<p> The blood and sugars, on which adult black-flies fed, stimulated
the buccal sensilla so that blood. went directly to the midgut and sugars to
the crop. Agglutinin and anticoagulant were found in the salivary glands
of female simuliids. </p> <p> The sequence of peritropbic membrane formation and disappearance are discussed in relation to blood digestion. </p> <p> Digestive enzymes, such as that of trypsin and invertase activity occurred in the midgut of both sexes of several black-fly species unfed or
fed on sucrose, but an increase in enzyme Activity was stimulated in females
by a blood meal. A weak amylase-like activity was found in the midgut, but
the activity was not stimulated by blood- feeding. A greater amylase activity
was found in the residual fluid (haemolymph). Trypsin activity in females,
but not in males, increased also after feeding blood-sucrose mixtures. Blackfly
invertase promoted oligosaccharide synthesis. Trypsin, amylase and invertase
showed pH optima of 8.4, 6.5 and 6.2 respectively. </p> / Thesis / Doctor of Philosophy (PhD)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/21486 |
| Date | 05 1900 |
| Creators | Yang, Yong |
| Contributors | Davies, D. M., Biology |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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