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  • Aquaculture  (2)
  • 1
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    Short communication: Determination of total mercury in common carp, Cyprinus carpio, large scaled barb, Barbus grypus, tiger tooth croaker, Otolithes ruber and from surface waters in Khuzestan, Iran (2021)
    In:  http://aquaticcommons.org/id/eprint/23122 | 18721 | 2018-06-18 16:57:22 | 23122 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-13
    Description: Fishes are a valuable source of dietary protein and minerals for seafood consumers and are also used in pharmaceutical products (Mozaffarian, 2009). Over the past several decades aquatic ecosystems have been extensively contaminated with pollutants released from domestic and industrial waste waters and other anthropogenic activities in Khuzestan, Iran. Heavy metals such as mercury are considered as one of the four most important pollutants of aquatic life because of their high toxicity and ability to bioaccumulate in tissue of aquatic organisms (Hajeb et al., 2009). The toxicity of Hg is highly dependent on its chemical form. Organic mercury compounds are more toxic than inorganic mercury salts which may bioaccumulate to levels that could increase health risks to seafood consumers (Syversen and Kaur, 2012). Since most mercury in fish tissue is present as methyl mercury (Me-Hg), it has been recommended that T-Hg in tissues can serve as a surrogate for Me-Hg (Kannan et al., 1998).
    Keywords: Aquaculture ; Chemistry ; Fisheries ; Pollution ; Fish ; Mercury ; Muscle ; Water ; Khuzestan Province ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 844-850
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  • 2
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    Effect of male age in Caspian brown trout, Salmo trutta broodstock on reproductive performance (2021)
    In:  http://aquaticcommons.org/id/eprint/22778 | 18721 | 2018-05-21 21:47:48 | 22778 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-10
    Description: In this study, three different age groups of male broodstocks (4, 5 and 6 years respectively) were used to fertilize eggs obtained from nine females. The results showed that 6 year old males had maximum body weight (1766 g), total length (56.3 cm) and sperm volume (31.83 ml). Results did not show significant difference in spermatocrit and spermatozoa concentration among age groups (p〉0.05). Our study showed maximum fertilization rate (98.5 %), survival rate until eyes pigmentation (91.17 %), hatching rate (94.5 %) and survival rate until absorption of yolk sack (97.16 %) for 4 years treatment group. Such positive relationships were detected between sperm production characteristics (spermatozoa concentration, spermatocrit and sperm volume) and fertilization parameters. Based on our results, it can be concluded that 4 year old males have high efficiency leading to fertilization success.
    Keywords: Aquaculture ; Biology ; Fisheries ; Age ; Male ; Artificial insemination ; Salmo trutta ; Biology ; Physiology ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 328-335
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