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75 results for “Tyto”
Figure 1 in Small mammals in the diet of Barn Owls (Tyto furcata) in an urban area in Rio de Janeiro state, Brazil, with a new record of the dwarf mouse opossum (Cryptonanus)
Figure 1. Satellite image showing nesting site of the T. furcata couple and the surrounding area in Campos dos Goytacazes, Rio de Janeiro. Adapted from Google Earth®.
Fig. 2 in Small mammals from barn owl Tyto alba pellets in a Mediterranean agroforestry landscape of central Italy
Fig. 2 - Dendrogram of similarity based on species frequency (algorithm: Paired group - UPGMA, Euclidean similarity index). / Dendro- gramma di similarità basato sulla frequenza di specie (algoritmo: gruppi appaiati - UPGMA, indice di similarità euclidea). Sites: / Siti: A) Roccaccia. B) Riminino. C) Ripagretta. D) San Giorgio. E) Montericcio.
Fig. 1 in Small mammals from barn owl Tyto alba pellets in a Mediterranean agroforestry landscape of central Italy
Fig. 1 - The study area. Circles and letters (A-E) show the five investigated sites. / Area di studio. I cerchi e le lettere (A-E) indicano i cinque siti studiati.
Fig. 3 in Small mammals from barn owl Tyto alba pellets in a Mediterranean agroforestry landscape of central Italy
Fig. 3 - Detrended Correspondence Analysis. / Analisi delle Corrispondenze 'Detrended' Sites: / Siti: A) Roccaccia; B) Riminino; C) Ripagretta; D) San Giorgio; E) Montericcio. Species: / Specie: Sunetr: Suncus etruscus; Sorsam: Sorex samniticus; Crosua: Crocidura suaveolens; Croleu: Crocidura leucodon; Musave: Muscardinus avellanarius; Arvita: Arvicola italicus; Micsav: Microtus savii; Aposyl: Apodemus cfr. sylvaticus; Musdom: Mus domesticus; Ratrat: Rattus rattus; Ratnor: Rattus norvegicus.
Fig. 2 in New early Pliocene owls from Langebaanweg, South Africa, with first evidence of Athene south of the Sahara and a new species of Tyto
Fig. 2. Strigid owl Athene inexpectata sp. nov. from the early Pliocene, Upper Varswater Formation at Langebaanweg, South Africa; paratypes (A, C–E, G), holotype (F) and Athene noctua, Recent (B). A. Left tibiotarsus (SAM-PQ-L20700 M), in cranial (A 1), lateral (A 2), caudal (A 3), medial (A 4), and distal (A5) views. B. Reversed right tibiotarsus (MGPT-MPOC 38), in cranial view (B 1), left tarsometatarsus in dorsal view (B 2). C. Left scapula (SAM-PQ-L25390 GA), in medial (C 1), cranial (C 2) and lateral (C 3) views. D. Right ulna (SAM-PQ-L14846), in dorsal (D 1), caudal (D 2), ventral (D 3) and cranial (D 4) views. E. Right tibiotarsus (SAM-PQ-L28927), in cranial (E 1), lateral (E 2), caudal (E 3), medial (E 4), and proximal (E5) views. F. Right tarsometatarsus (SAM-PQ-L13052 N2), in dorsal (F 1), lateral (F 2), plantar (F 3), medial (F 4), proximal (F5), and distal (F6) views. G. Right humerus (SAMPQ-L33540 C), in cranial (G 1), dorsal (G 2) caudal (G 3), ventral (G 4), and distal (G5) views.
Fig. 3 in New early Pliocene owls from Langebaanweg, South Africa, with first evidence of Athene south of the Sahara and a new species of Tyto
Fig. 3. Strigid owls from the early Pliocene, Upper Varswater Formation at Langebaanweg, South Africa. A. Asio sp. (SAM-PQ-L33521 I), right tibiotarsus, in cranial (A 1), lateral (A 2), caudal (A 3), medial (A 4), and distal (A 5) views. B. Strigidae gen. et sp. indet. (SAM-PQ-L28479 C), left tibiotarsus in cranial view. C. Bubo sp. (SAM-PQ-L28439 C), left tibiotarsus in cranial view.
Fig. 1 in New early Pliocene owls from Langebaanweg, South Africa, with first evidence of Athene south of the Sahara and a new species of Tyto
Fig. 1.Tytonid owl Tyto richae sp. nov. from the early Pliocene, Upper Varswater Formation at Langebaanweg, South Africa; paratypes (A–C, E), holotype (D). A. Left ulna (SAM-PQ-L50411 L), in dorsal (A1), caudal (A2), ventral (A3), and cranial (A4) views. B. Left coracoid (SAM-PQ-L23436), in dorsal (B1), lateral (B2), medial (B3), and ventral (B4) views. C. Left tibiotarsus (SAM-PQ-L28197 AU), in cranial (C1), lateral (C2), caudal (C3), medial (C4), and distal (C5) views. D. Right tarsometatarsus (SAM-PQ-L50354 B), in dorsal (D1), lateral (D2), plantar (D3), medial (D4), and distal (D5) views. E. Left tibiotarsus (SAM-PQ-L50022 ZA), in cranial (E1), lateral (E2), caudal (E3), medial (E4), and distal (E5) views.
Supplementary material to "Exogenous corticosterone and melanin-based coloration explain variation in juvenile dispersal behaviour in the barn owl (Tyto alba)"
<p><strong>Abstract</strong></p> <p>Natal dispersal affects many processes such as population dynamics. So far, most studies have examined the intrinsic and extrinsic factors that determine the distance between the place of birth and of first breeding. In contrast, few researchers followed the first steps of dispersal soon after fledging. To study this gap, we radio-tracked 95 barn owl nestlings (<em>Tyto alba</em>) to locate their diurnal roost sites from the fledging stage until December. This was used to test whether the age of nest departure, post-fledging movements and dispersal distance were related to melanin-based coloration, which is correlated to fitness-related traits, as well as to corticosterone, a hormone that mediates a number of life history trade-offs and the physiological and behavioural responses to stressful situations. We found that the artificial administration of corticosterone delayed the age when juveniles left their parental home-range in females but not in males. During the first few months after fledging, longer dispersal distances were reached by females compared to males, by individuals marked with larger black feather spots compared to individuals with smaller spots, by larger individuals and by those experimentally treated with corticosterone. We conclude that the onset and magnitude of dispersal is sensitive to the stress hormone corticosterone, melanin-based coloration and body size. </p>
Figure 9 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 9. Proportional representation of 3-month age classes (C1–8) of Otomys irroratus at Geelbek in the West Coast National Park by month and season.
Figure 10 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 10. Proportion of total measured Otomys irroratus individuals born per month at Geelbek in the West Coast National Park during 1984–8, based on material collected during 1985–8, compared with mean monthly rainfall at Langebaanweg for the same period.
Figure 8 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 8. Variation in (A) maxillary and (B) mandibular alveolar length in Tatera afra from selected sites with mean annual precipitation increasing from left to right. SFN and SFS, Steenbokfontein North and South (139 mm); AGA, Andriesgrond (248 mm); BBS, Blombos (464 mm); KFN, Kraaifontein (569 mm); STB, Stellenbosch Airfield (629 mm).
Figure 6 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 6. Dominant species in quarter-degree squares where the micromammalian sample comprises>100 individuals. Blank squares yielded samples of fewer than 100 individuals. Ch, Cryptomys hottentotus; Da, Desmodillus auricularis; Mm, Mus minutoides; Mv, Myosorex varius; Oi, Otomys irroratus; Rp, Rhabdomys pumilio; Sv, Suncus varilla; Ta, Tatera afra.
Figure 1 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 1. Location of the Western Cape Province in South Africa (A) and of Western Cape Province quarterdegree squares yielding Tyto alba pellet samples discussed in this paper (B).
Figure 5 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 5. Distribution of Gerbillinae (A, B) and Soricidae (C–F) whose remains have been found in Tyto alba pellets from 10 or more Western Cape Province quarter-degree squares. White circles indicate dominance in squares yielding remains of at least 100 individuals.
Figure 7 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 7. Significant correlation of seasonal variation in percentage representation of Suncus varilla and Steatomys krebsii and climate variables in the De Hoop Nature Reserve (Geelbek and Bottelary). (A) Same-season rainfall and proportions of S. varilla; (B) same-season minimum monthly temperature and S. krebsii; (C) previous-season minimum monthly temperature and S. varilla. See text for further details.
Figure 3 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 3. Distribution of Murinae whose remains have been found in Tyto alba pellets from 10 or more Western Cape Province quarter-degree squares. White circles indicate dominance in squares yielding remains of at least 100 individuals.
Figure 2 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 2. Distribution of Chrysochloridae (A), Macroscelididae (B), Bathyergidae (C, D) and Vespertilionidae (E) whose remains have been found in Tyto alba pellets from 10 or more Western Cape Province quarter-degree squares. White circles indicate dominance in squares yielding remains of at least 100 individuals.
Figure 4 in Micromammalian distribution and abundance in the Western Cape Province, South Africa, as evidenced by Barn owls Tyto alba (Scopoli)
Figure 4. Distribution of Otomyinae (A–C) and Dendromurinae (D–F) whose remains have been found in Tyto alba pellets from 10 or more Western Cape Province quarter-degree squares. White circles indicate dominance in squares yielding remains of at least 100 individuals.
Figure 3 in Food habits of the barn owl Tyto alba in the National Reserve Pampa del Tamarugal, Atacama Desert, North Chile
Figure 3. Variation of small mammal diversity in the diet of Tyto alba along Chile, measured using the Shannon– Wiener index (H9). (a) Variation across the latitudinal gradient; (b) variation across the rainfall gradient.
Figure 1 in Food habits of the barn owl Tyto alba in the National Reserve Pampa del Tamarugal, Atacama Desert, North Chile
Figure 1. Map of South America, showing the 10 study sites along Chile: 1, Tamarugal; 2, Chiu-Chiu; 3, Fray Jorge; 4, Puchuncavı´; 5, La Campana; 6, La Dehesa; 7, Baños del Flaco; 8, Burca; 9, Lastarria; 10, Torres del Paine.
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