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Dr Magnus Johnson

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Magnus Johnson

Senior Lecturer in Environmental Marine Science


Diet as a mechanism of coexistence between intertidal fish species of the U.K. (2015)
Journal Article
Barrett, C. J., Johnson, M. L., & Hull, S. L. (2016). Diet as a mechanism of coexistence between intertidal fish species of the U.K. Hydrobiologia, 768(1), 125-135. doi:10.1007/s10750-015-2537-1

While the syntopic nature of many intertidal fish communities suggest that resources such as food are shared, little has been done to assess the importance of diet on the coexistence of intertidal fish of the U.K. In this study, six intertidal fish s... Read More about Diet as a mechanism of coexistence between intertidal fish species of the U.K..

External morphology of eyes and Nebenaugen of caridean decapods–ecological and systematic considerations (2015)
Journal Article
Johnson, M. L., Dobson, N., & De Grave, S. (2015). External morphology of eyes and Nebenaugen of caridean decapods–ecological and systematic considerations. PeerJ, 3(8), e1176. https://doi.org/10.7717/peerj.1176

Most caridean decapods have compound eyes of the reflecting superposition kind, and additionally some possess an accessory eye-like organ of unknown function, also referred to as the nebenauge.We examined 308 caridean genera to assess the general mor... Read More about External morphology of eyes and Nebenaugen of caridean decapods–ecological and systematic considerations.

Preliminary observations on the mandibles of palaemonoid shrimp (Crustacea: Decapoda: Caridea: Palaemonoidea) (2015)
Journal Article
Ashelby, C. W., De Grave, S., & Johnson, M. L. (2015). Preliminary observations on the mandibles of palaemonoid shrimp (Crustacea: Decapoda: Caridea: Palaemonoidea). PeerJ, 2015(3), e846. doi:10.7717/peerj.846

The mandibles of caridean shrimps have been widely studied in the taxonomy and functional biology of the group. Within the Palaemonoidea the mandibles reach a high level of structural diversity reflecting the diverse lifestyles within the superfamily... Read More about Preliminary observations on the mandibles of palaemonoid shrimp (Crustacea: Decapoda: Caridea: Palaemonoidea).

Evaluation of different concentration doses of eugenol on the behaviour of Nephrops norvegicus (2015)
Journal Article
Cowing, D., Powell, A., & Johnson, M. (2015). Evaluation of different concentration doses of eugenol on the behaviour of Nephrops norvegicus. Aquaculture, 442, 78-85. doi:10.1016/j.aquaculture.2015.02.039

Eugenol was tested for use as an anaesthetic on Nephrops norvegicus at three different concentrations (300, 600, 900 μL/L). Monitoring included the time taken to reach each sedation stage. Sedation stage was assessed by passive behaviours and reactio... Read More about Evaluation of different concentration doses of eugenol on the behaviour of Nephrops norvegicus.

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