. Report for ... on the Lancashire Sea-Fisheries Laboratory at the University of Liverpool, and the Sea-Fish Hatchery at Piel. ust they have come to occupy a region of sea, justoutside the ten-fathom contour line and extending from aboutMorecambe Bay Light Vessel down to Liverpool LightVessel. There is an active plaice fishery all over this region,while outside it and up to the N. and there is also anactive fishery for soles. This offshore migration, then, is thefirst half of the total migratory movement of Lancashire shoreplaice. Next, there is a retrograde movement, and this revers
. Report for ... on the Lancashire Sea-Fisheries Laboratory at the University of Liverpool, and the Sea-Fish Hatchery at Piel. ust they have come to occupy a region of sea, justoutside the ten-fathom contour line and extending from aboutMorecambe Bay Light Vessel down to Liverpool LightVessel. There is an active plaice fishery all over this region,while outside it and up to the N. and there is also anactive fishery for soles. This offshore migration, then, is thefirst half of the total migratory movement of Lancashire shoreplaice. Next, there is a retrograde movement, and this reversaloccurs about the time when the temperature of the sea, havingattained its annual maximum, is now beginning to decreaseagain. The retrogression is indicated by the successive contourlines— September-October, November-December, and January-February. Each of these lines is a boundary. 123 showing the region into which the marked plaice have spread,from the region occupied during the previous two see, then, that there are three directions of migration:(1) The retrograde one back to the area of Kberation and the. Fig. 14. General synojitic chart showing the migrations of marked plaiceduring the months August-December. similar regions to North and South of the latter—this is veryevident in the months November and December, and it stillcontinues during the months January and February. Theplaice are seeking the shallow-water regions just off the 124 estuaries, and they are preparing to adopt a semi-hibernatehabit for the remainder of the winter months. { Winter inthe sea means the months January, February, and March.)(2) In addition to the retrograde movement there are, however,two others. Some plaice are migrating up to the towardsthe extensive, late winter, fishing area, between Ramsey Bay,in Isle of Man, and the entrance to the Solway Firth, whileothers are migrating to the towards the back-end plaice fishing region, just off the coasts of Anglesey andCarna
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectfisheries, bookyear18
