• Korean Journal of Ichthyology
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• v.19 no.4
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• pp.365-370
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• 2007

Two species, Psettina tosana and Pseudorhombus oculocirris, were collected firstly off the Saryang Island, South Sea of Korea. P. tosana is clearly distinguished from its related species, P. gigantea and P. iijimae, in having 9~10 pectoral fin rays, fewer number of lateral line scales, colorless snout region, and no gill rakers on the upper limb of gill arch. P. oculocirris much differs from P. pentophthalmus in having flattish and free rays of anterior dorsal fin, lots of scales in the lateral line, and tubular anterior nostril with flap on ocular side only.

• Korean Journal of Ichthyology
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• v.21 no.4
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• pp.307-310
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• 2009

A specimen (862.3 mm standard length) of Pisodonophis cancrivorus (Richardson, 1848), family Ophichthidae, was first collected from the coast of Uljin-gun in Gyeongsangbuk-do, Korea in September 2008. This species is characterized by the following: fleshy protrusions of upper jaw in the front and rear of the posterior nostril, 3~5 irregular rows of granular teeth in bands on maxilla, mandible and vomer, and origin of dorsal fin above the middle of the pectoral fin. Based on the fleshy protrusions found on its upper jaw, a new Korean name "dol-gi-ba-da-baem" has been proposed for this species.

• Korean Journal of Ichthyology
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• v.12 no.1
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• pp.20-24
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• 2000

The blenniid fish, Istiblennius dussumieri (Valenciennes) was reported on the basis of six specimens collected from rocky shores on the Yokonami Peninsula, Kochi Prefecture, southern Japan. This species was characterized by wavy, dusky stripes on its dorsal fin, 14 pectoral fin rays, 38 to 42 vertebrae, branched supraorbital cirrus, finger-like nasal cirrus, seven to ten vertical, dark bands on the body and canines absent on both jaws. Although the occurrence of this species may be due to larval transport by the Kuroshio Current, this is the first record of I. dussumieri from Japan represents a remarkable northern range extension of the species in the western Pacific Ocean.

• Korean Journal of Ichthyology
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• v.23 no.4
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• pp.310-313
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• 2011

This is the first report of Aprion virescens, belonging to the family Lutjanidae, collected in Korea. The specimen (151.4 mm in standard length) was caught by the gill net in the coastal waters of Jeju Island on 30 October, 2009. This species is characterized by having a deep vertical groove in front of eye, very short pectoral fin almost equal to snout length, and four black spots on dorsal fin. We propose a new Korean name, "Nok-saek-tung-dom-sok" and "Nok-saek-tung-dom" for the genus and species, respectively.

• Korean Journal of Ichthyology
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• v.13 no.1
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• pp.1-5
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• 2001

Taxonomic review of Cobitis laterimaculata was carried out based on 17 specimens collected from the Caozejiang River, Huangzezhen, Shengxian county, Zhejiang province, China. The species shares several notable characters with Niwaella spp., including the posterior position of the dorsal fin, small head, color pattern without pigmentary zones of Gambetta, short and curved suborbital spine, short and subequal barbels, strong carina on caudal peduncle, and lack of a lamina circularis on the pectoral fin base in males. We conclude that Cobitis laterimaculata should be transferred from Cobitis to Niwaella.

• Korean Journal of Ichthyology
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• v.26 no.4
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• pp.336-339
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• 2014

The spadenose shark, Scoliodon laticaudus, belongs to the family carcharhinidae was described as the first record from Korea based on a single specimen collected from the South Sea of Korea. The species is characterized by having a greatly depressed and trowel-shaped head, a depressed and long snout, triangular pectoral fins, and posterior tip of the first dorsal fin reaching the middle of pelvic fin. We propose a new Korean names of the genus Scoliodon and the species S. laticaudus as "Nab-jag-ju-dung-i-sang-eo sog" and "Nab-jag-ju-dung-i-sang-eo", respectively.

• Journal of Aquaculture
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• v.10 no.1
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• pp.49-54
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• 1997

Characteristics of sex ratio and morphometric traits of induced allotriploid between female rainbow trout, Oncorhynchus mykiss and male cherry salmon, O. masou were performed. Sex ratios in both rainbow trout and cherry salmon were equally 1:1, while hybrid and allotriploid revealed higher proportion of male offspring (p<0.01). Body trait measurements of allotriploid in head hight/head length, length of dorsal fin base/body length and length of pectoral fin/body length were intermediate to their parental species, while in length of upper jaw/head length, allotriploid much more resembled that of rainbow trout. These facts proved that allotriploidization improved characters in sex ratio and morphometric traits compared to those o their parental species.

• Development and Reproduction
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• v.22 no.4
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• pp.361-367
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• 2018

The newborn, Hippocampus kuda larvae were 6.97-8.81, standard length (SL) mm (mean 7.89 mm) and mouth and anuse were open. Dorsal fin rays 15-18 and pectoral fin-rays were counted 8 and had 10-11+21 myotomes, body's bony plate ring being developed strongly in the central axis of myotomes part. 4 days after bearing, the SL was 7.02-9.47 mm (mean 8.24 mm) and nostrils began to open. 12 days after bearing, larvae attained to 8.91-11.2 SL mm (mean 10.0 mm). From this time, their unique predation habit appeared. 21 days bearing, larvae attained to 12.1-14.8 SL mm (mean 13.4 mm) the and thorn of back was enlarged among the plate formed around ring. 41 days bearing, seahorses attained to 17.1-17.8 SL mm (mean 17.4 mm) and the number of body's bony plate ring of the top of rings trunk was 11 and on the tail of them was 33-36, similar to figure of adult.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.56 no.5
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• pp.708-715
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• 2023

Hybridization is a major production method used to combine beneficial traits from two different species to obtain a potentially dominant trait. In China, Takifugu obscurus and T. rubripes were artificially crossed, and the resulting hybrids had an average body weight 38.06-8.93% higher than that of the parental species, which enabled the hybrids to be grown in freshwater. This study aimed to provide the basic data necessary for the classification of T. obscurus♀×T. rubripes♂ hybrids in terms of economic value and market potential. Morphological comparing the morphology of hybrids and parental species, we discovered that the hybrids had intermediate traits of the parental species. In morphometrics, the hybrid index (HI) value of head length against standard length was close to the trait of T. rubripes, and the HI values of preanal length and predorsal length were close to those of T. obscurus; however, the HI values of nasal length, snout length, length of anal fin, length of pectoral fin, caudal peduncle depth and caudal peduncle length were found to be unique characteristics of the hybrids. Regarding molecular analysis, a 99.8% nucleotide sequence similarity was found between the hybrid and T. obscurus.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.14 no.3
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• pp.179-188
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• 1981

The authors made an investigation concerning the geographical distribution and some major differentiations in morphological characteristics associated with the each habitat, of the pond smelt, Hypomesus olidus, which was introduced into Korea more than 50 years ago. Major characteristics utilized for the comparison study were upper jaw (maxillary), number of fin rays, scale structure, vertebral count, number of pyloric caeca, number of gill rakers, and the relative measurements of these and other internal characters. 1. The main areas of natural distribution are Paro Lake, Soyang Lake, Han River, Euirim Lake, and Ogjeong Lake (or Unam Lake) and the tributaries of these waters. 2. Morphological variations varied when the mean values of measurements from each area were compared with the standard measurement value by mosaic comparison, and in some instances a significant variation was found. 3. The most significant variations were found in the number of fin rays of pectoral and anal fins; the lengths from the tip of snout to the origin of pectoral fin, from snout to ventral fin, and from snout to anal fin, relative to standard body length; eye depth relative to head length; upper jaw: the number of pyloric caeca and the scale structure. Variations, on the other hand, by each habitat were not clear in the numbers of ventral and dorsal fin rays, gill rakers, vertebrae and lateral line scale : and the depth of caudal peduncle and distance from the tip of snout to the origin of dorsal fin relative to standard body length. 4. The scales of pond smelt showed some differences in the shape of scales, the shape and position of the focus and the number of ridges according to the scale positions on the body. No radii were present. The relations between longitudinal and transverse diameters of the scale suggest that the pond smelts of Soyang Lake and Un-am Lake are closely related, and those of Han River and Euirim Lake are also closely related. 5. The geographical variations in morphology of the pond smelt seem to have resulted from the variations in turbidity, water temperature, salinity (rather conductivity) and currents. 6. From the results obtained, it may be concluded that such factors as supramaxillary, relation between scale length and its breadth, number of caudal vertebrae and eye depth relative to head length may be used as the key characters for the classification of geographical varieties of Pond smelt.