon, O.K., Park G.M. and Lee, J.S. (1993) Coloured shells of Korea. Academy Publishing Co. Seoul, 288pp.
Lee, B.D. (1956) The catalogue of molluscan shells of Korea. Bulletin of Pusun Fisheries ColIedge, 1(1):1-48.
Mangold, K. (1990) Octopus vulgaris, In: Cephalopod Life Cycle, l. Ed. by P. R. Boyle, 21: 335-364.
Mcquaid, C.D. (1994) Feeding behaviour and selection of bivalve prey by Octopus vulgaris Cuvier. Journal of Experimental Marine Biology and Ecology, 177(2):187-202.
Min, D.K., Lee, J.S., Ko, D.B. and Je, J.G. (2004)Mollusks in Korea. Hanguel Graphics, Busan, Korea 566pp.
Moltschaniwskyj, N.A. and Doherty, P.J. (1995)Cross-shelf distribution patterns of tropical juvenile cephalopods sampled with light-traps. Marine Freshwater Research, 46(4): 707-714.
Nixon, M. and Mangold, K. (1996). The early life of Octopus vulgaris (Cephalopoda : Octopodidae) in the plankton and at settlement: A change in lifestyle. Journal of Zoology, 239(2): 301~327.
Perez, J.A.A. and Haimovici, M. (1991) Sexual maturation and reproductive cycle of Eledone massyae Voss, (1964) (Cephalopoda: Octopodidae) in Southern Brazil. Bulletin of Marine Science, 49(1-2), 270~279.
Smale, M.J and Buchan, P.R. (1981) Biology of Octopus vulgaris off the Coast of South Africa. Marine Biology, 65: 1-12.
Takashi, O. (1984a). Systematics and life history of benthic octopoda (1) Taxonomic characters of Octopodidae. Octopodidae, 6(4): 257-263 (in Japanese).
Takashi, O.(1984b). Systematics and life history of benthic octopoda (2) Ecology of Octopodidae. Octopodidae, 6(5): 330-335 (in Japanese).
Taki, I. (1941) On keeping octopods in an aquarium for physiological experiments with remarks on some operative techniques. Venus, 10: 139-156.
ViIlanueva, R. (1995). Experimental rearing and growth of planktonic Octopus vulgaris from hatching to settlement. Canadian Journal of Fisheries, 52(12):2639-2650.