서해권역 패류 생산의 장기 (1970-2022년) 변화 및 생산성 향상에 관한 고찰

강희웅,박광재,이경미,김정현 한국패류학회 2024 The Korean Journal of Malacology Vol.40 No.1

This study aims to explore measures to continuously improve shellfish productivity in the West Sea coastal region (Incheon metropolitan city, Gyeonggi-do, Chungcheongnam-do, and Jeollabuk-do), which has a high proportion of aquaculture among domestic shellfish production areas. To analyze changes in shellfish production in the West Sea coastal region over 52 years, we compared changes in tidal flat area and production by fishery and species from 1970 to 2022 using data from the KOrean Statistical Information Service (KOSIS, 2023). As a result of the analysis, West Sea region over the past 10 years (2013-2022) was a total of 50,092 tons (28,997 tons of offshore fisheries, 21,095 tons of shallow-sea aquacultures), aquaculture ratio accounted for 40.4%. Shellfish production by fishery in the West Sea area for 52 years (1970-2022) includes 23 species of offshore fisheries, and the main species targeted for fishing include sunray surf clams, surf clam, oysters, and manila clam. There are 16 species of shallow-sea aquacultures, and the main species targeted for aquaculture include manila clam, oysters, surf clam, and venus clams. Changes in tidal flat area due to reclamation projects had a significant impact on the production of burrowing shellfish. Over the past 31 years (1987-2018), the change in the area of the West Coast tidal flat decreased 590 km2 from 1,935.4 km2 to 1,345.4 km2, showing a decrease rate of 30.5%, a high decrease compares to other regions across the country. In conclusion, it is believed that the way to continuously improve the productivity of shellfish is to protect natural seed and shell growth areas, selecting habitat suitability and suitable sites for each species, managing seed release, and expanding shellfish seed production and intermediate cultivation infrastructure.

서해산 박대, Cynoglossus semilaevis 암컷의 성숙과 산란

강희웅,강덕영,임한규,한현섭,도용현,박종순 한국발생생물학회 2012 발생과 생식 Vol.16 No.2

박대 생식소중량지수(gonadosomatic index, GSI)의 월간 변화는 2월에서 7월까지는 아주 낮은 값을 보였으나,8월부터 생식소가 급격히 발달하기 시작하여 9월에 최고값을 나타내었다. 이후 10월부터 점차 낮아져 11월에 다시 낮아지는 경향을 보였다. 비만도(condition factor, CF)의 월간 변화도 9월에 최대값을 보였다. 간중량지수(hepatosomatic index,HSI)의 월간 변화는 6월에 최대값을 보인 후 7월에 급격히 낮아져 최저값을 보인 후 9월부터 증가하기 시작하여 11월에최대값에 도달하였다. 난소발달은 미성숙기(2~7월), 초기 성숙기(7월 말), 성숙기(8월), 후기 성숙기(8월 말), 완숙․산란기(9~10월), 회복․휴지기(11월)의 6단계로 구분되었다. 박대의 포란수를 조사한 결과, 총 포란수(fecundity, F)와 전장(total length, TL)과의 관계는 F=251.43TL^(0.1264)(r^2=0.4027)이었으며, 총 포란수와 체중(body weight, BW)과의 관계는F=1130.4BW-880848(r^2=0.677)로 나타났다. 박대 암컷의 50%가 성숙하는 전장은 46.87 cm로 조사되었다

Jigsaw II 협동학습이 중학교 기술·가정 교과 '전기·전자 기술'단원에서 학업 성취도에 미치는 효과

강희웅,김진수 한국기술교육학회 2006 한국기술교육학회지 Vol.6 No.3

Arthrogryposis Multiplex Congenita의 1例

姜熙雄,洪性娟 金原出版 1970 小兒科 Vol.11 No.6

Ultrastructural studies of vitellogenesis in oocytes and follicle cells during oogenesis in female Protothaca (Notochione) jedoensis (Bivalvia: Veneridae)

강희웅,전제천,이기영,박관하,최기호 한국통합생물학회 2010 Animal cells and systems Vol.14 No.4

Ultrastructural studies of vitellogenesis in oocytes and follicle cells during oogenesis in female Protothaca (Notochione) jedoensis were investigated by histological and transmission electron microscope observations. In early vitellogenic oocytes, combined activities of the Golgi complex, mitochondria and rough endoplasmic reticulum in the cytoplasm are associated with autosynthetic vitellogenesis. Furthermore, at this time, many coated vesicles at the basal region of the oolemma of the oocyte lead to the formation of vesicles through endocytosis in the cytoplasm. Through the formation of the coated pits on oolemma during vitellogenesis, the uptake of extrafollicular precursors (nutritive materials) occurs in coated vesicles by endocytosis. Therefore, it is assumed that these exogenous materials are involved in heterosynthetic vitellogenesis. During late oogenesis, exogenous yolk precursors (yolk granules), lipid droplets and proteinaceous yolk granules are present in the cytoplasm of late vitellogenic oocytes. In mature oocytes,small yolk granules appear intermingled and form large mature yolk granules. Thus, two processes of vitellogenesis occur in oocytes by way of endogenous autosynthesis and exogenous heterosynthesis. The follicle cells attached to the oocytes appear to play an integral role in vitellogenesis in this study.

Ultrastructural studies of spermatogenesis and the functions of Leydig cells and Sertoli cells associated with spermatogenesis in Larimichthys polyactis (Teleostei, Perciformes, Sciaenidae)

강희웅,정의영,정재승,이기영 한국통합생물학회 2013 Animal cells and systems Vol.17 No.4

Ultrastructural studies of spermatogenesis and the functions of Leydig cells and Sertoli cells were investigated by electron microscope observation. Ultrastructural characteristics of spermatozoa of Larimichthys polyactis (Sciaenidae) have a round head, a nucleus containing highly compact filamentous clusters of chromatin, slightly eccentric nuclear fossa, no acrosome, a short midpiece with a short cytoplasmic channel, and a flagellum showing the classic axoneme structure (92) and short irregular flagellum lateral fins. The spermatozoon of this species (Sciaenidae) is Perciformes type II: the flagellar axis is parallel to the nucleus, the centriolar complex is outside the nuclear fossa, the proximal centriole is anterior and perpendicular to the distal centriole, and no more than five spherical mitochondria are observed. Each of the well-developed Leydig cells observed during the periods of active meiotic division and before spermiation contains an ovoid vesicular nucleus; a number of smooth endoplasmic reticulum, tubular, or vesicular mitochondrial cristae; and several lipid droplets within the cytoplasm. This indicates that Leydig cells, as typical steroidogenic cells showing several cytoplasmic characteristics, are involved in male steroidogenesis. However, no clear evidence of steroidogenesis or of any transfer of nutrients from the cells to spermatids that appears to be associated with phagocytic function in the seminiferous lobule was observed for Sertoli cells. These findings indicate that Sertoli cells of this species function in phagocytosis and the resorption of products originating from degenerating spermatids and spermatozoa following spermiation.

양식산 참조기, Larimichthys polyactis의 생식잠재력 및 자연산란을 통한 2, 3세대 수정란 생산 특성

강희웅,황인준,한종철 한국수산해양교육학회 2023 水産海洋敎育硏究 Vol.35 No.3

This study investigated the reproductive capacity of the 1st generation of cultured broodstock small yellow croaker, Larimichthys polyactis, and the characteristics of fertilized egg production through natural spawning of 2nd and 3rd generation broodstock. Matured ovaries for had a fair of asymmetric crystovarian structure. Cultured females broodstock grow faster than males at the same age, the relationship between body weight (BW) and total length (TL) of female was expressed as BW = 92.293TL0.1378 (r2=0.2324). The range for fecundity was 35,844~87,778 individuals (TL and BL of broodstock were 19.0~23.0 cm and 101.8~214.1 g, respectively) and gonadosomatic index (GSI) was 29.8~40.8. Natural spawning of cultured 2nd generation broodstock (3 years old) was maintained for 18~33 days by different supplied feed type (extruded pellet combine with shrimp, grounded fish feed (control) and moist pellet). The highest floating rate (27.3%) was observed in the moist pellet feed group, while spawning volume (2,728 mL) was found in the shrimp feed group. Natural spawning of cultured 3rd generation broodstock (2 years old) was maintained for 40 days, and the spawning volume (4,466 mL) and floating rate (67.0%) were improved compared to those of 2nd generation (3 years old). These results suggest that reproductive capacity of cultured small yellow croaker was better than that of wild stock and it was increased as the generation progresses with domestication.

인공생산된 참조기와 수조기 종묘의 성장

강희웅,조기채,김종화,강덕영,장인권,백상호 한국수산과학회 양식분과 2010 한국수산과학회 양식분과 학술대회 Vol.2010 No.6

양식산과 자연산 황복, Takifugu obscurus(Abe)의 식품학적 품질평가

강희웅,심길보,강덕영,조기채,송기철,이진호,송흥인,손상규,조영제 한국양식학회 2007 韓國養殖學會誌 Vol.20 No.3

서식지와 양식방법에 따른 큰가리비 (Patinopecten yessoensis) 의 영양성분 비교분석

강희웅,최진,송재희,정희도 한국패류학회 2019 The Korean Journal of Malacology Vol.35 No.2

This study compared that the nutrient composition of two domestic commercial Yesso scallop (Korea: Gangneung hanging culture, Pohang sowing culture) and one imported commercial Yesso scallop (Japan: Hokkaido sowing culture), which are distributed on the east coast of Korea, for increasing their value and efficient utilization. The crude lipid content of carcass was 0.11-0.32%, the lowest among the proximate composition. A total of 18 amino acids were identified, the glutamic acid was the highest content of 13.9-14.6% of the total amino acids. A total 27 free amino acids were identified, free glycine content was highest at 34.3-42.9% of the total free amino acids. Eicosapentaenoic acid (EPA, C20:5n-3) and docosapentaenoic acid (DHA, C22:6n-3) content of Gangneung hanging culture scallop were highest at 326.2 ± 38.04 mg/100 g and 195.7 ± 23.10 mg/100 g in total fatty acids of scallops, respectively. Vitamin B2, niacin, sodium, potassium and magnesium content were significantly affected by habitats. Based on these results, each nutrients composition was affected by habitats and culture method. However, all Yesso scallop used for analysis were low fat seafoods and considered to be high-quality food rich in EPA and DHA.