• Journal of Wetlands Research
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• v.15 no.4
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• pp.485-491
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• 2013

This study examined the cannibalistic polyphenism of larval salamander Hynobius leechii by the level of predation risk. Salamander eggs were collected from three regions (Mountain Inwang, Mountain Surak and Gwangju). Eggs were treated by three different risk conditions: (1) high risk, predation risk three times a day; (2) medium risk, predation risk once a day; and (3) low risk, no predation risk. Predation risk was conducted using a chemical cue from Chinese minnows. The chemical cue treatment started from the day of collection and ended one week after hatching. Post-treatment measurements were head width at the level of the eyes (HWE), largest head width (LHW), and Snout-vent length of the each larva. To compare the morphological change according to the predation risk, we modified the two head size, HWE and LHW, to HWE/LHW. A significant difference in HWE/LHW and snout-vent length was evident according to the level of predation risk. And larval mortality was increase by the predation risk. The results indicate that predation risk can cause cannibalistic polyphenism of larval salamander and this morphological change could influence larval mortality.

• Korean Journal of Veterinary Research
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• v.35 no.1
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• pp.39-44
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• 1995

Using immunohistochemical technique, three endocrine cell types were observed in the GIT of the Korean salamander, Hynobius leechii. BPP-immunoreactive cells were distributed from the pyloric region to the small intestine. A moderated number of somatostatin-immunoreactive cells were restricted to the pyloric region. 5-HT-immunoreactive cells were demonstrated throughout the GIT, reaching a peak in the pyloric region. The presence of BPP- and 5-HT-immunoreactive cells are identified for the first time in Hynobius leechii.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2006.10a
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• pp.79-81
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• 2006

• Proceedings of the Zoological Society Korea Conference
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• 1998.10b
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• pp.234.1-234
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• 1998

No Abstract, See Full Text

• Proceedings of the Zoological Society Korea Conference
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• 1997.10b
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• pp.193-193
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• 1997

No Abstract, See Full Text

• Animal cells and systems
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• v.6 no.4
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• pp.301-304
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• 2002

In our previous study, we have shown that Fgf-8 is expressed in the basal layer of the apical epithelial cap (AEC) and in the underlying thin layer of mesenchymal tissue of the regenerating limbs of Mexican axolotl, Amby-stoma mexicanum. Our present RT-PCR data also demonstrate that Fgf-8 transcript is localized both in the mesenchymal and epidermal tissues. To understand the effect of retinoic acid (RA) on the expression of Fgf-8 in the regenerating axolotl limbs, RA was injected intraperitoneally at the dediffer-entiation stage of limb regeneration. The RA treatment caused 8 change in the Fgf-8 expression profile of the regenerating limbs. In RA-treated limbs, duration of Fgf-8 expression was prolonged and a high level of expression was maintained during dedifferentiation and blastema formation stages. These results suggest that Fgf-8 is an important molecule in the process of pattern duplication of regenerating salamander limbs evoked by RA treatment.

• Korean Journal of Environmental Biology
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• v.32 no.1
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• pp.68-74
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• 2014

Scientific study has investigated the body condition differences by habitat characteristics in larvae Korea salamander (Hynobius leechii) from March to April in 2012. To examine the sensitivity of external environment (predation risk), we divided two groups according to habitat characteristic; 1) Permanent pond and 2) Temporary pond. Howere, each larva was measured by head width at the level of the eye (HWE), largest head width (LHW) and snout-vent length, and we calculated the ratio of the head size by dividing HWE/LHW. As a result, larvae were larger in permanent pond group, had a faster growth rate than in temporary pond group. When exposed to the predator, larvae in permanent pond were smaller HWE/LHW than larvae in permanent pond. Therefore, these results indicate larvae in temporary pond more sensitive to the external environment.

• Proceedings of the Zoological Society Korea Conference
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• 1999.10b
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• pp.120.1-120
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• 1999

No Abstract, See Full Text

• Proceedings of the Zoological Society Korea Conference
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• 1996.10a
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• pp.88.2-88
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• 1996

No Abstract, See Full Text

• The Korean Journal of Zoology
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• v.23 no.2
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• pp.77-88
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• 1980

The ultrastructures of the mucous glands in the Asiatic land salamander (Hynobius leechi) skin were observed by means of electron microscope. The results were as follows; 1. The mucous gland of the Asiatic land salamander skin consisted of a body of gland and a duct. The body of gland consisted of the glandular epithelial and the myoepithelial cells. 2. The light, the dark, the mitochondria-rich, the endoplasmic reticulum-developed, the secretory granule-containing and the vesiculated cells were observed in the mucous glandular epithelium. 3. It is supposed that the light, the dark and the mitochondria-rich cells are undifferentiated cells, the endoplasmic reticulum-developed cell is pre-secretory cell, the secretory granule-containing cell is mature cell and the vesiculated cell is evacuated cell.