Do bacteria, not fish, produce ‘fish kairomone’?

Ringelberg, J.; Gool, Erik van

doi:10.1093/plankt/20.9.1847

Cited by 52 publications

(43 citation statements)

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“…On the other hand, the structure of the planktonic bacterial community might have been altered such that the summer inoculum might have lower kairomone biodegradation activity. Moreover, the higher abundance of fish (regardless of their family, such as planktivores or piscivores) along with fish mucus-dwelling bacteria in summer might account for (1) higher fish excretion rates, products of which could act in synergy with the kairomone , and (2) greater production of kairomone (Ringelberg and van Gool 1998). These might both account for the rapid migration of the daphnids in the IF treatment and hinder the efficient degradation of the kairomone by the planktonic bacteria (Ringelberg and van Gool 1998;Beklioglu et al 2006a, b).…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, it is also suggested that fish and fish mucus-dwelling bacteria both take role during the release of the kairomone (Ringelberg and van Gool 1998;Beklioglu et al 2006b). Hence, it could be suggested that a fish metabolite is to some extent activated by mucus-dwelling bacteria-perhaps by hydrolyzing saccharidic cue molecules in to fish mucus breakdown products (Rittschof and Cohen 2004)-and then becomes a robust kairomone able to induce full-strength adaptive response (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Water-soluble kairomone loses its activity under non-sterile conditions at 37°C due to microbial degradation (Loose et al 1993) and its activity is impaired in the face of planktonic bacterial processes (Beklioglu et al 2006a). Moreover, the origin of the kairomone could be bacteria associated with fish (Ringelberg and van Gool 1998) and fish and fish mucus-dwelling bacteria probably act together in the release of the kairomone (Beklioglu et al 2006b). This suggestion, which is not only valid for kairomones in freshwater, was also proposed for another crustacean-fish system in a salt water ecosystem: It was suggested that enzymes originating from fish mucus-associated bacteria may activate the production of breakdown products of the polysaccharides in fish external mucus, which ultimately function as fish kairomone (Forward and Rittschof 1999).…”

Section: Introductionmentioning

confidence: 99%

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Molecular approach to the chemical characterization of fish-exuded kairomone: a Fourier transform infrared spectroscopic study

et al. 2009

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Diel vertical migration (DVM) bioassay-guided Fourier transform infrared spectroscopy can be a prominent non-destructive and innovative approach for ecological studies. During the characterization of the nature of the fish-exuded kairomone, the peak area results from the spectroscopic analysis of the control, fish-conditioned (F) and temperature incubated fish-conditioned (IF) treatments of the DVM bioassays demonstrated that there was a strong correlation between the alterations of the amine N-H, amide II, amide IV and CH 3 asymmetric vibrations, suggesting that both N-H and CH 3 molecules may be main components of the fish-exuded kairomone cocktail. The IF treatment, which showed similar results with the control treatment, supported that the kairomone is inactivated by bacterial biodegradation. The seasonal variations in the peak areas of the N-H and CH 3 bands suggested that DVM response varied seasonally, where migration response developed quickly in warmer seasons. The peak area of the amine N-H band of the F and IF treatments relative to control conditions can be used as an ideal indicator of the absence or presence and the promptness of migration, at all seasons.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Molecular approach to the chemical characterization of fish-exuded kairomone: a Fourier transform infrared spectroscopic study

et al. 2009

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“…How predator cues are released into the environment and the exact nature of predator cues are unclear. Potential sources of cues may be prey conspecifics, predators, or bacteria associated with these organisms [18], and may be released from body surfaces, injured tissues, or feces [19]. Variation in prey responses to cues from different predators suggests that predator species are likely to excrete different cues [15].…”

Section: Introductionmentioning

confidence: 99%

Effects of predator cues on pesticide toxicity: Toward an understanding of the mechanism of the interaction

Qin

Presley

Anderson

et al. 2011

Enviro Toxic and Chemistry

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Pesticide toxicity may be modified by a number of co-occurring environmental and ecological stressors. Coexposure to predator cues has been shown to potentiate and/or synergize toxicity of pesticides. However, the mechanisms behind these interactions are not well understood. Here we examine the effects of fish predator (bluegill, Lepomis macrochirus) cues on toxicity of five different pesticides to the freshwater cladoceran, Ceriodaphnia dubia. The purpose for examining patterns among pesticides was to test the idea that the mechanism of the interaction could be explained by a general stress response; that is, the interaction patterns would be similar regardless of the pesticide's mechanism of action [MOA]). Acute 96-h concentration-response experiments were conducted for pesticides with and without fish cues. Predator cues influenced the toxicity of pesticides and the interaction patterns varied among pesticides. Fipronil exhibited a synergistic interaction, while predator cues interacted antagonistically for bifenthrin and thiacloprid. Other compounds previously reported to potentiate toxicity (malathion) were found to act additively. The results demonstrate that factors such as pesticide bioavailability, K(OC) , and exposure concentration may be important for predicting the occurrence of these interactions and that patterns were not consistent among pesticides varying in MOA. Predator stress is an important component for structuring communities and ecosystem processes. Fully understanding how this process may interact with organic contaminants may best be achieved by examination at toxicokinetic and toxicodynamic scales.

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“…This is most likely due to the volatile nature of semiochemicals (Fink, 2007). Alternatively, it has also been suggested that fish kairomones may be a product of fish-associated bacteria (Ringelberg and Van Gool, 1998). Thus, the active compounds affecting the larvae could also be a protein or another organic compound that is inactivated at high temperatures.…”

Section: Discussionmentioning

confidence: 99%