• Journal of Food Hygiene and Safety
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• v.19 no.4
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• pp.203-208
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• 2004

The shells of Anadarac tegillarca granosa, Crassostrea gigas, Crassostrea nippona, and Patinopecten yessoensis were used for preparation of calcium carbonate with high purity. Calcium content in ash of shell was the highest $64.9\%$ in Anadarac tegillarca granosa ashed for 5 hr at $900^{\circ}C$, and followed as Patinopecten yessoensis $62.5\%$, Crassostrea gigas $62.4\%$, and Crassostrea nippona $61.5\%$. Whiteness of ash was the highest 81.6-85.8 in Patinopecten yessoensis shell. Calcium contents in calcium carbonates made with shells of Anadarac tegillarca granosa by using ammonium chloride process (ACP) and ammonium nitrate process (ANP) were higher $40.03-40.04\%$ than $39.92\%$ in Anadarac tegillarca granosa ash. Calcium content was the highest $40.04\%$ in pH adjusted calcium carbonate prepared by using ANP. Whiteness of calcium carbonate prepared by using ACP and ANP was the level of 101.0-101.5. Therefore, we estimated that the calcium carbonate made by using ACP and ANP could be used potentiality as a food additive for calcium supplement.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.35 no.5
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• pp.485-489
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• 2002

To investigate the effects of the dissolved oxygen concentration (DO) of Tetillarca granosa (Linnaeus), We measured $LC_{50}$, survival, oxygen consumption rate, filtration rates and blood composition under $10{\cdot}{\pm}0.5^{\circ}C$ and $25{\cdot}0.5^{\circ}C$ as a function of DO. The 16 days-$LC_{50}$ of DO for T. granosa was 1.31 mg DO/L in large individual and 0.95 mg DO/L in small individual. At 25$^{\circ}C$, the $LC_{50}$ of DO in large and small individual was 1.13 and 1.M mg DO/L, respectively. With decreasing DO, oxygen consumption rate, and filtration rates of T. granosa decreased. Blood composition of T. granosa was analysed hemoglobin, glucose, total protein, total cholesterol, GOT and GPT, Hg was increased with decreasing DO, but glucose was decreased below 1.2 mg DO/L. Total protein, total cholesterol, GOT and GPT were investigated irregular and decreasing aspect.

• Journal of Fisheries and Marine Sciences Education
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• v.28 no.5
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• pp.1435-1443
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• 2016

This study evaluated the sanitary state of seawater and shellfish in Yeoja bay from January 2014 to June 2016. The sampling stations for sanitary survey in Yeoja Bay was composed of 50 stations for seawater and 4 stations for ark shell and the samples have been collected monthly at a stated date. The total and fecal coliforms in seawater and Escherichia coli (E. coli) in shellfish were investigated as sanitary indicator bacteria, respectively. The geometric mean and the estimated 90th percentile ranges of total and fecal coliforms for seawater were <1.8-3.9, <1.8-2.6 and <1.8-29.7, <1.8-9.3 MPN/100 mL, respectively. The range of E. coli levels for ark shell were <20~330 MPN/100 g. The sanitary state in Yeoja bay was evaluated clean area according Korea criteria and conditionally approved area according US criteria and Class B area according EU criteria.

• The Korean Journal of Malacology
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• v.26 no.3
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• pp.201-209
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• 2010

The investigated of survival rate, sex ratio, condition index, gonad development frequency, gonad index, fertilization rate, hatching rate and time required development of D shape larvae of the ark shell, Scapharca subcrenata. Survival rate was lower in heating group compared with control group (P < 0.05). Sex ratio (female:male) observed 1:0.97 in control group, 1:0.62 in heating group. Condition index was significantly higher in heating group than control group (P < 0.05) and higher increased more than water temperature $17^{\circ}C$ of heating group. Gonad development observed slow in control group but more than ripe stage 80% in heating group (21-28 day, $20^{\circ}C$). Gonad index was higher in heating group compared with control group (P < 0.05). Fertilization rate and hatching rate of the ark shell was observed $82.17{\pm}3.55%$ and $63.57{\pm}2.36%$, respectively. The time required development of D shape larvae of the ark shell was observed 15 hour after fertilization. The suggested that results of the ark shell by heating were effective sex maturation and normal egg development.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.7
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• pp.299-309
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• 2019

This study was designed to assess the quality and quantity of food resources such as the chlorophyll a concentration (Chl-a), the particulate organic carbon (POC) and the particulate organic nitrogen (PON), on blood cocke (Tegillarca granosa Linnaeus) farms from May to November 2017 in the northwestern area of Yeoja Bay, Korea. The values of Chl-a, POC and PON were $1.69-7.68{\mu}g{\cdot}L^{-1}$ (average: $3.48{\mu}g{\cdot}L^{-1}$ in the surface), 0.88-2.58 mM (average: 1.97 mM) and 0.17-0.90 mM (average: 0.54 mM), respectively, and these values were higher in the spring and summer and lower in the autumn. Furthermore, Chl-a and POC had higher values on the bottom layer than those vales on the surface, while PON had higher values on the surface than those values on the bottom. The POC/PON ratio and POC/Chl-a ratio were 1.56-7.88 (average: 3.71 on the surface of the water) and 216-967 (average: 700 on the bottom of the water), respectively, with most of the carbon sources being sediment-accumulated particle organic matter, and the contribution by phytoplankton was assessed as being low. These results show that the food source of the blood cockle farms in the northwest area of Yeoja Bay seems to be abundant in quantity, but this is considered to be very poor in quality.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.246-247
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• 2000

수서동물 생식소의 해부학적 구조 및 생식세포의 미세구조는 종 특이성, 생식생태 및 계통에 따라 다르다. 일반적으로 이매패류의 정자는 각 분류군에 따라 핵과 첨체의 모양, 첨체의 axial rod, 미토콘드리아 수, 편모의 수 및 형태 등에서 다양한 특징을 보인다 (Morse and Zardus, 1997). Anadara trapez 등이 속하는 돌조개과 (Arcidae) 패류들의 정자 두부는 난형이며, 첨채에 axial rod가 없고, 중편에 4개의 미토콘드리아를 가진다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.248-249
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• 2000

연안 및 조간대에 서식하고 있는 해산 무척추동물들은 수시로 염분변화에 노출되고 있으므로, 저염분에 노출되고 있는 시간은 생존하기 위하여 수행하는 생리적 조정의 결과로서 성장률 감소를 수반하는 스트레스의 중요한 요인이다. 또한 염분은 해산과 기수지역 생물의 생리적 과정에 영향을 미치며, 종의 분포를 결정 짓는 주요한 환경 요인 중 하나이며, 염분변화에 의해 패류에서 발생하는 전형적인 반응은 섭이활동의 저하, 성장률의 감소와 패각의 폐쇄 등이다(Bohle, 1972; Widdows, 1985). (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.339-340
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• 2001

이매패류의 의투막은 외부의 자극에 생물학적으로 처음 반응하는 기관계로서 자극을 외투강 기관계와 내장 기관계에 전달함과 동시에 외투강내의 모든 기관계를 이차적으로 보호하는 구조이다. 이매패류의 외투막은 자극수용, 외투강내 물질수송 및 패각형성 등 중요 기능을 가지고 있다 (Neff, 1972b; Wilbur, 1972, 1985; Machin,1977; Crrenshaw, 1980). 이매패류 외투막의 구조에 관해서는 Lyonsiidae의 일부 종(Prezant, 1981)과 Crassostrea (Morrison, 1993)등에 관한 일부 보고가 있을 뿐이다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.343-344
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• 2001

패류의 운동기관 가운데 하나인 발은 그들의 서식생래 및 잠입성 여부에 따라 형태와 부속기관에서 다양한 차이를 보인다. 하지만 이매패류의 발에 관한 연구는 주로 유생시기의 족사 형성 및 변화 그리고 성체의 근육구조에 관하여 수행되어져왔다 (Yonge, 1962; Lane and Nott, 1975). 그러나 조간대 갯벌 잠입성 패류의 경우에는 발의 근육구조에 관한 정보보다는 상피층의 점액분비세포 등 부속기구에 관한 정보가 필요한 실정이다. (중략)

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.10a
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• pp.341-342
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• 2001

이매패류의 아가미는 호흡기능과 함께 점액분비 및 섬모운동 등을 통하여 먹이의 포획, 수송, 소화 기능을 동시에 수행하며 (Beninger et al., 1988). 외부의 물리ㆍ화학적 자극에 빠르게 반응하는 중요한 외투강 기관계이다. 따라서 이매패류 아가미의 구조, 점액분비세포와 섬모운동의 특성은 서식생태와 섭이생태에 따라 다양하므로 이들 아가미에 관한 연구는 주로 다양한 측면의 환경변화 및 섭이생태와 연관하여 수행되어져 왔다. (중략)