• 한국수산과학회지
• /
• 제37권6호
• /
• pp.462-468
• /
• 2004

In order to evaluate adaptation to the environment in released fish, digestive organ and body composition were compared among 1-year old cultured (CUL), released (REL) and wild (WIL) Black Sea Bream, Acanthopagrus schlegeli. Hepatosomatic index (HSI) of the REL was significantly lower than those of the CUL and WIL fish, but intestine weight index (IWI) of REL was significantly higher than those of the CUL and WIL fish. There were no significant differences in stomach weight index (SWI) and condition facto. (CF) among those different fish groups. The number of pyloric caeca of the REL and WIL fish were 4, but the $30{\%}$ of CUL fish was 3 counts. The moisture content of whole body in the WIL fish was significantly higher than the CUL and REL fish, but significant lowest in the crude lipid of whole body. The content of moisture and crude protein of dorsal muscle were no significant differences among the CUL, REL and WIL fish, but crude lipid content of WIL fish was significantly lower than the CUL and REL fish. Moisture content of CUL fish in the liver was significantly lower than the REL and WIL fish, and crude lipid was significant lowest in the WIL fish. Amino acid content of dorsal muscle in the WIL fish was highest in the total amino acid, EAA and E/A ratio, and CUL fish was highest EAA and E/A ratio in liver. EPA content in dorsal muscle of WIL fish was lower than CUL and REL fish, and the REL fish was highest in DHA content of the fatty acid. EPA content in liver of WIL fish was lower than CUL and REL fish, and DHA content in REL and WIL fish was highest and lowest. Crude protein content of CUL and WIL fish in the scale was significantly higher than REL fish, but there were no significant differences in contents of crude lipid and ash. Ca and P of scale were formed most of mineral and content of P in CUL fish was significantly higher than those of REL and WIL fish. There were no significant differences in Mg, K, Na and S of scale, but CUL fish was significantly lower than REL fish in C1. The results suggest that difference of digestive organs and body composition concluded it from differences of inhabitation environment and feed formulations.

• 한국어병학회지
• /
• 제14권1호
• /
• pp.21-30
• /
• 2001

1998년 3월부터 2000 4월까지 한국 남해안과 서해안에서 채집된 해산어 5종을 대상으로 어류의 위 및 장내에 기생하는 흡충류 종들을 형태학적 특징에 의해 분류 기재하였다. 본 실험을 위해서 사용된 어종은 조피볼락(Sebastes schlegeli), 쥐노래미(Hexagrammos otakii), 문절망둑(Acanthogobius flavimannus), 도다리(Pleuronichthys cornutus), 수조기(Nibea albiflora)의 5 어종으로, 그 중 4 어종은 금강하구입구 근처 고군산 군도에서 채집하였고, 쥐노래미는 고군산 군도와 완도에서 채집하였다. 흡충류 4종이 해산어류에서 검출되었다: 1)고군산 군도에서 채집된 조피볼락, 도다리, 쥐노래미의 위와 장에서 Opecoelus lobatus Ozaki, 1925가 검출되었고, 2)고군산 군도에서 채집된 문절망둑의 장내에서 Coitocoecum glandulosum Yamaguti, 1934 이 검출되었고, 3)고군산 군도에서 채집된 수조기의 장 내에서 Phyllodistomun sp. Braun, 1899 가 발견되었으며, 4)완도에서 어획된 쥐노래미의 위와 장에서 Pharyngora sp. Lebour, 1908 가 검출되었다. 해산 어류에서 검출된 4 종의 흡충류 중 3종(Opecoelus lobatus Ozaki, 1925, Phyllodistomun sp., Pharyngora sp.)은 국내에서 처음으로 발견된 종들이였다.

• 수산해양기술연구
• /
• 제34권3호
• /
• pp.320-327
• /
• 1998

1987년 2월부터 1988년 1월까지 낙동강 하구해역에서 채집된 전갱이(체장 4~15cm)의 식성을 조사하였다. 전갱이의 주요 먹이생물은 요각류(Copepoda), 단각류(Amphipods), 공쟁이류(Mysidacea)등의 갑각류였다. 특히 요각류가 위 내용물 중 차지하는 비율이 매우 높았다. 그 외에 십각류(Decapoda), 난바다공쟁이류(eEuphausiacea), 모악류(Chaetognatha), 갯지렁이류(Polycheata), 어란 및 자어 등이 위내용물 중 소량 발견되었다. 요각류 중에서는 Paracalanus parvus, Acartia clausi 그리고 Calanus sinicus 가 많이 섭이되었는데, 특히 C. sinicus에 대한 선호도가 높았다. 전갱이가 성장함에 따라 먹이생물의 조성이 점차 변하였다. 작은 전갱이들은 그들의 먹이를 요각류에 거의 전적으로 의존하였으나, 체장이 증가하면서 위내용물 중 요각류가 차지하는 비율은 점차 감소하였으며, 그 대신 비교적 큰 먹이생물인 단각류 및 곤쟁이류의 점유율은 점차 증가하였다.

• 한국양식학회지
• /
• 제17권3호
• /
• pp.215-220
• /
• 2004

돌돔, Oplegnathus fasciatus의 소화관은 식도, 위, 장 및 항문이 일련의 관을 이루고 있고,전체적으로 지방 덩어리가 싸고 있다. 어체 체장에 대한 식도에서 항문까지의 소화관 길이의 비(relative length of gut: RLG)는 일반적인 잡식성 어류와 비슷한 평균 1.78 (n=30)의 값을 가진다. 식도는 근육층이 잘 발달되어 있으며, 점막주름의 상피층은 입방상피 또는 원주상피로 구성되고 상피세포 사이에는 다수의 산성 점액분비세포들이 분포하며, 상피세포의 정단부에서 미세융모의 관찰은 어렵다. 위의 근육층은 외부로부터 종주근, 환상근층으로 구성된다. 위의 점막주름은 규칙적인 형태로서 상피층에는 pit, 상피 및 위선이 아주 잘 발달되어 있으며, 점막상피 세포질의 정단부에서는 영양분 흡수계통의 물질들이 관찰된다. 50∼60개의 유문수를 가지는 돌돔 유문수의 점막상피층에서는 원주형의 상피세포와 중성의 점액분비세포들이 관찰되며, 상피세포의 정단면에는 미세융모가 발달되어 있다. 장의 점막상피층에서는 원주상피세포와 중성과 산성의 점액분비세포들이 관찰되며, 종주근층의 두께가 전장, 중장, 후장으로 갈수록 두꺼워진다. 산성의 점액분비세포의 출현빈도는 중장부에서 가장 발달된 양상을 보이며 후장부로 갈수록 감소하는 경향을 보인다.

• 한국수산과학회지
• /
• 제55권5호
• /
• pp.714-720
• /
• 2022

A dietary comparison of yellow goosefish Lophius litulon in the South Sea and Yellow Sea was performed by analyzing stomach contents. Using a bottom trawl net from fisheries resources survey vessels of the National Institute of Fisheries Science, 326 individuals were collected from the South Sea and 166 individuals were collected from the Yellow Sea. The total length range of L. litulon was 5.3-68.4 cm for individuals collected from the South Sea and 7.5-55.1 cm for individuals collected from the Yellow Sea. Based on the index of relative importance and the variation in stomach contents by fish size, L. litulon was found to be a piscevore and a spatiotemporally opportunistic feeder fish that fed mainly on pisces. There were differences in the composition of the stomach contents by season, location, and the interaction between the season and the location. Thus, the diet of L. litulon is affected by the prey abundance and prey spectrum of the habitat.

• Asian Pacific Journal of Cancer Prevention
• /
• 제15권2호
• /
• pp.717-723
• /
• 2014

Background: This study was carried out to investigate the interaction of p53 codon 72 polymorphism, dietary and tobacco habits with reference to risk of stomach cancer in Mizoram, India. A total of 105 histologically confirmed stomach cancer cases and 210 age, sex and ethnicity matched healthy population controls were included in this study. Materials and Methods: The p53 codon 72 polymorphism was detected by PCR-RFLP and sequencing. H. pylori infection status was determined by ELISA. Information on various dietary and tobacco related habits was recorded with a standard questionnaire. Results: This study revealed that overall, the Pro/Pro genotype was significantly associated with a higher risk of stomach cancer (OR, 2.54; 95%CI, 1.01-6.40) as compared to the Arg/Arg genotype. In gender stratified analysis, the Pro/Pro genotype showed higher risk (OR, 7.50; 95%CI, 1.20-47.0) than the Arg/Arg genotype among females. Similarly, the Pro/Pro genotype demonstrated higher risk of stomach cancer (OR, 6.30; 95%CI, 1.41-28.2) among older people (>60 years). However, no such associations were observed in males and in individuals <60 years of age. Smoke dried fish and preserved meat (smoke dried/sun dried) consumers were at increased risk of stomach cancer (OR, 4.85; 95%CI, 1.91-12.3 and OR, 4.22; 95%CI, 1.46-12.2 respectively) as compared to non-consumers. Significant gene-environment interactions exist in terms of p53 codon 72 polymorphism and stomach cancer in Mizoram. Tobacco smokers with Pro/Pro and Arg/Pro genotypes were at higher risk of stomach cancer (OR, 16.2; 95%CI, 1.72-153.4 and OR, 9.45; 95%CI, 1.09-81.7 respectively) than the non-smokers Arg/Arg genotype carriers. The combination of tuibur user and Arg/Pro genotype also demonstrated an elevated risk association (OR, 4.76; 95%CI, 1.40-16.21). Conclusions: In conclusion, this study revealed that p53 codon 72 polymorphism and dietary and tobacco habit interactions influence stomach cancer development in Mizoram, India.

• 생태와환경
• /
• 제56권1호
• /
• pp.104-125
• /
• 2023

The predator-prey interaction in freshwater ecosystems is a crucial area in the ecological study field and one of example to find such interaction is to investigate stomach contents. However, traditional method through visual inspection often induce misidentification, as it depends critically on intactness of physically visible data. In this study, we utilized Next-Generations Sequencing (NGS) technology to test the applicability stomach content analysis and overcome such limitation. NGS was applied to analyze the stomach contents of the Hemibarbus labeo, Tachysurus fulvidraco, and Plecoglossus altivelis collected in the lower part of Nakdong River. As a result, T. fulvidraco had a higher number of Animalia operational taxonomic units (OTUs) intake rate than H. labeo. At the same time, P. altivelis had higher number of Plantae OTUs intake rate than T. fulvidraco and higher Protozoa OTUs intake rate than H. labeo respectively. Therefore, NGS technology application enable to overcome traditional method's limitation and discover hidden interspecific interaction which can further be used in appropriate habitat assessment.

• 한국어병학회지
• /
• 제5권2호
• /
• pp.61-75
• /
• 1992

틸라피아에 실험적으로 Edwardsiella tarda를 경구감염 시켰다. 틸라피아의 장을 자극시키지 않았을 때는 E. tarda가 감염되지 않았으나 과산화수소로 장을 자극시킨후 E. tarda를 투여하였더니 감염되었다. 150~200g되는 틸라피아 한마리에 $10^6CFU/m{\ell}$, $10^7CFU/m{\ell}$, $10^8CFU/m{\ell}$를 투여한 4일 후부터 죽은 실험어의 간장, 신장, 비장에 농창이 형성되었다. 또한 장관 장해부에서 세균이 증식되어 전신감염으로 급히 발병되어 죽은 예가 많았다. 자연감염어에서 볼 수 있는 증상이 나타났다.

• 한국수산과학회지
• /
• 제50권5호
• /
• pp.541-546
• /
• 2017

Feeding habits of dolphinfish Coryphaena hippurus, were analyzed. Fish samples were collected by using a purse seine, fishing and set net in the southern sea of Korea from January to December 2015. The size of C. hippurus ranged from 23.8 to 127.4 cm in fork length. The species with the highest percent index of relative importance (%IRI; the most important prey taxa) in the diets of C. hippurus were teleosts and cephalopod, including Engraulis japonicus, Thamnaconus modestus and Trachurus japonicus, Loligo edulis was the most frequently consumed cephalopods. Coryphaena hippurus also ate small amounts of amphipods and carid shrimp. The dietary compositions of C. hippurus was not significantly different among size classes or seasons (ANOSIM, P>0.05). As body size of C. hippurus increased the mean number of prey per stomach (mN/ST) tended to decrease, but the opposite trend was evident for mean weight of prey per stomach (mW/ST). The mN/ST and mW/ST also significantly varied with season (one-way ANOVA, P<0.05).

• 한국수산과학회지
• /
• 제52권6호
• /
• pp.740-744
• /
• 2019

Pacific white-sided dolphins Lagenorhynchus obliquidens inhabit cool temperate waters; in Korean waters, they concentrate near the coast of Gangwon and Gyeongbuk from late autumn to early spring. We collected 15 individuals from Yeongduk, Gyeongju, Ulsan, and Busan between December 2018 and February 2019 and analyzed their stomach contents. Fresh prey items were identified to the species level, and residual stomach contents that were unidentified due to digestion were filtered through a sieve to find fish otoliths and cephalopod beaks. The most important prey items of Pacific white-sided dolphins were cephalopods, composing 68.0% of the diet by occurrence. Fishes were the second largest dietary component, making up 32.0% of the diet by occurrence. Of the cephalopod species consumed, Watasenia scintilans was the principal prey item.