Publications

9097 to 9108 of 14011 results

1. Temperature dependence and acclimatory response of amylase in the High Arctic springtail Onychiurus arcticus (Tullberg) compared with the temperate species Protaphorura armata (Tullberg)

   Amylolytic activity was measured in whole body homogenates of High Arctic (Onychiurus arcticus) and temperate (Protaphorura armata) springtails (Collembola: Onychiuridae) in the temperature range 5–55°C. A pH of ca. 8 […]

   Read more of: Temperature dependence and acclimatory response of amylase in the High Arctic springtail Onychiurus arcticus (Tullberg) compared with the temperate species Protaphorura armata (Tullberg)

2. Distribution and biogeography of oribatid mites (Acari: Oribatida) in Antarctica, the sub-Antarctic islands and nearby land areas

   Oribatid mites are an ancient group of cosmopolitan terrestrial arthropods with limited trans-oceanic dispersal abilities. They provide an opportunity to answer questions concerning the role played by Gondwanaland, either as […]

   Read more of: Distribution and biogeography of oribatid mites (Acari: Oribatida) in Antarctica, the sub-Antarctic islands and nearby land areas

3. Temperature and embryonic development in relation to spawning and field occurrence of larvae of three Antarctic echinoderms

   The effects of temperature on development and viability were measured at 14 levels between -2{deg}C and +3{deg}C on embryos of two asteroids (Odontaster validus and Odontaster meridionalis) and an echinoid […]

   Read more of: Temperature and embryonic development in relation to spawning and field occurrence of larvae of three Antarctic echinoderms

4. The timing of reproduction in the Antarctic limpet Nacella concinna (srebel, 1908) (Patellidae) at Signy Island, in relation to environmental variables

   Read more of: The timing of reproduction in the Antarctic limpet Nacella concinna (srebel, 1908) (Patellidae) at Signy Island, in relation to environmental variables

5. Seasonality of reproduction in the cushion star Odontaster validus at Signy Island, Antarctica

   The reproductive and larval biology of the common Antarctic cushion-star Odontaster validus Koehler (Echinodermata: Asteroidea) were studied in a shallow-water population at Signy Island in the maritime Antarctic. The gonad […]

   Read more of: Seasonality of reproduction in the cushion star Odontaster validus at Signy Island, Antarctica

6. Aspects of the biology of the giant form of Sthenoteuthis oualaniensis (Cephalopoda ommastrephidae) from the Arabian Sea

   An investigation was carried out on the recently discovered ‘giant’ extra large (XL) form of the squid Sthenoteuthis oualaniensis from the Arabian Sea. The sample consisted of 2 males, which […]

   Read more of: Aspects of the biology of the giant form of Sthenoteuthis oualaniensis (Cephalopoda ommastrephidae) from the Arabian Sea

7. New national and regional bryophyte records, 37

   Read more of: New national and regional bryophyte records, 37

8. Traveling ionospheric disturbances in the Weddell Sea Anomaly associated with geomagnetic activity

   We present observations from the Falkland Islands Super Dual Auroral Radar Network radar of the propagation of HF radio waves via the Weddell Sea Ionospheric Anomaly (WSA), a region of […]

   Read more of: Traveling ionospheric disturbances in the Weddell Sea Anomaly associated with geomagnetic activity

9. Extinction risk and conservation of the world’s sharks and rays

   The rapid expansion of human activities threatens ocean-wide biodiversity. Numerous marine animal populations have declined, yet it remains unclear whether these trends are symptomatic of a chronic accumulation of global […]

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10. Observation and simulations of winds and temperatures in the Antarctic thermosphere for August 2–10, 1992

    Optically derived upper thermospheric wind and temperature data, collected at Antarctic stations at South Pole (L = 14), Mawson (L = 9.3), and Halley (L = 4.6), and averaged over […]

    Read more of: Observation and simulations of winds and temperatures in the Antarctic thermosphere for August 2–10, 1992

11. Surface lowering of the ice ramp at Rothera Point, Antarctic Peninsula, in response to regional climate change

    Level-line surveys at a number of sites on the Antarctic Peninsula since the early 1970s have shown a lowering of the ice surface elevation in areas where the climate is […]

    Read more of: Surface lowering of the ice ramp at Rothera Point, Antarctic Peninsula, in response to regional climate change

12. Rapid thinning of Pine Island Glacier in the early Holocene

    Pine Island Glacier, a major outlet of the West Antarctic Ice Sheet, has been undergoing rapid thinning and retreat for the past two decades. Here we demonstrate, using glacial-geological and […]

    Read more of: Rapid thinning of Pine Island Glacier in the early Holocene