Chemical cues affecting recruitment and juvenile habitat selection in marine versus freshwater systems

Bilodeau, Stephanie M.; Hay, Mark E.

doi:10.1007/s10452-021-09905-x

Cited by 8 publications

(7 citation statements)

References 201 publications

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“…Intraspecific, interspecific and habitat-mediated animal responses to chemical cues play key roles in aquatic environments in structuring populations and communities [1][2][3][4]. Chemical signals mediate species' behaviour across planktonic and benthic life stages [1,5,6]. Larval settlement and juvenile development habitats are often quite different and separate from adult habitats, and there can be considerable spatial distances between them [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…This hypothesis posits that juvenile populations can build up in nursery habitats in the reef infrastructure over recruitment years depending on prey availability and competition from adults [15,16]. While the sensory biology and chemical ecology of invertebrate larval settlement are well studied [1,6], the (26°C; 12 : 12 h light cycle) in UV sterilized 1 µm FSW with ambient salinity of approximately 34‰ (Merck salinity probe) and fed small fronds of Amphiroa sp. Juveniles, up to 3 mm diameter, were placed in 12-well dishes (5 ml wells).…”

Section: Introductionmentioning

confidence: 99%

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Chemosensory behaviour of juvenile crown-of-thorns sea star ( Acanthaster sp.), attraction to algal and coral food and avoidance of adult conspecifics

Webb,

Clements,

Selvakumaraswamy

et al. 2024

Proc. R. Soc. B.

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Intraspecific and habitat-mediated responses to chemical cues play key roles in structuring populations of marine species. We investigated the behaviour of herbivorous-stage juvenile crown-of-thorns sea stars (COTS; Acanthaster sp.) in flow-through choice chambers to determine if chemical cues from their habitat influence movement and their transition to become coral predators. Juveniles at the diet transition stage were exposed to cues from their nursery habitat (coral rubble-crustose coralline algae (CCA)), live coral and adult COTS to determine if waterborne cues influence movement. In response to CCA and coral as sole cues, juveniles moved towards the cue source and when these cues were presented in combination, they exhibited a preference for coral. Juveniles moved away from adult COTS cues. Exposure to food cues (coral, CCA) in the presence of adult cues resulted in variable responses. Our results suggest a feedback mechanism whereby juvenile behaviour is mediated by adult chemical cues. Cues from the adult population may deter juveniles from the switch to corallivory. As outbreaks wane, juveniles released from competition may serve as a proximate source of outbreaks, supporting the juveniles-in-waiting hypothesis. The accumulation of juveniles within the reef infrastructure is an underappreciated potential source of COTS outbreaks that devastate coral reefs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemosensory behaviour of juvenile crown-of-thorns sea star ( Acanthaster sp.), attraction to algal and coral food and avoidance of adult conspecifics

Webb,

Clements,

Selvakumaraswamy

et al. 2024

Proc. R. Soc. B.

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“…Previous studies suggest that neurosensory cues strongly influence fish behavior, interspecific interactions, and even habitat selection (Nagelkerken et al, 2019). This is especially true of olfactory and auditory cues that are used by larval fishes for orientation as well as locating and settling on quality nondegraded habitat (Kaplan and Mooney, 2016;Gordon et al, 2018;Bilodeau and Hay, 2022;Hu et al, 2022). Furthermore, sound can play a critical role in predator-prey interactions, territorial defense, and reproductive behavior (Looby et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Dysregulation of microRNAs may contribute to neurosensory impairment in Arctic cod (Boreogadus saida) following CO2 exposure

Schweitzer,

Bonin,

Magel

et al. 2023

Front. Mar. Sci.

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MicroRNAs (miRNAs) are epigenetic markers with a key role in post-transcriptional gene regulation. Several studies have described the dysregulation of miRNAs in temperature and hypoxic stress responses of marine organisms, but their role in the response to acidification conditions has remained relatively underexplored. We investigated the differential expression of miRNAs in whole brain tissue of Arctic cod (Boregogadus saida) exposed to elevated aqueous CO2 levels representative of future climate change predictions. We detected the expression of 17 miRNAs of interest that are either directly or indirectly associated with reduced auditory performance; 12 of the 17 miRNAs showed significant differential expression in high treatment vs. low (control) aqueous CO2 conditions. Target gene predictions indicated that these miRNAs are likely involved with inner ear maintenance, hair cell degradation, age-related hearing loss, neural inflammation, and injury. The highest differential expression was observed in mir-135b, which is linked with increased neural inflammation and injury that may be associated with neurosensory dysfunction. Collectively, these results elucidate the contributions of miRNA mechanisms underlying CO2-induced sensory deficits in fishes facing abiotic environmental change and suggest strong potential for this approach to yield novel insights into the mechanistic effects of climate change on marine organisms.

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“…Drastic transitions from planktonic to benthic phases are very common in marine invertebrates, planktonic larvae of which drift to suitable adult habitats nearby for settlement (Pawlik, 1992;Hodin et al, 2018;Bilodeau and Hay, 2021). Planktonic larvae sense a wide array of physico-chemical and biological factors, such as settlement pheromones, to find suitable settlement sites (Pawlik, 1992;Hodin et al, 2018;Bilodeau and Hay, 2021). These govern the structure and function of benthic communities.…”

Section: Introductionmentioning

confidence: 99%

Faint chemical traces of conspecifics delay settlement of barnacle larvae

Kitade

Endo²,

Nogata³

et al. 2022

Front. Mar. Sci.

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Larval settlement drives population and community dynamics and evolution of marine invertebrates. While it is well known that larvae sense a variety of biological and environmental factors, there is limited information on how they react to specific factors so as to locate settlement sites. Proteinaceous Waterborne Settlement Pheromone (WSP) was purified from adult barnacles, Amphibalanus amphitrite, in a previous study, but it is unclear how WSP guides barnacle cyprids to the source. Here, a series of settlement assays were conducted to investigate the concentration dependence of recombinant WSP. We report that low concentrations of barnacle WSP decrease the probability of settlement of conspecific cyprids, whereas high concentrations have the opposite effect. We suggest that this is because weak WSP informs cyprids that suitable settlement sites with adult barnacles are distant, inducing them to extend the larval phase. The present study clearly shows that larvae use WSP concentration, rather than presence/absence information. In barnacles, several other conspecific chemical/visual cues also attract larvae. This study opens the door to future research to determine how these cues influence larval behavior in nature.

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Chemical cues affecting recruitment and juvenile habitat selection in marine versus freshwater systems

Cited by 8 publications

References 201 publications

Chemosensory behaviour of juvenile crown-of-thorns sea star ( Acanthaster sp.), attraction to algal and coral food and avoidance of adult conspecifics

Chemosensory behaviour of juvenile crown-of-thorns sea star ( Acanthaster sp.), attraction to algal and coral food and avoidance of adult conspecifics

Dysregulation of microRNAs may contribute to neurosensory impairment in Arctic cod (Boreogadus saida) following CO2 exposure

Faint chemical traces of conspecifics delay settlement of barnacle larvae

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