• Proceedings of the KSAR Conference
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• 2003.06a
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• pp.23-23
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• 2003

프리마틴(freemartin)이라 함은 반추동물들 중 특히 소에서 나타나는 간성(intersex)형태로 이성 쌍자의 경우 태어난 암컷의 대부분이 정상적인 자성 생식기의 발육 및 발생양상을 지니지 못하여 생식불능상태로 되는 것으로 알려져 있다. 최근 실용화된 수정란이식이나 쌍자유기 등의 기술은 현재 일반 농가에 까지 정책적으로 확대 보급되어 산업화되고 있는 실정이나 불행히도 이러한 기술들을 이용하여 생산된 개체들 중 상당수가 이성쌍자로 이들 중 암컷 개체들은 거의 freemartin으로 생산되어 실지 노력에 비해 경제적 효과들을 크게 반감시키고 있다. 뿐만 아니라 생산된 freemartin 개체들에 대하여 조기 진단 없이 다만 형태적으로 암컷으로 판단하여 번식우로 사양관리 함에 따른 경제적 손실이 매우 크다 할 수 있겠다.

• Fisheries and Aquatic Sciences
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• v.5 no.3
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• pp.235-244
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• 2002

Three penaeid species, Penaeus monodon, P. semisulcatus and Metapenaeopsis lata are reported from the southeastern coast of Korea. P. monodon and P. semisulcatus have been incorrectly known so far as P. bubulus and P. monodon, respectively, in Korea. M. lata is the first record of this species from Korean waters. Morphological diagnoses are given with coloration and distribution for the three species.

• The Korean Journal of Malacology
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• v.32 no.3
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• pp.197-202
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• 2016

This research reports the intersexuality of bivalves, such as Crassostrea gigas, Mytilus galloprovincialis, Rupiditapes philippinarum, Gomphina veneriformis and Barnea davidi discovered during the process of investigating the ecological health status of coastal waters of Korea. In intersex ovaries, the opposite germ cells were observed either individually or in groups in the interfollicular space and inside the oogenic follicle. Oocytes in the intersex testis were at the previtellogenic or initial vitellogenic stage. They were either scattered individually or in groups in the interfollicular space and inside the spermatogenic follicle. The intersexuality in C. gigas was 10.4% (n = 19/183), while female (12.2%, n = 6/49) exhibited a higher proportion than male (9.7%, n = 13/134). The intersexuality in M. galloprovincialis was 31.7% (n = 19/60), while female (36.4%, n = 12/33) exhibited a higher proportion than male (25.9%, n = 7/27). The intersexuality in R. philippinarum was 11.2% (n = 11/98), while male (16.7%, n = 7/42) exhibited a higher proportion than female (7.1%, n = 4/56). The intersexuality in G. veneriformis was 28% (n=30/107), while male (31.5%, n=17/54) exhibited a higher proportion than female (24.5%, n=13/53). The intersexuality in B. davidi was 18.4% (n = 7/38), while female (35.7%, n =5 /14) exhibited a higher proportion than male (8.3%, n = 2/24).

• The Korean Journal of Malacology
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• v.28 no.4
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• pp.305-312
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• 2012

Manila clam, Ruditapes philippinarum (SL; $32.74{\pm}2.18mm$, TW; $8.29{\pm}1.41g$, N; 450) were exposed to various concentrations of naphthalene for 20 weeks. Exposure concentrations of naphthalene established control, solvent control (ethanol), 30, 60, 90 and $120{\mu}g$ Nap $L^{-1}$ following results of 96h acute exposure. After exposure during 20 weeks, survival rate of the manila clam was lowed in 60, 90 and $120{\mu}g$ Nap $L^{-1}$ exposure group compared control group. Also, sex ratio of male was higher in $60{\mu}g$ Nap $L^{-1}$ exposure group (${\chi}^2=5.492$, P < 0.05) but lowed $90{\mu}g$ Nap $L^{-1}$ exposure group (${\chi}^2=4.214$, P < 0.05) and $120{\mu}g$ Nap $L^{-1}$ exposure group (${\chi}^2=30.118$, P < 0.05). Gonad development was delayed in female (> $60{\mu}g$ Nap $L^{-1}$) and male (> $30{\mu}g$ Nap $L^{-1}$). Intersex was 16.28% in female, 1.68% in male. In this result, naphthalene caused survival decrease, imbalance of sex ratio, delay of gonad development of the manila clam. Also, chronic exposure to naphthalene suggested abnormal effects in reproduction of the manila clam.

• Development and Reproduction
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• v.10 no.4
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• pp.247-254
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• 2006

It is well publicized that the existence of various endocrine disrupting chemicals threatens normal sexual development of many sedentary marine fishes in the coastal areas. However, a suitable marine fish species for efficient monitoring of this threatening has yet to be identified. One of the difficulties in estimating the effect of endocrine disruption in marine fish is the absence of clear distinction between testicular and ovarian structures at the early stages of sex differentiation. In search of a potential test species, we have investigated the microscopic structures of sexually undifferentiated and differentiated gonads and the susceptibility of gonadal differentiation to exogenous sex steroids during the sex differentiation period in a sedentary marine rockfish, Sebastes schlegeli. Male gonads in this species contained dark pigmentation that made them distinct from female gonads. Treatment either with $estradiol-17\;{\beta}(E_2)$ or $17\;{\alpha}-methyltestosterone$ (MT) significantly altered the sex ratios with the complete sex changes or the occurrence of ovotestis that was easily identified by the mixed structure of dimorphic gonads (coexistence of ovarian cavity/primary oocytes and dark pigmentation/seminiferous tubules). Results in this study suggest that S. schlegeli can be developed as a monitoring/test fish species for endocrine disruption in marine fish in the coastal areas.

• Development and Reproduction
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• v.17 no.2
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• pp.73-78
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• 2013

This study histologically describes the intersexuality of Scomberomorus niphonius collected from the coastal area near Jeju Island. A total of 126 S. niphonius, collected from March to July 2012 with a total length of 62.4 cm (${\pm}17.5$) and a total weight of 1,701.9 g (${\pm}1,528.9$) were used for analyses. From a histological perspective, two types of intersex were confirmed. One type had scattered germ cells from the opposite sex within the gonad. The second type developed germ cells from the opposite sex in the connective tissue of the outer gonadal membrane. The intersexuality was 14.3% (n=18/126), with females (21.3%; n=16/75) exhibiting a higher rate than males (3.9%; n=2/51). There was no displayed correlation between intersexuality and the total length and weight.

• Journal of Veterinary Clinics
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• v.27 no.1
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• pp.83-87
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• 2010

Hermaphroditism occurs rarely in human and animal populations. Previously, in Korea, The hermaphrodite dog in American Cocker Spaniel dogs have been reported in six cases. However, in this case, we found a hermaphrodite dog in Korean native Jindo dog. The characteristics were its enlarged os clitoris that was shown a reddish fingerlike structure protruding from the vulva. The dog was diagnosed as hermaphroditism with ovotestes. To our knowledge, this report is the first case of hermaphroditism in Korean native dog.

• Clinical and Experimental Reproductive Medicine
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• v.13 no.2
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• pp.161-174
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• 1986

A chromosomal study was performed in a total of 162 urological patients during past 2$2{\frac{1}{2}}$ years (Feb. 1984 - Aug. 1986). Of these 78(48%) patients had abnormal chromosome complements. Among all patients with chromosome abnormalities, 88% (69/78) had aberrations of chromosome number, 8% (6/78) had aberrations of chromosome structure and 4% (3/78) had aberrations of both. 90% (65/72) of numerical abnormality was Klinefelter's syndrome and the structural abnormality rate (5.6%, 9/162) was less than that (6.99%) of general population. The chromosomal study was mandatory for the detection of intersex in small testes or hypospadias with cryptorchism or clitoromegaly or bilateral cryptorchism. But unilateral cryptochism or hypospadias with normal scrotal testes was not thought to be indication of the chromosomal study if the external genitalia are otherwise quite normal.

• Journal of East-West Nursing Research
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• v.28 no.1
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• pp.67-74
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• 2022

This paper reviewed the past social discussion and health research results on sexual minorities to suggest a future direction. Studies have been done to increase the social inclusion of sexual minorities and promote the health of sexual minorities. However, there is still a lot of exclusive awareness of sexual minorities in Korean society, and the researchers have not identified their health status. Studies have shown that factors that hinder lesbian, gay, bisexual, transgender, and intersex (LGBTI) people from accessing medical services are the lack of knowledge and awareness of LGBTI people and attitudes not inclusive of LGBTI people's culture. Thus, it is necessary to identify the health status of each sexual minority type and prepare health promotion measures accordingly in national health research. In addition, it is essential to provide medical personnel with sexual minority education and introduce a sexual minority education curriculum that includes theory and practice into the health care curriculum. The result of this paper may be able to act as a guide for future operation plans in health research on sexual minorities.

• The Korean Journal of Malacology
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• v.29 no.1
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• pp.33-41
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• 2013

This study investigated concentration of metal ions, intersexuality and histological alterations of digestive gland in Mytilus galloprovincialis. Samples were collected from two areas of Gamak Bay in May, 2010. The concentration of metal ions showed that Al ($366.5{\pm}249.7$ mg/kg) was highest and Zn ($179.5{\pm}67.8$ mg/kg) was second high concentration. Co ($1.0{\pm}0.2$ mg/kg) was lowest. The intersexuality was 26.4% and males (38.8%) was higher than the females (12.9%). Intersex type was observed four types. Destruction of digestive tubule epithelium was highest among other biomarker in digestive gland. Distribution of basophilic cell and lipofuscin was 6.1% and 1.5%, respectively.