Impact of the colonisation of Zaprionus (Diptera, Drosophilidae) in different ecosystems of the Neotropical Region: 2 years after the invasion

Tidon, Rosana; Leite, Denise Ferreira; Leão, Bárbara Ferreira Dobbin

doi:10.1016/s0006-3207(02)00322-1

Cited by 82 publications

(95 citation statements)

References 18 publications

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“…The introduction of invasive species such as Zaprionus indianus, a drosophilid recently introduced into Brazil (VILELA et al, 2001), which has spread rapidly, may have a significant influence on the populations of native species. Although the abundance of this species was not significant during the collection period in the present study, recent data of our laboratory confirm a surprising expansion and abundance of this species in the regions studied (unpublished data) and in other localities (DE TONI et al, 2001;TIDON et al, 2003), which may interfere in population dynamics and favour new evolutionary strategies. Table IV.…”

Section: Resultscontrasting

confidence: 49%

Seasonal variation in natural populations of Drosophila spp. (Diptera) in two woodlands in the State of São Paulo, Brazil

Torres

Madi-Ravazzi

2006

Iheringia, Sér. Zool.

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ABSTRACT. The composition and the seasonality of the natural populations of Drosophila species in relation to the climatic variables temperature and rainfall were analyzed from September 1998 through October 1999 by monthly collections, in two woodlands in the Northwest of the State of São Paulo, Brazil. The diversity dominance component curves were inclined, reflecting low diversity and high dominance of few species. Among the 25 species recorded, Drosophila sturtevanti Duda, 1927 was the most frequent and abundant. On the opposite to data in literature, D. paranaensis Barros, 1950 abundance and frequency were greater than those from D. mercatorum Patterson & Wheeler, 1942. A positive correlation between abundance and rainfall was observed for D. nebulosa Sturtevant, 1916. These data are indicative of changes in the populations structure due to new adaptive strategies arised in response to environmental modifications. Populations are entities in a state of change. Even when the community and the ecosystem appear not to change, the density, mortality, survival, age distribution, growth rate and other attributes of the component populations generally fluctuate, as species adjust constantly to the seasons, physical forces and to each other. Consequently, it is much more revealing to discover in what way and how quickly a given population is changing than what its size and composition may be at a certain moment (ODUM, 1988). KEYWORDS.In the natural world, it is important to distinguish between seasonal changes in the size of a population, largely controlled by seasonal adaptations linked to environmental factors, and annual fluctuations. Annual fluctuations may be considered in two categories: those controlled principally by annual differences in extrinsic factors such as temperature and rainfall, which are beyond the sphere of population interactions, and intrinsic factors, oscillations controlled principally by population dynamics, like biotic factors, such as the availability of food or energy. In many cases, year-on-year changes in abundance appear to be clearly correlated to variation in one or more of the principle extrinsic limiting factors, but some species maintain such a regular relative abundance, apparently irrespective of obvious environmental factors, that the term "cycles" appears to be appropriate. Species that have such a regular variation in population size are often described as "cyclical". Populations modify and compensate for the perturbations of physical factors, thus, the more organized and mature the community, or the more stable the physical environment, or both, the less will be the amplitude of the fluctuations in population density over time (KREBS, 1985).According to BRNCIC et al. (1985) the seasonality of each species in the natural world is the result of a long and continuous process of adaptation to environmental conditions in which the species usually lives.Flies of the Drosophila genus are appropriate for the study of population fluctuation, as they are insects highly sensitive to ...

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Section: Resultscontrasting

confidence: 49%

Seasonal variation in natural populations of Drosophila spp. (Diptera) in two woodlands in the State of São Paulo, Brazil

Torres

Madi-Ravazzi

2006

Iheringia, Sér. Zool.

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“…1 to 3). The abundance of this fl y in mangrove forests was higher than in the Atlantic Rain Forest, but lower than in the Cerrado (Tidon et al 2003) or in urban environments (Ferreira & Tidon 2005, Silva et al 2005. It is interesting to compare Z. indianus with D. simulans, the two most common species in urban areas of Santa Catarina Island (M. Gottschalk, personal communication).…”

Section: Subfamily Drosophilinaementioning

confidence: 99%

“…Soon after, the species was found in the southern states of Santa Catarina (De Toni et al 2001) and Rio Grande do Sul (Castro & Valente 2001), as well as in the Cerrado, Central Brazil (Tidon et al 2003), in the northern state of Pará (M. Martins, personal communication), and in Uruguay (Goñi et al 2001). In fact, this fl y became one of the most abundant species of drosophilids in open and disturbed areas (Tidon et al 2003, Silva et al 2005. In the present work, we collected 4,401 individuals of Z. indianus, about 5% of the total sample (Figs.…”

Section: Subfamily Drosophilinaementioning

confidence: 99%

Taxonomic survey of Drosophilidae (Diptera) from mangrove forests of Santa Catarina Island, Southern Brazil

Schmitz¹,

Valente²,

Hofmann³

2007

Neotrop. Entomol.

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“…The first record of Z. indianus in Brazil was in late 1998 (Vilela, 1999) and, since this date, the species has increased its range very rapidly, being now found from the Equator (Belem) up to Uruguay (Goñ i et al, 2001). Z. indianus is now very common in cultures and domestic habitats, and may be a pest for fig cultures (Vilela, 1999;Tidon et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Quantitative trait analysis and geographic variability of natural populations of Zaprionus indianus, a recent invader in Brazil

David

Araripe²,

Bitner‐Mathé

et al. 2005

Heredity

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Five natural samples of a recent South America invader, the drosophilid Zaprionus indianus, were investigated with the isofemale line technique. These samples were compared to five African mainland populations, investigated with the same method. The results were also compared to data obtained on mass cultures of other populations from Africa and India. Three quantitative traits were measured on both sexes, wing and thorax length and sternopleural bristle number. We did not find any latitudinal trend among the American samples, while a significant increase in body size with latitude was observed in the Indian and, to a lesser degree, in the African populations. American populations were also characterized by their bigger size. Genetic variability, estimated by the intraclass correlation among isofemale lines, was similar in American and African populations. The intraline, nongenetic variability was significantly less in the American samples, suggesting a better developmental stability, the origin of which is unclear. A positive relationship was evident between intraline variability of size traits and the wing-thorax length correlation. Altogether, our data suggest that the colonizing propagule introduced to Brazil had a fairly large size, preventing any bottleneck effect being detected. The big body size of American flies suggests that they came from a high-latitude African country. The lack of a latitudinal cline in America seems to be related to the short time elapsed since introduction. The very rapid spread of Z. indianus all over South America suggests that it might rapidly invade North America.

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Impact of the colonisation of Zaprionus (Diptera, Drosophilidae) in different ecosystems of the Neotropical Region: 2 years after the invasion

Cited by 82 publications

References 18 publications

Seasonal variation in natural populations of Drosophila spp. (Diptera) in two woodlands in the State of São Paulo, Brazil

Seasonal variation in natural populations of Drosophila spp. (Diptera) in two woodlands in the State of São Paulo, Brazil

Taxonomic survey of Drosophilidae (Diptera) from mangrove forests of Santa Catarina Island, Southern Brazil

Quantitative trait analysis and geographic variability of natural populations of Zaprionus indianus, a recent invader in Brazil

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