Effects of predation risk on survival, behaviour and morphological traits of small juveniles of Concholepas concholepas (loco)

Manríquez, Patricio H.; Jara, María Elisa; Opitz, Tania; Castilla, Juan Carlos; Lagos, Nelson A.

doi:10.3354/meps10055

Cited by 13 publications

(11 citation statements)

References 48 publications

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“…Similarly, chemically mediated behavioural responses in terrestrial and marine gastropods indicate that they can discriminate between environmental odours originating from several different sources such as food, damaged conspecifics, and predators [25], [37]. Under laboratory conditions C. concholepas responded negatively to the odours of predatory crabs and starfish, avoiding crawling displacement in the direction of the odour source [38]. Moreover, small juveniles of C. concholepas are also able to achieve cryptic shell colouration and avoid lethal attacks by crabs [39].…”

Section: Introductionmentioning

confidence: 99%

Ocean Acidification Disrupts Prey Responses to Predator Cues but Not Net Prey Shell Growth in Concholepas concholepas (loco)

et al. 2013

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BackgroundMost research on Ocean Acidification (OA) has largely focused on the process of calcification and the physiological trade-offs employed by calcifying organisms to support the building of calcium carbonate structures. However, there is growing evidence that OA can also impact upon other key biological processes such as survival, growth and behaviour. On wave-swept rocky shores the ability of gastropods to self-right after dislodgement, and rapidly return to normal orientation, reduces the risk of predation.Methodology/Principal FindingsThe impacts of OA on this self-righting behaviour and other important parameters such as growth, survival, shell dissolution and shell deposition in Concholepas concholepas (loco) were investigated under contrasting pCO2 levels. Although no impacts of OA on either growth or net shell calcification were found, the results did show that OA can significantly affect self-righting behaviour during the early ontogeny of this species with significantly faster righting times recorded for individuals of C. concholepas reared under increased average pCO2 concentrations (± SE) (716±12 and 1036±14 µatm CO2) compared to those reared at concentrations equivalent to those presently found in the surface ocean (388±8 µatm CO2). When loco were also exposed to the predatory crab Acanthocyclus hassleri, righting times were again increased by exposure to elevated CO2, although self-righting times were generally twice as fast as those observed in the absence of the crab.Conclusions and SignificanceThese results suggest that self-righting in the early ontogeny of C. concholepas will be positively affected by pCO2 levels expected by the end of the 21st century and beginning of the next one. However, as the rate of self-righting is an adaptive trait evolved to reduce lethal predatory attacks, our result also suggest that OA may disrupt prey responses to predators in nature.

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Section: Introductionmentioning

confidence: 99%

Ocean Acidification Disrupts Prey Responses to Predator Cues but Not Net Prey Shell Growth in Concholepas concholepas (loco)

et al. 2013

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“…Equally, however, predator avoidance by benthic marine invertebrates has been shown in laboratory studies such as those using Y-maze experiments (e.g. Manríquez et al, 2013). Although predator avoidance (suggested by settlement at New Stairs) and predator swamping (suggested at Castle Rock) appear mutually exclusive, they may reflect localized differences in the timing of larval responses or in the density of settling larvae.…”

Section: Effects Of Predator Presencementioning

confidence: 94%

“…use of spatial refuges), delayed metamorphosis, or synchronised settlement to 'swamp' predators (e.g. Boudreau et al, 1993;Grosberg, 1981;Johnson and Strathmann, 1989;Manríquez et al, 2013;Metaxas and Burdett-Coutts, 2006;Vail and McCormick, 2011;Welch et al, 1997;Young and Chia, 1981).…”

Section: Introductionmentioning

confidence: 99%

“…Avoidance responses to the threat of predation have been exhibited by larvae and juveniles of several invertebrate taxa in laboratory (Boudreau et al, 1993;Manríquez et al, 2013;Metaxas and Burdett-Coutts, 2006;Welch et al, 1997) and field experiments (e.g. Johnson and Strathmann, 1989;Welch et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Larval responses to cues are expected to be particularly important in the case of sessile or sedentary species, for which settlement affords a brief window of selectivity, resulting in the potential for substantial selective pressure (Manríquez et al, 2013;Rittschof et al, 1998;Webster, 2002). While it is known that settling larvae and juveniles of many taxa respond to positive and/or negative waterborne cues from sources such as conspecifics, bacterial communities, algae and other extracts (Dobretsov, 1999;Keough and Raimondi, 1995;Soares et al, 2008;Zhao and Qian, 2002), less is understood of the role that the threat of predation and competition plays in this context.…”

Section: Introductionmentioning

confidence: 99%

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Effects of predation risk on survival, behaviour and morphological traits of small juveniles of Concholepas concholepas (loco)

Cited by 13 publications

References 48 publications

Ocean Acidification Disrupts Prey Responses to Predator Cues but Not Net Prey Shell Growth in Concholepas concholepas (loco)

Ocean Acidification Disrupts Prey Responses to Predator Cues but Not Net Prey Shell Growth in Concholepas concholepas (loco)

Do the threats of predation and competition alter larval behaviour and selectivity at settlement under field conditions?

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

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