Predação de sementes de Allagoptera arenaria (Gomes) O'Kuntze (Arecaceae) por Pachymerus nucleorum Fabricius (Coleoptera, Chrysomelidae, Bruchinae)

Grenha, Viviane; Macêdo, Margarete Valverde de; Monteiro, Ricardo Ferreira

doi:10.1590/s0085-56262008000100009

Cited by 31 publications

(35 citation statements)

References 15 publications

(14 reference statements)

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“…Additionally, the continuous production of A. vitrivir fruits guarantee stocks of new fruits (mature and intact) on the ground throughout the year, so that if P. cardo females had a preference for ovipositing only on recently dispersed fruits they could do so continually. Similar results were reported by Grenha et al (2008) for Allagoptera arenaria (Arecaceae), where the continuous production of fruits, even with fruiting peaks, did not generate variation in predation rates by P. nucleorum.…”

Section: Discussionsupporting

confidence: 87%

“…Acrocomia aculleata, A. speciosa, and Syagrus oleracea, which grow up to 10 m in height, likewise demonstrated seed predation by P. nucleurum (a congeneric species) only in the post-dispersal phase (Garcia et al 1980;Scariot 1998). However, Silvius & Fragoso (2002) and Grenha et al (2008) reported seed predation in the shorter palms (approximately 2 m tall) Bactris acanthocarpa and Allagoptera arenaria (Arecaceae) (Dasyprocta spp. ; Dasyproctidae) (Guix 2006).…”

Section: Discussionmentioning

confidence: 99%

“…As such, it is possible that there is, in fact, seasonal variation in predation as was reported by Silvius & Fragoso (2002), who observed the predation rate of P. cardo on A. maripa to vary from 60 to 94 %, during the dry and rainy seasons, respectively. Attalea phalerata fruits exposed for eight months, including the rainy season, demonstrated 60 % predation by P. cardo (Castro & Roldan 2001), although A. arenaria, which also demonstrated continuous fruiting, suffered 20.6 % predation by P. nucleurum (Grenha et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…However, many show high specificity for certain plants (Janzen 1980), or what is termed taxonomic conservatism in host-plant use. Pachymerus nucleorum and Pachymerus cardo, both belong to the Chrysomelidae, subfamily Bruchinae, tribe Pachymerini (Grenha et al 2008). According to Johnson et al (1995), species of the tribe Pachymerini feed almost exclusively on palm seeds, and are commonly known as palm-beetles.…”

Section: Introductionmentioning

confidence: 99%

“…The palms Attalea maripa (Guix 2006), Attalea phalerata (Castro & Roldan 2001), Acrocomia aculeate (Scariot 1998), and Syagrus oleracea (Garcia et al 1980) all grow to heights of more than 10 m,and seed predation has only been observed after dispersal. The palms Allagoptera arenaria (Grenha et al 2008) and Bactris acanthocarpa (Silva & Tabarelli 2001), however, produce bunches of fruits that are held very close to the ground and are predated on by the same beetles both before and after dispersal, suggesting that plant height influences predation.…”

Section: Introductionmentioning

confidence: 99%

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Do fruit morphology and scarification affect germination and predation rates of Babassu seeds?

et al. 2016

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Seed predation is a natural phenomenon that can occur either before or after dispersal and can signifi cantly reduce the economic value and reproductive potential of plants. Th e babassu palm (Attalea vitrivir, Arecaceae) is important to rural communities that extract oil from its fruits for a wide variety of uses. We evaluated the predation and germination of A. vitrivirseeds in Pandeiros River Environmental Protection Area (EPA-Pandeiros) in Minas Gerais State, Brazil. Sixty individual plants were evaluated to determine their fruiting patterns. Seed predation and germination were evaluated in the natural environment for eight months for fruits divided into two treatments: scarifi ed and intact. Germination of fruits submitted to these same treatments was also evaluated under greenhouse conditions. Our results indicated that fruiting is continuous in this species and that fruit morphology does not infl uence either germination or predation. Likewise, fruit scarifi cation did not infl uence seed germination. Pachymerus cardo (Coleoptera: Chrysomelidae) preferentially oviposited on scarifi ed fruits, but only after their dispersal. Th e predation rate in the natural environment was 14.6%. Germination was not observed under natural conditions, but reached 33.05% under greenhouse conditions.

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Section: Discussionsupporting

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Do fruit morphology and scarification affect germination and predation rates of Babassu seeds?

et al. 2016

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Natural Vs Managed Habitat: Effect Over the Seed-Predator Pachymerus nucleorum and Its Natural Enemies

et al. 2019

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The licuri palm, Syagrus coronata (Martius) Beccari (Arecaceae), is widely distributed throughout the Brazilian Caatinga and has high cultural, socioeconomical, and ecological importance. The palm tree logging is prohibited by the Brazilian law, and thus isolated individuals are a common sight on managed pastures in the Brazilian semi-arid region. We aimed to compare the insect seed-predator Pachymerus nucleorum (Fabricius) (Bruchinae) abundance and its predation levels on S. coronata seeds between managed (pasture) and natural (Caatinga vegetation) habitats. We also monitored the parasitoid Heterospilus prosopodis (Viereck) (Braconidae) abundance and other P. nucleorum potential natural enemies (generalist predators and microhymenopterans). We tested the hypothesis that more complex and heterogenous habitats (i.e., with higher plant diversity) support higher abundance of potential P. nucleorum natural enemies. For such, we collected 600 fruits from each habitat and evaluated the seed predation level by P. nucleorum, as well as the P. nucleorum parasitism by H. prosopodis. The P. nucleorum abundance and its potential natural enemies were estimated using 122 sticky traps placed on the S. coronata individuals' crown. Neither the P. nucleorum and generalist predators abundance differed between habitats, whereas the H. prosopodis and microhymenopterans abundance was higher in the natural habitat. Consequently, P. nucleorum parasitism levels by H. prosopodis were also higher in the natural habitat. Our study indicated that habitat with higher plant diversity supported more natural enemies, thus confirming that increased habitat homogenization leads to decreased parasitism levels by the less parasitoids number in managed habitats. Our results may subsidize conservationist management practices in the managed habitats aiming to improve fruit exploitation techniques sustainability and land-use practices, which would thereafter allow for the S. coronata population conservation in the Brazilian Caatinga.

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Land-cover change and effects at the local scale on pre-dispersal seed predation by Pachymerus nucleorum (Bruchinae) in the tropical palm Syagrus coronata (Arecaceae)

Ferreira

Silva

Nascimento

et al. 2022

Forest Ecology and Management

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Predação de sementes de Allagoptera arenaria (Gomes) O'Kuntze (Arecaceae) por Pachymerus nucleorum Fabricius (Coleoptera, Chrysomelidae, Bruchinae)

Cited by 31 publications

References 15 publications

Do fruit morphology and scarification affect germination and predation rates of Babassu seeds?

Do fruit morphology and scarification affect germination and predation rates of Babassu seeds?

Natural Vs Managed Habitat: Effect Over the Seed-Predator Pachymerus nucleorum and Its Natural Enemies

Land-cover change and effects at the local scale on pre-dispersal seed predation by Pachymerus nucleorum (Bruchinae) in the tropical palm Syagrus coronata (Arecaceae)

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