Ontogenetic shifts in digestive tract morphology and diet of fish larvae of the Itaipu Reservoir, Brazil

Makrakis, Maristela Cavicchioli; Nakatani, Keshiyu; Bialetzki, Andréa; Sanches, Paulo Vanderlei; Baumgartner, Gilmar; Gomes, Luiz Carlos

doi:10.1007/s10641-004-6596-9

Cited by 58 publications

(73 citation statements)

References 13 publications

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“…Shifts from more frequent items, as the fish grow, as obtained for the young stages of A. lacustris and P. mesopotamicus in this study, with reduction in Brachionus and Lecane percentage, to the increase in consumption of larger organisms such as cladocerans, were registered for larvae of I. labrosus and H. edentatus by Makrakis et al (2005).…”

Section: Discussionsupporting

confidence: 75%

<b>Diet of fish (Characiformes: Characidae) during early developmental stages in the Upper Paraná river basin, Brazil

Soares¹,

Hayashi²,

Faria-Soares³

et al. 2017

Acta Sci. Biol. Sci.

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ABSTRACT. This study analyzed the diet during early developmental stages of Astyanax lacustris (AA), Piaractus mesopotamicus (PM), Megaleporinus obtusidens (MO) and Prochilodus lineatus (PL), under experimental conditions. Fish larvae, 350 of each species, were stocked separately in 16 fiber-cement tanks (500 L), from which, three larvae of each species were collected every three days, for 36 days. Tanks were fertilized (1.5 g NPK-7: 14: 8) and had 50% of the surface with macrophytes. Larvae were grouped in age classes = I: 5 to 11, II: 14 to 20, III: 23 to 29 and IV: 32 to 38 days and, dissected for analysis of the digestive tract. Methodologies of dominance, frequency of occurrence and points of food items were used. For AA and PM larvae, measurements were taken for the number and size of organisms to determine the percent participation in biovolume. Changes in diets of larvae in different age classes were found as well as between different species, with the same age. Rotifers were dominant in the content of digestive tracts of all species at Class I, and the larvae diets became more distinct with increasing age, in which AA consumed mainly rotifers, PM, larger organisms (mainly cladocerans), PL, algae (diatoms as the main item) and PP with a more diversified diet (rotifers, ostracodes and algae). In conclusion, early stages of these species presented distinct diets, undergoing remarkable changes in the first 38 days of life.

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Section: Discussionsupporting

confidence: 75%

<b>Diet of fish (Characiformes: Characidae) during early developmental stages in the Upper Paraná river basin, Brazil

Soares¹,

Hayashi²,

Faria-Soares³

et al. 2017

Acta Sci. Biol. Sci.

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“…É comum, ao longo do desenvolvimento, larvas e juvenis de peixes incluírem em suas dietas presas maiores, bem como diversificar os itens consumidos (Makrakis et al, 2005;Nunn et al, 2007). Essas alterações frequentemente coincidem com a mudança no uso do habitat ou no comportamento ao longo do desenvolvimento (Nunn et al, 2012), além de estarem fortemente relacionadas às mudanças morfológicas (Makrakis et al, 2005), permitindo ingerir, digerir e absorver os diferentes tipos de alimentos e explorar uma grande diversidade de itens disponíveis (Silva et al, 2016), de acordo com morfologia do seu trato digestório.…”

Section: Discussionunclassified

Variação temporal e espacial na dieta de Trachelyopterus galeatus (Siluriformes, Auchenipteridae) em dois reservatórios no semiárido Neotropical

Sousa

Oliveira

et al. 2017

Iheringia, Sér. Zool.

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ABSTRACT. Temporal and spatial variation in diet Trachelyopterus galeatus (Siluriformes, Auchenipteridae) in two reservoirs in the semi-arid Neotropical. Fish feeding provides data for discussion of theoretical aspects serving purposes as the basic knowledge of the biology of a species by understanding the trophic organization in each environment. The objective was to analyze the food composition and morphology associated with the eating habits of Trachelyopterus galeatus (Linnaeus, 1766) and evaluates the dietary changes over time. The collections of individuals took place on a quarterly basis, during the months of February, May, August and November 2013, through gillnets with different meshes distributed in eight points in the Santa Cruz reservoir and five points in the Umari reservoir, both located in the Rio Grande do Norte. From the items identified in diets were obtained the frequencies of occurrence and volumetric, combined in the calculation of Alimentary Index (IAi). The volumes of the items were ordered in NMDS and their differences tested by PERMANOVA. The contribution of each food item and differences between reservoirs was assessed by SIMPER analysis. The analysis of stomach contents allowed the classification of the species as carnivorous, noting there are significant temporal changes in the species diet, with the morphological characteristics according to the consumption of food items.KEYWORDS. Diet, trophic organization, fish, temporal variation.RESUMO. Alimentação de peixes propicia dados para discussão de aspectos teóricos atendendo a propósitos como o conhecimento básico da biologia de uma determinada espécie através do entendimento da organização trófica em um determinado ambiente. Assim, objetivou-se analisar a composição alimentar e a morfologia, associadas ao hábito alimentar de Trachelyopterus galeatus (Linnaeus, 1766) e avaliar as alterações da dieta ao longo do tempo. As coletas dos indivíduos ocorreram trimestralmente, durante os meses de fevereiro, maio, agosto e novembro de 2013, por meio de redes de esperas com diferentes malhas distribuídas em oito pontos no reservatório de Santa Cruz e em cinco pontos no reservatório de Umari, ambos localizados no Rio Grande do Norte. Dos itens identificados da dieta foram obtidas as frequências de ocorrência e volumétrica, combinadas no cálculo de Índice Alimentar (IAi). Os volumes dos itens foram ordenados em NMDS e as suas diferenças testadas em PERMANOVA, a contribuição de cada item alimentar para as diferenças entre os reservatórios foi avaliada através da análise SIMPER. As análises dos conteúdos alimentares permitiram a classificação da espécie como carnívora, constatando-se significativas alterações temporais em sua dieta, com as características morfológicas em conformidade ao consumo dos itens alimentares.PALAVRAS-CHAVE. Dieta, organização trófica, peixe, variação temporal.Alimentação é um dos mais importantes aspectos da biologia dos peixes, que interfere diretamente na estrutura e composição de populações . A compreensão da utilização d...

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“…The survival and growth in this phase depends on, among other factors, the degree of development of some organs and on structures necessary for feeding, such as mouth, digestive tract (Makrakis et al, 2005(Makrakis et al, , 2008, swimming ability, which is related to the success in food search, visual acuity (Yúfera, Darias, 2007;Makrakis et al, 2008), and food availability (Sánchez-Velasco, 1998). Larvae that cannot overcome these limitations in time, become vulnerable to starvation and, consequently, to predation (Gisbert et al, 2004;Dou et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Once the endogenous reserves are exhausted, the larvae need to make a successful transition from endogenous to exogenous feeding to assure their survival and growth in that phase (Blaxter, Ehrlich, 1974). Some factors, such as availability and composition of the food (Sánchez-Velasco, 1998), temperature, photoperiod (Paul, 1983;Porter, Bailey, 2007), development of the digestive tract, visual acuity, and the swimming ability of the larvae (Makrakis et al, 2005), are important for a successful feeding transition. When these factors do not comply with the actual larval stage, the larvae may not succeed in their initial feeding, and become vulnerable to starvation (Gisbert et al, 2004;Zhang et al, 2009)…”

Section: Introductionmentioning

confidence: 99%

Effects of delayed first feeding on growth of the silver catfish larvae Rhamdia voulezi (Siluriformes: Heptapteridae)

et al. 2017

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The effects of the timing of first feeding on the point-of-no-return (PNR) and growth of laboratory reared silver catfish Rhamdia voulezi larvae were studied. The experiment began immediately after the complete absorption of the yolk sac, 3 days after hatching (DAH). , and 9 th DAH. Zooplankton and newly-hatched Artemia spp. were used to feed the larvae. To evaluate the effect of food deprivation on growth, the standard length and weight of 594 larvae were assessed. Larval growth was significantly affected by the time of first exogenous feeding. The larvae fed from 3 rd to 5 th DAH showed a significantly higher development than those fed from 6 th DAH. The larvae reached the PNR on 6 th DAH. Survival and larval growth strongly depended on the timing of initial feeding. In order to avoid potential mortality by starvation and obtain good growth, the silver catfish larvae R. voulezi must establish successful initial feeding within 5 days after hatching. Keywords

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Ontogenetic shifts in digestive tract morphology and diet of fish larvae of the Itaipu Reservoir, Brazil

Cited by 58 publications

References 13 publications

<b>Diet of fish (Characiformes: Characidae) during early developmental stages in the Upper Paraná river basin, Brazil

<b>Diet of fish (Characiformes: Characidae) during early developmental stages in the Upper Paraná river basin, Brazil

Variação temporal e espacial na dieta de Trachelyopterus galeatus (Siluriformes, Auchenipteridae) em dois reservatórios no semiárido Neotropical

Effects of delayed first feeding on growth of the silver catfish larvae Rhamdia voulezi (Siluriformes: Heptapteridae)

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