• Animal Systematics, Evolution and Diversity
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• v.7 no.1
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• pp.1-12
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• 1991

Two new poecilostomatoid copepods , Leptinogaster digita n.sp. and Hermannella soleni n.sp., parasitic in a bivalve Solen grandis Dunker , are described from the Yellow Sea coast of southwest Korea.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.591-592
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• 2001

대만조개, Solen grandis (Dunker)는 죽합과 Solenidae에 속하는 이매폐로써 우리나라 서ㆍ남해안이 주산지로 친해의 사니질에 서식하며(유 1976), 자원보존과 증량식 기술개발이 기대되는 산업상 중요한 종이다. 일본산 맛조개에 관한 연구로는 맛조개의 부유자패 및 치패(吉田, 1939, 1953), 생활사, 생식주기, (河原ㆍ加藤, 1971)등의 보고가 있을뿐이며, 우리나라 맛조개류의 생식생태에 관한 보고는 맛조개와 붉은맛의 생식연주기(정 등, 1986)와 대맛조개의 정자형성과정의 미세구적 연구 (정ㆍ박, 1998)가 보고되어 있을 뿐이다. (중략)

• Development and Reproduction
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• v.2 no.1
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• pp.101-109
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• 1998

Spermatogenesis and reproductive cycle of the razor clam, solen grandis, were investigated monthly by histological and cytological observations. Samples were collected from natural intertidal population at Oshik-do, Kunsan, Korea, for one year, beginning from January to December, 1993. solen grandis is dioecious. Morphological structures of the spermatozoon of this species ar esimilar to those of other bivalve spermatozoa having a primitive type; i.e., a small head, a cap-shaped acrosome and a short mid-piece with four mitochondria surrounding axial filament. The head of spermatozoon is approximately 2 \mu m in length and sperm tail is about 20 \mu m long. The axoneme of tail flagellum consists of nine pairs of peripheral microtubules at the periphery and a pair of central microtubules at the center. Four spherical mitochondria form the paranucleus. Spawning occures once a year between early June and July, and the main spawning was observed in July when seawater temperature reaches above 20 \circ C. The reproductive cycle of male razor clam can be divieded into fivesuccessive stages; early active (December to january), late active (January to march), mature (March to early August), partially spawned (June to July), and spent/inactive stage (August to December).

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2002.05a
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• pp.620-622
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• 2002

• Proceedings of the Malacological Society of Korea Conference
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• 2002.05a
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• pp.6-8
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• 2002

• The Korean Journal of Malacology
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• v.22 no.1 s.35
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• pp.27-38
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• 2006

We investigated the reproductive cycle with gonad developmental phases of Solen grandis by histological observations. Seasonal changes in biochemical components of the adductor muscle, visceral mass, foot muscle and mantle were studied by biochemical analysis, from January to December, 2005. The reproductive cycle of this species can be classified into five successive stages: early active stage (December to January), late active stage (January to March), ripe stage (March to July), partially spawned stage (June to July) and spent/inactive stage (July to December). Total protein content was the highest in the foot muscle, the content was high in January (early active stage), the lowest in April (ripe stage), and was the highest in August (partially spawned stage). In the visceral mass, total protein content began to increase in February (late active stage) and reached a maximum in March (ripe stage). Thereafter, it gradually decreased between June and July (partially spawned stage). There was a strong negative correlation in total protein contents between visceral mass and mantle (r = -0.594, p = 0.042). Meanwhile there was a positive correlation between the adductor muscle and foot muscle, the correlation was not statistically significant (r = 0.507, p = 0.093). Total lipid content was the highest in the visceral mass; it was more than 2 to 5-fold higher than that in the adductor muscle, foot muscle, and mantle. Monthly changes in total lipid content were also most dynamic in the visceral mass. It was relatively higher between January and February, showed a maximum in March (the ripe stage), decreased rapidly from April to July (ripe and partially spawned stage), and gradually decreased from September to December (spent/inactive stage). There was a strong positive correlation in total lipid content between foot muscle and adductor muscle (r = 0.639, p = 0.025). Tthough a negative correlation was found between visceral mass and mantle (r = -0.392), the correlation was not statistically significant (p = 0.208). Glycogen contents changed within relatively narrow range and were similar among different tissues. There was no statistically significant correlation in glycogen contents among tissues.