geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Effect of tilting on blood pressure and interstitial fluid pressures of bluefish and smooth dogfish


, : Effect of tilting on blood pressure and interstitial fluid pressures of bluefish and smooth dogfish. American Journal of Physiology 242(1): R70-R76

Tolerance of the circulatory system of fish for gravitational stress has not been measured previously. We examined this in bluefish (Pomatomus saltatrix) and smooth dogfish (Mustelus canis) by placing them horizontally on a V-board in air while their gills were perfused with aerated seawater, then tilting them head up for 0.5 h, and finally returning them to horizontal. Meanwhile, we recorded the blood pressure, pulse pressure, and heart rate in the ventral aorta, and interstitial fluid pressure in the head and tail. All four bluefish tolerated a 30 degrees tilt or even a 60 degrees tilt with little change in blood pressure or interstitial pressure in the anterior and posterior regions. All recovered afterward. However, in the seven dogfish examined, the posterior interstitial fluid pressure increased from 2.8 +/- 1.0 cmH2O before tilting to 11.8 +/- 3.3 cmH2O toward the end of a 30 degrees tilt lasting 30 min. The blood pressure decreased as the pulse pressure approached zero, showing that circulatory insufficiency had developed due to insufficient venous return to the heart. Most of the dogfish died within a few hours after the experiment. These findings are in keeping with the conclusion that the vasculature of bluefish has more rigidity, less permeability, and perhaps more compensatory tone than that of smooth dogfish. We speculate that bluefish may have evolved their circulatory tolerance for gravity as a cross-adaptation to the stresses imposed on the circulation by forward acceleration and by regional differences of transcutaneous pressure occurring during fast carangiform swimming.

US$29.90

PMID: 7058932


Other references

Bender, A.; Stange, K., 1994: Commercial software for the amplification of automatic weather station data. Paper er 1994 (94-2156 94-2185)

Mahon, J.N.; Rohan, K.J.; Nillni, Y.I.; Zvolensky, M.J., 2015: The role of perceived control over anxiety in prospective symptom reports across the menstrual cycle. The present investigation tested the role of psychological vulnerabilities to anxiety in reported menstrual symptom severity. Specifically, the current study tested the incremental validity of perceived control over anxiety-related events in predi...

Klusacek, J.; Diblik, T.; Fiedler, J.; Jelinkova, V., 1987: The relationship of growth with reproductive performance of sows. Data were obtained on 4588 gilts of the maternal breeds in a commercial hybridization programme. For Czechoslovakian Improved White (CIW), Landrace and Prestice gilts, daily gain from birth to 100 kg body weight averaged 538, 539 and 539 g resp. (...

Giordani Soika, A., 1936: Etologia e larva primaria di Melecta luctuosa Scop. (Hym. Apidae). Bollettino della Societa Entomologica Italiana, 68: 47-48

Maulik Tapendra Nath, 1965: On the effect of low-velocity channel inside the Earth. Bulletin of the Seismological Society of America: , Pages 121-133. 1965.

Hipp, A., 1994: A medical student eyes health care reform. Journal of the American Medical Women's Association 49(3): 71-71

Cochran, J.W., 1978: Pancreatic pseudocyst presenting as massive hemothorax: a case report. The case of a 36-year old man who presented with massive recurrent hemothorax as a complication of a pancreatic pseudocyst is described. Some of the complications of pancreatitis and pancreatic pseudocysts are discussed. Recurrent hemothorax repre...

Di Nisio, M.; Porreca, E.; Ferrante, N.; Otten, H-Martin.; Cuccurullo, F.; Rutjes, A.W.S., 2012: Primary prophylaxis for venous thromboembolism in ambulatory cancer patients receiving chemotherapy. Venous thromboembolism (VTE) often complicates the clinical course of cancer disease. The risk is further increased by chemotherapy but the safety and efficacy of primary thromboprophylaxis in cancer patients treated with chemotherapy is uncertain...

Covelman, K.; Scott, S.; Cohen, D.E.; Shapiro, B.S.; Howe, C.J.; Silver, M.; Osborne, M.L., 1991: Comment on 'Simultaneous interview technique for patients with persistent pain' by L. Jacobson, A.J. Mariano, C. Chabal and E.F. Chaney in Pain, 45 (1991) 105-106. Pain 47(1): 124-125

Olmi, M., 1986: Description of new species of Dryinidae (Hymenoptera Chrysidoidea). Among the 25 new species of parasitic Dryinidae that are described (together with the males of 3 other species of which only the females had previously been known), the only species recovered from a host of economic importance was Gonatopus superb...