فهرست مطالب

Iranian Journal of Ichthyology
Volume:2 Issue: 4, Dec 2015

  • تاریخ انتشار: 1394/11/13
  • تعداد عناوین: 9
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  • Brian W. Coad Pages 227-234
    The land-locked country of Afghanistan has a restricted but relatively diverse ichthyofauna comprising 85 species in 10 families. The fauna is dominated by Cyprinidae (50 species) and other Ostariophysans (28 species). Eight species are endemics to Afghanistan within its political boundaries. There are three principal drainage basins: the endorheic Amu Darya draining to the Aral Sea with 29 species, the endorheic Helmand River basin draining to the Sistan terminal lakes on the Iranian border with 22 species, and the Kabul River basin draining to the Indus River with 44 species.
    Keywords: Biodiversity, Afghanistan, Distribution
  • Arash Jouladeh, Roudbar, Soheil Eagderi, Saber Vatandoust Pages 235-243
    Paraschistura alta, formerly reported from the eastern part of Sistan basin in Afghanistan, is reported for the first time from the Zahak River in Iranian part of this basin and its morphological characteristics, COI barcode and its phylogenetic relationship within other members of the genus Paraschistura from Iran are provided. All the measured meristic and morphometric characters of seven collected specimens of P. alta (SL= 65.8-112.1mm) from the Zahak River were in the range of its original description. The results of phylogenetic analysis based on the COI barcode region places the Iranian members of the genus Paraschistura into 11 groups, which show between 3.05% and 14.10% K2P sequence divergence. Paraschistura alta from Zahak River corresponds to a distinct clade, sister to P. bampurensis P. hurmozensis.
    Keywords: Mitochondrial gene, Phylogenetic analysis, Helmand River, Sistan basin, Iran
  • Zohreh Moradi Pages 244-261
    Iranian art is one of the richest artistic heritages in the world comprising different fields such as architecture, paintings, weaving, pottery, calligraphy, metalworking, petrography, etc. This art had inseparable link with nature; especially with plants and animals in different eras; and it has been interwoven with poetry and literature so that its glory, beauty and expression have increased over time. In this study, based on available resources and collections in the museums of the world, fish imagery depicted in ancient Iranian art has been studied and its importance is dis-cussed from different perspectives. Results showed that the use of plant and animal imagery, especially fish, in the ancient works such as stone, clay, bronze and fabric (textile) has a long history of several thousand years and the fish has been used as a symbol of religion, culture, social relationships and economy. On the other hand, fish imagery presents the past fish fauna, and along with the archaeological remains, provides information about the fish biodiversity, which is usually consist with the recent ichthyodiversity.
    Keywords: Fish imagery, Archaeology, Ichthyodiversity, Iranian artwork
  • Erdogan Cicek Pages 262-269
    The objectives of this study were to determine the age, growth, mortality and exploitation of a commercially important fish of northeastern Mediterranean Sea, Mullus barbatus from the Karatas coast of Iskenderun Bay during September 2002 and April 2003. A total of 212 specimens of red mullet were collected by monthly sampling using traditional bottom trawl net by commercial vessel (Coskun Reis, 22m length and 285HP) from 3 stations in three depth contours in ≤20m, 20-50m and 50-100m, respectively. The age of M. barbatus specimens was estimated by examining sagittal otoliths and it found that the age composition varied from I to V age classes. The mean total length and total weight values was calculated as 10.07±1.83cm and 12.04±8.22g, respectively and the calculated length-weight relationship was W=0.0072*L3.1618. The von Bertalanffy growth parameters were L¥= 21.98cm, k= 0.194 year-1 and to= -1.168 year. The instantaneous rate of total mortality (Z) was 1.39, the natural mortality (M) was 0.45 and the fishing mortality (F) was estimated to be 0.93. The exploitation rate (E) was calculated as 0.67 using value of M and F. As a result of the analysis, the population of M. barbatus from the Karatas coast of Iskenderun Bay was exploited over the optimum level because of overfishing pressure.
    Keywords: Goatfish, Red mullet, Population dynamics, Length, weight relationship, Mortality, Exploitation rate
  • Onkar Singh Brraich, Manjeet Kaur Pages 270-279
    Labeo rohita fingerlings were reared in freshwater and exposed to different concentrations of Lead Nitrate. After the exposure, one fish was sacrificed from each dose and the gill arches were removed. The ultrastructural changes on the gills of this cyprinid fish were investigated through scanning electron microscope (SEM). Lead treated gill tissues showed certain marked changes such as uplifting, hyperplasia and fusion of the secondary lamellae, swollen and distorted pavement cells, broken and swollen microridges, broken tips and upliftment of gill rakers, cellular extrusions, heavy exudation of mucous, disorganisation of secondary lamellae, etc. The changes were more rapid and intensive at higher concentrations as compared to lower concentration revealing that the alterations caused in the tissues of gills are highly dose dependent.
    Keywords: Cyprinidae, Rohu, Heavy metals, Histopathological changes, Pavement cells, Hyperplasia
  • Fariba Fazeli, Zohre Zarei, Abdol, Rahim Pazira, Tirdad Maghsoudloo, Saber Vatandoost Pages 280-286
    In the present study, some biological aspects of Capoeta trutta (Heckel, 1843) have been examined for the aim of future stock assessment, exploitation and conservational managements. A total of 103 fish specimens were collected seasonally from Seymareh River, Tigris basin, Iran, in four seasons during 2011-2012. Observed maximum age was 4 in both sexes and sex ratio obtained as 1M:1.9F. Analyses showed a highly significant length-weight relationship of 0.98 for C. trutta with a b parameter of 3.09. Generally, females were larger than males with the maximum length of 28.0cm and minimum of 9.8cm. Mean Relative Length of Gut (RLG), weight (W) and total length (TL) were calculated according to size classes and ages. The most frequent size belonged to 20-24cm length group with the percentages of 52.9 and 48.6 for females and males, respectively. Based on the results of main reproductive indices; Gonado-Somatic Index (GSI), Modified Gonado-Somatic Index (MGSI) and Dobriyal Index (DI), C. trutta spawns once a year in spring. Condition factor (K) value also revealed the peak in the spring which is in accordance with the highest gonadal maturity of this species. The mean value for RLG was obtained as 4.6 and Zihler’s index (ZI) was calculated as 2.11. Based on RLG and Zihler indices, C. trutta might be considered an herbivore species.
    Keywords: Cyprinids, Longspine scraper, Biology, Reproductive indices, Zihler's index, Tigris basin
  • Mohammad Reza Noei, Shaig Ibrahimov, Masoud Sattari Pages 287-295
    Although the Persian sturgeon, Acipenser persicus, is a commercially valuable sturgeon species of the Caspian Sea, but there are only few reports about its parasite fauna in the southern part of the Caspian Sea. In this study, a total of 209 individuals of Persian sturgeon were collected from two regions in the southwestern of Caspian Sea (Guilan Province, Iran) from March 2009 to May 2011. After recording their biometric characteristics, standard necropsy and parasitology methods were used for finding parasites. The nematodes were fixed in 70% ethanol and then cleared in lactophenol. The other worms were fixed in 10% buffered formalin and stained with aqueous acetocarmine. In this study, a total of 1396 worms belonging to six species, including two nematode species viz. Cucullanus sphaerocephalus and Eustrongylides excisus, two cestodes viz. Amphilina foliacea and Bothrimonus fallax, one digenean trematode, namely Skrjabinopsolus semiarmatus, and one acanthocephalan, namely Leptorhynchoides plagicephalus were found in 209 examined Persian sturgeons.
    Keywords: Acipenseriformes, Nematoda, Cestoda, Prevalence, Intensity
  • Yazdan Keivany, Mosayeb Aalipour, Masoud Siami, Samaneh Sadat Mortazavi Pages 296-298
    The length-weight relationships for three fish species from Beheshtabad River, Karun River Drainage (Western Chaharmahal and Bakhtiari Provinces, Iran) were investigated. The values of the slope parameter (b) in the length-weight relationship equations were determined as 2.79 for Capoeta damascina, 3.10 for Chondrostoma regium and 3.09 for Oncorhynchus mykiss, all of which were significantly different from the expected b=3 value, indicating a negative allometric growth pattern for Capoeta damascina and positive allometric growth patterns for Chondrostoma regium and Oncorhynchus mykiss.
    Keywords: Capoeta, Chaharmahal, Bakhtiari, Chondrostoma, Growth parameters, Oncorhynchus
  • Jaber Aazami, Abbas Esmaili, Sari, Asghar Abdoli, Hormoz Sohrabi, Paul J. Van Den Brink Pages 299-301
    The length-weight relationships, (LWRs) were calculated for 14 fish species belonging to five families (Cyprinidae, Cobitidae, Nemacheilidae, Salmonidae, and Gobiidae) collected from the Tajan River, north of Iran. Significant length-weight relationships with high correlation coefficients were found for all species.
    Keywords: LWRs, Caspian Sea, Biomass Estimations