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Now showing items 61-70 of 126
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 ...
Night Distribution Of Certain Species Of Coleoptera As Indicated By Captures In A Light Trap At Quena
(
Qatar University
, 1984 , Article)
The night distribution of nineteen species over a whole trapping period can be considered under the following headings:
a. Early flyers b. Species with two peaks of activity. The effect of light of low intensity,
temperature ...
Scanning Electron Microscopy Of The Egg And The Second Stage Larva Of Toxocara Vitulorum
(
Qatar University
, 1996 , Article)
The surface topography of the egg and 2nd stage larvae of the nematode Toxocara vitulorum are described by scanning electron microscopy. The eggs are oval and their surfaces are characterized by the presence of distinct ...
Population Ecology of the Intertidal Sea Star Asterina Burtoni Gray (Asreroidea: Echinodermata) In the Wakrah Bay, South East Of Qatar
(
Qatar University
, 1995 , Article)
The abundance, distribution and population age structure of the sea star Asterina burtoni Gray were investigated in the intertidal area of the Wakrah Bay, South East Qatar Peninsula from October, 1993 to January, 1994. The ...
Effects of gamma radiation on reproduction, Mating competitiveness and sperm activity of Callosobruchus chinensis (l.)
(
Qatar University
, 1994 , Article)
The effects of gamma irradiation at different doses on the adult stage of Callosobruchus chinensis L. were studied. Adult fecundity and fertility decreased by increasing the radiation dose and effects of the treatment were ...
A review of the trematode genera Haplosplanchnus Looss, 1902 and Prohaplosplanchnus Tang and Lin, 1978 with redescription of three species from the mullet in Libya
(
Qatar University
, 1997 , Article)
The trematode genera Haplosplanchnus Looss, 1902 and Prohaplosplanchnus Tang Lin, 1978 were reviewed. H. indica Gupta and Ahmad, 1979, H, mugilis Nahhas and Cable, 1964 and P. diorchis Tang and Lin, 1979 were redescribed ...
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 ...
Some Aspects Of Camouflage In Animals
(
Qatar University
, 1989 , Article)
Camouflage is the principal device by which vulnerable animals escape predation. The attention of potential predators can be avoided by protective resemblance -mimicking an inedible object such as a seed or leaf. Concealment ...
Photoperiod and salinity effects on survival and some blood parameters in female Bufo regularis
(
Qatar University
, 1986 , Article)
This study, investigates the effect of different salinities injected (30, 70 and 100 % sea water) and photoperiods (L:D/8:16,L:D/12:12 and L: D / 16 : 8 ) on female Bufo regularis (1) survival rate, (2 ) oxygen and carbon ...
Paragorgorhynchus aswanensis n.sp. (acanthocephala: Echinorhychidae): an intestinal parasite of some fishes from aswan high dam lake in upper egypt
(
Qatar University
, 1990 , Article)
Paragorgorhynchus aswanensis n.sp. is described, both by light and scanning electron microscopy, from Lates niloticus,, Clarias lazera, Bagrus bayad, B. docmac, and Tetraodon fahaka, caught from the Aswan High Dam Lake in ...