How Often Do Fishes "Run on Empty"?

Arrington, D. Albrey; Winemiller, Kirk O.; Loftus, William F.; Akın, Şenol

doi:10.2307/3072046

Cited by 71 publications

(111 citation statements)

References 24 publications

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“…The observed proportion of individuals of a species having empty stomachs has been used as an index of instantaneous energy balance for some organisms such as lizards (Huey et al, 2001), and fishes (Arrington et al, 2002). The idea is that individuals having empty stomachs are assumed to be in negative energy balance, depending on reserve stores (at least at that moment) provided by the incoming of previous feeding as source for metabolic processes and maintenance of energy needs (Boivin and Power, 1990;Huey et al, 2001;Arrington et al, 2002). Conversely, if individuals have food in their stomachs they will be gaining energy and thus, will be in positive energy balance (Huey et al, 2001).…”

Section: Itemsmentioning

confidence: 99%

Living together, sometimes feeding in a similar way: the case of the syntopic hylid frogs Hypsiboas raniceps and Scinax acuminatus (Anura: Hylidae) in the Pantanal of Miranda, Mato Grosso do Sul State, Brazil

2010

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taxonomically and thus, also tend to share physiological and behavioural traits (see Menin et al., 2005). Therefore, a clear understanding of the relationship on niche overlap, similarity and competition among species is necessary to answer questions on community structure (Lawlor, 1980). IntroductionSyntopic related species are expected to be exposed to a similar array of potential prey, especially if they share activity period, body size and microhabitat features (e.g. Pianka, 1986;Sluys and Rocha, 1998; Guimarães and Bastos, 2003). This may result in considerable overlap of prey consumption, especially if they are closely related AbstractWe studied the feeding ecology of two Hylinae anurans (Hypsiboas raniceps and Scinax acuminatus), living sympatrically and syntopically in the Pantanal of Miranda, Mato Grosso do Sul State, Brazil. The two hylid species had similar relative mouth width but differed in body size. The diet of the two frog species were composed of arthropodan prey. Both species consumed 11 different prey types, of which seven were common among them. Hypsiboas raniceps had a larger niche breadth (B A = 0.64) than S. acuminatus (B A = 0.48). Trophic niche overlap among frog species was 60.7 %. Our data are suggestive that although for many anurans the diet simply tend to reflect prey availability in the microhabitat, these two frog species, despite sharing similar microhabitat and period of activity (thus potentially exposed to a similar array of preys), tends to differ somewhat in diet (about 40%) which may result from some intrinsic ecological aspects to each of them (e.g. ecophysiology) and/or differences in body size.

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Section: Itemsmentioning

confidence: 99%

Living together, sometimes feeding in a similar way: the case of the syntopic hylid frogs Hypsiboas raniceps and Scinax acuminatus (Anura: Hylidae) in the Pantanal of Miranda, Mato Grosso do Sul State, Brazil

2010

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“…This result varied among orders (Characiformes = 7.4%, Perciformes = 16.6% and Siluriformes = 21.9%), and among species (0% to 67.4%). Arrington et al (2002) traits related to diurnal or nocturnal activity of species associated with their trophic levels. Piscivorous species had the greater percentage of empty stomachs (e.g.…”

Section: Diets Analysis and Trophic Guildsmentioning

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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“…It is likely, therefore, that the strict piscivorous behavior of C. piquiti is associated with a high diversity and abundance of small-sized fish in littoral areas of the reservoir, as small-sized species are common in the rio Tocantins basin (Lucinda et al, 2007;Soares et al, 2009). In addition, the high occurrence of stomachs with food contrasts with patterns found for piscivorous fish, in which empty stomachs prevail (Jepsen et al, 1997;Arrington et al, 2002;Bacheler et al, 2004), indicating resource availability and continuous feeding activity in Lajeado reservoir.…”

Section: Discussionmentioning

confidence: 63%

Feeding and reproductive ecology of Cichla piquiti Kullander & Ferreira, 2006 within its native range, Lajeado reservoir, rio Tocantins basin

2015

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Cichla piquiti is endemic to the Tocantins-Araguaia river basin, but information about its biology is restricted to populations introduced in other basins. In order to fill this gap, we investigated the feeding ecology and reproductive dynamics of C. piquiti in Lajeado reservoir, rio Tocantins. A total of 270 fish were collected between November 2010 and October 2011. The diet is rich and composed of at least 23 resources, predominantly fish (at least 19 species). We observed no clear influence of sex, periods and ontogeny on diet, which was basically composed of Characidae and Cichlidae. Considering its reproductive dynamics, immature, reproductive and non-reproductive fish were recorded during the whole study, and reproductive effort did not differ among periods. Cichla piquiti also showed no pattern of energy allocation between reproductive and somatic activities. These results indicate that reproduction is occurring throughout the year and that this activity is not synchronized among individuals. In conclusion, this study presented valuable information on the ecology of C. piquiti within its natural range, which may subsidize management programs to conserve local stocks. This information may also provide theoretical insights to explain why C. piquiti, a voracious predator, is so harmful when introduced in non-Amazonian reservoirs.Cichla piquiti é uma espécie endêmica da bacia Tocantins-Araguaia, porém o conhecimento sobre sua biologia está amparado no estudo de populações introduzidas em outras bacias. Para preencher essa lacuna, o presente estudo investigou a ecologia alimentar e reprodutiva de C. piquiti no reservatório de Lajeado, rio Tocantins. Um total de 270 peixes foi coletado entre novembro/2010 e outubro/2011, na região superior do reservatório. A dieta da espécie é rica e envolveu a ingestão de pelo menos 23 recursos, com predomínio de peixes (pelo menos 19 espécies). Não observamos padrão de variação na dieta entre os sexos, períodos e ontogenia, com predomínio no consumo de Characidae e Cichlidae. Considerando a dinâmica reprodutiva, peixes imaturos, em reprodução e repouso foram registrados ao longo do ano, e o esforço reprodutivo (IGS) não diferiu entre os períodos. Cichla piquiti também não apresentou padrão claro de alocação de energia entre atividades somáticas e reprodutivas. Esses resultados indicam que a reprodução ocorre durante todo o ano e que essa atividade não é sincronizada entre os indivíduos. Concluindo, o presente estudo apresentou informações importantes sobre a ecologia de C. piquiti em sua área de distribuição natural, que devem embasar programas de manejo para a conservação dos estoques na região. Essas informações devem também fornecer suporte teórico para explicar porque C. piquiti, um predador voraz, é tão danoso quando introduzido em reservatórios não-Amazônicos.

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How Often Do Fishes "Run on Empty"?

Cited by 71 publications

References 24 publications

Living together, sometimes feeding in a similar way: the case of the syntopic hylid frogs Hypsiboas raniceps and Scinax acuminatus (Anura: Hylidae) in the Pantanal of Miranda, Mato Grosso do Sul State, Brazil

Living together, sometimes feeding in a similar way: the case of the syntopic hylid frogs Hypsiboas raniceps and Scinax acuminatus (Anura: Hylidae) in the Pantanal of Miranda, Mato Grosso do Sul State, Brazil

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

Feeding and reproductive ecology of Cichla piquiti Kullander & Ferreira, 2006 within its native range, Lajeado reservoir, rio Tocantins basin

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