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Now showing items 11-20 of 126
Density and diversity of the desert Arthropoda of Qatar
(
Qatar University
, 1997 , Article)
Density and diversity of arthropods were studied at different habitats of the Qatari desert. Diurnal sampling was conducted at two seasons of the year, the end of the dry season, at the beginning of autumn (October) in ...
Effects of gamma radiation on the activity of the, mosquito culex pipiens L. : I. Effects on the attraction of the mosquito to light, colours and host
(
Qatar University
, 1988 , Article)
The present work was carried out to investigate the effects of gamma radiation at three doses: 40, 80 and 120 Gray. On the response of the adult mosquito Culex pipieas complex when irradiated in the larval, pupal or adult ...
Biodiversity Of Helminth Parasites Of Fishes In The Arabian Gulf, With Special Reference To Digenetic Trematodes And Cestodes
(
Qatar University
, 1996 , Article)
Biodiversity of the fish fauna in the Arabian Gulf is remarkable with more than 450 species known to date in this offshoot from the Indian Ocean. The present status of our knowledge on helminth parasites of fishes in the ...
Neurosecretory Cells In Certain Earthworms Species (Oligochaete)
(
Qatar University
, 1987 , Article)
Typical Neurosecretory cells of the cerebral ganglion were studied in three oligochaete families: A. porrectodea caliginosa, Dendrodrilus rubidus: (Lumbricidae)';
Amynchas corticis : (Megascolidae); Dichogaster bolaui: ...
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 ...
Reproductive ecology of the common rock chiton Acanthopleura gemmata (mollusca: polyplacophora) in the Northwestern coast of the red sea
(
Qatar University
, 1996 , Article)
The reproductive cycle of the chiton, Acanthopleura gemmata was studied by observing the gonad indices at two localities in the North-western coast of the Red Sea, from January 1988 to December, 1989. The interrelationships ...
Effects Of Gamma Radiation On The Mating Activity Of The Mediterranean Fruit Fly. Ceratitis Capitata Weid
(
Qatar University
, 1987 , Article)
Full grown pupae of the Mediterranean fruit fly, Ceratitis capitata Weid were exposed to three doses of gamma radiation, 50 70 and 90 gray. The effects of irradiation on the fly mating activity were studied. There was no ...
Review of the genus polymorphus luhe, 1911 (acanthocephala:polymorphidae), with the synonymization of hexaglandula petrochenko, 1950, and subcorynosoma hoklova, 1967, and a key to the species
(
Qatar University
, 1992 , Article)
The position, concept and composition of the genus Polymorphus (= Profilicollis Meyer, 1931; Falsifilicollis Webster, 1948; Parafincollis Petrochenko, 1950; Subfilicollis Hoklova, 1967) are critically evaluated and a new ...
Tail Fracture Planes of Autotomy in Geckos
(
Qatar University
, 1993 , Article)
The structure of the tail facture planes was morphologically and histologically studied in two species of geckoid lizards, living in Qatar, Cyrtodactylus scaber and Bunopus tuberculatus. The fracture plane is formed of a ...
Effects of gamma radiation on the activity of the mosquito culex pipiens L. II. Effects on the sexual vitality of the mosquito
(
Qatar University
, 1988 , Article)
The effects of 3 gamma doses on the sex vitality of the mosquito Culex pipiens L. were studied after irradiation of the larvae, pupae or newly emerged adults.
No significant effect on the sex attraction was obseived when ...