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International Journal of Aquatic Biology - Volume:2 Issue: 1, Feb 2014

International Journal of Aquatic Biology
Volume:2 Issue: 1, Feb 2014

  • تاریخ انتشار: 1393/02/12
  • تعداد عناوین: 8
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  • Mohammad Amini Chermahini, Samad Bahrami, Farideh Bakhshi, Amir Hossein Tahmasebi, Fatemeh Shahrani Pages 1-8
    This study was carried out to provide some information on the biological features of the endemic Sucker Catfish, Glyptothorax silviae, from the Maroon River in the Tigris basin, Iran. Samples were collected at monthly intervals throughout the year and 277 individuals of G. silviae were caught. The mean total length and weight were 8.1 ± 1.7 (±SD) cm and 5.8 ± 3.5 (±SD) g and maximum length and weight were 11.9 cm and 17.4 g, respectively. Length-Weight relationship of the total specimens was calculated as W = 0.006 TL3.205, (R2 = 0.956) indicating allometric growth and was not significantly different between males and females. The overall condition factor was 0.62. The sex-ratio (1.23M:1F) was not significantly different from the expected 1:1 ratio. Glyptothorax silviae reproduces during June-September. Absolute and relative fecundity was 1129 eggs/fish and 105 eggs/g body weight, respectively. The egg size ranged from 0.994 to 1.76 mm with a mean value of 1.29 ± 0.171 (±SD) mm. The highest values of gonadosomatic index were observed in June-July. The gut content analysis revealed that G. silviae feeds only on aquatic insects.
    Keywords: length, weight relationship, fecundity, gonadosomatic index, diet, Maroon River
  • Mohammad Hashem Malekzehi, Hamid Reza Esmaeili, Halimeh Zareian, Zahra Farahani, Abdolrahim Pazira Pages 9-13
    In the present investigation, Lernaea parasite was reported in the examined fish species, collected from the Mashkid River basin, Southeast of Iran in 2012 and 2013. Lernaea parasites were isolated from the external surface of eye, fins, operculum and body of the Bangana dero, Cyprinion microphthalmus, Gonorhynchus diplocheilus (Cyprinidae), Aphanius dispar (Cyprinodontidae), Channa gachua (Channidae) in different water bodies. The highest infection was found in native fish, B. dero with nine parasites in single specimen. The exotic fishes were not infected.
    Keywords: Copepod, Mashkid River Basin, Native fishes
  • M. Manjurul Alam Tohidur Rahman, Selina Parween Pages 14-19
    The research was aimed to carry out the length-length relationships, length-weight relationship and condition factor of five freshwater small indigenous fish species i.e. Amblypharyngodon mola, Puntius ticto, Cirrhinus reba, Chanda nama and Aspidoparia morar from the Pagla river Bangladesh. The relationships equations among different body length parameters of each species were found highly significant. The length-weight relationship equation were found as TW=0.0351 TL2.86 for A. mola, TW = 0.0104 TL3.10 for P. ticto, TW = 0.0261 TL2.96 for C. reba, TW = 0.0175 TL2.845 for C. nama TW= 0.0101 TL3.05 for A. morar. The “b” values ranged from 2.845-3.10 which remained on the expected range of optimum growth.
    Keywords: Amblypharyngodon, Aspidoparia, Puntius, Cirrhinus, Chanda
  • Omid Jafari, Ali Shabany, Hamed Kolangi Miandare Pages 20-26
    In this study, five Microsatellite loci were used to evaluate genetic diversity of A. braschnicowi between two populations of the Caspian Sea. Sixty samples were collected from the coasts of Mahmodabad and Sari (30 specimens for each population). Five Microsatellite loci were highly polymorphic among all samples. The number of alleles per locus observed ranged from 17 to 32 and averaged 14.1 alleles across two populations. The average observed heterozygosis in Mahmodabad and Sari were 57.1% to 60.1% and average observed heterozygosis between two populations was 58.9%. Among 10 population-locus (5 loci × 2 populations) only two tests were in the Hardy-Weinberg equilibrium, so highly deviation from the Hardy-Weinberg equilibrium was found. The average values of Fis and Nm were 0.33 and 14.19, respectively. Also AMOVA on base Fst index showed low genetic difference between two populations (2%), while the genetic diversity within population was 98%. Due to allelic diversity and estimates of heterozygosity, these markers can be useful in Alosa genus for population level analysis in the Caspian Sea.
    Keywords: Alosa braschnicowi, Caspian Sea, Microsatellites, Molecular marker, Polymorphism
  • Saber Vatandoust, Arash Joladeh Roudbar, Hamed Mousavi-Sabet Pages 27-28
    The loach fish Paracobitis cf. malapterura Valenciennes, 1846 (Nemacheilidae), formerly believed to be an endemic species in the Caspian Sea basin, was recorded for the first time in the upper Kavir basin. This extension of its recorded range makes it likely that it has been overlooked in other parts of the Kavir basin.
    Keywords: Nam River, Iran, zoogeography, Nemacheilidae
  • Amir Hossein Hamidian, Majid Atashgahi, Nematollah Khorasani Pages 29-35
    Industrial wastewaters are of the major sources of heavy metal pollution in the environment. In the Middle East, gas and oil industry is the major source of heavy metal pollution and releases significant amounts of metals into the terrestrial and aquatic environment. In this research the capability of the common reed (Phragmitis australis) in absorbing heavy metals Cd, Pb and V from the wastewater of a gas refinery plant in Iran was investigated. The plant samples were collected from the vicinity of the Bidboland gas refinery plant in Iran and were used for the treatment of wastewaters collected from the outflow of the refinery plant. The metal concentrations were measured in the roots of the plant species before treatment and after 2, 6 and 10 days of treatment procedure. The heavy metal concentrations were measured after acid digestion and using an ICP-OES instrument. After 10 days of treatment, the concentrations of the metals in plant tissues increased by 2.5, 6.9 and 2.7 times for Cd, Pb and V, respectively. The best treatment time was suggested to be 6 days. The common reed was observed to have a very good capability in removing heavy metals from the gas refinery wastewater.
    Keywords: Gas refinery, Heavy metal, Phytoremediation, Phragmitis australis, Wastewater
  • Roxana Moogouei Pages 36-42
    In this study various important indices were selected to assess the sustainable aquaculture strategies in rural areas of Iran. In addition the government officials, consultants and managers were surveyed to assess the indices of aquaculture development. The strengths, weaknesses, opportunities and threats analyses were used to make a comprehensive evaluation on internal and external factors, participating the development of aquaculture strategies. The sum of the attractiveness scores from the Internal Factor Evaluation Matrix was approximately 2.55, being larger than 2.5, indicating that the strengths exceed the weaknesses. The sum of the External Factor Evaluation Matrix scores was 3.49, indicating that opportunities were higher than threats. This analysis showed that the development of aquaculture, promotion of new cold-water species production, productivity enhancement, establishment of hatchery facilities and formation of an effective support organization are the most important strategies that should be considered in the studied area. Results obtained on this research help decision makers on work of the aquaculture sector in rural areas of Iran.
    Keywords: Aquaculture, Rainbow trout, Rural areas, Iran
  • Mahdi Banaee, Mehdi Naderi Pages 43-52
    Shirbot (Barbus grypus) is one of the species in south and southwest of Iran which is greatly favorable to residents of the region. Unfavorable ecological conditions in habitat of this species and overfishing have led to the reduction of the population of shirbot. Therefore, to restore the natural stock of this species, identifying its reproductive cycle associated with its habitat is of a great importance. In this study, the reproductive status of shirbot in the Maroon River in Khuzestan Province was studied in six sampling steps during four seasons. Also, morphological indicators, sex ratio, age of fish, gonadosomatic and hepatosomatic indices, histological changes in the testis and ovary of the fish were studied. The ratio of male fish to female was 2.35 to 1. The maximum value of gonadosomatic index (GSI) is among the specimens aged 3 to 5 years and in March and April. An increase of hepatosomatic index (HIS) during March may indicate the increased activity of liver during vitellogenesis and vitellogenin synthesis which is well verified by histological results of ovarian tissue. Based on our findings we recommend that the maximum reproductive activity of shirbot in the Maroon River starts around the end of March and continues to middle of July.
    Keywords: Shirbot, Reproductive Cycle, Maroon River, Gonad Histology