Gametogenesis, Mating Behaviour and Spawning of Octopus ocellatus (Cephalopoda: Octopodidae) in Western Korea

다국어 초록 (Multilingual Abstract)

Gametogenesis, mating behaviour, spawning behaviour, and estimated longevity of Octopus ocellatus were investigated by histological study. This species is dioecious, and showed a protandry phenomenon. Ooogenesis (in females) and spermatogenesis (in males) can be classified into 3 stages, respectively. O. ocellatus copulates in one of two ways: a male may leap upon a female, mounting her mantle, or a male may sit near the female and extend the hectocotylized third right arm toward her. Spawning occurred between April and June in females, and between March and May in males of O. ocellatus. The spawning period was once a year and the peak took place between May and June. A number of flatened follicle cells, which were attached to an oocyte, were involved in vitellogenesis in the cytoplasm of the vitellogenic oocyte (maturing oocyte), and formation of chorion membrane (secondary egg membrane) of the ovarian eggs. Fecundity per female closely related to GSI was 294-660 eggs (average, 429 eggs). The díameters of the ovarían eggs surrounded by chorion membrane were approximately ín the range of 10.10-2.50 mm. Each ovarian egg laid by a female was connected to an egg string. Each egg string was 1-5.5 cm (average 3.6 cm). The total number of eggs laid by a female of this species ranged 218-314, the egg sizes were independent to the size of female adult. this species has a life mode showing some special reproductive characteristics of an annual semelparity as shown in Octopodidae species because we have never seen a female spawning a second time.

참고문헌 (Reference)

1 Froesch, D., "The structure, function of the oviducal gland in octopods (Cephalopoda)" 188 : 95-101, 1975

2 Bottke. W., "The fine structure of the ovarian follicle of Alloteuthis subulata Lam. (Mollusca. Cephalopoda)" 150 : 463-479, 1974

3 Boyle, P. R., "The female reporductive cycle of the Octopus Eledane cirrhosa" 63 : 71-83, 1983

4 Nixon, M., "The early life of Octopus vulgaris (Cephalopoda: Octopodidae) in the plankton, at settlement : A change in life style" 239 : 301-327, 1996

5 Andrews. P. L. R., "The digestive tract of Octopus vulgaris: The anatomy. physiology, pharmacology of the upper tract" 63 : 109-134, 1983

6 Lee, B. D., "The catalogue of molluscan shells of Korea" 1 : 1-48, 1956

7 Takashi, O., "Systematics, life history of benthic octopoda (2) ecology of octopodidae" 6 : 330-335, 1984

8 Takashi, O., "Systematics, life history of benthic octopoda (1) taxonomic characters of octopodidae" 6 : 257-263, 1984

9 Chu. C., "Studies on the development of Techniques on seedling production of Octopus vulgaris" 86 : 92-97, 1990

10 B.G., Kim, "Studies on the development of Techniques on seedling production of Octopus ocellatus" West Sea Fisheries Research Institute, National Fisheries Research, Development Institute 297-304, 1997

11 Huebner, E., "Structural, functional dynamics of oogenesis in Glossina austeni : Vitellogenesis with special reference to the follicular epithelium" 7 : 535-558, 1975

12 Perez, J. A. A., "Sexual maturation, reproductive cycle of Eledone massyae, voss 1964 (Cephalopoda : Octopodidae) in Southem Brazil" 49 : 270-279, 1991

13 Wells, M. J., "Sexual display, mating of Octopus vulgaris Cuvier, O. cyanea Gray, attempts to alter the performance by manipulating the glandular condition of the animals" 20 : 293-308, 1972

14 Cortez, T. B., "Reproduction, condition of female Octopus mimus (Mollusca : cephalopoda)" 123 : 505-510, 1995

15 Gabe, S., "Reproduction in giant octopus of the North Pacific, Octopus dofleini martini" 18 : 146-150, 1975

16 Buckley, S. K. L., "Oogenesis, it's hormonal control in Octopus vulgaris" University of Cambridge 1976

17 Taki, I., "On keeping octopods in an aquarium for physiological experiments with remarks on some operative techniques" 10 : 139-156, 1941

18 Boyle, P. R., "On growth of the Octopus Eledone cirrhosa" 62 : 277-296, 1982

19 Woods, J., "Octopus-watching off Capri" 7 : 324-327, 1965

20 Min, D. K., "Mollusks in Korea" Hanguel Graphics 566-, 2004

21 Galangau, V., "Les mitochondries pendant la spermatogenese d'Octopusvulgaris L. C.r" 267 : 1735-1737, 1968

22 Galangau, V., "L'acrosome d'Octopus vulgaris L. Observations au microscope electronique" 267 : 1462-1464, 1968

23 Bast, R. E., "Follicle cell protein synthesis, its contribution to the yolk of thc cecropia moth oocyte" 52 : 83-97, 1976

24 Mcquaid, C. D., "Feeding behaviour, selection of bivalve prey by Octopus vulgaris cuper" 177 : 187-202, 1994

25 ViIlanueva, R., "Experimental rearing, growth of planktonic Octopus vulgaris from hatching to settlement" 52 : 2639-2650, 1995

26 Forsythe, J. W., "Effect of temperature onlaboratory growth, reproduction, life span of Octopus bimaculoides" 98 : 369-379, 1988

27 Aronson, R. B., "Ecology paleobiology, evolutionary constraint in the Octopus" 49 : 245-255, 1991

28 Moltschaniwskyj, N. A., "Cross-shelf distribution patterns of tropical juvenile cephalopods sampled with light-traps" 46 : 707-714, 1995

29 Che, Y. J., "Comparative study on the characteristics of cephaloped mantle muscle for surimibased products processing" 19 : 75-82, 1992

30 Mangold, K., "Cephalopod Life Cycle l. Ed. by Boyle, P.R. 21" 335-364 335-364, 1990

31 Hanlon, R. T., "Ceephalopod behaviour" Cambridge University Press 232-, 1996

32 Smale, MJ., "Biology of Octopus vulgaris off the Coast of South Africa" 65 : 1-12, 1981

33 Richard, A., "Analyse du cycle sexuel chez les Cephalopodes: Mise en evidence experimentale d’une rythme conditionnee par les variations des facteurs externes et intenes" 95 : 461-469, 1970

34 Selman, K., "An ultrastructural, cytochemical, analysis of oogenesis in the squid, Loli해 pealei" 152 : 381-388, 1977

35 Bairati, A., "A comparative microscopic, ultrastructural study of perichondrial tissue in cartilage of Octopus vulgaris (Cephalopoda, Mollusca)" 27 : 515-523, 1995