In vivo ecotoxicology models

Bidwell, Joseph R.

doi:10.1016/b978-0-12-813602-7.00036-3

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…But if these rhythms vary between individuals of the same species, we need to better understand this variation, since animal models and their biologically known characteristics are used in different fields, such as in ecotoxicology or medical research. For example, melatonin secretion has been used as a biomarker in ecotoxicology to study the effects of toxic chemicals and other biochemical compounds (Bidwell, 2020). Moreover, melatonin is important for the maintenance of human health (Arendt, 2006; Fishbein et al, 2021; Roenneberg and Merrow, 2016) and the dysregulation of melatonin secretion is involved in different human diseases (Karasek, 2004; Pacchierotti et al, 2001; Pandi-Perumal et al, 2017; Reiter et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Association between the magnitude of melatonin circadian rhythm and personality in the threespine stickleback

Philippe¹,

Aubin‐Horth²

2023

Preprint

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Melatonin secretion follows a circadian pattern with a maximum level at night in many species. However, in zebrafish (Danio rerio, a diurnal fish species) large inter-individual variations in daily rhythmicity of melatonin levels are present and are associated with variation in behaviour. Melatonin secretion rhythm of proactive individuals that are more active and exploratory are of larger amplitude compared to reactive individuals. In threespine sticklebacks (Gasterosteus aculeatus), a nocturnal species, inter-individual variability of behaviour is well described. However, inter-individual variation of melatonin rhythm and its association with variation in behaviour has never been measured in this species, which would allow to test if patterns found in zebrafish can be generalized for diurnal and nocturnal species. We measured large inter-individual variation in melatonin levels and found that activity was positively correlated with plasma melatonin concentration measured at night. We did not observe any significant difference in nigh-day variation in melatonin concentration between very active and less active groups. However, we found that individuals classified as reactive based on their propensity to wall-hugging, a measure of anxiety in fish, showed large variation in melatonin between night and day, while this rhythm was not seen in proactive individuals that frequently used the center of the aquarium.Overall, our study suggests that melatonin may directly modulate behaviour in wild sticklebacks, and that while interindividual variation in melatonin rhythm may be widespread in fish, but with different pattern of variation depending on the species.

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Section: Introductionmentioning

confidence: 99%

Association between the magnitude of melatonin circadian rhythm and personality in the threespine stickleback

Philippe¹,

Aubin‐Horth²

2023

Preprint

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Ecotoxicology Methods of Reservoir Water Using Fish

Sultan¹,

Pei²

2023

Reservoir Ecotoxicology

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Pachyrhizus toxicity: Genetic variability of mature and immature seeds and its effects on Sclerotium rolfsii and Ralstonia solanacearum

Thiago¹,

Randrea²,

Anne³

et al. 2023

J. Med. Plants Res.

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Pachyrhizus seeds-induced toxicity is very well-known to have developed in humans, fishes, insects, and some micro-organisms. Yet, there is a paucity of studies addressing it in their germplasm, as well as its effects on some phytopathogens. This work aimed to assess the Pachyrhizus genetic variability on toxicity and to determine Pachyrhizus extract toxicity on Sclerotium rolfsii and Ralstonia solanacearum in vitro. In the findings, it was shown to only have toxicity genetic diversity in immature seeds. Its toxicity in mature seeds was very high and its genetic variability was not detected. There was a toxic effect on S. rolfsii and R. solanacearum. In S. rolfsii it was determined that the most toxic dose was 1: 1000 with P40 genotype. It decreased the mycelial growth by 72% following 5 days. In R. solanacearum it was determined that the most toxic dose was 1:200 with P40 genotype. It reduced bacterial multiplication by 57% between 24 and 48 h.

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In vivo ecotoxicology models

Cited by 3 publications

References 32 publications

Association between the magnitude of melatonin circadian rhythm and personality in the threespine stickleback

Association between the magnitude of melatonin circadian rhythm and personality in the threespine stickleback

Ecotoxicology Methods of Reservoir Water Using Fish

Pachyrhizus toxicity: Genetic variability of mature and immature seeds and its effects on Sclerotium rolfsii and Ralstonia solanacearum

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