New Zealand Journal of Marine and Freshwater Research abstracts

---

Haemolymph acid-base status of the stalked barnacle Calantica spinosa

ALASTAIR J. INNES*

Portobello Marine Laboratory University of Otago P. O. Box 56, Dunedin New Zealand

Abstract Haemolymph pH and P_co were determined for the pedunculate intertidal barnacle Calantica spinosa (Quoy & Gaimard) during submersion and aerial exposure at 15°C. The increase in haemolymph P_co (4.1 to 7.1 mm Hg) and concomitant decrease in haemolymph pH (7.36 to 7.22) described for C. spinosa during exposure in air are characteristic for aquatic invertebrates during short-term emersion. In vivo haemolymph pH during submergence was determined for barnacles acclimated to a range of temperatures between 5 and 25°C. The pH of Calantica haemolymph is maintained at a constant relative alkalinity of ~0.2 pH units. In vivo haemolymph pH varies with temperature (T, °C) according to the relationship ApH/AT = -0.0192 pH units "C"¹.

Keywords Calantica spinosa; barnacle; intertidal; acid-base status; haemolymph

New Zealand Journal of Marine and Freshwater Research, 1986, Vol. 20: 139-145 Received 31 August 1984; accepted 28 March 1985

PDF file of entire paper: medium quality (572K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page