F Dadfar; A Bahedini; H. R. Esmaeili
Volume 4, Issue 3 , January 2016, , Pages 31-39
Abstract
Abstract The growth is a one of biological aspects of fishes and is a good index in order to determine of health of these population. The aim of this study was to investigate the effect of different color lights on condition factor and weight- length relationships (LWR) of rainbow trout. Fertilized ...
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Abstract The growth is a one of biological aspects of fishes and is a good index in order to determine of health of these population. The aim of this study was to investigate the effect of different color lights on condition factor and weight- length relationships (LWR) of rainbow trout. Fertilized eggs of fish were kept under light conditions, 14h light and 10h dark for 5 months at seven lights color of white light(control), azure, blue, green, yellow, orange and red in farm aquaculture. After yolk sac absorption, weight and length of fry were measured by a digital scale and a caliper randomly. Data was analyzed by ANOVA, Duncan and Regression test. The results were showed that the highest and lowest condition factor was observed in yellow and green light respectively, but there wasn't significant different between treatment groups. There was seen significant association between weight- length relationships in different lights. Growth pattern in often lights was isometric in different days. In some of lights, growth pattern was negative allometric. On the base of data of this study, it was concluded that different light can cause similar changes in weight and length of fish. In other words, rainbow trout can growth in different light proportionately.
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
H Zareian; H. R. Esmaeili; A Gholamhosseini; A Moazeni
Volume 2, Issue 4 , March 2014, , Pages 77-90
Abstract
Zoning and implementation of strict program for each zone must be done to procurement of management goals in protected areas. In order to evaluate the ecological potential of Kuh-e Gorm, non-hunting area (83410 ha) in Fars province, possibility of its conversion to a protected area and land management, ...
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Zoning and implementation of strict program for each zone must be done to procurement of management goals in protected areas. In order to evaluate the ecological potential of Kuh-e Gorm, non-hunting area (83410 ha) in Fars province, possibility of its conversion to a protected area and land management, zoning has been performed using GIS software. Thus, to pursue this purposes, nocturnal and daily surveys were done to identify vegetation communities and animal species. Ecological and socio-economic resources were initially surveyed and mapped (1:100.000). Overlaying of different maps, created final map of environmental units (with 625 environmental units). Table of environmental units was completed and positional data were analyzed, then area was zoned for mentioned purposes. The result show that 7 zones are possible in the area as follows: 10.74% of the area is suitable for restricted nature reserve, safe area zone 31.86% for protected area zone, 2.40% for restricted use zone, 46.88% for extensive use zone, 4.11% for rehabilitation zone, 0.61% for special use zone and 3.40% for buffer zone. In total 42% of allocated zones are suitable for conservational proposes. Some animal species such as Capra aegagrus, Lutra lutra, Dryomys nitedula, Aquila chrysaetos, Falco tinnunculus, varanus griseus and Testudo graeca are important in term of conservational value.
