Seyed Daryoush Moghaddas; Asghar Abdoli; Bahram Hassanzade Kiabi; Hossein Rahmani
Abstract
Introduction: The intentional and unintentional introduction of non-native fish species to the aquatic ecosystems of Iran has occurred with purposes such as enhancing aquaculture, ornamentation, biological control, and research. Some of them cause or have the potential to cause, significant environmental ...
Read More
Introduction: The intentional and unintentional introduction of non-native fish species to the aquatic ecosystems of Iran has occurred with purposes such as enhancing aquaculture, ornamentation, biological control, and research. Some of them cause or have the potential to cause, significant environmental and socio-economic impacts on aquatic ecosystems and/or fish farms. The eradication of non-native fishes is impossible or very costly, especially in large areas. Screening and identifying the potential invasiveness of species are being increasingly used all over the world. The main aim of the present research was to assess the potential invasiveness of redbelly Tilapia Coptodon zillii in Anzali international wetland. Material and methods: Aquatic Species Invasiveness Screening Kit (AS-ISK) was used to identify redbelly Tilapia Coptodon zillii as a non-native fish that may pose a high potential risk of becoming invasion in Anzali Wetland. The model is able to discriminate between invasive and non-invasive aquatic organisms including non-native fishes by risk area-related threshold value. Also, the Köppen-Geiger climate system and Climatch software were used to match the climate between the native range of redbelly Tilapia and Anzali Wetland. The projected future climate change scenario was taken from relevant studies to carry out Climate Change Assessment (CCA) of the AS-ISK. Results and discussion: The output of the AS-ISK was 44 for redbelly Tilapia that was higher than the AS-ISK threshold value of the risk assessment area, which meant that the species pose a potential risk of becoming invasive in Anzali wetland. There was a high climate-mating between the native range of redbelly Tilapia and the assessed area when the Köppen-Geiger climate system was used. At least one native habitat of redbelly Tilapia in the system was in the same climate category as the studied area. Also, the Climatch model output was 0.87 that shows a high climate matching for the non-native fish. The CCA had an increasing effect on the total score of the AS-ISK. The factors that increased the AS-ISK score were climate-mating, probable climate change, biological attributes, and invasiveness history of other places that the species was introduced. The comparison of the results of this study and other relevant studies that used AS-ISK to assess potential invasiveness of redbelly Tilapia showed that the species had the potential of becoming an invader in Anzali Wetland as well as some other areas around the country. Conclusion: While non-native fishes are frequently used to enhance aquaculture in the country, a rapid assessment tool is required to avoid nuisance environmental impacts. The AS-ISK can be reliably used as a tool to predict the potential risk of becoming invasive in Anzali Wetland and elsewhere to be used by conservation managers, decision-makers, and policymakers in the aquaculture development plans.
Kamal Khezri; Asghar Abdoli; Bahram Hasanzadeh Kiabi; Hussein Valikhani; Jaber Aazami
Abstract
Introduction: Nowadays, many indicators have been developed to assess water quality and ecological classification of rivers based on variations in ecological structure. The goals of the study were assessing the ecological status, the effects of human land use, and the performance of the most common ecological ...
Read More
Introduction: Nowadays, many indicators have been developed to assess water quality and ecological classification of rivers based on variations in ecological structure. The goals of the study were assessing the ecological status, the effects of human land use, and the performance of the most common ecological indices for fishes and macroinvertebrates as biological evaluation of the Jajrood River. Material and methods: In the present study, sampling of water, macroinvertebrates, and fishes was done at 10 stations in November 2015. The physical, chemical, and biological parameters including temperature, turbidity, velocity and depth of water, acidity, electrical conductivity, BOD5, nitrate, ammonium, phosphate, dissolved oxygen, and fecal coliform were measured on-site or after the sampling. Macroinvertebrates sampling was performed using a Surber sampler with three replications at each station and fishes were sampled using an electrofishing apparatus. Different physicochemical, macroinvertebrates, and fish indices were used to evaluate the integrity of the Jajrood River. The Canonical Correspondence Analysis (CCA) test was also used to analyze the relationship between macroinvertebrates and fishes with physical, chemical, and biological variables. Results and discussion: Overall, 481 specimens belonging to eight species of fishes and 2435 macroinvertebrates belonging to 15 families were collected. Among all sampled fishes, Oxynoemacheilus bergianus and Paracobitis malapterura had the highest and lowest abundance, respectively. The highest total percentage of macroinvertebrates abundance belonged to the Baetidae family of the order Ephemeroptera and the lowest percentage belonged to the Polycentropodidae of the order Trichoptera. The results of Canonical Correspondence Analysis (CCA) showed that the efficiency of the EPT/CHIR index for macroinvertebrates was better than others. The Karr Biotic Integrity (KBI) that was used for fishes as a water quality index was suitable for the river. Conclusions: The present study was the first one that used both fishes and macroinvertebrates indices with physicochemical parameters for ecological integrity assessment. From the findings of this study, it can be concluded that the urban-rural and agriculture wastewaters and the Latyan dam had the most negative impact on the ecological structure of the river.
Ehsan Parvane Aval; Maede Dehghani Tafti; Bahram Kiab
Volume 7, Issue 2 , January 2010
Abstract
This survey was undertaken during seven months (March – October) in 2007 in the Sabzevar region.The lizards were captured on seven one-ha plots (100m×100m), based on vegetation change. The lizards were sampled using two methods: the first consisted of padding and the second sampling method ...
Read More
This survey was undertaken during seven months (March – October) in 2007 in the Sabzevar region.The lizards were captured on seven one-ha plots (100m×100m), based on vegetation change. The lizards were sampled using two methods: the first consisted of padding and the second sampling method was accomplished using pitfall trapping. For the latter, twenty pitfall traps were established in each plot and were placed in a random-systematic design within a plot. Overall, we captured 151 specimens belonging of four familes, eight genera and 12 species. For measuring the diversity we used the Shannon-Wiener,N1, Simpson andHill indices and, for measuring evenness, we used theCamargo,Simpson and Smith and Wilson indices. In addition, we used the Rarefaction Method for equating data and measuring species richness. Finally, with regard to the results obtained by the different indices we found that, the relationship between crown coverage and species diversity, evenness, richness and abundance has a positive correlation. For the diversity indices, these were: Shannon-Wiener (r=0.84, R2=0.70), N1(r=0.65, R2=0.42), Hill (r=0.81, R2=0.65), Simpson (r=0.82, R2=0.67). For the evenness indices: Simpson(r=0.3, R2=0.01), Smith and Wilson (r=0.5, R2=0.25) and Camargo (r=0.36, R2=0.13). In addition, another positive correlation was shown between crown coverage and species abundance (r=0.97, R2=0.93) and species richness (r=0.77, R2=0.6).
Hossein Rahmani; Bahram Hassanzadeh Kiabi
Volume 6, Issue 3 , April 2009
Abstract
A study was conducted to determine suitable characters for separating 2 Shemaya ( Chalcalburnus chalcoides ) populations of Haraz and Gazafrud Rivers in spring 2004. Using cast net, 73 speciemens were collected in 2 rivers ( i.e: 35 in Gazafrud vs. 38 in Haraz ). 27 morphometric characters, 11 meristic ...
Read More
A study was conducted to determine suitable characters for separating 2 Shemaya ( Chalcalburnus chalcoides ) populations of Haraz and Gazafrud Rivers in spring 2004. Using cast net, 73 speciemens were collected in 2 rivers ( i.e: 35 in Gazafrud vs. 38 in Haraz ). 27 morphometric characters, 11 meristic characters and 20 proportional morphometric characters were used. PCA in SPSS software was used to determine the best separating ( isolating ) characters of populations and its separation distance. For morphometric characters, 8 factors with about 77/2 % of character diversity within individuals were selected including; total length, fork length bodydepth, head length and premaxillalength. In the case of meristic characters, four factors with 70/75 % of diversity of characters within individuals were selected including; caudalpeduncle scales, scalerows above lateral line and gill reakers ( anterior ). As far as proportional morphometric character are concerned, seven factors with 81% of character diversity within individuals were selected including 1 character. The results showed while morphometric as well as proportional morphometric characters were useful for population separation, the meristic characters could not separate the populations.
Gholam Reza Banagar; Mahmoud Karami; Bahram Kiabi; Mahmoud Ghasempouri
Volume 6, Issue 2 , January 2009
Abstract
Fish diversity of Haraz River Was Studied from November 1999 To August 2000. This river is situated in The Southern Caspian basin of Iranian Mazandaran Province. Five Stations Were Selected along The River. 522 specimens were Collected and studied, that belonged to 20 species and 9 families: Petromyzontidae, ...
Read More
Fish diversity of Haraz River Was Studied from November 1999 To August 2000. This river is situated in The Southern Caspian basin of Iranian Mazandaran Province. Five Stations Were Selected along The River. 522 specimens were Collected and studied, that belonged to 20 species and 9 families: Petromyzontidae, Cyprinidae, Cobitidae, Salmonidae, Gobiidae, Mugilidae,Balitoridae,Poeciliidae and Gasterosteidae.Cyprinids comprised 67.2 percent of the species. Seventy percent of species were resident and 30 percent anadromous. Rain bow trout (Oncorhynchus mykiss), Gold fish (Carassius auratus), (Liza saliens) and Stickle back (Gasterosteus aculeatus) and Gambusia (Gambusia holbrooki) were introduced species. Shannon- Wiener's coefficient of diversity (H'), Food selectivity and Horn's coefficient of niche overlap were estimated.
Behrouz Behrouzi Rad; Bahram Hasan Zadeh Kiabi
Volume 5, Issue 3 , April 2008
Abstract
Tiab and Kolahy estuaries are regarded as part of the Ramsar sites, that are located in the delta of Rud Shirin, Rud Shour and Minab River 37o 05' N 56o 50' E. The total area of the region is about 20000 ha. In this study, 96 species from 27 families of the birds of Iran were recognized at these wetlands.Fifty ...
Read More
Tiab and Kolahy estuaries are regarded as part of the Ramsar sites, that are located in the delta of Rud Shirin, Rud Shour and Minab River 37o 05' N 56o 50' E. The total area of the region is about 20000 ha. In this study, 96 species from 27 families of the birds of Iran were recognized at these wetlands.Fifty seven species were waterbirds. Species of White and Dalmation Pelicans,Great Cormorant, Greazer Flamingo and some Gulls and Terns were counted monthly in this survey. All species were migrant birds. Density of birds population in Kolahy was 2/99 and in Tiab 3,00 per hectare. There was no significant statistical difference between populations and species diversity of any known species in both estuaries. The bird's population in both wetlands were maximum in winter and minimum in summer, from which 60% were Fish-eating, 35% omnivores and the remaining were Plankton-eater.Dalmation Pelican Pelecanus crispus, one of the threatened species observed in winter in both estuaries. Diversity of Sternidae with 9 species was more than the other bird family and Phoenicopterus ruber and Phalacrocorax carbo with one species werethe families with lowest bird species number.
Hossein Rahmani; Bahram Hasanzadeh Kiabi
Volume 3, Issue 10 , January 2006
Nahid Nahavandi; Masoud Sheidai; Alireza Mirzajani; Bahram Hasanzadeh Kiabi
Volume 2, Issue 5 , October 2004
Hossein Mostafavi; Bahram Hasanzadeh Kiabi; Houman Liaghati
Volume 2, Issue 5 , October 2004
Fariba Ataei; Mohammad Pourkazemi; Bahram Hasanzadeh Kiabi; Masoud Sheidai
Volume 1, Issue 2 , January 2004
