Results
There was a significant connection from breed, sex, decades and you will alive pounds to the tick burden out-of Bos taurus Colombian cows types. The specific ecological standards of any agroecosystem may have affected the variations observed in the brand new delivery out of presses on the body from cows. Increased thermal pain was associated with the a higher tick load from inside the cows you to definitely maybe possess less number of flexibility, which relationship could be personally influenced by a few of the qualities with an influence on brand new thermal spirits of the animal. Although not, that it communication between tick load and you can ecological temperature fret would be influenced by attributes of your own agroecological region by itself, the fresh new reproduce, the new hereditary resistance of the individual tick in addition to thermal versatility of cattle.
Colombian cows breeds was basically brought to the Americas more than 500 years back. This type of breeds have an optimum reproductive efficiency , large meats quality and have now a certain resistance to infection particularly because brucellosis . The fresh new delivery of them breeds is actually affected by the new extremely varied agroecological standards used in Colombia. Several studies have shown you to together with the climate and you can habitat type of, additional factors including the breed, decades and you will sex of your dogs have a critical perception with the tick weight in various cattle populations [8, fifteen,sixteen,17,18]. For the Colombia, the new offered literary works towards cows clicks address contact information the biological and environmental areas of these parasites and its geographic delivery . However, not absolutely all studies have shown the tick load to the cows leftover not as much as natural conditions, and they failed to take into account effects such as reproduce, age and sex of your pet otherwise climate variables . Therefore, as well as in view of the newest paucity of information towards points impacting tick infestations, the goal of this try would be to characterize this new tick burdens when you look at the Colombian cows types and to measure the matchmaking anywhere between tick infestation account and heat flexibility, using both the AI therefore the THI, lower than warm criteria.
Climatic parameters and heat be concerned indicator
An overall effect of AI was observed within breeds (F(cuatro,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).
We discovered a serious relationship anywhere between years and tick burden from inside the new Colombian types analyzed. Multiple research has receive a significant effectation of the age of cows with the tick load [8, 16, 17, 21]. Rehman et al. and you will Lorusso mais aussi al. located a lower tick load within the calves compared to the earlier cows, and you will Asmaa et al. observed a top infestation rate inside earlier pets various ruminant livestock kinds.
Environmental alter enjoys a https://kissbrides.com/tr/sicak-belize-kadinlar/ positive or negative impact on the brand new mental temperatures control components off cattle and you will potentially towards the tick burden of these pets . The better tick weight used in SM and ROMO pet having an AI > 2 carry out signify cows with a state away from lower adaptability, indicated of the contact with a thermal problems, provides a top sensitivity to be infested by the clicks. The higher thermal version of some animals (which have a keen AI
