【摘要】 <正> 梁子湖是湖北省境内的大型湖泊之一。本所鱼类学组曾选择它来作为研究鱼类生物学的场所(1955—1957)。同时,为了了解与鱼类生活活动有关的若干环境因素,我们也对梁子湖区的周围环境和自然条件以及湖水和湖泥的各种性质等进行了调查。一、调查概况1955年2月,我们就在湖中央的一个小岛——梁子镇——上设立了工作站(镇位于东经114°33′34″,北纬30°15′18″)。在岛的东面湖滨设置了水文气象的观测点,每日有专人测定并记录气温、水温、日照时间、水位、风向与天气的情况等。此外,并从东沟水文更多还原

【Abstract】 Lake Liang-tze is in the Eastern District of Hupeh Province and not far from the southern bank of the Liang-tze River.This highly productive lake has an area of 438.5 square kilometres;its long shore-line(470 km.)is highly diversified by numerous little bays of varied shape and size.A rather detailed limnological survey of the whole area was undertaken between March 1955 and February 1956.The physical,chemical,and biological characters of the water were investigated by two samplings each month:the detailed results are recorded and discussed in the present paper. Lake Liang-tze is eutropic and shallow.The colloidal ferric hydroxide content is rather high:average of 7 mg./litre;the inorganic nitrogen low,average 0.18 mg./1.;but the phosphorus is very low,with an average of only 0.0024 mg./litre.Consequently,the ratio N/P is rather,high,and the available nitrogen seems to be utilized only to a very limited extent by the aquatic organisms.The quantity of plankton as a whole is only moderate,but the benthos and aquatic plants are rich in numbers and in gross weight. Cyprinus carpio is the dominant fish in the lake,and the reason for this is clearly due to the rich cover of vegetation with associated fauna,and the above-mentioned wealth of the benthos.更多还原