FORMATION OF HYPOXIC BOUNDARY-LAYERS AND THEIR BIOLOGICAL IMPLICATIONS IN A SKIN-BREATHING AQUATIC SALAMANDER, DESMOGNATHUS-QUADRAMACULATUS

被引:28
作者
BOOTH, DT [1 ]
FEDER, ME [1 ]
机构
[1] UNIV CHICAGO,COMM EVOLUTIONARY BIOL,CHICAGO,IL 60637
来源
PHYSIOLOGICAL ZOOLOGY | 1991年 / 64卷 / 05期
关键词
D O I
10.1086/physzool.64.5.30156247
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
We examined hypoxic boundary layers surrounding the skin-breathing aquatic plethodontid salamander Desmognathus quadramaculatus and investigated the flow regime in the natural habitat of this species. In slow-flowing water (< 10 cm.s-1), which we found to be the preferred microhabitat in nature, the boundary layer is the major resistance to oxygen uptake. Consequently, PO2 at the skin surface in slow-flowing water falls below 60 Torr even though PO2 in the free stream exceeds 150 Torr, and aerobic metabolism is severely impaired. Four salamanders survived reduced aerobic metabolism for 4 mo in the laboratory, implying that D. quadramaculatus can severely restrict overall metabolic needs and/or makes extensive use of anaerobic metabolic pathways.
引用
收藏
页码:1307 / 1321
页数:15
相关论文
共 21 条
[1]   INFLUENCE OF BODY SIZE AND TEMPERATURE ON CRITICAL OXYGEN-TENSION OF SOME PLETHODONTID SALAMANDERS [J].
BECKENBACH, AT .
PHYSIOLOGICAL ZOOLOGY, 1975, 48 (04) :338-347
[2]  
BURGGREN WW, 1986, J EXP BIOL, V121, P445
[3]  
CONANT R, 1986, REPTILES AMPHIBIANS
[4]   METABOLIC OXYGEN REGULATION AND CONFORMITY DURING SUBMERGENCE IN THE SALAMANDERS SIREN-LACERTINA, AMPHIUMA-MEANS, AND AMPHIUMA-TRIDACTYLUM, AND A COMPARISON WITH OTHER GIANT SALAMANDERS [J].
DUKE, JT ;
ULTSCH, GR .
OECOLOGIA, 1990, 84 (01) :16-23
[5]   ELIMINATION KINETICS OF ACETYLENE AND FREON-22 IN RESTING AND ACTIVE LUNGLESS SALAMANDERS [J].
FEDER, ME ;
FULL, RJ ;
PIIPER, J .
RESPIRATION PHYSIOLOGY, 1988, 72 (02) :229-240
[6]   LUNGLESSNESS, BODY SIZE, AND METABOLIC-RATE IN SALAMANDERS [J].
FEDER, ME .
PHYSIOLOGICAL ZOOLOGY, 1976, 49 (04) :398-406
[7]  
FEDER ME, 1988, AM ZOOL, V28, P973
[8]   ANAEROBIC ENERGY-METABOLISM DURING SEVERE HYPOXIA IN THE LUNGLESS SALAMANDER DESMOGNATHUS-FUSCUS (PLETHODONTIDAE) [J].
GATZ, RN ;
PIIPER, J .
RESPIRATION PHYSIOLOGY, 1979, 38 (03) :377-384
[9]   INEXPENSIVE THERMISTOR FLOWMETER FOR AQUATIC BIOLOGY [J].
LABARBERA, M ;
VOGEL, S .
LIMNOLOGY AND OCEANOGRAPHY, 1976, 21 (05) :750-756
[10]  
MALVIN GM, 1988, AM ZOOL, V28, P999