Cadmium-induced disruption of environmental exploration and chemical communication in matrinxã, Brycon amazonicus

Honda, R.

doi:10.1016/j.aquatox.2008.07.001

Cited by 19 publications

(10 citation statements)

References 11 publications

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“…In Gymnotiformes, there are reports of the presence of alarm cells, but without direct evidence of alarm substances (e.g., Smith, 1992;Wisenden & Barbour, 2005). In Characiformes, which features the largest number of species assessed in this context, alarm responses to alarm cells substances have been reported, for example, in Brycon amazonicus (Honda et al, 2008); Brycon cephalus (Ide et al, 2003); Gymnocharacinus bergi (Cordi et al, 2005); Leporinus macrocephalus (Alves et al, 2013); Leporinus piau ; Mimagoniates lateralis and M. microlepis (Duboc, 2007), and Piaractus mesopotamicus (Jordão & Volpato, 2000). In the Siluriformes, the second order most studied in this context, six species have been evaluated: Arius felis (e.g., Smith 2000), Clarias gariepinus (e.g., Guerra et al, 2006;van de Nieuwegiessen et al, 2008;van de Nieuwegiessen et al, 2009), Ictalurus punctatus (e.g., Chapman & Johnson, 1997;Valentic & Caprio, 1994), Pimelodella lateristriga (e.g., Damasceno et al, 2012), Pseudoplatystoma corruscans (e.g., Giaquinto & Volpato, 2001).…”

Section: Discussionmentioning

confidence: 99%

“…Fresh epithelial alarm cue was obtained using adult jundiá specimens (length: 30-35 cm, weight: 85-91.2 g), as previously described in Ide et al (2003) and Honda et al (2008). Briefly, animals were sacrificed through spinal section, skin patches from both dorsal sides of the body were gently removed using a scalpel (20g total skin weight, ~30 cm 2 ), were homogenized in 200 mL of deionized water and filtered in common filter paper yielding a skin homogenate considered as the 10% (w/v) stock solution.…”

Section: Methodsmentioning

confidence: 99%

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Skin extract from Rhamdia quelen(Siluriformes: Heptapteridae) does not promote stress in conspecifics

Souza‐Bastos

Freire

Fernandes-de-Castilho

2014

Neotrop. ichthyol.

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Chemical communication is widely used in aquatic environments, where visual or auditory signals may not be always effective. Fish of the superorder Ostariophysi are known to display epidermal cells (club cells) that produce and store alarm substances, which are released to the water when the skin is damaged. Responses to alarm substances range widely, between active searches for refuge to a complete stop in any locomotor activity. In this study a large number of binucleated club cells (average density of 11 cells /µm 2 ) were histologically observed in the skin of the catfish Rhamdia quelen (known as jundiá). Skin extract (2, 5, and 10% w/v) applied for 15 minutes to conspecifics elicited increase in swimming activity and in the area visited by the fish inside the tank. However, exposure to the epithelial alarm cue did not evoke any stress response: plasma osmolality, ions (sodium, chloride, magnesium, and potassium), glucose and cortisol remained unchanged. In conclusion, the conspecific alarm cue of the jundiá induces behavioral responses but not an acute stress response upon short-term exposure, compatible with its role in fostering physical integrity without representing major stress activation. Considering that in the natural environment such stimuli must quickly disappear due to dilution and that rapid protection responses may be necessary upon the possibility of an approaching predator, a faster mechanism to assure survival may come into play, such as sympathetic nervous system activation.Comunicação química é amplamente utilizada por animais que vivem em ambiente aquático, onde sinais visuais e auditivos nem sempre são facilmente identificados. Os Ostariophysi são conhecidos por apresentarem células club na epiderme, as quais produzem e estocam substância de alarme que são liberadas para o ambiente quando a pele é lesionada. As respostas dos peixes a substância de alarme variam entre exploração ativa por refúgios até a parada completa de atividade locomotora. Neste estudo, grande número de células club binucleadas (densidade média de 11 células/µm2) foram histologicamente observadas na epiderme do jundiá, Rhamdia quelen. Peixes expostos a extrato de pele de conspecíficos (2, 5, e 10% peso/vol) por 15 minutos apresentaram aumento da atividade locomotora e da área de dispersão. No entanto, essa exposição não promoveu nenhuma resposta de estresse -osmolalidade plasmática, íons (sódio, cloreto, magnésio e potássio), glicose e cortisol não sofreram alteração. Concluímos que a exposição aguda a extrato de pele de conspecíficos promovem respostas comportamentais de fuga, que essa espécie apresenta grande concentração de células club, as quais devem estar envolvidas nessas respostas e que a exposição aguda ao estímulo não promoveu respostas bioquímicas indicativas de estresse. Considerando que no ambiente natural tais estímulos devem desaparecer rapidamente dados a diluição do meio e que respostas rápidas de proteção devem ser desencadeadas frente à possibilidade de presença de predador, vias rápidas de suporte ...

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Skin extract from Rhamdia quelen(Siluriformes: Heptapteridae) does not promote stress in conspecifics

Souza‐Bastos

Freire

Fernandes-de-Castilho

2014

Neotrop. ichthyol.

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“…Heavy metal pollutants for which these effects have been shown include Cu (Carreau and Pyle 2005;Pyle and Mirza 2007), Cd (Honda et al 2008;Kusch et al 2008), and Hg (Smith and Weiss 1997). Some studies have taken these investigations into the field to show that fish in metal-contaminated lakes respond differently from fish in uncontaminated lakes.…”

Section: Heavy Metals In Aquatic Communitiesmentioning

confidence: 96%

Heavy Metal Pollutants and Chemical Ecology: Exploring New Frontiers

2010

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Heavy metals are an important class of pollutants with both lethal and sublethal effects on organisms. The latter are receiving increased attention, as these may have harmful ecological outcomes. For example, recent explorations of heavy metals in freshwater habitats reveal that they can modify chemical communication between individuals, resulting in "info-disruption" that can impact ecological relationships within and between species. Info-disruption can affect animal behavior and social structure, which in turn can modify both intraspecies and interspecies interactions. In terrestrial habitats, info-disruption by metals is not well studied, but recent demonstrations of chemical signaling between plants via both roots and volatile organic molecules provide potential opportunities for info-disruption. Metals in terrestrial habitats also can form elemental plant defenses, in which they can defend a plant against natural enemies. For example, hyperaccumulation of metals by terrestrial plants has been shown to provide defensive benefits, although in almost all known cases the metals are not anthropogenic pollutants but are naturally present in soils inhabited by these plants. Info-disruption among microbes is another arena in which metal pollutants may have ecological effects, as recent discoveries regarding quorum sensing in bacteria provide an avenue for metals to affect interactions among bacteria or between bacteria and other organisms. Metal pollutants also may influence immune responses of organisms, and thus affect pathogen/host relationships. Immunomodulation (modification of immune system function) has been tied to some metal pollutants, although specific metals may boost or reduce immune system function depending on dose. Finally, the study of metal pollutants is complicated by their frequent occurrence as mixtures, either with other metals or with organic pollutants. Most studies of metal pollutants focus on single metals and therefore oversimplify complex field conditions. Study of pollutant impacts on chemical ecology also are difficult due to the necessity of studying effects at varying ecological scales: "dynamic scaling" of chemical ecology studies is rarely done completely. It is clear that much remains to be learned about how heavy metal pollution impacts organisms, and that exciting new research frontiers are available for experimental exploration.

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“…Contaminants known to be at problematic levels in the Harbour (''A list'' contaminants) are polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and metals including arsenic, cadmium, lead, iron, mercury and zinc, and the Harbour is also the recipient of discharges from four urban wastewater treatment plants (Hamilton Harbour Remedial Action Plan (RAP) 2003). PAHs (Goncalves et al 2008;Gravato and Guilhermino 2009), PCBs (Nakayama et al 2005;Schmidt et al 2005), mercury (Zhou and Weis 1998), cadmium (Honda et al 2008), as well as complex combinations of contaminants (Triebskorn et al 1997;Breckels and Neff 2010) can all affect locomotion.…”

Section: Introductionmentioning

confidence: 98%

Behavior as biomarker? Laboratory versus field movement in round goby (Neogobius melanostomus) from highly contaminated habitats

et al. 2012

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Changes in animal movement (frequency or speed of locomotion) following exposure to a toxicant are frequently considered a biomarker of contaminant exposure and are some of the most widely reported behavioral results in toxicological literature. However, the ecological consequences of such behavioral changes, such as effects on toxicant transfer in foodwebs, are far less well understood, complicated in part by the short-term nature of laboratory experiments and the lack of complementary field studies where the nature of toxicant exposure is more complex. Here we examine whether naturally exposed individuals of the round goby, a benthic, site-loyal fish, move in a manner similar to conspecifics from less contaminated habitats. In the laboratory, round goby from a relatively cleaner site showed greater activity and exploration than goby from two highly contaminated sites. Male fish were more active than females but the site effects were similar in both sexes. In contrast to laboratory findings, a field mark-recapture study of 881 round goby showed that fish from the cleaner site did not move greater distances or exhibit shorter residence times within the site than round goby from highly contaminated sites. Our results indicate that while behavioral changes in the laboratory may be one of several useful diagnostics of toxicant exposure of wild-exposed animals, they do not necessarily translate readily into measurable differences in a natural context. Thus, the potential fitness consequences of toxicant exposure based on behavioral changes need to be assessed carefully.

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Cadmium-induced disruption of environmental exploration and chemical communication in matrinxã, Brycon amazonicus

Cited by 19 publications

References 11 publications

Skin extract from Rhamdia quelen(Siluriformes: Heptapteridae) does not promote stress in conspecifics

Skin extract from Rhamdia quelen(Siluriformes: Heptapteridae) does not promote stress in conspecifics

Heavy Metal Pollutants and Chemical Ecology: Exploring New Frontiers

Behavior as biomarker? Laboratory versus field movement in round goby (Neogobius melanostomus) from highly contaminated habitats

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