Same-sized fish groups increase aggressive interaction of sex-reversed males Nile tilapia GIFT strain

Boscolo, Camila Nomura Pereira; Morais, Rosana Nogueira de; Gonçalves-de-Freitas, Eliane

doi:10.1016/j.applanim.2011.10.003

Cited by 36 publications

(34 citation statements)

References 33 publications

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“…The study by Papaolias et al [29] suggested that exposure to atrazine can alter the final maturation of oocytes which is related to the reduction in egg production. Similar findings were also reported by Boscolo et al [30] and verified that this herbicide can reduce egg production in fish which attributed to the reduction in spawning events. They had also observed abnormalities in the lipid accumulation and atretic follicles in the exposed fish at an atrazine concentration of 0.5, 5.0, and 50 µg/L.…”

Section: Discussionsupporting

confidence: 90%

“…Diuron has also shown to be anti-androgenic, inducing vitellogenin in juvenile male tilapia (Oreochromis mossambica) [35] and anti-androgenic compounds (AAC) with key enzymatic activities [36]. Another effective herbicide called Atrazine also demonstrated the reduction in the reproduction of Japanese medaka (O. latipes) [29] and fathead minnow (Pimephales promales) [30]. Both studies showed no significant difference in the mean Gonado-Somatic Index (GSI) values.…”

Section: Discussionmentioning

confidence: 99%

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Herbicide Diuron as Endocrine Disrupting Chemicals (EDCs) through Histopathalogical Analysis in Gonads of Javanese Medaka (Oryzias javanicus, Bleeker 1854)

Kamarudin

Zulkifli

Azmai

et al. 2020

Animals

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The expeditious augmentation of the agriculture industry is leaving a significant negative impact on aquatic ecosystems. However, the awareness of the impacts of herbicide Diuron toxicities on the non-targeted aquatic organism, especially fish is still lacking. Javanese medaka, a new model fish species were exposed under sublethal levels and the long-term effects on gonads were investigated via histological studies. A total of 210 sexually mature fish were exposed to Diuron at seven different concentrations; control, solvent control, 1, 50, 100, 500, and 1000 μg/L for 21 days. In this study, Diuron caused histopathological alterations in gonads (ovary and testis) of Javanese medaka (Oryzias javanicus) by decreasing in gonadal staging and maturity of germ cells in oogenesis and spermatogenesis of female and male Javanese medaka. The results obtained in this study had proven our hypothesis that long-term exposure of herbicide Diuron can cause alterations in the gonadal histology of the adults of Javanese medaka.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Herbicide Diuron as Endocrine Disrupting Chemicals (EDCs) through Histopathalogical Analysis in Gonads of Javanese Medaka (Oryzias javanicus, Bleeker 1854)

Kamarudin

Zulkifli

Azmai

et al. 2020

Animals

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“…In fact, several biotic and abiotic factors affect the aggressive interaction and dominance hierarchy, for instance, the same-sized fish group (BOSCOLO et al 2011), the sex group composition (CARVALHO & GONÇALVES-DE-FREITAS 2011), the availability of shelters (KADRY & BARRETO 2010), the concentration of oxygen (SNEDDON & YERBURY 2004), and the water level (GONÇALVES-DE-FREITAS et al 2008). However, the effect of light intensity on the aggressive behavior was not sufficient to make the hierarchy unstable.…”

Section: Discussionmentioning

confidence: 99%

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

Carvalho¹,

Mendonça²,

Costa-Ferreira³

et al. 2013

Zoologia (Curitiba)

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“…One of those widespread practices is the selection of fish of similar size for commercial and livestock purposes (e.g., Slavík et al 2011). Although this is desirable for product standardization, the procedure of sorting animals by size causes handling stress (Ellis et al 2004) and, for some social fish species, can also increase aggressive interactions (Ang & Manica 2010;Boscolo et al 2011;Alonso et al 2012). Negative effects arise in this case because animals of similar size often have the same fighting ability.…”

mentioning

confidence: 99%

Homogeneously sized groups increase aggressive interaction and affect social stress in Thai strain Nile tilapia (Oreochromis niloticus)

Barreto

Boscolo

Gonçalves-de-Freitas

2015

Marine and Freshwater Behaviour and Physiology

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Social fish raised in farms are usually kept in groups of similar-sized individuals. However, social animals of similar size typically have similar fighting ability, which increases aggressive interaction for social rank establishment, as well as social stress. We compared Thai strain Nile tilapia fish, Oreochromis niloticus (L.), held under two treatments: (1) The Homogeneous one, with five adult male fish of similar size and (2) the Heterogeneous treatment with five adult males of different sizes. We recorded the frequency of aggressive interactions and checked social stability and stress levels (cortisol) after five days in the groups. Grouping similar sized Thai Nile tilapia increased the aggressive interactions and delayed rank stability with increased body injuries as a consequence. Homogeneous-sized individuals showed a similar level of stress while heterogeneous-sized individuals showed different stress levels with dominants being more stressed than subordinates. The data indicate that the practice of selecting fish of similar size in aquaculture management could reduce the welfare of social fish and that the effect is observed in different lineages.

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Same-sized fish groups increase aggressive interaction of sex-reversed males Nile tilapia GIFT strain

Cited by 36 publications

References 33 publications

Herbicide Diuron as Endocrine Disrupting Chemicals (EDCs) through Histopathalogical Analysis in Gonads of Javanese Medaka (Oryzias javanicus, Bleeker 1854)

Herbicide Diuron as Endocrine Disrupting Chemicals (EDCs) through Histopathalogical Analysis in Gonads of Javanese Medaka (Oryzias javanicus, Bleeker 1854)

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

Homogeneously sized groups increase aggressive interaction and affect social stress in Thai strain Nile tilapia (Oreochromis niloticus)

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