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

Abstract

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.

Some Morphometric Relationship Traits of Talang Queenfish, Scomberoides commersonnianus (Lacépède, 1801) from Pakistan

“…Thus, all the relations with length were significantly correlated among these parameters. In this study, the highly significant correlation for body length with other parameters coincides with studies conducted on O. mossambicus fish (Naeem et al, 2011a), T. putitora (Naeem et al, 2011b) and on T. macrolepis (Pervaiz et al, 2012).…”

Geração De Biodiversidade De Fauna Silvestre Em Canaviais Orgânicos

“…En el caso de los tres coeficientes de crecimiento de la relación longitud total-peso total (LT-WT) estimados en este trabajo, también se encontraron dentro del rango 2.540-3.378 reportado para el género Geophagus en América del Sur tal y como aparece en la Tabla 3; sin embargo el correspondiente a los machos, el cual fue alométrico positivo -por excesoestá por fuera del promedio ± intervalo de confianza al 95%, cuyo valor es de 3.014 ± 0.08. Los parámetros biológicos de la relación longitud-peso (RLP) permiten estimar el peso de los peces en función de la longitud y viceversa , realizando comparaciones entre poblaciones de la misma especie o entre especies diferentes (JOYEUX et al, 2009) y son importantes para convertir y comparar los datos de pesca con las características biológicas de una especi determinada, como el patrón de crecimiento, por ejemplo (GIARRIZZO et al, 2011;PERVAIZ et al, 2012).…”

Length-weight relationship models of two tropical shads,Tenualosa macrura(Bleeker, 1852) andTenualosa toli(Valenciennes, 1847) in the coastal waters of Sarawak, Malaysia

“…Logarithmic transformation of the formula ( W = aL b ) into Log W = Log a + b Log TL was done, while each value of a and b was determined empirically. Moreover, linear regression was used to calculate the relationship between SL and TL and coefficient of determination ( R 2 ) was used to determine the fit of the model (Pervaiz et al., ).…”