Global Status of Marine fishes production in Cage Culture
Hamid
Eshaghzadeh
Iranian Fisheries Science Research Institute, Agricultural Research Education and Extension Organization (AREEO), Tehran
author
Reza
Mortezaei
Iranian Fisheries Science Research Institute, Agricultural Research Education and Extension Organization (AREEO), Tehran
author
text
article
2018
per
Aquaculture development is facing a lot of problems due to shortages of freshwater and land areas also traditional approach, which has led to the expansion of fish farms to marine waters. Cages went through several stages of development to become what it is today. Cage culture is a good Approach to develop aquaculture. Cage culture in Iran go through a phase of being stable, so private sector investment and entry into this field is due to lack of sufficient knowledge and experience have been experienced with many questions. This paper provides available information on the status of marine aquaculture around the world, Asia and Iran in regarding to the amount of production and various fish species as well as the general policies of the Iranian Fisheries Organization to promote this new industry. It has also been attempted to highlight the strengths and weaknesses of Iran's cages culture. The results of research show that Asia has the highest level of marine aquaculture production in the world, unlike other Asian countries, Iran's marine aquaculture has not developed much and its high potential in relation to spatial sites in the north and south of the country and also specialist workforce have been denied. Ultimately, it is recommended that by removing technical barriers such as site selection and suitable cage establishment locations, introducing new species, selecting the type of structure, production and breeding management, health care and processing, economy and market can be achieved to development of this innovative industry in the marine aquaculture.
مجله شیل
2588-5626
6
v.
1
no.
2018
1
8
https://shilsj.ut.ac.ir/article_65911_81779e3af150a516017b9efb3df855a0.pdf
Investigating the structure of the benthic communities in around the Hashilan wetland based on biological indices
mona
moghadam
Department of Aquatic Ecology, Faculty of Environment, University of Environment, Karaj
author
Samira
Kiany
Department of Aquatic Ecology, Faculty of Environment, University of Environment, Karaj
author
Saeed
Pahlevani
Department of Aquatic Ecology, Faculty of Environment, University of Environment, Karaj
author
Kiyadokht
Rezay
Department of Fisheries, Faculty of Natural Resources, University of Tehran, Karaj
author
text
article
2018
per
The Hashilan Wetland is located on 36 km northwest of Kermanshah. Considering the existence numerous agricultural land around of the wetland, it seems necessary to evaluate and biomonitoring its. In this study, with the aim of the identified benthic organism, we sampling the margin of the wetland in four stations. According to the estimates, In accordance with the Helsinhof and EPT % indicators, around water of the wetlands are heavily polluted and have poor biological conditions, so that the reduction diversity of species and abundance of oxygen-resistant species is clearly evident. Considering the increase in human and agricultural activities around the wetland and the lack of precipitation over the past few years, existing of the situation that cause of high pollution has not seemed distant from the mind. Obtain result of the sampling and laboratory assay were analysis by Excel and PAST software, and the assessment on the basis of biological indices and biodiversity. With the using a cluster analysis, the similarity between the stations studied was based on the presence of the Benthose and indicators used, which was confirmed Beside at laboratory studies. according to the data obtained in reducing the diversity Species and abundance of the presence of resistant species to oxygen deficiency were observed at this wetland. In general, Oligochaeta had the highest presence in the three stations, which included the Glosiphonidae and Tubeficidae in the first station, at the second and third stations, including Tubficidae families. At the fourth station, the dominant abundance of order Diptera has been Chironomidae families.
مجله شیل
2588-5626
6
v.
1
no.
2018
9
18
https://shilsj.ut.ac.ir/article_66136_4aef8629c211762da161a6b2bf9cbcf9.pdf
Evaluation of the effects of fish farms wastewater on the Sirvan River water using physicochemical factors
tayeb
weisi
university of urmia,faculity of natural resources, department of fisheris
author
Nasrollah
Ahmadifard
university of urmia,faculty of natural resources, department of fisheris
author
naser
agh
Assistant Professor, Department of Artemia, Urmia lake Institute, Urmia University, Iran
author
morteza
kamali
faculity of natural resources, university of tarbiat modares
author
text
article
2018
per
Rainbow trout farm effluent impacts on physicochemical parameters were evaluated Sirvan River. Five stations in different parts of the river were determined. Parameters including temperature, dissolved oxygen, conductivity Electrical, ammonia, nitrite, nitrate, alkalinity, TDS and TSS at various stations at an interval of every 30 days from January 2015 to June 2015 were measured. The results showed that in terms of temperature and dissolved oxygen There was a significant difference between different seasons (P<0.05) and ammonia effluent on fish farms at various stations had a significant effect (P<0.05). The results showed that in terms of EC at various stations and different seasons had a significant effect (P<0.05) and alkalinity, nitrate, nitrite, TDS and TSS There was not a significant difference (P>0.05). The results showed that the concentration of physical and chemical parameters in the Sirvan River during sampling of the condition is relatively good and have good purification conditions.
مجله شیل
2588-5626
6
v.
1
no.
2018
19
28
https://shilsj.ut.ac.ir/article_66632_500c9ae2cc3d0e03ba7cdbe62dbceb62.pdf
Investigating of macrobenthic community structure in Sirvan River (range: Palangan fish farms)
tayeb
weisi
university of urmia,faculity of natural resources, department of fisheris
author
Nasrollah
Ahmadifard
university of urmia,faculty of natural resources, department of fisheris
author
naser
agh
Assistant Professor, Department of Artemia, Urmia lake Institute, Urmia University, Iran
author
morteza
kamali
PhD student, Department of marine science, Tarbiat modares University, Iran
author
text
article
2018
per
In this study, from January 2015 until the June 2015 macrobenthic community was examined at four stations used the water quality of the Sirvan River, which was affected by the Palangan fish farm wastewater. For sampling of benthos, Sorber was used. In the study of the benthic rivers, 4148 species were identified, separated, and belonged to 25 families, 15 order, and 22 genera. Among them, larvae of aquatic insects have been most diverse. The lowest number of benthos in station 1 and in March was Odanata with one per square meter and the highest number belonged to Ephemeroptera at station one and in June with 375 per square meter. The Hilsinhof biological indices, Shannon diversity and OC percentage (Oligochaeta + Chironomidae) showed a statistically significant difference (P<0.05). The percentage of EPT was significantly affected by the interactions between the season and station (P<0.05). However, the frequency, EPT, and EPT/ Chironomidae did not show a significant difference between season and station (P<0.05). Based on the results obtained from the upstream stations to the low distribution and the frequency of contaminated organisms, they increase against contaminated organisms, which indicates the desired quality of the downstream stations relative to the upstream stations. In addition, fish farms wastewater in the studied area has good purification.
مجله شیل
2588-5626
6
v.
1
no.
2018
29
42
https://shilsj.ut.ac.ir/article_66654_92fe0e698be13caf4d4a65090c52c6ca.pdf
Investigation of Gonadosomatic index of Capoeta razii in Zav River, Golestan national park
Arezoo
Kor
Department of fisheris, Faculty of of Natural Resources, Department of Fisheries, , University of Gonbad Kavous, Gonbad Kavous
author
Rahman
Patimar
Department of fisheris, Faculty of of Natural Resources, Department of Fisheries, , University of Gonbad Kavous, Gonbad Kavous
author
Mohammad
Harsij
Department of fisheris, Faculty of of Natural Resources, Department of Fisheries, , University of Gonbad Kavous, Gonbad Kavous
author
Arsalan
Bahalke
Department of fisheris, Faculty of of Natural Resources, Department of Fisheries, , University of Gonbad Kavous, Gonbad Kavous
author
text
article
2018
per
In this research, some biological characteristics including sex ratio and gonadosomatic index of Capoeta razii population were investigated from January to April 2016. Sampling was done on a monthly basis and 111 specimens were caught by Electrofisher. The sex ratio of the fish caught was 1.78:1. The highest mean gonadosomatic index (GSI) was found for both males and females in April, which was 4.62 and 7.39 for males and females, respectively. The maximum total length and weight of females were 198.00 mm and 120.53 gr, and for males 187.00 cm and 83.88 gr, respectively. The results showed that reproductive season of this species in the studied area in April.
مجله شیل
2588-5626
6
v.
1
no.
2018
43
47
https://shilsj.ut.ac.ir/article_66655_5a133418e2b00d78a584b31321033b99.pdf
Length-weight relationship and condition factor of Capoeta razii in Zav River, Golestan National Park
Arezoo
Kor
Department of fisheris, Faculty of of Natural Resources, Department of Fisheries, , University of Gonbad Kavous, Gonbad Kavous
author
Rahman
Patimar
Department of fisheris, Faculty of of Natural Resources, Department of Fisheries, , University of Gonbad Kavous, Gonbad Kavous
author
Mohammad
Harsij
Department of fisheris, Faculty of of Natural Resources, Department of Fisheries, , University of Gonbad Kavous, Gonbad Kavous
author
Arsalan
Bahalke
Department of fisheris, Faculty of of Natural Resources, Department of Fisheries, , University of Gonbad Kavous, Gonbad Kavous
author
text
article
2018
per
This study was carried out to the evaluated growth pattern of Capoeta razii with 182 fish samples that obtained from January to March 2016 with Electrofishing. The sex ratio of male to female was 1.53:1, it means male and female has the same ratio in the population (X2=3.568, P>0.05). The maximum total length and weight were 198 mm and 120.53 gr for females, 187 mm 83.87 gr for males. The length-weight relationship (LWR) of female was W = 0.0103 TL3.07 (r2=0.99) and the LWR of male was W=0.01 TL3.09 (r2=0.99) and the total LWR was W= 0.0101 TL3.09 (r2=0.99). The results showed positive allometric growth for population and Male, Isomeric growth for Female (t-test, tmale=8.62, tfemale =8.02, tpopulation=10.93, P>0.05). The condition factor was estimated 1.01 ± 0.13 in male and 1.10±0.17 in female and the total condition factor was 1.02±0.12.
مجله شیل
2588-5626
6
v.
1
no.
2018
48
54
https://shilsj.ut.ac.ir/article_66711_85dd5e8712827b8b265ef896111587d6.pdf