Findings

Discover a critical relationship away from breed, sex, age and you may alive weight towards tick load away from Bos taurus Colombian cows types. This environment conditions of every agroecosystem might have affected the fresh new differences noticed in the delivery off ticks on the body out of cows. A high thermal problems try from the a high tick load inside cattle that perhaps provides a reduced quantity of flexibility, and that matchmaking could well be actually affected by a few of the qualities having an influence on the newest thermal spirits of your own animal. not, it telecommunications between tick weight and you will environmental temperature be concerned would-be affected by properties of agroecological region by itself, the brand new breed, the fresh new hereditary opposition of the person tick in addition to thermal adaptability out-of cows.

Colombian cows types was indeed brought to the new Americas over 500 in years past. These types of breeds features an optimal reproductive performance , higher meats top quality and just have a particular resistance to problems such as due to the fact brucellosis . Brand new shipping of them types is affected by the extremely varied agroecological criteria used in Colombia. Numerous research shows one to aside from the climate and you can environment sorts of, other variables like the reproduce, ages and you can sex of your pet supply a serious impression into tick burden in various cattle populations [8, 15,16,17,18]. From inside the Colombia, the fresh readily available books towards the cattle ticks address the newest physiological and you can environmental areas of this type of parasites and its own geographic shipping . Although not, never assume all studies have shown the tick weight to your cattle kept under pure conditions, that didn’t account for consequences including breed, ages and you may sex of one’s pet or climate variables . Ergo, plus in look at the paucity of information into onun hakkД±nda the facts impacting tick infestations, the goal of which try out would be to define brand new tick burdens in Colombian cattle types and also to evaluate the relationship between tick infestation membership and heat versatility, using the AI and THI, below tropical conditions.

Climatic variables as well as heat fret 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 relationship ranging from ages and you will tick burden during the brand new Colombian breeds analyzed. Multiple research has found a critical aftereffect of age cattle for the tick load [8, sixteen, 17, 21]. Rehman ainsi que al. and you can Lorusso et al. located a lower tick load within the lower legs compared to more mature cattle, and you can Asmaa ainsi que al. noticed a top infestation rates in more mature pets of different ruminant animals species.

Environment alter provides a positive or bad influence on the new mental heat controls elements off cattle and potentially into tick load of them pets . The greater tick weight found in SM and you can ROMO dogs having a keen AI > dos perform mean that cows that have your state regarding straight down flexibility, conveyed by exposure to an effective thermal problems, features a high susceptibility getting plagued from the ticks. The greater thermal variation of some pet (that have an enthusiastic AI