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Condition factor variations over time and trophic position among four species of Characidae from Amazonian floodplain lakes: effects of an anomalous drought

Overview of attention for article published in Brazilian Journal of Biology, August 2017
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Title
Condition factor variations over time and trophic position among four species of Characidae from Amazonian floodplain lakes: effects of an anomalous drought
Published in
Brazilian Journal of Biology, August 2017
DOI 10.1590/1519-6984.166332
Pubmed ID
Authors

I. A. Tribuzy-Neto, K. G. Conceição, F. K. Siqueira-Souza, L. E. Hurd, C. E. C. Freitas

Abstract

The effects of extreme droughts on freshwater fish remain unknown worldwide. In this paper, we estimated the condition factor, a measure of relative fitness based on the relationship of body weight to length, in four fish species representing two trophic levels (omnivores and piscivores) from Amazonian floodplain lakes for three consecutive years: 2004, 2005 (an anomalous drought year), and 2006. The two omnivores, Colossoma macropomum and Mylossoma duriventre, exhibited trends consistent with their life cycles in 2004 and 2006: high values during the hydrologic seasons of high water, receding water, and low water, with a drop following reproduction following the onset of rising water. However during the drought year of 2005 the condition factor was much lower than normal during receding and low water seasons, probably as a result of an abnormal reduction in resource availability in a reduced habitat. The two piscivorous piranhas, Serrasalmus spilopleura and S. elongatus, maintained relatively stable values of condition factor over the hydrologic cycles of all three years, with no apparent effect of the drought, probably because the reduction in habitat is counterbalanced by the resulting increase in relative prey density. We suggest that if predictions of increasing drought in the Amazon are correct, predatory species may benefit, at least in the short run, while omnivores may be negatively affected.

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Mendeley readers

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The data shown below were compiled from readership statistics for 35 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 35 100%

Demographic breakdown

Readers by professional status Count As %
Researcher 4 11%
Student > Master 4 11%
Professor 4 11%
Student > Bachelor 4 11%
Student > Ph. D. Student 2 6%
Other 6 17%
Unknown 11 31%
Readers by discipline Count As %
Agricultural and Biological Sciences 14 40%
Environmental Science 5 14%
Unspecified 1 3%
Social Sciences 1 3%
Chemistry 1 3%
Other 0 0%
Unknown 13 37%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 29 August 2017.
All research outputs
#18,569,430
of 22,999,744 outputs
Outputs from Brazilian Journal of Biology
#221
of 291 outputs
Outputs of similar age
#244,368
of 318,836 outputs
Outputs of similar age from Brazilian Journal of Biology
#3
of 7 outputs
Altmetric has tracked 22,999,744 research outputs across all sources so far. This one is in the 11th percentile – i.e., 11% of other outputs scored the same or lower than it.
So far Altmetric has tracked 291 research outputs from this source. They receive a mean Attention Score of 3.2. This one is in the 17th percentile – i.e., 17% of its peers scored the same or lower than it.
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We're also able to compare this research output to 7 others from the same source and published within six weeks on either side of this one. This one has scored higher than 4 of them.