dc.contributor.author	Tompkins, Keith Brian	en
dc.contributor.committeechair	Libey, George S.	en
dc.contributor.committeemember	Smith, Stephen A.	en
dc.contributor.committeemember	Coale, Charles W. Jr.	en
dc.contributor.department	Fisheries and Wildlife Sciences	en
dc.date.accessioned	2014-03-14T21:33:54Z	en
dc.date.adate	1999-04-27	en
dc.date.available	2014-03-14T21:33:54Z	en
dc.date.issued	1999-04-08	en
dc.date.rdate	2000-04-27	en
dc.date.sdate	1999-04-16	en
dc.description.abstract	This thesis was conducted to evaluate the potential of obtaining yellow perch eggs and fry by controlling the reproductive cycle of broodfish and the techniques used to rear the resulting fry. Chapter 1 is a review of literature pertaining to yellow perch culture and related topics. Chapter 2 is a study of yellow perch broodstock exposed to a 6-month, artificial photothermal cycle and injected with LHRHa and pimozide to induce spawning. The mean gonadosomatic index for manipulated females was 24.2% and the mean fertility of eggs from manipulated females was 26.5%. The fertilization rate was significantly greater among strip-spawned females than tank spawned females (p < 0.05). The time to ovulation after injection showed a negative correlation (r2 = 0.505) with the mean oocyte diameter of manipulated females. Chapter 3 is a study comparing the performance of larval yellow perch reared in a recirculating system fed only live rotifers (T1), in a recirculating system fed live rotifers and an artificial diet (T2) and in a greenwater system (T3). Survival was low in all treatments. The specific growth rate did not differ among treatments over the first 6 days. The percentage of fry with inflated swimbladders and absorbed yolksacs did not differ by day 6. While T3 larvae began ingesting food earlier than T1 and T2, the percentage of fry ingesting food did not differ among treatments by day 6 (p >0.1). The total percentage of skeletal deformities was greater in T3 than either T1 or T2 (p < 0.05) and may have been due to excessive handling of T3 larvae during hatch-out. Chapter 4 outlines the costs associated with a yellow perch hatchery designed around photothermally manipulated broodstock. This hatchery model produces four separate spawns annually, yielding 644,000 fingerlings year-1. Including start-up, fixed and variable costs, such a facility can produce 3" (76mm) fingerlings for $0.20 fingerling-1 for the first 5 years of operation, $0.16 fingerling-1 for the second 5 years and $0.06 fingerling-1 after 10 years.	en
dc.description.degree	Master of Science	en
dc.identifier.other	etd-041699-070710	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-041699-070710/	en
dc.identifier.uri	http://hdl.handle.net/10919/42112	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	tab4(1).pdf	en
dc.relation.haspart	vita.pdf	en
dc.relation.haspart	fig3(1).pdf	en
dc.relation.haspart	fig4(6).pdf	en
dc.relation.haspart	fig4(7).pdf	en
dc.relation.haspart	fig4(4).pdf	en
dc.relation.haspart	fig4(2).pdf	en
dc.relation.haspart	fig4(1).pdf	en
dc.relation.haspart	etd.pdf	en
dc.relation.haspart	front.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	yellow perch	en
dc.subject	Reproduction	en
dc.subject	larvae	en
dc.subject	commercial	en
dc.title	Reproductive Manipulation and Larval Rearing Techniques of Yellow Perch (Perca flavescens)	en
dc.type	Thesis	en
thesis.degree.discipline	Fisheries and Wildlife Sciences	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

Reproductive Manipulation and Larval Rearing Techniques of Yellow Perch (Perca flavescens)

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