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139 results for “savannahs”
To mate, or not to mate: the evolution of reproductive diapause facilitates insect radiation into African savannahs in the Late Miocene
<p>1. Many tropical environments experience cyclical seasonal changes, frequently with pronounced wet and dry seasons, leading to a highly uneven temporal distribution of resources. Short-lived animals inhabiting such environments often show season-specific adaptations to cope with alternating selection pressures. 2. African Bicyclus butterflies show strong seasonal polyphenism in a suite of phenotypic and life-history traits, and their adults are thought to undergo reproductive diapause associated with the lack of available larval host plants during the dry season. 3. Using three years of longitudinal field data for three species in Malawi, dissections demonstrated that one forest species reproduces continuously whereas two savannah species undergo reproductive diapause in the dry season, either with or without pre-diapause mating. Using additional data from field-collected and museum samples, we then documented the same three mating strategies for a further 37 species. 4. Phylogenetic analyses indicated that the ancestral state was a non-diapausing forest species, and that habitat preference and mating strategy evolved in a correlated fashion. 5. Bicyclus butterflies underwent rapid diversification during the Late Miocene, coinciding with expansions into more open savannah habitat. We conclude that the ability to undergo reproductive diapause was a key trait that facilitated colonization and eventual radiation into savannahs in the Late Miocene.</p>
FIGURES 10–18 in A new phytophagous Bracon Fabricius (Hymenoptera, Braconidae) associated with Protium ovatum Engl. (Burseraceae) fruits from Brazilian savannah
FIGURES 10–18. Bracon zuleideae sp. nov. female, coloration.10, 13, 16. Habitus, lateral view. 11, 14, 17. Head, frontal view. 12, 15, 18. Habitus, dorsal view. Scale = 1.0 mm.
FIGURES 4–9 in A new phytophagous Bracon Fabricius (Hymenoptera, Braconidae) associated with Protium ovatum Engl. (Burseraceae) fruits from Brazilian savannah
FIGURES 4–9. Bracon zuleideae sp. nov. female. 4. Head, frontal view. 5. Antenna. 6. Mesosoma, dorsal view, and detail of the anterior margin of scutellum. 7. Basal lobe of tarsal claw. 8. Metasoma, dorsal view. 9. Ventral valves, lateral view.
FIGURES 1–3 in A new phytophagous Bracon Fabricius (Hymenoptera, Braconidae) associated with Protium ovatum Engl. (Burseraceae) fruits from Brazilian savannah
FIGURES 1–3. Protium ovatum Engl. (Burseraceae). 1. Branch with fruits. 2. Cross section of healthy fruit. 3. Cross section of fruit damaged by Bracon zuleideae sp. nov. larvae.
FIGURES 19–24 in A new phytophagous Bracon Fabricius (Hymenoptera, Braconidae) associated with Protium ovatum Engl. (Burseraceae) fruits from Brazilian savannah
FIGURES 19–24. Bracon zuleideae sp. nov. male, coloration.19, 22. Habitus, lateral view. 20, 23. Head, frontal view. 21, 24. Habitus, dorsal view. Scale = 1.0 mm.
Queen's Park Savannah Drinking Fountain
Source: Objaverse 1.0 / Sketchfab
Savannah River Projectile Point
A rhyolite Savannah River projectile point recovered during the archaeological investigaiton of precontact period sites near Pimlico in the City of Baltimore by Richard Stearns and the Natural History Society of Maryland in 1949. The Savannah River point dates to the Late Archaic period ranging from 3900 to 3700 BP (2450-2050 BC). The Savannah River point has a large, triangular blade with a broad, square, straight stem. Courtesy of the Natural History Society of Maryland which has given permission for the model to be downloadable for non-commercial educational purposes. Source: Objaverse 1.0 / Sketchfab
Plant and pollinator interactions from British Columbia from Oak Savannah, Shrub-Steppe, and restored hedgerows
<p>This dataset contains the data analyzed in "Guzman, L.M., Chamberlain, S. and Elle, E. (2021) Network robustness and structure depends on the phenological characteristics of plants and pollinators. Ecology and Evolution"</p> <p>The data comprises plant-pollinator interactions collected in three ecosystems (Oak Savannah, Shrub-Steppe and restored hedgerows) from British Columbia. <b>These</b> three vegetation types comprised three different studies. The average distance between sites within studies was 19km, 18km and 29km for the oak savannah, shrub-steppe and hedgerows respectively. For simplicity we use "pollinator" throughout this paper to refer to insects and hummingbirds observed visiting flowers and contacting reproductive organs, although their effectiveness at transfer of pollen has not been assessed. The networks were comprised largely of bees, with wasps and hoverflies also common. Less common were butterflies and beetles. The plants were largely forbs with some shrubs; insect-pollinated trees were not sampled for largely logistical reasons of tree height but tended to be uncommon in these ecosystems.</p>
FIGURE. Landscapes and vegetation types at Quiçama National Park. A. Wooded savannah with Adansonia digitata. B. Mosaic of wooded savannah and thicket. C. Grassy savannah. D. Slope with thicket. E. Grassy savanna with Setaria welwitschi. F. Wooded savannah. G. Cuanza River shores with herbaceous vegetation. H. Herbaceous vegetation on the banks of the Cuanza River and slope with open forest. I. Coastal sands. J. Mangrove at the Cuanza River estuary, with Rhizophora racemosa. (Photographs by the authors). in An annotated checklist of the vascular flora of Quiçama National Park, Angola
FIGURE. Landscapes and vegetation types at Quiçama National Park. A. Wooded savannah with Adansonia digitata. B. Mosaic of wooded savannah and thicket. C. Grassy savannah. D. Slope with thicket. E. Grassy savanna with Setaria welwitschi. F. Wooded savannah. G. Cuanza River shores with herbaceous vegetation. H. Herbaceous vegetation on the banks of the Cuanza River and slope with open forest. I. Coastal sands. J. Mangrove at the Cuanza River estuary, with Rhizophora racemosa. (Photographs by the authors).
Possible Savannah River Projectile Point Base
A jasper projectile point base, likely Savannah River-type, recovered during the 1943 excavation of a precontact period site along the Susquehanna River in Cecil County, Maryland by Richard Stearns and the Natural History Society of Maryland. The Savannah River point dates to the Late Archaic period ranging from 3900 to 3700 BP (2450-2050 BC). The Savannah River point has a large, triangular blade with a broad, square, straight stem. Courtesy of the Natural History Society of Maryland which has given permission for the model to be downloadable for non-commercial educational purposes. Source: Objaverse 1.0 / Sketchfab
FIGURES 2–7. Habitats sampled during the study. 2 in The Pyraloidea (Lepidoptera) fauna of the woody savannah belt in Mali, West Africa
FIGURES 2–7. Habitats sampled during the study. 2. Sсattered bushes on slopes of Sibi Hills. 3. Savannah with forest patсhes. 4. Colonna light trap near riverine forest. 5. Artifiсial pool near Voronina with ruderal plants on adjaсent land. 6. Bushes on sand dunes near Niger River. 7. Riverine forest in the flooded area of Niger River.
FIGURE 23 in The Pyraloidea (Lepidoptera) fauna of the woody savannah belt in Mali, West Africa
FIGURE 23. Oссurrenсe in perсentages of the 17 most сommon speсies with number of speсimens сolleсted. White bars = known pest speсies.
FIGURES 8–22 in The Pyraloidea (Lepidoptera) fauna of the woody savannah belt in Mali, West Africa
FIGURES 8–22. Some images of Pyraloidea speсies from Mali. 8. Parapoynx fluctuosalis. 9. Cryptosana caritalis. 10. Pyrausta phoenicealis. 11. Diaphania indica. 12. Glyphodes bicolor. 13. Glyphodes onychinalis. 14. Glyphodes stolalis. 15. Haritalodes derogata. 16. Syllepte rogationis. 17. Nevrina sp. 18. Nevrina procopia (Stoll in Cramer & Stoll, 1781) from Liberia. 19. Orphanostigma abruptalis. 20. Synclera traducalis. 21. Ghesquierellana hirtusalis. 22. Ulopeza conigeralis.
FIGURE 4 in Description of a new species of the genus Cnemaspis Strauch, 1887 (Reptilia: Squamata: Gekkonidae) from the Nilgala Savannah forest, Uva Province of Sri Lanka
FIGURE 4. Distribution of Cnemaspis nilgala sp. nov. in Nilgala savannah forest, Monaragala District, Sri Lanka. Holotype locality is indicates solid triangle, Paratype localities are marked with solid squares, and additional localities are with solid circles.
FIGURE 1 in Description of a new species of the genus Cnemaspis Strauch, 1887 (Reptilia: Squamata: Gekkonidae) from the Nilgala Savannah forest, Uva Province of Sri Lanka
FIGURE 1. Scatter plot of the principal components 1 and 2 illustrates morphometric differentiation between Cnemaspis nilgala sp. nov. (filled circles) and three closely related species, C. alwisi (filled squares), C. rajakarunai (open circles) and C. punctata (open squares). The arrows indicate the original morphometric variables of the analyses: ED = eye diameter, EN =eye to nostril length, EL = ear length, IO = interorbital width, HD = head depth, LAL = lower arm length; SVL = snout-vent length; TRL = trunk length; TBL = tibia length; TAL = tail length.
FIGURE 3 in Description of a new species of the genus Cnemaspis Strauch, 1887 (Reptilia: Squamata: Gekkonidae) from the Nilgala Savannah forest, Uva Province of Sri Lanka
FIGURE 3. Cnemaspis nilgala sp. nov. male paratype (2018.06.02.NH) live in-situ (a) dorsolateral view of the full body; (b) dorsal view of the full body; (d) cloacal characters, femoral pores, and subcaudals pattern; (d) dorsal head; (e) lateral head; (f) ventral head; (g) smooth ventral area of the body; (h) subdigital lamellae on pes (Photos: Madhava Botejue).
FIGURE 2 in Description of a new species of the genus Cnemaspis Strauch, 1887 (Reptilia: Squamata: Gekkonidae) from the Nilgala Savannah forest, Uva Province of Sri Lanka
FIGURE 2. Close-ups of Cnemaspis nilgala sp. nov. male holotype (2018.07.01.NH): (a) dorsal head, (b) lateral head, (c) ventral head, (d) cloacal characters and femoral pores,(e) subdigital lamellae on manus, (f) subdigital lamellae on pes, (g) smooth ventral scales, (h) dorsal granules of the body, (i) dorsal and ventral aspects of male holotype (2018.07.01.NH), (j) dorsal and ventral aspects of female paratype (2018.06.01.NH) (Photos: Madhava Botejue).
Fig. 1 in Red- and yellow-footed tortoises, Chelonoidis carbonaria and C. denticulata (Reptilia: Testudines: Testudinidae), in South American savannahs and forests: do their phylogeographies reflect distinct habitats?
Fig. 1 Approximate ranges of Chelonoidis carbonaria and C. denticulata (modified from Iverson 1992) and geographic distribution of haplotypes. Locality numbers refer to Appendix 1. Question marks indicate that the southern part of the range of C. carbonaria might be connected with the northern part. Symbols for C. carbonaria correspond to haplotype clades (Fig. 2); upper-case letters indicate geographic origin within the range (N, north; NE, northeast; etc.)
Fig. 5 in Red- and yellow-footed tortoises, Chelonoidis carbonaria and C. denticulata (Reptilia: Testudines: Testudinidae), in South American savannahs and forests: do their phylogeographies reflect distinct habitats?
Fig. 5 Chelonoidis carbonaria; left: Brazil (Museum of Zoology Dresden MTD D 3620); right: Filadelfia, Chaco, Paraguay (Museum of Zoology Dresden MTD D 43485). Scale bars: 10 cm. Note distinct shell shapes and colorations
Figure 4 in Insights into marking behavior of giant anteaters: a camera trap study in the Rupununi savannahs, Guyana
Figure 4: Distribution of marking behaviors in "female with cub," "two adults," and "one adult" social categories, adjusting for survey effort. The Y-axes shows the proportion of marking behaviors recorded per day of camera recording in each month, offering insights into their frequency while accounting for effort variations.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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