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dc.contributor.authorGonzales, Tomas T.
dc.contributor.authorKatoh, Masaya
dc.contributor.authorIshimatsu, Atsushi
dc.date.accessioned2014-05-14T03:49:58Z
dc.date.available2014-05-14T03:49:58Z
dc.date.issued2006
dc.identifier.citationGonzales, T. T., Katoh, M., & Ishimatsu, A. (2006). Air breathing of aquatic burrow-dwelling eel goby, Odontamblyopus lacepedii (Gobiidae: Amblyopinae). Journal of Experimental Biology, 209(6), 1085-1092.en
dc.identifier.issn0022-0949
dc.identifier.urihttp://hdl.handle.net/10862/2044
dc.description.abstractOdontamblyopus lacepedii is an eel goby that inhabits both coastal waters and intertidal zones in East Asia, including Japan. The fish excavates burrows in mudflats but, unlike the sympatric amphibious mudskippers, it does not emerge but stays in the burrows filled with hypoxic water during low tide. Endoscopic observations of the field burrows demonstrated that the fish breathed air in the burrow opening; air breathing commenced 1.3 h following burrow emersion, when water PO2 was ∼2.8 kPa, with an air-breathing frequency (fAB) of 7.3±2.9 breaths h–1 (mean ± s.d., N=5). Laboratory experiments revealed that the fish is a facultative air breather. It never breathed air in normoxic water (PO2=20.7 kPa) but started bimodal respiration when water PO2 was reduced to 1.0–3.1 kPa. The fish held air inside the mouth and probably used the gills as gas-exchange surfaces since no rich vascularization occurred in the mouth linings. As is known for other air-breathing fishes, fAB increased with decreasing water PO2. Both buccal gas volume (VB) and inspired volume (VI) were significantly correlated with body mass (Mb). At a given Mb, VI was nearly always equal to VB, implying almost complete buccal gas renewal in every breathing cycle. A temporal reduction in expired volume (VE) was probably due to a low aerial gas exchange ratio (CO2 elimination/O2 uptake). Air breathing appears to have evolved in O. lacepedii as an adaptation to aquatic hypoxia in the burrows. The acquisition of the novel respiratory capacity enables this species to stay in the burrows during low tide and extends the resident time in the mudflat, thereby increasing its chances of tapping the rich resources of the area.en
dc.description.sponsorshipThis study is partly supported by a Grant-in-Aid for Scientific Research from the Japan Society for Promotion of Science (JSPS, 13854006).en
dc.language.isoenen
dc.publisherCompany of Biologistsen
dc.relation.urihttp://jeb.biologists.org/content/209/6/1085.full.pdf
dc.subjectJapanen
dc.titleAir breathing of aquatic burrow-dwelling eel goby, Odontamblyopus lacepedii (Gobiidae: Amblyopinae)en
dc.typeArticleen
dc.citation.volume209
dc.citation.issue6
dc.citation.spage1085
dc.citation.epage1092
dc.citation.journalTitleJournal of Experimental Biologyen
dc.subject.asfaair breathing fishesen
dc.subject.asfaburrowing organismsen
dc.subject.asfagas exchangeen
dc.subject.asfagillsen
dc.subject.asfahypoxiaen
dc.subject.asfaintertidal environmenten
dc.subject.asfamud flatsen
dc.subject.asfarespirationen
dc.identifier.essn1477-9145
dc.identifier.doi10.1242/jeb.02092
dc.subject.scientificNameOdontamblyopus lacepediien


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  • AQD Journal Articles [1213]
    These papers were contributed by AQD staff to various national and international journals

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