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161 results for “Andaman and Nicobar Islands”
Fig. 6 in Decadal status of Acanthaster planci (Linnaeus, 1758) along the coral reef habitat of Andaman and Nicobar Islands
Fig. 6 — Substrate specificity of A. planci (CoTS) in Andaman and Nicobar Islands (a - Dorsal view of A. planci; b - Ventral view of A. planci; c & d - Animal grazing on Acroporidae corals; e - Animal grazing on Poritidae corals; f - Animal in coral crevice; g - Animal grazing on sponges and algae; and h - Feeding scar on aroporid corals due to A. planci
Fig. 4 in Decadal status of Acanthaster planci (Linnaeus, 1758) along the coral reef habitat of Andaman and Nicobar Islands
Fig. 4 — PCA of A. planci (CoTS) population in Andaman and Nicobar Islands (N&MA- North & Middle Andaman, SA- South Andaman, N-Nicobar)
Figure 4 in Addition of three Ascidian species to Indian waters from Andaman and Nicobar Islands
Figure 4. Microcosmus bitunicatus Monniot & Monniot, 2001. a. Preserved specimen. b. Double test. c. Dorsal tubercle. d. Branchial sac with folds. e. Gut loop and gonad in the body wall. f. Opening of gonad. (Abbreviation: DL: Dorsal Lamina, DT: Dorsal Tubercle, E: Endostyle, G: Gonad, GL: Gut loop, GO: Opening of Gonad, L: Liver, S: Stomach, T1: First Tunic/Outer tunic, T2: Second Tunic, each number is denoting each branchial fold), (Scale: c– 1mm; f– 5mm, 7.80x).
Figure 3. Cnemidocarpa hemprichi Hartmeyer, 1916 in Addition of three Ascidian species to Indian waters from Andaman and Nicobar Islands
Figure 3. Cnemidocarpa hemprichi Hartmeyer, 1916: a. Preserved specimen. b. Branchial sac with folds. c. branchial tentacles. d. Dorsal tubercle. e. Gut loop on the left side of the body along with gonad. f. Stomach. (Abbreviation: DL: Dorsal Lamina, DT: Dorsal Tubercle, E: Endostyle, EC: Endocarp, G: Gonad, S: Stomach, each number denoting each branchial fold), (Scale: b– 2mm, 9.08x; c– 1mm; d– 500μm, 42.7x; e– 2mm, 13.5x; f– 1mm, 27.2x).
Figure 2 in Addition of three Ascidian species to Indian waters from Andaman and Nicobar Islands
Figure 2. Polycarpa reniformis (Sluiter, 1904): a. Preserved specimen. b. Dorsal tubercle. c. Branchial sac with branchial folds. d. Stigmata. e. Gut loop on the left side of the body along with gonads. f. Gonads. (Abbreviation: DL: Dorsal Lamina, DT: Dorsal Tubercle, E: Endostyle, EC: Endocarp, G: Gonad, GL: Gut loop, ST: Stigmata, each number is denoting each branchial fold), (Scale: b– 1mm, 28.4x; c– 2mm, 11x; d– 500μm, 37.2x; e– 5mm, 7.80x; f– 1mm, 28x).
Figure 6 in New distributional records of family Vespidae (Insecta: Hymenoptera) from Great Nicobar Biosphere Reserve, Andaman and Nicobar Islands, India
Figure 6. Polistes (Polistella) stigma sauensis Peterson, ♂. Material examined: India: Andaman and Nicobar Island, Nicobar Watch Tower, 1♂, 8.xi.2018, Coll. K.C. Gopi and Party, NZC Regd. No. 25172/H3. Distribution: India: Andaman and Nicobar Islands (Das and Gupta, 1989).
Figure 9 in Additional records of Mantodea and Phasmida from Andaman and Nicobar Islands
Figure 9(a, b, c, d, e). Sipyloidea sp., male, 10. Ramulus sp., female, 11a. Ph. (Pul.) bioculatum, male, 11(b, c). Ph. (Pul.) bioculatum, female.
Figure 4 in Occurrence and distribution of tetraodontiform fishes of the Andaman and Nicobar Islands, India
Figure 4. Non-randomized cumulative species accumulation curves with sites ordered from southern Nicobar to northern Andaman Islands. The reported number of species was highest at sites located at Nicobar and South Andaman regions, where they contribute to 17 out of the 25 species reported. Among islands towards higher latitudes, the curve shows an increase at the Japanese bunker site after which only 3 species were added to the curve for 39 sampled islands in middle and North Andaman regions.
Figure 3 in Occurrence and distribution of tetraodontiform fishes of the Andaman and Nicobar Islands, India
Figure 3. Some species of fish belonging to the order Tetraodontiformes from the Andaman and Nicobar Islands. A. Oxymonacanthus longirostris. B. Ostracion cubicus. C. Ostracion melegris.D. Arothron nigropunctatus. E. Arothron stellatus. F. Canthigaster petersii.
Data from: Species-area relationships in the Andaman and Nicobar islands emerge because rarer species are disproportionately favored on larger islands
<p>The Island Species-Area relationship (ISAR) describes how the number of species increases with increasing size of an island (or island-like habitat), and is of fundamental importance in island biogeography and conservation. Here, we use a framework based on individual-based rarefaction to infer whether ISARs result from passive sampling, or whether some processes are acting beyond sampling (e.g., disproportionate effects and/or habitat heterogeneity). Using data on total and relative abundances of four taxa (birds, butterflies, amphibians and reptiles) from multiple islands in the Andaman and Nicobar archipelago, we examine how different metrics of biodiversity (total species richness, rarefied species richness, and abundance-weighted effective numbers of species emphasizing common species) vary with island area. Total species richness increased for all taxa, as did rarefied species richness controlling for a given sampling effort. This indicates that the ISAR did not result because of passive sampling, but that instead, some species were disproportionately favored on larger islands. For birds, frogs and lizards, this disproportionate effect was only associated with species that were rarer in the samples, but for butterflies, both more common and rarer species were affected. Furthermore, for the two taxa for which we had plot-level data (reptiles and amphibians), within-island β-diversity did not increase with island size, suggesting that within island compositional effects were unlikely to be driving these ISARs. Overall, our results indicate that the ISARs of these taxa are most likely driven by disproportionate effects, that is, where larger islands are important sources of biodiversity beyond a simple sampling expectation, especially through their influence on rarer species, thus emphasizing their role in the preservation and conservation of species.</p>
Fig. 7 in A new species of the genus Gekko Laurenti, 1768 (Squamata: Gekkonidae) from the Nicobar Archipelago, with an overview of congeners from the Andaman and Nicobar Islands
Fig. 7. Gekko stoliczkai sp. nov. in life from Great Nicobar.
Fig. 3 in Decadal status of Acanthaster planci (Linnaeus, 1758) along the coral reef habitat of Andaman and Nicobar Islands
Fig. 3 — Depth-wise occurrence of A. planci (CoTS) in Andaman and Nicobar Islands
Fig. 2 in Decadal status of Acanthaster planci (Linnaeus, 1758) along the coral reef habitat of Andaman and Nicobar Islands
Fig. 2 — Zone-wise occurrence map of A. planci (CoTS) in Andaman and Nicobar Islands
Fig. 1 in Decadal status of Acanthaster planci (Linnaeus, 1758) along the coral reef habitat of Andaman and Nicobar Islands
Fig. 1 — Occurrence of A. planci (CoTS) in Andaman and Nicobar Islands
Fig. 5 in Decadal status of Acanthaster planci (Linnaeus, 1758) along the coral reef habitat of Andaman and Nicobar Islands
Fig. 5 — Substrate specificity of A. planci (CoTS) in reef habitat of Andaman and Nicobar Islands
Figure 1 in Addition of three Ascidian species to Indian waters from Andaman and Nicobar Islands
Figure 1. Study areas of Andaman and Nicobar Islands.
Figure 5 in New distributional records of family Vespidae (Insecta: Hymenoptera) from Great Nicobar Biosphere Reserve, Andaman and Nicobar Islands, India
Figure 5. Polistes (Polistella) stigma galathea Peterson, ♀.
Figure 8 in New distributional records of family Vespidae (Insecta: Hymenoptera) from Great Nicobar Biosphere Reserve, Andaman and Nicobar Islands, India
Figure 8. Vespa tropica haematodes Bequaert, ♀.
Figure 3 in New distributional records of family Vespidae (Insecta: Hymenoptera) from Great Nicobar Biosphere Reserve, Andaman and Nicobar Islands, India
Figure 3. Antodynerus flavescens flavescens (Fabricius), ♀.
Figure 7 in New distributional records of family Vespidae (Insecta: Hymenoptera) from Great Nicobar Biosphere Reserve, Andaman and Nicobar Islands, India
Figure 7. Vespa affinis affinis (Linnaeus), ♀.
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