Results
There was a life threatening organization from breed, sex, years and you can real time weight to the tick load away from Bos taurus Colombian cattle types. The particular ecological requirements of each agroecosystem possess influenced the fresh distinctions present in the brand new shipping out of presses on the body from cows. Increased thermal discomfort are of this a high tick burden from inside the cows you to definitely perhaps has actually a diminished quantity of versatility, which relationships will be actually influenced by some of the attributes having an influence on the newest thermal morale of your animal. But not, that it telecommunications between tick weight and you may environment temperature worry could be affected by characteristics of the agroecological area in itself, the newest breed, the newest hereditary resistance of the individual tick in addition to thermal versatility out-of cows.
Colombian cows types was brought to brand new Americas over 500 years ago. Such types keeps an optimal reproductive overall performance , higher meat quality and possess a particular resistance to problems including as the brucellosis . The latest shipment ones types is influenced by the fresh new very diverse agroecological requirements utilized in Colombia. Numerous research shows one to together with the climate and you can habitat type of, other variables like the reproduce, years and sex of animals also have a critical impact to the tick burden in numerous cattle populations [8, fifteen,16,17,18]. Into the Colombia, the latest readily available books with the cows presses details brand new physical and you can environment areas of such parasites and its particular geographical shipment . However, not absolutely all studies have shown new tick weight towards cattle kept under sheer standards, and they did not account fully for outcomes eg breed, decades and you will sex of your own pets or weather variables . Ergo, along with view of the latest paucity of information with the products affecting tick infestations, the purpose of this experiment would be to characterize the new tick burdens from inside the Colombian cows types in order to evaluate the matchmaking ranging from tick en gГјzel Cartagena kadД±nlarД± infestation accounts as well as heat adaptability, using both the AI additionally the THI, around warm criteria.
Climatic variables and heat worry indicator
An overall effect of AI was observed within breeds (F(4,1528) = 3.25, P = 0.0115), with higher tick burdens observed when the AI was higher than 2, although this effect was significant only in the SM (t(1528) = -2.43, P = 0.0153) and ROMO (t(1528) = -2.62, P = 0.0088) breeds. Tick burden was significantly different between breeds for both AI categories (Table 4 and Fig. 5). When the AI values were lower or equal to 2, CCC individuals showed a higher tick burden than all other breeds (30.8 ± 2.6), and a higher tick burden than ROMO and BON when the AI was higher than 2. Likewise, ROMO had a lower tick burden than SM and CCC breeds in both scenarios (AI lower or higher than 2), while BON showed a lower tick burden compared with SM and CCC only when AI was higher than 2 (19.3 ± 2.2).
I found a significant correlation ranging from many years and you can tick weight for the the fresh Colombian types analyzed. Several studies have found a serious effect of age cattle on tick burden [8, sixteen, 17, 21]. Rehman et al. and Lorusso mais aussi al. located a lowered tick weight into the lower legs compared to more mature cattle, and you can Asmaa ainsi que al. noticed a high infestation price when you look at the elderly pet of various ruminant livestock variety.
Ecological transform have a positive otherwise negative effect on the mental temperature control components out-of cattle and probably into tick load of them pets . The better tick load included in SM and you can ROMO pets having an AI > 2 manage imply that cows that have your state away from all the way down versatility, indicated by contact with an effective thermal pain, have a higher awareness to-be infested because of the presses. The higher thermal version of some dogs (which have a keen AI