t_gad_2000

Prof. Tarek G. Ismail

Professor - Professor

Faculty of science

Address: Zoology Department - Faculty Of Science - Sohag University

10

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2020-07-08 20:11:20
Research Project" course (470Z)
. The "Research Project" course (470Z) was sent to the students through the group Facebook page. The date for discussing the reports will be held on after finishing your final exams.... Read more

2018-09-17 18:23:31
Etiquette of lecture or lab
ETIQUETTE OF LECTURE OR LAB: IN MY LECTURES ABOUT BIOLOGICAL EVOLUTION .....REMEMBER * Do not be late for lecture or lab. * Turn your phone off. * Stay awake. * Do not talk during lecture or lab. * Do not leave before the lecture or lab period is over. * Do not anticipate the end of lecture or lab and ... Read more

2021-12-13 21:44:53 | Keywords Body shape variations,
Seasonal shape variations, ontogenetic shape changes, and sexual dimorphism in a population of land isopod Porcellionides pruinosus: a geometric morphometric study
BACKGROUND: Isopods shape features are sensitive and respond to several selective pressures which may result in variations of these features. These pressures might reflect the heterogeneity of the environment where an animal lives. Land isopods _Porcellionides pruinosus_were collected from an agricultural field. Landmarks geometric morphometrics was applied to evaluate its shape changes during two different seasons. The present work aims ... Read more

2021-12-13 21:40:55 | Keywords Geometric morphometric,
A geometric morphometric analysis of heterochely in the Red Sea hermit crab Clibanarius signatus and their developmental stability and modularity
Geometric-morphometric analysis is growingly used to quantify/analyze biological forms and discriminate among subtle variation in shape. The hermit crab “_Clibanarius __signatus__”_ showed subtle heterochely; therefore, geometric morphometric analysis helps to determine visually these shape changes. Individuals of “C. signatus” were collected from a mangrove site on the Egyptian Red Sea coast. The present study aimed to: "1" detect the different ... Read more

2020-07-08 20:49:31 | Keywords Cutic, Unionicola, Water mites,
Studies on the cuticle and musculature of freshwater mite, Unionicola aegyptiaca.
ABSTRACT BACKGROUND: The aquatic Acari are known as water mites and occupy a wide range of habitats. The freshwater mites, Unionicola aegyptiaca, were collected from the freshwater mussel, Caelatura aegyptiaca, River Nile, Sohag,Egypt. The present paper focuses on the structure of the cuticle and musculature of freshwater mite, U. aegyptiaca. RESULTS: Histologically, the cuticle consists of two main layers: epicuticle ... Read more

2020-07-08 20:46:30 | Keywords Identif, Biodiversity, Araneae,
Spiders (Arachnida: Araneae) of Jazirat Shandweel District, Sohag Governorate, Egypt.
This study gives highlights on the biodiversity of spiders in an olive trees orchard, a lemon trees orchard, and webs of Cyrtophora citricola at Jazirat Shandweel District, Sohag Governorate, Egypt. In addition, it gives a preliminary list of spiders based on the main taxonomic characters. The sampling was carried out weekly or monthly during the period: September, 2015 to January, ... Read more

2020-07-08 20:41:59 | Keywords aquatic orbited mites,
Description of two new species of aquatic orbited mites (Family: Malaconothridae, Genus: Malaconothrus) Sohag, Egypt.
Two oribatid mite species belonging to the genus Malaconothrus, namely _Malaconothrus ramadani_ sp. n. and _Malaconothrus transversus_ sp. n., were described as two new species. They were collected from the roots of the floating aquatic plant, Eichhornia crassipes in River Nile, Girga city, Sohag Governorate, Egypt. The first species, _Malaconothrus ramadani_ sp. n., is clearly characterized by zigzag-like lateral margins ... Read more

2018-10-31 10:34:49 | Biological Evolution (407Z)
Quiz -Evolution
1. Darwin's theory of natural selection to explain evolution is also known as A. Descent with modification. B. Inheritance of acquired characteristics. C. Uniformitarianism. D. Catastrophism. 2. Lamarck's theory of evolution included the idea that A. There is a natural force in all living things that pushes them toward perfection. B. Local catastrophes cause mass extinctions of species. C. Species ... Read more

2018-10-31 10:23:06 | Biological Evolution (407Z)
Question 1.
Question 1. This natural philosopher proposed that evolution resulted from the inheritance of acquired characteristics - for example, giraffe offspring acquired longer necks because their parents stretching to reach higher leaves. * Jean-Baptiste Lamarck * Charles Lyell * Alfred Wallace * Thomas Malthus Read more

2018-10-18 09:27:18 | Biological Evolution (407Z)
First Lecture - part 2
Briefly writ on how NASA in 1996 supported the Cosmic theory of evolution? Read more

2018-10-18 09:23:41 | Biological Evolution (407Z)
First Lecture
* Evolution is one of the most important and critical ideas that the human mind has created over many years. Discuss? Read more