Journal ArticleDOI
The hatching of Hymenolepis diminuta eggs and penetration of the hexacanths in Tenebrio molitor beetles
TLDR
Differences in the arrangement of the midgut tissues in adult and larval T. molitor were detected and shown to account for the failure of hexacanths to complete migration in the larvae.Abstract:
The hatching of Hymenolepis diminuta eggs and penetration of the emergent hexacanths in adult and larval Tenebrio molitor beetles had been described. Hatching was shown to be a two-stage process involving rupture of the eggshell by the insect's mandibles and digestion of the remaining egg-layers in the midgut lumen. Penetration of hatched embryos was examined by histological methods that demonstrated the rate of migration and the route taken by hexacanths entering the haemocoel of adult beetles. Differences in the arrangement of the midgut tissues in adult and larval T. molitor were detected and shown to account for the failure of hexacanths to complete migration in the larvae. The role of the embryonic hooks and penetration gland secretions during hatching and penetration has also been discussed.I should like to thank Professor T. R. E. Southwood for providing generous research facilities, Dr June Mahon for her advice and encouragement, and in particular, Dr W. Mordue for his continuous interest and many useful criticisms. This work was conducted during the tenure of a Science Research Council Studentship at Imperial College of Science and Technology, London, S.W. 7.read more
Citations
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Journal ArticleDOI
Host fecundity reduction: a strategy for damage limitation?
TL;DR: Hilary Hurd uses examples of parasitized insects and trematode infections of snails to consider the evolutionary significance of this response to infection in host fecundity reduction.
Journal ArticleDOI
The role of biotic factors in the transmission of free-living endohelminth stages.
TL;DR: It is found that experimental studies generally indicate strong effects of biotic factors, and the latter emerge as potentially important, underestimated determinants in the transmission ecology of free-living endohelminth stages, which implies that biodiversity, in general, should have significant effects on parasite transmission and population dynamics.
Journal ArticleDOI
The dynamics of infection of Tribolium confusum by Hymenolepis diminuta: the influence of infective-stage density and spatial distribution.
Anne E. Keymer,Roy M. Anderson +1 more
TL;DR: The mean parasite burden of a population of Tribolium confusum is shown to rise to a plateau as the exposure density of infective eggs of Hymenolepis diminuta increases, while the level of this plateau is dependent on the nutritional status of the host population.
Journal ArticleDOI
A parasite that increases host lifespan
TL;DR: It is suggested that the optimum trade–off between reproduction and longevity may be altered to favour longer host survivorship, which is likely to enhance parasite transmission.
References
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Book
Histochemistry, theoretical and applied
TL;DR: The new Pearse bids fair to become the leader, even amongst so notable a collection of books devoted entirely or largely to histochemical techniques.
Journal ArticleDOI
Egg-shell formation in trematodes and cestodes
Journal ArticleDOI
Studies on the Biology of some Tapeworms of the Genus Taenia. I.-Factors affecting Hatching and Activation of Taeniid Ova, and some Criteria of their Viability.
TL;DR: In this article, the authors studied the biology of some tapeworms of the Genus Teania and found that they are related to the tapewarm worms of the genus Tania.
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