Journal of Animal Research
Year:2018 | Volume:31 | Issue:3|Papers Count:6

According to evolutionary and systematic view, Ovis is one of the most complicated species in mammals. The Iran’ s central plateau with high and widespread mountains is an ideal natural habitat for wild sheep. The Haftad Gholleh Protected Area is located in the center of this plateau. Consequently, a large population of these wild sheep species can be found in this area. The present study was carried out with respect to morphological features of wild sheep including horn, color and patterns that was obtained using camera trapping records, quarry as well as direct observation of wild sheep in Haftad Golleh area. The collected data was analyzed using SPSS16 software. The research results indicate that there are three sub-species of wild sheep in Haftad Gholleh Protected Area. Two previous described species namely Armenian (Ovis ammon gmelini) and Isfahan (Ovis orientalis isphahanica) species and one new proposed sub-species or hybrid named as Arak wild sheep (Ovis orientalis arakica). The distribution of Isfahan and Armenian species has extended to Haftad Gholleh Protected Area. The highest number of population in wild sheeps belonged to Isfahan, Arak and Armenian species, respectively. Future study should be focused on parallel morphometric and genetic survey to clarify the status of the proposed sub species in Haftad Gholleh Protected Area.

Due to the migration of species in the certain seasons, the protected areas are not able to cover all required areas for the species. So, it is necessary that in the wildlife, the corridors between the protected areas be taken under control and protection. In order to study habitat corridors between the wild sheep of Golparabad region and Ahangaran (Lashgardar) and Lashgardar section of Lashgardar protected area, at first the habitat suitability of mentioned specie by GLM, ANN and SVM Was modeled and then based on 10% threshold, the species habitat suitability maps were converted to the binary map. The validation of models was also performed based on the statistical approach ROC, the maximum kappa index, and TPR index. Results show the suitability of the GLM compared to other two models. Sensitivity analysis of GLM was calculated using kappa maximum method. In order to identify the communication corridors between two existing habitat patches, the reverse habitat suitability map was used as the Friction map and identification of existing corridors was performed by using the electrical circuit theory. The obtained results of the sensitivity analysis of GLM showed that the variables of elevation, land cover classes, distance from the river and distance from the village had the greatest impact on the species distribution. According to the findings, the best range for connecting the habitat patches is within 1. 5 kilometers of the Eznaveleh village to Jozan in the limited area with the length of 800 meters.

The purpose of this study was to investigate the effect of different doses of trehalose and cysteine on bull frozen-thawed sperm quality. In this study, semen samples were collected from three healthy mature Holstein bulls by an artificial vagina. After primary evaluations, the samples were pooled to eliminate individual effects. Then, semen samples were divided into six equal parts and each part was extended and frozen with one of the following extenders. 1) without cysteine and trehalose (T0C0), 2) Five mM cysteine without trehalose (T0C5), 3) Ten mM cysteine without trehalose (T0C10), 4) A hundred mM trehalose without cysteine (T100C0), 5) Five mM cysteine with 100 mM trehalose (T100C5), 6) Ten mM cysteine with 100 mM trehalose (T100C10). Motility parameters, acrosome and membrane integrity and phosphatidylserine translocation assay were evaluated after thawing. All data were analyzed using a 2×3 factorial trail following data collection. The results of this study showed that cysteine had no effect on motion characteristics, apoptotic status, acrosome integrity and viability (P≥ 0. 05). Also motion parameters, viability, acrosome and membrane integrity, in group without trehalose was higher than group containing that (P≤ 0. 05). Regarding to interactive effects, the T0C10 group had higher amount of viability (P≤ 0. 05) and lower necrotic sperms compared to rest of the groups. Based on the results, it can be concluded that cysteine had no remarkable effect and addition of Trehalose could negatively affects post-thawed bull sperm quality.

Sampling of adult Alburnus chalcoides was conducted randomly in the Bony Fish (Osteichthyes) Center of Shahid Ansari of Rasht. At first, measurements were made to study the morphology of Alburnus chalcoides and then the gastrointestinal tract of this fish was extracted for histological examination. For histological studies, Hematoxylineosin staining (H & E), and to investigate the polysaccharide neutralization, Periodic acid Schiff (PAS), and finally for evaluation of the proteins compounds Bromophenol blue (BPB) were used. In the studies, it was observed that the gastrointestinal tract of this fish included the esophagus and intestines. Esophagus was short and has relatively long mucosal shapes and in the intestine, there were also these mucosal shapes with more space apart. Cyprinidae have not real stomach. In the anterior part of the intestine, shapes are more and deeper but the Goblet cells are seen in the posterior part of the intestine. Goblet cells are also observed in both the esophagus and intestinal areas which showed a positive reaction with PAS due to neutral polysaccharide compounds. Protein compounds in the enterocyte cells of the intestine as well as mucosal cells of the esophagus rarely respond to BPB. Reactions with these two colors were also observed in liver cells and hepatopancreas. The results show that the characteristics there are specific variations of species related to the esophagus and the intestines.

The objective of this study was to evaluate the effects of (Myrtus communis L. ) extract on the growth, survival, immunological system and hematology indices of common carp. For this experiment, a total number of 500 fry carps with the average weight of 2. 981± 16. 153g were feeding with extract myrtus: 500 mg/ kg (second treatment) and 700 mg/ kg (third treatment) and were compared with control treatment (without extract). In fry carps, growth and survival parameters increased in the 500 mg/ kg extract myrtus relative to control treatment. Hematology parameters increased in fish fed with 500 and 700 mg/ kg extract myrtus compared to control treatment (P<0. 05). The level of cholesterol were observed in second and third treatment 110. 76 and 137. 54 mg/di, respectively and triglycerides were showed in second and third treatment 263. 83 and 282. 16 mg/di, a significant reduction (P<0. 05). Only calcium was positively affected of extract by biochemical parameters of blood (P<0. 05). Overall, the results showed that the myrtus plant could increase the growth and survival of the carp fish in culture conditions. Especially, in 500 mg/ kg myrtus extract, was significantly different compared to the control treatment (P<0. 05).

In this research, histological structures of different parts of kidney (trunk and head kidney) were described in 21 fish species from northwest regions of the Persian Gulf. Fishes were anesthetized and then their kidneys with some adjacent vertebral column were collected and fixed in Buin’ s solution for histological purposes. Samples were processed according to routine paraffin method sectioned (5 micrometers) and stained (Hematoxylin and Eosin). According to the results, kidneys have two distinct structures including hematopoietic and excretory tissues. Head kidney has more hematopoitic role with nephrons among them. Different types of blood cell such as red blood cells, lymphocytes, monocytes and granolocytes as well as plasmacells, reticular cells and macrophages were observed in head kidney. There were melanomacrophage bodies among hematopoietic tissues in some species. Excretory parts in studied species were included of glomerules and nephric tubules. Neck section, proximal tubule (I and II), distal tubule and collecting tubule were present in nephric tubules. In chondroichthyes such as Grey Bamboo Shark (Chiloscyllium griseum) and Stingray (Himantura walga) nephrons have bigger parts in comparison with osteichthyes due to evolutionary aspects.