Browsing by Subject "Zoology"
Now showing items 41-60 of 128
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Effects Of Gamma Radiation On The Sexual Attraction Of The Mediterranean Fruit Fly. Ceratitis Capitata Wied
( Qatar University , 1987 , Article)The Mediterranean fruit (ly, Ceratitis capitata Weid, was gamma irradiated as full grown pupae with 50, 70 and 90 gray. The produced adults were examined for their attractiveness to the non irradiated (normal) other sex. ... -
Electron microscopic and autoradiographic analysis of the distribution of the vagus nerve in the ferret stomach
( Qatar University , 1999 , Article)In this study, tritiated leucine was injected into the vagal dorsal motor nucleus after acute and chronic partial vagotomy. The method of sampling of the stomach, application of % 2 test and the analysis of the electron ... -
Embryonic Development Of The Olfactory Organ In Mice
( Qatar University , 1994 , Article)The development of the olfactory organ in the prenatal stages of mice (Patch/normal Balb/c) was studied. Eight stages were selected for this study; they are 9,10,11,12,13, 14,16 and 18 days of gestation. At 9 days of ... -
Factors Governing Mosquito Susceptibility To Bacillus Sphaericus Strains
( Qatar University , 1992 , Article)Three lyophilized strains of Bacillus sphaericus (1593-4, 2297 and SSII) were tested against four different mosquito species. Culex pipiens larvae demonstrated the highest level of susceptibility towards the 3 B. sphaericus ... -
Feeding on intertidal microbial mats by postlarval tiger shrimp, Penaeus semisulcatus De Haan
( Springer Berlin / Heidelberg , 2009 , Article)A series of experiments investigated the potential role of microbial mats in nutrition of the early settlement stages of Penaeus semisulcatus. From 3 days post-metamorphosis, the microbial mat supported high growth and ... -
The First Record of Philometra lateolabracis Yamaguti, 1935 (Nematoda: Spirurida; Philometridae) from teleost fishes of the Arabian Gulf
( Qatar University , 1999 , Article)Philometra lateolabracis Yamaguti, 1935 was collected from the ovaries of Liza macrolepis (Mugilidae), Epinephelus tauvina (Serranidae), E. areolatus (Serranidae), Trichiurus haumela (Trichiuridae), Psettodes erumei ... -
Fish diversity in correlation with some environmental factors in the mangal of two protectorate areas, ras muhammed and nabq on the red sea in egypt.
( Qatar University , 1997 , Article)The present investigation is an attempt to study the fish diversity at five sites of the mangrove forests (Mangal) in two famous protectorate areas : Ras Muhammed and Nabq on the Red Sea in Egypt. The present investigation ... -
Gonadal Development Of Lead Intoxicated Rat Embryos
( Qatar University , 1987 , Article)Pregnant rats injected with 60ju,g lead nitrate/gm body weight on day 8 of gestation showed a significant fetal resorption and reduced size of gonads on day 13.5 gestation. Incidence of fetal death and fetal resorption ... -
Haemogregarines of geckos in egypt, together with a description of haemogregarina helmymohammedi n.sp.
( Qatar University , 1995 , Article)Three species of geckos collected from various localities in Egypt were examined for protozoan blood parasites. Haemogregarines were reported in all the three species of geckos. Problems of the generic and specific ... -
Harmful Effects Of Sea Water Administration On Kidney Structure And Function
( Qatar University , 1992 , Article)Ratlus rattus received oral int'usiuii „; 3 ml of sea water for 5 consecutive days. Certain blood parameters and kidney structure and function were studied 24 hours and one week later. Hematocrit. plasma osmolality, sodium, ... -
Helminth parasites of fishes from the arabian gulf 1. Preliminary general survey of fishes mainly from qatari waters
( Qatar University , 1986 , Article)The present work reports the results of a preliminary survey on the helminth parasites of some fish, caught mainly from Qatari waters in the Arabian Gulf. The incidence of helminth infections varied in various fish families, ... -
Helminth parasites of fishes from the arabian gulf 2 . the digenetic trematode genera Hamacreadium linton, 1910 and cainocreadium Nicoll, 1909
( Qatar University , 1986 , Article)The status of the related digenetic trematode genera Hamacreadium Linton 1910 and Cainocreadium Nicoll, 1909 is briefly reviewed. Hamacreadium Linton 1910 is described from Lutjanus fulviflamma and L. russelli. Cainocreadium ... -
Helminth parasites of fishes from the arabian gulf 3. On pseudoplagiopobus microrchis, yamaguti, 1942 (digenea: opecoelidae)
( Qatar University , 1987 , Article)The trematode genus Pseudoplagioporus Yamaguti, 1938 is briefly reviewed. P. microrchis Yamaguti, 1942 is redescribed from Lethrinus lentjan and L. nebulosus caught from Qatari waters in the Arabian Gulf. This is the first ... -
Helminth parasites of fishes from the arabian gulf: 4. On allacanthochasmus lutjani n.sp. And metadena leilae nagaty, 1957 (digenea: cryptogonimidae)
( Qatar University , 1988 , Article)Allacanthochasmus lutjani n.sp. is described from Lutjanus fulviflamma caught from Qatari waters in the Arabian Gulf. It differs from other species of the genus, mainly by the shape and position of the ovary, presence of ... -
Helminth parasites of fishes from the arabian gulf: 5. On helicometrina qatarensis n. Sp. (digenea: opecoelidae) and stephanostomum nagatyi N. SP. (digenea: acanthocolpidae); parasites of Epinephelus Spp. from Qatari Waters
( Qatar University , 1988 , Article)Helicometrina qatarensis n. sp. is described from Epinephelus tauvina and E. summana. It differs from other species of Helicometrina which have 9 testes in the body shape, position of genital pore, distribution of vitellaria ... -
Histochemical Studies On argas (Argas) Hermanni (Ixodoidea: Argasidae) Salivary Glands
( Qatar University , 1994 , Article)Basic proteins, tryptophan, tyrosine, free NH2 and SH groups, general carbohydrates, glycogen, acid mucopolysaccharides and lipids were investigated during nymphal and adult Argas (Argas) hermanni Audouin development. In ... -
Histological And Histochemical Studies On The Decidua And The Uterine Glands During Early Pregnancy In The Rat (Rattus rattus)
( Qatar University , 1986 , Article)Histological and histochemical studies were carried out on the decidua and uterine glands in the uteri of pregnant rats 'Rattusrattus' between 129 hours post.-coitum (p.c) and day nine of pregnancy. Decidualization was ... -
Histological And Histochemical Study Of The Digestive Tract Of The Worm-Like Reptile*, Diplometopon Zarudnyi (Squamata)
( Qatar University , 1996 , Article)The structure of the digestive tract of Diplometopon zarudnyi was studied by means of light microscopic histology and PAS reaction. The oesophagus is lined with stratified columnar epithelium while the stomach is lined ... -
Histological observations on the changes in Thyroid activity in the geckonid lizard, bunopus tuberculatus, during tail regeneration
( Qatar University , 1994 , Article)Histological observations on the thyroid activity during differentphases of tail regneration in the geckonid lizard, Bw/jo/ms tuberculatus, have indicated a decreased thyroid activity during wound-healing phase. During ... -
A histological study on the neuroendocrinal system of a coleopterous insect, cy3ister tripunctatus africanus cast.
( Qatar University , 1983 , Article)Four different types of neurosecretory cells were identified in the brain of the adult water beetle, Cybister tripunctatus africanus Cast. These cells were identified into A, B, C, & D types according to their morphological ...