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MÁRCIO R. VELOSO FRANCELINO ADRIANA DE LIMA MENDONÇA RUTH R. DO NASCIMENTO FERNANDO A. C. DE MENDONÇA EDLEIDE L. DA SILVA MARIA DO ROSÁRIO T. DE FREITAS CYRO R. CABRAL JR CARLOS EDUARDO DA SILVA JOSÉ H. S. RIBEIRO ANTÔNIO EUZÉBIO G. SANTANA 《Physiological Entomology》2008,33(1):37-42
Abstract. Ethological studies are conducted under laboratory conditions using workers of Atta sexdens sexdens and Atta opaciceps collected from field colonies to investigate the mechanisms involved in the alarm response and intra-specific recognition in leaf-cutting ants. Hexane extracts from the heads of gardeners and generalist workers elicit higher levels of alarm response in foragers from the same colony than do mandibular gland extracts from foragers and soldiers, indicating that gardeners, generalists and foragers are primarily responsible for the production of alarm pheromone. Foragers subjected to extracts from non-nestmates exhibit significantly greater alarm responses than are induced by similar extracts derived from nestmate workers, suggesting that the alarm pheromone may have a role in nestmate recognition. 相似文献
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THIERRY BACKELJAU CARLOS P. DE BRITO REGINA M. TRISTÃO DA CUNHA ANTONIO M. FRIAS MARTINS LUC DE BRUYN 《Biological journal of the Linnean Society. Linnean Society of London》1992,46(1-2):131-143
Thirty specimens of Arion intermedins from Flores (and Corvo) were electrophoretically (PAGE) assayed for 11 enzymes, yielding information about 14 putative loci in two colour morphs of this species. One of these colour variants was tentatively identified as A. pascalianus (P morph). Except for the Mdh locus, all loci in A. intermedins sensu lato from Flores were monomorphic. Mdh , however, was diallelic for Mdh100 and Mdh122 . This latter electromorph was absent in A. intermedins sensu stricto from Flores, but present in the P morph and A. intermedins from Belgium. As a consequence A. intermedins sensu lato from Flores consists of two genetic strains defined by the Mdh alleles. The genetic identity between these strains (7) is 0.929. The genetic identity between the P morph and A. intermedins sensu stricto in Flores is 0.951, while between the P morph and Belgian A. intermedins it is 0.973. These values suggest that the supposed A. pascalianus from Flores is only a colour morph of A. intermedins. This paper also provides the first published record of this species from the island of Corvo. 相似文献
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REGINA CÉLIA ZONTA DE CARVALHO ROGER L. BLACKMAN FLS JENNIFER M. SPENCE 《Zoological Journal of the Linnean Society》1998,123(2):117-141
Uroleucon is one of only two genera of Aphidinae to have undergone significant speciation in South America, with a group of about 14 endemic, morphologically similar species feeding on native Compositae, especially Baccharis . Multivariate morphometrics (canonical variates analysis, CVA) was used to discriminate between these species and compare them with the North American subgenus Lambersius , in which most of them have hitherto been placed. It is concluded that they probably form a separate monophyletic group. Four new species are described in this group— brevisiphon, essigi, petrohuense and pseudomuennosum— and five names are placed in synonymy. Of the other species of Uroleucon in South America, U. lizerianum is widespread and feeds on many species of native and introduced Compositae; it is morphometrically inseparable from the North American species U. ambrosiae and is probably an introduced form of that species, but has consistently fewer secondary rhinaria. A key is provided to the 19 available species of Uroleucon recorded from South America. 相似文献
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A new Swartzia (Leguminosae: Papilionoideae: Swartzieae) species with trimorphic stamens from Amazonian Brazil 总被引:1,自引:0,他引:1
VIDAL DE FREITAS MANSANO ANA LUCIA DE SOUZA 《Botanical journal of the Linnean Society. Linnean Society of London》2005,147(2):235-238
A new species Swartzia trimorphica Mansano & A. L. Souza (Leguminosae, Papilionoideae, Swartzieae) from the Amazonian Brazil, is described and illustrated. The new species is notable and distinct from all the other species of Swartzia by its highly unusual trimorphic stamens, while the other species have either an isomorphic or a dimorphic androecium. The new species is included in the section and subsection Swartzia , ser. Orthostylae based on its bracteolate pedicels, the cauligerous inflorescences, lateral style and the relative size of the ovary compared to the style. The atypically small gynoecium in the material suggests the possibility that flowers may be functionally unisexual. Field observations and more collections are needed to resolve this question. © 2005 The Linnean Society of London, Botanical Journal of the Linnean Society , 2005, 147 , 235–238. 相似文献
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DANILO B. RIBEIRO ANDRÉ V. L. FREITAS 《Biological journal of the Linnean Society. Linnean Society of London》2011,104(4):820-827
Animal species have a restricted period during the year when conditions for development are optimal, and this is known as the temporal window. Duration of the temporal window can vary among species, although the causes of variation are still poorly understood. In the present study, examining butterflies, we assume that the temporal window duration is correlated with the seasonal period of flight (termed seasonality). To understand how species characteristics are correlated with this, we examine whether there is a relationship between body size and length of flight period of fruit‐feeding butterflies in forest fragments, and whether these two parameters have a phylogenetic signal. Using wing size as a measure of body size and the period of adult flight as a measure of seasonality, we found significant positive correlations between body size and seasonality among subfamilies but not within subfamilies. We also found a clear phylogenetic signal in size but not in seasonality. The results obtained suggest the existence of a trade‐off between insect size and seasonality, with size limiting flight period length. The relationship between body size and seasonality and the synchrony with their resources may be one factor explaining the vulnerability of large insects to forest fragmentation. © 2011 The Linnean Society of London, Biological Journal of the Linnean Society, 2011, 104 , 820–827. 相似文献
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Acclimation of metabolism to light in Arabidopsis thaliana: the glucose 6‐phosphate/phosphate translocator GPT2 directs metabolic acclimation 下载免费PDF全文
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