The aggressive behavior of Nile tilapia introduced into novel environments with variation in enrichment

Barreto, Rodrigo Egydio; Carvalho, Graziele G. Arantes; Volpato, Gilson Luiz

doi:10.1016/j.zool.2010.09.001

Cited by 56 publications

(35 citation statements)

References 61 publications

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“…The Nile tilapia and the pearl cichlid are aggressive fish species [18]–[21] and, in nature, the former appears to demonstrate a competitive advantage over the pearl cichlid. Evidence for this advantage is suggested by the association between the occurrence of Nile tilapia and the decline of pearl cichlid populations, a phenomenon intensified by habitat degradation [14].…”

Section: Discussionmentioning

confidence: 99%

“…The Nile tilapia and the pearl cichlid are both aggressive fish species [18]–[21], yet the Nile tilapia appears to show a competitive advantage over the pearl cichlid [14]. In nature, the most common type of resource competition involves aggressive disputes [22], and the contestants are likely to differ in their fighting ability, termed ‘resource-holding potential’ (RHP) [23]–[25], reviewed by Arnott & Elwood [26].…”

Section: Introductionmentioning

confidence: 99%

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Aggressiveness Overcomes Body-Size Effects in Fights Staged between Invasive and Native Fish Species with Overlapping Niches

et al. 2012

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Approximately 50 years ago, Nile tilapia were accidentally introduced to Brazil, and the decline of pearl cichlid populations, which has been intensified by habitat degradation, in some locations has been associated with the presence of Nile tilapia. There is, however, little strong empirical evidence for the negative interaction of non-native fish populations with native fish populations; such evidence would indicate a potential behavioural mechanism that could cause the population of the native fish to decline. In this study, we show that in fights staged between pairs of Nile tilapia and pearl cichlids of differing body size, the Nile tilapia were more aggressive than the pearl cichlid. Because this effect prevailed over body-size effects, the pearl cichlids were at a disadvantage. The niche overlap between the Nile tilapia and the pearl cichlid in nature, and the competitive advantage shown by the Nile tilapia in this study potentially represent one of several possible results of the negative interactions imposed by an invasive species. These negative effects may reduce population viability of the native species and cause competitive exclusion.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Aggressiveness Overcomes Body-Size Effects in Fights Staged between Invasive and Native Fish Species with Overlapping Niches

et al. 2012

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“…Not all studies, however, indicate that environmental enrichment decreases aggression. Using Nile tilapia, Barreto et al 46 found that environmental enrichment, by providing more resources worth defending, actually increased aggression. However, spatial heterogeneity that is not resource based may create a different framework for agonistic behaviors.…”

Section: Social Behavior In Lead-exposed Zebrafishmentioning

confidence: 99%

Experimental Design Affects Social Behavior Outcomes in Adult Zebrafish Developmentally Exposed to Lead

Weber

Ghorai

2013

Zebrafish

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Lead (Pb(2+)) affects neuronal and endocrine systems that influence social interactions. By providing potential hiding locations, spatial heterogeneity may affect Pb(2+)-induced behavioral outcomes. Therefore, a test chamber was designed into which a refuge could be inserted. The refuge allowed test subjects to escape from the mirror image that stimulated agonistic interactions. Behaviors with a mirror were compared with baseline activity patterns without a mirror. Adult (12-month old) male and female zebrafish, exposed to Pb(2+) (0-10 μM) as embryos (2-24 hours post fertilization), were tested individually for 5 min in each chamber design within 2 h of feeding. Behaviors were evaluated for % time in mirror zone, distance traveled (=activity level), and attacks on the mirror image. When there was no refuge, significant concentration-dependent increases occurred in male % time in mirror zone, activity level, and number of attacks. Increases in these variables were less pronounced in females. When there was a refuge, there were significant differences for males only in activity level and attacks at the higher developmental exposure concentrations; % time in mirror zone followed a similar pattern and level as without refuge. Females displayed Pb(2+)-induced behavioral changes only for attacks on mirror. Since the presence of refuges that is, environmental enrichment, reduced Pb(2+)-induced agonistic behavior in both sexes, experimental spatial design can be considered an important factor when interpreting behavioral outcomes.

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“…Tilapia, being an exotic species, combined with its generalist eating habit (Attayde et al, 2007) and aggressive and territorial behavior, favors its competition for environmental resources, which can drastically alter the local biota (Barreto et al, 2011), partly explaining its invading potential (Kolar & Lodge, 2002). Changes in the native species trophic guilds were expected, but according to the Food Similarity Index, the number of guilds did not vary during the studied period.…”

Section: Discussionmentioning

confidence: 90%

“…For being a rustic species, it tolerates a wide variation of abiotic parameters, such as temperature, ammonia, dissolved oxygen, and shows a high reproductive rate (Kolar & Lodge, 2002). These characteristics, combined with general eating habits (Attayde et al, 2007) and aggressive and territorial behavior, favor the competition for environmental resources, which can drastically alter the local biota (Barreto et al, 2011), explaining in parts its invading potential (Kolar & Lodge, 2002).…”

Section: Introductionmentioning

confidence: 99%

The impact of a biomanipulation experiment on the ichthyofauna diet from a neotropical reservoir in Brazilian semiarid

et al. 2018

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Cite as: Moura, C.C.F.L. et al. The impact of a biomanipulation experiment on the ichthyofauna diet from a neotropical reservoir in Brazilian semiarid. Acta Limnologica Brasiliensia, 2018, vol. 30, e107. Abstract: Aim:To evaluate the impact of a biomanipulation experiment on the feeding of fish species from a neotropical semiarid reservoir, before and after the removal of the exotic species Oreochromis niloticus. Methods: The values of Food Index were analyzed for six species:

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The aggressive behavior of Nile tilapia introduced into novel environments with variation in enrichment

Cited by 56 publications

References 61 publications

Aggressiveness Overcomes Body-Size Effects in Fights Staged between Invasive and Native Fish Species with Overlapping Niches

Aggressiveness Overcomes Body-Size Effects in Fights Staged between Invasive and Native Fish Species with Overlapping Niches

Experimental Design Affects Social Behavior Outcomes in Adult Zebrafish Developmentally Exposed to Lead

The impact of a biomanipulation experiment on the ichthyofauna diet from a neotropical reservoir in Brazilian semiarid

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