Use of tetracycline hydrochloride and alizarin complexone for immersion marking black rockfish Sebastes schlegelii

We tested the utility of chemical marking techniques in the juvenile black rockfish Sebastes schlegelii. Juveniles(30–40 mm total length) were immersed in a range of tetracycline hydrochloride(TC) solutions at concentrations ranging from 300 to 500 mg/L, and alizarin complexone(ALC) solutions at concentrations ranging from 200 to 400 mg/L in filtered sea water(salinity of 30) for 24 h, respectively. Otoliths(sagittae, asteriscus), scales, fin rays(dorsal, pectoral, ventral, anal, and caudal fin rays), and fin spines(dorsal, ventral, and anal fin spines) were sampled and used to detect fl uorescent marks after a 60-day growth experiment. With the exception of 300 mg/L TC, acceptable marks were produced in the otoliths and fin spines by all concentrations of TC and ALC. In particular, we observed clearly visible marks in the sagittae, asteriscus, and fin spines under normal light at concentrations of 200–400 mg/L, 250–400 mg/L, and 250–400 mg/L ALC, respectively. Scales and fin rays had acceptable marks at much higher concentrations(≥350 mg/L TC, ≥250 mg/L ALC for scales and ≥350 mg/L TC, ≥300 mg/L ALC for fin rays). The best mark quality(i.e., acceptable marks were observed in all sampled structures after immersion marking) were obtained following immersion in TC at between 350–500 mg/L, and ALC between 300–400 mg/L. In addition, there was no significant difference in survival and growth of TC and ALC marked fish compared to their controls up to 60 days post-marking( P 0.05).     

贵州省铜仁地区温泉分布及成因浅析

铜仁地区地表出露温泉较多,地热资源极其丰富。本文对铜仁地区温泉分布及成因进行统计分析后知,其分布受地层、地质构造及地貌等因素的影响,具有地热水形成的储层、盖层、导水通道及热源的良好条件。     

2006年1月漯河市暴雪天气过程的诊断分析

利用常规探空和地面资料以及NCEP再分析资料，对2006年1月漯河暴雪过程进行了诊断分析，结果表明：高空阶梯槽的形成和维持，为这次强降雪过程提供了有利的环流背景，中低空低涡切变线是主要影响系统；冷平流的持续使近地面层气温降至0℃以下，有利于雪的形态维持；高层辐散与低层辐合的耦合，使上升运动加强；低空急流输送了充沛的水汽，大气中水汽处于饱和状态有利于提高降水的转化率。     

漯河市高温天气模型及预报

利用1960～2001年历史资料,分析了漯河市干热型高温天气形势和地面要素特征,并利用数值预报产品,建立了干热型高温天气模型和预报方程.方程对≥37 ℃高温天气的预报历史拟合率78.3%,对≥38 ℃的高温天气无漏报.     

空中电荷在对流性天气预报中的指示性

对2002～2003年6～8月闪电定位仪探测的空中电荷活动情况进行了统计分析，揭示了空中正负电荷的强度、密度、移向对对流性天气预报的指示性，并用前期电荷活动情况作为预报因子，建立对流性天气预报指标。     

毛管压力参数的初步研究与应用

用毛管压力资料确定储层润湿相饱和度时，不可避免地要涉及到地下油水界面张力和润湿接触角的合理确定问题。应用济阳坳陷的实测资料，讨论了地下原油极性组分含量及油藏温度对油水界面张力的影响，地层温度、油水界面和张力、岩性、物性及油不密度差对油水润湿角的影响。     

Vertebral deformities in hatchery-reared and wild-caught juvenile Japanese flounder,Paralichthys olivaceus

The present study compared vertebral deformities of hatchery-reared and wild-caught juvenile Japanese flounder,Paralichthys olivaceus.A total of 362 hatchery-reared flounder(total length 122.5-155.8 mm) were collected from three commercial hatcheries located in Yantai,East China,and 89 wild fish(total length 124.7-161.3 mm) were caught off Yangma Island near Yantai City(37°27′N,121°36′E).All the fish were dissected,photographed,and images of the axial skeleton were examined for vertebral deformities.Compared with wild-caught flounder in which no deformed vertebrae were detected,48(13.3%) hatcheryreared fish had deformed vertebrae.The deformities were classified as compression,compression-ankylosis,and dislocation-ankylosis.The vertebral deformities were mainly localized between post-cranial vertebra 1and 3,with vertebrae number 1 as the most commonly deformed.The causative factors leading to vertebral deformities in reared Japanese flounder may be related to unfavorable temperature conditions,inflammation,damage,or rupture to the intervertebral ligaments under rearing conditions.Furthermore,no significant difference in the total number of vertebral bodies was observed between wild-caught(38.8±0.4) and hatchery-reared flounder(38.l±0.9)(P0.05).However,the number of vertebral bodies of hatchery-reared and wild-caught flounder ranged from 35 to 39 and from 38 to 39,respectively.     

Henry’s law constant for phosphine in seawater: determination and assessment of influencing factors

The Henry’s Law constant (k) for phosphine in seawater was determined by multiple phase equilibration combined with headspace gas chromatography. The effects of pH, temperature, and salinity on k were studied. The k value for phosphine in natural seawater was 6.415 at room temperature (approximately 23°C). This value increases with increases in temperature and salinity, but no obvious change was observed at different pH levels. At the same temperature, there was no significant difference between the k for phosphine in natural seawater and that in artificial seawater. This implies that temperature and salinity are major determining factors for k in marine environment. Double linear regression with Henry’s Law constants for phosphine as a function of temperature and salinity confirmed our observations. These results provide a basis for the measurement of trace phosphine concentrations in seawater, and will be helpful for future research on the status of phosphine in the oceanic biogeochemical cycle of phosphorus.     

漯河市高温天气模型及预报

利用1960～2001年历史资料,分析了漯河市干热型高温天气形势和地面要素特征,并利用数值预报产品,建立了干热型高温天气模型和预报方程.方程对≥37 ℃高温天气的预报历史拟合率78.3%,对≥38 ℃的高温天气无漏报.     

基于图表及统计方法的水化学综合分析

某拟建工程位于四川乐山市红层地区。根据工程建设前水文地质勘查中获取的水化学资料,结合当地自然地理特征、地质及水文地质调查资料,应用图表和聚类分析方法,分析了该研究区水化学基本特征及形成因素。同时对比了两种水化学分析方法。分析结果认为,研究区水化学特征具有相似性,但不同地形及地质条件控制下的水化学特征又具有一定差别;在水化学特征较为相似的地区,统计分析结果比图表分析结果具有更强的可读性。