Sökning: "mating system"

Visar resultat 1 - 5 av 23 uppsatser innehållade orden mating system.

  1. 1. Body patterning and cognition in cephalopods - a literature review

    Master-uppsats, SLU/Dept. of Animal Environment and Health

    Författare :Georgina Chu; [2023]
    Nyckelord :cephalopods; octopus; body patterning; colour alteration; chromatophores; pigment cells; cognition; learning and memory;

    Sammanfattning : Cephalopods are a valuable model for studying the evolution of cognition due to their distinctive brain structure, organisation, and connectivity patterns compared to vertebrates. The development of large brains and behavioural complexities are believed to be triggered by evolutionary pressures stemming from factors like heightened predation, more demanding foraging conditions, and intense mating competition. LÄS MER

  3. 2. Sex-associated genomic variation in two ecotypes of Littorina saxatilis on the Swedish west coast

    Master-uppsats, Göteborgs universitet/Institutionen för marina vetenskaper

    Författare :Amin Ghane; [2022-09-26]
    Nyckelord :Littorina saxatilis; Sex chromosomes; Sex determination systems; Sex-associated genomic region;

    Sammanfattning : Sex, one of the most conspicuous characteristics of living organisms, has always been fascinating for biologists. The diversity of sex goes much beyond a simple distinction between males and females. Many organisms have more than two mating entities, and many species show some degree of hermaphroditism, at least in part of their life cycle. LÄS MER

  4. 3. How does a beef x dairy calving affect the dairy cow’s following lactation period?

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Roberto Espinola Alfonso; [2022]
    Nyckelord :beef cattle; dairy cattle; crossbreeding; milk yield; fertility; survival;

    Sammanfattning : In dairy x beef breeding, much of the research has focused on the performance of the crossbred calves, yet little focus has been given to the subsequent performance of the cow itself. This study aimed to evaluate the performance of dairy cows for milk yield, fertility, and survival traits after giving birth to crossbred calves, and to compare this to the performance of dairy cows after giving birth to purebred dairy calves. LÄS MER

  5. 4. Can Saccharomycopsis vini and Z4-11Al be used in a push-pull system against the invasive pest Drosophila suzukii?

    Kandidat-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

    Författare :Hedda Andersson; [2022]
    Nyckelord : Z -4-undecenal; pheromone; yeast; volatiles; pest management; spotted wing drosophila;

    Sammanfattning : Drosophila suzukii is a pest with global spread that lays its eggs in soft fruits. It has been deemed potentially invasive to Sweden. Contrary to other Drosophila species, D. suzukii possess a serrated ovipositor which makes it possible for it to lay its eggs in ripening fruits. LÄS MER

  7. 5. Automatisering av konstruktionsberäkningar för konceptuell design

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Avdelningen för Konstruktionsteknik

    Författare :Henning Stenbäck; Emelie Mattsson; [2019]
    Nyckelord :Conceptual design; parametric design; load bearing system; Technology and Engineering;

    Sammanfattning : Syftet med detta arbete är att undersöka möjligheterna kring att autor-matisera konstruktionsberäknngar i ett tidigt skede. Automatiseringensker med hjälp av det parametriska verktyget Grasshopper som är ettinsticksprogram till Rhino. I skriptet kan skjuväggar optiomeras stabi-lisera byggnaden med minsta möjliga materialmängd. LÄS MER