RESUMO
Due to the high density of chickens housed within the same space in aviaries, a large volume of organic matter accumulates on the floor. This large supply of available resources allows the development of arthropods, including organisms that affect poultry productivity and health. This study aimed to evaluate the composition of the mite community associated with organic matter in poultry houses with different rearing systems and the verification of potential predators to be evaluated in clean management techniques, such as biological control. The study was carried out in the state of Rio Grande do Sul (Brazil) in a total of six poultry houses, two of the 'Californian' system (SIG) and four of the 'cage free' system (SIF). In total, 839,459 specimens were collected, of which 358,044 were collected from SIF and 481,415 specimens from SIG. Fifty-two species/morphospecies were found and we observed a grouping of aviaries from the same rearing model. Species of medical veterinary importance were found, such as Dermanyssus gallinae, Megninia ginglymura, Ornithonyssus sylviarum and Tyrophagus putrescentiae. The results demonstrate that the organic matter present in the aviaries harbors a high diversity of mites of medical-veterinary importance and predators, which are influenced by the rearing system.
Assuntos
Infestações por Ácaros , Ácaros , Doenças das Aves Domésticas , Animais , Infestações por Ácaros/veterinária , Galinhas , Brasil , Aves DomésticasRESUMO
Tydeid mites have a cosmopolitan distribution and are associated with diverse substrates such as soil, plants, stored products, and animals like vertebrates and insects. Here we report two new species of tydeid mites living inside stingless bee colonies in Brazil. Lorryia meliponarum n. sp. and Melissotydeus bipunctata n. sp. are described and illustrated, and in addition a key to the species of Melissotydeus is presented.
Assuntos
Ácaros , Animais , Abelhas , Brasil , InsetosRESUMO
Many studies have revealed that water mite communities can be affected by the physical and chemical parameters of the water. The similarity between the water mite assemblages in local water bodies and in irrigated rice areas can be a way to measure the water conditions, enabling an assessment of the anthropic impact in the environment. The aim of this study was to evaluate the distribution of water mites in lakes and irrigated rice fields in south Brazil. To accomplish that we characterized the distinctive environments using physical and chemical variables such as pH, turbidity (NTU), water temperature (°C) and dissolved oxygen (mg/L), in order to verify the influence of these abiotic factors on the species composition of water mite communities; and to compare water mite abundance, richness and composition among different habitats. We assessed three native lakes and four sites with irrigated rice cultivation. Our results showed, for the first time in Brazil, strong correlations between the water mite fauna and turbidity. In addition, native lakes were richer and had greater mite abundance when compared with the irrigated rice areas.(AU)
Assuntos
Animais , Ácaros , Características Físico-Químicas da Água/análise , Dinâmica Populacional , Oryza , Irrigação Agrícola , Laguna Costeira , BrasilRESUMO
Many studies have revealed that water mite communities can be affected by the physical and chemical parameters of the water. The similarity between the water mite assemblages in local water bodies and in irrigated rice areas can be a way to measure the water conditions, enabling an assessment of the anthropic impact in the environment. The aim of this study was to evaluate the distribution of water mites in lakes and irrigated rice fields in south Brazil. To accomplish that we characterized the distinctive environments using physical and chemical variables such as pH, turbidity (NTU), water temperature (°C) and dissolved oxygen (mg/L), in order to verify the influence of these abiotic factors on the species composition of water mite communities; and to compare water mite abundance, richness and composition among different habitats. We assessed three native lakes and four sites with irrigated rice cultivation. Our results showed, for the first time in Brazil, strong correlations between the water mite fauna and turbidity. In addition, native lakes were richer and had greater mite abundance when compared with the irrigated rice areas.