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  • ASFA_2015::H::Heavy metals  (3)
  • ASFA_2015::M::Marine biology  (1)
  • 1
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    Determination of mercury (Hg) in two sea cucumber species Ohshimella ehrenbergii ‎‎(Selenka, 1868) and Stolus buccalis (Stimpson, 1855) from the Karachi ‎coast. (2021)
    Details
    Publication Date: 2021-06-09
    Description: In this study the amounts of mercury (Hg) were determined in tentacles and muscle ‎tissues of O. ehrenbergii and S. buccalis from two coastal sites of Karachi; Buleji and ‎Sunehri during Southwest monsoon (August and September) and Northeast monsoon ‎‎(December and January) seasons of the year 2018. The mean amounts of Hg in edible ‎tissues of sea cucumbers were as follows: O. ehrenbergii (0.0176 mg/kg dry wt.) and S. ‎buccalis (0.0155 mg/kg dry wt.). Hg amounts in muscles of both species are much lower ‎than the maximum permissible limits (0.5 mg/kg wet wt.). Estimated Daily Intakes for ‎adults consuming O. ehrenbergii and S. buccalis are lower than published RfD values. ‎Total Target Hazard Quotient (TTHQ) values (0.00787) are also lower than 1, it may be ‎concluded that the consumption of these sea cucumbers from Karachi, do not pose any ‎health hazards to human as Hg amounts were concerned.‎
    Description: Published
    Description: Refereed
    Keywords: Ohshimella ehrenbergii ; Stolus buccalis ; Mercury‎ ; Buleji ; Sunehri ; Karachi‎ ; estimated daily intakes‎ ; target hazard quotient ; ASFA_2015::P::Pollution ; ASFA_2015::M::Mercury ; ASFA_2015::M::Marine invertebrates ; ASFA_2015::B::Bioaccumulation ; ASFA_2015::T::Toxicants ; ASFA_2015::H::Heavy metals
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 55-62
    Location Call Number Limitation Availability
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  • 2
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    Heavy metal accumulation in sea cucumber ‎Actinopyga mauritiana (Echinodermata-‎‎Holothuroidea) from Cape Monze Beach Karachi, ‎Pakistan‎. (2021)
    Details
    Publication Date: 2021-05-19
    Description: In the present study sea cucumber Actinopyga mauritiana, water and sediment samples ‎collected during September to December 2018. Six heavy metals (Fe, Cu, Mn, Zn, Pb, ‎and Cd) were analyzed in tissues (muscles, tentacles and guts), water and sediment by ‎atomic absorption spectrophotometer (AAS). The average measured levels of heavy ‎metals Fe, Cu, Mn, Zn, Pb and Cd in A. mauritiana muscle, tentacle and gut was 42.20 ± ‎‎9.47, 3.14 ± 0.48, 0.38 ± 0.22, 11.42 ± 4.34, 0.03 ± 0.00 and 0.02 ± 0.00; 36.90 ± 8.14, ‎‎3.22 ± 0.60, 0.40 ± 0.27, 10.50 ± 1.70, 0.04 ± 0.05 and 0.03 ± 0.02; 21.54 ± 5.06, 2.32 ± ‎‎0.66, 0.53 ± 0.16, 13.13 ± 2.90, 0.02 ± 0.02 and 0.02 ± 0.01 μg g−1 respectively. It is ‎useful to monitor all metal accumulation in the future.‎
    Description: Published
    Description: Refereed
    Keywords: sea cucumber‎ ; Actinopyga mauritiana ; ASFA_2015::C::Chemistry ; ASFA_2015::H::Heavy metals
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 51-62
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  • 3
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    Heavy metal levels in elongate sole (Solea ‎elongata Day, 1877) from the Korangi ‎Fish ‎Harbour, Karachi, Pakistan.‎ (2021)
    Details
    Publication Date: 2021-05-19
    Description: In this study, fish samples collected from Elongate Sole (Solea elongata Day, 1877) ‎caught on the Korangi Fish Harbour in 2018 (South-west Monsoon and North-east ‎Monsoon) were analysed to determine concentrations of heavy metals: Fe, Zn, Cu, Pb, ‎Mn and Cd by an atomic absorption spectrophotometer, expressed per unit of dry weight ‎of each sample. The average measured level of Fe, Zn, Cu, Pb, Mn and Cd for Solea ‎elongata was 38.716±11.321 μg g−1, 16.638±3.344 μg g−1, 1.067±0.404 μg g−1, ‎‎0.022±0.043 μg g−1, 0.273±0.100 μg g−1 and 0.022±0.010 μg g−1, respectively. Although ‎the contamination values obtained from Solea elongata are below the limits, it is ‎important to follow the metal accumulation values.‎
    Description: Published
    Description: Refereed
    Keywords: Solea elongata ; accumulation ; elongate sole ; ASFA_2015::H::Heavy metals ; ASFA_2015::C::Chemistry
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 39-45
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  • 4
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    Community structure and seasonal distribution of intertidal macrofauna from two rocky ‎shores of Karachi coast. (2021)
    Details
    Publication Date: 2021-07-01
    Description: Rocky shores are considered heterogeneous environments due to their composition and ‎structure. Therefore, they support numerous habitats for flora and fauna. Organisms ‎found on rocky shores are facing intense physicochemical conditions during tidal ‎changes from upper to lower intertidal zones. Total (N=1888) specimens were collected ‎on seasonal basis from intertidal zone during low tide from two rocky sites of Karachi ‎coast, Buleji and Sunehri during January 2017 to December 2017. The highest number ‎of individuals (N=1041), were recorded from Buleji than Sunehri (N= 847). The seasonal ‎abundance in Mollusca were measured as (36.84%), (63.67%), (25.08) and (40.38%) ‎from Buleji while from Sunehri (45.16 %), (46.01%), (48.65) and (42.79 %) during pre-‎monsoon, south-west monsoon, post monsoon and north-east monsoon season ‎respectively. Group Arthropoda, Mollusca and Echinodermata were shows the highest ‎abundance of the species at both sites as compare to other groups. The highest diversity ‎index from Sunehri (H'=0.64) was measured in north-east monsoon season meanwhile, ‎‎(H'=0.61) was measured in post monsoon season from Buleji coast. Evenness index ‎‎(J'=0.25) in pre-monsoon season from Buleji and (J'=0.28) in south-west monsoon season ‎from Sunehri coast . Season shows the great abundance of species as compare to other ‎seasons. No significant correlation was observed in between seasons, water temperature ‎and salinity with macrofauna groups at both sites. ‎
    Description: Published
    Description: Refereed
    Keywords: seasonal distribution‎ ; macrofauna‎ ; Karachi coast‎ ; Buleji ; Sunehri ; ASFA_2015::S::Seasonal variations ; ASFA_2015::M::Marine biology ; ASFA_2015::C::Community composition ; ASFA_2015::S::Species diversity ; ASFA_2015::S::Species composition ; ASFA_2015::S::Seashore ecology ; ASFA_2015::R::Rocky shores
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 137-154
    Location Call Number Limitation Availability
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