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  • 11
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    Symbiotic association between Echinometra mathaei (Echinoidea: Echinometridae) and Athanas sp. (Caridea: Alpheidae) from Sunhera Beach, Karachi (Northern Arabian Sea) (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26623 | 25017 | 2019-06-05 06:26:36 | 26623 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: During a recent fieldwork conducted along the exposed rocky shores of Karachi revealed association between alpheid shrimp Athanas sp. and sea urchin Echinometra mathaei (de Blanville, 1825). Globally symbiotic relationships between shrimps and other invertebrates is a known phenomenon, whereas the association between caridean shrimp and sea urchin has been commonly reported since long. The current study describes taxonomic details of both the organisms. This is the first report on symbiotic association between alpheid shrimp and sea urchin from Pakistan.
    Keywords: Biology ; Symbiotic ; Athanas sp. ; Echinometra mathaei
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 73-77
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  • 12
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    Diversity and seasonal variations of insects in Sandspit (backwater) mangrove forest (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26541 | 25017 | 2019-05-27 10:42:55 | 26541 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: The study deals with population diversity and seasonal variation of insectsin Sandspit mangrove forest dominated by grey mangrove Avicennia marina. In order toexamine the diversity and seasonal variations monthly data were collected fromNovember, 2007 to October, 2008. A total of 26 species of insects were recorded, mostof the species belonging to order Diptera. The highest diversity (H') 1.936 and richness(d1) 2.309 of insects were found in October while maximum value of evenness 1 wascalculated in September. The highest value of dominance (D) 0.851 was recorded inMarch. The result indicates that physical structure of mangrove vegetation facilitates thehabitation of insect fauna, canopy shade having an important function in providing coolerand wetter surface substrate at Sandspit area.
    Keywords: Biology ; Ecology ; Diversity ; seasonal variation ; insects ; Sandspit mangrove forest.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 61-66
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  • 13
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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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  • 14
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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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  • 15
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    Composition of major zooplanktonic groups in Shahbunder creek system - Indus deltaic area (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26577 | 25017 | 2019-05-31 14:25:45 | 26577 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: A study was conducted in Shahbunder creek system, Indus deltaic area to observe the composition of major zooplanktonic groups during October – December, 1997 (post monsoon period). Total fourteen (14) major groups of zooplankton were recorded from two stations. Three groups copepod, chaetognatha and zoea constituted the major component of zooplankton at both the stations. Copepod was the most dominant group, constituting 50.50% at station # 1 and 46.12 at station # 2. Highest mean (15182.0±1402.14), (9343.66±4246.11) were measured in copepods at station# 1 and station# 2 respectively. This is the first attempt on ecological and zooplanktonic studies in Shahbander creek system. Hence, this study will enhance our knowledge on the creek ecosystem of Indus delta.
    Keywords: Biology ; Shahbander creek system ; Indus delta ; zooplankton ; composition.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 43-59
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  • 16
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    Preliminary studies on zooplankton biomass in Korangi – Phitti creek systems, Karachi (Northern Arabian Sea) (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26609 | 25017 | 2019-06-04 07:12:18 | 26609 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: A research study was conducted on hydro-biological features including zooplankton, salinity temperature, dissolved oxygen, pH and turbidity in the Korangi-Phitti creek system at two stations during January to December 1998. Three commonly used techniques wet weight, dry weight and settled volume were adopted for the estimation of zooplankton biomass. From (Korangi creek) the highest wet weight (65.80 gms/100m3), dry weight (3.20 gms/100m3) and settled volume (82.30 ml/100m3) were recorded in southwest monsoon season. From (Phitti creek) highest wet weight (49.50 gms/100m3), dry weight (1.90 gms/100m3) and settled volume (58.50 ml/100m3) were also estimated in southwest monsoon season. Statistical analysis (P〉0.05) shows statistically significant difference between wet weights, dry weight and settled volume with seasons and stations.
    Keywords: Biology ; Zooplankton biomass ; Korangi - Phitti creek system ; Indus delta.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 173-186
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  • 17
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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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  • 18
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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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  • 19
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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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  • 20
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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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