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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 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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  • 3
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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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  • 4
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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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  • 5
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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
    Details
    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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  • 6
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    Heavy metal levels in Thunnus albacares (Bonnaterre, 1788) from Karachi Fish Harbour, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26566 | 25017 | 2019-05-31 13:57:48 | 26566 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Fish Thunnus albacares were marketed by local fishermen during Febuaryto November 2011 from Karachi Fish Harbour. The fishes were collected seasonallyspring (February, March), summer (April, May), Monsoon (August), winter (November)for analysis of heavy metals. The highest mean of length (cm) 80.70+0.21 and weight (g)4587.50+83.45 was measured in winter season. The highest mean concentration of Fe46.93+13.54 μg/g dry wt. and Mn 5.40+3.06μg/g dry wt. was determined in summer andspring season. The lowest mean of Fe 20.861+ 5.095 μ/g and Mn 4.80+1.41 μg/g dry wt.was recorded in spring and summer seasons also. The maximum level of Zn 29.95+11.41μg/g dry wt., Cu 7.08+2.64 μg/g dry wt. and Pb 0.54+0.13 μg/g dry wt., was measured inwinter season. The lowest mean of Cd 0.15+0.11μg/g dry wt. was determined in springseason. The concentration of metals in fish muscles as follows: Fe〉Zn〉Cu〉Mn〉Pb〉Cd.
    Keywords: Biology ; Fisheries ; Heavy Metals ; Thunnus albacares ; Karachi Fish Harbour ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 13-21
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  • 7
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    Effects of seasons on condition factor and weight - length relationship in Dussumier's halfbeak, Hyporhamphus dussumieri (Valenciennes, 1847), (Actinopterygii: Beloniformes: Hemiramphidae) from Karachi coast in the Arabian Sea (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26572 | 25017 | 2019-05-31 14:16:49 | 26572 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: A total of (n=114) H. dussumieri were collected during monsoon (August and September), post monsoon (October and November) seasons in 2011. Mean total length of females (t test: P = 2.5663E-12) and males (t test: P = 1.4766E-08) between two seasons were significantly different. Similarly, mean total length (t test: P = 9.8887E-20) and Size-frequency distribution (Kolmogorov-Smirnov two sample test: d = 0.82716, P = 3.41312E-15) were significantly different between monsoon and postmonsoon for combined sexes. The slope (b) of WLRs regression lines for monsoon except for male were significantly different from the isometric growth curve slope (b = 3). Therefore, the slope of WLRs regression lines for postmonsoon by combined sex and both female and male were significantly lower than the isometric growth curve slope (b = 3) suggesting negative allomnetric growth in post-monsoon season.
    Keywords: Biology ; Fisheries ; Hyporhamphus dussumieri ; Length weight relationships ; Karachi fish harbour ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 5-13
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  • 8
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    Seasonal changes in condition factor and weight-length relationship of tiger perch, Terapon jarbua (Forsskål, 1775) (Family-Terapontidae) collected from Korangi Fish Harbour, Karachi, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26589 | 25017 | 2019-06-03 11:52:00 | 26589 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: The present study was conducted to determine the effect of seasonalvariation on condition factors (CFs) and weight - length relationships (WLRs) of TigerPerch, Terapon jarbua (Forsskål, 1775) collected from landing centre at Korangi fishharbour during January to December 2014. A total of 224 specimens were collectedduring different seasons such as pre-monsoon, monsoon and post-monsoon seasons. Theresults showed that T. jarbua has negative allometric growth characteristics in premonsoon,positive allometric growth in monsoon, and isometric growth character in postmonsoonseason (Pauly’ t test, P 〉 0.05). The values of r are different from zero (P 〈0.05), indicated that T. jarbua has higher correlation in WLRs equations. Moreover, tocompare the results calculated from the present study with previous studies, log a valueswere plotted against values of b, which proved to be consistent with previous studies datafor T. jarbua. CFs for T. jarbua was estimated to be the highest value in pre-monsoon(mean: 2.6994±0.0649), followed by post-monsoon (mean: 0.7875±0.0139) and monsoon(mean: 0.4903±0.0105) season. One way ANOVA test showed that seasonal significantdifferences were found in condition factor of T. jarbua at P 〈 0.05.
    Keywords: Biology ; Seasonal changes ; Length - weight relationships (WLRs) ; condition factors (CF) ; T. jarbua ; Korangi Fish Harbour ; Karachi ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 19-28
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  • 9
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    An assessment of heavy metals in Trachinotus blochii (Lacepède, 1801) snubnose pompano fish from northern Arabian Sea (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26537 | 25017 | 2019-05-27 10:33:40 | 26537 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: A total 48 individual samples of Trachinotus blochii were collected fromKarachi fish harbor during January, 2009 to December, 2009. Six heavy metals includingZn, Cu, Cd, Ni, Pb, and Cr were determined in fish samples using Atomic AbsorptionSpectrophotometer. The metal contents ranges were Zn= 8.23-16.495 mg/kg, Cu=6.33-8.17 mg/kg, Cd= 0.705-0.84 mg/kg, Ni= 0.575-0.61 mg/kg, Pb= 0.39-0.8 mg/kg, Cr=0.1-0.49 mg/kg. The present study indicated that the concentration of two heavy metalsZn and Cr were significant however; they were in the permissible limits of FAO/WHO.
    Description: Higher Education Commission of Pakistan
    Keywords: Biology ; Fisheries ; Heavy Metals ; Trachinotus blochii ; fish harbor ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 25-29
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  • 10
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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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