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222 results for “Nectar”
FIGURE 5 in New Genus and Species of Nectar-Feeding Bat from the Atlantic Forest of Southeastern Brazil (Chiroptera: Phyllostomidae: Glossophaginae)
FIGURE 5. Occlusal view of the well-developed premaxillae and upper incisors of Dryadonycteris capixaba (holotype, ALP 9667). Note the presence of two small foramina between the premaxillae (scale bar = 0.5 mm).
FIGURE 8 in New Genus and Species of Nectar-Feeding Bat from the Atlantic Forest of Southeastern Brazil (Chiroptera: Phyllostomidae: Glossophaginae)
FIGURE 8. Ventral view of the skull of the choeronycterine bats (A) Scleronycteris ega (USNM 407889), (B) Dryadonycteris capixaba (ALP 9667), (C) Hylonycteris underwoodi (AMNH 178904), (D) Lichonycteris degener (ALP 5990), (E) Musonycteris harrisoni (AMNH 235179), (F) Choeronycteris mexicana (AMNH 27311), (G) Choeroniscus minor (AMNH 266121), and (H) Anoura caudifer (ALP 1734) (scale bar = 5 mm).
FIGURE 6 in New Genus and Species of Nectar-Feeding Bat from the Atlantic Forest of Southeastern Brazil (Chiroptera: Phyllostomidae: Glossophaginae)
FIGURE 6. Oblique occlusal view of the upper molars (A) and lateral labial view of the lower molars (B) of Dryadonycteris capixaba (holotype, ALP 9667). Cusps indicated in the second upper molar are as follows: parastyle (a), mesostyle (b), metastyle (c), metacone (d), and protocone (e). In the second lower molar, cusps are as follows: paraconid (a), protoconid (b), metaconid (c), hypoconid (d), and entoconid (e). Note the absence of a distinct paracone on the upper molars. This trait is variable in Dryadonycteris, with the paratypes exhibiting somewhat better development of this cusp (see text for discussion) (scale bar = 0.5 mm).
FIGURE 2 in New Genus and Species of Nectar-Feeding Bat from the Atlantic Forest of Southeastern Brazil (Chiroptera: Phyllostomidae: Glossophaginae)
FIGURE 2. Right oblique view of the head of Dryadonycteris capixaba (holotype, ALP 9667), from Reserva Natural Vale, municipality of Linhares, northern state of Espírito Santo, southeastern Brazil.
FIGURE 4 in New Genus and Species of Nectar-Feeding Bat from the Atlantic Forest of Southeastern Brazil (Chiroptera: Phyllostomidae: Glossophaginae)
FIGURE 4. Dorsal, ventral, and lateral views of the skull and lateral view of the mandible of specimens of Dryadonycteris capixaba (holotype, ALP 9667, on the left; paratype ALP 9599, on the right) (scale bar = 5 mm).
FIGURE 1 in New Genus and Species of Nectar-Feeding Bat from the Atlantic Forest of Southeastern Brazil (Chiroptera: Phyllostomidae: Glossophaginae)
FIGURE 1. Map showing the municipality of Linhares in the northern part of the state of Espírito Santo in southeastern Brazil (A), and the collecting sites of Dryadonycteris capixaba at the Reserva Natural Vale and Floresta Nacional de Goytacazes (B). The symbols mark the collecting localities of the holotype (filled star) and paratypes (filled circles).
FIGURE 7 in New Genus and Species of Nectar-Feeding Bat from the Atlantic Forest of Southeastern Brazil (Chiroptera: Phyllostomidae: Glossophaginae)
FIGURE 7. Dorsal view of the skull of the choeronycterine bats (A) Scleronycteris ega (USNM 407889), (B) Dryadonycteris capixaba (ALP 9667), (C) Hylonycteris underwoodi (AMNH 178904), (D) Lichonycteris degener (ALP 5990), (E) Musonycteris harrisoni (AMNH 235179), (F) Choeronycteris mexicana (AMNH 27311), (G) Choeroniscus minor (AMNH 266121), and (H) Anoura caudifer (ALP 1734) (scale bar = 5 mm).
FIGURE 3 in New Genus and Species of Nectar-Feeding Bat from the Atlantic Forest of Southeastern Brazil (Chiroptera: Phyllostomidae: Glossophaginae)
FIGURE 3. Dorsal fur (A) and palmar view of left hind foot (B) of Dryadonycteris capixaba (holotype, ALP 9667). Note the tricolored banding pattern of the fur and the nearly equal length of the foot relative to the length of the calcar.
FIGURE 6. Cytochrome-b in A New Species of Nectar-feeding Bat of the Genus Hsunycteris (Phyllostomidae: Lonchophyllinae) from Northeastern Peru
FIGURE 6. Cytochrome-b maximum likelihood (ML) phylogram for the subfamily Lonchophyllinae. Support statistics from ML analysis and Bayesian inference (BI) are indicated at each resolved node. For the ML analysis, gray shading indicates bootstrap frequencies between 50% and 75% and black indicates bootstrap frequencies>75%. For the BA, gray indicates posterior probabilities <0.95, whereas black indicates posterior probabilities>0.95.
FIGURE 5 in A New Species of Nectar-feeding Bat of the Genus Hsunycteris (Phyllostomidae: Lonchophyllinae) from Northeastern Peru
FIGURE 5. Results of principal components analysis, illustrating the dispersion of specimen scores for female Hsunycteris cadenai (open triangles), H. dashe (asterisk), H. pattoni (filled circles), and H. thomasi (open circles). See text for explanation and appendix 3 for factor loadings and other results.
FIGURE 3 in A New Species of Nectar-feeding Bat of the Genus Hsunycteris (Phyllostomidae: Lonchophyllinae) from Northeastern Peru
FIGURE 3. Anterior views of the chins of Hsunycteris dashe (A, AMNH 273165) and H. pattoni (B, MUSM 13205) illustrating taxonomic differences in the arrangement of the dermal papillae. In H. dashe the chin has several small dermal papillae arranged in a V and separated by a wide basal cleft. In H. pattoni, however the dermal papillae on the chin are larger and are not separated by a basal cleft.
FIGURE 4 in A New Species of Nectar-feeding Bat of the Genus Hsunycteris (Phyllostomidae: Lonchophyllinae) from Northeastern Peru
FIGURE 4. Occlusal views of partial upper toothrows in Hsunycteris dashe (A, MUSM 15206), H. pattoni (B, MUSM 13205), and H. thomasi (C, AMNH 16120) illustrating taxonomic differences in the morphology of the premolars and first molar (see text). Abbreviations: p, parastyle of M1; P4, first upper premolar; P5, second upper premolar; M1, first upper molar.
FIGURE 2 in A New Species of Nectar-feeding Bat of the Genus Hsunycteris (Phyllostomidae: Lonchophyllinae) from Northeastern Peru
FIGURE 2. Map showing collecting localities of Hsunycteris species within the Yavarí-Ucayali interfluvial region (boundaries highlighted in gray). See appendix 2 for locality names and geographic coordinates. The arrow indicates the type locality of H. dashe.
Data from: Pollinator competition and the contingency of nectar depletion during an early spring resource pulse
<p>Concerns about competition between pollinators are predicated on the assumption of floral resource limitation. Floral resource limitation, however, is a complex phenomenon involving the interplay of resource production by plants, resource demand by pollinators, and exogenous factors — like weather conditions — that constrain both plants and pollinators. In this study, we examine nectar limitation during the mass flowering of rosaceous fruit trees in early spring. Our study is set in the same region as a previous study that found extremely severe nectar limitation in summer grasslands. We use this seasonal contrast to evaluate two alternative hypotheses concerning the seasonal dynamics of floral resource limitation: either (H1) rates of resource production and consumption are matched through seasonal time to maintain a consistent degree of resource limitation or (H2) a mismatch of high floral resource production and low pollinator activity in early spring creates a period of relaxed resource limitation that intensifies later in the year. We found generally much lower depletion in our study compared to the near 100% depletion found in the summer study, but depletion rates varied markedly through diel time and across sampling days, with afternoon depletion rates sometimes exceeding 80%. In some cases, there were also pronounced differences in depletion rate across simultaneously sampled floral species, indicating different degrees of nectar exploitation. These findings generally support the seasonal mismatch hypothesis (H2) but underscore the complex contingency of nectar depletion. The challenge of future work is to discern how the fluctuation of resource limitation across diel, inter-diel, and seasonal time scales translates into population-level fitness outcomes for pollinators.</p>
Data for: Intraspecific variation in dispersal probability and host quality shape nectar microbiomes
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Data from: Quantifying nectar production by flowering plants in urban and rural landscapes
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Data from: Pollinator competition and the contingency of nectar depletion during an early spring resource pulse
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Heather nectar extracts reduce within-colony epidemics of the bumblebee parasite <em>Crithidia bombi</em>
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Trait matching affects the probability of nectar robbing in plant-pollinator networks
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Phenological mismatch is less important than total nectar availability for checkerspot butterflies
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