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446 results for “Mascarenes”
FIGURE 2 in Notes on the correct taxonomic status of Haliotis rugosa Lamarck, 1822, and Haliotis pustulata Reeve, 1846, with description of a new subspecies from Rodrigues Island, Mascarene Islands, Indian Ocean (Mollusca: Vetigastropoda: Haliotidae)
FIGURE 2. Spire position of the three H. rugosa subspecies as a function of size. Spire position in percent of shell length.
FIGURE 3. 1–3. Haliotis rugosa rugosa. 1. 53.3 in Notes on the correct taxonomic status of Haliotis rugosa Lamarck, 1822, and Haliotis pustulata Reeve, 1846, with description of a new subspecies from Rodrigues Island, Mascarene Islands, Indian Ocean (Mollusca: Vetigastropoda: Haliotidae)
FIGURE 3. 1–3. Haliotis rugosa rugosa. 1. 53.3 mm, Pereybere, Mauritius, BOC. 2. 53.3 mm, Perebere, Mauritius, BOC. 3. 58.1 mm, La Gaulette, Mauritius. BOC. 4–6. H. rugosa pustulata. 4. 37.4 mm. Tulear, Madagascar. BOC. 5. 38.6 mm. Fernão Veloso, Nacala, Mozambique, BOC. 6. 38.6 mm. Fernão Veloso, Nacala Bay, Mozambique, BOC. 7–9. H. unilateralis. 7. 36.8 mm, Dahab, Sinai, Egypt, BOC. 8. 24.0 mm, South Island, Cargados Carajos Shoals, Mauritius. RKC. 9. 32.0 mm, South Island, Cargados Carajos Shoals, Mauritius, RKC. 10–12. H. clathrata. 10. 23.3 mm, Fernão Veloso, Nacala Bay, Mozambique, BOC. 11. 21.2 mm, North Pemba Island, Mozambique, BOC. 12. 22.6 mm, North Pemba Island, Mozambique, BOC. 13–15. Details of shell sculture and coloration. 13. H. rugosa rugosa, 35.4 mm, Mauritius, RKC. 14. H. rugosa pustulata, 37.5 mm, Tulear, Madagascar, BOC. 15. H. rugosa rodriguensis, 37.0 mm, Anse Cotton, Rodrigues Island, BOC.
FIGURE 3 in A new species of Saurida (Pisces: Synodontidae) from the Mascarene Plateau, Western Indian Ocean
FIGURE 3. Photograph of 'Saurida undosquamis' from Saya da Malha Bank (Amaoka et al. 1976) now identified as S. tweddlei n.sp.
FIGURE 2 in A new species of Saurida (Pisces: Synodontidae) from the Mascarene Plateau, Western Indian Ocean
FIGURE 2. Holotype of Saurida tweddlei n.sp., SAIAB 185941, 354.0 mm SL, Saya da Malha Bank (photo: O. Alvheim)
FIGURE 1 in A new species of Saurida (Pisces: Synodontidae) from the Mascarene Plateau, Western Indian Ocean
FIGURE 1. Map of Mascarene Plateau showing location and station numbers at which Saurida tweddlei n.sp. were caught: + = RV Dr Fridtjof Nansen stations, with station number; ★ = FV Ryuyo-Maru No. 2 stations.
FIGURE 2 in Shallow-water reef ophiuroids (Echinodermata: Ophiuroidea) of Réunion (Mascarene Islands), with biogeographic considerations
FIGURE 2. Pictures of species encountered in Réunion Island waters. Pictures were taken of freshly collected specimens except when indicated. Photo credit: BIOTAS.
FIGURE 4 in Shallow-water reef ophiuroids (Echinodermata: Ophiuroidea) of Réunion (Mascarene Islands), with biogeographic considerations
FIGURE 4. Pictures of species encountered in Réunion Island waters. Pictures were taken of freshly collected specimens except when indicated. Photo credit: BIOTAS.
FIGURE 5 in Shallow-water reef ophiuroids (Echinodermata: Ophiuroidea) of Réunion (Mascarene Islands), with biogeographic considerations
FIGURE 5. Pictures of species encountered in Réunion Island waters. Pictures were taken of freshly collected specimens except when indicated. Photo credit: BIOTAS.
FIGURE 3 in Shallow-water reef ophiuroids (Echinodermata: Ophiuroidea) of Réunion (Mascarene Islands), with biogeographic considerations
FIGURE 3. Pictures of species encountered in Réunion Island waters. Pictures were taken of freshly collected specimens except when indicated. Photo credit: BIOTAS.
On following pages: 177. Bonin Flying Fox (Pteropus pselaphon); 178. Little Golden-mantled Flying Fox (Pteropus pumilus); 179. Lyle's Flying Fox (Pteropus lylei); 180. Indian Flying Fox (Pteropus medius); 181. Rodrigues Flying Fox (Pteropus rodricensis); 182. Large Flying Fox (Pteropus vampyrus); 183. Aldabra Flying Fox (Pteropus aldabrensis); 184. Malagasy Flying Fox (Pteropus rufus); 185. Seychelles Flying Fox (Pteropus seychellensis); 186. Greater Mascarene Flying Fox (Pteropus nigen; 187. Aru Flying Fox (Pteropus aruensis); 188. Kai Flying Fox (Pteropus keyensis); 189. Black-bearded Flying Fox (Pteropus melanopogon); 190. South Moluccan Flying Fox (Pteropus chrysoproctus); 191. North Moluccan Flying Fox (Pteropus caniceps). in Pteropodidae
On following pages: 177. Bonin Flying Fox (Pteropus pselaphon); 178. Little Golden-mantled Flying Fox (Pteropus pumilus); 179. Lyle's Flying Fox (Pteropus lylei); 180. Indian Flying Fox (Pteropus medius); 181. Rodrigues Flying Fox (Pteropus rodricensis); 182. Large Flying Fox (Pteropus vampyrus); 183. Aldabra Flying Fox (Pteropus aldabrensis); 184. Malagasy Flying Fox (Pteropus rufus); 185. Seychelles Flying Fox (Pteropus seychellensis); 186. Greater Mascarene Flying Fox (Pteropus nigen; 187. Aru Flying Fox (Pteropus aruensis); 188. Kai Flying Fox (Pteropus keyensis); 189. Black-bearded Flying Fox (Pteropus melanopogon); 190. South Moluccan Flying Fox (Pteropus chrysoproctus); 191. North Moluccan Flying Fox (Pteropus caniceps).
Interspecific hybridization and island colonization history, not rarity, most strongly affect the genetic diversity in a clade of Mascarene-endemic trees
<p>Many factors shape the genetic diversity of island-endemic trees, with important implications for conservation. Oceanic island-endemic lineages undergo an initial founding bottleneck during the colonization process and subsequently accumulate diversity following colonization. Moreover, many island endemics occur in small populations and are further threatened by anthropogenic factors that cause population declines, making them susceptible to losses in genetic diversity through genetic drift, inbreeding, and bottlenecks. <a name="_Hlk80963234"></a>However, life-history traits commonly found in trees, such as outcrossing mechanisms, long lifespans, and a propensity for interspecific hybridization, may help buffer against losses of genetic variation. To assess the relative importance of colonization history, rarity, and distribution in shaping genetic diversity of island-endemic trees, we conducted a<a name="_Hlk80964566"></a> comparative population genomic analysis of 13 species of <em>Diospyros</em> (Ebenaceae) endemic to the Mascarene Islands that differ in island colonization history, distribution, population size, and IUCN threat status. We genotyped 328 individuals across the islands using 2b-RADseq, compared genetic diversity both among and within species, and assessed patterns of genetic structure. <a name="_Hlk80965008"></a>Genetic diversity did not vary significantly by IUCN status, but we found that species that co-occur with others on the same intermediate-aged island (Mauritius) had much greater genetic diversity than those that occur solitarily on an island (Réunion and Rodrigues), likely because of greater interspecific hybridization among species with overlapping distributions and processes related to time since island colonization. Results presented here were used to <a name="_Hlk80991503"></a>determine priority localities for <em>in situ</em> and <em>ex situ</em> conservation efforts to maximize the genetic diversity of each Mascarene <em>Diospyros</em> species.</p>
FIGURE 17. Coelorinchus yurii, TAU P.11602 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 17. Coelorinchus yurii, TAU P.11602, holotype, 154 mm HL. A. Dorsal view of head. B. Ventral view of head and trunk.
FIGURE 15. Coelorinchus paraboliceps, IOM M.004–003, holotype. A in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 15. Coelorinchus paraboliceps, IOM M.004–003, holotype. A. Terminal scute of snout (arrowed), dorsal view. B. Preoral region. Scale bars: A, 1.5 mm. B. 5.0 mm.
FIGURE 16. Coelorinchus yurii, IOM M.003–017 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 16. Coelorinchus yurii, IOM M.003–017, non-type specimen. A. Lateral view of head. B. Preoral region. C. Periproct. D, E. Nasal fossa and its squamation. Scale bars: A–C, 10.0 mm. D, 1.2 mm. E, 5.0 mm.
FIGURE 12 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 12. Coelorinchus spp., squamation of opercle (A, B) and of suborbital shelf (C, D). A, C. C. yurii, IOM M.003– 017, non-type specimen. B, D. C. mascarenus, IOM M.011–007, holotype. Scale bars: 5.0 mm.
FIGURE 11 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 11. External evidence of light organ in Coelorinchus mascarenus, IOM M.011–007, holotype (A) and C. braueri, IOM 01864 (B). Scale bars: A, 3.0 mm. B, 2.0 mm
FIGURE 14. Coelorinchus paraboliceps, IOM M.004–003 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 14. Coelorinchus paraboliceps, IOM M.004–003, holotype, 120 mm HL. A. Lateral view of head. B. Dorsal view of head. C. Ventral view of head.
FIGURE 13 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 13. Coelorinchus spp., head, frontal view, suborbital shelf arrowed. A. C. mascarenus, IOM M.011–007, holotype. B. C. yurii, IOM M.003–017, non-type specimen. Scale bars: 10.0 mm.
FIGURE 7 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 7. Coelorinchus spp., squamation of flank between origin of second dorsal fin and lateral line (A, C, E) and of tail behind anterior third of second dorsal-fin base (B, D, F). A, B. C. amirantensis, IOM M.007–001, paratype. C, D. C. paraboliceps, IOM M.004–003, holotype. E, F. C. yurii, IOM M.003–017, non-type specimen. Scale bars: 5.0 mm.
FIGURE 10. Coelorinchus mascarenus, IOM M.011–007 in Revision of the Grenadier Genus Coelorinchus (Teleostei: Macrouridae) from the Mascarene Ridge, Western Indian Ocean, with Description of Two New Species
FIGURE 10. Coelorinchus mascarenus, IOM M.011–007, holotype, 91 mm HL. A. Lateral view of head. B. Dorsal view of head. C. Preoral region.
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Allen Brain Atlas
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