枣步曲幼虫空间分布型及抽样技术的研究

通过ＩｗａｏＸ－Ｘ回归测定，枣步曲幼虫的空间分布为奈曼－Ａ型分布或波松－二项分布，分布的基本成分为致密的个体群，个体群间及个体群内的分布均为随机分布，个体群的面积小于或等于１株树，对于估值抽样提出了两种方案，即整体抽样和层抽样，前者以随机抽样和棋盘式抽样为优，并给出了理论抽样公式，后者以最下层抽样代替整株抽样估计种群密度，可以提高抽样效率，降低抽样费用，且估计精度能达到科研与生产的要求，最后给出Ｉ     

鞭角华扁叶蜂滞育期幼虫空间分布型及抽样技术研究

鞭角华扁叶蜂滞育期幼虫空间分布型及抽样技术研究＊郑永祥崔相富吴道圣杨胜利陈绘画关键词鞭角华扁叶蜂、滞育期幼虫、空间分布、抽样技术鞭角华扁叶蜂［Ｃｈｉｎｏｌｙｄａｆｌａｇｅｌｉｃｏｒｎｉｓ（Ｆ．Ｓｍｉｔｈ）］属膜翅目（Ｈｙｍｅｎｏｐｔｅｒａ）、扁叶蜂科...     

辽宁三种松毛虫越冬幼虫过冷却点的研究

松毛虫越冬幼虫在越冬期间的存活率,除了取决于种的生物学特性而外,还取决于低温的强度、出现的时间、持续时间的长短等。冬季的最低温度不仅是决定三种松毛虫分布地区的重要原因,而且左右着松毛虫数量的变化。决定着冬眠幼虫能否存活和存活多少。尤其是越冬开始及越冬结束时,气候变化,影响最为显著。     

Identification and characterization of peptides binding AgEG1 from a phage display library

Endoglucanases are the main cellulolytic enzymes digestion as well as its good kinetic properties make it an attractive of Anoplophora glabripennis. Their high activities in cellulose target for development of cellulase inhibitors. In this study, random pepfide phage display technology was employed to identify peptides that bound the AgEG1, a member of endoglucanase isozymes. Phage clones with peptide LPPNPTK and XPP （X is residue T, L, A or H） motif frequently occurred in the selected phage population and showed a higher phage recovery than other clones. Peptide LPPNPTK was chemically synthesized and characterized tor its binding activities to AgEG1. The synthetic peptide exhibited high specificity for AgEG1. The peptide LPPNPTK has the potential to be developed into inhibitors of the endoglucanase of A. glabripennis.     

烟田烟青虫和棉铃虫幼虫体色变化及遗传规律初步研究

通过田间调查和室内饲养，将烟田混合发生的烟青虫和棉铃虫幼虫体色变化归纳为７种基本类型，其中在黄绿色型中烟表虫数量较多，占６３．９％；在绿褐色型中棉铃虫占９３．４％其它几种体色类型的幼虫均为棉铃虫。     

Environmental factors influencing larval sprat Sprattus sprattus feeding during spawning time in the Baltic Sea

The management of Baltic sprat is challenged by highly variable recruitment success and hence large stock fluctuations. Recent studies have identified the larval and early juvenile life stages to be critical for the survival rate of a sprat year class. Although prey abundance was found to be linked to larval survival success, an analysis identifying the functional relationship and relative importance of other environmental factors is still missing. Sprat larval feeding was investigated in 2002 during three cruises, covering the main spawning time in the Bornholm Basin, Baltic Sea. The aim of the study was to identify the key environmental factors determining the feeding success of larval sprat taking their potential interactions explicitly into account. An extension of generalized additive models (GAMs) was adopted that allows the inclusion of interaction terms in a non‐parametric regression model. The final model of sprat larval feeding success explained ～80% of the variance in the data and was based on the following environmental factors: bottom depth, cubed wind speed as proxy for small‐scale turbulence rates, degree of cloudiness as proxy for light conditions and prey density in combination with a feeding period–cloudiness interaction term. Our study demonstrates that the feeding success of sprat larvae in the Baltic Sea is controlled by a number of simultaneously acting key environmental factors.     

裂臀瓢虫属3种幼虫的形态记述（鞘翅目：瓢虫科）

简述了裂臀瓢虫属Ｈｅｎｏｓｅｐｉｌａｃｈｎａ Ｌｉ的研究情况,编制了该属中国已知幼虫种类检索表,首次描述了该属３种幼虫形态,幼虫标本保存于南京农业大学昆虫标本室。     

Ontogeny of pancreatic enzymes in larval red drum Sciaenops ocellatus

The growth, survival and trypsin, lipase and amylase activities of red drum larvae were measured in two experiments. For the first trial, a group was fed live prey only (L) and another group was fed a combination of a microparticulate diet (MPD) and live food (L-MP). For the second growth trial a group fed the MPD only (MP) and a starvation group (ST) were examined in addition to the L and L-MP treatments. Enzyme activities of live prey were measured to estimate their possible contribution to larval digestion. No significant ( P  > 0.05) differences in final size and survival were observed between treatments L and L-MP. Larvae subjected to starvation or fed the MPD diet alone were smaller than treatments fed live prey and did not survive past days 5 and 14, respectively. Trypsin, lipase and amylase activities were detectable at hatching. No significant differences ( P  > 0.05) in total enzyme activities among treatments were observed before day 14. Specific activity of trypsin, lipase and amylase peaked on day 3 (prior to first feeding) and subsequently decreased. For trypsin, the percentage of enzyme activity potentially attributable to ingested prey increased with age to a maximum of 17%. For lipase and amylase this fraction was less than 5% throughout the study, except on day 8 (12% and 24%, respectively). The lack of significant differences observed in the activity of digestive enzymes among treatments suggests that dietary regime, availability of prey and possible effects of exogenous enzymes did not significantly influence enzyme activity. Therefore, the lower growth rate observed in the L-MP, MP and starved treatments cannot be attributed to low digestive enzyme production of the enzymes measured. It is more likely that the MPD failed to supply the required nutrients for adequate development.     

Modelling the transport of lobster (Homarus americanus) larvae and postlarvae in the Gulf of Maine

We used a coupled physical–biological model to examine potential distances between hatching and settlement locations for lobsters in the Gulf of Maine. The physical model is based on a finite-element mesh and climatological averages of the seasonally evolving temperature and density fields. Larval trajectories from coastal and offshore hatching sites (21–224 m deep) were calculated for early, middle and late-season hatching by coupling temperature-dependent development rates and depth (the biological model) to the circulation. Model results showed large spatial differences in larval development times (from 18 to 38 days) and distances transported (19–280 km) for the early hatch. Development time and transport decreased markedly by mid-season at most sites, but strong spatial differences persisted. The eastern Maine coast appears to experience stronger removal and less resupply of larvae than other regions, consistent with observed lower recruitment. Inverse solutions of the model for larvae arriving in mid-coastal Maine indicate that they originate from a broad section of the eastern coast 'upstream', with those nearest the shoreline generally travelling the shortest distances. The postlarval stage is neustonic (living near the surface), and a simple inverse model demonstrates that a diurnal coastal sea breeze can contribute substantially to inshore movement during this final planktonic stage. Thus, offshore reproduction may be linked to inshore recruitment.     

培养蚊子幼虫作为日本对虾鲜活饵料的研究

以猪肝均浆液作为培养基,研究蚊子幼虫作为日本以虾鲜活饵料的价值。同时,试验蚊子幼虫进行规模化培养的可行性和探讨蚊子幼虫在净化水质中所起的作用。