A study of the osmoregulatory role of the antennary glands in two species of intertidal crabs
department or school: Science, Faculty of
department or school: Zoology, Department of
data provider: DSpace
degree campus: UBCV
creator: Stone, Dmitry David
issued: 2011-11-23T00:57:46Z
issued: 1962
related degree: Master of Science - MSc
degree grantor: University of British Columbia
description: Two species of intertidal crabs, Hemigrapsus oregonensis and H. nudus ocour in large numbers at Spanish Bank, Vancouver, British Columbia. The area is characterized by sea water of high temperature and low salinity in summer and low temperature and high salinity in winter. The crabs osmoregulate strongly in low salinities, keeping blood considerably hypertonic to the external medium. They do not regulate strongly in salinities higher than those normally found in the field in winter (70-80% sea water). This study attempts to establish the role of the excretory organs (antennary glands) in osmoregulation. Effects on their function of seasonal adaptation, temperature, osmotic stress and body size were also investigated. Experimental temperatures of 5°, 15° and 25° C and media of 6%, 12%, 25%, 75%, 100%, 125%, 150% and 175% sea water were used (100% sea water: 31.88% salinity). Animals were brought into the laboratory and equilibrated in 75% sea water for 36-48 hours at the experiments temperature. After equilibration, groups of 10-15 animals were transferred to each of the experimental salinities. After 3, 24 and 48 hours, 10 urine samples were drawn from each group, sealed in separate capillary tubes and quick-frozen. Osmotic concentration was measured by the method of melting point determination. Identical series of experiments were carried out, summer and winter. Procedures differed only in that summer animals were damp-dried and weighed before sampling. For each species and experimental temperature, a series of urine osmotic response curves was drawn. Data for summer-adapted animals at 15° C and winter-adapted animals at 5° C were used for most comparisons. These approximated seasonal mean field temperatures. Osmotic gradients between urine and media at 4-8 hours formed the basis for comparison of seasonally-adapted responses. Data were analysed for salinity and temperature effects and seasonal differences by means of Student's “t" test, which was used also to eval…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/39235
note: A STUDY OP THE GSMOREGtlLATOHY HOLE OP THE ANTENNARX GLANDS IN TWO SPECIES OP INTERTIDAL GBABS by DMITRY DAVID STONE B. A,, University of British Columbia, 1 9 5 4 A THESIS SUBMITTED IN PARTIAL FULFILMENT OP THE REQUIREMENTS FOR TIE DEGREE OP MASTER OP SCIENCE in the Department of ZOOLOGY We accept this thesis as conforming to the required standard THE UNIVERSITY OF BRITISH COLUMBIA Ap r i l , 1$$Z In presenting t h i s t h e s i s i n p a r t i a l f u l f i l m e n t o f the requirements f o r an advanced degree at the U n i v e r s i t y of B r i t i s h Columbia, I agree t h a t the L i b r a r y s h a l l make i t f r e e l y a v a i l a b l e f o r reference and study. I f u r t h e r agree that permission f o r extensive copying of t h i s t h e s i s f o r s c h o l a r l y purposes may be granted by the Head of my Department or by h i s r e p r e s e n t a t i v e s . I t i s understood t h a t copying or p u b l i c a t i o n of t h i s t h e s i s f o r f i n a n c i a l g a i n s h a l l not be allowed without my w r i t t e n permission. Department of Z o o l o g y The U n i v e r s i t y of B r i t i s h Columbia, Vancouver 8, Canada. Date May, 19 62 X ABSTMCO? Two species of inter tidal crabs, KesalKrapsus oregonensis and H. nudus ©cour in large numbers at Spanish Bank, Vancouver, British Columbia. 1'he area Is characterized by sea water of high teaperature and low salinity In suoaer and I O N temperature and high salinity In winter. The Grabs oeatoregulate strongly in low salinities, keeping blood considerably hypertonic to the external medium. They do not regulate strongly In salinities higher than those normally found In the field In winter (70«-80jS sea water). This study attempts to establish the role of the excretory organs (antennary glands) In osmoregulation. Effects on their function of seasonal adaptation, temperature, osmotic stress and body size w e r e also Investigated. Experimental teraperatures of 5 ° , 15° and 25° C and ©edia of 6%, 1…
has type: Thesis/Dissertation
is shown at: 10.14288/1.0302579
language: eng
degree discipline: Zoology
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/39235