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The attraction trick: males in early stages of disease become more chemically attractive to Nile tilapia (Oreochromis niloticus) females
Year:
2021
Source of publication :
Journal of Fish Biology
Authors :
Barki, Assaf
;
.
Volume :
Co-Authors:

V. S Rossi, 
I. M Mello, 
A Barki, 
P. C Giaquinto

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

In aquatic systems, olfaction plays an important role in acquiring information about the social environment and influences important behaviours in various contexts, including predator avoidance, foraging, aggressive and reproductive behaviour and mate selection. As the presence of diseases might modify individual odour, fish may use the variability in conspecifics odours as an indicator of the health status and infectious load of potential mates. Here, female Nile tilapia were tested for their ability to detect infected males and discriminate between bacterial infected and uninfected individuals by means of chemical cues. Females were allowed to choose between the odours of males infected by A. hydrophila bacteria and uninfected males. Our findings show that female Nile tilapia initially showed a preference for infected males in terms of their first choice in a dichotomous choice test, but the total duration of time spent with the stimulus from infected males was not longer than for the uninfected males. This may indicate that males at early stages of infection, i.e. without advanced clinical signs of infection, emit odours that allow them to enjoy the benefits of socialization when the infection is not yet detected by conspecifics. Thus, in the context of reproduction, males might attract female partners and have some chance of reproducing, before being avoided.

Note:
Related Files :
fish behavior
fish disease
nile tilapia (Oreochromis nilocticus)
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More details
DOI :
10.1111/jfb.14870
Article number:
0
Affiliations:
Database:
PubMed
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
55881
Last updated date:
02/03/2022 17:27
Creation date:
09/08/2021 15:44
You may also be interested in
Scientific Publication
The attraction trick: males in early stages of disease become more chemically attractive to Nile tilapia (Oreochromis niloticus) females

V. S Rossi, 
I. M Mello, 
A Barki, 
P. C Giaquinto

The attraction trick: males in early stages of disease become more chemically attractive to Nile tilapia (Oreochromis niloticus) females .

In aquatic systems, olfaction plays an important role in acquiring information about the social environment and influences important behaviours in various contexts, including predator avoidance, foraging, aggressive and reproductive behaviour and mate selection. As the presence of diseases might modify individual odour, fish may use the variability in conspecifics odours as an indicator of the health status and infectious load of potential mates. Here, female Nile tilapia were tested for their ability to detect infected males and discriminate between bacterial infected and uninfected individuals by means of chemical cues. Females were allowed to choose between the odours of males infected by A. hydrophila bacteria and uninfected males. Our findings show that female Nile tilapia initially showed a preference for infected males in terms of their first choice in a dichotomous choice test, but the total duration of time spent with the stimulus from infected males was not longer than for the uninfected males. This may indicate that males at early stages of infection, i.e. without advanced clinical signs of infection, emit odours that allow them to enjoy the benefits of socialization when the infection is not yet detected by conspecifics. Thus, in the context of reproduction, males might attract female partners and have some chance of reproducing, before being avoided.

Scientific Publication
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