• ALGAE
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• 제20권1호
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• pp.31-36
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• 2005

Scinaia latifrons Howe occurs in rhodolith beds between 9 to 27 m depths at San Lorenzo channel, Gulf of California, Mexico. As very little was known about the morphometrics of this normally temperate species in a subtropical area, we investigated the phenological changes from December 1998 to December 1999. The gametophytic phase of the species was present from late February to late May, which represented a shorter time period to other known species in the genus. Our results suggested that two gametophytic cohorts develop over winter and early spring based on the size class structure of the frond height. Thalli became reproductively mature at a small size (1-2 cm in height) and all the plants were monoecious. Scinaia latifrons at the study location underwent allometric growth, indicated by the lack of correlation between size, width of the plants, or branching patterns.

• Applied Microscopy
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• 제19권2호
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• pp.85-98
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• 1989

The ventricular myocardia of 14, 16, 18 and 20-day-old rat fetuses and newborns have been studies by light and electron microscopic morphometrics. The volume density of the myocyte and interstitial compartments as well as volume, surface and numerical density of nuclei were estimated by light microscopic morphometrics. Whereas, the volume density of myofibrils and glycogen granules as well as the volume, surface and numerical density of mitochondria were assessed by electron microscopic morphometrics. The volume density of myocyte compartment of the ventricular myocardia in developing fetuses decreased, but increased in newborn rats. On the other hand, the volume density of the interstitial compartment increased in growing fetuses and decreased in newborns. In all groups the volume, surface and numerical density of nuclei decreased gradually with elongation of myocytes. Conversely, the volume, surface and numerical density of mitochondria and volume density of myofibrils and glycogen granules in ventricular myocytes incresed. The increase in numerical density of mitochondria probably reflects an increase in metabolic activity. Sarcomere length also increased during development.

• 한국약용작물학회:학술대회논문집
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• 한국약용작물학회 2011년도 춘계학술발표회
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• pp.86-87
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• 2011

• 한국양식학회:학술대회논문집
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• 한국양식학회 2003년도 추계학술발표대회 논문요약집
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• pp.28-28
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• 2003

Viable interspecific hybrids between yellowtail flounder (Pleuronectes ferrugineus, Store.) and winter flounder (Pleuronectes americanus, Walbaum) were produced by artificial insemination of yellowtail flounder eggs with winter flounder sperm. However, mean fertilization rate, hatching success and early survival up to 3 weeks post hatch were significantly lower than those of parental pure cross controls (P<0.01). Overall, cytogenetic traits (karyological analysis and estimation of cellular DNA contents using flow cytometry) of hybrid flounder were intermediate between the two parental species. Microsatellite assay was used to distinguish the parental genomes in the hybrids; in most cases, one allele was specific to each of the parents. Morphometrics assessed by body proportions indicated that hybrids generally displayed a morphology intermediate between the maternal and paternal species. Interspecific hybrids exhibited abnormal and retarded gonad development in both sexes based on histological analysis of gonads from adult fish. The sterility of the hybrids presents a significant advantage for their use in aquaculture, as potential escapees would not be capable of reproducing in the wild and contaminating natural stocks.

• 환경생물
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• 제20권4호
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• pp.339-346
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• 2002

동해 덕산항에 생육하는 포기거머리말(Zostera caespitosa Miki)군집의 생물계절학과 형태 변이를 1998년 3월부터 2000년 8월까지 조사하였다. 포기거머리말의 형태적인 형질(식물체 길이, 잎 길이, 엽초 길이, 잎 너비와 잎 수),생식 형질(불염포, 육수화서와 종자)의 수와 크기, 생육밀도, 생물량과 이화학적 특성 (수온, 영양염 농도)을 관측하였다. 형태적인 형질은 엽초를 제외하고 계절에 따라 유의한 차이 (p<0.05)를 나타내었다. 식물체길이는 수온에 따라 명확한 년 순환을 나타내었다. 영양지는 지속적으로 출현하였으나 생식지는 1월 중순부터 4월초까지 적은 수만이 출현하였다. 포기거머리말의 개화기는 2월 중순부터 시작되었으며, 4월초에 성숙한 종자가 출현하였다. 해수내의 질산염과 인산염의 농도는 계절에 따른 차이를 나타내었으나, 암모니아의 농도는 계절에 따라 다양하게 나타났다. 식물체의 형태적인 형질과 이화학적인 형질은 유의한 상관관계를 나타내지 않았으나, 포기거머리말 생식 단계와 생활사는 수온에 영향을 받는 것으로 추정된다. 덕산항에서 포기거머리말군집의 생육밀도와 지상부 생물량은 각각 $511.6\pm{25.6}\;shoots\;m^{-2}$와 $413.4\pm{19.8}\;g\;dry\;wt\;m^{-2}$로 추산되었다.

• 한국해양학회지:바다
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• 제8권2호
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• pp.70-77
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• 2003

동해 덕산항에 생육하는 거머리말(Zostera matina L.) 개체군의 생물계절학과 형태 변이를 1998년 3월부터 2000년 8월까지 조사하였다. 거머리말의 계절에 따른 생육관계, 생육밀도, 생물량과 환경요인을 비교 분석하였다. 수괴내 영양염 농도는 계절에 따라 유의한 차이를 보였으며, 질산염은 하계에 낮았으나, 암모니아는 높은 농도로 나타났다. 거머리말 생육지에서 퇴적물의 유기물 함량은 하계보다 동계에 높게 나타났다. 영양지의 길이는 54.2(3월0~100.0cm (10월), 생식지의 길이는 97.8(3월)~213.0 cm(7월) 범위로 다양하였으며, 생식지는 3월 중순부터 9월초까지 출현하였다. 생식지의 개화는 수온이 12$^{\circ}C$부터 시작하여 21$^{\circ}C$까지 지속되었으며, 열매 성숙은 수온이 22~$25^{\circ}C$범위에서 나타났다. 영구 반형구(0.25$m^2$)내의 생육밀도는 38~136(평균 80.3$\pm$6.5), 생물량은 190(10월)~922 g dry wt m$^{-2}$ (6월)로 계절에 따라 유의한 차이(P<0.01)를 보였다. 식물체의 형태적 형질과 이화학적 요인들과는 유의한 상관관계를 보이지 않았으나, 계절에 따른 수온의 변화는 거머리말 생식지의 생육단계와 영양지의 생장에 영향을 미치는 것으로 판단되었다.

• 환경생물
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• 제33권2호
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• pp.215-222
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• 2015

During our investigation of ciliates from Korea, four ciliates were isolated from the non-flood Petri dish culture of soil. They were cultured under laboratory condition and studied using standard methods morphologically, including living observations, protargol impregnations, and morphometrics. The four species are Metopus hasei Sondheim, 1929, Urosomoida agiliformis Foissner, 1982, Oxytricha proximata Shibuya, 1930, and Cladotricha sp. in Nie${\ss}$en (1984) respectively.

• Journal of Species Research
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• 제5권3호
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• pp.343-347
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• 2016

Two pleurostomatid ciliates, Amphileptus litonotiformis Song, 1991 and Kentrophyllum setigerum (Quennerstedt, 1867), were collected from the coastal waters of Korea. Their morphologies are described based on live observation and protargol impregnation, and their diagnoses and morphometrics are provided. Additionally, sequence information of small subunit ribosomal RNA obtained from two species were reported.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제26권6호
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• pp.606-612
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• 2000

This study was performed to investigate the average anthropometric value of normal Korean men and women and to compare the preceding literatures. Additionally, average Korean profilogram was made to serve as a template for diagnosis of facial form. Eighty five Korean subjects(41 men, 44 women) aged between 21 to 26 were selected by members of the author's department on the basis of intact dentition and Class I occlusion without facial asymmetry. Frontal and lateral photographs were taken under standardized condition with digital camera. The image was magnified and adjusted according to the FH plane of cephalometric radiographs and digitized using personal computer. To compare the Western beauty, 25 esthetically pleasing female was selected to measure various angle and distance of the face. 1. It was possible to calculate the mean coordinate value of Korean normal samples which enables the direct visualization and comparison with the use of template. The method in this study was easy to applicate under the Microsoft $Windows^{(R)}$ bases. 2. Maxillary vertical hypoplasia, upper and lower lip protrusion was characteristics of Korean norms and relatively narrow alar base distance, less conspicuous nasal projection was observed. As the vermilion exposure and upper lip length was more than western norm, chin looks shorter than western. To compare the Korean and Western esthetically pleasing profile, facial convexity and nose was less conspicuous in Korean women.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제3권1호
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• pp.32-40
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• 2022

The trade-off between morphology and physical function may vary according to ecological traits. Taking a quantitative approach, we attempted to analyze the differences in the skeletal shape of the lower body and limbs in relation to the ecological traits of four anuran species (Dryophytes japonicus, Glandirana rugosa, Pelophylax nigromaculatus, and Lithobates catesbeianus) occurring in South Korea. Body size, locomotor mode, microhabitat, trophic positions, and predator defense mechanisms were selected for the ecological traits of the anurans. The pelvis, ilium, and urostyle, which are associated with locomotor performance, were selected for the skeletal shape of the lower body. The ratio of limbs, which is related to locomotor mode and microhabitat, was confirmed by analyzing the skeletons of the forelimbs (radio-ulnar and humerus) and hindlimbs (femur and tibiofibular). Both landmark-based geometric morphometrics and traditional methods were used for skeletal shape comparison. The skeletal shape of the lower body was completely different among the four species, whereas the ratio of the limbs was only different in D. japonicus. The skeletal shape of the lower body may be related to body mass and predator defense mechanisms, whereas the ratio of the limbs was related to the locomotor mode and microhabitat. Quantifying these morphological differences among various species can help elucidate the mechanisms of behavioral and morphological changes in response to ecological effects.