Andreas Borchel- PhD
- Researcher at University of Bergen
Andreas Borchel
- PhD
- Researcher at University of Bergen
About
27
Publications
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Introduction
Andreas Borchel currently works at the Department of Biology, University of Bergen. Andreas does research in Genetics and Molecular Biology.
Current institution
Publications
Publications (27)
Caligus elongatus is a marine copepod ectoparasite on a wide variety of fish species. It has also been observed on fish farms cultivating Atlantic salmon and reports shows that this parasite can be a problem for the industry and for the fish’s welfare. Freshwater is used as one of the non-medical treatment methods against the salmon louse (Lepeopht...
Salmon louse (Lepeophtheirus salmonis) is a skin- and blood-feeding ectoparasite, infesting salmonids. While feeding, labial gland proteins from the salmon louse may be deposited on the Atlantic salmon (Salmo salar) skin. Previously characterized labial gland proteins are involved in anti-coagulation and may contribute to inhibiting Atlantic salmon...
The salmon louse is an economically important parasite on Atlantic salmon and poses a major threat to aquaculture. Several treatment methods have lost their effect due to resistance development in the lice. A rather new method for combatting sea lice is freshwater treatment where the various life stages of lice are differently affected by this trea...
Atlantic salmon (Salmo salar) are highly susceptible to infestations with the ectoparasite Lepeophtheirus salmonis, the salmon louse. Infestations elicit an immune response in the fish, but the response does not lead to parasite clearance, nor does it protect against subsequent infestations. It is, however, not known why the immune response is not...
Lepeophtheirus salmonis and Caligus elongatus are two parasitic copepod species posing a significant threat to salmonid aquaculture. Consequently, several gene expression studies are executed each year to gain new knowledge and treatment strategies. Though, to enable accurate gene expression measurements by quantitative real time PCR, stable refere...
Salmon lice are ectoparasites on salmonids and feed on blood, mucus, and skin from their hosts. This causes high annual costs for treatment and control for the aquaculture industry. Salmon lice have a life cycle consisting of eight life stages. Sex determination by eye is only possible from the sixth stage onwards. A molecular sex determination has...
Salmon lice (Lepeophtheirus salmonis) are marine parasitic copepods living on salmonids and are challenging for salmon aquaculture. One of several treatment methods is the application of freshwater to the fish which can lead to lice loss. However, lab experiments have shown that salmon lice, acclimated to seawater, are capable of surviving for seve...
The objective of the present study is to identify and evaluate informative indicators for the welfare of rainbow trout exposed to (A) a water temperature of 27 °C and (B) a stocking density of 100 kg/m3 combined with a temperature of 27 °C. The spleen-somatic and condition index, haematocrit and the concentrations of haemoglobin, plasma cortisol an...
The salmon louse Lepeophtheirus salmonis is a parasite of Atlantic salmon and other salmonids. Every year, it causes high costs for the Norwegian aquaculture industry. While the morphology of the female genital tract has been described, knowledge of the molecular basis of reproduction is very limited. We identified nine genes which are expressed ex...
Apoptosis is an integral part of homeostasis and supports multiple physiological processes such as development and immune defense, thereby directly targeting damaged or unwanted cells without affecting neighbor cells. In the present study, we characterized the apoptotic key factors caspase-3, −7, and − 8 as well as regulator protein TPT1 (translati...
The creatine/phosphocreatine system is the principal energy buffer in mammals, but is scarcely documented in fish. We measured the gene expression of major enzymes of this system, glycine amidinotransferase (GATM), guanidinoacetate N-methyltransferase (GAMT) and muscle-type creatine kinase (CKM) in kidney, liver, and muscle tissues of fish and mamm...
The salmon louse (Lepeophtheirus salmonis) is an important parasite of Atlantic salmon (Salmo salar). It is widely spread in aquaculture facilities and leads to economic losses every year. As it has developed resistances against many common treatments, new control methods must be established. Here we characterize a novel gene family of the salmon l...
A rapid decline in temperature poses a major challenge for poikilothermic fish, as their entire metabolism depends on ambient temperature. The gene expression of rainbow trout Oncorhynchus mykiss having undergone such a cold shock (\(0{^{\circ }}\hbox {C}\)) was compared to a control (\(5{^{\circ }}\hbox {C}\)) in a microarray and quantitative real...
Salmon lice (Lepeophtheirus salmonis) are parasitic copepods, living mainly on Atlantic salmon and leading to large economical losses in aquaculture every year. Due to the emergence of resistances to several drugs, alternative treatments are developed, including treatment with hydrogen peroxide, freshwater or thermal treatment. The present study gi...
Maraena whitefish (Coregonus maraena, Bloch, 1779) is a high-quality food fish belonging to the family Salmonidae with considerable economic relevance in the Baltic area. Aquaculture of this species is fundamental for its successful conservation and thus sustainable fisheries. Robust fishes obtained from breeding lines build the basis for effective...
Seasonal water temperatures can be stressful for fish in aquaculture and can therefore negatively influence their welfare. Although the kidney is the crucial organ associated with the primary stress response, knowledge about the stress-modulated kidney transcriptome in salmonids is limited. In the present study, we used a comparative microarray app...
Interleukin-6 (IL6) is a pleiotropic cytokine with important immunoregulatory functions. Its expression is inducible in immune cells and tissues of several fish species. We also found that IL6 mRNA abundance was significantly increased in spleen, liver, and gill of rainbow trout after experimental infection with Aeromonas salmonicida. Genomic DNA s...
Creatine plays an important role in the cell as an energy buffer. As the energy system is a basic element of the organism it may possibly contribute to differences between rainbow trout strains selected for the traits growth and robustness, respectively. The cDNA sequences of creatine-related genes encoding glycine amidinotransferase (GATM), guanid...
Robustness is a sparsely observed trait in rainbow trout aquaculture; however, the different stress adaptation potential of fish and its commercial relevance is undervalued. Compared with other economical traits, such as growth or body weight, characterization of robustness and specific statements about the trait are very complex. Therefore, trait...
