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  Migração vertical nictemeral das larvas de Macrobrachium amazonicum num lago de várzea na Amazônia Central, Ilha do Careiro, Brasil

Moreira, L. C., & Odinetz Collart, O. (1993). Migração vertical nictemeral das larvas de Macrobrachium amazonicum num lago de várzea na Amazônia Central, Ilha do Careiro, Brasil. Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas, 12(3/4), 385-398.

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Genre: Journal Article
Other : Diel vertical migration of the prawn larvae of Macrobrachium amazonicum (HELLER, 1862) in a Central Amazonian floodplain lake, Careiro Island, Brazil

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 Creators:
Moreira, Luiz Carlos1, Author
Odinetz Collart, Olga1, Author
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1External Organizations, ou_persistent22              

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 Abstract: Prawn larvae of Macrobrachium amazonicum have been collected during six diel cycles in the epilimnion (surface and 2 m) from three different habitats of the Lago do Rei, Careiro Island. The larval distribution showed a significant increase in density at 22 hours regardless of season or habitat, which suggests a diel vertical migration pattern. The thermal stratification of the lake (mean differential of 0.5 °C between the surface and 2 m and 0.6 °C between 2 m and 4 m) suggests that this phenomena could be only partly related to a metabolic efficiency resulting from prawns residing at cooler depths during the day. In shallow tropical waters, predation by visually dependent planktivores can be a more important factor in the adaptative significance of the diel distribution of the macrozooplankton than a low thermal stratification. The diurnal feeding activity found in the predominant planktivores fish species of the Careiro lake reinforces this hypothesis.

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Language(s): por - Portuguese
 Dates: 1993-12
 Publication Status: Published in print
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Title: Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas
  Other : Amazoniana
Source Genre: Journal
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Publ. Info: Kiel : Kommissions-Verlag W.G. Mühlau
Pages: - Volume / Issue: 12 (3/4) Sequence Number: - Start / End Page: 385 - 398 Identifier: ISSN: 0065-6755
CoNE: https://pure.mpg.de/cone/journals/resource/954925458030