Conclusions
Discover a significant organization away from reproduce, https://kissbrides.com/tr/blog/posta-siparisi-gelin-istatistikler/ sex, years and you may real time weight into the tick weight regarding Bos taurus Colombian cattle types. The ecological conditions of every agroecosystem could have impacted new variations found in brand new shipments regarding clicks on the body of cattle. A higher thermal problems is from the a high tick weight into the cattle one possibly enjoys a lower life expectancy number of versatility, hence matchmaking could be actually affected by a few of the faculties with an influence on the fresh new thermal morale of your animal. Yet not, it communication ranging from tick load and you will ecological temperature fret could well be impacted by characteristics of your own agroecological region in itself, the fresh new breed, the fresh hereditary resistance of the person tick and the thermal adaptability from cattle.
Colombian cows breeds was in fact delivered to the fresh new Americas more than 500 years back. This type of breeds features a maximum reproductive results , large beef high quality while having a specific effectiveness disease for example once the brucellosis . The brand new shipping of those breeds was influenced by the newest really diverse agroecological requirements utilized in Colombia. Numerous research shows that in addition to the climate and you will environment type of, other variables including the reproduce, ages and you will sex of animals supply a serious feeling towards tick burden in almost any cattle communities [8, 15,sixteen,17,18]. When you look at the Colombia, the latest offered books into the cattle presses tackles the fresh physical and you may environment regions of these parasites and its geographical distribution . Although not, not all the studies have shown the fresh tick load into the cows left significantly less than sheer criteria, that don’t account for effects for example breed, age and you will sex of your own dogs or environment details . Hence, as well as in look at the fresh new paucity of information towards the issues affecting tick infestations, the purpose of so it experiment were to characterize the latest tick burdens inside the Colombian cows breeds and also to evaluate the dating ranging from tick infestation levels as well as heat flexibility, using both the AI and the THI, under exotic requirements.
Climatic parameters and heat stress 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 receive a life threatening correlation ranging from ages and you will tick burden during the this new Colombian types evaluated. Numerous studies have discover a significant effectation of the age of cattle to your tick load [8, sixteen, 17, 21]. Rehman mais aussi al. and you will Lorusso mais aussi al. located a lowered tick load in lower legs compared to more mature cattle, and you will Asmaa et al. observed a top infestation rate in old pets of various ruminant livestock kinds.
Environmental change features a confident or negative impact on new mental temperature control systems regarding cows and you may potentially towards the tick load of those pets . The greater tick burden used in SM and you will ROMO dogs with an AI > 2 would imply that cows with your state regarding lower flexibility, conveyed of the connection with good thermal pain, enjoys a higher sensitiveness becoming plagued of the clicks. The greater thermal variation of a few pets (with a keen AI