Sökning: "Echinoderms"

Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet Echinoderms.

1. 1. Managing sea cucumber fisheries and aquaculture : Studies of social-ecological systems in the Western Indian Ocean

   Författare :Hampus Eriksson; Maricela de la Torre-Castro; Juan Carlos Castilla; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sea cucumbers; Bêche-de-mer; Trepang; Echinoderms; Fisheries; Aquaculture; Governance; Trade; Seafood; Tropical seascape; Zanzibar; Mayotte; Western Indian Ocean; marin ekotoxikologi; Marine Ecotoxicology;

   Sammanfattning : Collecting sea cucumbers to supply the high value Chinese dried seafood market is a livelihood activity available to many people in the Western Indian Ocean (WIO), making it an important part of local economies. These fisheries are generally not successfully managed and tropical sea cucumber fisheries show continuing signs of decline. LÄS MER

3. 2. Middle ordovician conodonts from the Atlantic faunal region and the evolution of key conodont genera

   Författare :Jianhua Zhang; Anita Löfgren; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Conodonts; Middle Ordovician; Biostratigraphy and lithofacies; Evolution; Atlantic Faunal Region; Earth sciences; Geovetenskap; allmän och historisk geologi; General and Historical Geology;

   Sammanfattning : This thesis consists of seven separate articles that are mainly concerned with Middle Ordovician conodonts. The studied conodont specimens were obtained from three Middle Ordovician sections in south China and four Middle Ordovician sections in Sweden. LÄS MER

4. 3. Deposition, palaeoecology and diagenesis of the Silurian reef-like limestones on Gotland

   Författare :Akihiro Kano; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Several Silurian (Wenlockian-Ludlovian) reef-like limestones on Gotland wereselected for studies of depositional, palaeoecological, and diagenetic conditions. Thereef-like limestones were deposited on a warm, shallow and open marine shelf. LÄS MER

5. 4. Brittlestars Galactosaminoglycans and Tools to Study their Structure

   Författare :Ramesh Babu Namburi; Dorothe Spillmann; Lena Kjellén; Ulf Lindahl; Clare Hughes; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Chondroitin sulfate; Brittlestars; Gut bacteria; H. bizzozeronii; B.thetaiotaomicron; Biokemi; Biochemistry; Mikrobiologi; Microbiology; Molecular Biology; Molekylärbiologi;

   Sammanfattning : In all living organisms, biological activities such as proper functioning and co-ordination of different organs will depend on different cells and molecular interactions. In some organisms the loss of functional organs or damage of organs can be lethal, whereas in others a special process called regeneration can retrieve lost organs. LÄS MER

7. 5. Palaeobiology and taphonomy of early problematic fossils

   Författare :Mónika Marti Mus; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Geovetenskap; Earth sciences; Geovetenskap; Historical Geology and Paleontology; Historisk geologi och paleontologi;

   Sammanfattning : Extinct organisms that cannot be accommodated in any extant phylum are generally referred to as "problematic fossils". They are more numerous in progressively older strata and constitute an important part of the late Proterozoic and early Palaeozoic biota. LÄS MER