Findings
There clearly was a significant relationship of breed, sex, decades and you will real time weight with the tick weight of Bos taurus Colombian cows types. The specific environmental requirements of any agroecosystem possess affected this new variations present in the latest delivery off presses on your body away from cattle. A top thermal pain try in the a top tick weight when you look at the cattle that maybe has actually a lesser level of adaptability, and this relationships could be yourself impacted by a number of the faculties having an influence on the newest thermal comfort of the creature. ()Although not, it interaction ranging from tick burden and you will ecological heat be concerned would be influenced by functions of your own agroecological region alone, brand new reproduce, new genetic opposition of the person tick and also the thermal flexibility out-of cattle.
Colombian cows breeds was in fact taken to the Americas over 500 years back. Such types possess an optimal reproductive efficiency , higher beef quality and then have a certain effectiveness ailment like given that brucellosis . New shipment of them types try impacted by the fresh very varied agroecological criteria included in Colombia. Several research shows you to definitely together with the climate and you can environment method of, other variables such as the reproduce, decades and you will sex of your own pets likewise have a serious effect for the tick burden in almost any cows populations [8, 15,sixteen,17,18]. During the Colombia, the new available literary works for the cattle clicks details the fresh new physical and you will ecological areas of these types of parasites and its own geographical shipment . However, not absolutely all research shows brand new tick load to your cows seksi Almanya kД±z left around absolute conditions, and they didn’t account fully for outcomes for example reproduce, years and you may sex of one’s animals or weather details . Ergo, and in look at the latest paucity of data on issues impacting tick infestations, the aim of which test were to characterize the latest tick burdens when you look at the Colombian cattle types in order to assess the relationship ranging from tick infestation membership as well as heat flexibility, playing with the AI and the THI, significantly less than exotic requirements.
Climatic parameters as well as heat worry indices
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 critical relationship ranging from decades and you will tick burden inside new Colombian breeds examined. Multiple research has receive a critical aftereffect of the age of cows to your tick load [8, sixteen, 17, 21]. Rehman et al. and you will Lorusso mais aussi al. discovered less tick load in the calves versus old cattle, and you will Asmaa ainsi que al. noticed a high infestation speed inside earlier dogs of different ruminant livestock kinds.
Environment changes has a confident otherwise negative influence on the latest physiological temperature controls systems of cows and you may potentially on the tick load of these pet . The higher tick load used in SM and you may ROMO pets which have an enthusiastic AI > 2 carry out imply that cattle that have your state of all the way down flexibility, conveyed from the connection with a great thermal aches, provides a higher susceptibility getting plagued of the clicks. The greater thermal adaptation of some pets (with a keen AI