Results
There’s a life threatening relationship away from breed, sex, ages and you will live lbs toward tick burden out of Bos taurus Colombian cattle types. The environmental standards of each agroecosystem might have affected new distinctions present in the brand new distribution from presses on the body off cows. A top thermal aches was regarding the a top tick load in cattle you to maybe provides a lowered number of flexibility, and this relationship was privately influenced by a number of the traits with an impact on brand new thermal comfort of the animal. However, this telecommunications between tick weight and you may ecological temperature be concerned might possibly be influenced by services of your agroecological part alone, the fresh new breed, the latest genetic opposition of the individual tick therefore the thermal adaptability regarding cattle.
Colombian cows types was in fact taken to the new Americas more than 500 in years past. Such types has actually an optimum reproductive efficiency , higher beef quality and have now a certain effectiveness disease for example once the brucellosis . The brand new delivery ones breeds try impacted by this new very varied agroecological criteria found in Colombia. Multiple research shows one besides the weather and you may environment type, other factors like the breed, ages and you will sex of one’s pet also provide a critical effect toward tick weight in almost any cattle communities [8, 15,sixteen,17,18]. Inside the Colombia, the latest offered books to your cattle presses address contact information the fresh physiological and you will environment aspects of this type of parasitic organisms as well as geographical shipments . However, not totally all research shows the new tick weight towards cows kept around sheer requirements, and they did not take into account effects such as for instance reproduce, age and you can sex of pet or environment details . Hence, and in look at new paucity of data towards issues affecting tick infestations, the goal of which try out were to characterize the newest tick burdens for the Colombian cattle breeds also to assess the dating between tick infestation membership as well as heat adaptability, using the AI as well as the THI, not as much as tropical criteria.
Climatic parameters 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 https://kissbrides.com/tr/dogu-avrupali-kadinlar/ 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).
We located a significant relationship anywhere between ages and you may tick weight into the the fresh Colombian breeds analyzed. Several research has found a significant aftereffect of the age of cows to your tick burden [8, 16, 17, 21]. Rehman mais aussi al. and Lorusso et al. discover a reduced tick burden when you look at the calves versus old cattle, and you will Asmaa ainsi que al. noticed increased infestation price from inside the old pet various ruminant livestock kinds.
Environment transform keeps a positive or negative influence on the new physiological temperature regulation components of cows and you may probably for the tick burden of those pets . The greater tick load found in SM and you can ROMO animals that have an enthusiastic AI > 2 create mean that cows with your state regarding lower flexibility, indicated because of the connection with an excellent thermal pain, possess a higher awareness to get infested from the ticks. The higher thermal type of a few dogs (that have an AI