抗黄斑星天牛杨树品种选择研究

针对黄斑星天牛对杨树人工林造成的严重危害，通过引进46个品（系）的对比筛选，最终选择出了陕林3号等6个抗天牛杨树品种，并在平凉市泾河川区进行了造林示范。为西北地区天牛危害区杨树品种更替提供了可靠依据。     

黄斑星天牛硫酰氟检疫熏蒸技术研究

黄斑星天牛 (Anoplophoranobilis)硫酰氟熏蒸的毒力试验结果说明 ,当熏蒸时间为2 4h ,4.4℃、1 0 .0℃、1 5.5℃和 2 1 .1℃条件下推算出死亡机率值 9要求的CT值分别为70 0 4.2 0、3 2 96.97、974.63和 52 7.0 4g .h/m3;当熏蒸时间为 48h ,4.4℃和 2 1 .1℃分别为 2 82 8.2 2和 50 5.45g .h/m3。室内验证试验中 ,1 5.5℃和 2 1 .1℃投药剂量为 1 0 4g/m3,能够全部杀灭杨树携带的黄斑星天牛幼虫、蛹 ,以及芳香木蠹蛾东方亚种 (Cossuscossusorientalis)和杨干透翅蛾 (Spheciasiningensis)幼虫 ;而在 1 0℃以下 ,黄斑星天牛或芳香木蠹蛾东方亚种和杨干透翅蛾幼虫没有完全死亡。     

光肩星天牛和黄斑星天牛杂交研究

在野外对光肩星天牛和黄斑星天牛成虫相互交配进行了调查 ,同时于野外铁纱笼内进行了两种天牛成虫之间的交配试验 .结果表明 ,野外自然条件下两种天牛成虫间都可相互交配 ,其中光肩星天牛♀×♂的比率占34 4 % ,黄斑星天牛♀×♂占 1 3 3% ,淡黄型♀×♂占 1 0 6 % ,黄斑星天牛♀×光肩星天牛♂占 1 6 7% ,光肩星天牛♀×黄斑星天牛♂占 1 0 6 % ,其它类型间的相互交配占 1 4 4 % .铁纱笼内黄斑星天牛♀与光肩星天牛♂交配 ,产生的后代成虫 ,鞘翅表现为白斑、黄斑和淡黄斑 3种类型 ,光肩星天牛♀与黄斑星天牛♂交配后代毛斑为黄斑和淡黄斑 ,黄斑星天牛♀♂交配的后代为淡黄斑和黄斑 .利用这些后代成虫进行再交配试验 ,已得到后代幼虫 1 31头 .根据这些结果及有关两者的生物学、行为学和形态特征观察 ,我们认为它们很可能是一种的不同型     

凡纳滨对虾-草鱼混养模式与对虾单养模式的池塘水质动态及产出效果对比研究

在调查珠江三角洲地区凡纳滨对虾-草鱼混养模式的基础上.于2010年3-6月对比研究了以凡纳滨对虾(Litopenaeus vannamei)为主养对象的低盐度土池混养草鱼(Ctenopharyngodon idellus) A(Carassius auratus),鲢(Hypophthalmichthys molitr...     

Alternative protein blends as a replacement for fish meal in diets for white seabass,Atractoscion nobilis

An 8‐week feeding trial was conducted to determine the effectiveness of replacing fish meal (FM) with blends of alternative proteins in diets for white seabass (WSB, Atractoscion nobilis) at a starting weight of 5.6 g. Five diets were formulated with 400–440g kg^?1 crude protein (380g kg^?1 digestible). These included a high 520g kg^?1 FM control diet, a series of three diets with a sequential replacement of FM containing 410g kg^?1, 510g kg^?1 and 630g kg^?1 of a soy‐based protein blend (SPC) and 200g kg^?1, 100g kg^?1 and 0g kg^?1 FM, respectively and a fifth diet containing 550g kg^?1 of a corn‐based protein blend (CGM) and 100g kg^?1 FM. Survival was highest in the FM control group at 99% but all other performance measures (weight gain, feed conversion ratio, specific growth rate and protein retention efficiency) were worse than the other treatment groups. Weight gain reached a maximum of 595% in the SPC 200g kg^?1 FM treatment group. Performance decreased as inclusion of the soy‐based protein blend increased. The CGM treatment performed comparably to the SPC 100g kg^?1 FM treatment among all measures, except for survival, which was higher in the CGM 100g kg^?1 FM treatment. With nutrient levels and alternative protein blends used in this study, FM can be reduced to 100g kg^?1 of the diet for WSB without reductions in performance.     

Growth of the fan mussel Pinna nobilis (Linnaeus, 1758) (Mollusca: Bivalvia) in experimental cages in the South Adriatic Sea

Juveniles of the fan mussel Pinna nobilis were collected in Mali Ston Bay from October to December 2006. Cages with juveniles were placed at three depths: 1, 3 and 5 m. At the end of a 2‐year growth period at 1 m depths, the average length was 244.1 ± 22.9 mm, at 3 m depths, specimens averaged 244.0 ± 25.3 mm, and at 5 m depths, the average length was 231.1 ± 22.5 mm. The average monthly growth of shell length for the total experimental period was 8.7 ± 5.3, 8.4 ± 4.5 and 7.6 ± 4.4 mm, at 1, 3 and 5 m depths respectively.     

赤眼鳟()与鳙()杂交子代生物学特性

对赤眼鳟(Squaliobarbus curriculus)(♀)和鳙(Aristichthys nobilis)(♂)的杂交子一代(杂交F1)与其父母本F1一、二龄鱼的生长性能进行比较,分析了杂交F1的形态、染色体组型、倍性和红细胞大小。养殖环境分别为网箱和池塘。结果表明:该杂交组合双亲的配合力很高,连续两年试验受精率平均为59.65%,孵化率为84.93%,畸形率为4.09%,两年间分别获得鱼苗1.3万和7万尾。通过生长对照试验,杂交F1一龄鱼网箱试验生长速率比母本慢25.32%,池塘试验比母本快41.80%,二龄鱼池塘试验生长速率比父母本都慢。测定了26项形态学性状,有23项偏向母本,3项偏向父本。染色体计数和红细胞长径测定,杂交F1有二倍体和三倍体两种类型,分别是2n=48,16m+28sm+4t,NF=92和3n=72,36m+30sm+6t,NF=138。测定了88尾杂交F1红细胞长径,其中二倍体71尾,占80.68%;三倍体17尾,占19.32%。本研究旨在探讨鱼类远缘杂交的可能性和培育成养殖新品种的应用前景,并为鱼类远缘杂交理论提供基础资料。     

焉耆地区几种混交林对黄斑星天牛的抗虫性研究

在新疆焉耆县的黄斑星天牛危害区域营造了4种混交试验林,以观测研究不同混交林(纯林)对黄斑星天牛的抗性。结果表明:多树种混交林比纯林对黄斑星天牛危害的抗性强;在几种混交林中新疆杨与箭杆杨混交林抗虫性较好。     

黄斑星天牛和光肩星天牛幼虫两种同功酶的测定

对黄斑星天牛和光肩星天牛的血清蛋白同功酶和过氧化物同功酶测定结果,可以看出两种天半的这两种同功酶种间差异表现在Ａ区１～２条酶带宽窄、深浅的差异,而总体的差异不大,说明这两种天牛是近缘种类。     

黄斑星天牛循环系统的形态解剖

黄斑星天牛(Anoplophora nobilis Ganglballer)循环系统属开放式循环,由一条纵贯背血窦中央的背血管组成。幼虫、蛹和成虫的背血管均包括心脏和动脉两部分。心脏由一系列稍膨大的心室组成,心室的数目与腹部体节的数目基本一致,幼虫为8个,成虫、蛹为6个。每个心室两侧各有一对翼肌以扇形的尖端部分附着于体壁的节间膜上,蛹的翼肌肌丝不发达。