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  • 1
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    Community structure and seasonal distribution of intertidal macrofauna from two rocky shores of Karachi coast (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/27099 | 25017 | 2020-11-12 05:06:25 | 27099 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    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: Higher Education Commission of Pakistan
    Keywords: Biology ; Ecology ; seasonal distribution ; macrofauna ; Karachi coast ; Buleji ; Sunehri
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 137-154
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  • 2
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    Concentration of heavy metals (Fe, Zn, Mn, Cu, Pb and Cd) in Otolithes ruber (Bloch and Schneider, 1801) from Damb Fish Landing Centre at Sonmiani, Makran coast, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26628 | 25017 | 2019-06-05 06:48:04 | 26628 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Fish samples of Otolithes ruber (Bloch & Schneider, 1801) of various lengths (cm) and weight (g) were collected from Damb Fish Landing Centre at Sonmiani, Balochistan during 15th August 2009 to 15th April 2010. Total (56) fish samples were collected during the two major seasons Northeast Monsoon and Southwest Monsoon. The concentrations of Fe, Mn, Zn, Cu, Pb, and Cd were recorded in fish muscles. The mean concentration of Fe (4.23±1.38 μg/g), Mn (0.28±0.18 μg/g) and Cd (0.46±0.06 μg/g) were recorded in NE-monsoon. However Zn (3.34±1.19 μg/g), Cu (0.33±1.14 μg/g), and Pb (0.02±0.01 μg/g) showed highest concentration in SW-monsoon season. The results indicated that Fe concentrations were higher than other metals. Analysis of Variances (ANOVA) were performed in between seasons and metals, the significant difference was observed in Mn (P〉0.01 at 0.05) and Pb (P〉0.006 at 0.05) between seasons. The order of the metals in the fish samples based on concentrations in the tissues analyzed, as follows: Fe〉Zn〉Cu〉Mn〉Pb〉Cd. Results concluded that the concentration of metals did not exceed the permissible limit of the food regulations of international standards. Hence there is no health hazards to humans consuming of O. ruber.
    Keywords: Biology ; Fisheries ; Otolithes ruber ; Arabian Sea ; heavy metals ; Monsoon ; target hazard quotients
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 111-119
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  • 3
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    Determination of Fe, Zn, Pb and Cd in the lesser tigertooth croaker (Otolithes cuvieri Trewavas, 1974) (Sciaenidae) collected from Karachi Fish Harbor (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26546 | 25017 | 2019-05-30 12:49:40 | 26546 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: In this study, Fe, Zn, Pb and Cd have been measured in muscle tissues ofOtolithes cuvieri collected from Fish Harbour West Wharf Karachi, Pakistan during theyear of 2008. The Fe concentrations in fish tissues were 6 to 88 times higher than those ofother heavy metals. Cd was the lowest in the tissues. Fe, Zn, Pb and Cd levels in ediblemuscle of O. cuvieri ranged from 15 to 54 μg Fe/g, 2.56 to 9.43 μg Zn/g, 0.13 to 0.87 μgPb/g and 0.11 to 0.92 μg Cd/g, respectively.The values obtained lower as compared tomaximum permissible limit of the food regulations and international standards and wouldnot pose any health hazards to human consumption.
    Keywords: Biology ; Fisheries ; Pollution ; Otolithes cuvieri ; heavy metals ; Karachi coasts ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 7-12
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  • 4
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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
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  • 5
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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
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