مجله علوم و فنون دریایی
سال هجدهم شماره 3 (پاییز 1398)

The purpose of this study was to identify and investigate the density and distribution of copepoda and cladosera and the structural analysis of their dominant species in the Arvand river by SEM (scaning electron microscope). Sampling was conducted with 50 μm mesh size plankton net at 6 stations and four times (in different seasons) with three reputation. The samples were detected by phase contrast microscopy and SEM. Totally 15 species of copepoda and 5 species of cladocera were identified in the river. The highest density of planktonic crustaceans including copepoda and cladocera with a mean density of 9481 and 3155 individuals per cubic meter was calculated in summer. These species, Acartia faoensis, Canthocalanus pauper, Subecalanus flemingeri, Labidocera acuta, which accounted for 61% of the total copepods abundance and 54% of the cladosera abundance were related to Moina macrocopa and Daphnia longisoina. The integrity of river were study using saprobic index which showed mesosaprobic-β (medium pollution) with mean 2.48 point.

Competition can be described as an extrinsic and environmental factor while competitiveness is an intrinsic feature. Free Industrial -Trade Zones are among the economic policies which the states’ macro-level decision and policy makes are involved in to enhance the national economy competitiveness, regional development, privation obviation, absorption of domestic and international investments, creation of job opportunities, obtaining of advanced technologies and development of exports. This research intends to identify the competitiveness success factors in free industrial -trade zones at the international levels.To do so,74 research papers were reviewed using meta-synthesis approach. Before the texts’ codings, the documents were filtered employing CASP (Critical Appraisal Selection Process) methodology and 1097 codes were identified through the MAXQDA software. Among the identified Factors, employing skilled and specialist managers (39 references), economic stability and formation of a knowledge-based economy (34 references), political stability and constructive foreign policy (33 references), institutional contexts (30 references), implementation of approaches based on technology,competence and structure(27 references),intelligent cooperation effective relationship with international markets (24 references), alignment of national economy with global economy(23 references),implementation of co-competitive strategies and determination of competitive priorities based on competitive advantages(21references), performance management(19 references) were the most important codes identified. The present research is innovative in regard to identification of competitiveness success factors of the free industrial- trade zones at the international levels employing the qualitative method of meta-synthesis and MAXQDA software in the area of the competitiveness of free industrial- trade zones.

The goal of this study is identifying opportunities and utilizing them due to developing Babolsar township marine and beach sports.Mixed research method has been done in two levels qualitatively and quantitatively.In qualitative level the opportunities have been determined in qualification level by semi-structured interview and then a questionnaire has been codified and it distributed among 25 human samples.In quantitative level in three rounds by Delfi method, as in first and second round the answer of questions was in type of yes or no questions and in third round, the questionnaire has been distributed in 5dimensions among samples with the 5-point Likert value.Statistical society includes professional of physical education and science sport,masters of tourism,masters of economic,province and township youth and sport department, coaches and national heroes of marine and beach courses.Friedman Test has been used In order to analyze data from SPSS software and rank the dimensions and variables. The findings shows that the geographical-tourism and infrastructure dimension is the most important dimension in this study which the existence of river and sea and beach has been determined as the most important opportunities in this dimension.The other dimensions have been determined in order of importance in geographical-tourism and infrastructure dimension, economical, human resources, management-communicative and cultural-social. It has been suggested to sport managers of the country and Mazandaran province due to determined opportunities reference of dimensions according to the ranks in this study and similar studies proceed to utilize them in order to develop marine and beach sports of Babolsar Township.

This study aimed to evaluate the Strengthening and developing tourism, and active Sports Tourists Factors with the theme of Caspian Sea coastal tourism. The present study is descriptive-survey and carried out on the field-by-field basis. The statistical population was 400 people including all the male staff of TV stations in the provinces of the country and the sample size was determined 196 people based on the statistical population using the Morgan table. A researcher-made questionnaire was used to collect data and its internal reliability was calculated and approved by Cronbach's Alpha coefficient of 0.89. The one-sample Kolmogorov–Smirnov test was used to determine the normal distribution of data. Each treatment was analyzed by Friedman, U Man Whitney, and Kruskal-Wallis test and with the help of spss19 software. The findings showed that the natural attractions with the average of 7.13 are the most important Intrinsic absorption and informative factors, media and advertisements with an average of 7.12, which are the most important external tourists ‘attraction factors. Also, external absorption factors were more important than internal absorption factors. According to the results, it is suggested to the managers and authorities to hold celebrations appropriate to the culture of the city to attract the coastal tourists; besides, the natural features of the sea. Informing and advertising about recreation and coastal facilities through media and travel agencies. Also, in the season that the passenger low provides the ground for more tourists’ attraction through the special discounts on beach resorts.

In this study, the geochemistry of heavy metals in the discharged waters of 16 brine springs, namely Pirmusa, dual springs of Gare-bardi, triple springs of Ghale-Madreseh, Batvand, Kuhzar, Aghili, Keh-e-Salen (Hafttanan), Ghasemabad, Ispareh, Garu, Dobalutan and Ramshir were evaluated. Most of the studied springs are discharged first in Karun river and finally to Persian Gulf. The assessments show that except for Ramshir and Garu spines cropping out in Mishan and Asmari Formations, respectively most of other brine springs are located in the evaporative Ghachsaran Formation. The maximum discharge ranges between 2 Lit/Sec (Ramshir and Ghale-Madreseh springs) and 330 Lit/Sec (Garu spring). The assessment of heavy metals dispersion and comparing with the standards of World Health Organization (WHO) and institute of standards and industrial research of Iran reveal that metals such as Hg, As and Pb are exceed than standards. Highlightly, Ramshir springs show variable degree of Cd enrichment. In the studied springs, the metal index is more than 1.

AbstractIn intensive and semi-intensive breeding systems of shrimp, growth and development Dependson natural foods addition, the complete nutrition that can provide all the nutritional requirements of existing needs. This study was done on 6shrimp farms pool in Choebdeh of Abadan for 7 months. Shrimp were fed with two different diets,Goldquine imported and domestic Shiraz Bayda. Sampling at the starter with an average weight of 2/52 ± 0/35, growing at an average weight of9 ± 1/41 and final with an average weight of 16± 1/41 was conducted. The results showed no significant difference in the indices of two diets (P