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  • 1
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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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  • 2
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    Abundance and diversity of major zooplankton groups during premonsoon season in the Port Qasim creek system - Karachi (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26591 | 25017 | 2019-06-03 11:56:07 | 26591 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: A preliminary study was conducted on the occurrence and faunasticcomposition of zooplankton in two creeks of Port Qasim creek system during January toApril 1998 (pre-monsoon season). Total 14 major groups were recorded during the studyperiod. Despite the importance of zooplankton in aquatic food web meager information isavailable on the assemblage of zooplankton in the port Qasim creek system. Highestmean (%) compositions (38.96) were recorded in copepod at station # 1 and chaetognath(23.95) at station # 2. Copepods, chaetognath and zoea were the major component ofzooplanktonic groups at both the stations. The hydrographic parameters such as airtemperature (oC), water temperature (oC), salinity (ppt), dissolved oxygen (mg/L), pH,and transparency (cm) were recorded on monthly basis. No significance correlation at(P 〈 0.05) was observed in between zooplankton with hydrographic parameters, localityand months. The number of zooplankton/100m3 found in order at station #1: copepod 〉chaetognath 〉 zoea 〉 penaeid PL 〉 amphipoda 〉 hydromedusae 〉 caridean PL 〉 fishlarvae 〉 lucifer 〉 megalopa 〉 fish eggs 〉 mysids 〉 acetes 〉 squilla larvae. At station # 2:chaetognath 〉 copepod 〉 zoea 〉 mysids 〉 Lucifer 〉 hydromedusae 〉 megalopa 〉penaeid PL 〉 fish larvae 〉 fish eggs 〉 amphipoda 〉 caridean PL 〉 others 〉 acetes 〉squilla larvae.
    Keywords: Biology ; Port Qasim creek system ; diversity ; major zooplankton groups ; pre-monsoon.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 37-50
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  • 3
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    Studies on the seasonal abundance and diversity of Echinoderms (Asteroidea, Oophiuroidea, Echinoidea, and Holothuroidea) from coastal areas of Karachi (Northern Arabian Sea) (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26604 | 25017 | 2019-06-04 06:56:50 | 26604 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: Species diversity and abundance of four major groups of Echinoderms (Asteroidea, Ophiuroidea, Echinoidea and Holothuroidea) were recorded from two rocky shores Buleji and Sunehri during January to December 2014. Twenty surveys were done during low tides from intertidal zone. Twenty one (21) species of Echinoderms were identified including Asterina lorioli, Asteropectin indicus, Anthenea rudis, Asterina sp. Ophioplocus imbricatus, Ophionereis dubia, Macrophiothrix aspidota, Ophiothrix sp. Ophiothella sp., Echinometra mithai, Echinometra sp., Holothuria atra, Holothuria arenicola, Holothuria leucospilota, Holothuria pardalis, Holothuria verrucosa, Holothuria cinerascens, Aslia forbesi, Staurothyone rosacea, Stolus buccalis and Ohshimella ehrenbergii. A total of 1,062 specimens were collected from Buleji and 778 from Sunehri. Holothuria arenicola and Holothuria pardalis shows highest relative abundance in all seasons. The highest abundance (28.14%) and (34.45%) of Holothuria arenicola was recorded during pre-monsoon season and the lowest relative abundance (0.29%) was observed in Holothuria leucospilota and Aslia forbesi from Buleji in Southwest monsoon and Holothuria cinerascens (0.42%) from Sunehri in post-monsoon season.Highest Shannon –Wiener diversity index (H') at Buleji was recorded in Northeast monsoon season (2.24) and in post-monsoon season (1.97) at Sunehri. No significant difference was observed in between seasons and species at (P〉0.05, 0.49) and species between localities at (P〉0.05, 0.11).
    Keywords: Biology ; Abundance ; diversity ; Asteroidea ; Ophiuroidea ; Echinoidea ; Holothuroidea and Karachi coast.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 101-117
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  • 4
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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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