Roselene S. Costa-Ferreira

Universidade Estadual Paulista (Unesp)

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Eliane Gonçalves‐de‐Freitas

Universidade Estadual Paulista (Unesp)

Thaís Billalba Carvalho

Universidade Federal do Amazonas

Marcela Cesar Bolognesi

Universidade Estadual Paulista (Unesp)

Manuela Lombardi Brandão

Universidade Estadual Paulista (Unesp)

Francine Zocoler de Mendonça

Universidade Federal de Goiás

Gisele Colognesi

Universidade Estadual Paulista (Unesp)

G. L. Volpato

Universidade Estadual Paulista (Unesp)

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Universidade Estadual Paulista (Unesp)

Universidade de São Paulo

Núcleo de Pesquisas Aplicadas (Brazil)

Fundação Faculdade de Medicina

National Council for Scientific and Technological Development

Instituto de Botânica

Animal Welfare Institute

Universidade Federal de Goiás

Universidade Federal do Amazonas

Universidade Federal do Recôncavo da Bahia

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Water temperature affects aggressive interactions in a Neotropical cichlid fish

Neotropical Ichthyology (2018)

Manuela Lombardi Brandão Gisele Colognesi Marcela Cesar Bolognesi Roselene S. Costa-Ferreira Thaís Billalba Carvalho

ABSTRACT Changes in water temperature may affect the aggressive behavior of aquatic organisms, such as fish, either by changing some physiological mechanisms or by increasing the probability of encounters between individuals as a result of variation in their swimming activity. In our study, we evaluated the influence of increasing and decreasing temperature on the aggressive behavior of the Neotropical cichlid fish Cichlasoma paranaense. Firstly, we tested the critical thermal maximum (CTMax) tolerated by this species. Then, we tested the effect of decreasing or increasing the water temperature in 6o C (starting at 27° C) on the aggressive interactions of fish under isolation or housed in groups. We found a CTMax value of 39° C for C. paranaense. We also observe that a 6° C decrease in water temperature lowers swimming activity and aggressive interactions in both isolated and group-housed fish, as expected. On the other hand, the increase in temperature had no effect on the fish’s aggressive behavior, neither for isolated nor for grouped fish. We concluded that C. paranaense shows high tolerance to elevated temperatures and, in turn, it does not affect aggressive behavior. Nevertheless, we cannot dismiss possible effects of elevated temperatures on aggressive interactions over longer periods.

Cichlid

10.1590/1982-0224-20170081

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Citations (35)

Water temperature affects aggressive interactions in a Neotropical cichlid fish

Figshare (2018)

Manuela Lombardi Brandão Gisele Colognesi Marcela Cesar Bolognesi Roselene S. Costa-Ferreira Thaís Billalba Carvalho

Cichlid

10.6084/m9.figshare.6045134

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Substratum choice for nesting in male Nile tilapia Oreochromis niloticus

Journal of Fish Biology (2010)

Francine Zocoler de Mendonça G. L. Volpato Roselene S. Costa-Ferreira Eliane Gonçalves‐de‐Freitas

Four substrata were offered to groups of adult Nile tilapia Oreochromis niloticus (one male and two females) simultaneously: pure sand, a mixture of sand and shells, stones and no substratum. The results showed that males chose to dig nests in a lighter and more homogeneous substratum.

Nile tilapia

Nesting (process)

10.1111/j.1095-8649.2010.02754.x

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The effect of increased light intensity on the aggressive behavior of the Nile tilapia, Oreochromis niloticus (Teleostei: Cichlidae)

Zoologia (Curitiba) (2013)

Thaís Billalba Carvalho Francine Zocoler de Mendonça Roselene S. Costa-Ferreira Eliane Gonçalves‐de‐Freitas

Animals show behavioral and physiological changes that emerge in response to environmental perturbations (i.e., emergency life-history stages). In this study, we investigate the effects of light intensity on aggressive encounters and social stability in groups of adult male Nile tilapia, Oreochromis niloticus (Linnaeus, 1758). The study compared the behavior observed under low (280.75 ± 50.60 lx) and high (1394.14 ± 520.32 lx) light intensities, with 12 replicates for each treatment. Adult fish were isolated in 36-L aquaria for 96 hours, and three males were grouped for 11 days in 140-L aquaria. Agonistic behavior was video-recorded (10 min/day) on the 3rd, 5th, 7th, and 9th day to quantify aggressive interactions and social stability. There was an effect of light intensity and day of observation on the total number of agonistic behaviors performed by the fish group. Besides, increased frequency of aggressive interactions (the sum of the four sessions) by the alpha, beta and gamma fish occurred at the higher light intensity. The dominance ranks of the fish remained unchanged across the observation sessions under both the low and high light intensities. We concluded that enhanced light intensity has a cumulative effect that increases the aggressiveness of the Nile tilapia but that this effect is not sufficiently strong to destabilize the social hierarchy.

Nile tilapia

Agonistic behaviour

Teleostei

Light intensity

Dominance hierarchy

Social hierarchy

10.1590/s1984-46702013000200001

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Citations (42)