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Environmental modulation of the onset of air breathing and survival of Betta splendens and Trichopodus trichopterus.

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Title: Environmental modulation of the onset of air breathing and survival of Betta splendens and Trichopodus trichopterus.
Authors: Mendez‐Sanchez, J. F.1,2, Burggren, W. W.1
Source: Journal of Fish Biology. Mar2014, Vol. 84 Issue 3, p794-807. 14p.
Subjects: Air-breathing fishes, Siamese fighting fish, Gourami, Hypoxemia, Fish larvae, Partial pressure, Fertilization (Biology), Fishes
Abstract: The effect of hypoxia on air-breathing onset and survival was determined in larvae of the air-breathing fishes, the three spot gourami Trichopodus trichopterus and the Siamese fighting fish Betta splendens. Larvae were exposed continuously or intermittently (12 h nightly) to an oxygen partial pressure ( PO2) of 20, 17 and 14 kPa from 1 to 40 days post-fertilization ( dpf). Survival and onset of air breathing were measured daily. Continuous normoxic conditions produced a larval survival rate of 65-75% for B. splendens and 15-30% for T. trichopterus, but all larvae of both species died at 9 dpf in continuous hypoxia conditions. Larvae under intermittent (nocturnal) hypoxia showed a 15% elevated survival rate in both species. The same conditions altered the onset of air breathing, advancing onset by 4 days in B. splendens and delaying onset by 9 days in T. trichopterus. These interspecific differences were attributed to air-breathing characteristics: B. splendens was a non-obligatory air breather after 36 dpf, whereas T. trichopterus was an obligatory air breather after 32 dpf. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Fish Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: Environmental modulation of the onset of air breathing and survival of Betta splendens and Trichopodus trichopterus.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Fish+Biology%22">Journal of Fish Biology</searchLink>. Mar2014, Vol. 84 Issue 3, p794-807. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Air-breathing+fishes%22">Air-breathing fishes</searchLink><br /><searchLink fieldCode="DE" term="%22Siamese+fighting+fish%22">Siamese fighting fish</searchLink><br /><searchLink fieldCode="DE" term="%22Gourami%22">Gourami</searchLink><br /><searchLink fieldCode="DE" term="%22Hypoxemia%22">Hypoxemia</searchLink><br /><searchLink fieldCode="DE" term="%22Fish+larvae%22">Fish larvae</searchLink><br /><searchLink fieldCode="DE" term="%22Partial+pressure%22">Partial pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Fertilization+%28Biology%29%22">Fertilization (Biology)</searchLink><br /><searchLink fieldCode="DE" term="%22Fishes%22">Fishes</searchLink>
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  Data: The effect of hypoxia on air-breathing onset and survival was determined in larvae of the air-breathing fishes, the three spot gourami Trichopodus trichopterus and the Siamese fighting fish Betta splendens. Larvae were exposed continuously or intermittently (12 h nightly) to an oxygen partial pressure ( PO2) of 20, 17 and 14 kPa from 1 to 40 days post-fertilization ( dpf). Survival and onset of air breathing were measured daily. Continuous normoxic conditions produced a larval survival rate of 65-75% for B. splendens and 15-30% for T. trichopterus, but all larvae of both species died at 9 dpf in continuous hypoxia conditions. Larvae under intermittent (nocturnal) hypoxia showed a 15% elevated survival rate in both species. The same conditions altered the onset of air breathing, advancing onset by 4 days in B. splendens and delaying onset by 9 days in T. trichopterus. These interspecific differences were attributed to air-breathing characteristics: B. splendens was a non-obligatory air breather after 36 dpf, whereas T. trichopterus was an obligatory air breather after 32 dpf. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Fish Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/jfb.12322
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      – Code: eng
        Text: English
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        PageCount: 14
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      – SubjectFull: Air-breathing fishes
        Type: general
      – SubjectFull: Siamese fighting fish
        Type: general
      – SubjectFull: Gourami
        Type: general
      – SubjectFull: Hypoxemia
        Type: general
      – SubjectFull: Fish larvae
        Type: general
      – SubjectFull: Partial pressure
        Type: general
      – SubjectFull: Fertilization (Biology)
        Type: general
      – SubjectFull: Fishes
        Type: general
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      – TitleFull: Environmental modulation of the onset of air breathing and survival of Betta splendens and Trichopodus trichopterus.
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            NameFull: Mendez‐Sanchez, J. F.
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            NameFull: Burggren, W. W.
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              Text: Mar2014
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