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Foam nest production in the armoured catfish (1997)

Andrade, D. V. ; Abe, A. S.

Oxford, UK : Blackwell Publishing Ltd

Journal of fish biology 50 (1997), S. 0

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ISSN: 1095-8649

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Biology

Notes: Foam nest production in Hoplosternum littorale is described in detail. This fish produces foam, while swimming belly-up, by pumping water over the gills and using their pelvic fins to mix water and mucus. The bubbles resulting from this process are added to plant debris carried by the male, which possesses a specialized pectoral fin spine to perform such activity.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1095-8649.1997.tb01957.x

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Pulmonary diffusing capacity in reptiles (Relations to temperature and O2-uptake) (1981)

Glass, M. L. ; Johansen, K. ; Abe, A. S.

Springer

Journal of comparative physiology 142 (1981), S. 509-514

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ISSN: 1432-136X

Source: Springer Online Journal Archives 1860-2000

Topics: Biology , Medicine

Notes: Summary Pulmonary CO-diffusing capacity (D l CO), lung volume, pulmonary perfusion and O2-uptake were measured by non-invasive techniques in the lizardsVaranus exanthematicus andTupinambis teguixin (mean body weight 2.2 kg for both species). The CO-diffusing capacity was at 25–27°C 0.059 mlstpd·kg−1·min−1·Torr−1 inVaranus, which is 47% greater than the value of 0.040 mlstpd·kg−1·min−1·Torr−1 inTupinambis. The lung volume ofVaranus was 36 ml·kg−1 and that ofTupinambis 20 ml·kg−1. At 35–37°C the diffusing capacity of lizard lungs are about 25% of those for mammals of comparable size. InVaranus pulmonary CO-diffusing capacity increased with temperature from 0.027 mlstpd·kg−1·min−1·Torr−1 at 17–19 °C to 0.075 mlstpd·kg−1·min−1·Torr−1 at 35–37 °C. This change closely matched a concomitant increase of O2-uptake. Pulmonary perfusion increased from 27 ml·kg−1·min−1 to 55 ml·kg−1·min−1 within this temperature range. The study emphasizes that pulmonary diffusing capacity cannot be fully evaluated without information on pulmonary perfusion and O2-uptake. In reptiles and other ectotherms diffusing capacity must be reported at specified body temperature.