Ecomorphology and Biogeography of a Tropical Stream Fish Assemblage: Evolution of Assemblage Structure

Wikramanayake, Eric

doi:10.2307/1937583

Cited by 127 publications

(122 citation statements)

References 26 publications

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“…particular interactions between the morphology of organisms and their ecology) in fish assemblages, many studies have significantly related diet to several morphological characteristics of species (Gazt 1979;Kotrschal 1989;Wikramanayake 1990; a Corresponding author:…”

Section: Introductionmentioning

confidence: 99%

Dietary-morphological relationships in fish assemblages of small forested streams in the Bolivian Amazon

Ibáñez

Tedesco

Bigorne

et al. 2007

Aquat. Living Resour.

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-We explored the relationships between diet and morphology in 30 fish species from forested tropical streams of the Bolivian Amazon. These species were first assigned to eight broad trophic guilds based on stomach contents analysis. The relationships between diet and morphology were then examined using Redundancy Analysis, after having checked for potential phylogenetical effects. Results show that, independently of any phylogenetic constraints, some of the trophic guilds could be grossly predicted from few relevant morphological attributes (i.e. relative intestinal length, standard length and mouth orientation) and thus suggest a significant link between diet and morphology. In other words, species having similar diet tend to converge to some extent on some morphological attributes. This link was nevertheless rather weak, suggesting that even if morphology may set limits to patterns of resource use, these limits are broad enough to allow fishes changing their choice of prey resources to respond to local biotic and/or abiotic conditions. Key words: Diet / Morphology / Phylogeny / Convergence / Tropical streams / Fishes / Bolivia Résumé -Relations entre le régime alimentaire et les caractéristiques morphologiques des peuplements de poissons de petits cours d'eau forestiers de l'Amazonie bolivienne. Nous avons analysé les relations entre le régime alimentaire et la morphologie de 30 espèces de poissons présentes dans de petits cours d'eau forestiers de l'Amazonie bolivienne. Après une analyse de leurs contenus stomacaux, les 30 espèces ont été réparties, dans un premier temps, dans huit grandes guildes trophiques. Dans un deuxième temps, après avoir analysé les éventuelles contraintes phylogénétiques, nous avons examiné, par analyse multivariée, les relations entre le régime alimentaire et la morphologie des espèces. Les résultats montrent que, indépendamment de la phylogénie, certaines des guildes trophiques peuvent être prédites d'après quelques attributs morphologiques (i.e. longueur relative de l'intestin, longueur standard et orientation de la bouche). Cela étant, ce lien entre régime alimentaire et caractéristiques morphologiques reste relativement faible, ce qui suggère que même si la morphologie limite les possibilités d'utilisation des ressources, cette limite est assez large pour permettre aux espèces de s'adapter à différentes conditions biotiques ou abiotiques locales.

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Section: Introductionmentioning

confidence: 99%

Dietary-morphological relationships in fish assemblages of small forested streams in the Bolivian Amazon

Ibáñez

Tedesco

Bigorne

et al. 2007

Aquat. Living Resour.

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“…Cadle & Greene, 1993), and its physical implications, is thought to strongly in¯uence the evolution of body form in vertebrates (e.g. Moermond, 1979;Miles & Ricklefs, 1984;Wikramanayake, 1990). Even in limbless, elongate vertebrates such as snakes, closely related species may be included in different morphological syndromes depending on which macrohabitat is explored (see e.g.…”

Section: Introductionmentioning

confidence: 99%

Diversity and evolution of macrohabitat use, body size and morphology in a monophyletic group of Neotropical pitvipers (Bothrops)

et al. 2001

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The Neotropical pitviper genus Bothrops comprises about 40 species, which occur in all main ecosystems of cis-Andean South America. We explored the relationships of body size and form (tail length and stoutness) with macrohabitat use in 20 forms of Bothrops. Semi-arboreal habits appeared only in forest forms. Semiarboreals are signi®cantly more slender and have longer tails than terrestrials; body size is not signi®cantly different between terrestrials and semi-arboreals. Within Bothrops, independent contrasts for macrohabitat use were signi®cantly correlated with contrasts of tail size (positively) and stoutness (negatively); thus, the more arboreal the species, the longer its tail and the more slender its body. Contrasts of adult body size seems to remain constant over the lower range of macrohabitat use, but to decrease in species of Bothrops which are more arboreal. Reconstructions of character states indicate that: (1) the ancestor of Bothrops was a small, stout, terrestrial species; (2) semi-arboreal habits appeared one to three times in the genus; (3) a decrease in stoutness and an increase in tail length occurred along with an increase in arboreality in some clades. Although macrohabitat use seems to be important in determining body form in Bothrops, our results also indicate that tail size, stoutness and body size may also be affected by selective agents other than macrohabitat use. The selective agents responsible for the shifts in macrohabitat use in Bothrops are still uncertain, although they may have included prey availability and/or predation pressure. The plasticity of macrohabitat use, morphology and body size described in this study may have been key features that facilitated the highly successful ecological diversi®cation of Bothrops in South America.

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“…Both characteristics are related to feeding behavior and foraging performance (Watson & Balon, 1984;Wikramanayake, 1990). In addition, females of Jaboti Lake were characterized by having wider heads, which are directly related to the size of the food consumed (Winemiller, 1991;Oliveira et al, 2010).…”

Section: Discussionmentioning

confidence: 99%

Intraspecific ecomorphological variations in Poecilia reticulata (Actinopterygii, Cyprinodontiformes): comparing populations of distinct environments

Mise

Souza

Pagotto

et al. 2015

Iheringia, Sér. Zool.

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ABSTRACT. Morphological variations, according to the principles of ecomorphology, can be related to different aspects of the organism way of life, such as occupation of habitats and feeding behavior. The present study sought to examine the intraspecific variation in two populations of Poecilia reticulata Peters, 1859, that occur in two types of environments, a lotic (Maringá Stream) and a lentic (Jaboti Lake). Due to a marked sexual dimorphism, males and females were analyzed separately. Thus, the proposed hypotheses were that the populations that occur in distinct environments present morphological differences. The morphological variables were obtained using morphometric measurements and the ecomorphological indexes. The data were summarized in a Principal Component Analysis (PCA). A Multivariate Analysis of Variance (Manova) was made to verify significant differences in morphology between the populations. Males and females showed similar ecomorphological patterns according to the environment they occur. In general the population from Maringá Stream had fins with major areas, and the Jaboti Lake population eyes located more dorsally. Additionally, others morphological differences such as wider mouth of the males from Maringá Stream, wider heads on Jaboti Lake females and more protractible mouths on males from Jaboti Lake suggest a set of environmental variables that can possibly influence the ecomorphological patterns of the populations, as the water current, availability of food resources and predation. In summary, the initial hypotheses could be confirmed, evidencing the occurrence of distinct ecomorphotypes in the same species according to the environment type.KEYWORDS. Ecomorphological indexes, Poeciliidae, habitat occupation, ecomorphotypes. RESUMO. Variações ecomorfológicas intraespecíficas emPoecilia reticulata (Actinopterygii, Cyprinodontiformes): comparando populações de ambientes distintos. Variações morfológicas, de acordo com os princípios da ecomorfologia, podem ser relacionadas a diferentes aspectos do modo de vida dos organismos, como a ocupação de hábitats e comportamento alimentar. O presente estudo buscou analisar essas variações em nível intraespecífico em duas populações de Poecilia reticulata Peters, 1859, que ocorrem em dois tipos de ambientes, um lótico (ribeirão Maringá) e um lêntico (lago Jaboti). Por apresentar um acentuado dimorfismo sexual machos e fêmeas foram analisados separadamente. Assim, a hipótese proposta foi de que as populações, que ocorrem em ambientes distintos, possuem diferenças morfológicas. As variáveis morfológicas foram obtidas por meio de medidas morfométricas e índices ecomorfológicos. Os dados foram sumarizados em uma Análise de Componentes Principais. Também foi feita uma Análise de Variância Multivariada para verificar se existe diferença significativa na morfologia entre as populações. Machos e fêmeas mostraram padrões ecomorfológicos semelhantes de acordo com o ambiente em que ocorrem. No geral, a população do ribeirão Maringá apresentou nadadeiras com maiore...

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Ecomorphology and Biogeography of a Tropical Stream Fish Assemblage: Evolution of Assemblage Structure

Cited by 127 publications

References 26 publications

Dietary-morphological relationships in fish assemblages of small forested streams in the Bolivian Amazon

Dietary-morphological relationships in fish assemblages of small forested streams in the Bolivian Amazon

Diversity and evolution of macrohabitat use, body size and morphology in a monophyletic group of Neotropical pitvipers (Bothrops)

Intraspecific ecomorphological variations in Poecilia reticulata (Actinopterygii, Cyprinodontiformes): comparing populations of distinct environments

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