• 한국발생생물학회지:발생과생식
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• 제20권2호
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• pp.51-63
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• 2016

The landmark-based morphometric and meristic analysis of the kelp grouper (Epinephelus bruneus), red spotted grouper (E. akaara) and seven-banded grouper (E. septemfasciatus) were performed to compare the differentiation of overall body shape and structure. The measurements of the morphometric dimensions were observed in 25 parts (truss dimension: 16 parts; head part dimension: 9 parts) of 38 morphometric dimensions and also meristic differences observed in 3 parts (dorsal fin, anal fin and caudal fin) of 6 meristic counts (P < 0.05). Observed morphometric characteristics primarily involved in truss and head part dimension, kelp grouper have larger values in caudal part of truss dimension, kelp grouper, red spotted grouper and seven-banded grouper have similar values in pectoral part of truss dimension, in addition to, results of head part dimension showed that red spotted grouper have smaller values in overall dimensions (P < 0.05). As meristic characteristics, kelp grouper have more number of anal fin rays than other fish, red spotted grouper have more number of dorsal soft rays than other fish, and seven spotted grouper have more number of anal soft rays, and caudal fin rays than other fish (P < 0.05). Photographed under the x-ray, kelp grouper have the most curved vertebral column and largest swim bladder than other fishes (P < 0.05). Our results of this study confirmed that 3 subfamily fishes adequately can distinguish with external body shape, and we hope that the results of our study could be used to identify in Serranidae family as taxonomical parameters.

• 한국해양학회지
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• 제13권2호
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• pp.26-30
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• 1978

노가리는 명태, Theragrachalcogramma(PALLAS)의 미성어라고 오래전부터 알려져 왔으며 우리나라 수산자원보호령의 미성어 보호대책 규정에 의해 종래에는 그 어획이 금지되어 있었다. 그러나 수산당국은 자원학적 견지에서 노가리를 어획하여도 무방하다는 해석을 내려 1974년부터 노가리에 대한 어획금지규정을 폐기하였으며 현재까지 어획을 허용하고 있다. 명태는 우리나라 국민의 중요한 식량원이며 동해안에서 비교적 산업적 가치가 높은 데도 불구하고 이 집단에 대한 자원생물학적 지견과 자원의 변동법칙은 아직 잘 알려져 있지 않으며 일부 어민들은 심지어 노가리는 명태의 미성어가 아니라고 주장하고 있는 것이 현상이다. 명태는 개체 또는 집단으로서 넓은 변이성을 가진 어종이라고 알려져 있지만, 현금과 같은 격렬한 어업 압력에 과연 얼마나 견딜 수 있는가를 규명하는 일이 요청되고 있다. 본고에서는 노가리와 명태에 대해 몇가지의 형태학적 집단표징을 관찰하여 검토한 결과를 보고한다.

• 한국해양학회지
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• 제4권1호
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• pp.17-35
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• 1969

This work concerns morphological studies of the Japaness jack mackerel, Trachurus japonicus(Temminck & Schlegel). A total of 48 random samples consisting of 2669 fish is examined, representing three geographic regions, namely, Kamakura, Nagasaki, and Tottori. Preservation affects length and weight of fish considerably, but the variability after 10 days is shown to be negligible. The variability in measuring the morphometric characters due to different measures and orders is found to be significant. They are relatively small, however, compared to the variability in mean length to be expected in samples drawn from the population. Two meristic characters, namely, anal and second dorsal fin rays and three morphometric characters, namely, head length, first and second dorsal insertion distances are chosen for the study. Results of the statistical analysis reveal that differences in the selected meristic characters among samples within and between regions are found to be significant. In general, it is reasonable to state that the jack mackerel collected in Nagasaki region, on the average, have greatest number of anal fin ray and second dorsal fin ray followed by Kamakura, and Tottori regions in that order. It is found that although no significant differences in the slope of regression line are noticed, the mean differences of the selected morphometric measurements in relation to fish length are found to be significant among samples within each region. Differences in the regression coefficients as well as the adjusted sample means are found to be significant between regions. The analysis suggests that samples from Nagasaki region, on the average, have longest head length and greatest distances from snout to the insertion of first dorsal and second dorsal fins followed by Kamakura, and Tottori regions in that order.

• 한국어류학회지
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• 제21권2호
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• pp.67-75
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• 2009

한국의 Cottus 속 어류 9개체군들의 형태 및 유전 변이를 서로 비교하였다. 형태변이 분석은 계수, 계측 형질 및 수정난의 크기를 분석하였으며, 유전 변이 분석은 AFLP fingerprinting을 이용하였다. 조사결과 동해로 흐르는 하천의 둑중개 집단은 서해와 남해로 흐르는 강 또는 하천의 둑중개 집단과 계측형질에서 유의적인 차이를 보였으나, 계수형질과 수정난 크기의 차이는 없었다. 하지만 배봉천의 Cottus sp. 집단은 계수형질에 있어 한둑중개와 비슷하였고, 배지느러미의 계측형질과 수정난의 크기는 둑중개와 비슷하였다. AFLP를 이용한 유전적 거리를 추정한 결과 둑중개 집단간 0.110~0.221로 나타났다. 한둑중개 집단과 둑중개 집단간 0.542~0.621로 나타났고, 배봉천의 Cottus sp. 집단과 둑중개 집단 간 0.222~0.304로 나타났다. UPGMA dendrogram결과 Cottus sp. 집단은 다른 둑중개 집단과 분리되었다.

• 한국어류학회지
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• 제18권2호
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• pp.107-111
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• 2006

참돔, Pagrus major (♀)과 감성돔, Acanthopagrus schlegelii (♂) 그리고 이들간 유도 잡종 개체의 비늘 특성을 조사하였다. 본 연구 결과, 유도 잡종 개체의 비늘 외형은 양친의 중간적인 특성을 나타내었다. 참돔과 감성돔의 primary apical grooves와 측선 비늘 수의 평균은 각각 $10.5{\pm}2.6$과 $49.5{\pm}0.5$를 나타내었으며, 유도 잡종의 평균 primary apical grooves 수와 평균 측선 비늘 수 역시 양친의 중간적 계수형질의 경향을 보였다(P<0.01). 본 연구에서의 계수형질은 본 연구 대상 어류인 돔류에서의 동정에 유용한 parameter로 사용될 수 있을 것이다.

• 한국동물학회지
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• 제22권4호
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• pp.153-164
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• 1979

A total of 352 specimens of congeneric species of Agkistrodon was collected and morphometric analysis and starch-gel electrophoresis were carried out in order to investigate the taxonomic status of this genus. The results obtained in this study are as follows: Morphometric analysis 1. Three species are recognized based on Gloyd's criteria. There was no specimen that was doubtful to classify correctly. Therefore, it seems that Gloyd's morphological characters are good criteria to identify each species. 2. All three species are sympatric at two localities (Mt. Seolag, Gangwon-do, and Mt. Deogyu, Jeonra-bugdo) and A. caligino년 and A. b. brevicaudus are sympatric at Gwangneung and Mt. Yongmun, Gyonggi-do. No hybrids were found in these sympatric localities. 3. Notable sexual dimorphism was found in meristic characters. 4. A. saxatilis has signicantly more number of ventrals and shorter tail ratio than other two species. 5. There were no significant meristic character differences between A. caligino년 and A. b. brevicaudus. Genetic analysis 1. Among 26 loci investigated, 12 loci (46.1%) were identical in their mobility, 4 loci (15.4%) were nearly identical with minor frequency differences, and 10 loci (38.5%) showed interspecific mobility difference. 2. The average proportion of polymorphic loci was 9.03%. This is considerably less than that of other vertebrates. 3. The average S and D values between species are .695 and .342 respectively. These values indicate that three taxa are distinct species. 4. A. caliginosus is genetically more related to A. saxatilis than to Agkistrodon, namely A. b. brevicaudus, A. caligino년 and A. saxatilis, as proposed by Gloyd. Far from being mere morphological variants, as suggested by Kang and Yoon (1975), they are highly distinctive evolutionary units.

• Fisheries and Aquatic Sciences
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• 제22권6호
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• pp.12.1-12.8
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• 2019

Background: Wild fish populations stock is continuously diminishing in the Indo-Ganges river basin, and the population status of most fishes is unidentified. The identification of the population status and the conservation of commercially important and endemic wild fish populations in this region are crucial for the management. The aim of this paper was to identify the population status of Cirrhinus reba, a promising aquaculture but vulnerable species in the Indo-Ganges river basin in Bangladesh. Methods: C. reba samples were collected from four isolated populations of the Brahmaputra (n = 30), the Padma (33), the Karatoya (31), and the Jamuna Rivers (30) in Bangladesh, and the population status was evaluated using morphometric and landmark comparisons. Data were analyzed with the Kruskal-Wallis test, univariate analysis, discriminant function analysis, and the formation of a dendrogram. Results: Three meristic characters (Pectoral fin rays, caudal fin rays, scale in lateral lines), four morphometric characters (head length, pre-orbital length, post-orbital length, maximum body depth), and truss measurement (4-7) were significantly different among the stocks. The step-wise discriminant function analysis retained 15 variables from morphometric and landmark measurements that significantly differentiated the populations based on the constructed DFI and DFII. Discriminate function analysis also showed that 91.2% of the original groups were classified into their correct samples. The cluster analysis of Euclidean distances placed the Jamuna population in one cluster and the Brahmaputra, the Padma, and the Karatoya populations in the second one. Conclusion : Morphological differences among the stock were probably due to different ancestral origin. This is the first report about population status of C. reba in their natural habitat of the Indian subcontinent. Further genetic studies and the evaluation of environmental impact on C. reba populations in Bangladesh are suggested to support our findings.

• 환경생물
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• 제39권1호
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• pp.6-15
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• 2021

Various biometric and geometric measures were used to discriminate between the morphologically similar river puffer, Takifugu obscurus, tiger puffer, T. rubripes, their hybrids, and their triploid hybrids. The hybrids and triploid hybrids had greater anal fin width, nostril width, and snout length than the parental species (p<0.05). However, they had less caudal peduncle depth, inter-orbital width, head length, and head width(p<0.05). The morphometric and meristic characteristics of the hybrids and triploid hybrids were either intermediate between the parental species or more similar to those of one parental species. However, the external morphology of the hybrids and triploid hybrids was predominantly maternal. The triploid hybrids had asymmetry in the fin rays and gill raker numbers. This study identified phenotypic characteristics by distinguishing the morphological variables of river puffer, tiger puffer, their hybrids, and their triploid hybrids.

• 한국수산과학회지
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• 제55권3호
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• pp.338-344
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• 2022

This study evaluated the external form of Rhodeus notatus TSV (transparent-scaled variant) type identified in Korea for the first time and compared it with that of the normal type. The TSV units newly found on Rhodeus notatus are iii10 of dorsal fin and anal fin iii10, which are similar to that in the normal type, considering the observing coefficient of each part's fins. The external form is, transparent enough to see the red gill filament in the operculum, the spiral digestive organ is observed opaquely, and numerous melanophores are stained at the upper part of abdomen. The coloration and scales are different between TSV type and normal type; however, there is no difference in the external form and meristic character.

• 한국환경생태학회지
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• 제30권4호
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• pp.745-750
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• 2016

태화강에 분포하는 금강모치의 형태적 특징과 개체군 특징 조사를 2014년 4월부터 2015년 4월까지 실시하였다. 태화강 상류역인 국수천(울산광역시 울주군 범서읍 망성리)이 금강모치(Rhynchocypris kumgangensis) 새로운 서식지로 확인이 되었으며 또한 강릉남대천 이남의 동해남부로 유입되는 하천에서도 처음 발견되었다. 태화강에 서식하는 개체군은 한강 개체군에 비해 미병장(CPL)이 미병고(CPD)에 비해 짧았으며 그 외의 형질은 거의 일치하였다. 계수형질에 있어 태화강 개체군은 측선비늘수, 측선상부비늘수, 측선하부비늘수 등이 다소 적었고 그 외의 형질은 일치하였다. 전장빈도분포도는 45~65mm 이었고 평균 전장은 54.2mm 이었다. 공서어종 중 피라미(Zacco platypus) 25.2%, 버들치(Rhynchocypris oxycephalus) 24.1%) 참갈겨니(Zacco koreanus) 21.8% 등의 개체수 구성비가 높았다. 전장빈도 분포도는 45~65mm 이었고 평균 전장은 54.2mm 이었다. 전장과 체중의 관계식은 $BW=0.000002TL^{3.44}$로 상수 a는 0.000002을, 매개변수 b는 3.44 이었고 건강도는 평균 1.10 이었다.