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<br />5. Determine the best methods for physico-chemical <br />manipulation of the marsh. ~/ <br />6. Make management determinations from literature <br />review and from consultations. <br />6. Refine management criteria where necessary by <br />field experiments. <br />2. Measure the annual increment of the fishery attributable to <br />marsh production. <br />3. Estimate yearly totals of fish harvested and fishing effort <br />for three years prior to marsh operation on each of the <br />experimental and control lakes. <br />4. Design census for each lake to yield statistically valid <br />results. <br />3. Estimate yearly totals for fish harvested, marsh-reared <br />northern pike harvested, and fishing effort after marsh <br />operation on each experimental lake and total harvest and <br />effort on each control lake for the duration of the study. <br />4. Design census for each lake to yield statistically valid <br />results. <br />4. Fin clip all artificial marsh-reared northern pike. <br /> <br />~/ 1. <br />2. <br /> <br />3. <br />4. <br /> <br />Should water be left in the marsh year around? <br />Should the marsh be left drained after <br />fingerling removal? <br />a. If drained, when should it be flooded for <br />spawning or rearing use? <br />b. Should the dry marsh bottom be fallowed? <br />c. Should the dry marsh bottom be plowed, <br />disked and seeded? <br />Should marshes be fertilized? <br />What type vegetation is most desirable? <br />a. If marsh is left flooded, should vegetation <br />control be instituted? <br />b. If marshes are drained, what type <br />vegetation will provide the best <br />spawning substrate? <br />Considering potential for problems from NH3' <br />C02, H2S, CH2, and low 02, how should <br />fresh water supply and organic budget be <br />manipulated? <br /> <br />s. <br /> <br />19 <br /> <br />GP 0 868.725 <br />