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Title: Studies on the biology of British pycnogonids
Author: Al-Khafaji, S. S.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1981
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Measurements of leg length, body length, proboscis length and ratios of the length of the claw to that of auxiliary claw and the number of cement gland openings, were used to demonstrate the existence of two distinct species Endeis spinosa (Montagu, 1808) (= Endeis laevis (Grube, 1971)) and Endeischary bdaea (Dohrn, 1881). In addition, E. spinosa was shown to be more tolerant to lower salinity and temperature than E. charybdaea. The biochemical techniques of enzyme electrophoresis were also used to distinguish the two species. The processes of obgenesis and spermiogenesis and the structure of the testes and cement glands in E. charybdaea are described. The structure of the alimentary tract and the process of digestion in the protonymphon larvae and adults of Nymphon gracile (Leach, 1814) and E. spinosa are described. The effect of starvation on gut cells was studied in E. spinosa. The structure of striated muscle in N. gracile was examined.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available