2,729 research outputs found
Encounter of lithodid crab Paralomis birsteini on the continental slope off Antarctica, sampled by ROV
No full textA population of stone crab (Lithodidae) was encountered on the continental slope off Antarctica in the Bellingshausen Sea between 1123m and 1304m water depths using the ROV-Isis during leg 166 of the RV James Clark Ross, in January 2007. Specimens were video recorded and one specimen was retrieved by ROV for morphological and molecular identification. Based on morphology and molecular data from the mitochondrial COI gene, this specimen identified as P. birsteini, Macpherson, 1988. The significance of the molecular data and their implications for biogeography and evolution of lithodids in the Southern Ocean are briefly discussed
Four new species of the family Lithodidae (Crustacea: Decapoda) from the collections of the National Museum of Natural History, Smithsonian Institution
No full textFIGURE 2. Paralomis alcockiana n. sp. a–f: male holotype, 44 mm CL (USNM 269032), South Carolina: 31°20'N, 79°05'W, 570 m. (a) anterior carapace, lateral. (b) rostral spines, dorsal. (c) right antennal acicle, dorsal. (d) abdomen. (e) right chela, lateral. (f) whole organism, dorsal. Scale bar = 1 mm for a–c; 5 mm for d–f.Published as part of Hall, Sally & Thatje, Sven, 2009, Four new species of the family Lithodidae (Decapoda: Anomura) from the collections of the National Museum of Natural History, Smithsonian Institution, pp. 31-47 in Zootaxa 2302 on page 34, DOI: 10.5281/zenodo.19175
Temperature-driven biogeography of the deep-sea family Lithodidae (Crustacea: Decapoda: Anomura) in the Southern Ocean
No full textSpecies’ distributions are dynamic and are linked to the changing physical environment. Temperature is considered to be a major factor influencing biogeography, especially in ectotherms such as the family Lithodidae. Lithodids are rare amongst decapods in their ability to inhabit the higher latitudes of the Southern Ocean; however, they are usually found in locations where water temperature is above 0.5°C. This study, for the first time, provides a baseline indication of the limits of the lithodid distribution around Antarctica, which will be instrumental in any future work on range extensions in this group. The distribution of lithodids is likely to change as temperatures along the West Antarctic Peninsula continue to rise, and range extensions by durophagous predators, such as the lithodids, are regarded as a potential threat to the unique structure of Antarctic continental-shelf ecosystems
Science Lecture Hall
No full textBldg #: 6; Name(s): Science Lecture Hall; Function(s): Lecture hall; Completed: 1928; Razed: 1984. Reverse Side: Tapy Hall in background
Bratton Hall I - Economics
No full textBldg #: 57; Name(s): Bratton Hall I; Function(s): Economics Dept.; Completed: 1952; Architect: Meem, Zehner, Holien & Associates; UNM Style: Spanish-Pueblo Revival Phase II B; Preservation Listing: --. Reverse side: New Law School - 196
Mitchell Hall - looking southeast
No full textBldg #: 23; Name(s): Mitchell Hall, Classroom Building; Function(s): Classrooms; Completed: 6/27/52; Architect: Meem, Zehner, Holien & Associates; UNM Style: Spanish-Pueblo Revival Phase II B; Preservation Listing: --. View from sidewalk of lawn, trees, and bushes
Dormitory - Yatoka Hall - wooden posts and tree
No full textBldg #: 7; Name(s): Yatoka Hall; Function(s): Men's Dormitory, Business Administration, classrooms, coffee shop; Completed: 1928; Demolished: 1984; Architect: Gaastra, Gladding & Johnson; UNM Style: --; Preservation Listing: --. Front of building, tree, and wooden posts
Castetter Hall - exterior - fence and greenhouse
No full textBldg #: 21; Name(s): Castetter Hall; Function(s): Biology Dept.; Completed: 1952; Architect: Meem, Zehner, Holien & Associates; UNM Style: Spanish-Pueblo Revival Phase II B; Preservation Listing: --. Low fence and small greenhouse
Engineering - Civil - Tapy Hall - rear driveway
No full textBldg #: 118; Name(s): Tapy Hall; Function(s): Electrical Engineering; Completed: 11/24/54; Architect: Meem, Zehner, Holien, and Associates; UNM Style: --; Preservation Listing: --. Reverse side: square plates N-S holding building together- walls from falling in. Tree, lawn, sidewalk, and driveway
The effect of hyperthermia with localised head and neck cooling on neuromuscular function
No full textIntroduction: hyperthermia reduces volitional force production, voluntary muscle activation and agonist-electromyography (EMG) during a sustained maximal voluntary contraction (MVC) [1], [2]. This reduction in neuromuscular function may explain a reduced exercise capacity in the heat. Cooling of the neck has been shown to improve running capacity in the heat [3]; however the mechanism is unknown. The aim of the study was to investigate whether localised cooling of the head and neck during hyperthermia would affect neuromuscular function following 60 min of cycling in the heat. Methods: fourteen male participants exercised on a cycle ergometer for 60 min at 50% ̇V̇O2max in three experimental conditions; hot (35 °C, 50% rh; HOT), hot with head and neck cooling (35 °C, 50% rh; HOTcooling) and control (18 °C, 50% rh; CON). Immediately after the cycling bout, participants performed a 120-s sustained isometric MVC of the knee extensors of their dominant limb. Neuromuscular activation was assessed during the MVC at 5, 30, 90 and 120-s by superimposing supra-maximal triplet (3 impulses at 100 Hz) contractions by electrical stimulation of the femoral nerve, and calculating the central activation ratio (CAR). EMG amplitude (normalised to maximal M-wave) of the 3 superficial quadriceps heads was recorded throughout the MVC. Rectal temperature (Tre) was measured throughout each condition.Results: Tre was raised in both the HOT (39.27 (0.52) °C) and HOTcooling (39.19 (0.56) °C) trials vs CON (38.07 (0.28) °C) immediately post cycling (P <0.001) and remained elevated during the 120-s MVC. Force declined throughout the MVC in all conditions (Fig 1). The decline in force was on average 18 and 13.6% greater in HOT and HOTcooling respectively compared to CON (Fig.1; P <0.001 for both). This was similar for voluntary activation, with significant reductions in HOT vs CON trials across all time points (P <0.001). Normalised agonist EMG showed significant differences between HOT vs CON throughout the first 60-s of contraction; thereafter a reduced neural drive in all conditions was similar.Discussion: cooling had no physiological effect on Tre during hyperthermia trials. HOT appeared to show the greatest decline in voluntary force and was associated with a greater decline in CAR and normalised EMG in comparison to CON. The higher force output for HOTcooling may be explained by improved neural drive of the central nervous system to voluntarily activated muscles.Conclusion: localised head and neck cooling improves neuromuscular function of the knee extensors during a sustained MVC under hyperthermic conditions. <br/
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