垂钓鱼塘管理要点

随着人民生活水平的提高,喜欢垂钓的城里人越来越多,这为休闲渔业提供了千载难逢的发展机遇。不少养鱼户纷纷改建专供垂钓的养鱼池,集垂钓、售鱼、餐饮一体,养殖效益大增。但怎样才能最经济有效地管理好垂钓塘呢? 1. 清淤亮塘。垂钓塘多以养殖鲤鱼和鲫鱼为主,它们属于底栖鱼类,喜欢贴泥游动,容易弄浑池水而不易上钩,影响垂钓者兴趣。因此,改作垂钓塘时,必须彻底清除池塘淤泥,适当加深水层,这既有利于鱼类生长,又不致造成池水浑浊。

Bioturbation Effects of Benthic Fish on Soil Microorganism of Paddy Field

[Objective]The research aimed to explore the bioturbation effects of benthic fish Misgurnus anguillicaudatus on soil microorganism（microflora,biomass,and special physiological groups） of paddy field.[Method]The experiments were conducted locally and quantitatively in field,using plate count and MPN methods.[Result]In the microflora of paddy soil tested,the quantity of bacteria is the largest,followed by actinomycetes and fungus.Compared with the control paddy fields,in rice-fish paddy fields the quantities of bacteria,actinomycetes and fungus were higher,at significance level P 〈0.05,P 〈0.01,and P 〈0.01 respectively.The microbial biomass C and N in rice-fish paddy fields is remarkably higher than those in control paddy fields,both at significance level P 〈0.01;the microbial biomass P in rice-fish paddy fields is higher than that in control paddy fields,but at significance level P 〈0.05.Benthic fish promotes the growth of soil azotobacter,cellulolytic bacteria,nitrobacteria,sulfur bacteria,and ammonifying bacteria,restricts the reproduction of nitrate reducing bacteria and sulfate reducing bacteria.[Conclusion]The benthic fish had important effects on microflora,microbial biomass,and special microorganism physiological groups of paddy soil,improves the living conditions of soil microorganisms,promotes the soil fertility and bio-chemical activity,which is beneficial for improving the supply ability of soil nutrients such as N,P,S,as well as the efficiency of nutrient utilization.

Bioturbation Effects of Benthic Fish on the Phosphorus Dynamic in Overlying Water of Paddy Field

[Objective]The research aimed to investigate the bioturbation effects of benthic fish Misgurnus anguillicaudatus on phosphorus dynamic in overlying water of paddy field,as well as to explore the bioturbation mechanism.[Method]Based on simulation experiment,the phosphorus contents in overlying water were analyzed comparatively with and without Misgurnus anguillicaudatus by the using of ion chromatography and spectrophotometry.[Result]The concentrations of total phosphorus(TP),dissolved total phosphorus(DTP)and particular phosphorus(PP)in bioturbation group had no significant differences with those in control group in initial stage of experiment,and became significantly higher than control group in middle and late stages of experiment(P<0.05). The PP/TP ratios in bioturbation group were bigger than those in control group,the increase of TP concentration in bioturbation group was mainly due to the increase of PP. The ratios of dissolved inorganic phosphorus(DIP) to DTP (DIP/DTP) were significantly bigger than those in control group in middle and late stages of experiment(P<0.05).[Conclusion]The benthic fish had bioturbation effects on phosphorus in overlying water of paddy field,which increased the available phosphorus for rice growth.

闽台生产与科技合作初探

台湾渔业简讯台湾渔业的自然环境优良。台湾海峡是寒暖流交汇的地方,水温适宜,饵料充足,底栖鱼类,中、上层洄游鱼类以及贝介类多而丰富,鱼类有1600余种,虾类60多种,蟹类140种。东海岸是大洋性鱼类的洄游必经之地,本岛南北端200米等深线附近有大量的鲭、鲹、鳁、鳀,资源亦十分丰富。四十年代末期,台湾的海洋捕捞能力与大陆沿海各省相仿。

Running Head： Foram Assemblages from Three Substrata Comparison of Foraminiferal Assemblages from Three Kinds of Substrata, Durney Key, West-Central Florida, USA

As part of a project that assessed a proposed artificial reef site, this study compared benthic foraminiferal assemblages from three substrata： sediment, natural lime rock and recruitment tiles. The assemblage from sediment samples included 21 foraminiferal species representing 12 genera and was dominated by stress-tolerant taxa, especially Ammonia and Elphidium. Natural lime rock and recruitment tiles yielded 21 foraminiferal species representing 11 genera, which were dominated by miliolids. Intersample variability was characterized by ＂pulsating patches＂ as has been previously described for Florida estuaries. The predominance of stress-tolerant taxa in sediments was consistent with other observations from the site, which indicated that proposed artificial reef structures were not likely to recruit significant coral-reef biota.

钓大鱼的“秘诀”

我曾对1984～1996年《中国钓鱼》杂志“追忆篇”中的71例钓大鱼经验和1994～1996年109例《我的钓鱼照》栏目的内容,按选位、气象、看漂、提竿、遛鱼、饵料以及所钓的鱼类和使用的竿、线、钩,分别进行登记,建立目录,由表及里地进行分析。通过分析并结合本人实践,谈以下几点粗浅看法,与广大钓友商榷。

中华鲟

早在20世纪50年代中期,我国开始进行长江流域规划时,便开始了一场惊动我国学术乃至世界学术界的大争论,这场争论至今似乎还"余音绕梁",这就是后来轰动全国的"葛洲坝鱼道之争",正是这场大争论使我国大多数老百姓记住了一条鱼的名字,本文的主人翁——中华鲟(Acipenser sinensis Gray)。

金珍珠鼠的繁殖

金珍珠鼠目前是比较常见的品种,在饲育方面,没有什么特别要求,和其他鼠类异形一样,它喜欢水流大、溶氧高的环境。如果单独饲养鼠鱼,个人建议铺颗粒较小的河沙,放一块适中的沉木,再放些阴性草就可以了。把金珍珠鼠养在草缸里也是很不错的搭配。饵料方面,血虫、底栖鱼专用饵料等都可以满足它们,方便的话可以喂活饵,比如血虫。经过几年的饲养,我感到鼠鱼的消化能力很强。