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124 results for “Mekong River”
Distribution. Mainland South-east Asia in S Laos (N limit is 16° 23' N), SC Vietnam (N limit is 14° 30' N), and E Cambodia (Ratanakiri and Mondulkiri provinces); most likely the W limitis the Mekong River, but further studies are needed to confirm this. Records in Vietnam N to 16° 37° N are questionable. in Cercopithecidae
Distribution. Mainland South-east Asia in S Laos (N limit is 16° 23' N), SC Vietnam (N limit is 14° 30' N), and E Cambodia (Ratanakiri and Mondulkiri provinces); most likely the W limitis the Mekong River, but further studies are needed to confirm this. Records in Vietnam N to 16° 37° N are questionable.
Distribution. Mainland South-east Asia in S Myanmar, S Thailand, S Laos, Cambodia (W of Mekong River), and the S tip of Vietnam. Range limit of this species to the E might be the Mekong River. in Cercopithecidae
Distribution. Mainland South-east Asia in S Myanmar, S Thailand, S Laos, Cambodia (W of Mekong River), and the S tip of Vietnam. Range limit of this species to the E might be the Mekong River.
Distribution. SW China, in SE Xizang Autonomous Region (= Tibet) and NW Yunnan Province (fragmented populations in the Yun Ling Mts), W of the Yangtze River and E of the Mekong River. in Cercopithecidae
Distribution. SW China, in SE Xizang Autonomous Region (= Tibet) and NW Yunnan Province (fragmented populations in the Yun Ling Mts), W of the Yangtze River and E of the Mekong River.
FIGURE 5 in Channa auroflammea, a new species of snakehead fish of the Marulius group from the Mekong River in Laos and Cambodia (Teleostei: Channidae)
FIGURE 5. Comparison of colour patterns of scales in mid-lateral black blotches in members of the Marulius group. (A) Channa pseudomarulius, 164 mm SL, not preserved, Kerala, Pamba River; (B) Channa marulius, BMNH 2017.5.17.1, 226 mm SL, Myanmar, Rakhine State; (C) C. aurolineata, ca. 500 mm SL, not preserved, Myanmar, Kachin State, Hkamti market; (D) C. auroflammea, ca. 550 mm SL, not preserved, Cambodia, Stung Treng, fish market.
FIGURE 4 in Channa auroflammea, a new species of snakehead fish of the Marulius group from the Mekong River in Laos and Cambodia (Teleostei: Channidae)
FIGURE 4. Comparison of ranges of key meristic counts among four members of the Marulius group. Thin bars indicate counts from aberrant specimens included in ranges. Note that counts for C. auroflammea are generally lower than those for its genetically and geographically closest species, C. aurolineata. Map illustrates known and/or expected geographical distributions for each species, from west to east: C. pseudomarulius, C. marulius, C. aurolineata, and C. auroflammea.
FIGURE 3 in Channa auroflammea, a new species of snakehead fish of the Marulius group from the Mekong River in Laos and Cambodia (Teleostei: Channidae)
FIGURE 3. Channa auroflammea. (A) ca. 550 mm SL, alive, not preserved, Cambodia, Stung Treng, fish market. Note bright orange gular area of head and ventral half of abdominal and caudal body, small white spots on body and median fins. (B) ca. 500 mm SL, not preserved but DNA sampled, Laos: Nam Ngiep watershed, NamChae. Note very dark overall colouration and absence of orange colour on ventral half (photo: M. Kottelat).
FIGURE 1 in Channa auroflammea, a new species of snakehead fish of the Marulius group from the Mekong River in Laos and Cambodia (Teleostei: Channidae)
FIGURE 1. Map of the Mekong River Basin showing approximate collection localities of Channa auroflammea specimens and DNA samples examined in this study. Inset shows regional political boundaries of mainland Southeast Asia: Laos (L), Thailand (T), Cambodia (C), and Vietnam (V).
FIGURE 2 in Channa auroflammea, a new species of snakehead fish of the Marulius group from the Mekong River in Laos and Cambodia (Teleostei: Channidae)
FIGURE 2. Channa auroflammea. (A) BMNH 2015.1.29.13, holotype, 600 mm SL; Cambodia: Ban Lung market; (B) CMK 23842, paratype, 253 mm SL; Laos: Nam Ngum reservoir; (C) ZRC 54747, paratype, 143 mm SL, Laos: Nam Gnouang. (D) CMK, non-type, 81.5 mm SL, Laos: Xe Banghiang (photo: M. Kottelat).
FIGURE 2 in A new species of Dwarf Japalura sensu lato (Reptilia: Squamata: Agamidae) from the upper Mekong River in Eastern Tibet, China, with notes on morphological variation, distribution, and conservation of two congeners along the same river
FIGURE 2. Holotype male (left; KIZ 027619) and paratopotype female (right, KIZ 027617) of Japalura drukdaypo sp. nov. in life. Photos by Kai WANG.
FIGURE 6 in A new species of Dwarf Japalura sensu lato (Reptilia: Squamata: Agamidae) from the upper Mekong River in Eastern Tibet, China, with notes on morphological variation, distribution, and conservation of two congeners along the same river
FIGURE 6. Habitat at the type localities of Japalura drukdaypo sp. nov. in Kanuo (A and B) and Chaya (C and D), Chamdo, Tibet, China. Photos by Kai WANG.
FIGURE 7 in A new species of Dwarf Japalura sensu lato (Reptilia: Squamata: Agamidae) from the upper Mekong River in Eastern Tibet, China, with notes on morphological variation, distribution, and conservation of two congeners along the same river
FIGURE 7. Destructive habitat alteration resulting from construction activities along the upper Mekong River. (A) Construction at the type localities of Japalura vela; (B) agricultural plantations near the type locality of J. vela in Markam County, Tibet; and (C) road construction close to the type locality of J. vela in Markam, Tibet. Photos by Kai WANG.
FIGURE 4 in A new species of Dwarf Japalura sensu lato (Reptilia: Squamata: Agamidae) from the upper Mekong River in Eastern Tibet, China, with notes on morphological variation, distribution, and conservation of two congeners along the same river
FIGURE 4. Dorsal (1) and ventral (2) comparisons of females among Japalura drukdaypo sp. nov. (paratopotype KIZ 027617), J. brevicauda (paratype ZMB 28932), and J. vela (KIZ 027671), showing the differences in relative tail length, relative limb length, and texture of ventral body scales. Individual images are not to scale. Dorsal view of J. vela (B1) was horizontally rotated 180˚ to align with other figures. Photos by Kai WANG and Frank TILLACK.
FIGURE 1 in A new species of Dwarf Japalura sensu lato (Reptilia: Squamata: Agamidae) from the upper Mekong River in Eastern Tibet, China, with notes on morphological variation, distribution, and conservation of two congeners along the same river
FIGURE 1. Distribution of Japalura sensu lato in the Hengduan Mountain Region in Southwest China. Numbers represent new localities for Japalura vela (1–5) and J. iadina (6), which are: (1) Tongsha, Markam, Tibet; (2) Rumei Township, Markam Prefecture, Tibet; (3) Xilu, Deqin County, Yunnan Province; (4) Foshan, Deqin County, Yunnan Province; (5) Xidang, Deqin County, Yunnan Province; and (6) Yunling, Deqin County, Yunnan Province.
Bulk and amino acid nitrogen specific isotope data from particulate organic matter and mesozooplankton (1000-2000 µm) from the Mekong River plume and southern South China Sea
<p><strong><span><span>The mean trophic position (TP) of mesozooplankton largely determines how much mass and energy is available for higher trophic levels like fish. Unfortunately, the ratio of herbivores to carnivores in mesozooplankton is difficult to identify in field samples. Here we investigated changes in the mean TP of mesozooplankton in a highly dynamic environment encompassing four distinct habitats in </span></span></strong>the southern South China Sea:<strong> </strong><span>the </span>Mekong River plume, coastal upwelling region, shelf waters, and offshore oceanic waters<strong><span>. </span></strong><span>We used a set of parameters derived from bulk and amino acid nitrogen stable isotopes from particulate organic matter (POM) and four mesozooplankton size fractions to identify changes in the nitrogen source and structure of the planktonic food web across these habitats.</span> We found clear indications of a shift in N sources for biological production from nitrate in near-coastal waters towards an increase in diazotroph-N inputs in oceanic waters where diazotrophs shaped the phytoplankton community. The shift in N source was accompanied by a lengthening of the food chain (increase in the TP), which may provide further support for the connection between diazotrophy and the indirect routing of N through the marine food web. Our combined bulk and amino acid δ<sup>15</sup>N approach also allowed us to estimate the trophic enrichment (TE) of mesozooplankton across the entire regional ecosystem. When put in the context of literature values, our high TE of 5.1‰ suggested a link between ecosystem heterogeneity and the less efficient transfer of mass and energy across trophic levels.</p>
Figure 20 in Four new species of Parabathynellidae (Bathynellacea, Syncarida) from the interstitial environment of the Mekong River
Figure 20. Mekongbathynella jayavarthoni sp. n. (Holotype: ♀). (a), uropod (dorsal); (b), pleotelson and furcal rami (dorsal); (c), pleotelson, uropod and furcal ramus (lateral). Scale bars = 0.05 mm.
Figure 19 in Four new species of Parabathynellidae (Bathynellacea, Syncarida) from the interstitial environment of the Mekong River
Figure 19. Mekongbathynella jayavarthoni sp. n. (Holotype: ♀; allotype: ♂). (a), thoracopod VII ♂ (frontal); (b), thoracopod VIII ♀ (ventral); (c), thoracopod VIII ♀ (lateral); (d), thoracopod VIII ♂ (inner lateral); (e), right and left thoracopods VIII ♂ (ventral). Scale bars = 0.05 mm.
Figure 17 in Four new species of Parabathynellidae (Bathynellacea, Syncarida) from the interstitial environment of the Mekong River
Figure 17. Mekongbathynella jayavarthoni sp. n. (Holotype: ♀). (a), mandible (dorsal); (b), mandible (inner lateral); (c), maxillule (dorsal); (d). maxilla (dorsal); (e), thoracopod I (frontal); (f), thoracopod II (frontal). Scale bars = 0.05 mm.
Figure 13 in Four new species of Parabathynellidae (Bathynellacea, Syncarida) from the interstitial environment of the Mekong River
Figure 13. Mekongbathynella jayavarmani sp. n. (Holotype: ♀). (a), thoracopod IV (frontal); (b), thoracopod V (frontal); (c), thoracopod VI (frontal); (d), thoracopod VIII (ventral). Scale bar = 0.05 mm.
Figure 12 in Four new species of Parabathynellidae (Bathynellacea, Syncarida) from the interstitial environment of the Mekong River
Figure 12. Mekongbathynella jayavarmani sp. n. (Holotype: ♀). (a), maxillule (dorsal); (b). maxilla (dorsal); (c), thoracopod I (frontal); (d), thoracopod II (frontal); (e), thoracopod III (frontal). Scale bars = 0.05 mm.
Figure 10 in Four new species of Parabathynellidae (Bathynellacea, Syncarida) from the interstitial environment of the Mekong River
Figure 10. Mekongbathynella pienensis sp. n. (Holotype: ♀). (a), uropod (dorsal); (b), pleotelson and furcal rami (dorsal); (c), pleotelson, uropod and furcal ramus (lateral). Scale bars = 0.05 mm.
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