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The use of additional lighting and artificial photoperiods to recondition early maturing Atlantic salmon (Salmo salar) in Tasmania

journal contribution
posted on 2023-05-16, 16:48 authored by Porter, MJR, Woolcott, H, Pankhurst, NW
Salmonid culture in Tasmania experiences high rates of early maturation due to the rapid growth rates achieved under favorable environmental conditions. The present study investigates the use of artificial photoperiod to recondition previously mature Atlantic salmon to provide a larger fish with higher market value. Individual groups of previously mature female Atlantic salmon (Salmo salar) were put under 24 hour artificial light from either May, June, July or maintained under ambient conditions during the austral winter. Fish maintained under lights attained a reversion from dark skin pigmentation, typical of mature individuals, to a silver sea-going coloration more rapidly than the control group. In addition flesh pigmentation, ovarian absorption and body wall thickness was significantly greater than that of the control fish resulting in a higher market price. The study demonstrates that artificial lights can facilitate the reconditioning of previously mature Atlantic salmon under southern hemisphere conditions. © 2004 Kluwer Academic Publishers.

History

Publication title

Fish Physionlogy and Biochemistry

Volume

28

Issue

1-4

Pagination

391-393

ISSN

0920-1742

Department/School

Institute for Marine and Antarctic Studies

Publisher

Springer-Verlag Dordrecht

Place of publication

Netherlands

Repository Status

  • Restricted

Socio-economic Objectives

Fisheries - aquaculture not elsewhere classified

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