کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4398275 | 1305935 | 2006 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of salinity, temperature and pH on the survival of the nemertean Procephalothrix simulus Iwata, 1952
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The salinity, temperature and pH tolerance of Procephalothrix simulus Iwata, 1952, were experimentally studied. In hypo-media, the nemerteans could survive 96 h in 3.3â° solution at 10 °C (median lethal salinity [LS50] was not determined at this temperature), and 96 h LS50 were 7.3â° and 13.5â° at 20 °C and 30 °C, respectively. In hyper-media, 96 h LS50 values were 53.9â°, 47.1â° and 41.4â° at 10 °C, 20 °C and 30 °C, respectively. The trend of body weight changes in diluted media indicated that this nemertean is a volume regulator. During a 96-h exposure in media at 0 °C, worms were thanatoid but could recover if the temperature was gradually elevated to 20 °C. In thermal tolerance experiments, the nemertean survived 96 h in seawater of 30 °C, and worms suffered high mortalities when the temperature exceeded 32 °C. Present results suggest that the interaction of temperature and salinity on the lethal effects on P. simulus is significant (P < 0.05). Elevated temperature (range 10-30 °C) decreased the worm's solute tolerance, and elevated salinity (range 18-38â°) decreased the worm's thermal tolerance. The survival pH level for this nemertean ranged from 5.00 to 9.20.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Experimental Marine Biology and Ecology - Volume 328, Issue 2, 24 January 2006, Pages 168-176
Journal: Journal of Experimental Marine Biology and Ecology - Volume 328, Issue 2, 24 January 2006, Pages 168-176
نویسندگان
Yanfang Zhao, Shichun Sun,