Morphometry of the stone loach, Barbatula barbatula: do mensural characters reflect the species’ life history thresholds?

Kováč, Vladimír; Copp, Gordon H.; Francis, Malcolm P.

doi:10.1007/978-94-017-3678-7_8

Cited by 49 publications

(93 citation statements)

References 19 publications

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“…This analysis is supported by one of the hypotheses proposed by KOVÁC et al (1999), who demonstrated that changes in morphometric characters can be used to determine the size at which fish undergo transitions. In that sense, it can be demonstrated that C. undecimalis does not show an isometric growth pattern, and shows significant difference between the growth rates of larvae and juveniles.…”

Section: Discussionsupporting

confidence: 52%

Buccal apparatus and gastrointestinal tract dimensions associated to the diet of early life stages of Centropomus undecimalis (Centropomidae, Actinopterygii)

Araújo

Silva-Falcão

Severi

2011

Iheringia, Sér. Zool.

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ABSTRACT. The present study aims to compare the buccal apparatus and gastrointestinal tract of early life stages of Centropomus undecimalis (Bloch, 1792), and relate them to its diet. A total of 190 individuals collected with a channel net in the Catuama estuary (07°40'9.9''S, 34°50'36.7''W), northern coast of the state of Pernambuco, were examined. Morphometrical and meristic data were analyzed for the two initial developmental periods (larval and juvenile). Their digestive tube was morphologically characterized and its content identified. The longest transverse axis of food items was measured, and compared to the standard length (SL) and mouth gape size (D) of the individuals. Body measurement regressions differed significantly (p<0.001) between larvae and juveniles. The stomachs with food content (n=118 individuals) presented a proportion of 62% full and 30% empty (being 8% damaged). They differed in relation to the fullness level and presented a coiled shape when empty. The number of food items in relation to SL and D did not present an evident correlation. Larvae (SL<10 mm) feed on small copepods, while juveniles (SL=11.1 to 64.7 mm) ingest larvae of various decapod species, showing a distinct diet between these initial developmental stages.

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Section: Discussionsupporting

confidence: 52%

Buccal apparatus and gastrointestinal tract dimensions associated to the diet of early life stages of Centropomus undecimalis (Centropomidae, Actinopterygii)

Araújo

Silva-Falcão

Severi

2011

Iheringia, Sér. Zool.

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“…Para examinar possíveis variações ontogênicas ao longo do desenvolvimento da espécie, as variáveis morfométricas (variáveis resposta) foram plotadas contra os comprimentos padrão e da cabeça (variáveis explanatórias) e suas relações descritas por diferentes modelos de regressão (Kováč et al, 1999). Inicialmente, a hipótese de que o desenvolvimento das relações corporais é isométrico contínuo foi testada a partir de uma regressão linear simples.…”

Section: Methodsunclassified

Desenvolvimento larval de Brycon hilarii (Characiformes, Characidae)

Oliveira

Bialetzki

Gomes

et al. 2012

Iheringia, Sér. Zool.

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ABSTRACT. Larval development of Brycon hilarii (Characiformes, Characidae). The present study characterizes the early stages of development of Brycon hilarii (Valenciennes, 1850) based on morphometric and meristic characters. Patterns of development in morphometric characters were analyzed through the fit of linear, quadratic and linear piecewise models. Samples were collected from March 2000 to March 2004 in basins of the Cuiabá and Manso rivers, state of Mato Grosso, Brazil. Larvae were identified and classified in different stages (Larval Yolk, Pre-Flexion, Flexion, and Post-Flexion) according to notochord development. The morphometric and meristic characters for each larva were, respectively, measured and counted. The standard length ranged from 3.25 to 26.00 mm. The Larval Yolk stage showed a greater concentration of dendritic pigments along the intestine, and the Flexion and Post-Flexion stages showed an intensified pigmentation intensified along the back. A single spot on the humerus and another on the caudal peduncle were observed at the end of the Post-Flexion stage. Also, in the Larval Yolk and Pre-Flexion stages. The intestine is long, the snout is short, the adhesive organ was present in the Larval Yolk and Pre-Flexion, and the mouth is terminal throughout the development. The total number of myomeres ranged from 41 to 50 (23 to 30 pre-anal and 16 to 24 post-anal). Number of fin rays: dorsal 11; anal 30; pectoral 15 and ventral eight. The analysis of the development indicated higher metamorphosis in the Flexion stage.KEYWORDS. Morphology, larvae, fish, piraputanga, Paraguai river basin. RESUMO. O presente estudo caracterizou o desenvolvimento inicial deBrycon hilarii (Valenciennes, 1850) através de caracteres morfométricos e merísticos e analisou as relações entre as características morfométricas das larvas ao longo do desenvolvimento usando modelos de regressão linear, quadrática e linear por partes. O material foi obtido nas bacias dos rios Cuiabá e Manso, Mato Grosso, Brasil, entre março de 2000 e março de 2004. Os indivíduos foram identificados e separados de acordo com o grau de desenvolvimento da notocorda e, posteriormente, medidos e contados os caracteres morfométricos e merísticos, respectivamente. O comprimento padrão variou entre 3,25 e 26,00 mm. Inicialmente, as larvas apresentaram maior concentração de pigmentos dendríticos ao longo do intestino e, em flexão e pós-flexão, intensificaram-se no dorso do corpo. Uma mancha umeral e outra no pedúnculo caudal foram observadas no final do estágio de pós-flexão. O intestino apresentou-se longo, o focinho curto, o órgão adesivo presente em larval vitelino e pré-flexão e a boca terminal por todo o desenvolvimento. O número total de miômeros variou de 41 a 50 (23 a 30 pré e 16 a 24 pós-anal). O número de raios das nadadeiras foi: dorsal 11; anal 30; peitoral 15 e ventral oito. A análise do crescimento indicou maior metamorfose no estágio de flexão. PALAVRAS-CHAVE.Morfologia, larva, peixe, piraputanga, bacia do rio Paraguai.

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“…To examine patterns of relative growth, raw data from 27 morphometric characters were plotted against SL as described by Kováč et al (1999). TRA was used to test whether body proportions change abruptly rather than gradually (Kováč et al, 1999). This analysis identifies three possible patterns of growth: isometric, allometric and isometric with abrupt change.…”

Section: Caudal (C) Peduncle Length (Dorsal) (17-14); Caudal Pedunclementioning

confidence: 99%

“…This analysis identifies three possible patterns of growth: isometric, allometric and isometric with abrupt change. The F-test (Sokal and Rohlf, 1981) was used to test which model provides the best fit (Kováč et al, 1999).…”

Section: Caudal (C) Peduncle Length (Dorsal) (17-14); Caudal Pedunclementioning

confidence: 99%

“…For example, the type, size and arrangement of a fish's fins are inextricably related to its ecological niche (Hogan, 2007). Many authors suggest that morphological differences between populations and/or within populations can be the result of evolution, phenotypic plasticity or both (Kováč et al, 1999;Robinson and Wilson, 1996;Záhorská et al, 2009). Phenotypic plasticity can be defined as 'the ability of individual genotypes to produce different phenotypes when exposed to different environmental conditions' (Pigliucci et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

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Morphology, sexual dimorphism and size at maturation in topmouth gudgeon (Pseudorasbora parva) from the heated Lake Licheńskie (Poland)

Záhorská

Balážová

Šúrová

2013

Knowl. Managt. Aquatic Ecosyst.

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Key-words: interpopulation variability, extreme habitat, invasive species, climate changeTo assess the spatial variability in external morphology as well as sexual dimorphism of a non-native population of topmouth gudgeon Pseudorasbora parva within an ontogenetic context, triple regression analysis (distance-based measurements) and statistical tests were applied to data from a heated lake in Poland. Moreover, this population just invaded this extreme and thus special habitat in 2003, and therefore it represents a novel environment and its first stages of establishment. It has often been reported that topmouth gudgeon is very flexible when reaching new environments and this also shows in forming different phenotypes. We found that mature males and females have not only a different morphology, but also the development of the traits is different. These findings correspond with the specifics of this particular type of habitat. RÉSUMÉMorphologie, dimorphisme sexuel et taille à maturité du Pseudorasbora (Pseudorasbora parva) d'un lac réchauffé, Licheńskie (Pologne) Mots-clés :variabilité entre populations, habitat extrême, espèces envahissantes, changement climatique Pour évaluer la variabilité spatiale de la morphologie externe ainsi que le dimorphisme sexuel de la population non autochtone de Pseudorasbora Pseudorasbora parva dans un contexte ontogénétique, l'analyse de régression triple (mesures fondées sur la distance) et les tests statistiques ont été appliqués aux données d'un lac réchauffé en Pologne. Cette population a envahi en 2003 cet extrême et donc spécial habitat qui représente un nouvel environnement aux premiers stades de l'établissement de la population. Il est souvent signalé, que Pseudorasbora est très flexible en colonisant de nouveaux environnements et cela se traduit par la formation de phénotypes différents. Nous avons constaté que les mâles adultes et les femelles ont non seulement une morphologie différente, mais aussi un dé-veloppement des traits différent. Ces résultats correspondent aux spécificités de ce type particulier d'habitat.

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Morphometry of the stone loach, Barbatula barbatula: do mensural characters reflect the species’ life history thresholds?

Cited by 49 publications

References 19 publications

Buccal apparatus and gastrointestinal tract dimensions associated to the diet of early life stages of Centropomus undecimalis (Centropomidae, Actinopterygii)

Buccal apparatus and gastrointestinal tract dimensions associated to the diet of early life stages of Centropomus undecimalis (Centropomidae, Actinopterygii)

Desenvolvimento larval de Brycon hilarii (Characiformes, Characidae)

Morphology, sexual dimorphism and size at maturation in topmouth gudgeon (Pseudorasbora parva) from the heated Lake Licheńskie (Poland)

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