EXPERT INVESTIGATION.

Auckland Star, Volume L, Issue 265, 7 November 1919, Page 6

EXPERT INVESTIGATION.

DETERIORATION OF TROUT. BY AUSTRALIAN SCIENTIST. " DR. TILLYARD COMES TO DOMINION At the invitation of the Government Dr. J. R. Tillyard, D.Sc., M.A., F.L.S., F.E.S., a well-known Australian scientist and entomologist, has come to New Zealand to investigate the causes of deterioration of trout at Rotorua and other popular fishing districts of this country. Besides this investigation the learned entomologist will also study insect life in this Dominion, paying particular attention to aquatic insects, amd in this department his work will tit in with the study of trout, for he is ! authorised to decide whether food supplies lias anything to do with the retrogression of the fish, which is considered to have been going on in Rotorua and elsewhere for a number of years. Dr. Tillyard is beginning his researches immediately, and went away to Rotorua to-day. He will probably put in a month in thiti and the Taupo district, and will go then to the South Island to continue his investigations. He is not likely to return to Auckland till the second month of next year, but while he is in the Dominion the doctor intends to lecture in the various centres of New Zealand, and has also agreed to lecture at the Otago Institute jubilee early next year.

So far as his qualifications are concerned, Dr. Tillyard, who will be accompanied I)}' Mr. D. Miller. Government entomologist, and Mr. D. Hamilton, zoologist of the Dominion Museum, is a Linnean Macleay Fellow in Zoology, this being a research position founded by Sir William Macleay, in the Sydney University. He lias written many works upon insect life, perhaps the most famous being the result of an exhaustive study of the biology of dragon-nies, this book creating wide scientific interest.