Responses to Multiple Chemical Cues by the Crayfish Orconectes Virilis

Hazlett, Brian A.

doi:10.1163/156853999501261

Cited by 87 publications

(79 citation statements)

References 19 publications

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“…Nest occupancy is short, usually less than 4 d within a single nest, and amphipods exhibit high mobility within a single sporophyll (Cerda et al 2010). Secondly, like many crustaceans, amphipods may use chemical cues to detect and escape from predators (Hazlett 1999). We observed losses of amphipods of close to 50% when predators were present in our experimental mesocosm but unable to access their prey.…”

Section: Discussionmentioning

confidence: 60%

Density- and trait-mediated effects of fish predators on amphipod grazers: potential indirect benefits for the giant kelp Macrocystis pyrifera

Pérez‐Matus¹,

Shima²

2010

Mar. Ecol. Prog. Ser.

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Indirect effects of predators on primary producers may arise when predators suppress herbivore abundance and/or alter the behaviour patterns of herbivores in ways that reduce grazing pressure. Most studies highlight the role of predators in reducing herbivore abundance (i.e. densitymediated interactions), while behavioural effects (i.e. trait-mediated interactions) induced by predators are less commonly considered and are often assumed to be of secondary importance. We used a mesocosm experiment to evaluate the consumptive and behavioural effects of 2 species of predatory fishes on amphipod grazers that feed and nest on the giant kelp Macrocystis pyrifera. Only one, Notolabrus celidotus, of the 2 predator species reduced grazer abundance. Although the second predator species, N. fucicola, did not affect grazer abundance directly, it significantly reduced the grazing efficiency of amphipods on blades of M. pyrifera. Our study illustrates how density-and trait-mediated interactions reduce grazer efficiency and provide potential indirect benefits to primary producers. To our knowledge, this is the first experimental evidence of a potential trophic cascade in kelp beds generated by consumptive and nonconsumptive effects. When considered alongside results of other studies that highlight positive effects of macroalgae on reef fish demographic rates, our results provide compelling evidence that mutualistic relationships may exist between kelp and associated predatory fishes.

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Section: Discussionmentioning

confidence: 60%

Density- and trait-mediated effects of fish predators on amphipod grazers: potential indirect benefits for the giant kelp Macrocystis pyrifera

Pérez‐Matus¹,

Shima²

2010

Mar. Ecol. Prog. Ser.

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“…The first is that sex pheromones attract relatively fewer crayfish than food. Indeed, confinement in traps might cause stress on the senders with the consequent reduced emission of pheromones (Hazlett 1999). Purification and concentration of the molecules involved in sexual communication will certainly improve the efficacy of the method but, as said above, the chemical nature of sex pheromones in crayfish is still unknown.…”

Section: Autocidal Methodsmentioning

confidence: 99%

Managing invasive crayfish: is there a hope?

et al. 2011

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“…Prey display a range of responses to predator odours and diet cues, which include alterations in behaviour, morphology, physiology and life histories (Bronmark and Miner, 1992;Chivers and Mirza, 2001;Dawidowicz and Loose, 1992;Fonner and Woodley, 2015;Gazzola et al, 2015;Hazlett, 1999). The expression of these various responses is sensitive to the time scales over which they might be beneficial in relation to the costs of induction and maintenance (Ferrari et al, 2009;Relyea, 2002;Steiner and Van Buskirk, 2009).…”

Section: Effects Of Predator Odours and Diet Cues On Prey Ecologymentioning

confidence: 99%

Mechanisms underlying the control of responses to predator odours in aquatic prey

Mitchell

Bairos‐Novak

Ferrari

2017

Journal of Experimental Biology

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In aquatic systems, chemical cues are a major source of information through which animals are able to assess the current state of their environment to gain information about local predation risk. Prey use chemicals released by predators (including cues from a predator's diet) and other prey (such as alarm cues and disturbance cues) to mediate a range of behavioural, morphological and life-history antipredator defences. Despite the wealth of knowledge on the ecology of antipredator defences, we know surprisingly little about the physiological mechanisms that control the expression of these defensive traits. Here, we summarise the current literature on the mechanisms known to specifically mediate responses to predator odours, including dietary cues. Interestingly, these studies suggest that independent pathways may control predator-specific responses, highlighting the need for greater focus on predator-derived cues when looking at the mechanistic control of responses. Thus, we urge researchers to tease apart the effects of predator-specific cues (i.e. chemicals representing a predator's identity) from those of dietmediated cues (i.e. chemicals released from a predator's diet), which are known to mediate different ecological endpoints. Finally, we suggest some key areas of research that would greatly benefit from a more mechanistic approach.

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Responses to Multiple Chemical Cues by the Crayfish Orconectes Virilis

Cited by 87 publications

References 19 publications

Density- and trait-mediated effects of fish predators on amphipod grazers: potential indirect benefits for the giant kelp Macrocystis pyrifera

Density- and trait-mediated effects of fish predators on amphipod grazers: potential indirect benefits for the giant kelp Macrocystis pyrifera

Managing invasive crayfish: is there a hope?

Mechanisms underlying the control of responses to predator odours in aquatic prey

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