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Friday, May 15th, 2015
| Time | Event | ||
| 4:46a | [Ichthyology • 2015] Whole-Body Endothermy in A Mesopelagic Fish, the Opah, Lampris guttatus
ABSTRACT Endothermy (the metabolic production and retention of heat to warm body temperature above ambient) enhances physiological function, and whole-body endothermy generally sets mammals and birds apart from other animals. Here, we describe a whole-body form of endothermy in a fish, the opah (Lampris guttatus), that produces heat through the constant “flapping” of wing-like pectoral fins and minimizes heat loss through a series of counter-current heat exchangers within its gills. Unlike other fish, opah distribute warmed blood throughout the body, including to the heart, enhancing physiological performance and buffering internal organ function while foraging in the cold, nutrient-rich waters below the ocean thermocline. Nicholas C. Wegner, Owyn E. Snodgrass, Heidi Dewar and John R. Hyde. 2015. Whole-Body Endothermy in A Mesopelagic Fish, the Opah, Lampris guttatus. Science. 348(6236); 786-789 DOI: 10.1126/science.aaa8902 Behold The First Fully Warm-Blooded Fish Known To Science http://io9.com/behold-the-first-fully-wa Scientists discover first warm-bodied fish http://t.co/J5Qd1a3dxJ Rarely Seen Moonfish, Size of Manhole Cover, Caught on Camera http://on.natgeo.com/1Hh8I1N via @NatGeo Scientists discover first warm-bodied fish http://news.sciencemag.org/biology/2015/0 | ||
| 10:18a | [PaleoMammalogy • 2015] Middle Miocene Bovidae from Mae Moh Basin, Northern Thailand: the First Record of the Genus Eotragus from Southeast Asia; Eotragus lampangensis
We describe the first bovid fossils from the late Middle Miocene (13.4-13.2 Ma) of the Mae Moh Basin of Northern Thailand, and assign the material to the new species Eotragus lampangensis sp. nov., Eotragus cf. lampangensis, and an indeterminate bovid. Our material represents the first report of Eotragus from Southeast Asia, thus greatly extending the geographic distribution of this genus across the Old World continents. While comparisons of the Southeast Asian specimens with abundant material of E. clavatus from Sansan (France) and E. aff. clavatus from Tarazona de Aragón (Spain) indicate a high degree of intraspecific variation within single species of Eotragus, the existence of two distinct taxa at Mae Moh remains a possibility. Based on previous carbon isotope studies of Mae Moh herbivore tooth enamel, Eotragus lampangensis sp. nov. foraged predominantly in an ecotone between grassland and forest. Key words: Mammalia, Bovidae, Eotragus, Miocene, Mae Moh Basin, Thailand, Southeast Asia. Eotragus lampangensis sp. nov. Etymology: From the geographic location of the Mae Moh coal mine in the Lampang Province of Northern Thailand. Holotype: UPP MM-68, a left horn core with preserving part of the frontal bone. Type locality: Mae Moh coal mine, Northern Thailand. Kantapon Suraprasit, Yaowalak Chaimanee, Olivier Chavasseau, and Jean-Jacques Jaeger. 2015. Middle Miocene Bovidae from Mae Moh Basin, Northern Thailand: the First Record of the Genus Eotragus from Southeast Asia. Acta Palaeontologica Polonica. 60(1); 67-78. doi: 10.4202/app.2012.0061 สัตว์เคี้ยวเอื้องโบราณ (Primitive bovid) ได้ถูกค้นพบที่เหมืองแม่เมาะ จังหวัดลำปาง อายุประมาณ 13.2 -13.4 ล้านปี (สมัยไมโอซีนตอนกลาง) จากการศึกษาและวิจัยพบว่ามันเป็นชนิดใหม่ข Reconstructed image drawn by Thita Krutchuen |
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