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  • 1
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    Seasonal variation in length–weight relationship and relative condition factor of Sardinella melanura of Balochistan coast (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26557 | 25017 | 2019-05-31 13:04:23 | 26557 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: For length-weight relationship (LWR) and condition factor (K) analysis,the fish Sardinella melanura (Sardine) were caught through gill net from the coast ofGwadar Balochistan during the months of August, 2003 to August, 2006. The studyreveals that the coefficient of determination r2 was ≥ 0.911. The regression slop b valuesfalls within the range of 2.5 - 3.5 and mean value of b was 2.79. The length of 20.6±1.41cm was recorded in post south west monsoon which was the highest and the lowest of13.2±0.63 cm was in pre south west monsoon. The weight of 72.7±26.40gms wasrecorded in post south west monsoon which was highest and the lowest of 20.4±4.5 wasrecorded in pre south west monsoon. The condition factor (K) of 0.90±0.21 was recordedin south west monsoon which was highest and the lowest of 0.80±0.11 was recorded innorth east monsoon. The relationships between condition factor and log weight, andcondition factor and total length were highly significant.
    Keywords: Biology ; Fisheries ; Length-weight relationship ; condition factor ; Sardinella melanura ; Balochistan coast.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 17-26
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  • 2
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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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  • 3
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    Fecundity of three species of Penaeid shrimps, Penaeus monodon (Fabricius, 1798), Penaeus indicus (H. Milne-Edwards, 1837) and Penaeus japonicus (Bate, 1888) of Karachi coast, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26536 | 25017 | 2019-05-27 10:29:57 | 26536 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: In order to define the period of maturity of penaeid shrimps at least three indices (fecundity, size structure and density of mature females) are required. During thepresent study the relationships between fecundity and total length, carapace length, ovary length, body weight and ovary weight of three species of Penaeid shrimps, Penaeus (Fenneropenaeus) indicus, Penaeus (Marsupenaeus) japonicus and Penaeus (Penaeus) monodon were found out. Samples of shrimps were collected from fish market, identified to the species level, morphometric measurements of each individual were recorded andthe fecundity of each developed shrimp was estimated.The relationship between body weight and fecundity and between body length and fecundity were linear in all three species. The result indicated positive strong correlation between total length (size) and fecundity in all three species. Positive strong correlationswere observed between carapace length and the fecundity, ovary length and fecundity,body weight and fecundity and ovary weight and fecundity in P. indicus and P. monodonwhile Penaeus japonicus showed moderate positive correlations between all mentioned morphometric parameters and fecundity.There was a strong correlation between fecundity and body length in Penaeus japonicus (r =0.880), fecundity and ovary weight in Penaeus indicus (r = 0.943) andfecundity and carapace length in Penaeus monodon (r = 0.970). The estimated fecundity of Penaeus indicus varied between 989073.36 to 1380581.565 eggs for body length range 14.4 to 20.1 cm while that of Penaeus japonicus varied between 249602.2609 to 320026.71 eggs for length range 15.4 to 19.4 cm and fecundity of Penaeus monodon,with body length range 14.4 to 21.1 cm, varied between 221271.6 to 400296.288 eggs.
    Keywords: Biology ; Fisheries ; Fecundity ; Penaeus monodon ; Penaeus japonicus and Penaeus indicus.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 11-23
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  • 4
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    Evaluation of trace metal (Hg, B, Co, and Al) levels in tissues of skipjack tuna, Katsuwonus pelamis (Linnaeus, 1758) fish from Karachi Fish Harbour, Karachi, Pakistan (2021)
    In:  pjms_ku@yahoo.com | http://aquaticcommons.org/id/eprint/26559 | 25017 | 2019-05-31 13:10:11 | 26559 | University of Karachi. Marine Reference Collection and Resource Centre
    Details
    Publication Date: 2021-07-24
    Description: The level of four heavy metals Mercury (Hg), Boron (B), Cobalt (Co),Aluminum(Al) in muscle and liver of Katsuwonus pelamis fish. Fish sample ofKatsuwonus pelamis were collected from fish harbour of Karachi during January 2007and December 2007 for metal analysis. Samples were analyzed by AAS-700. The highestlength (63cm) and weight (2700g) were recorded in this studied. The meanconcentrations of Hg, B, Co and Al in muscle were recorded as 0.041, 0.069, 0.041and0.030μg/g, respectively. However, the mean concentrations of Hg, B, Co and Al in livertissues were found as 0.673, 0.725, 0.725 and 0.498μg/g, respectively.The highestconcentration of B was found in both liver and muscle tissues in pre-monsoon andmonsoon, and the lowest concentration of Al was found in liver tissues at pre-monsoon,monsoon and post-monsoon seasons. The results of this study show that Hg, Co and Alaccumulations of K. pelamis caught from Karachi coast were generally below theinternational permissible levels. Therefore, metal accumulations in K. pelamis and allother fishes have to be monitored continuously in this region for human healthy. ANOVAanalysis clearly revealed that there was a significant p≤0.05 in organ of fishes.Statistically significant differences were observed in the mean metal values fromdifferent seasons and tissues (p〈0.05).
    Keywords: Biology ; Fisheries ; Heavy metals ; Katsuwonus pelamis fish ; fish harbour ; Karachi ; Pakistan.
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 37-42
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  • 5
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    Heavy metal levels in elongate sole (Solea ‎elongata Day, 1877) from the Korangi ‎Fish ‎Harbour, Karachi, Pakistan.‎ (2021)
    Details
    Publication Date: 2021-05-19
    Description: In this study, fish samples collected from Elongate Sole (Solea elongata Day, 1877) ‎caught on the Korangi Fish Harbour in 2018 (South-west Monsoon and North-east ‎Monsoon) were analysed to determine concentrations of heavy metals: Fe, Zn, Cu, Pb, ‎Mn and Cd by an atomic absorption spectrophotometer, expressed per unit of dry weight ‎of each sample. The average measured level of Fe, Zn, Cu, Pb, Mn and Cd for Solea ‎elongata was 38.716±11.321 μg g−1, 16.638±3.344 μg g−1, 1.067±0.404 μg g−1, ‎‎0.022±0.043 μg g−1, 0.273±0.100 μg g−1 and 0.022±0.010 μg g−1, respectively. Although ‎the contamination values obtained from Solea elongata are below the limits, it is ‎important to follow the metal accumulation values.‎
    Description: Published
    Description: Refereed
    Keywords: Solea elongata ; accumulation ; elongate sole ; ASFA_2015::H::Heavy metals ; ASFA_2015::C::Chemistry
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 39-45
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  • 6
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    Length-weight relationship and condition factor in Sarda orientalis (Temminck & Schlegel 1844) (Family-Scombridae) fish from Karachi fish harbour. (2023)
    Details
    Publication Date: 2023-02-16
    Description: Sarda orientalis (Family-Scombridae) of assorted length (cm) and weight (gm) were obtained from Karachi fish harbor during January to December (2019) for measurement of length-weight relationship (LWR’s) and Fulton‘s condition factor (K). The range of length (57-60.8) and weight (2123-2641) were estimated. Total mean length (cm) (gm) (59.14±0.94) and weight (gm) (2336.32±114.21) were measured. LWR was estimated as W = 0.08166134 × L 2.5149 (log W = -1.088 + 2.5149log L). The highest mean of condition factor (K) (1.15±0.02) were measured in post-monsoon season. Assorted (ANOVA) analysis indicates that there is a significant correlation between weight, length, and season (p0.05).
    Description: Published
    Description: Refereed
    Keywords: Sarda orientalis ; length-weight relationship ; Karachi fish harbour ; ASFA_2015::M::Marine biology ; ASFA_2015::L::Length-weight relationships ; ASFA_2015::C::Condition factor
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 85-92
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