한국동물학회지 (The Korean Journal of Zoology)
- 제9권1호
- /
- Pages.7-15
- /
- 1966
- /
- 0440-2510(pISSN)
바지락치패의 폐사에 관한 연구-II 바지락 치패의 온도, 염분, 노출에 대한 저항성
Studies on the Natural Mortality of the Young Short Necked Clam, Tapes Japonica-II . Resistance to Temperature , Salinity and Exposure for the Young Short Necked Clam
초록
In a previous paper, the dirunal and monthly changes of the tidal flat temperature and chlorinity were observed. In this paper the resistance of the young short necked clam in various growth stages to the temperature, to the chlorinity and to the exposure were studies. The young clam used were in early (E), medium (M) and late (L) young stages whose shell lengths were 2.0-3.5mm, 9.0-11.0mm. and 14.0-16.0mm., respectively. The results were : 1. At various sea water temperatures , the chlorinity resistance of the young clam was directly proportional to the shell length. 2. When both inadequate sea water temperature and abnormal chlorinity are simultaneously applied, the resistance of these young clams was more markedly reduced than the case of applying either one of these conditions. 3. In clams of M and L, no lethal effect were observed when daily immersion of four to eight hours for a week into the sea water of any concentration of chloriity at 26-34
키워드