Survival Rates of Black Sea Turbot (Psetta maxima maeotica, L. 1758) Broodstock Captured by Gill Nets from Different Depths and their Adaptation Culture Conditions

A study was performed during Spring 2002 to determine the survival rates of Black Sea Turbot (Psetta maxima maeotica) broodstock captured by gill nets from different depths (20 m, 20–45 m, and 45 m) in Sinop Bay (Black Sea, Turkey) and their adaptation to culture conditions. The weight of captured females ranged between 1.6 and 5.5 kg, while males ranged between 1.1 and 3.7 kg. Within 23 h of capture the fish were transported to Çanakkale (Marmara Sea, Turkey). During transportation, the stocking density ranged from 19 to 40 kg/m³ and no mortality was recorded. At the end of the fishing operations, the survival rates were calculated for Group 1 (20 m), Group 2 (20–45 m), and Group 3 (45 m) as 24.9, 71.4, and 92%, respectively. There were significant differences (p < 0.05) between the survival rates of the groups. Eggs and sperms were obtained by hand-stripping. The mean fertilisation rate of the eggs was 3.19%. This low fertilisation rate was due to overripened eggs. At the end of adaptation period of 1 month, the survival rates of the broodstock were found to be 14.2, 45.4, and 48.3% for Groups 1, 2, and 3, respectively. No significant difference was found between the survival rates of the broodfish during the adaptation period (p > 0.05).     

Gill net selectivity for perch (Perca fluviatilis) in the Szczecin Lagoon, Poland

This paper presents the scientific basis for changes in the minimum mesh size in gill nets, from 28 to 30 mm, introduced by fishery management in Poland to limit the catch of undersized perch (those less than 17 cm total length). Experimental fishing with six different mesh sizes was performed in accordance with commercial fisheries practice. A bi-normal selection curve was fitted to the data by including the between-set variation in the model. The locations of the primary and secondary modes of the bi-normal curve on the transformed length scale (length/mesh) were estimated to be 6.95 and 7.41, respectively. The results indicated that a minimum mesh size in gill nets of 28 mm should be sufficient to ensure a low level of discards as well as protecting the interests of fishermen.     

几种常见犬猫皮肤病的诊治

以2005年6-7月宠物门诊就诊的皮肤病动物作试验对象,通过实验室检查确诊后,对犬、猫螨虫病、真菌病、趾间皮炎和湿疹常见的皮肤病进行治疗,均取得了很好的疗效。     

In vitro and in vivo effects of some pesticides on carbonic anhydrase enzyme from rainbow trout (Oncorhynchus mykiss) gills

Here we investigated the in vitro and in vivo effects of the pesticides, deltamethrin, diazinon, propoxur and cypermethrin, on the activity of rainbow trout (rt) gill carbonic anhydrase (CA). The enzyme was purified from rainbow trout gills using Sepharose 4B-aniline-sulfanilamide affinity chromatography method. The overall purification was approx. 214-fold. SDS-polyacrylamide gel electrophoresis showed a single band corresponding to a molecular weight of approx. 29 kDa. The four pesticides dose-dependently inhibited in vitro CA activity. IC₅₀ values for deltamethrin, diazinon, propoxur and cypermethrin were 0.137, 0.267, 0.420 and 0.460 μM, respectively. In vitro results showed that pesticides inhibit rtCA activity with rank order of deltamethrin > diazinon > propoxur > cypermethrin. Besides, in vivo studies of deltamethrin were performed on CA activity of rainbow trout gill. rtCA was significantly inhibited at three concentrations (0.25, 1.0 and 2.5 μg/L) at 24 and 48 h.     

糖尿病心肌病从“久病入络”论治探讨

心肌微血管病变是糖尿病心肌病的主要病理机制之一。本文就微血管和中医之“络”的结构、生理及功能等方面进行比较,认为两者具有类同性;并由此进一步探讨心肌微血管病变与“久病入络”的病理关联性,认为微血管病变可归属中医“络病”范畴,糖尿病心肌病具有“久病入络”病机特点。从而为糖尿病心肌病的治疗提供新思路。     

唐菖蒲球茎腐烂病及其综合防治研究

进行了唐菖蒲球茎腐烂病发生症状的调查与综合防治试验。结果表明 :加强栽培管理 ,培养健壮植株 ,提高抗病能力 ,结合化学药剂防治 ,能有效地控制唐菖蒲球茎腐烂病的发生与蔓延。