Comparison of the change in morphological pattern during the growth in length of the grey mullets Liza ramada and Liza saliens from western Greece

Minos, George; Katselis, George; Kaspiris, P.; Ondrias, I.

doi:10.1016/0165-7836(94)00334-s

Cited by 23 publications

(28 citation statements)

References 9 publications

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“…Also, the results of morphological measurements on the L. saliens and L. ramada, obtained by Minos et al (1994Minos et al ( , 1995 supported these findings. The results of this study based on 34 morphometric character indices and 9 meristic counts are consistent with these findings as most of the morphometric character indices showed significant differences between M. cephalus and L. ramada, while most of the meristic counts showed insignificant differences between M. cephalus and L. ramada.…”

Section: Discussionsupporting

confidence: 78%

Phenotype and genotype differentiation between flathead grey mullet [Mugil cephalus] and thinlip grey mullet [Liza ramada (Pisces: Mugilidae)]

El-Zaeem¹

2011

Afr. J. Biotechnol.

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This study aimed to study the phenotype and genotype differentiation and to compare the amount of differences in phenotype based on morphometric character indices and meristic counts with the amount of differences in genotype based on random amplified polymorphic DNA (RAPD) fingerprinting between two Mugilidae, Flathead grey mullet (Mugil cephalus) and Thinlip grey mullet (Liza ramada). The results showed that there were significant differences in most of the morphometric character indices but no significant differences were detected in most of the meristic counts between M. cephalus and L. ramada. In addition, the euclidean distance between M. cephalus and L. ramada using hierarchical cluster analysis of quantitative phenotype based on morphometric character indices and meristic counts and condition factor was (0.421). Genotype analysis based on RAPD fingerprint showed highly genetic dissimilarity (0.437) between M. cephalus and L. ramada. These results confirmed that the amount of differences in genotype reflected the same amount of differences in phenotype between M. cephalus and L. ramada. Therefore, either phenotype analysis can be use based on a large number of morphometric character indices and meristic counts or genotype analysis based on RAPD fingerprinting to discriminate M. cephalus and L. ramada with the same results.

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Section: Discussionsupporting

confidence: 78%

Phenotype and genotype differentiation between flathead grey mullet [Mugil cephalus] and thinlip grey mullet [Liza ramada (Pisces: Mugilidae)]

El-Zaeem¹

2011

Afr. J. Biotechnol.

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“…All the above authors when studying the relationship of carapace length (CL) vs total length (TL) considered the growth of TL directly proportional (isometric growth) to the growth of CL using the linear model TL = a + (b CL ) in which b is considered at a constant rate of increase. However, Minos et al (1995) and Tidu et al (2004) applied the exponential equation Y= ax b when b=1 to explain the relationship of CL vs TL as they believed that in nature the constant rate of increase of any morphometric character is a specific feature of the differential increase in these two body dimensions. There are no management regulations governing the harvest of spiny lobsters in India, except for the minimum legal size restrictions for export (Radhakrishnan and Manisseri, 2003).…”

Section: Introductionmentioning

confidence: 99%

Ontogenetic changes in morphometry of the spiny lobster, Panulirus homarus homarus (Linnaeus, 1758) from southern Indian coast

Radhakrishnan¹,

Thangaraja²,

Vijayakumaran³

2015

J.Mar.Biol.Ass.India

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The morphometric relationships, carapace length vs total length (CL vs TL), carapace length vs weight (CL vs W), total length vs weight (TL vs W), carapace length vs carapace width (CL vs CW), carapace length vs length of third walking leg (CL vs III WL) and carapace length vs width of second abdomen (CL vs II ASW) were estimated for the Scalloped spiny lobster Panulirus homarus homarus fished from east and west coast of Tamilnadu. A total of 462 males and 350 females were measured for the study. Carapace length of lobsters ranged from 20.4 mm to 101.0 mm CL. The power function y=ax b was applied in all the relationships. The first derivative dY/dCL-abCL b-1 where Y is TL was used to study the growth tendency of TL in relation to CL. A negative allometry, b<1 was found for males which was also reflected in their decreasing growth rate of TL in relation to CL. The CL vs W relationship showed a general negative allometry, b<3 in both sexes. Size at the onset of sexual maturity in male was determined based on allometric growth of third pereopod. Slopes of regression of log transformed data showed positive allometric growth of third pereopod for males (b=1.17) compared to negative allometry in females (b=0.97). Females had (b=1.04) positive allometry in second abdomen width compared to negative allometry in males (b=0.934). However, their size at maturity could not be precisely predicted as the b value of the two regression lines of immature (1.09) and mature females (1.01) did not indicate any significant deviation from 1. The size at maturity of males (63.0 mm) was determined where the two regression lines of mature and immature specimens crossed. The results obtained in the present study support the predictions of resource allocation theory in crustaceans and demonstrate marked shifts in resource allocation through ontogeny in both sexes.

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“…14 morphometric features were measured for biometric study by following the method of McKay (1985). , where 'a' and 'b' are constants and Y is the morphometric variable (Minos et al, 1995). Data were log (10) transformed and least-square regression analysis was applied to calculate the parameters of the allometric equation of each variable versus SL.…”

Section: Methodsmentioning

confidence: 99%

“…The morphometric variables were then divided into three categories: positive allometry (+A), when the slope (b) was significantly higher than 1 and the variable increased relatively to SL; negative allometry (-A), when the slope was significantly lower than 1 and the variable decreased relative to SL; and isometry (I) when the slope showed a non significant difference from 1, indicating direct proportionality between the variable and SL. The analysis for the normal distribution features was carried out based on Pearson linear correlation coefficient (Minos et al, 1995).…”

Section: Methodsmentioning

confidence: 99%

Biometry analysis, length-weight relationship and sexual dimorphism of the Spotted Scat, Scatophagus argus(Linnaeus, 1766)(Perciformes: Scatophagidae) from Gulf of Mannar, southeast coast of India

Gandhi¹,

Venkatesan²,

Zacharia³

2013

J. Mar. Biol. Ass. India

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A total of 1,659 specimens of spotted scat were collected from commercial landings in Mandapam along Gulf of Mannar for studying biometry, length-weight relationship and sexual dimorphism. Biometry was carried out to analyse the growth rate of body parts in relation to the standard length. Fourteen morphometric characteristics were examined. The study revealed that the fastest growth rate was in depth of the body followed by pre-dorsal and pre-anal length and lowest in the eye diameter. The length-weight relationship was also carried out for 1,141 females ranging in TL from 140 -340 mm and 518 males in the range of 50 -117 mm. The equation of W = 0.005373 L 2.842 and W = 0.002152 L 2.479 were derived for male and female respectively. The relationship revealed that the value of exponent ''b'' was considerably below 3, which might be due to the deep, strongly compressed body. Analysis of covariance revealed that there were significant differences (P< 0.01) between sexes. Male and female spotted scat could be differentiated by head shape and colour of body. Females were larger and heavier than males of the same length group.

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Comparison of the change in morphological pattern during the growth in length of the grey mullets Liza ramada and Liza saliens from western Greece

Cited by 23 publications

References 9 publications

Phenotype and genotype differentiation between flathead grey mullet [Mugil cephalus] and thinlip grey mullet [Liza ramada (Pisces: Mugilidae)]

Phenotype and genotype differentiation between flathead grey mullet [Mugil cephalus] and thinlip grey mullet [Liza ramada (Pisces: Mugilidae)]

Ontogenetic changes in morphometry of the spiny lobster, Panulirus homarus homarus (Linnaeus, 1758) from southern Indian coast

Biometry analysis, length-weight relationship and sexual dimorphism of the Spotted Scat, Scatophagus argus(Linnaeus, 1766)(Perciformes: Scatophagidae) from Gulf of Mannar, southeast coast of India

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