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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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    Length-weight relationship in Pomadasys maculatus (Bloch, 1793) (family: Haemulidae) collected from Karachi Fish Harbour (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26575 | 25017 | 2019-05-31 14:23:03 | 26575 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: A total of 72 indivisuals of Pomadasys maculatus were collected from Karachi Fish Harbour during January 2011 to December 2011. The maximum mean length (31.4 ± 1.90 cm) and weight (177.96 ± 1.46 g) was recorded in post-monsoon season. The lowest mean length (30.2 ± 3.49 cm) and weight 170.05 ± 1.37 g) was recorded in monsoon and pre-monsoon season. Highest mean of relative condition factor (0.62 ± 0.01) was observed in monsoon season and the lowest mean of CF (0.58 ± 0.01) was measured in post-monsoon season. Length–weight relationships were calculated using the data of all fish samples measured (W =0.05388053 × L 1.4101). No significant differences were observed in season and length-weight relationship of fish.
    Keywords: Biology ; Fisheries ; Length-Weight Relationship ; Pomadasys maculatus ; Karachi Fish Harbour.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 27-31
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  • 3
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    Distribution of major zooplankton groups in Ketibander creek system (Indus delta) during monsoon season (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26581 | 25017 | 2019-06-02 07:38:13 | 26581 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: The aim of present study was to investigate the occurrence andcomposition of major zooplankton groups from two permanent stations (station # 1Ochito creek and station #2 Khuni creek) in Ketibander creek system Indus deltaic areaduring monsoon season (May to July 1997) There is no data/information available on thezooplankton communities of the study area. Fourteen major zooplankton groups wereobserved. Highest percentage (68.03 %) compositions of zooplankton were recorded inJune from station 1 and (47.05 %) in May from station 2.The highest mean percentage(20.25) and (46.50) were recorded in zoea. Analysis of variance between zooplanktonsand months showed no significant difference at (P〉0.05).
    Keywords: Biology ; zooplankton groups ; monsoon season ; Ketibander ; Indus Delta.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 13-24
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  • 4
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    Length-weight relationship and condition factor of green back mullet Liza subviridis fish (Valenciennes, 1836) collected from Damb Harbour, Balochistan coast, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26592 | 25017 | 2019-06-03 12:01:11 | 26592 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Total (378) Liza subviridis samples collected from Damb Fish LandingCentre Sonmiani (Miani Hor, Balochistan during the year of 2008 to 2010. The totallength was measured in between 6.75cm to 14.75cm and the body weight 0.75gm to 7.52gm. Highest condition factor (1.181) was measured in between size class 9 to 9.5 cmhowever lowest Kn (0.8738) were measured in between size class 10.5 to 11.0 cm. Thecalculated value of log a and regression coefficient b were -2.41680; 2.801 respectivelyduring the year of 2008-2009. However the value of log a and regression co-efficient bwere -2.4115; 2.8137 measured in the year of 2009-2010.Present study shows negativeallometric pattern of growth because the b-values less than ideal value 3.
    Keywords: Biology ; Fisheries ; Length-weight relationship ; Liza subviridis fish ; Balochistan coast ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 51-60
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  • 5
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    Population dynamic and length–weight relationships (LWRS) in Fenneropenaeus merguiensis (de Man, 1888) collected from Balochistan coast, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26607 | 25017 | 2019-06-04 07:07:38 | 26607 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Total of (632) Fenneropenaeus merguiensis specimens were collected from Damb Fish Landing Centre at Sonmiani, Balochistan during 15th August 2008 to 15th April 2010. The mortality rates M, F and Z computed are 2.46, 3.27 and 5.73 respectively and during the year 2009-2010, the mortality rates M = 2.36, F = 3.17 and Z = 5.63 were measured respectively. Exploitation Rate (E) were determine in between 0.57- 0.58 during 2008-2010. The calculated value of log a -3.0551 and regression coefficient, b 3.3931 were measured in 2008-2009 and the value of log a -3.2751 and regression coefficient b 3.5689 were recorded in 2009- 2010 respectively. The mean condition factor was recorded as 1.0179 and 1.0062 in 2008-2010.
    Keywords: Biology ; Population dynamics ; Fenneropenaeus merguiensis ; Balochistan coast ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 145-160
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  • 6
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    Seasonal variation of condition factor and weight - length relationship in Thryssa hamiltonii Gray, 1835 (Clupeiformes: Engraulidae) collected from Balochistan coast in the Arabian Sea, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26568 | 25017 | 2019-05-31 14:04:31 | 26568 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Present study deals with the effects of seasonal variation on condition factor (CF) and weight - length relationships (WLRs) of Thryssa hamiltonii, sampled during pre and post- monsoon seasons in 2011 from the Balochistan coast of the Arabian Sea. The results showed that T. hamiltonii has isometric growth characteristics in pre and post-monsoon. The value of b was calculated as 3.2364 in pre-monsoon, as 3.0499 in post-monsoon season and as 3.1346 in combined data with not significantly different from 3 (Pauly’ t test, P 〉 0.05) Moreover, the mean CF was calculated between 0.13 - 0.60 (mean: 0.26±0.010) in pre-monsoon season and between 0.19 - 0.90 (mean: 0.39±0.017) in post-monsoon season. The calculated CF showed statistically difference among the pre-monsoon, post-monsoon and combined data (One way ANOVA, P = 5.47E-08).
    Keywords: Biology ; Fisheries ; Length - weight relationships ; condition factors ; Hamilton's thryssa ; Thryssa hamiltonii ; Balochistan coast ; Arabian Sea.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 29-35
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  • 7
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    Determination of Fe, Zn, Mn, Cu, Cd and Pb concentrations in Scatophagus argus (Linnaeus, 1766) from the Korangi fish harbour, Karachi, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26582 | 25017 | 2019-06-02 07:36:11 | 26582 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Fe, Zn, Mn, Cu, Cd and Pb concentrations were measured by atomicabsorption spectroscopy in Scatophagus argus collected during January throughDecember 2013. Muscle and liver tissues of the fish samples were analyzed to examinethe differences in concentration among the above metals in different seasons of the year.Significant differences were found between the tissues, with all metals being consistentlyhigher in liver than those in edible tissues. There appeared to be a general trend ofincreasing concentration in post-monsoon for Fe, Zn, Cu and Cd and in pre-monsoon forMn and Pb. However, statistically significant differences were not found betweenseasons. The results may be concluded that the heavy metal amounts in spotted scat of theKorangi fish harbor do not show any threat to people health.
    Keywords: Biology ; Fisheries ; Heavy metals ; Scatophagus argus ; Korangi fish harbor ; Karachi ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 25-32
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  • 8
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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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  • 9
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    Status of thukrinet fishery from Damb Fish Harbour, Sonmiani Balochistan coast, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26618 | 25017 | 2019-06-05 06:07:00 | 26618 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Thukri net is basically a bottom set drift net, widely operated for shrimp catching along the coastal waters of Sindh and Balochistan provinces, creeks of Indus delta, Sonmiani bay and nearby shallow coastal areas. The field investigation was done for two fishing seasons) from 15th August, 2008 to 15th April 2009, and from 15th August 2009 to 15th April 2010. The catch rate of shrimp varied from 0.50kg/net/day to 7.50kg/net/day.Maximum catch 7.50kg/net/day was recorded in September 2008 and minimum 0.50kg/net/day in April 2009. The maximum catch of fishes (by-catches) was (3700kg/net/day) in September, 2008 and minimum was (12kg/net/day) in April, 2009. The average catch was 462.2kg/month and 4159.8kg/year in 2008-2009. The Thukri net catch of shrimp were about 779.40kg/boat/year and about 830kg/boat/year during 2008-2009 and 2009-2010 respectively and the finfishes were 4160kg/boat/year and 4779 kg/boat/year during the same period.
    Keywords: Fisheries ; Thukri net fishery ; Damb fish harbour ; Sonmiani ; Balochistan coast
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 21-38
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  • 10
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    Concentration of heavy metals in red, brown and green algae collected from the Karachi coast of Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26614 | 25017 | 2019-06-05 05:55:12 | 26614 | University of Karachi. Marine Reference Collection and Resource Centre
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    Publication Date: 2021-07-24
    Description: Seaweeds are highly productive resources in coastal ecosystems and sensitive to man-made forcing. This study deals with the use of heavy metal concentrations in seaweeds as bio-indicators for the metal pollution of coastal regions (Sunehri, Manora and Buleji) during Pre-monsoon (January to February) season in 2016. Concentrations recorded in Fe, Mn and Zn were much higher than, when compared with Cu, Ni, Cd, Pb and Cr values. The orders of metal concentrations in seaweeds were Fe 〉 Mn 〉 Zn 〉 Cu 〉 Ni 〉 Cr 〉 Pb 〉 Cd for Hypnea sp., Fe 〉 Mn 〉 Zn 〉 Cu 〉 Ni 〉 Pb 〉 Cd 〉 Cr for Padina tetrastromatica and Fe 〉 Mn 〉 Zn 〉 Cu 〉 Ni 〉 Pb 〉 Cd 〉 Cr for Caulerpa scalpelliformis. Furthermore, heavy metal concentrations were found in seaweeds as bio-indicator species for the first time from Sunehri coasts of Karachi, Pakistan. Thus, this study shows to validate the use of seaweeds as metal biomonitor of coastal waters of the Arabian Sea.
    Keywords: Biology ; Heavy metals ; seaweeds ; Hypnea sp. ; Padina tetrastromatica ; Caulerpa scalpelliformis ; Karachi coast ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 57-65
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