Table of Content

20 February 1985, Volume 5 Issue 1

Previous Issue    Next Issue

For Selected:

Download Citations EndNote Ris BibTeX

Toggle Thumbnails

Select

THE DIGESTIVE ORGANS OF THE FINLESS PORPOISE NEOPHOCAENA ASIAEORIENTALIS Ⅱ . INTESTINES, LIVER AND PANCREAS

QIAN Weijuan, LI Yuemin, Du, Lanfang, TANG Yuming

1985, 5(1):  1-9. 

Asbtract ( )   PDF (3778KB) ( )  

Related Articles | Metrics

The length of the intestines is about 7-11.2 times the body length (Table 1). The porpoise has no caecum and Paneth cells. Brunner's glands are lacking in the duodenum.Apart from the size of the plica and the thickness of the intestinal wall,there is no distinct difference between the small and the large intestines.Reticular plicae are well developed in the duodenal ampulla which has no villi in the mucosa.The lower part of the intestinal glands of the ampulla is full of mucous cells which is much less in number in the foetus. No sphincter muscle can be found between the ampulla and the duodenum proper. In the duodenum proper the ratio of the thickness of the circular muscle layer to the longitudinal muscle layer is about 3.5:1 and neither lymphtic nodules nor mucous cells resembling that of the ampulla has been found in both adult and foetus.Villi are scarce and short in the jejunum and ileum and they are absent in the colon.Goblet cells are plentiful in the rectum.The anal canal is about 5 cm.in length and its mucosa is covered with stratified squamous epithelium.The submucosa of the anal canal at about 1 cm.away from the end of the rectum possesses well-developed anal tonsils about 1.5mm, in diameter.The weight of the liver of the finless porpoise is about 2.4% times the body weight.The falciform,the round and part of the coronary ligaments are connected with the ventral surface of the liver. The hapatic veins at the terminal near the inferior vena cave are not distended in the porpoise. The interlobular vein of the liver has a wide lumen and a circular smooth muscle only 26μm.in thickness.The pancreas is located at the left side of the duodenal ampulla and on the back of the main stomach and pyloric stomach. It is enclosed in the dorsal lobe of the omentum majus.The pars papillaris ampullae of the Vate-rian ampulla at the end of the hepato-pancreatic duct with a narrow lane penetrates the circular muscle layer of the duodenum and bears the tubuloa-Iveolar glands occurred almost exclusively by the serous cells. The islets of langerhans were scattered in the lobules of the pancreas. There are three islets in one circle of the parenchym of the pancreas about 1mm.in diameter and the size of each islet is about 65 x 52 urn. The numerical ratio of A to B cells is roughly 1:2.

Select

ON THE ECOLOGY OF NYCTALUS VELUTINUS

LIANG Renji, DONG Yongwen

1985, 5(1):  11-15. 

Asbtract ( )   PDF (2511KB) ( )  

Related Articles | Metrics

The bat, Nyctalus velutinus G.M.Allen, which is distributed in South China has been observed on ecoloical characteristics, for 3 years since 1980, in Wuhu, Anhui. The results obtained are as follows:1. Most of them live in buildings together with little house-bat(Pipistrellus javanicus abramus). Their yearly and daily cycles of activity are shorter than that of the latter.2. This species mates about October. Spermatozoa are stored in the female reproductive tract throughout the winter, so that spermatozoa are found in the uterus during the period of hibernation. Ovalation occurs at the end of March or in early April; the gestation period lies probably between 50 and 60 days. Twin youngs are born at the time in mid-May and late June. The young bats reach sexual maturity during their first year of life. The epididymis of males are full of spermatozoa from October to the early April of next year. The sperm head measures 4.8 μ (range, 4.2-5.4) ×2.6 μ(1.8- 3.0)) the midpiece 15.7 n(13.4-20.0) ×1.0 μ(0.8-1.2), and the tail 47.4μ(38.7-51.0).3. They hibernate in early or mid-November and wake up in late March or early April next spring. The period of hibernation is probably 140 days. During this time (hibernation), Their tody weight, liver and fat all are decreased. Red blood cell and hemoglobin are changed apparently. From winter to spring the natural mortality of the bat is about 26.3 percent. Before mid-March the dead number is less, only occupying about 5.25 per cent (table 3).

Select

INVESTIGATIONS OF HEMOGLOBIN TYPES ON SOME RODENTS

ZHOU Yucan, JING Zengchun, WEN Deqi, HU Xiaomei

1985, 5(1):  17-23. 

Asbtract ( )   PDF (3592KB) ( )  

Related Articles | Metrics

This paper ceals with the polymorphic phenomena of hemoglobin in some wild rodents.All animals are adult.The hemoglobins of one species of lagomorphs and nine Species of rodents were analysed by means of polyac-rylamide gel disc electrophoresis.The biochemical polymorphism of the hemoglobin was found in four species,and the monomorphic type was observed in other species.The results are given in the following table. In order to make a comparative study and to disci ss the extent of hemoglobin polymc-rphism of rodents in China, in the table we induce our published materials of other four species,indicated with star.There are 6 species with polymorphism of hemoglobin from 14 analysed rodents in China,so the polymoiphic extent of hemoglobin is at least 43%. The most types of hemoglobins in ]4 species of iccents are O. curzonicce which has 7 types,and the most components in all hemoglobin tjpes are R. norvegicus which has 6 or 7 components.

Select

SOME BIOLOGICAL NOTES ON THE SOUTHWEST CHINESE VOLE (EOTHENOMYS CUSTOS)

1985, 5(1):  24-24. 

Asbtract ( )   PDF (2164KB) ( )  

Related Articles | Metrics

Select

COMPARISON OF POPULATION CHARACTERISTICS OF MERIONES UNGUICULATUS ADAPTING FARMLAND AND GRASSLAND

ZHOU Qingqiang, ZHONG Wenqin, SUN Chonglu

1985, 5(1):  25-33. 

Asbtract ( )   PDF (2725KB) ( )  

Related Articles | Metrics

This paper deals with two gerbil (Meriones unguiculatus) populations from the sites of the farmland and the grassland in Siziwang Banner north to Yin Mountains,Inner Mongolia. 243 gerbils were obtained from the farmland population and 271 from the grassland population in June, then 222 and 185 in September, respectively. The distance from one site to the other is about sixty km. and there is no topographic difference between them. Population densities in the two sites are similar.In summer (June) the body length and the body weight in all age classes of the grassland population were higher than that of the farmland population, and in autumn (September) there were no significant differences between them. It meant that from summer to autumn the growth of the gerbils in the farmland was greater than that in the grassland. In autumn the percentage of the pregnant females, the percentage of the males with enlarged seminal vesical and the testis length of the adult in the farmland were bigger than those in the grassland, respectively, and there were no significant differences in these parameters between the two populations in summer. The litter size in the grassland population was higher than that in the farmland population in summer and no significant difference was found in autumn. There was significant difference in age structure between the two populatons in autumn, the juvenile and subadult occupied 58.10% in the farmland population, while only 13.52% in the grassland populatiou and the age structure of the two populations was rather similar in summer. It meant that the reproductive intensity of the farmland population decreased slowly from summer to autumn wheras the reproductive intensity of the grassland population decreased quickly. The planting of crops provided the gerbil population in the farmland with a favourable supply of food from summer to autumn while the ploughing after harvest made the farmland an unfavourable place for living and food from winter to spring. In the grassland which was seldom disturbed by human activities the living condition of the gerbil was more stable than that in the farmland.This resulted in the differences in the adaptive characteristics between the two populations.

Select

ON THE INSECTIVORE FAUNA OF QINGHAI-XIZANG(CHINHAI-TIBETAN)PLATEAU, CHINA

ZHENG Changlin¹, WANG Sung²

1985, 5(1):  35-40. 

Asbtract ( )   PDF (2524KB) ( )  

Related Articles | Metrics

So far as the authors know,the insectivore fauna of Qinghai-Xizang plateau area comprises 2 families, 8 genera and 19 species, occupying approximately one-third of the total number of species of insectivores in China.Species considered as belonging primarily to the Palaearctic realm and to the Oriental realm occupy 21.1% and 78.9% respectively. Approximately two-thirds of the species are endemic or confine their distribution to China and mainly occur in the Himalayan-Meridian Mountain Region. This figure shows that the Region ought to be considered as a region of origination and preservation of this primitive and small-sized mammalian group. Accounts of some species and comments are given in the text.

Select

USING A FUZZY CLUSTERING METHOD TO ANALYSE THE RELATIONSHIP BETWEEN OSCILLATIONS IN THE POPULATION OF SQUIRREL (Sciurus vulgaris) AND THE PRODUCTION OF PINE(Pinus koraiensis)SEED AND A PREDICTION OF THE SQUIRREL NUMBERS

ZHOU Li

1985, 5(1):  41-55. 

Asbtract ( )   PDF (3062KB) ( )  

Related Articles | Metrics

The squirrel(Sciums vulgaris) population and the production of pine(Pi-nus koraiensis) seed have been investigated since 1960 in Yichun (Bai Jing Tang, 1981).Data covered the period of i960 to 1980.4 indexes are selected for each year, i.e.(l) population numbers of squirrel in the year before: ( 2 ) population numbers of squirrel 2 years before; (3 ) production of pine seed in the year before; (4 ) production of pine seed 2 years before. 1962-1977 data are a matrix of 4×16 order, A=(a_ij) and it is standardized in column.

Select

THE DYNAMICS OF A FEW ANIMALS DURING THE LAST THIRTY YEARS IN ILI PREFECTURE, XINJIANG UYGUR AUTONOMOUS REGION

1985, 5(1):  56-56. 

Asbtract ( )   PDF (2019KB) ( )  

Related Articles | Metrics

Select

A PRELIMINARY STUDY ON THE BULBO-URETHRAL GLANDS OF THE MALE ZOKOR(Myospalax baileyi)

DAI Kehua, WANG Xuegao

1985, 5(1):  57-65. 

Asbtract ( )   PDF (4022KB) ( )  

Related Articles | Metrics

The bulbo-urethral glands of the male Zokor (Myospalax baileyi) are compound saccular gland in pairs between the skeletal muscles of the urethral bulb near the base of the penis.84 male individuals and their bulbo-urethral glands were collected at the Haibei Research Station of Alpine Meadow Ecosystem, Men-Yuan, Qinghai from the middle of April to the end of October in 1983.Two age groups, adult and the juvenile were considered in our research.Changes in weights, sizes and microscopical structures of B.U.glands and the testis in the adult male zokor are relating to their sexual activity. The peak of the copulate period is occured in April.At this time weight and size of testis and buibo-urethral gland are largest, after April they fall off to a low levels gradually.

Select

A NEW GENUS AND SPECIES OF GLIRIDAE—Chaetocauda sichuanensis gen. et sp. nov

WANG Youzhi

1985, 5(1):  67-75. 

Asbtract ( )   PDF (3324KB) ( )  

Related Articles | Metrics

During an expedition in June 1979 to Wang-lang Natural reserve, Pinwu county, Northern Sichuan, a new genus and species of Gliridae have discovered and named Chaetocauda sichuanensis sp. nov. which may be describe as below:Chaetocauda sichuanensis gen. et sp. nov. Holotype: No.79018, adult female, collected on may 29, 1979, from Pinwucounty, Sichuan. Allotype No.79019, adult female, colleted on June 6, 1979, from the samelocality as holotype.Genus character: There is a dark chestnut around the eyes. Ears large, overing when lid forward to the eye. The terminal of tail is club shape, cover with dense hairs, and can not see the scale ring in external texture.The interorbited width is about one fifth of the greatest length of skull, incisive foramina is long, its posterior edge extend back beyond half of alveolar of M¹. The mesopterygoid fossa extend forward beyond the posterior half of alveolar of M³, so the palate bone is pressed in square shape. The mandible gracile in appearence, coronoid process are long and slender and the upper margin at the same plane as occlusal of the cheektooth, The upper incisors are deeply grooved in the center of surface and the cuting edge with a "V" shape notch. The upper molar has an endoloph which connecte with the anteroloph and situate in the inner side of the first upper molar.Diagnosis of the species: As the genus character.Description of the species: External figure, The eyes is large, vibris-sae is long and of which some longest may reach to 31mm. Tail is thicker, slightly longer than body length about 53%, The tail terminal is club shape, and the all surface cover with dense hairs, however can not see the seals ring in external texture, mammilla 2-2 = 8.Skull, Crania are characterized by zygomatic wider, rostrum shorter and the brain case more convex. The greatest length of tympanic bulla is about one third of the greatest length of skull. Incisive foramina long, interorbited wide, palate bone square shape and mandible gracil, all above have been given in genus character.Teeth, the surface of upper incisor are deeply grooved in the center, and forming a "V" shape notch on the cutting edge.Habits: This small mammals lives on subalpine forest which were mixed by coniferous and broadleaf. The nest make on small tree and the distance from ground is about 3-3.5m. Its activity were in night mainly and the contents of stomach were mixture of green plant and starch.

Select

BRIEF INTRODUCTION FOR《AN STUDY OF WILD RATS IN HOKKAIDO》

1985, 5(1):  76-76. 

Asbtract ( )   PDF (551KB) ( )  

Related Articles | Metrics

Select

NOTES ON THE YARKAND HARE

1985, 5(1):  77-79. 

Asbtract ( )   PDF (2184KB) ( )  

Related Articles | Metrics