Vocal repertoires and call structure can provide insights into the behaviour and evolution of species, as well as aid in taxonomic classification. Nocturnal primates have large vocal repertoires. This suggests that acoustic communication plays an important role in their life histories. Little is known about the behavioural context or the intraspecific variation of their vocalisations. We used autonomous recording units and manual recorders to investigate the vocal behaviour and structure of loud calls of the small-eared greater galago (Otolemur garnettii)in Kenya and Tanzania. We describe the vocal repertoire, temporal calling patterns and structure of 2 loud calls of 2 subspecies: O. g. panganiensis and O. g. kikuyuensis. We found considerable intraspecific structural differences in both loud calls. These are congruent with the current subspecies classification. Differences in vocalisations among populations are not consistent with the "acoustic adaptation hypothesis," rather they are likely a result of geographic variation due to isolation caused by vegetational barriers in southern Kenya.

I've been to a lot of countries. Studied in Russia and around 2017 the country enacted a law that prohibits public preaching or passing religious pamphlets and any other related materials in public. The only noise that reminds you about a church is the noise that comes from their orthodox church bells otherwise the streets feel very secure without the unnecessary noise and commotion pelt by uncouth and capitalist built churches. Also someone explain why mosques still find it useful to install those loud speakers wherea's most people can set alarms on their phones for the same.


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Article 42 (a) of the Kenyan Constitution says: "Every person has the right to a clean and healthy environment, which includes the right to have the environment protected for the benefit of present and future generations through legislative and other measures." Article 70 of the Constitution says that a complainant does not have to prove any loss or injury suffered for the grievance to be declared valid in court.googletag.cmd.push(function(){googletag.display('div-gpt-ad-1616649507079-0');});Article 70 (1) of the Constitution says: "If a person alleges that a right to a clean and healthy environment recognised and protected under Article 42 has been, is being or is likely to be, denied, violated, infringed or threatened, the person may apply to a court for redress in addition to any other legal remedies that are available in respect to the same matter." Sub-section 3 of Article 170 says: "An applicant does not have to demonstrate that any person has incurred loss or suffered injury." On Wednesday, October 12, journalist Trevor Ombija drew public criticism when he asked to soundproof the house of a Kileleshwa resident who had complained about noise pollution from a restaurant linked to the media personality. Emma Too, a model, had complained that Samaki Samaki Seafood and Jazz restaurant located on Othaya Road, adjacent to her apartment, played loud music, causing her sleepless nights. Too said she tried in vain to reach out to the shareholders of the restaurant, Trevor Ombija included.googletag.cmd.push(function(){googletag.display('div-gpt-ad-1616649342883-1');});According to her, her complaint was about the loud music that could be resolved by having the restaurant play its music at a lower volume. Instead of doing that, Too said, Ombija suggested that Samaki Samaki soundproofs her house upon getting a permit from the Nairobi County Government and the apartment landlord's approval.window._taboola=window._taboola||[];_taboola.push({mode:"thumbnails-mid",container:"taboola-mid-article-thumbnails",placement:"Mid Article Thumbnails",target_type:"mix"}); Ombija further said in a meeting with restaurant owners and residents on Tuesday that "complaints have to surpass half of the area's occupancy for them to be valid". The law refutes this claim. Article 170(3) of the Constitution suggests that even just one complaint is enough for it to be valid. The Nairobi City County Public Nuisance Act 2021 says residents have a right to a quiet environment, regardless of the nature of businesses around. googletag.cmd.push(function(){googletag.display("div-gpt-ad-1616649387179-0");}); Section 20 of the Act states: "A person shall not in any street or in any shop, business premises or any other place adjoining any street to which the public are admitted, play, operate, cause or allow to be played or operated, any musical instrument, wireless, gramophone, amplifier or similar instrument thereby making, causing or authorising noise to be made which is loud and continuous, or repeated as to constitute a nuisance to the occupants or dwellers of any premises in the neighbourhood or to passersby on the street." The law further protects Nairobians in residential areas against public nuisance. Stay informed. Subscribe to our newsletter

Interpretive Summary: Grain storage pests cause $4 billion annually in losses in subsaharan Africa. Scientists at Purdue University, University of Florida, Conseil Quest et Centre Africain pour la Recherche et le Dveloppement Agricoles, Dakar, Senegal, and at the USDA/ARS, Center for Medical, Agricultural and Veterinary Entomology in Gainesville, Florida, conducted acoustic, pitfall trap, and visual surveys of the population levels of the maize weevil larger grain borer, and red flour beetle in five warehouses in Kenya. The results demonstrate that acoustic technology is useful for targeting pest infestations in Kenyan warehouses, although precautions are necessary to avoid monitoring at times when background noise levels are too loud.

Like other nocturnal primates, many species of galago (Galagidae) are phenotypically cryptic, making their taxonomic status difficult to resolve. Recent taxonomic work has disentangled some of the confusion. This has resulted in an increase in the number of recognised galago species. The most widespread galago species, and indeed the most widespread nocturnal primate, is the northern lesser galago (Galago senegalensis) whose geographic range stretches >7,000 km across Africa. Based on morphology, 4 subspecies are currently recognised: G. s. senegalensis, G. s. braccatus, G. s. sotikae and G. s. dunni. We explore geographic and subspecific acoustic variation in G. senegalensis, testing three hypotheses: isolation by distance, genetic basis, and isolation by barrier. There is statistical support for isolation by distance for 2 of 4 call parameters (fundamental frequency and unit length). Geographic distance explains a moderate amount of the acoustic variation. Discriminant function analysis provides some degree of separation of geographic regions and subspecies, but the percentage of misdesignation is high. Despite having (putative) parapatric geographic ranges, the most pronounced acoustic differences are between G. s. senegalensis and G. s. dunni. The findings suggest that the Eastern Rift Valley and Niger River are significant barriers for G. senegalensis. The acoustic structures of the loud calls of 121 individuals from 28 widespread sites are not significantly different. Although this makes it unlikely that additional unrecognised species occur within G. senegalensis at the sites sampled, vast areas of the geographic range remain unsampled. We show that wide-ranging species do not necessarily exhibit large amounts of variation in their vocal repertoire. This pattern may also be present in nocturnal primates with smaller geographic ranges. e24fc04721

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