http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 신영무 ( Soo Won Kang (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
강수원,신영무 ( Soo Won Kang,Young Moo Shin ) 한국하천호수학회 1968 생태와 환경 Vol.1 No.1
The wok has been done as one of the basic study to develop the inland fishery of Korea at the rice paddy field in Suwon City. This limnological investigaion has been carried out for three months from June 26 to September 30 in 1968. The results obtained are as followings. The range of the water level was 3.5∼32cm, and the maximum water temperatures were showed at 6 : 00p.m., 4 : 00 p.m. 2 ; 00 p.m 12 : 00 a.m. in the late June, late July, late August, and in the late September. resectively, on the other hand, the minimum temperature was always at 4 : 00∼6 : 00 a.m. The maximum water temperature in June was at 6 : 00 p. m. and those of July, August, and September were 4 : 00 p.m. 2 : 00 p.m. and 12 : 00 a.m. respectively. The values of the dissolved oxygen were 6.6∼14.1 p.p.m., and the range of pH was 5.4∼6.2, total alkalinity was 12-39 p.pm., the average values of NH4, P205, and K20 were 1.62, 0.269, 4.83 p.p.m., respectively. Both the specific and individual numbers of the phytoplankters were relativily less, and Volvox globator was dominant species among them. The individual number of this species on July 3 was more than half number of total phytoplankters. The next abundant was Navicula spp., and followed Eudorina elegans, Pandorina morum in that order. The number of species and individual of the Zooplankters was rather larger than that of the phytoplankters. Eudiaptomus Japonicus, Diaphanosoma brachyurum Brachionus rubens and Arcella vulgaris were dominant species among them. And the total individual number of Rotifera was almost equal to the summation of those of Copepoda and Cladocera, especially, the number of Brachionus rubens was 91% of all Rotifera (7446). The individual number of benthos were only 799, and the summation of Dipteran larvae (Pentaneura and Chironomus) and Oligochaeta (Branchiura) were 94% of the total benthos. Aquatic plants and fillamentous green algae were collected and were belonging to 14 Families, 16 Genera, and 20 species. Spirogyra, Spirodela polyhiza, Salvina natans. Monochoria vaginalis, Caulina serristioula and Peritraria blone were abundant species especially, Spirogyra was the most abundant one among them. It was concluded that water level, water temperature, dissolved oxygen, pH nutrition salts, and food organisms were suitable for fishculture, but, Spirogyra should be controled from the rice paddy field as soon as possible.
-
붕어, 미꾸리 및 피라미의 溶存酸素 要求量에 關한 硏究
愼英茂,姜壽遠 서울대학교 1967 서울대학교 論文集 Vol.18 No.-
Oxygen consumption rates, opercular ventilation rates and asphyxial levels of oxygen were determined at 17-20℃ for the crucian carp (Carassius carassius), loach(Misgurnus anguillicaudatus) and pirami (Zacco platypus) to investigate the effects of a relatively high content of oxygen above the lethal point. the given species was grouped into a few individuals and tested in the respiratory chambers connected in series. The priami with a vigorous activity showed a high metabolic rate of oxygen and a steep curve, and also showed a high asphyxial level of oxygen. Whereas crucian crap with a morderate activity and weel developed gill showed a relatively low and little changing metabolic rate, and then a low asphyxial level of oxygen. the loach, which is habitually inactive and has an airbreathing organs accompanying the reduced gill, showed an exceptionaly low metabolic rate and a relatively high asphyxial level or oxygen when the aquatic respiration was permitted alone. The levels of oxygen where the opecular ventilation rate reaches maximum were given as the order of loach-pirami-crucian carp. A further reduction of oxygen below this level quickly led to depress the ventilation rate, amplitude and normal activity, and is probably unfavorable to the species concerned. From the view point of fish culture, it would appear likely that this incipient limiting level, or the critical level under condition of activity can be taken as a point where the oxygen content begins to have an important effect on the production. In this experiment, a constant flow system was developed and deviced. The principle is based on the maintaining constant gravitational difference. This system maintained the adjusted flow within the maxium error of ±3%
코리아스칼라
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
