DSpace Communidade:https://repositorio.uema.br/jspui/handle/123456789/20092026-04-20T19:42:08Z2026-04-20T19:42:08ZOcorrência e caracterização dos habitats de Aedes aegypti (Linnaeus, 1762) e Aedes albopictus (Skuse, 1894) nos períodos seco e chuvoso, no povoado Barriguda, zona rural do município de Caxias, Maranhãohttps://repositorio.uema.br/jspui/handle/123456789/60422026-04-17T15:20:24Z2026-07-18T00:00:00ZTítulo: Ocorrência e caracterização dos habitats de Aedes aegypti (Linnaeus, 1762) e Aedes albopictus (Skuse, 1894) nos períodos seco e chuvoso, no povoado Barriguda, zona rural do município de Caxias, Maranhão
Abstact: Aedes aegypti (Linnaeus, 1762) and Aedes albopictus (Skuse, 1894) are vectors of important arboviruses such as dengue fever, Zika fever and chikungunya fever,which cause serious public health problems worldwide. The aim was to verify the occurrence, characteristics and habitat location of A. aegypti and A. albopictus in residential and wild areas in dry and wet seasons in the village of Barriguda, rural area of Caxias, Maranhão. The collection of juveniles and alates was carried out in 20 residences, ten of them on the
sides of MA 034 and ten residences closest to areas with denser vegetation in the dry season (September to December 2022) and in the wet season (January to April 2023). A
total of 677 specimens of A. aegypti and A. albopictus larvae and pupae were collected, with the highest frequency in December(297; 43.9%)followedby February (156; 23%). A. aegypti scored higher positivity with 537 compared to A. albopictus; 79.3%. Thirteen positive containers were found with immature A. aegypti and A. albopictus, with the highest positivity in the water storage group at 71.4% in the dry season and 50% in the wet season, with the frequency in buckets (75%) being higher. Juveniles in plasticbuckets (46.1%) and rubber tires (38.5%) predominated, most of them in the shade (61.5%) and with organic material (leaf debris and moss) (92.3%). Ten winged specimens were
collected, eight A. aegypti and two A. albopctus, five were found in space, and seven
specimens were collected with a height of 0–50 cm. This study made it possible to obtain
data on the behavior of the vectors A. aegypti and A. albopictus, which can help fight
these vectors and thus reduce the spread of arboviruses, including dengue fever2026-07-18T00:00:00ZDiversidade e distribuição das espécies de Ranatra Fabricius, 1790 (Hemiptera: heteroptera: nepidae) do estado do Maranhão, Brasilhttps://repositorio.uema.br/jspui/handle/123456789/60412026-04-17T14:34:37Z2023-07-17T00:00:00ZTítulo: Diversidade e distribuição das espécies de Ranatra Fabricius, 1790 (Hemiptera: heteroptera: nepidae) do estado do Maranhão, Brasil
Abstact: Representatives of Ranatra Fabricius (Nepidae) are predatory water insects and are popularly called water scorpions because they have a breathing siphon at the rear end of their abdomen (seventh abdominal section). These insects live on vegetation, particularly associated with aquatic macrophytes and submerged roots on the banks of Lentic and Lotic waters. Ranatra includes about 120 species distributed worldwide, 35 of which are known from Brazil. However, there are no records for Maranhão or for the NE region as a whole, indicating a gap in the taxonomic and distributional knowledge of this group in the region. The aim of this work was therefore to know the diversity of Ranatra species present in Maranhão, to map the points of their distribution and to establish an identification key for the species from Maranhão. The samples were collected using a D (Rapiché) aquatic entomological network with a mesh size of 1 mm and by active searching day and night in different substrate types near the banks of water bodies. The collected samples were fixed in 80% alcohol and stored at the Aquatic Entomology Laboratory (LEAq) at UEMA, Campus Caxias. One specimen of each species was photographed and the diagnostic characters are presented for comparison. Distribution maps
have been produced showing historical and new distribution records for each species. The male of R. mixta has been described and illustrated and a key to identifying the species present in the
state has been established. A total of 138 specimens were identified, 73 males and 65 females distributed across eight species: Ranatra costalimai, R. doesburgi, R. macrophthalma, R. mediana, R. mixta, R. parvula, R. rabida and R. sarmentoi all set new records for Maranhão and the last new record for Brazil and distribution gaps across the genus can be closed, thus contributing to future work related to the group.2023-07-17T00:00:00ZOdiníideos (diptera, odiniidae) da floresta nacional de Palmares Altos, Piuaí, Brasilhttps://repositorio.uema.br/jspui/handle/123456789/60402026-04-17T14:03:17Z2023-07-17T00:00:00ZTítulo: Odiníideos (diptera, odiniidae) da floresta nacional de Palmares Altos, Piuaí, Brasil
Abstact: Odiniidae is a family of flies characterized by the presence of strong bristles, primarily
on the head and thorax, occurring in all zoogeographic regions, including Australia.
The family is small, currently composed of 81 valid species distributed among 18
genera and two subfamilies, Odiniinae and Traginopinae. The general objective of
this study was to conduct a comprehensive inventory of the odiniid fauna in Palmares
National Forest (FLONA de Palmares). A total of 224 specimens were collected and
analyzed, representing seven species and seven genera, four of which are newly
discovered in the field of science: Odinia surumuana Prado, Helgreelia sp. nov,
Schildomyia reticulata Prado, Gen. nov, sp. nov. A; Gen. nov, sp. nov. B; Gen.
nov, sp. nov. C; and Gen. nov, sp. nov. D. The species documented in this study
represent new records for the study area and for the state of Piauí2023-07-17T00:00:00ZEfeitos biológicos da poluição hídrica do Rio Itapecuru na cidade de Caxias-MAhttps://repositorio.uema.br/jspui/handle/123456789/60352026-04-15T13:13:12Z2023-07-13T00:00:00ZTítulo: Efeitos biológicos da poluição hídrica do Rio Itapecuru na cidade de Caxias-MA
Abstact: Currently, there is a serious water crisis caused by anthropogenic issues. It is extremely
important to understand how anthropic activities influence the quality of aquatic ecosystems from the perspective of restoring degraded ecosystems, aiming to restore their ecological integrity. The objective of this work research was to analyze the biological effects of water pollution in the Itapecuru river in the city of Caxias-Ma. For the collection of water samples, five points were chosen, being described in P1, P2, P3, P4 and P5, from the upstream downstream on the banks of the Itapecuru river. The collections were made in two periods, between “November and December” and the rainy period “May”. The water samples were taken to the Physical-Chemistry Laboratory of SAAE (Autonomous Water and Sewage Service) for physical-chemical analysis. Subsequently, microbiological tests were carried out using the Multiple Tubes method, and the genotoxic test using Allium cepa as bioindicator. The waters of the Itapecuru River are polluted in the collected areas. They had a high iron content, yellowish color and turbidity in both analyzed periods. The microbiological test showed the presence of microorganisms such as bacteria and fungi. Despite the absence of heavy metals and chromosomal alterations (genotoxicity) in the analyzed water, the possibility of its toxic potential is not ruled out2023-07-13T00:00:00Z