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13 results for “Sweat bee”
Figures 1 in Two new records of sweat bees genus Nomia (Hymenoptera: Halictidae) from Uttarakhand, India
Figures 1. Glimpse of Habitats in Dehradun Valley, Uttarakhand. (a) Forest habitat, (b) Mountainous peaks, (c) Riverine habitat, (d) Agricultural field.
Figure 2 in Two new records of sweat bees genus Nomia (Hymenoptera: Halictidae) from Uttarakhand, India
Figure 2. Nomia crassipes (Fabricius, 1789).
Figure 3. Nomia iridescens Smith, 1857 in Two new records of sweat bees genus Nomia (Hymenoptera: Halictidae) from Uttarakhand, India
Figure 3. Nomia iridescens Smith, 1857.
The significance of genetic distance and nest occupation on the worker-worker similarity of gut bacterial microbiome and cuticular hydrocarbon profile in a sweat bee
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Data from: Phenological, but not social, variation associated with climate differences in a eusocial sweat bee, Halictus ligatus, nesting in southern Ontario
Studies of annual and geographic variation in eusocial bee populations suggest that more stringent environmental conditions result in stronger reproductive skew favouring queens, while moderate conditions favour increasing worker reproduction. To test these predictions, we compared the phenology and colony development of H. ligatus nesting in St. Catharines, Ontario, Canada to a previously studied aggregation 90 km north of St. Catharines, in Victoria, Ontario. Despite the close proximity of these two locations, St. Catharines has markedly shorter winters and longer summers. Comparisons between St. Catharines in 2006 and Victoria in the 1980s and 1990s incorporate both geographic differences in climate and temporal differences due to climate change. We predicted that St. Catharines foundress queens should emerge from hibernation and initiate nests earlier in spring, giving them time to produce more workers. Since earlier studies indicated that queens have difficulty suppressing worker reproduction in larger colonies, we also predicted higher rates of worker ovarian development in St. Catharines. In spring and summer 2006, we excavated 65 H. ligatus nests, comparing their contents to 713 specimens collected in pan traps. As predicted, nests were initiated about a month earlier in St. Catharines than in Victoria, but contrary to prediction, fewer workers were produced in St. Catharines. St. Catharines workers were just as likely to have developed ovaries as Victoria workers. About 40% of St. Catharines workers were classified as reproductive, and larger reproductive workers tended to have higher ovarian scores. Early queen mortality in the longer nest cycle of St. Catharines bees may have enhanced opportunities for worker reproduction despite their smaller numbers. Novel features of H. ligatus sociobiology in St. Catharines included evidence that queens can initiate new nests following the loss of their first brood, overlap between worker and gyne production within some nests, and high rates of independent nest founding by worker-sized females, suggesting that many worker-brood females overwinter. Overall, the distinctly warmer climate of St. Catharines compared to Victoria led to earlier nest initiation and lengthening of the flight season, but not to the predicted differences in colony social organisation or queen-worker reproductive skew. A second objective of our study was to assess how well pan trap collections capture important information about demographic and social parameters important in assessing social variability in sweat bees. Nest excavations and pan traps produced similar results, suggesting that pan traps are a good alternative when nest excavations are impossible.
Fig. 2 in Sympatric lineage divergence in cryptic Neotropical sweat bees (Hymenoptera: Halictidae: Lasioglossum)
Fig. 2 Phylogenetic tree constructed with maximum likelihood (bootstrap support on the left, Bayesian posterior probabilities on the right) showing the relationships between molecular operational taxonomical units (mOTUs). The coloured bars show the mOTU designations by the four methods of species delimitation: ABGD Automatic Barcode Gap Discovery; stGMYC single threshold General Mixed Yule Coalescent; bGMYC Bayesian General Mixed Yule Coalescent; BIN Barcode Index Number with refined single linkage analysis (RESL)
Fig. 3 in Sympatric lineage divergence in cryptic Neotropical sweat bees (Hymenoptera: Halictidae: Lasioglossum)
Fig. 3 Principal coordinate analysis (PCoA) of ten microsatellite loci and 13 individuals per mOTU. The colours represent mOTUs as in Fig. 2
Fig. 5 in Sympatric lineage divergence in cryptic Neotropical sweat bees (Hymenoptera: Halictidae: Lasioglossum)
Fig. 5 STRUCTURE analyses for the two most abundant mOTUs (mOTU1 and mOTU7): mOTU1 with 135 individuals (K = 7) and mOTU7 with 141 individuals (K = 8); the phylogeny resembles Fig. 2.
Data from: Age-related mushroom body expansion in male sweat bees and bumble bees
<p>A well-documented phenomenon among social insects is that brain changes occur prior to or at the onset of certain experiences, potentially serving to prime the brain for specific tasks. This insight comes almost exclusively from studies considering developmental maturation in females. As a result, it is unclear whether age-related brain plasticity is consistent across sexes, and to what extent developmental patterns differ. Using confocal microscopy and volumetric analyses, we investigated age-related brain changes coinciding with sexual maturation in the males of the facultatively eusocial sweat bee, <i>Megalopta genalis,</i> and the obligately eusocial bumble bee, <i>Bombus impatiens</i>. We compared volumetric measurements between newly eclosed and reproductively mature males kept isolated in the lab. We found expansion of the mushroom bodies—brain regions associated with learning and memory—with maturation, which were consistent across both species. This age-related plasticity may, therefore, play a functionally-relevant role in preparing male bees for mating, and suggests that developmentally-driven neural restructuring can occur in males, even in species where it is absent in females.</p>
Data from: Sweat bees on hot chillies: provision of pollination services by native bees in traditional slash-and-burn agriculture in the Yucatán Peninsula of tropical Mexico
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Data from: Age-related mushroom body expansion in male sweat bees and bumble bees
Open the record for dataset details and reuse information.
Data from: Phenological, but not social, variation associated with climate differences in a eusocial sweat bee, Halictus ligatus, nesting in southern Ontario
Open the record for dataset details and reuse information.
Fig. 4 in Sympatric lineage divergence in cryptic Neotropical sweat bees (Hymenoptera: Halictidae: Lasioglossum)
Fig. 4 NMDS analysis of morphological data. Means and standard deviations are shown for each of the 8 mOTUs from the analysis of 30 morphological traits in the Lasioglossum taxa. Colours represent mOTUs as in Fig. 2
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