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International Journal of Aquatic Biology - Volume:6 Issue: 1, Feb 2018

International Journal of Aquatic Biology
Volume:6 Issue: 1, Feb 2018

  • تاریخ انتشار: 1397/01/13
  • تعداد عناوین: 8
  • Ashkan Zargari, Mohammad Mazandarani *, Seyyed Morteza Hoseini Pages 1-7
    In the present study, the effects of safflower (Carthamus tinctorius) extract on serum antibacterial activity of rainbow trout (Oncorhynchus mykiss) against Aeromonas hydrophila, Streptococcus iniae and Yersinia ruckeri was studied. In this regard, 450 fish with average weight of 100±10 g were stocked into fifteen fiberglass tanks. This experiment consisted of 3 treatment groups (received 50, 100 and 200 mg/kg BW safflower extract via IP injection), one positive control group (just received normal saline) and one negative control group (with no injection). Blood samples were taken at the 3th, 7th and 10th days after the injections, and antibacterial activity of serum were determined in vitro using CFU method. The results showed that safflower extract injection had no significant effects on serum anti-bacterial activity against A. hydrophyla and Y. rukeri during 10 days post injection. However, in the fish receiving 100 mg/kg safflower extract, serum bactericidal activity against S. iniae was significantly higher than the other groups. This study demonstrated that safflower extract at the doses of 50-200 mg/kg via IP injection did not cause significant changes in serum antibacterial activity against A. hydrophila and Y. ruckeri, but injection of 100 mg/kg extract led to an increase in the serum antibacterial activity against S. iniae, in rainbow trout.
    Keywords: Antibacterial activity, Safflower, Serum, Injection
  • Atta Mouludi-Saleh, Yazdan Keivany *, Seyed Amir Hossein Jalali Pages 8-14
    For comparison of meristic characters of Squalius turcicus, in 12 rivers of Caspian Sea basin, 535 specimens were captured. Some 14 meristic characters were counted. Classification of meristic characters showed that most specimens of all populations have 8 soft dorsal rays, 9 soft anal rays, 19 branched caudal fin rays, 15 soft pectoral rays, 9 soft pelvic rays, 41-47 lateral line scales, 7-9 scales above LL, 3-5 scales below LL, 18-21 predorsal scales and 14-16 circumpeduncle scales. The results showed significant differences (P
    Keywords: Cluster Analysis, Kolmogorov, Smirnov, Meristic, Morphology
  • Bhushan Kumar Sharma *, Sumita Sharma Pages 15-20
    Our plankton and semi-plankton collections from India revealed 14 species of Testudinella including two undetermined species yet awaiting descriptions. The Oriental endemic T. insinuata is a new record from India while the Australasian T. walkeri and the palaeotropical T. brevicaudata and T. greeni are other globally interesting species. Testudinella amphora, T. brevicaudata, T. dendradena, T. greeni, T. parva semiparva, T. tridentata and T. walkeri are characterized by distribution restricted till date to northeast India (NEI); T. insinuata is restricted to the floodplains of the Kashmir valley of Jammu and Kashmir state of western Himalayas; and T. incisa and T. mucronata are known for valid reports from Tamil Nadu and Jammu and Kashmir, respectively. T. emarginula, T. patina and T. tridentata are believed to be cryptic species-complexes and thus desired ecological and genetic analysis of local populations. This study merits interest vis-à-vis biodiversity and distribution of the Indian Rotifera.
    Keywords: Biodiversity, Interesting elements, Littoral, periphytic rotifer, Richness
  • Vinod Kumar Mudumala, Mahesh Kumar Farejiya, Kiran S. Mali, Karri Rama Rao *, Pradnya Sawant Ankush, Siva Anandhan Pages 21-24
    Kawakawa, Euthynnus affinis contributes to the tune of 35,466 tonnes forming 1% to the total marine fish landings of India. Investigations on growth and mortality were of this species carried out based on the length frequency data during 2008-2012. The length-weight relationship for the pooled samples were derived for intercept a=0.0286, slope b=2.857 and coefficient of determination r2=0.917. The values obtained for growth parameters of L∞ was 67.86 cm, for growth coefficient (K) 0.70 and for to -0.26y-1. The natural, total and fishing mortalities recorded as 0.86, 1.48 and 0.62 y-1,respectively. The exploitation ratio (F/Z) was observed as 0.42. The M/K ratio was estimated at 1.23. The average fork length of 46 cm and weight of 2024 g were estimated in the samples collected. The length at the end of 1st year to 5th year was observed to be 33, 52, 64, 70 and 75 cm, respectively. The fishing mortality derived in this study is more than the optimum and limit value indicated the sign of overexploitation.
    Keywords: Asymptotic length, Mortality, Exploitation ratio, Length at age
  • Masoumeh Ariyaee, Amir Hossein Hamidian *, Soheil Eagderi, Sohrab Ashrafi, Hadi Poorbagher Pages 25-30
    Heavy metals are released to aquatic ecosystems from natural and anthropogenic recourses and accumulate to the body of organisms. This study aimed to assess the accumulation of As and Cd in the gill, liver, and muscle of the toothed carp Aphanius arakensis in salt water exposed to three concentrations of Cd and As (5, 10 and 20 mg L-1) for 18 days. The specimens were collected from the Shoor River with an average weight of 1.5±0.3 g (mean±SD) and length of 3.4±0.4 cm. The findings showed that the bio-concentration factor (BCF) of Cd and As were in the following order: liver > gill > muscle, however, for 5 ppm of As the order was gill > liver > muscle. BCF in As concentrations were more than Cd concentrations. Also, the highest BCF was found at 5 ppm. The present study showed that the liver is the organ that accumulates the highest concentrations of As and Cd.
    Keywords: Toxicity, Heavy metals, Organs, BCF
  • Meysam Shakoori *, Seyed Hossein Hoseinifar, Hamed Paknejad, Valiollah Jafari, Roghieh Safari Pages 31-36
    The present study investigates the effects of dietary lysozyme on growth performance and haematological indices of rainbow trout (Oncorhynchus mykiss) fingerlings. One hundred and twenty Juvenile rainbow trout fish (initial average weight 5.46±0.05 g) were fed on varying levels of dietary lysozyme (0, 0.5, 1 and 1.5 g kg-1) for 8 weeks. Thereafter, growth performance as well as haematological indices including WBC, RBC and Hct were measured. Evaluation of growth performance showed no significant increase in fishes fed on different levels of dietary lysozyme (P>0.05). Also, feeding on dietary lysozyme significantly increased WBC compared control (P
    Keywords: Lysozyme, Rainbow trout, Growth performance, Haematology
  • Victor Oscar Eyo, Emmanuel Offiong Effanga Pages 37-43
    The objective of this study was to determine the abundance, intensity and prevalence of ectoparasites of Synodontis schall from the Cross River Estuary, Nigeria. A total of 150 fresh samples were collected between May and October, 2013 from the catches of the artisanal fisheries at Nsidung beach. The skin, gill and fin scrapping were prepared from each specimen and examined following standard methods for microscopic analysis. The results showed that 21 specimens were infested with 77 ectoparasites belonging to five species, including Trichodina sp., protozoan cyst, Ergasilius lizae, Dactylogyrus sp. and Gyrodactylus sp. with an overall prevalence of 14.0%. Infestation rate was highest in 10-14.9 cm class size (53.55%), followed by 15-19.9 cm (34.00%), ≥20.0 cm (8.00%) and 5-9.9 cm (4.67%) size classes. Parasites were more prevalent in the gills (82%), followed by the skin (14%) and least (4%) in the dorsal fin. Prevalence and abundance of ectoparasites was highest (28.57% and 0.71) in 5-9.9 cm size class, followed by 10-14.9 cm (16.25% and 0.60), 15-19.9 cm (9.80% and 0.41) and ≥20.0 cm (8.33% and 0.25) classes. Prevalence and abundance of ectoparasites was higher in female (15.63% and 0.56) than male (11.11% and 0.43). Dactylogyrus sp., Trichodina sp., protozoan cyst and E. lizae exhibited organ specificity as they were specifically recovered from the gills whereas Gyrodactylus sp. was found in the skin and fin. However, it was concluded that to prevent zoonosis, S. schall should washed with clean water and cooked properly before consumption.
    Keywords: Ectoparasitic infestation, Abundance, Intensity, Prevalence
  • Olusola Adeniyi Babalola, Murisiku Onigemo, Deborah Olude Pages 44-48
    The study was carried out to determine the growth performance of Clarias gariepinus fingerlings cultured in the circular plastic ponds and fed diets containing varying level of cassava dough (fufu) kitchen waste at 0, 2.5, 5, 7.5, and 10% levels of inclusion. Two hundred and twenty-five fingerlings were randomly distributed into five treatments, which were replicated thrice-using completely randomize design. While the diet with 0% serves as a control. Clarias gariepinus with average initial weight of 10 g were stocked at the rate of 15 fishes per replicates. The result shows that there were no significant different among the treatment as compared with mean weight gained, feed intake, specific growth rate, protein efficiency ratio, and feed conversion ratio. Clarias gariepinus fingerlings fed with 2.5% level of inclusion of cassava dough kitchen waste had the highest weight gained with the value of 11.66 g, followed by treatments 1, 4, 3 and 5, respectively. The result shows that the feed with 4.96% of cassava dough kitchen waste has the highest feed intake, specific growth rate, protein efficiency ratio and feed conversion ratio. Therefore, a diet with 4.96% level of inclusion of cassava dough kitchen waste is hereby recommended to be in the diet of C. gariepinus fingerlings for economic reasons over maize.
    Keywords: Feeding, Fingerlings, Cassava dough, Kitchen waste