Home → Environment → Animals Loud screamers compensate for small testicles.. It’s a long-held belief that loud mouths overcompensate for something A study has found that monkeys who scream the loudest also tend to have smaller testes and a shortage of sperm compared to their peers Howler monkeys are one of the few nest-building monkeys and one of the loudest creatures in the animal kingdom They generally live in groups of 6-12 individuals with only a few males and many more females Biological anthropologist Jacob Dunn and his team from Cambridge University wanted to see how the size of the monkey testicles plays into social arrangements the team calculated how loud monkeys scream depending on the size of their testicles “The results of our acoustic analyses show that howler monkeys produce roars at a similar frequency as tigers which is far lower than we would have predicted from their body size yet exactly what would be predicted from measuring their giant vocal folds’ which are three times bigger than in a human.” They found that a monkey that weighs approximately 15 pounds (7 kg) can output screams that reach 128 decibels monkeys with smaller testicles scream louder There may actually be a correlation between the two: “It may be that investment in developing a large vocal organ and roaring is so costly that there is simply not enough energy left to invest in testes using a large vocal organ for roaring may be so effective at deterring rival males that there is no need to invest in large testes.” males with small testes and loud screams are more likely to gather a large female following Journal Reference: Evolutionary Trade-Off between Vocal Tract and Testes Dimensions in Howler Monkeys © 2007-2025 ZME Science - Not exactly rocket science © 2007-2025 ZME Science - Not exactly rocket science Nossos serviços estão apresentando instabilidade no momento Algumas informações podem não estar disponíveis 2022 10h00 AM | Last Updated: September 23 Cattle herd hits a record in 2021 and reaches 224.6 million head Cattle herd increased for the third consecutive year and reached the record figure in the time series according to the Municipal Livestock Survey (PPM) The increase of 3.1% in comparison with 2020 caused the number of head to reach 224.6 million the year of 2021 was marked by the retention of female for the production of calves opposite to the decrease in slaughter of cattle due to the lack of animals ready for slaughter São Félix do Xingu (PA) is still the leader Value of livestock production reached R$91.4 billion The value of production of the main agricultural products reached R$91.4 billion Milk production concentrated 74.5% of this amount followed by production of hen eggs (23.9%) the same list as in 2020: Santa Maria de Jetibá (ES) recorded the highest value of production of which 94.1% come from the sales of hen eggs product of which the municipality leads the ranking 95.7% from the same activity as in the previous case Castro (PR) is another municipality in the top 3 It is the main national producer of cow’s milk with 97.3% of the value of production relative to this product (R$901.9) Production of milk is stable and average price records increase of 21% in 2021 Milk production was estimated at 35.3 billion liters in 2021 a figure that shows stability in comparison with the figure in 2020 recorded an increase in production (12.8%) and reached 5.5 billion liters Investments by this sector and better weather conditions observed in the last few years led to the increase of production for the fifth consecutive year despite the decrease of 0.8% in the annual comparison remaied as the origin of the biggest production of milk As for the 5,502 Brazilian municipalities that produced some milk an increase of 4.9% in comparison with 2020 The third municipality was Patos de Minas (MG) It is worthy of mention that seven of the 10 main municipalities regarding milk production were located in Minas Gerais The average price paid for the liter of milk rose 21.0% in 2021 Value of production amounted to R$68.2 billion “The change was mainly an attempt at mirroring the rise of production costs As in the case of milk production and in the ranking of previous years Minas Gerais led the value of milk production an increase of 21.4% against the previous year Raising of hogs and pigs increases and hits record figure; South has half of the national total The number of hogs and pigs increased 3.2% in 2021 the main inventory of hogs and pigs in the time series the year registered historical rises in input prices “That was a challenging situation for producers but slaughter of hogs and pigs was still on an ipward trend and reached record results as for volume and revenue.” The South region is still the main one in terms of animal raising: 21.4 million animals Santa Catarina remains as the leader at state level now followed by Uberlândia (MG) and Rio Verde (GO) the production of hen eggs increased by 1.7% despite the decrease of 4% in relation to the previous year It accounts for 40.4% of the national total The Southeast has states in the first position (São Paulo with 8.5%) and the fifth position (Espírito Santo which makes the South Region as second in the ranking: 22.9% the main five ones are: Santa Maria de Jetibá (ES) Primavera do Leste (MT) and São Bento do Una (PE) and Itanhandu (MG) increased by 3.5% (52.2 million animals) between 2020 and 2021 is number one in the ranking of 5,486 municipalities with the presence of poultry This municipality recorded an increase of 17.8% in 2021 Itaberaí (GO) and Cianorte (PR) surpassed Bastos (SP) and complete the top 5.As for poultry production Santa Maria de Jetibá (ES) is still the leader Primavera do Leste (MT) and Itanhandu (MG) Production of honey is still on an upward trend and hits a record high The national production of honey reached 55.8 thousand tonnes The increase was mainly due to the increases in the South Value of production reached R$ 854.4 million “There is demand and room for increase of this market with rise of the dollar and rise of prices," Ms Rio Grande do Sul is the main producer among Brazilian states followed by Paraná (8.4 thousand) and Piauí (6.9 thousand) These states have led the ranking since 2017 they represent 43.9% of the total Brazilian production Among the 3,991 municipalities that produced honey in 2021 with an estimated production of 925.6 tonnes with the biggest national production (35.4%) and an increase of 4.2% from 2020 with 20.1 thousand tonnes (3.6% of the natonal production) remains as the leader Also relevant are Morada Nova de Minas (MG) tilápia has been the number 1 among fish species tilapia production amounted to 361.3 thousand tonnes or 64.6% of the national production of fish with Paraná leading the state ranking for the species and The second most produced species was tambaqui and 94.6 thousand tonnes (16.9%) of the total fish farming production This species is mainly concentrated in the North both represented 94.2% of the national total Rondônia leads the state ranking once more and accounts for 36.7% of the total tambaqui production Maranhão (12.1%) and Roraima (12.1%) are also important for production Amajari (RO) and Almas (TO) form the top 3 In the third position of fish farming is the group tambacu and tambatinga (7,7% of the total production) Production is distributed among the Central West (58.6%) the Northeast (25.4%) and the North Region (14.7%) which accounted for 54.8% of the national production of these two species with a production of 21% of the total produced which increased for the 4th consecutive year Shrimp farming reached 78.6 million kilos in 2021 which is concentrated in the Northeast (99.7% of the total) has increased for the fourth consecutive time “Every edition of the survey the sector proves to have overcome the crisis caused by the white spot syndrome virus,” says Mariana Oliveira Ceará is the main producer With an increase of 38.3% in production the state has left Rio Grande do Norte (second-placed state) behind and reached 33.7 thousand tonnes or 42.9% of the national total now followed by Acaraú (CE) and Pendências (RN) © 2018 IBGE - Instituto Brasileiro de Geografia e Estatística Nós utilizamos cookies para melhorar sua experiência de navegação no portal. 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