Length-weight relationships of wild and farmed Tor putitora from Pakistan

Naeem, Muhammad; Salam, Abdus; Ishtiaq, Abir

doi:10.1111/j.1439-0426.2010.01613.x

Cited by 14 publications

(7 citation statements)

References 4 publications

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“…The estimates of parameter b of LWR ranged from 2.99 to 3.21 in the present study. These values are quite different from the other closely related species of this genus, Tor putitora , b = 2.85 (allometric growth) from the River Korang, Islamabad, Pakistan (Naeem et al., 2011). This may be the result of slightly different size ranges of the studied samples, perhaps affected as well by differences in the sample size, sampling and preserving methods.…”

Section: Discussioncontrasting

confidence: 64%

Length-weight, length-length relationships and feeding habits of wild Indus Mahseer, Tor macrolepis, from Attock, Pakistan

Pervaiz¹,

Iqbal²,

Mirza³

et al. 2012

Journal of Applied Ichthyology

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In this study the length-weight (LWR) and length-length relationships (LLR) were carried out for Indus Mahseer, Tor macrolepis, from the Haro River and Nalah Kala, Attock, Pakistan. A total of 118 specimens were used to estimate the relationship parameters. The results of LWR (W = a TL b ) from five different sites indicated W = 0.0044 TL 3.14 , W = 0.0054 TL 3.08 , W = 0.0059 TL 3.21 , W = 0.0076 TL 3.12 , and W = 0.0107 TL 2.99 , respectively, with an overall value of W = 0.0100 TL 2.94 . All regressions for LLR were highly significant (P £ 0.001), with coefficient of determination (r 2 ) values of > 0.90. All relationships for LWR and LLR were found to be isometric. T. macrolepis is principally a herbivorous bottom feeder, mainly feeding on aquatic plants and algae, supplemented by insects.

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Section: Discussioncontrasting

confidence: 64%

Length-weight, length-length relationships and feeding habits of wild Indus Mahseer, Tor macrolepis, from Attock, Pakistan

Pervaiz¹,

Iqbal²,

Mirza³

et al. 2012

Journal of Applied Ichthyology

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“…The Kenyan IUCN red list threatened fishes biometric information has been quite insufficient despite a number of studies having been conducted within the Asian countries (Hossain et al, 2012;Gupta et al, 2011;Muchlisin et al, 2010;Naeem et al, 2010Naeem et al, , 2011Patiyal et al, 2010;Sani et al, 2010;Sarkar et al, 2009;Yousaf et al, 2009). In this study, the 10 species size structures demonstrated some marked length size class range differences (Table 1).…”

Section: Discussionmentioning

confidence: 79%

Population Structure, Condition and Length-Weight Relationships of Ten Vulnerable Epinephelus Genus Groupers off Kenyan South Coast Indian Ocean Marine Waters

Ogongo¹,

Mwachiro²,

Fulanda³

2014

Ecologia

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Groupers are apex predatory fishes playing important local economic roles and ecosystem functions worldwide. The Kenyan coast Indian Ocean waters have been a good landing centre for 30 Epinephelus genus species groupers. However, of late, their natural populations have greatly decreased with most being caught when still either juveniles or sub adults. Their individuals mean length and weights also showing drastic reductions. Thus, to avert this alarming population decline, length and weight reductions, information data is needed for use in the initiation of conservation measures for these prized premium fishes. This study therefore elucidates the population structure, conditions and length-weight relationships of 10 highly sought vulnerable Epinephelus genus grouper fishes off Kenyan inshore marine waters. The study results indicate declining population abundances, varying significant conditions (p<0.001) and negative allometric Length-Weight Relationship (LWR) growth regression coefficients (r 2 ) appearing stronger (r 2 >0.7048) for 9 of the species. Analysis of covariance (ANCOVA) between the regression line intercept (a) and slopes (b) among the species however revealed equal regression line slopes (p>0.05) demonstrating that all came from populations with equal slopes. The consistent non isometric patterns shown by the r 2 analyses in the plotted power curved data also suggests that unless stringent management measures are implemented to restrict further over-exploitation of these International Union for Conservation of Nature (IUCN) vulnerable listed fishes; it is likely that the species already categorized as 'Near Threatened' in the IUCN red list would soon become 'Endangered' while those 'Endangered' extinct. This can greatly result into the alteration of the ecosystems' ecological health as the fishes constitute important apex predators in the demersal food web and their stock depletions would be disastrous to the ecosystems.

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“…Mahseer are pelagic fish which swim actively due to their habitat in fast flowing foothills streams with highwater quality (Dinesh et al, 2010;Ambili et al, 2014;Raghavan et al, 2017). Actively swimming fish which live in fast flowing water usually have a value of b < 3 because more energy is allocated for swimming than for growth in terms of weight gain (Shukor et al, 2008;Muchlisin et al, 2010;. The same phenomenon was observed in the mahseer populations at both study sites.…”

Section: O N L I N E F I R S T a R T I C L Ementioning

confidence: 71%

The Path Forward: Conservation of Climate Change-Affected Breeding Habitat of Red-crowned Cranes near Zhalong Reserve, China

Gong¹,

Pang²,

Gao³

et al. 2021

PJZ

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Information on reproductive biology is crucial in formulating policy to manage and conserve mahseer in Atu Suasah and Lawe Melang Rivers, Aceh, Indonesia. This research aimed to analyse and compare of mahseer biology including sex ratio, length and weight relationship, Fulton and relative condition factor and fecundity to estimate the reproductive potential of mahseer in these two rivers. The study was conducted from July to December 2019. Mahseer samples were obtained from fishermen who captured the fish using gillnet with mesh size 1.5-2.0 inch. The specimens collected were placed in a coolbox and transported to the Aquatic Resources Management Department of IPB University in Bogor for further analysis. Regression, chi-square, Mann Whitney test and t-test were applied to analyze reproductive biology parameters. There was no significant between-site difference in the reproductive parameters of mahseer from Atu Suasah and Lawe Melang Rivers. The sex ratio was balanced. The growth pattern was allometric negative and the Fulton condition remained stable over the six month study period. Mahseer in the 610-710 mm length class made the largest contribution to total egg production. Management and conservation of this fish should include the designation of a reservation area to mantain larval production as the source of recruits.

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Length-weight relationships of wild and farmed Tor putitora from Pakistan

Cited by 14 publications

References 4 publications

Length-weight, length-length relationships and feeding habits of wild Indus Mahseer, Tor macrolepis, from Attock, Pakistan

Length-weight, length-length relationships and feeding habits of wild Indus Mahseer, Tor macrolepis, from Attock, Pakistan

Population Structure, Condition and Length-Weight Relationships of Ten Vulnerable Epinephelus Genus Groupers off Kenyan South Coast Indian Ocean Marine Waters

The Path Forward: Conservation of Climate Change-Affected Breeding Habitat of Red-crowned Cranes near Zhalong Reserve, China

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