丹江口水库鲤肠道寄生蠕虫群落结构与季节动态

2004年2月到2005年11月在丹江口水库库区206尾鲤(Cyprinus carpio)肠道中检获蠕虫11种,其中复殖吸虫3种,线虫5种,棘头虫2种,绦虫1种。总体感染率为45.63%,平均感染丰度为4.23±12.65,平均感染强度为9.29±17.48,其中饭岛盾腹吸虫(Aspidogaster ijimai)的总感染率(25.24%)和平均感染丰度(1.76±6.46)最大,瓣睾鲫吸虫(Carassatrema lamellorchis)的感染强度(25.00±46.68)最大。除部分平均感染丰度较低的线虫如鲤带巾线虫(Cucullanus cyprini)外,其他蠕虫的分布类型均为聚集分布,蠕虫群落多样性指数为4.63,均匀度指数为0.60,对群落多样性的季节动态分析表明,各季节群落多样性和均匀度波动较大,并无明显变化规律。每尾鲤感染蠕虫种数多在1—4种之间,所有感染的11种蠕虫中优势种为饭岛盾腹吸虫;次优势种为日本侧殖吸虫(Asymphylodora japonica)、中华许氏绦虫(Khawia sinensis)、瓣睾棘吸虫和鲤长棘吻虫(Rhadinarhynchus cyprini);非优势种为对盲囊线虫(Contracaecum sp.)、鲤带巾线虫、鲤杆咽吸虫(Rhabdochona cyprini)、黄颡刺盖线虫(Spinitectus gigi)、毛细线虫(Capillaria sp.)和木村小棘吻虫(Micracanthorhynchina motomurai)。在种间协调关系方面,鲤杆咽线虫和瓣睾鲫吸虫、鲤长棘吻虫和饭岛盾腹吸虫、对盲囊线虫和木村小棘吻虫、鲤长棘吻虫和木村小棘吻虫之间分别存在显著正关联。对优势种和次优势种蠕虫中种群的季节动态分析表明,鲤寄生蠕虫各组分的感染率和平均感染丰度存在显著的季节差异,在秋、冬季节的感染水平普遍比较高,而到春夏则急剧下降,但中华许氏绦虫无显著季节变化。     

青海湖裸鲤体腔寄生蠕虫群落研究

青海湖裸鲤体腔为三种寄生蠕虫寄生,即裂头绦虫裂头蚴,舌状绦虫裂头蚴和对盲囊缄虫的三期幼虫,这几种蠕虫不同大小的青海湖裸鲤中数量差异很大,将其看作一个组分群落,并根据其发生数量进行模糊聚类和极点排序,结果将其分为二个亚组分群落,即体长小于１５０ｍｍ的青海湖裸鲤体腔蠕虫亚组分群落和体长大于１５０ｍｍ的个体的体腔蠕虫亚组分群落。这与宿主的行为和食性改变有密切关系,舌状绦虫与另两种蠕虫间有显著负协调关系。     

鲻鱼寄生蠕虫种群和群落组成分析

从1018尾鲻鱼（Mugil cephalus L．）体内获得各类寄生蠕虫9种,共2133个虫体,其中复殖吸虫8种,棘头虫1种。寄生蠕虫总的感染率为24．4％,感染强度1－81,平均感染强度为8．8,平均密度为2．3。鲻长尾吸虫（Elonginus mugilus）和双睾原单脏吸虫（Prohaplanchnus diorchis）的感染率随着宿主体长增加而下降,而楔形单脏吸虫（Haplosplanchnus cuneatus）、长形单脏吸虫（H．elongatus）、浦里单脏吸虫（H．purii）、惠东拟囊腔吸虫（Saccocoelioides huidongensis）、粤东纵睾吸虫（Tandemorchis yuedongensis）、单睾椭宝贵虫（Elliptobursa singlorchis）和圆颚针鱼新棘吻虫（Neoechinorhynchus tylosuri）的感染率与宿主体长相关不显著（P＞0．05）。研究结果还表明,楔形单脏吸虫、长表单脏吸虫、惠东拟囊腔吸虫和浦里单脏吸虫的感染强度则随着宿主体长增加而增大,其余5种寄生蠕虫的感染强度与宿主体长相关性不显著（P＞0．05）,鲻鱼寄生蠕虫在不同月的感染率和种群数量差异,除10月与11月及8月与9月不明显外（P＞0．05）,其余月份之间的差异显著（P＜0．01）。根据感染率和种群密度变化分析,优势种为惠东拟囊腔虫;通过模糊聚类分析,将鲻鱼体内寄生蠕虫组分群落分为3个亚群,宿主体长小于70mm的寄生蠕虫亚组分群落的平均种数、优势度、感染指数、多蠕虫组分群落分为3个亚群,宿主体长小于70mm的寄生蠕虫亚组分群落的平均种数、优势度、感染指数、多样性指标、平均密度和感染强度相对较低;体长于70mm的亚组分群落下值则随体长增加而上升,而平均种数减少。     

西藏拉萨河鱼类内寄生蠕虫的种类组成及其群落特征

2004年7月对西藏拉萨河鱼类的体内寄生蠕虫进行了调查,共采集到7种鱼类,其中6种隶属于裂腹鱼亚科,1种隶属于鳅科。在这些鱼类中,共发现了2种棘头虫和1种棘头虫未定种、3种线虫、3种绦虫及异肉吸虫属(Allocreadium)的种类。它们分别是青海新棘吻虫(Neoechinorhynchus qinghaiensis)、裸鲤棘头虫(Echinorhynchus gymnocyprii)和新棘吻虫未定种(Neoechinorhynchus sp.),希蚋杆咽线虫(Rhabdochona hellichi)、对盲囊线虫(Contracaecum sp.)和胃瘤线虫(Eustrongylides sp.),东方短结绦虫(Breviscolex orientalis)、舌状绦虫(Ligula sp.)和裂头绦虫(Diphyllobothrium sp.),以及寄生裂腹鱼的异肉吸虫(Allocreadium spp.)。对青海新棘吻虫、杆咽线虫、东方短结绦虫、异肉吸虫和新棘吻虫未定种在鱼类中发育成熟的寄生虫进行了形态描述。从不同的裂腹鱼中获得的异肉吸虫属的种类未能鉴定到种;其他没有鉴定到种的寄生虫主要是利用鱼类作为中间寄主的种类,其种类鉴定则有赖于成虫的获得。迄今为止,青海新棘吻虫和裂腹鱼异肉吸虫(A.schizothoracis)仅在裂腹鱼类中被发现,可能表明裂腹鱼具有特异性的棘头虫和异肉吸虫。在所检查的7种鱼类中,除异齿裂腹鱼(Schizothorax oconnori)没有发现蠕虫外,其他6种鱼都发现了4~6种蠕虫,显示较高的物种丰富度;5种裂腹鱼蠕虫群落的Shannon-Wiener指数较高(0·6131~1·5434),而细尾高原鳅(Triplophysa stenura)的较低(0·2911);5种裂腹鱼寄生虫群落之间的相似性相对较高,为(0·1732±0·2303)~(0·3751±0·2758),而裂腹鱼与细尾高原鳅的相似性则较低,为(0·0288±0·0877)~(0·0916±0·1618)。在这些寄生蠕虫中,以鱼类为中间宿主的寄生虫种类有4种,他们都以鸟类为终末寄主,因而也在一定程度上反映了该地区的动物区系组成。     

河南济源马铁菊头蝠不同越冬期肠道寄生蠕虫群落比较

2005～2006年和2006～2007年冬季分别对济源市人工隧道马铁菊头蝠(Rhinolophusferrmequinum)越冬群消化道寄生蠕虫进行了调查并对其寄生蠕虫群落进行比较。结果显示,济源市人工隧道马铁菊头蝠越冬期消化道寄生蠕虫共有5种,2种吸虫,即济源中孔吸虫(Mesotretes jiyuanensis)和朝鲜斜睾吸虫(Plagiorchis koreanus),2种绦虫,即垦丁蝙蝠绦虫(Vampirolepis kengtingensis)和东北蝙蝠绦虫(V.toohokuensis),1种线虫,即比勒陀利亚圆钩线虫(Strongylacantha pretoriensis)。2006～2007年越冬期缺少了垦丁蝙蝠绦虫。2005～2006年越冬期总感染率为94.74%,吸虫和线虫的感染率分别为73.68%和63.18%,2006～2007年总感染率为91.30%,吸虫和线虫的感染率分别为78.26%和65.22%。两个越冬群感染平均强度和平均密度比较高的是济源中孔吸虫和比勒陀利亚圆钩线虫,优势种以济源中孔吸虫和比勒陀利亚圆钩线虫为主;所感染蝙蝠体内寄生2种蠕虫的蝙蝠个体在两个冬眠群中占蝙蝠总数的比例都比较高(约50%以上);虫体数量在30条以内的蝙蝠个体约占蝙蝠感染总数的75%以上。数量较多的朝鲜斜睾吸虫、济源中孔吸虫和比勒陀利亚圆钩线虫在越冬群马铁菊头蝠消化道内彼此间没有明显的协同或排斥作用,这3种寄生蠕虫的寄生事件应该是相互独立的。结果表明,济源市人工隧道越冬马铁菊头蝠群消化道寄生蠕虫感染率比较高,不同年度冬眠期消化道内寄生蠕虫除朝鲜斜睾吸虫的平均强度和平均密度差异显著之外,相同种类之间几乎没有差异,冬眠期蝙蝠寄生蠕虫的群落结构几乎没有变化。     

西藏羊卓雍错高原裸鲤肠道寄生蠕虫的群落生态

为研究西藏羊卓雍错Yamdrok Lake高原裸鲤肠道寄生蠕虫的群落生态,探索寄生虫与西藏高原环境和独特的鱼类宿主三者之间的相互关系,以肠道寄生蠕虫为对象,于2020年7月对180尾高原裸鲤Gymnocypris waddellii [雌性120尾,雄性60尾,全长22.20—49.20 cm,平均全长(36.76±4.18) cm,体重77.3—896.7 g,平均体重(425.92±148.27) g]进行了剖检,对群落结构和种间关系等群落生态进行了分析。羊卓雍错高原裸鲤肠道寄生蠕虫群落由5个物种构成,分别为聂氏似短节绦虫Parabreviscolex niepini、对盲囊线虫Contracaecum eudyptulae、束首线虫未定种Streptocara sp.、新棘吻虫未定种Neoechinorhynchus sp.和异肉吸虫未定种Allocreadium sp.。感染率从高到低依次为新棘吻虫未定种、聂氏似短节绦虫、异肉吸虫未定种、对盲囊线虫和束首线虫未定种。平均丰度从高到低依次为聂氏似短节绦虫、新棘吻虫未定种、束首线虫未定种、异肉吸虫未定种和对盲囊线虫。群落的Marga...     

鲻鱼(Mugil cephalus)寄生蠕虫群落生态研究

从1017尾鲻鱼（Mugil cephalus）肠道内获得寄生蠕虫9种,均为常见种类,即复殖吸虫（Digeneans）8种,棘头虫（Aacnthodephala）1种,总感染率为24.0％,平均感染强度8.73,种群平均密度2.10,其中惠东拟囊腔吸虫（Saccocoe-lioides huidongensis）的感染率、感染强度和平均密度最大。鲻鱼寄生蠕虫群落多样性指数为20193,群落均匀度指标为0.6370。鲻鱼感染寄生蠕虫种数在1－3种之间,优势种1种,为惠东拟腔吸虫;次优势种3种,分别为鲻长尾吸虫（E－longinus mugilus）、单睾椭囊吸虫（Elliptobursa singlorchis）和圆颚针鱼新棘吻虫（Neoechinorhynchus tylosuri）;非优势种5种,分别为楔形单脏吸虫（Haplosplanchnus cuneatus）、长形单脏吸虫（Haplosplanchnus elongatus）、双睾原单脏吸虫（Pro-haplosplanchus diorchis）、粤东纵睾吸虫（Tandemorchis yuedongensis）和浦里单脏吸虫（Haplosplanchnus purii）。略多于 寄生蠕虫复合群落和组分群落在一年四季中均由9种蠕虫组成,其感染率、平均感染强度和平均密度变化各有所不同,即从夏季开始,鲻鱼寄生蠕虫总感染率和各组分群落的平均密度则逐渐增高,冬季碹以一个高峰,随后逐渐下降;鲻鱼寄生蠕虫复合群落的平均密度从冬季开始逐渐下降,至秋季为最低;而圆颚针鱼析棘吻虫的感染率的四季变化与8种吸虫的变化趋势差异较大,即从春末开始增大,夏季达到最大值,随后维持在一个较高水平上,至春初则有所下降。9种寄生蠕虫的种间协调关系经卡方值测定,呈无明显协调关系。各种寄生蠕虫的种群分布均为聚集分布。     

丹江口水库三种鲤科鱼类寄生木村小棘吻虫的季节动态

作者于2004年2月至2005年2月调查了丹江口水库木村小棘吻虫Micracanthornhynchina motomurai(Harada,1935)感染三种小型经济鲤科鱼类--马口鱼(Opsariichthys uncirostris)、宽鳍(鱼鼠)(Zacco platypus)和油(粲鱼)(Hemiculter bleekeri bleekeri)的季节动态情况.在感染率和感染丰度方面,寄生于马口鱼和油(鱼鼠)的木村小棘吻虫呈现出显著的季节变化:秋冬季节感染率和感染丰度都比较高,而春夏季节比较低;与此不同的是,寄生于宽鳍(鱼鼠)中的木村小棘吻虫则全年都维持着较稳定的感染水平;木村小棘吻虫种群在三种宿主体内的总体感染丰度差异显著,但都呈聚集分布,三者的方均比与感染率和感染丰度之间无显著相关关系.     

西藏黑斑原鮡消化道寄生蠕虫的群落结构和感染情况

为了解西藏特有鱼类黑斑原鮡(Glyptosternum maculatum)消化道寄生蠕虫的群落结构和感染情况, 于2019年5—8月对383尾黑斑原鮡进行了调查。在黑斑原鮡消化道中共发现7种寄生蠕虫, 分别为深槽绦虫未定种(Bothriocephalus sp.)、原头绦虫未定种(Proteocephalus sp.)、异肉吸虫未定种(Allocreadium sp.)、新棘吻虫未定种(Neoechinorhynchus sp.)、裸鲤棘头虫(Echinorhynchus gymnocyprii)、Contracaecum eudyptulae和杆咽线虫未定种(Rhabdochona sp.), 并对各个物种的形态特征进行了描述。将黑斑原鮡按整个群体、不同性别和不同全长群体进行划分, 分别对其消化道寄生蠕虫的群落多样性和优势虫种进行分析, 并对各寄生蠕虫物种的感染情况进行统计。结果表明: 在黑斑原鮡群体中, 消化道寄生蠕虫群落的Shannon-Wiener指数为1.53, Berger-Parker指数为0.37, 优势物种为C. eudyptulae, 其感染数量、感染率、感染强度和平均丰度均为最高; 在黑斑原鮡不同性别群体中, Shannon-Wiener指数为0.26—1.57, Berger-Parker指数为0.34—0.93, 优势物种为C. eudyptulae, 雄性群体中新棘吻虫未定种也为优势虫种, 两者的感染率和平均丰度均较高; 在黑斑原鮡不同全长群体中, Shannon-Wiener指数为0.22—1.59, Berger-Parker指数为0.34—0.94, 优势物种为C. eudyptulae或新棘吻虫未定种, 感染率和平均丰度基本以二者为最高。研究进一步明确了西藏鱼类寄生虫的种类组成和寄生特点, 为研究体内寄生蠕虫的环境适应性及与宿主的协同进化提供基础资料。     

海南黄鳝体内新棘衣虫和胃瘤线虫感染初报

首次报道了海南产野生黄鳝对新棘衣虫和胃瘤线虫(幼虫)的感染情况。结果表明,新棘衣虫的感染率为46.7%,感染强度为3.80,平均丰度为1.78;胃瘤线虫的感染率为24.3%,感染强度为2.15,平均丰度为0.52;黄鳝的感染与其自身的体长有一定关系,体长190 mm以下黄鳝对线虫未发现有感染,对棘头虫的感染率亦最低,为20%,而体长191 mm以上黄鳝对棘头虫和线虫均有较高的感染率,其中体长191~220 mm黄鳝的感染率最高;棘头虫和线虫的种群在黄鳝种群中均呈聚集分布,其负二项参数k值分别为0.2539和0.2176;棘头虫和线虫的感染均以210~220 mm体长段的阳性宿主最多,分别占26.0%和34.6%。     

大黄鱼精子的超微结构

大黄鱼的精子由头产和尾部两部分组成。头部结构较为独特,其腹侧有一较大的细胞核,背部有中心粒复合体。头部的后端是袖套。细胞核的腹面稍向外突出背面则稍向内凹。细胞核中的染以质浓缩成致密的团块状。团块状的染色质之间分布着松散的纤维状染色质。植入窝位于细胞核的背部表面,由细胞核背面向内凹陷而成,呈一沟状,其走向与精子的长轴平行。     

菱臼齿兽((犭亚)目、哺乳纲)耳区的骨骼结构

本文详细描述了菱臼齿兽耳区各个部分的基本结构;并指出了耳区结构与某些啮齿类的相似性,以及中耳鼓泡组成成份与戈壁(犭亚)兽(Anagale gobiensis)的区别。     

THE BIOLOGY OF THE SOCIAL WASPS (HYMENOPTERA, VESPIDAE)

1. After defining social wasps, an outline is given of their classification and possible evolution. The Vespidae probably arose in the Malayan region at about the beginning of the Tertiary period and spread from there all over the world. They are now highly developed in South America and it is suggested that they may have reached that country over the Behring Straits, probably in two waves, the first of an ancestral Polybiine, the second perhaps of Polistes only. 2. A biief account is given of the architecture of wasps' nests which is often specific to the genus. Nevertheless, there are examples of very similar wasps making very different nests and there does not seem any case for putting an overriding value on nest-architecture in classification. While we know sufficiently well what we have to explain, only a very small beginning has been made in describing and analysing the behaviour which produces the elaborate constructions we find. 3. In the familiar Vespinae the concepts of queen and worker are well defined and the two castes are discontinuous. In genera such as Polistes the position is much more fluid, particularly in the tropical species in which it is not necessary to have a queen specialized for hibernation. Some time after nest-production, however, a queen becomes recognizable, though often more by her behaviour than by her structure. In the Polybiini, queens and workers are sometimes well differentiated and sometimes not; but in most genera and species there is more than one queen in a nest. Other types of females not so well defined and of uncertain significance also occur. In temperate climates new colonies are founded by one or a few queens; in the tropics most colonies are founded by swarms of queens and workers. 4. The main differences between queens and workers seem to be determined in the larval stage, perhaps by some secretion administered by the adults, but clearly influenced by other factors as well. The full behavioural differences between the castes are often finally established by social interactions between the adults. 5. Males tend to be produced towards the end of the life of short-lived colonies or towards the end of the reproductive cycles of longer-lived colonies. There is need for more information about in- or out-breeding patterns, particularly in relation to specific differences in the degree of sexual dimorphism. 6. Very few pheromones are recognized with certainty and only one, the queen-substance of Vespa orientalis, has been identified chemically. However, some species produce a substance from the female sixth gastral sternite (Van der Vecht's organ) which at least in one genus is an ant-repellent. Some genera of Polybiines have a somewhat similar gland on the fifth sternite which may be connected with caste-differentiation. Some wasps (Vespula) produce a footstep pheromone concerned with the recognition of the nest entrance and there is less good evidence for the existence of significant substances in the saliva of workers and in their poison glands (alarm substance). 7. Trophallaxis, or the supply of salivary secretion by the larvae to adults more or less in exchange for the food provided from outside by the foragers, seems to be essential to the colonies of Vespa since the adults have no proteases. Trophallaxis also occurs in some Polistinae but its significance there is not known. 8. Social hierarchies of ‘peck orders’ are always established amongst the adults of Polistes and play a part in determining which of several potential queens becomes the acting one. They are also important in establishing the relations of the queen to the workers and of the latter amongst themselves. A similar hierarchy occurs in Belono-gaster. Some sort of hierarchy also exists amongst adult Vespula and is probably important in relation to trophallaxis, but the hierarchies must become less definite in large colonies with hundreds of individuals, especially if there is more than one queen. 9. The principal hurdle in the evolution of social behaviour is the establishment of genes which determine that some females lay most or effectively all of the eggs while others nurse, build and forage. This evolution may only be possible amongst females which are so closely related that their genomes are almost identical. In this connexion we need much more direct field evidence on the dispersal of queens, on mating systems and the incidence of multiple insemination. It appears that, once true social life is established, considerable diversification in nest architecture and social organization may happen relatively rapidly, probably much influenced by various ecological pressures, especially predation. 10. A number of species of Vespula, Vespa and Polistes have become social parasites, in the first and the last cases without a worker caste. This seems like a wrong turning taken in the course of the normal evolution of the queen-worker relationship. 11. A brief account is given of the attempts to provide a theoretical framework for the population dynamics of wasp-colonies. 12. An account is given of the relations of wasps, chiefly as foragers, with plants and with other animals.     

THE CLADISTICS OF IDEAS (LEPIDOPTERA, DANAINAE)

Abstract— Males of Idea tambusisiana , previously unstudied, lack the only known unequivocal synapomorphy associating the constituent members of Idea . Further cladistic analyses were performed on an expanded data matrix containing two characters alternatively coded in binary and multistate form. Two topologies were obtained of which one, in which I. tambusisiana remains internal to the genus, is accepted following consideration of information content and assessment of the supporting character states. A character analysis is also performed in which the problem of ambiguous charater state assignments to the internal nodes of the cladogram is examined. Biogeographic implications of the results are discussed with respect to areas of endemism in southeast Asia, the origin of Sulawesi (Celebes), and vicariance/dispersal models intended to explain the distribution of Idea species in relation to the Makassar Strait.     

三峡水库秀丽白虾生长与繁殖生物学特征研究

2012 年11 月至2013 年10 月逐月对三峡水库木洞江段秀丽白虾的生长和繁殖生物学特征进行了研究。结果显示秀丽白虾是一年生的虾类, 寿命为1214 个月。雌性个体的平均体长(37.727.92) mm 显著大于雄性(37.086.59) mm, 具有明显的雌雄异形现象。秀丽白虾的渐近体长(L)为59.33 mm, 生长系数(K)是1.6/年, 生长方程为:Lt=59.33-e-1.6(t+0.081)。雌虾繁殖季节从4 月上旬持续至9 月下旬, 繁殖高峰期为4 月中旬至6 月中旬, 由越冬虾和当年虾两个世代的繁殖群体组成。抱卵雌虾的体长为27.0753.71 mm, 平均体长(L50)为37.06 mm。雌雄性比月变化为1.112.36, 平均为1.46, 群体中雌性个体数量显著多于雄性(P 0.001)。绝对繁殖力(FA)为31294 粒, 相对繁殖力(FR)为(11522)粒/g。绝对繁殖力与体长呈幂函数关系(FA=0.0031L2.8632, r=0.72, n=106), 而与体重呈直线关系(FA=104.63W+9.9534, r=0.79, n=106)。卵径(D)平均值为(1215102) m。为合理保护和利用三峡水库秀丽白虾种群资源, 建议加强虾类捕捞管理, 繁殖期间(49 月)禁止捕捞虾类或限制捕捞强度。       

THE FINE STRUCTURE OF THE ABDOMINAL SENSE ORGANS OF PTERIOMORPHA (MOLLUSCA, BIVALVIA)

An ultrastructural study of the abdominal sense organs (ASO)of nine species, representing all three groups Of Pteriomorpha(Mytilina, Arcina, Pteriina), is offered. In all species investigated the sensory epithelium is high (40–130µm) and possesses two predominant cell types: (a) electron-densesupporting cells with microvilli only, pigment granules, andoval distal nuclei; (b) sensory cells with round proximal nucleiand electron-lucent plasma. Their narrow processes, always bunched,reach the surface bearing long (100–300 µm) stiffcilia. Each cilium has a polarized, orientated basal foot andseveral strong roots and is surrounded by nine specialized "stereo-microvilli"forming a basal plate in connexion with the basal body. Basalcontact of the sensory cells with nervous tissue proves theirreceptive nature. Structural uniformity as well as identical innervation provideevidence for the homology of the ASO in all Pteriomorpha. Thereis no homology between sensory cells and the similar, so-called"choanocyte-like cells".