The aim of this study was to examine the possibility effects of betamethasone on a differential white blood cell counts in the hen،s Egg test – chorioallantoic membrane (HET- CAM) test as a novel in vivo model. As well as in this study was manifested this model had to all types of mature white blood cells of chick embryos in age 12-15 days of incubation period. Because of the short period of chick embryos were treated with betamethasone (only 120 minutes) did not showed significantly changes in leukocyte counts (Neutrophils, Lymphocytes, Monocytes, Eosinophils and Basophils) in treated groups with different doses of betamethasone (3, 6, 12, 24, 48, 96, 192 μg / g of total egg weight, topically). We conclude in this study that, the (HET- CAM) test may be used as in vivo model to study the changes in deferential leukocyte counts, because of the blood smear have all types of leukocyte, and the work was appeared in this model have low cost accompanied with other laboratory animals.

Bay of Algiers is situated at the heart of the Algerian capital, where the population density and urban important, and many factories and commercial activities, making it vulnerable to pollution, especially along the coast, in addition to climate change that result on the planet, all this lead us to study the impact on the coast of the Bay of Algiers, and its exposure to risks of erosion and marine intrusion. The aim of this work is the perception of vulnerable coastal areas, by determining the Coastal Vulnerability Index (CVI) at the level of the bay of Algiers, through reliance on physical factors. Through the Geographic Information System (GIS), we can process and analyze the information, and propose technical solutions to protect and manage the coastal, especially the sensitive areas near river mouths, a place of exchange and interaction of intense sediment transport.

Achatina fulica snails from two environments (natural and breeding) were subjected to two diets, one based on green fodder and the other in the form of flour concentrate, respectively, in order to assess their impacts on the development of gametes. 50 snails were dissected, with 25 from the natural environment and 25 from the breeding environment. Subsequently, the extraction of gonad (ovotestis) was performed on each of the selected animals. After inclusion, histological sections were made to assess the degree of evolution of gonad according to development scales. This allowed us to identify the different stages of sexual development, sexual maturation per size class according to diets.

Spiders are one of the most diverse and ubiquitous group of animals. Despite being one of the most diverse groups of animals existing in India, their study has remained largely neglected. The present research paper provides a preliminary report on spider fauna of Ahmednagar city, M.S. India. Spider specimen were collected from different localities in and around the city during July 2015 to March 2016. Total 25 spider species representing 9 families and 19 genera were recorded. Results obtained shows that the Araneidae is the most represented family with 11 species followed by Salticidae, Oxyopidae and Lycosidae (03 species each) and 01 species each from Hersilidae, Pholcidae, Eresidae, Tetragnathidae and Thomisidae. Araneidae is the most dominant family (44% of species) followed by Salticidae (12% of species), Oxyopidae (12% of species) and Lycosidae (12% of species). A note on medical importance of spiders was also added. The outcome of the present research work will update data on faunal resources of Maharashtra and will be helpful for future researchers working on the spiders of the area. The findings will also be helpful for taxonomic and phylogenetic studies on spiders.

The seas and oceans form integrated ecosystems giving life to many species and represent food and socio-economic benefits sources for millions of persons around the world. Unfortunately, nowadays these sources suffer from marine pollution which becomes a major problem that has negative effects on all of the planet's marine ecosystems. In the bay of Monastir (center coast of Tunisia), as many parts of the globe, economic development has been most active in this coastal zones, especially textile industry, fishing and aquaculture activities, putting enormous pressures on this coastal ecosystem. In this study, we tried to collect informations about the impact of marine water pollution in the bay of Monastir from sea users (fishermen, professional or not), and we tried to identify the main zones of pollution that may be potential zone for the intervention of protected area managers in the future.