Effects of polychlorinated biphenyls on the schooling behavior of Japanese medaka (<i>Oryzias latipes</i>)

Nakayama, Kei; Oshima, Yuji; Hiramatsu, Kazumasa; Shimasaki, Yohei; Honjo, Tasuku

doi:10.1897/04-518r2.1

Cited by 39 publications

(27 citation statements)

References 23 publications

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“…In schools of cod ( Gadus morhua ), saithe ( Pollachius virens ), and herring ( Clupea harengus ), the nearest neighbor distance (NND) is maintained within a set range, and the relative positions are not stable [4],[6]. In the schooling medaka group (6 individuals) in an aquarium (98 cm square and 10 cm deep), the NND is maintained within 2–3 cm [17], which is consistent with the result using a pair of adult medaka fish. Here we showed that the distance between the two fish was not maintained in a static condition (Fig.…”

Section: Discussionmentioning

confidence: 99%

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Coordinated and Cohesive Movement of Two Small Conspecific Fish Induced by Eliciting a Simultaneous Optomotor Response

et al. 2010

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BackgroundIn animal groups such as herds, schools, and flocks, a certain distance is maintained between adjacent individuals, allowing them to move as a cohesive unit. Proximate causations of the cohesive and coordinated movement under dynamic conditions, however, have been poorly understood.Methodology/Principal FindingsWe established a novel and simple behavioral assay using pairs of small fish (medaka and dwarf pufferfish) by eliciting a simultaneous optomotor response (OMR). We demonstrated that two homospecific fish began to move cohesively and maintained a distance of 2 to 4 cm between them when an OMR was elicited simultaneously in the fish. The coordinated and cohesive movement was not exhibited under a static condition. During the cohesive movement, the relative position of the two fish was not stable. Furthermore, adult medaka exhibited the cohesive movement but larvae did not, despite the fact that an OMR could be elicited in larvae, indicating that this ability to coordinate movement develops during maturation. The cohesive movement was detected in homospecific pairs irrespective of body-color, sex, or albino mutation, but was not detected between heterospecific pairs, suggesting that coordinated movement is based on a conspecific interaction.Conclusions/SignificanceOur findings demonstrate that coordinated behavior between a pair of animals was elicited by a simultaneous OMR in two small fish. This is the first report to demonstrate induction of a schooling-like movement in a pair of fish by an OMR and to investigate the effect of age, sex, body color, and species on coordination between animals under a dynamic condition.

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Section: Discussionmentioning

confidence: 99%

“…For example, a single medaka fish tends to approach a conspecific group [14] as well as a mirror image of its own figure [15]. (2) When medakas form a school, individual fish tend to maintain a nearest-neighbor distance [16],[17].…”

Section: Introductionmentioning

confidence: 99%

Coordinated and Cohesive Movement of Two Small Conspecific Fish Induced by Eliciting a Simultaneous Optomotor Response

et al. 2010

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“…At present, the knowledge of the neurotoxic effects and toxicological mechanisms induced by PCB 153 in fish is scarce. However, there exist reports that this compound produces behavior abnormalities in fish that may negatively influence survival (Nakayama et al, 2005). The cod brain proteome was analyzed to reveal molecular targets and pathways involved in PCB 153 neurotoxicity.…”

Section: Effects Of Polychlorinated Biphenyls (Pcb) On the Cod Brainmentioning

confidence: 99%

Integrative Environmental Genomics of Cod (Gadus morhua): The Proteomics Approach

Karlsen

Bjørneklett

Berg

et al. 2011

Journal of Toxicology and Environmental Health, Part A

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Atlantic cod (Gadus morhua) is an essential species in North Atlantic fisheries and increasingly relevant as an aquaculture species. However, potential conflicts with both coastal industry and petroleum industry expanding into northern waters make it important to understand how effluents (produced water, pharmaceuticals, food contaminants, and feed contaminants) affect the growth, reproduction, and health of this species in order to maintain a sustainable cod population and a healthy human food source, and to discover biomarkers for environmental monitoring and risk assessment. The ongoing genome sequencing effort of Atlantic cod has opened the possibility for a systems biology approach to elucidate molecular mechanisms of toxicity. Our study aims to be a first step toward such a systems toxicology understanding of genomic responses to environmental insults. A toxicogenomic approach was initiated that is combining data generated from proteomics analyses and transcriptomics analyses, and the concurrent development of searchable expressed sequence tags (EST) databases and genomic databases. This interdisciplinary study may also open new possibilities of gene annotation and pathway analyses.

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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: 99%

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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Effects of polychlorinated biphenyls on the schooling behavior of Japanese medaka (Oryzias latipes)

Cited by 39 publications

References 23 publications

Coordinated and Cohesive Movement of Two Small Conspecific Fish Induced by Eliciting a Simultaneous Optomotor Response

Coordinated and Cohesive Movement of Two Small Conspecific Fish Induced by Eliciting a Simultaneous Optomotor Response

Integrative Environmental Genomics of Cod (Gadus morhua): The Proteomics Approach

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

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