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Importance of biofilm as food source for shrimps (Farafantepenaeus paulensis) evaluated by stable isotopes (∂13C and ∂15N)

Abreu, Paulo Cesar; Ballester, Eduardo L. C.; Odebrecht, Clarisse; Wasielesky Jr., Wilson; Cavalli, Ronaldo O.; Granéli, Wilhelm LU and Anesio, Alexandre M. (2007) In Journal of Experimental Marine Biology and Ecology 347(1-2). p.88-96
Abstract
Abstract

The contribution of biofilm and artificial feeds for the growth of the pink shrimp Farfantepenaeus paulensis reared in tanks and net cages were evaluated by using stable isotope (δ13C and δ15N) analysis. In the net cage experiment, mass balance and mixing equations showed that the biofilm contribution to shrimp growth was over 49% of carbon and 70% of nitrogen. These data suggest that the artificial feed offered in this experiment, although ingested, was not properly incorporated in the shrimp tissue. In contrast, biofilm growing in tanks contributed little to the nitrogen incorporated by the shrimp (maximum of 29%). In this experiment, shrimp presented an unusually large isotope fractionation. These results imply that... (More)
Abstract

The contribution of biofilm and artificial feeds for the growth of the pink shrimp Farfantepenaeus paulensis reared in tanks and net cages were evaluated by using stable isotope (δ13C and δ15N) analysis. In the net cage experiment, mass balance and mixing equations showed that the biofilm contribution to shrimp growth was over 49% of carbon and 70% of nitrogen. These data suggest that the artificial feed offered in this experiment, although ingested, was not properly incorporated in the shrimp tissue. In contrast, biofilm growing in tanks contributed little to the nitrogen incorporated by the shrimp (maximum of 29%). In this experiment, shrimp presented an unusually large isotope fractionation. These results imply that the shrimp are selectively ingesting some items from the biofilm, or differentially assimilate specific items of the artificial feed, due to differential digestibility. The hypothesis of selective feeding of biofilm microorganisms was corroborated in the experiment with net cages, where shrimp preferentially consumed centric diatoms. This study also demonstrated that shrimp biofilm consumption and the presence of artificial feed largely influenced biofilm formation. The consumption of centric diatoms by shrimp seem to stimulate biofilm chlorophyll-a, while biofilm δ15N values measured in tanks indicate that microorganisms present in the biofilm absorbs nitrogen released by artificial feed after its decomposition. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
stable isotopes, microorganisms, feeding, biofilm, shrimp
in
Journal of Experimental Marine Biology and Ecology
volume
347
issue
1-2
pages
88 - 96
publisher
Elsevier
external identifiers
  • wos:000247666600008
  • scopus:34249826952
ISSN
0022-0981
DOI
10.1016/j.jembe.2007.03.012
language
English
LU publication?
yes
id
8a24b98f-1764-4d31-8401-af2df41094ab (old id 698005)
date added to LUP
2007-12-07 12:45:12
date last changed
2017-11-05 04:30:25
@article{8a24b98f-1764-4d31-8401-af2df41094ab,
  abstract     = {Abstract<br/><br>
The contribution of biofilm and artificial feeds for the growth of the pink shrimp Farfantepenaeus paulensis reared in tanks and net cages were evaluated by using stable isotope (δ13C and δ15N) analysis. In the net cage experiment, mass balance and mixing equations showed that the biofilm contribution to shrimp growth was over 49% of carbon and 70% of nitrogen. These data suggest that the artificial feed offered in this experiment, although ingested, was not properly incorporated in the shrimp tissue. In contrast, biofilm growing in tanks contributed little to the nitrogen incorporated by the shrimp (maximum of 29%). In this experiment, shrimp presented an unusually large isotope fractionation. These results imply that the shrimp are selectively ingesting some items from the biofilm, or differentially assimilate specific items of the artificial feed, due to differential digestibility. The hypothesis of selective feeding of biofilm microorganisms was corroborated in the experiment with net cages, where shrimp preferentially consumed centric diatoms. This study also demonstrated that shrimp biofilm consumption and the presence of artificial feed largely influenced biofilm formation. The consumption of centric diatoms by shrimp seem to stimulate biofilm chlorophyll-a, while biofilm δ15N values measured in tanks indicate that microorganisms present in the biofilm absorbs nitrogen released by artificial feed after its decomposition.},
  author       = {Abreu, Paulo Cesar and Ballester, Eduardo L. C. and Odebrecht, Clarisse and Wasielesky Jr., Wilson and Cavalli, Ronaldo O. and Granéli, Wilhelm and Anesio, Alexandre M.},
  issn         = {0022-0981},
  keyword      = {stable isotopes,microorganisms,feeding,biofilm,shrimp},
  language     = {eng},
  number       = {1-2},
  pages        = {88--96},
  publisher    = {Elsevier},
  series       = {Journal of Experimental Marine Biology and Ecology},
  title        = {Importance of biofilm as food source for shrimps (Farafantepenaeus paulensis) evaluated by stable isotopes (∂13C and ∂15N)},
  url          = {http://dx.doi.org/10.1016/j.jembe.2007.03.012},
  volume       = {347},
  year         = {2007},
}