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103 results for “seed feeding”
Data from: Seed preference is only weakly linked to seed-type-specific feeding performance in a songbird
<p>The dehusking of seeds by granivorous songbirds is a complex process that requires fast, coordinated and sensory-feedback-controlled movements of beak and tongue. Hence, efficient seed handling requires a high degree of sensorimotoric skill and behavioural flexibility, since seeds vary considerably in size, shape and husk structure. To deal with this variability, individuals might specialise on specific seed types, which could result in greater seed handling efficiency of the preferred seed type, but lower efficiency for other seed types. To test this, we assessed seed preferences of canaries (Serinus canaria) through food choice experiments and related these to data of feeding performance, seed handling skills and beak kinematics during feeding on small, spindle-shaped canary seeds and larger, spheroid-shaped hemp seeds. We found great variety in seed preferences among individuals: some had no clear preference, while others almost exclusively fed on hemp seeds, or even prioritized novel seed types (millet seed). Surprisingly, we only observed few and weak effects of seed preference on feeding efficiency. This suggests that either the ability to handle seeds efficiently can be readily applied across various seed types, or alternatively, it may indicate that achieving high levels of seed-specific handling skills does not require extensive practice.</p>
Fig. 3 in Morphological traits, allometric relationship and competition of two seed-feeding species of beetles in infested pods
Fig. 3. Negative allometry depicted by the slopes and their confidence intervals for the pronotum and elytron allometry (pronotum length and elytron length in relation to body weight) between infestation categories for both bruchine species. G1, low infestation (0–0.30% of attacked seeds); G2, medium infestation (0.31–0.60% of attacked seeds); G3, high infestation (0.61–0.90% of attacked seeds).
Fig. 1 in Morphological traits, allometric relationship and competition of two seed-feeding species of beetles in infested pods
Fig. 1. Variations in body weight, pronotum and elytron length between Merobruchus terani and Stator maculatopygus and for males and females. The analyses used a linear mixed model with a log-normal distribution and Tukey's pairwise comparison. MF, M. terani females; MM, M. terani males; SF, S.maculatopygus females; SM, S. maculatopygus males.
Figure 3 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 3. Percentages of survival of two cohorts of seedlings of Protium tovarense monitored during 9 and 14 years.
Figure 2 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 2. Short-term flowering and fruiting phenology of Protium tovarense including phenophase occurrence (a) and intensity (b). See text for explanation.
Figure 7 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 7. Features of final instar larva of Bracon phytophagus sp. n. taken from chill-killed specimens. (a) Frontal view of head capsule showing large, multi-toothed, heavily sclerotized mandibles; (b) oblique view of head showing (arrowed) the small papilliform antenna; (c) lateral view of mature larva showing large humps on abdominal segments 2–7.
Figure 6 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 6. Habitus and features of the metasoma of males of Bracon phytophagus sp. n. illustrated using Automontageẹ. (a, c) Dark morph; (b, d) yellow form.
Figure 1 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 1. Long-term flowering and fruiting phenology of Protium tovarense in northern Venezuela, including periodicity of El Niño and La Niña events.
Figure 8 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 8. Prepupa, pupa, and traces of silk in pupation chamber of Bracon phytophagus sp. n. (a, b) Prepupa, in lateral and ventral views, showing ''S''-shaped curvature and beginning of development of ovipositor structures posteriorly (lower left); (c) posterior of pupa in situ showing ovipositor with remains of larval skin (head capsule: arrowed) adhering to ovipositor; (d) frass from inside pupation hole with traces of thin silk-like material.
Figure 5 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 5. Habitus and details of claw and ovipositor of Bracon phytophagus sp. n., holotype female. (a) Habitus; (b) oblique ventral view of mid-telotarsus showing large basal lobe; (c) apex of ovipositor and ovipositor sheaths; (d) detail of apex of ovipositor showing extra serrations.
Figure 4 in Reproductive phenology and pre-dispersal seed-feeding in Protium tovarense (Burseraceae), with a description of the first known phytophagous ''Bracon'' species (Hymenoptera: Braconidae: Braconinae)
Figure 4. Fruit (volume), seed embryo (volume), and larval growth (length) in Protium tovarense from 1-monthold fruits until fruit ripening (a) and percentage of fruits infested during the same interval of time (b).
Data from: Seed preference is only weakly linked to seed-type-specific feeding performance in a songbird
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FIGURES 10–11 in Taxonomy, host-plant associations and phylogeny of African Crotalaria - feeding seed beetles (Coleoptera, Chrysomelidae, Bruchinae): the Conicobruchus strangulatus (Fåhraeus) species group
FIGURES 10–11. Conicobruchus strangulatus: 10—median lobe; 11—basal strut and lateral lobes (specimen 14495, Senegal).
FIGURE 2 in Taxonomy, host-plant associations and phylogeny of African Crotalaria - feeding seed beetles (Coleoptera, Chrysomelidae, Bruchinae): the Conicobruchus strangulatus (Fåhraeus) species group
FIGURE 2. Conicobruchus atrosuturalis: 2—median lobe (Paratype, Ethiopia); arrows were used to show the following structures: 2A—minute spinules; 2B—ctenoid scales; 2C—small sclerotized teethes; 2D—strong ventro-lateral dented rods; 2E—teethes; 2F—dented sticks or masses; 2G—apical ampoule.
FIGURES 3–4 in Taxonomy, host-plant associations and phylogeny of African Crotalaria - feeding seed beetles (Coleoptera, Chrysomelidae, Bruchinae): the Conicobruchus strangulatus (Fåhraeus) species group
FIGURES 3–4. Conicobruchus cicatricosus: 3—median lobe; 4—basal strut and lateral lobes (specimen 02212, Kenya).
FIGURE 18 in Taxonomy, host-plant associations and phylogeny of African Crotalaria - feeding seed beetles (Coleoptera, Chrysomelidae, Bruchinae): the Conicobruchus strangulatus (Fåhraeus) species group
FIGURE 18. Best tree (L= -25368.23) from the partitioned maximum likelihood analyses of the dataset. Bootstrap values> 50% are figured on nodes.
FIGURES 12–17 in Taxonomy, host-plant associations and phylogeny of African Crotalaria - feeding seed beetles (Coleoptera, Chrysomelidae, Bruchinae): the Conicobruchus strangulatus (Fåhraeus) species group
FIGURES 12–17. Conicobruchus strangulatus: Ornamentation of saccus, ventral view: 12—specimen 00714, Burkina Faso; 13—specimen 02699, Senegal, Dakar; 14—specimen 14395, Dakar (Joal); 15—specimen 00614, Mali; 16—specimen 14495, Senegal (Missira); 17—specimen 19207, Senegal (Nianing).
FIGURES 8–9 in Taxonomy, host-plant associations and phylogeny of African Crotalaria - feeding seed beetles (Coleoptera, Chrysomelidae, Bruchinae): the Conicobruchus strangulatus (Fåhraeus) species group
FIGURES 8–9. Conicobruchus rubricollis: 7—median lobe; 8—basal strut and lateral lobes (specimen 18907, Zimbabwe).
FIGURES 5–7 in Taxonomy, host-plant associations and phylogeny of African Crotalaria - feeding seed beetles (Coleoptera, Chrysomelidae, Bruchinae): the Conicobruchus strangulatus (Fåhraeus) species group
FIGURES 5–7. Conicobruchus decoratus: 5—median lobe; 6—basal strut and lateral lobes (specimen 02012, Zambia); Conicobruchus flabellicornis: 7—median lobe (specimen 01209, Kenya).
FIGURE 1 in Taxonomy, host-plant associations and phylogeny of African Crotalaria - feeding seed beetles (Coleoptera, Chrysomelidae, Bruchinae): the Conicobruchus strangulatus (Fåhraeus) species group
FIGURE 1. Dorsal view of specimens belonging the to six species of the Conicobruchus strangulatus species group.
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