Abundância e sazonalidade de Bothriurus signatus (Arachnida, Scorpiones) em diferentes formações vegetais em São Francisco de Paula, RS, Brasil

Abstract

ABSTRACT. Abundance and seasonality of Bothriurus signatus (Arachnida, Scorpiones) in different vegetal formations in São Francisco de Paula, RS, Brazil. A survey of litter scorpions was conducted in three types vegetation (primary forest, secondary forest and silvicultures) in an area of Araucaria forest in southern Brazil. Pitfall traps were used over 20 months for the sampling of scorpions. A total 165 scorpions of Bothriurus signatus Pocock, 1893 were sampled. Males were more abundant than females and these more abundant than juveniles. The scorpions were more abundant in primary forest and silvicultures than in secondary forest. The activitie peak of scorpions was registered during the spring. The total length of the adult scorpions ranged from 3.05 to 4.52 cm with males significantly larger than females. No pregnant females were registered among collected specimens.KEYWORDS. Seasonality, Neotropical, Scorpions, Araucaria Forest.RESUMO. Foi realizado levantamento de escorpiões em serrapilheira de três tipos de formações vegetais (florestas primárias, florestas secundárias e silviculturas) em área de Floresta com Araucária no Sul do Brasil. Para a coleta foram utilizadas armadilhas de queda ao longo de 20 meses. No total foram amostrados 165 escorpiões de apenas uma espécie identificada como Bothriurus signatus Pocock, 1893. Machos foram mais abundantes que fêmeas e jovens. A espécie foi mais abundante em áreas de floresta primária e silvicultura do que na floresta secundária. A maior atividade dos escorpiões foi registrada durante a primavera. O comprimento total dos escorpiões adultos coletados variou de 3,05 a 4,52 cm sendo que machos foram significativamente maiores que fêmeas. Nenhuma fêmea grávida foi registrada entre os indivíduos coletados.

Scorpions (Arachnida, Scorpiones) at elevated altitudes of an area of conservation in the Caatinga

“…Based on the results of this study, we can infer that this species presents less ecological requirements, especially due to its occurrence throughout almost the entire altitudinal gradient included in this study. Furthermore, 95% of the individuals collected of this species were males, which may indicate a period of reproduction, with this being a key factor responsible for elevating Bothriuridae activity in the soil (ARAÚJO et al, 2010;OTT;OTT, 2014).…”

“…Although it is one of the most representative ecosystems for scorpions, approximately 580 thousand km 2 of the Caatinga has no register of species for this group, representing a very significant gap in data, especially since over 70% of its area is under-sampled (LIRA- DA-SILVA et al, 2005;PORTO et al, 2014;BARROS, 2018). This situation is directly evident through the absence of data related to the ecology and biology of species, registers of endemic elements, such as information on the occurrence and diversity of species found at elevated altitudes (LOURENÇO, 2010;PORTO et al, 2010;OTT;OTT, 2014;LIRA et al, 2019).…”

“…The current knowledge on scorpions at elevated altitudes in Brazil is basic, with a strong lack of data for the Caatinga and many ecosystems across national territory (LOURENÇO; EICKSTEDT, 2009;LOURENÇO, 1988;LIRA et al, 2016;OTT;OTT, 2014).…”

Acúmulo de serapilheira e organismos edáficos em uma unidade de conservação, em Maceió, Alagoas

“…Na Área I, os grupos taxonômicos raros conforme os índices ecológicos mais altos foram: Scorpiones (H = 2,47; e = 1) e Larva de Lepidoptera (H = 2,47; e = 1) (Tabela 3). Os Scorpiones têm preferência por ambiente úmidos e atuam no controle biológico do solo (PODGAISKI et al, 2007;OTT, 2014) e Lepidoptera, em seu estado de larva vivem nas folhas (MONTEIRO et al, 2007). Na Área II os grupos raros encontrados foram Isoptera (H = 2,49; e = 1) e Diplopoda (H = 2,01; e = 0,80) (Tabela 3).…”