Ticks and Disease |
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Page 23
... relative to saturation deficiency . At high relative humidities ( 95 % r.h. and over ) , survival is not related to saturation deficiency at all , for in many cases no overall water loss is sustained over a period of weeks or even ...
... relative to saturation deficiency . At high relative humidities ( 95 % r.h. and over ) , survival is not related to saturation deficiency at all , for in many cases no overall water loss is sustained over a period of weeks or even ...
Page 25
... relative humidity , e.g. at 25 ° C , 95 % r.h. ( S.D. 1 · 2 mm Hg ) nearly all ticks ( i.e. I. ricinus ) take up ... relative humidity of about 99.4 % . Yet the tick can still gain water from a relative humidity of 90 % or even from ...
... relative humidity , e.g. at 25 ° C , 95 % r.h. ( S.D. 1 · 2 mm Hg ) nearly all ticks ( i.e. I. ricinus ) take up ... relative humidity of about 99.4 % . Yet the tick can still gain water from a relative humidity of 90 % or even from ...
Page 226
... relative humidity of the macroclimate . Two layers can be recognized within the mat : ( i ) the upper mat for about the top 13 in . and ( ii ) the lower mat of about 1 in . Below this is the soil which extends down to 3-4 in . The grass ...
... relative humidity of the macroclimate . Two layers can be recognized within the mat : ( i ) the upper mat for about the top 13 in . and ( ii ) the lower mat of about 1 in . Below this is the soil which extends down to 3-4 in . The grass ...
Contents
INTRODUCTION | 1 |
CUTICLE THE KEY TO TICK ADAPTABILITY | 10 |
EXTERNAL FEATURES OF SOME ECONOMICALLY IMPORTANT SPECIES | 27 |
Copyright | |
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Common terms and phrases
activity Africa Amblyomma andersoni animals appear areas argasid Argasidae attached Babesia basis capituli bite body Boophilus broad capitulum cattle cells Cervical grooves cheliceral colour coxa coxal cuticle cytoplasm Dermacentor disease dogs dorsal view eggs endocuticle engorged epicuticle evertsi external spur feeding fluid fully fed genus granules Haemaphysalis hairs hard ticks hexagonus Hoogstraal host humidity Hyalomma hypostome infection inner Ixodes ricinus large number larvae larvae and nymphs lateral layer Lees legs length louping ill lumen male mammals membrane microplus moult muscles Nuttall nymphal nymphs nymphs and adults occur palp palpi parasites pathogens period persicus pharynx posterior margin punctations rabbits relapsing fever reported Rhipicephalus rickettsiae rounded salivary glands sanguineus scutum sheep skin soft ticks spermatophore spiracle Spiracular plate spirochaetes spotted fever spur on coxa surface tarsus tarsus IV temperature Theileria tick species tissues transmission transmitted transverse unfed females variabilis vector ventral virus whilst