animal biosystematic
Sayyed Mahdi Heydari; Shahrokh Pashaei rad; Kamran Kamali; Mohammad Yaghoubi-Avini
Abstract
Reptiles are not only of economic value, but also culturally, historically, artistically, educationally, agriculturally, and ecologically. By hunting insects, they can play an effective role in agricultural pest control. Sampling was done non-invasively after determining 27 stations. 203 samples of Paralaudakia ...
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Reptiles are not only of economic value, but also culturally, historically, artistically, educationally, agriculturally, and ecologically. By hunting insects, they can play an effective role in agricultural pest control. Sampling was done non-invasively after determining 27 stations. 203 samples of Paralaudakia caucasia were collected and identified. Among these, 30 samples of adults and 14 samples of Juveniles species were subjected to biometrics. The obtained results of the biometrics, after checking in the IBM SPSS Statistic 24 software shown that there are significant differences in the SVL (Snout-Vent Length), TrL and TL. The significant differences can be attributed to the presence of the river and differences in vegetation. The mountain soil in the Eastern part is rocky and in the West is clay-rocky, can be considered as an important factor in the differences. The present study result had the significant differences with the other result reported from Shahrood and Mazandaran cities.
Fisheries
Madat Balouch; Seraj Bita; Nazanin Ghorbani Ranjbari
Abstract
The present study was carried out with the aim of determining the biometric factors, length and weight relationship, frequency percentage of length and weight groups, and identification of food groups consumed in Alepes djedaba fish caught from the coast of Makkoran. For this purpose, 120 samples of ...
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The present study was carried out with the aim of determining the biometric factors, length and weight relationship, frequency percentage of length and weight groups, and identification of food groups consumed in Alepes djedaba fish caught from the coast of Makkoran. For this purpose, 120 samples of Alepes djedaba were collected from the three catchment areas of Ramin, Haft Tir and Tis in Makkoran coast located in Sistan and Baluochistan province seasonally from autumn 2019 to summer 2020. The prepared fishes were caught by traditional fishing boats. After the fishes were prepared and transferred to the laboratory, the biometric characteristics, including the total length and body weight, were measured and the pattern of growth was determined. In the next step, in order to identify the food items, the contents of the digestive system were separated and identified. The results of the present study showed that the Alepes djedaba caught in the Makkoran coast in different seasons have different length and weight ranges. The average total length and weight of the fish were 28.00±4.68 cm and 311.18±12.00 gr, respectively. Based on the results, the value of b in the length-weight relationship to determine the growth pattern did not show a significant difference with the number 3 (p>0.05), which indicates isometric growth in this species. Food items identified in the stomach contents of this species included fish and crustaceans. According to the food items identified in the digestive system of the studied fish, it seems that this species is an advanced predator that is at the top of the food chain. Therefore, despite the differences in the composition of the population of food items in each environment, this fish feeds on a relatively constant diet including various types of fish and small crustaceans. From the obtained results, it can be stated that this species is carnivorous and its growth is isometric, and in different seasons of the year, different length and weight groups of this fish are caught in the Makkoran coast.
E. Haghighy; M. Sattari; S. Dorafshan; Y. Keivany
Volume 3, Issue 4 , July 2015, , Pages 37-46
Abstract
Abstract
Spirlin, Alburnoides eichwaldii, is an abundant riverine fish in the south west Caspian Sea basin. Sixty specimens of Spirlin from Kargan-Rud, and Lamir (30 specimens from each river) were studied and compared from morphological point of view in August 2010.Thirty-one morphometric characters ...
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Abstract
Spirlin, Alburnoides eichwaldii, is an abundant riverine fish in the south west Caspian Sea basin. Sixty specimens of Spirlin from Kargan-Rud, and Lamir (30 specimens from each river) were studied and compared from morphological point of view in August 2010.Thirty-one morphometric characters were measured and thirteen meristictraits were counted on each specimen. Nonparametric methods for comparison of means and Principal Component Analysis (PCA) for separation of populations were used. Among the meristic characters, nine characters were significantly different between the four populations (p<0.05). Among the morphometric and relative morphometric characters, nineteen characters showed significant differences (p<0.05) between the two populations. In the PCA of meristic characters, three factors accounted for 47.5% of variations within populations, including; caudal peduncle scales, scale above lateral line and anal fin ray numbers. Within the morphometric characters, three factors accounted for about 71% of variations within the two populations, including dorsal fin height, pectoral fin base, ventral fin length, caudal peduncle depth, head length, inter orbital width, standard length to pre dorsal length, head length to snout length, head length to eye diameter and head length to inter orbital width. The results showed while morphometric and relative morphometric characters were not useful for separating the two populations and sexes, the meristic characters could relatively separate these two populations.
sayyad shaykhi; M Yousefi; E Rastegar Pouyani; V Zamani
Volume 3, Issue 1 , January 2015, , Pages 39-48
Abstract
Motacilla alba has three subspecies in Iran including M.a. personata, M.a. persica and M. a. dukhunensis. There is some evidence to support hybridization The among these subspecies. In this study, morphological differences between two subspecies of White Wagtail in Iran including M.a.personata and M.a.persica. ...
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Motacilla alba has three subspecies in Iran including M.a. personata, M.a. persica and M. a. dukhunensis. There is some evidence to support hybridization The among these subspecies. In this study, morphological differences between two subspecies of White Wagtail in Iran including M.a.personata and M.a.persica. were investigate For this purpose, 17 specimens were collected from South and North East of Iran during the spring and summer of 2011. Then seven primary variables were and six calculated ratios for comparison in multivariate analyses using Past program measured . Also coloration of head, forehead, crown and throat between to subspecies Were Compared. T test revealed that five characteristics were significantly different between two subspecies (P
M Amanat Behbahani; M Nokhbatolfoghahaei; H Esmaeili
Volume 2, Issue 4 , March 2014, , Pages 51-65
Abstract
Despite the application of Marsh frog Rana (Pelophylax) ridibunda in research, there is little information about the biology of different populations of this frog, especially in southern Iran Provinces. The first aim of this study was to investigate differences in biometric characteristics especially ...
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Despite the application of Marsh frog Rana (Pelophylax) ridibunda in research, there is little information about the biology of different populations of this frog, especially in southern Iran Provinces. The first aim of this study was to investigate differences in biometric characteristics especially between male and female from different populations of species in Fars province. The second aim was the histological study on the male and female gonads which can help to explore some reproductive strategies of the frog in this region (Fars Province). This study will determine whether at the time of spawning, the gonads(testies and ovaries) are completely depleted from egg and sperm. In addition to this, the possibility of guessing the ability of the marsh frogs to spawn more than once during the reproductive season will be investigated. For this purpose 120 samples (87 females and 33 annuly males) from different population areas (Ghadamgah, Mehkoyeh, Kohmareh Sorkhi and Pol Berenjie) were collected. Samples were fixed in formaldehyde and transferred to the laboratory. Morphometric measurements were made and samples labeled. For histological study of gonads, adult pairs in amplexuses situation were collected from the natural breeding sites. One-way analysis of variance (ANOVA) showed that the samples from four population sites were significantly different (P
