Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 The first report on epicardial cavernous hemangioma in farmed sturgeon, Acipenser baerii, a microscopic survey 835 839 115482 10.22092/ijfs.2018.115482 EN Anahita Rezaie Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran Mojtaba Alishahi Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran Zahra TUlaby Dezfuly Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran Journal Article 2016 11 04 Haemangioma is a benign tumor of vascular endothelial cells or their progenitors. In spring of 2016, an Acipenser baerii, (+3 years, 2.2 kg weight) was reffered to the Department of Aquatic Animal Health, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz. After dissection it was found that the heart had a cobblestone appearance which was characterized by multiple dark red cysts with different sizes (2-5 mm). According to microscopic results, epicardial cavernous hemangioma was diagnosed. To the best of the author’s knowledge, this is the first report of primary epicardial cavernous hemangioma in Acipenser baerii.

https://jifro.areeo.ac.ir/article_115482_6aa6d12a63f6c6714f3c713055494daf.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Effects of endocrine disruption by 4-nonylphenol ethoxylate on the grwoth preformance and immune responses of female and male immature Koi carp (Cyprinus carpio carpio) 725 744 115509 10.22092/ijfs.2018.115509 EN P Amaninejad H Hosseinzadeh Sahafi M Soltani A Kamali T Naji Journal Article 2016 05 25 Nonylphenol (NP) is an endocrine disrupting chemical which has been shown to be able to modulate endocrine system of various organisms by different mechanisms. The objective of this study was to investigate the potential effects of 4-NP and 17-β-estradiol (E2) on immune parameters (IgM level and lysozyme activity) of Koi carp (Cyprinus the carpio carpio) in an attempt to expand the knowledge of the immune-reproductive system interactions. Fish were injected with ascending doses (10, 50,100 μg/g-1 body weight) of 4-nonylphenol (4-NP) and (2 μg/g-1 body mass) of 17-β-estradiol (E2) by vehicle during 3a weeks experiment. After 21 days, the fishes (180) were anesthetized, blood samples collected from their caudal vein, and after dissection, theywere grouped into male and female according to their gonadal characters. The results of plasmatic immune parameters measurement showed that 4-NP induced significant increase in IgM levels and lysozyme activity at 50μg/g -1 dosagewhile the their value decreased at higher doses of 4-NP (100 μg/g-1) compared with the control treatment (p<0.05). In addition,the treatment with 2 μg/g-1E2 injection, induced a significant decrease in IgM and lysozyme activity levels. These results indicated that 4-NP and E2 could potentially disturb the balance of immune system in immature koi carp with potential consequences for their endocrine interactions.

https://jifro.areeo.ac.ir/article_115509_090ee3601a35fdb92d11669ba1605511.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Effects of feeding levels on growth performance, feed utilization, body composition, energy and protein maintenance requirement of fingerling, rainbow trout, Oncorhynchus mykiss (Walbaum 1792) 745 762 116670 10.22092/ijfs.2018.119209. EN Imtiaz Khan University of Kashmir, Hazratbal, Srinagar, 19006, India Journal Article 2016 08 23 A 10-week feeding experiment was conducted to evaluate the effects of feeding level, energy and protein maintenance requirement of rainbow trout, Oncorhynchus mykiss, fingerling (5.65±0.45cm; 1.42 ±0.25g) by feeding casein-gelatin based purified diet (45% CP; 3.67 kcal g-1 GE) at six feeding levels 2-7% of BW/day in two equal meals, at 0800 and 1700 h, in triplicate, with 20 fish per trough fitted with continuous water flow-through system water volume 60L. Maximum live weight gain, best-feed conversion ratio (FCR), best specific growth rate (SGR) and highest protein efficiency ratio (PER) were reported with fish fed 4-5% BW day-1. However, quadratic regression analysis for weight gain, FCR, PER, protein retention efficiency (PRE) and energy retention efficiency (ERE) data indicated the break-points occurred at 5.33, 4.50, 4.48, 4.63 and 4.74% BW day-1, respectively. Body composition also produced significant (p<0.05) differences with respect to each feeding level, maximum protein, lowest moisture and intermediate fat contents were reported at 4-5% feeding levels. Protein and energy retention values also produced significant (p<0.05) difference among each feeding level with maximum values were reported at 5% feeding level. Based on the above results, it is recommended that feeding in the range of 4.6 to 5.3% BW day-1, corresponding to 2.07-2.39g protein and 16.88-19.45 kcal energy g100g-1 of the diet day-1 is optimum for the growth and efficient feed utilization of rainbow trout, while 2-3% feeding levels (0.90-1.35g protein and 7.34-11.01 kcal energy) suggests that these amounts approximate the maintenance requirement of fish.

https://jifro.areeo.ac.ir/article_116670_391e5e6640e7663eb4d59ba9c29e079d.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 The invitro effect of Methyl tert-butyl ether on liver, gill and kidney tissues of Rutillus caspicus 821 834 116829 10.22092/ijfs.2018.119526. EN Saeid Mohammadzadeh Baran Department of Marine Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran Ali Mashinchian Moradi Department of Marine Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran Issa Sharifpour Department of Marine Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran Iranian Fisheries Science, Research Institute, Agricutlural Research Education and Extension Organization, Tehran, Iran Shahla Jamili Department of Marine Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran Iranian Fisheries Science, Research Institute, Agricutlural Research Education and Extension Organization, Tehran, Iran Pargol Ghavam Mostafavi Department of Marine Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran Journal Article 2017 04 24 This study was conducted to evaluate the tissue of liver, gills and kidney Rutillus caspicus exposed to concentrations of 50, 100, 150 mg of Methyl tert-butyl ether, for 7, 14, 21 days. Average water temperature of 19±1 °C, water oxygen of 7.6 ± 0.2 mg/l and zero salinity were measured. A total of 156 fishes were studied in this experiment. In the first, second and third week of the test, three fishes were taken randomly from each aquarium. To examine the tissue, liver, gill and kidney were isolated, and using standard histological techniques, related microscopic slides were prepared for evaluation. Tissue damage in the liver includes: blood congestion، congestion of sinusoid، melano macrophage aggregation ، hepatocyte hypertrophy , vacuolation,degeneration، and cellular necrosis. Gill tissue damage includes: : hyperplasia، degeneration ,، lifting، telangiectasis،in secondary lamellae,blood congestion in primary & secondary lamellae، S formation of lamellae، reduction in length of secondary lamellae، lamellar fusion and cellular necrosis. Tissue damage in the kidney includes: tubular shrinkage، blood congestion ، melano macrophage aggregation،glomerular shrinkage، cellular necrosis، tubular degeneration، reduction in interstsial cells and interstisial hematopoietic tissue degeneration. The amount of damage in high concentrations of pollutants was higher, while gill , liver and kidney in the control group was observed in the normal outline. The result of this study showed that MTBE can cause damage in vital tissues of Rutillus caspicus and even, eventually leads to death.

https://jifro.areeo.ac.ir/article_116829_7027093f97e6b646ae5766adaf8bcc3d.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Effect of different salinity level on spawning, fertilization, hatching and survival of common carp, Cyprinus carpio (Linnaeus, 1758) in semi-artificial environment 790 804 116857 10.22092/ijfs.2018.116857 EN ABDUL MALIK CEMB, University of Karachi GHULAM ABBAS CEMB, University of Karachi ABDUL JABBAR Directorate of Fisheries Sindh, Livestock &amp;Fisheries Department, Govt. of Sindh, Pakistan SAJJAD SHAH Directorate of Fisheries Sindh, Livestock &amp;Fisheries Department, Govt. of Sindh, Pakistan ASADULLAH ALI CEMB, University of Karachi Journal Article 2017 03 10 The effects of various salinity levels among (0‰, 5‰, 10‰, 15‰, and 20‰) for successful breeding of Common carp, Cyprinus carpio were investigated. The duration of study was 75 days. Ripe broodstock (30) having a mean weight (male 1027±2.4g and female 1084.8±23g) were selected and stocked into spawning tanks (2000-liter). The Ratio among male and female was 2:1. They were fed with commercial floating pelleted feed having 35% crude protein with 2% body weight twice a day. Broodstock were injected with Ovaprim hormone 0.5 mg/kg female and male 0.2 mg/kg, respectively, after successful spawning broodstock were removed from spawning tanks. Results showed that the highest fecundity, fertility, hatchability and survival of fry were obtained on salinity of 0‰ to10‰ and significantly decreased on 15‰ and 20‰. The eggs per gram body weight were also recorded in all treatments and highest eggs were obtained, i.e. 45-60 per female on salinity of 0‰-10‰. Water temperature (22.4±0.2°C), dissolved oxygen (6.5±0.2 mg/L), pH (7.2±0.2) and ammonia (less than 0.03±0.06 mg/L) were monitored throughout the study period. Water quality parameters remained within the recommended range. Our results suggest that common carp, Cyprinus carpio may give maximum eggs up to 10‰ salinity with 81% survival of the fry.

https://jifro.areeo.ac.ir/article_116857_cfb00c3fb60e7b146da73e411af367f1.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Comparative study on bacterial flora of the intestine in Persian sturgeon (Acipenser persicus) fingerlings reared in fiberglass tanks and earthen ponds 629 640 116796 10.22092/ijfs.2018.116796 EN M Alizadeh Roodposhti Department of Aquatic Animal Health, International Sturgeon Research Institute, Agricultural Research, Education and Extension Organization (AREEO), P.O. Box: 41635-3464, Rasht,Iran. M Sattari Department of Fisheries, Faculty of Natural Resources, University of Guilan, Sowmehsara, Iran. P.O.Bax:1144 Hossein Khara Department of Fishery, Lahijan Branch, Islamic Azad University, Lahijan, Iran, P.O.Box: 66 A.r Shenavar Masouleh Department of Aquatic Animal Health, International Sturgeon Research Institute, Agricultural Research, Education and Extension Organization (AREEO), P.O. Box: 41635-3464, Rasht, Iran Journal Article 2015 05 04 Stability of bacterial flora in fish intestine is very important, because the intestine is an important organ for outbreak of microbial infections and other fish diseases especially when the fish have not been vaccinated. The aim of this study was to determine the bacterial flora of intestine in sturgeon juvenile in earthen ponds. The results can be applied to prevent the diseases occurrence and health management. In this study, 90 individuals of Persian sturgeon ranged 3-5g in weight collected randomly by trawling in 3 earthen ponds as well as 15 individuals ranged 10-20g in weight by small net in 3 fiberglass tanks. After recording morphometric characteristics, the intestine fish and rearing water were cultured on TSA medium. Gram staining and complementary tests were conducted. In order to identify the bacterial species, various biochemical experiments and diagnostic kits of API 20E (special for gram - negative bacteria) were employed. According to morphometric measurements, in earthen ponds the mean weight and length of juveniles were 5.59 ± 3.18 and 11.4 ± 2.9, respectively. The results showed that in these ponds the mean facultative aerobic and anaerobic bacterial counts in the juvenile intestine were 5.59 ± 0.92 (log CFU.g-1) compared to 6.67 ± 0.34 (log CFU.ml-1) in rearing water. Furthermore, the following bacteria were found in the intestine of Persian sturgeon: Aeromonas sp., A. sobria, A. hydrophyla, Entrobacteriaceae and Corynebacterium, while the bacteria recovered from the rearing water were Aeromonas sp. and A. sobria. According to morphometric measurements, in the fiberglass tanks, the mean weight and length of juveniles were 12.13 ± 2.51 (g) and 15.11 ± 1.13 (cm), respectively. The results showed that in these tanks, the mean facultative aerobic and anaerobic bacterial counts in the fish intestine were 4.77 ± 0.04 (Log CFU.g-1) compared to 4.81 ± 1 (Log CFU/ml) in rearing water. Furthermore, the following bacteria were identified in the intestine of Persian sturgeon: Aeromonas sp., Micrococcus, Staphylococcus. The bacteria in the rearing water were A. sobria, Acinetobacter, Moraxella, Micrococcus and Staphylococcus.

https://jifro.areeo.ac.ir/article_116796_9636a8426b88cc8dc5ec60bd259ee5fd.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 The effect of different feeding rates and restriction on the growth performance of Clarias gariepinus 840 847 116811 10.22092/ijfs.2018.116811 EN Oloyede Tiamiyu University of Agriculture Makurdi Victor Okomoda University of Agriculture Makurdi Helen Helen University of Agriculture Makurdi Journal Article 2015 06 26 This study seeks to investigate the effect of restricted feeding regimes at different rate on growth performance of Clarias gariepinus using static and flow through system. Fingerlings were divided into six batches for each systems with the first and second batch fed at 5% body weight (BW) every day and every other day respectively, the third and fourth batch were fed 10% BW every day and every other day respectively while the fifth and sixth batch were fed 15% BW every day and every other day respectively. Result obtained shows that fish fed every other day exhibited compensatory growth at 5% BW in the static system while in the flow through system fish grow better at all feeding rates when fed every other day. Increasing feeding rate however beyond 10% BW did not improve growth when fed every day or every other day in the static system due to poor water quality. This therefore implies that catfish farming can make more profit feeding African catfish at 5% body weight every other day in the static system and up to 15% body weight (every other day) in flow through system, hence taking advantage of the compensatory growth response phenomenon.

https://jifro.areeo.ac.ir/article_116811_60a33af7c244a19e3a93d340fb7cbcb5.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Assessment of water quality in the Wiśniówka River considering circulation of organic matter 690 712 116813 10.22092/ijfs.2018.116813 EN Marlena Socha Department of Water Sozology, West Pomeranian University of Technology in Szczecin Małgorzata Bonisławska Department of Water Sozology, West Pomeranian University of Technology in Szczecin Agnieszka Tórz Department of Water Sozology, West Pomeranian University of Technology in Szczecin Agnieszkka Rybczyk Department of Water Sozology, West Pomeranian University of Technology in Szczecin Arkadiusz Nędzarek Department of Water Sozology, West Pomeranian University of Technology in Szczecin Adam Tański Department of Hydrobiology, Ichthyology and Biotechnology of Reproduction, West Pomeranian University of Technology in Szczecin Rafał Pender Polish Angling Association Szczecin Journal Article 2015 10 23 Variation of hydrochemical conditions, with special reference to adequacy of waters as fish habitats, was traced based on selected hydrochemical parameters obtained during the studies conducted from February 2013 till February 2014 year. The results were compared with earlier studies. The sources of organic pollution were identified, and the effect of biogenic substances on the biomass, as well as the self-purification capability of the river, were assessed. The total suspension exceeded the requirements for waters which are habitats of both salmonid and cyprinid fishes. Compared to the previous years, the load of organic and inorganic matter in the waters of Wiśniówka River increased; this may have resulted from external inflow, neighbourhood of the hatchery but also, to a small extent, from internal supply. The high availability of nitrogen-(N-NH4+; N-NO2-, N-NO3-) and phosphorus-(total phosphorus; P-PO43-) based biogenic (substances favoured the biomass production, thus contributing to the increase in organic matter load in the river.

https://jifro.areeo.ac.ir/article_116813_d42088ddd382e0f98fc19e44c7947276.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Effects of seawater pH on survival, growth, energy budget and oxidative stress parameters of juvenile turbot Scophthalmus maximus 675 689 116814 10.22092/ijfs.2018.116814 EN W Shuang-Yao The Key Laboratory of Mariculture and Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, 116023, Liaoning, China Zhi-Qiang JIANG Dalian Ocean University, 116023, Liaoning, PR China M Ming-Guang The Key Laboratory of Mariculture and Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, 116023, Liaoning, China M Shou-Kang The Key Laboratory of Mariculture and Stock Enhancement in North China’s Sea, Ministry of Agriculture, Dalian Ocean University, 116023, Liaoning, China S Yang Dalian City Fisheries Technical Extension Station, 116023, Liaoning, China S You-Zhen Marine Fisheries Research Institute of Zhejiang, 316021, Zhejiang, China Journal Article 2015 10 11 This study aimed to elucidate the influence of environment pH on survival, growth, energy allocation and oxidative damage of juvenile Scophthalmus maximus (19.89±0.25 g). Six pH treatments (6.3±0.2、6.8±0.2、7.3±0.2、7.8±0.2、8.3±0.2、8.8±0.2) lasting for eight weeks were included. Measurements of survival (SR), feed conversion ratio (FCR), specific growth rate (SGR), weight gain rate (WGR), energy allocation, liver superoxide dismutase activity (SOD), catalase activity (CAT), and malondialdehyde concentration (MDA) were done. Results show that SR did not vary from pH 6.3 to 7.8, but reduced then significantly (P < 0.05); FCR raised remarkably (P < 0.05) while SGR and WGR decreased pronouncedly (P < 0.05). Most of the food energy was used in metabolism, followed by growth, feces loss and nitrogenous excretion. Energy deposited for growth showed a decreasing tendency when pH raised; while for metabolism showed a reverse trend. SOD showed insignificant difference from pH 6.3 to 7.8, but the activities then elevated obviously (P < 0.05) though a slight decrease was found from pH 8.3 to 8.8 (P > 0.05). CAT kept stable between pH 6.3 and 7.3, then sharply increased (P < 0.05), but no significant differences were found between pH 8.3 and 8.8 (P > 0.05). Subsequent decrease in MDA was found from pH 6.3 to 8.3 then the concentration smoothly increased. Overall, our results indicate that a pH in the range of 6.8 to 7.8 is recommended in the growth environment in cultivation of juvenile turbot.

https://jifro.areeo.ac.ir/article_116814_cb84f58669292a69af69999f64c70166.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Population growth and reproductive potential of five important fishes from the freshwater bodies of Bangladesh 657 674 116824 10.22092/ijfs.2018.116824 EN M.T Alam Department of Aquaculture, Sylhet Agricultural University, Sylhet, Bangladesh. M.A Hussain Departemt of Fisheries, Rajshahi University, Bangladesh. S Sultana Department of Zoology, Rajshahi University, Bangladesh. M.T Hasan Department of Aquaculture, Sylhet Agricultural University, Sylhet, Bangladesh. A.G Mazlan Institute of Tropical Aquaculture, University of Malaysia Terengganu, 21030, Kuala Terengganu, Malaysia. K.D Simon School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, University Kebangsaan Malaysia, 43600, UKM, Bangi, Selangor, D. E., Malaysia. Sabuj Kanti Mazumder Mazumder Assistant Professor Journal Article 2014 10 31 Population growth (length-weight relationship), and reproductive potential (e.g. fecundity, and sex-ratio) of five important fish species (‘mola’: Amblypharyngodon mola, ‘puti’: Puntius sophore, ‘tengra’: Mystus vittatus, ‘shing’: Heteropneustes fossilis and ‘taki’: Channa punctatus) collected from two important fresh waters bodies (namely Hilna beel and Beel Kumari beel) Rajshahi, Bangladesh, were studied. Population growth pattern by length-weight relationship (W=aLb) for the species differed, and exhibited positive allometric growth (P. sophore in Hilna beel), isometric growth (A. mola and C. punctatus in Hilna beel) and negative allometric growth (M. vittatus & H. fossilis in Hilna beel and A. mola, P. sophore, M. vittatus, C. punctatus & H. fossilis in Beel Kumari beel). The results denoted that the fecundity of mature females followed non-linear relationship (F=aLb) with total length and exhibited positive allometric growth (b>3) with some exception (A. mola in Hilna beel and M. vittatus in Beel Kumari beel). The fecundity of mature females also increased with total body weight and ovary weight following the linear relationship (F=a+bW). Differences in values of sex-ratios with seasons for all species in this study may have resulted from different environmental factors as well as breeding seasons. The findings of this study would be useful in imposing adequate regulations for the conservation of these fascinating fishes in the fresh water bodies of Bangladesh.

https://jifro.areeo.ac.ir/article_116824_5cfd74941057ad5e52bd4de2ca1d1b37.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Effect of black cumin oil (Nigella sativa) on the growth performance, body composition and fatty acid profile of rainbow trout (Oncorhynchus mykiss) 713 724 116826 10.22092/ijfs.2018.116826 EN Mustafa ÖZ Aksaray university, faculty of veterinary medicine Suat DIKEL Mustafa DURMUS Journal Article 2016 04 20 In this study, rainbow trout were fed for a total of 144 days with different feed mixes containing 0.00%, 0.10%, 0.40%, 0.70%, 1.00% and 1.30% black cumin oil. The effect of black cumin oil on the growth performance, feed content and fatty acid composition of rainbow trout was researched. The starting weight of fish in the experimental group was approximately 60 gr., which increased respectively to 215.21±4.12gr, 217.32±3.14gr, 235.12±2.9gr, 240.21±6.5gr, 260.14±4.7gr, and 258.89±1.6gr, while the difference in growth between the groups was observed to be statistically significant (p<0.05). Black cumin oil decreased the feed conversion rate of the fish. The addition of black cumin oil into the fish feed increased feed consumption and the daily feed consumed per fish was as follows, respective to each group; 0.93gr, 0.93gr, 0.97gr, 1.00gr, 1.02gr and 1.02gr. At the end of the experiment the economic conversion rates of the fish ($/Kg) were between 1.58 and 1.67, while the economic benefit index was between 0.60 and 0.72. The study showed that the protein efficiency rate and specific growth rates of the experimental group had been increased. The addition of black cumin oil to the feed increased the proportions of raw protein, oil and raw cinder in the trout and decreased the proportion of moisture, while also increasing the amounts of linoleic, oleic and stearic acids. In conclusion, the addition of 1.00% black cumin oil into the feed increases the fishes' growth performance and decreases costs.

https://jifro.areeo.ac.ir/article_116826_4d7fc5315796eb4e73cdb891e9cdb8ac.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Assessing benthic health of hard substratum macrobenthic community using soft bottom indicators and their relationship with environmental condition 641 656 116991 10.22092/ijfs.2018.116991 EN Neda Mehdipour Assistant Professor Mohammad Hassan Gerami Gonbad Kavous University Hanieh Nemati Journal Article 2016 04 15 This study aimed to assess ecological quality status of hard substratum macroinvertebrates communities of the Caspian Sea with three ecological indices and their relation with environmental factors. For this purpose benthic communities of the Caspian Sea basin were studied seasonally during 2014 in 8 sampling sites. Temperature, salinity, dissolved oxygen, pH, nitrate, nitrite, silicate and phosphate were measured as environmental factors. The benthic classification indices AMBI, M-AMBI and BENTIX were applied to assess the ecological status of the studied area. Results showed low dissimilarity based on species composition and abundance among seasons, while all seasons discriminated clearly based on environmental factors. In addition, AMBI index was more successful to assess ecological health of hard substratum in the Caspian Sea basin than M-AMBI and BENTIX. Furthermore, AMBI showed high sensitivity to environmental variation. Results indicated that temperature, nitrate, silicate, phosphate and nitrite were the most important factors in the composition and abundance fluctuation of hard substratum macroinvertebrates communities, respectively.

https://jifro.areeo.ac.ir/article_116991_6ae497cbac72f781d1516ee38d73487d.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Population assessment and yield per recruit of longtail tuna (Thunnus tonggol) in Northern of the Persian Gulf and Oman Sea (Iran, Hormozgan Province) 776 789 116992 10.22092/ijfs.2018.116992 EN Mohammad Darvishi Seyed Yousef Paighambari Rasoul Ghorbani Gorgan University) Farhad Kaymaram ifro Journal Article 2016 09 27 The purpose of this paper was to detail some important biological aspects of T. tonggol in coastal waters of Hormuzgan Province(Persian Gulf and Oman Sea). A total monthly data of 4383 individuals ranging from 25 to 124 cm fork length were collected from April 2015 to March 2016. The data were analyzed with FiSAT II software using the ELEFAN1 package to estimate the population parameters. The length-weight relationship was: TW=0.00002FL2.87(R2=0.97)and showed isometric growth for T. tonggol. Growth parameters were computed L∞=129.6 cm, K=0.39 year-1 and t0=−0.28 with the growth performance index, φ’ of 8.7. The total mortality(Z) estimated 1.58 year-1 using catch curve method. The natural(M) and fishing(Fcurr) mortality were obtained 0.49 year-1 and 1.09 year-1 respectively. The exploitation ratio was 0.69. Length at first capture (Lc) was estimated as 60.2 cm fork length. The yield per recruit (Y/R) maximized in maximum fishing mortality rate 0.85 year-1. The biomass per recruit decrease to 17.2% of unexploited biomass(Virgin biomass) at Fcurr The current fishing mortality exceed optimum fishing mortality(Fopt)and limit fishing mortality(Flimit)biological reference points. The results indicated that population of T. tonggol is overexploited in the Persian Gulf and Oman Sea and no scope for improving production of this species.

https://jifro.areeo.ac.ir/article_116992_a0d33bf003f12df78bf95a27e00ad24f.pdf

Agricultural Research,Education and Extension Organization Iranian Journal of Fisheries Sciences 1562-2916 17 4 2018 10 01 Identification of selected monogeneans using image processing, artificial neural network and K-nearest neighbor 805 820 117017 10.22092/ijfs.2018.117017 EN Elham Yousef Kalafi Institute of Biological Sciences, Faculty of Science, Boon Tan Wooi Institute of Biological Sciences, Faculty of Science, Christopher Town Computer Laboratory, University of Cambridge, Cambridge CB3 0FD, UK Sarinder Kaur Dhillon Institute of Biological Sciences, Faculty of Science, Journal Article 2017 06 21 Abstract Over the last two decades, improvements in developing computational tools made significant contributions to the classification of biological specimens` images to their correspondence species. These days, identification of biological species is much easier for taxonomist and even non-taxonomists due to the development of automated computer techniques and systems. In this study, we developed a fully automated identification model for monogenean images based on the shape characters of the haptoral organs of eight species: Sinodiplectanotrema malayanum, Diplectanum jaculator,Trianchoratus pahangensis, Trianchoratus lonianchoratus, Trianchoratus malayensis, Metahaliotrema ypsilocleithru, Metahaliotrema mizellei and Metahaliotrema similis. Linear Discriminant Analysis (LDA) method was used to reduce the dimension of extracted feature vectors which were then used in classification with the K-Nearest Neighbor (KNN) and Artificial Neural Network (ANN) classifiers for identification of monogenean specimens of eight species. The need for the discovery of new characters for identification of species has been acknowledged for log by systematic parasitology. Using overall form of anchors and bars for extraction of features were lead to achieve acceptable results in automated classification of monogenean. To date, this is the first fully automated identification model for monogeneans with an accuracy of 86.25% using KNN and 93.1% using ANN.

https://jifro.areeo.ac.ir/article_117017_360f4d1065089a3724ff681c7192a8e1.pdf