Ventilation rates indicate stress-coping styles in Nile tilapia

Barreto, Rodrigo Egydio; Volpato, Gilson Luiz

doi:10.1007/s12038-011-9111-4

Cited by 49 publications

(47 citation statements)

References 28 publications

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“…Our results also support the use of Ventilation frequency (VF) as an indicator of behavioural-physiological traits by showing that VF is a good tool for predicting feeding behaviour in the same context. The same positive correlation between VF and DAI were also found by Barreto & Volpato (2011). In summary, such behavioural responses have also been described in other fish species (Overli et al 2002;MacKenzie et al 2009;Silva et al 2010;Martins et al 2011) corroborating the idea that by choosing and tailoring behavioural tests different behavioural profiles can be accurately identified.…”

Section: Accepted Articlesupporting

confidence: 81%

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Thermal preference predicts animal personality in Nile tilapia Oreochromis niloticus

Cerqueira

Rey

Silva

et al. 2016

Journal of Animal Ecology

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Summary1. Environmental temperature gradients provide habitat structure in which fish orientate and individual thermal choice may reflect an essential integrated response to the environment. The use of subtle thermal gradients likely impacts upon specific physiological and behavioural processes reflected as a suite of traits described by animal personality. In this study we examine the relationship between thermal choice, animal personality and the impact of infection upon this interaction.2. We predicted that thermal choice in Nile tilapia Oreochromis niloticus reflects distinct personality traits and that under a challenge individuals exhibit differential thermal distribution. Accepted ArticleThis article is protected by copyright. All rights reserved.3. Nile Tilapia were screened following two different protocols: 1) a suite of individual behavioural tests to screen for personality and 2) thermal choice in a custom-built tank with a thermal gradient (T CH tank) ranging from 21 to 33 ºC. A first set of fish were screened for behaviour and then thermal preference and a second set were tested in the opposite fashion; thermal then behaviour. The final thermal distribution of the fish after 48 h was assessed reflecting final thermal preferendum. Additionally, fish were then challenged using a bacterial Streptococcus iniae model infection to assess the behavioural fever response of proactive and reactive fish.4. Results showed that individuals with preference for higher temperatures were also classified as proactive with behavioural tests and reactive contemporaries chose significantly lower water temperatures. All groups exhibited behavioural fever recovering personality-specific thermal preferences after 5 days.5. Our results show that thermal preference can be used as a proxy to assess personality traits in Nile tilapia and it is a central factor to understand the adaptive meaning of animal personality within a population.Importantly, response to infection by expressing behavioural fever overrides personality related thermal choice.

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Section: Accepted Articlesupporting

confidence: 81%

“…When time is higher, VF is lower and fish categorized as proactive (Barreto et al, 2009(Barreto et al, , 2011. Water flow was then restarted and fish were left to habituate for 30 min.…”

Section: Accepted Articlementioning

confidence: 99%

Thermal preference predicts animal personality in Nile tilapia Oreochromis niloticus

Cerqueira

Rey

Silva

et al. 2016

Journal of Animal Ecology

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“…The number of opercula openings, NumOper , as a breathing rate approach, was counted and registered for juveniles during the first minute of this test [34]. …”

Section: Methodsmentioning

confidence: 99%

Characterization of stress coping style in Senegalese sole ( Solea senegalensis ) juveniles and breeders for aquaculture

et al. 2016

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The aim of this work was to characterize stress coping styles of Senegalese sole (Solea senegalensis) juveniles and breeders and to select an operational behavioural screening test (OBST) that can be used by the aquaculture industry to classify and select between behavioural phenotypes in order to improve production indicators. A total of 61 juveniles and 59 breeders were subjected to five individual behavioural tests and two grouping tests. At the end of the individual tests, all animals were blood sampled in order to measure cortisol, glucose and lactate. Three tests (restraining, new environment and confinement) characterized the stress coping style behaviour of Senegalese sole juveniles and breeders and demonstrated inter-individual consistency. Further, the tests when incorporated into a principal components analysis (PCA) (i) identified two principal axes of personality traits: ‘fearfulness-reactivity’ and ‘activity-exploration’, (ii) were representative of the physiological axis of stress coping style, and (iii) were validated by established group tests. This study proposed for the first time three individual coping style tests that reliably represented proactive and reactive personalities of Senegalese sole juveniles and breeders. In addition, the three proposed tests met some basic operational criteria (rapid testing, no special equipment and easy to apply and interpret) that could prove attractive for fish farmers to identify fish with a specific behaviour that gives advantages in the culture system and that could be used to establish selection-based breeding programmes to improve domestication and production.

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“…Relationship between mean eye color pattern and mean ventilation rate during the isolation period (n = 94; r = 0.67; P < 0.001) Barreto and Volpato (2011) found out that the variation in the VR was a behavioral coping style in O. niloticus when the fish were introduced in a novel environment. The lower and higher rates of VR in most fish in the present study than the previously published values of 1.60-1.82 beat/sec (Barreto and Volpato, 2004) may be due to the effect of size and stress-coping group (i.e.…”

Section: Figmentioning

confidence: 98%

Eye Color Pattern During Isolation Indicates Stress-Coping Style in Nile Tilapia Oreochromis niloticus L.

Cruz¹,

Tauli²

2015

IJSRK

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Abstract. It has previously been shown that changes in eye color pattern (ECP) in Oreochromis niloticus is a consequence of a fish's relative position in the social hierarchy. However, it is still an open question if ECP during isolation is correlated to stress coping styles in fish such as ventilation rate (VR). To evaluate this, 94 all-male juvenile O. niloticus of similar size were introduced in a novel environment and were isolated in aquaria for 7 days. The ECP and VR of each fish were recorded daily during the isolation period. Eye color change was observed to be fractional changes of the color of the iris and sclera around the pupil which were transformed into scores ranging from 0 (no darkening) to 8 (total darkening). Results of the study showed that ECP was significantly correlated with VR, both individual daily values (r = 0.48, n = 658, P<0.001) and mean values (r = 0.68, n = 94, P<0.001). Thus, ECP indicates stress coping style in O. niloticus. Based on the trend of ECP values during isolation, fish with ECP values of less than 4 after the isolation period of 7 days may be classified as proactive individuals while those with ECP values of more than 4, as reactive individuals. The ECP is a good, easy and inexpensive tool for assessing both alertness and stress level in the fish.

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Ventilation rates indicate stress-coping styles in Nile tilapia

Cited by 49 publications

References 28 publications

Thermal preference predicts animal personality in Nile tilapia Oreochromis niloticus

Thermal preference predicts animal personality in Nile tilapia Oreochromis niloticus

Characterization of stress coping style in Senegalese sole ( Solea senegalensis ) juveniles and breeders for aquaculture

Eye Color Pattern During Isolation Indicates Stress-Coping Style in Nile Tilapia Oreochromis niloticus L.

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