Results
There can be a serious connection off reproduce, sex, years and you may alive weight to your tick weight out of Bos taurus Colombian cows types. The particular environmental requirements each and every agroecosystem possess inspired the new variations observed in the fresh shipments from ticks on your body off cattle. Increased thermal aches is actually associated with a higher tick burden into the cattle you to perhaps has a diminished level of adaptability, and therefore relationships would-be really affected by some of the attributes that have an impact on the brand new thermal comfort of your animal. Although not, this communications between tick weight and you may environmental temperatures stress could well be affected by functions of one’s agroecological part alone, the breed, the brand new genetic opposition of the person tick therefore the thermal adaptability from cattle.
Colombian cows breeds was in fact taken to brand new Americas over 500 years ago. These breeds have a finest reproductive results , high beef top quality and possess a specific effectiveness problems such since the brucellosis . The newest delivery of them breeds are affected by the new most diverse agroecological standards found in Colombia. Multiple studies have shown one aside from the environment and you may environment sorts of, additional factors for instance the breed, years and you may sex of one’s pet supply a significant perception into the tick weight in different cows populations [8, fifteen,16,17,18]. In Colombia, the latest available literature to the cattle ticks tackles the brand new physical and you will environment areas of this type of parasites and its own geographic distribution . Yet not, not absolutely all research shows the fresh tick load toward cows remaining around sheer criteria, that didn’t take into account outcomes instance reproduce, years and you may sex of the animals or weather variables . Thus, and also in look at the fresh paucity of data to the items affecting tick infestations, the purpose of so it try out would be to define the newest tick burdens during the Colombian cows breeds and also to gauge the relationships ranging from tick infestation membership and heat adaptability, using the AI as well as the THI, less than tropical standards.
Climatic details 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 critical relationship ranging from ages and you will tick burden in the newest Colombian types evaluated. Several studies have discover a critical effect of age cattle into tick weight [8, 16 kissbrides.com Еџimdi git, 17, 21]. Rehman mais aussi al. and you may Lorusso mais aussi al. located a lower tick burden inside calves as compared to more mature cows, and you will Asmaa et al. noticed a higher infestation price when you look at the older dogs of different ruminant animals kinds.
Ecological changes possess an optimistic or bad affect the latest psychological temperature control elements off cows and you will probably into tick weight of them pets . The greater tick load utilized in SM and you can ROMO animals having a keen AI > 2 manage indicate that cows with a state regarding straight down flexibility, expressed by connection with a great thermal serious pain, features a top sensitivity getting infested from the clicks. The greater thermal version of a few animals (that have an enthusiastic AI