Behavioural responses of fish groups exposed to a predatory threat under elevated CO2

Cattano, Carlo; Fine, Maoz; Quattrocchi, Federico; Holzman, Roi; Milazzo, Marco

doi:10.1016/j.marenvres.2019.04.011

Cited by 12 publications

(8 citation statements)

References 61 publications

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“…On receiving cue(s) from a predator, shoal cohesion, polarization and velocity increased. Our results on increased cohesion on exposure to predator cue(s) are in consensus with studies on different fish species (Herbert-Read et al 2017;Meuthen et al 2016;Cattano et al 2019). In recent studies, shoal cohesion in wild zebrafish have been found to be population dependent (Suriyampola et al 2016;Bhat et al, 2015) and thus, we speculate that in natural habitats, populations with greater predation pressure (than what was presented in the current study) might have even lower inter-individual distances.…”

Section: Discussionsupporting

confidence: 92%

Use of multimodal sensory cues in predator avoidance by wild-caught zebrafish shoals

Mukherjee

Malakar

Das

et al. 2023

Preprint

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Shoaling in fishes is regulated by factors like predation, vegetation cover, water flow and food availability. Shoals detect and respond to changes in these ecological factors using a multimodal sensory system. Here, we examine the immediate response of wild-caught zebrafish (Danio rerio)shoals to cues from its natural predator, the snakehead (Channa sp.). Zebrafish shoals were recorded upon exposure to (1) olfactory predator cues, (2) visual predator cues, (3) both cues together, and (4) no cue. We tracked individuals and analysed shoal responses across these treatments. We found that compared to control treatments, shoals receiving either visual or olfactory cues had significantly greater: (i) cohesion, (ii) polarization and (iii) velocity. Interestingly, when the shoals received both cues simultaneously, the cohesion, polarization and velocity decreased and a significantly greater number of individual freezing events occurred. Therefore, zebrafish relied on both visual and olfactory cues to escape predation. However, when shoals were presented with both cues together, while freezing frequency increased, other responses were comparable to control treatments where no predator cue was provided. While this study indicates that multimodal cues elicit a different anti-predator response than the cues singly, more experiments are required to identify the underlying cause of this behaviour.

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Section: Discussionsupporting

confidence: 92%

Use of multimodal sensory cues in predator avoidance by wild-caught zebrafish shoals

Mukherjee

Malakar

Das

et al. 2023

Preprint

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“…Ferrari et al (2011) reported considerable variation in the sensitivity of damselfish to elevated CO 2 , with some species much more sensitive than others. More recently, a high resistance to OA (Kwan et al, 2017), as well as an improved aerobic performance (Rummer et al, 2013) and an unaffected gregarious behavior (group cohesion) were highlighted in damselfish under high pCO 2 levels (Cattano et al, 2019).…”

Section: U N C O R R E C T E D P R O O Fmentioning

confidence: 99%

Fish assemblages cope with ocean acidification in a shallow volcanic CO2 vent benefiting from an adjacent recovery area

Mirasole

Signa

Gianguzza

et al. 2020

Marine Environmental Research

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Shallow CO 2 vents are used to test ecological hypotheses about the effects of ocean acidification (OA). Here, we studied fish assemblages associated with Cymodocea nodosa meadows exposed to high pCO 2 /low pH conditions at a natural CO 2 vent in the Mediterranean Sea. Using underwater visual census, we assessed fish community structure and biodiversity in a low pH site (close to the CO 2 vent), a close control site and a far control site, hypothesising a decline in biodiversity and a homogenization of fish assemblages under OA conditions. Our findings revealed that fish diversity did not show a unique spatial pattern, or even significant relationships with pH, but correlated with seagrass leaf canopy. Among-site similarity was found in the abundance of juveniles, contrary to the expected impacts of OA on early life stages. However, pH seems an important driver in structuring fish assemblage in the low pH site, despite its high similarity with the close control site. This unexpected pattern may represent a combined response of fish mobility, enhanced food resources in the acidified site, and a 'recovery area' effect of the adjacent control site.

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“…We are starting to understand the olfactory biology in this endangered fish. In the Anthropocene, a changing environment has been shown to deleteriously impact fish that rely on olfaction for many aspects of their life history (Tierney et al 2010 ; Cattano et al 2019 ). Thus, studies on basic morphology will inform and give context to research on the pathological effects of contaminant exposure and broadens our understanding of the olfactory biology of this endangered fish.…”

Section: Discussionmentioning

confidence: 99%

Gross morphology, histology, and ultrastructure of the olfactory rosette of a critically endangered indicator species, the Delta Smelt, Hypomesus transpacificus

2021

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The Delta Smelt (Hypomesus transpacificus) is a small, semi-anadromous fish native to the San Francisco Bay-Delta Estuary and has been declared as critically endangered. Their olfactory biology, in particular, is poorly understood and a basic description of their sensory anatomy is needed to advance our understanding of the sensory ecology of species to inform conservation efforts to manage and protect them. We provide a description of the gross morphology, histological, immunohistochemical, and ultrastructural features of the olfactory rosette in this fish and discuss some of the functional implications in relation to olfactory ability. We show that Delta Smelt have a multilamellar olfactory rosette with allometric growth. Calretinin immunohistochemistry revealed a diffuse distribution of olfactory receptor neurons within the epithelium. Ciliated, microvillous and crypt neurons were clearly identified using morphological and immunohistochemical features. The olfactory neurons were supported by robust ciliated and secretory sustentacular cells. Although the sense of smell has been overlooked in Delta Smelt, we conclude that the olfactory epithelium has many characteristics of macrosmatic fish. With this study, we provide a foundation for future research into the sensory ecology of this imperiled fish.

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Behavioural responses of fish groups exposed to a predatory threat under elevated CO2

Cited by 12 publications

References 61 publications

Use of multimodal sensory cues in predator avoidance by wild-caught zebrafish shoals

Use of multimodal sensory cues in predator avoidance by wild-caught zebrafish shoals

Fish assemblages cope with ocean acidification in a shallow volcanic CO2 vent benefiting from an adjacent recovery area

Gross morphology, histology, and ultrastructure of the olfactory rosette of a critically endangered indicator species, the Delta Smelt, Hypomesus transpacificus

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