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llEroRT on the I.westigatioiVs carried on during 1905 

 in connection with the Lancashire Sea-Fisheries 

 Laboratory at the University of Liverpool, and 

 the Sea-Fish Hatchery at Piel, near Barrow. 



Drawn up by Professor W. A. ITerdmax, F.R.S., Honorary 

 Director of the Scientific Work; assisted by Mr. 

 AxpREw Scott, A.L.S., Resident Fisheries Assistant 

 at Piel; and Mr. -Tames .Tohxstone, B.Sc, Fisheries 

 Assistant at the Liverpool Laboratory. 



(With plates, charts and figures in the text.) 



Contents. 



1. Introduction and General Account of the Work. (W. .A.H.) 1 



2. Sea-Fish Hatchino- at Piel. (A. S.) - . - - - 14 



3. Classes, Visitors, &c., at Piel. (A. S.) - - - - 17 



4. Report on the Tow-nettings. (A. S.) - - - - 20 



5. Paunistic Notes. (A. S.) - - - - - - - 47 



6. Mussel Transplantation. (Andrew Scott and Thomas Baxter) 58 



7. Trawling- Observations. (J. -J.) . . . - . 88 



8. Marked Fish Experiments. (-T. J.) - - - - - 108 



9. Parasites of Fishes. (.T.J.) 151 



10. Ichthyological Notes. (.J. J.) 186 



11. Sewage pollution at Llanfairfechan. (J. J.) - • - - 192 



12. Oligodynamic action of* Copper (W. A. H.) - - - 197 

 1.3. Sea-Fish Hatching at Port Erin. (W. A. H.) - - - 203 



INTRODFCTION AND GENERAL ACCOUNT 



OF THE WORK. 



This Record of 1905 naturally starts with three events 



of considerable importance in connection with scientific 



sea-fisheries work in the Irish vSea. These are: — 



1st. A renewal of the agreement between the Lanca- 

 shire and Western Sea-Fisheries Joint Committee and the 

 University of Liverpool confirming the appointment of 

 the Professor of Zoology as honorary head of the scientific 

 work, and giving an improved status and tenure to the 

 two scientific assistants. 



2nd. The completion and formal inauguration of the 

 new Laboratories of Zoology at the University, which 

 provide greatly increased accommodation and facilities 

 for both laboratory investigation and museum work on 

 the fisheries of the districi, 



