Sökning: "size at maturation"

Visar resultat 1 - 5 av 27 avhandlingar innehållade orden size at maturation.

1. 1. Variation in age and size at maturation in two benthic crustaceans in the Gulf of Bothnia

   Författare :Kjell Leonardsson; J. Ekman; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Age at maturation; alternative prey; Bergmanris rule; cannibalism; growth; life-history theory; mortality; Mvoxocephalus quadricornis; poikilotherm; Pontoporeia affinis; population dynamics; risk- taking behaviour; Saduria entomon; size at maturation; temperature;

   Sammanfattning : The thesis deals with variation in age and size at maturation in Saduria entomon and Pontoporeia affinis along a depth gradient in the Gulf of Bothnia, Sweden. I have analysed at what sizes and ages animals should mature in relation to growth and mortality conditions. LÄS MER

3. 2. Airway maturation in Drosophila

   Författare :Katarína Tiklová; Christos Samakovlis; Richard Fehon; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; utvecklingsbiologi; Developmental Biology;

   Sammanfattning : Tubes are a fundamental unit of organ design. Most of our major organs like the lung, kidney and vasculature are composed primarily of tubes. To identify fundamental biological principles of tubular organ formation we used the respiratory organ of Drosophila melanogaster, the trachea.This work dissects embryonic trachea maturation. LÄS MER

4. 3. Food Web Ecology -- individual life-histories and ecological processes shape complex communities

   Författare :Martin Hartvig; Evolutionär ekologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; food web; community ecology; community assembly; size-structure; life-history omnivory; ontogeny; trophic interactions; trait based model; topology; emergent organisation; size-spectrum;

   Sammanfattning : This thesis sets out a food web framework for size-structured populations. The framework enables an ecological approach to food web modelling as the individual life-history from birth, through maturation, and ultimately death is explicitly resolved with the use of bioenergetics based on individual body size. LÄS MER

5. 4. Toxic metals, essential micronutrients, gestational thyroid hormones, and size at birth

   Författare :Klara Gustin Mossegård; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : The toxicity of the metals cadmium (Cd), lead (Pb), and methylmercury [MeHg; an organic and very toxic form of mercury (Hg)] in adults have long been recognized. It is also well-established that early-life exposure to Pb and MeHg is associated with neurodevelopmental toxicity. LÄS MER

7. 5. Early-life gut microbiota and breast milk oligosaccharides in relation to childhood immune maturation and allergy

   Författare :Ylva Margareta Sjögren; Eva Sverremark-Ekström; Outi Vaarala; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; allergy; infant; gut microbiota; human milk oligosaccharides; Bifidobacterium; Lactobacillus; Bacteroides fragilis; Clostridium difficile; family size; secretory IgA; toll like receptor; Immunology; Immunologi; immunologi; Immunology;

   Sammanfattning : Atopic allergy is the most common chronic disease among children in the developed world. This high prevalence could be associated with low microbial exposure. The early gut microbiota appears to be important for immune maturation. LÄS MER