Findings
There’s a significant organization from breed, sex, decades and you may real time lbs on tick load regarding Bos taurus Colombian cows breeds. The particular environment criteria of each agroecosystem possess inspired the newest distinctions seen in the fresh shipment regarding presses on your body regarding cows. A higher thermal discomfort try of this increased tick burden inside the cows one perhaps has actually less amount of adaptability, and that matchmaking is myself impacted by some of the qualities which have an influence on the new thermal spirits of one’s creature. not, so it correspondence between tick weight and ecological temperatures be concerned will be affected by functions of one’s agroecological region itself, the breed, the fresh hereditary resistance of the individual tick plus the thermal flexibility away from cattle.
Colombian cows breeds have been brought to brand new Americas over 500 years back. These types of breeds features a maximum reproductive performance , higher meat quality and get a specific resistance to diseases like once the brucellosis . Brand new shipping ones types is actually affected by brand new extremely diverse agroecological standards included in Colombia. Multiple studies have shown you to definitely aside from the climate and you will environment sorts of, additional factors including the breed, age and you will sex of your own animals also provide a critical effect on the tick load in almost any cattle communities [8, 15,16,17,18]. When you look at the Colombia, the latest readily available literary works into the cows presses tackles new biological and you may ecological regions of such parasites as well as geographic shipments . Although not, not absolutely all research shows the fresh tick weight towards cows leftover less than pure requirements, and these did not account fully for outcomes instance breed, age and you can sex of pets otherwise climate parameters . Thus, plus in look at the fresh new paucity of data on the affairs affecting tick infestations, the purpose of this experiment were to define this new tick burdens into the Colombian cows breeds and to gauge the relationships anywhere between tick infestation membership and heat versatility, using the AI together with THI, not as much as exotic criteria.
Climatic details as well as heat be concerned indices
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).
We receive a life threatening correlation ranging from decades and tick load during the the fresh new Colombian breeds evaluated. Several research has located a critical effectation of age cows to the tick weight [8, sixteen, 17, 21]. Rehman et al. and you may Lorusso et al. discover a lower tick load in lower legs versus earlier cattle, and Asmaa ainsi que al. observed a higher infestation speed in the old dogs of various ruminant animals varieties.
Environment changes have an optimistic or negative influence on the new psychological temperature control systems away from cows and you can possibly to your tick burden ones pets . The higher tick burden utilized in SM and you may ROMO dogs that have a keen AI > dos carry out mean that cattle that have a state regarding Japon kadД±n personel all the way down adaptability, shown from the exposure to a beneficial thermal problems, enjoys a top awareness to get plagued because of the clicks. The higher thermal adaptation of some pet (having an AI