Showing 5 results for Salehi
Hossein Adineh, Mohammad Sudagar, Hassan Salehi, Seyed Abbas Hosseini, Hosna Gholipour Kanani,
Volume 6, Issue 1 (Summer 2016)
Abstract
In the present study, we evaluated the effects of eyestalk ablation, Ovaprim hormone injected and sterile vehicle solution injected (control) on maturation, Ovarian tissue and biochemical changes in Litopenaeus vannamei. Sterile vehicle solution and hormone injections at 500 and 1000 ng/g body weight were performed with a 100 μl volume in three steps (0, 7 and 14 days). We examined 60 females at 4 treatments for 30 days. The apparent observation and histological studies showed that the highest percentage of the adult females and mature oocytes were related to eyestalk ablation treatment. We analyzed biochemical compounds (protein, lipid and carbohydrates) hemolymph, and body muscles at three stages of sampling (immature, maturation and after spawning). At different stages of sexual devlopment, significant differences in hemolymph and muscle amount of protein were observed between treatments (P<0.05). In three stages of sampling, the highest amount of protein in the hemolymph and muscle were observed in the eyestalk ablation and hormone injection treatments; we observed the lowest in the saline injection treatment. In each sample, the lipid contents in the hemolymph and muscle significantly differed between experimental treatments (P<0.05). Hemolymph of carbohydrate content significantly differed only at the time of sexual maturation (P<0.05).
Alireza Nazari Bajgan, Arash Akbarzadeh, Hasan Salehi, Ehsan Kamrani, Mehran Yasemi,
Volume 9, Issue 3 (Winter 2019)
Abstract
Myctophids are one of the most important and valuable resources of fish in the waters of the Oman Sea. Considering the economic aspects of its harvesting has an important role in catch management and profitability of fishing vessels. In this study, the economic profitability of different length classes of lanternfish (Benthosema pterotum) fishing vessels was investigated using Internal Rate of Return (IRR) in northwestern waters of the Oman Sea from April 2016 to March 2017. Lanternfish trawler vessels were classified in four length classes including 35-40 m (A class), 40-45 m (B class), 45-50 m (C class), and more than 50 m (D class). IRR index of vessels in each length class was calculated with consideration to the shipping costs and income of selling fish. Mean IRR (±SD) in one year and A, B, C, and D ship classes were obtained as 41±35, 55±55, 40±36, 41±28, and 35±28%, respectively. Results of this study showed that active lanternfish fishing ships have an appropriate internal rate of return and low investment risk in waters of the Oman Sea, and C ship class (45-50 m) showed the best internal rate of return and the lowest investment risk among four classes of lanternfish fishing ships. Results of this study can be used to improve the harvesting management of lanternfish resources and consequently, organize the active fishing ships in the waters of the Oman Sea.
Zahra Masoudian, Seyed Yahya Salehi Lisar, Akbar Norastehnia,
Volume 9, Issue 3 (Winter 2019)
Abstract
Anionic surfactants are widely used in many fields of technology and research due to their favorable properties and are considered as one of the most important factors in contamination of water resources. The presence of high concentrations of these compounds in aquatic environments induces oxidative stress and physiological changes in aquatic animals and threatens their life. In this study, the effects of 7 days exposure to concentrations of 0, 10, 20, 30 and 40 mg/l of linear alkylbenzene sulfanate surfactant was studied on lipid peroxidation, the activity of catalase enzyme, total carotenoid phenolic content, free proline, total chlorophyll content and membrane stability index in Lemna minor plant. The results showed that with increasing LAS concentration, the total chlorophyll content and carotenoid were reduced. The highest total phenol and free proline were observed in concentrations of 40 and 20 mg/l surfactant, respectively. Also, by increasing the concentration of surfactant, the activity of the enzyme catalase and lipid peroxidation increased and the minimum "membrane stability index" was observed in treated plants with a concentration of 40 mg/l of LAS. Concentrations of more than 20 mg/l of LAS caused significant toxicity in the plant Lemna minor.
Ahmad Ali Salehi Firoozkolaei, Mohammad Kazem Khalesi, Khosrow Jani Khalili,
Volume 13, Issue 1 (Spring 2023)
Abstract
The water quality of Sheshroodbar River in Savadkooh was studied with population indices of benthic macroinvertebrates through sampling in 12 intervals at five stations in three replications, along with measuring some physicochemical parameters during 2014-2015. Among the invertebrates of the river (16 families from seven orders and six classes, n = 5230), aquatic insects larvae had the highest diversity. Significant differences were found between EPT and EPT/CHIR indices at different stations (p ≤ 0.05), but Shannon and Hilsenhoff indices were not significantly different among stations (p ≥ 0.05). Diptera at stations 1 and 2 and Diptera, Ephemeroptera, and Trichoptera at station 3 (n = 202, 256, & 282, respectively) showed the highest annual mean abundance. Mean annual frequency of orders was maximum for Haplotaxida, Tubificida, Lmbricida, Lumbriculida, Oligochaeta and Ephemeroptera at station 4, and for Trichoptera at station 5. The highest (12.3 ± 0.11) and the lowest (1.66 ± 0.24) annual averages of the Shannon-Wiener index were estimated for stations 1 and 4, respectively. The annual water quality was found to be very good (3.99 ± 0.18) to moderate (5.21 ± 0.21) from station 1 to station 3 (upstream to middle stations). Annual water quality was relatively poor (6.11 ± 0.34) downstream of station 4 while it was fairly good (4.55 ± 0.39) at station 5 due to the river self-purification. With changes and stresses of the river, increased and relatively decreased frequencies were observed in resistant and susceptible groups of the macroinvertebrates, respectively.
Mohammad Reza Taherizadeh, Mohaamad Amin Salehi Domshahri, Adnan Shahdadi,
Volume 14, Issue 1 (Spring 2024)
Abstract
The aim of this study was to examine the accumulation of lead, nickel, and cadmium heavy metals in the muscle tissue of Peronia peronii in the waters of Bandar Lange and Qeshm in April. Thirty samples were separately collected from each station and subjected to drying and acid digestion before measurement using a flame atomic absorption device (GBC model F savant). The results revealed varying levels of metal accumulation, with the highest and lowest concentrations recorded as 0.112 and 0.024 micrograms per gram for nickel and cadmium, respectively, in Langeh and Qeshm ports. Additionally, a significant relationship between the concentration of nickel, lead, and cadmium and the average total weight of P. peronii was observed, indicating a positive correlation with the total weight (p<0.05). However, no significant relationship was found between the accumulation of these metals and the average total length of P. peronii in Bandar Lange and Qeshm Island, indicating a lack of correlation with the total length of the flounder seaweed (p>0.05).
