Essays about: "Spawning habitats"

Showing result 1 - 5 of 22 essays containing the words Spawning habitats.

  1. 1. Evaluation of River Restoration Measures: Interstitial Habitat Variables and Salmon Hatching Rates as Indicators of Success

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning; Uppsala universitet/Limnologi

    Author : Jonas Emanuelsson; [2023]
    Keywords : ;

    Abstract : River ecosystems are some of the most complex ecosystems on Earth, characterized by a highly heterogenous environment which is able to sustain a disproportionally high level of biodiversity in relation to the area of which they occupy. However, anthropogenic activities are encroaching on the highly diverse riverine landscape, threatening freshwater biodiversity. READ MORE

  3. 2. Can spawning site temperature regimes cause spawning time divergence in sympatric whitefish ecotypes? : Comparison of two hypotheses

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

    Author : Joni Riihimaa; [2023]
    Keywords : Coregonus lavaretus; Hatching time; Spawning habitat; Spawning time; Temperature dependence;

    Abstract : The spawning time differs between sympatric ecotypes of lake-dwelling whitefish (Coregonus lavaretus) and this temporal divergence can be linked to the type of spawning habitat used (i.e., streams, littoral or profundal). READ MORE

  4. 3. A recipe for fish and SNPs : Filling the blanks for conservation genomics of Swedish wels catfish (Silurus glanis) populations

    University essay from Uppsala universitet/Institutionen för ekologi och genetik; Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Lars Littmann; [2022]
    Keywords : Catfish; Silurus glanis; Genomics; Genetics; Conservation; Mitochondrial; Whole-genome; NGS; Sweden;

    Abstract : Swedish populations of Wels catfish (Silurus glanis) experienced severe declines during the 19th and 20th centuries. The main causes for the decline were loss of suitable spawning habitat and fragmentation of populations. Currently, three native and two reintroduced populations remain in Sweden. READ MORE

  5. 4. Evaluating an increased spill regime as a management tool to improve downstream passage of salmon smolt

    University essay from Karlstads universitet/Institutionen för miljö- och livsvetenskaper (from 2013)

    Author : Mattias Hansson; [2022]
    Keywords : hydraulic modeling; hydroacoustic telemetry; time to event analysis; hydraulisk modellering; överlevnadsanalys; hydroakustisk telemetri;

    Abstract : The anadromous Atlantic salmon (Salmo salar) is dependent on river connectivity to reach spawning and rearing habitats in rivers. Most rivers are today fragmented by artificial barriers such as hydroelectric powerplants (HEP) which impede this migratory movement. READ MORE

  6. 5. Fatty acid composition in salmonid eggs : a comparative study of Atlantic salmon and brown trout

    University essay from SLU/Department of Molecular Sciences

    Author : Linnéa Appert; [2022]
    Keywords : Salmonid eggs; Lipids; Fatty acids; Atlantic salmon; brown trout; DHA; EPA; AA;

    Abstract : Atlantic salmon (AS) and brown trout (BT) are part of the salmonid family and are some of the most popular fish species in Western culture. Due to their popularity, there is incentive to understand the varying factors which ensures species survival. READ MORE