Essays about: "allopatric"

Found 5 essays containing the word allopatric.

  1. 1. Integrative Approaches Illuminate Evolutionary Divergence in the Bar-tailed Lark Complex ( Ammomanes cinctura)

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Zongzhuang Liu; [2023]
    Keywords : Alaudidae; Ammomanes cinctura; Integrative taxonomy; Genomics; Plumage; Evolutionary divergence;

    Abstract : Ammomanes cinctura (Bar-tailed Lark) is a lark species with a wide distribution in the Palearctic. One of its subspecies, A. c. READ MORE

  3. 2. Habitat availability and ontogenetic niche shifts : The effects on adult size of lake-living brown trout (Salmo trutta)

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Elin Lindmark; [2021]
    Keywords : ontogenetic niche shift; habitat availability; size structure; brown trout;

    Abstract : One common consequence of ontogenetic niche shifts is that juveniles and adults of the same species often use different resources and habitats. Theory suggests that variation in productivity and/or habitat size for the respective life stage regulates size distribution of individuals and population biomass. READ MORE

  4. 3. The Basis of Reproductive Isolation Between Ecologically Divergent Host Plant Races

    University essay from Lunds universitet/Examensarbeten i biologi

    Author : Emma Kärrnäs; [2018]
    Keywords : Biology and Life Sciences;

    Abstract : Insects and their host plants constitute a considerable proportion of the diversity on earth, and host shifts hence provide excellent study systems to study the process that drive diversification. In this study, I address what the mechanism to achieve assortative mating is in two host races using different host plants to increase our understanding of how reproductive isolation can arise in the face of ecological specialization. READ MORE

  5. 4. Variation in number of vertebrae in populations of pike (Esox lucius) in the south-east of Sweden

    University essay from Linnéuniversitetet/Institutionen för biologi och miljö (BOM)

    Author : David Alvunger; [2016]
    Keywords : Ecology; Esox lucius; evolution; meristic characters; pleomerism; selection;

    Abstract : Antalet ryggkotor varierar kraftigt mellan olika taxa, men också inom arter eller populationer. Omfattande forskning har visat att antalet ryggkotor hos fisk är resultatet av interaktioner mellan genetisk struktur och plastiska svar på miljöbetingelser under individens ontogeni. READ MORE

  6. 5. Life history and large-scale habitat use of brown trout (Salmo trutta) and brook trout (Salvelinus fontinalis) : implications for distributional patterns in small lotic systems

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Gunnar Öhlund; [2002]
    Keywords : brown trout; brook trout; interspecific competition; life history; fitness; allopatric; sympatric; salmonid;

    Abstract : Over the years, several salmonid species have been widely spread and successfully introduced all over the world. In Sweden, introduced brook trout (Salvelinus fontinalis) has been successful in establishing a substantial number of new populations, a fact that has raised concerns about indigenous brown trout (Salmo trutta) populations being outcompeted. READ MORE