A survey of the distribution of the Ixodid ticks Boophilus microplus (Canestrini, I888) and Amblyomma cajennense (Fabricius, I787) in Trinidad and Tobago and the possible influence of the survey results on planned livestock development
AbstractA survey of the distribution of Boophilus microplus and Ambfyomma cajennense is described. Population densities were assessed from mean counts within a 100cm2 wire quadrat in three areas of the body of each animal. Whenever possible, tick distribution and density were related to climate and husbandry methods. B. microplus was found throughout Trinidad and Tobago except on land newly cleared from forest, in swamp or lagoons, or where husbandry systems were effective in breaking the life cycle. A. cajemzense was found only in Trinidad on the Cedros peninsula and on the east coast at Mayaro. Popula-tions on Zebu cattle were low. B. annulatus was not found. Species of ticks found on other domestic animals, on man and on trapped wild animals are recorded. The reasons for population variations and distributions are dis-cussed and suggestions are made concerning the possible effects of these factors on future livestock development. The possible acaricidal or repellant action of Cordia curassivica is mentioned.