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ARS Home » Southeast Area » Stuttgart, Arkansas » Harry K. Dupree Stuttgart National Aquaculture Research Cntr » Research » Publications at this Location » Publication #96400
Title: ZOOPLANKTON MANAGEMENT AND RECIPROCAL HYBRID STRIPED BASS FINGERLING PRODUCTION.

Author
item LOCHMANN, STEVE - UNIV. ARKANSAS PINE BLUFF
item Ludwig, Gerald
item JACKSON, MAURICE - UNIV. ARKANSAS PINE BLUFF

Submitted to: Journal of the World Aquaculture Society
Publication Type: Abstract Only
Publication Acceptance Date: 2/2/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Techniques for producing hybrid striped bass out of season have been developed and techniques for raising fingerlings intensively are being examined. However, the requirement for live zooplankton by fry may impede the development of year-round production ss culture of freshwater rotifers from algal cultures is not well developed. We explored using pond produced rotifers and other zooplankton during seasons not normally associated with zooplankton production. For fall production of reciprocal hybrid fry we monitored zooplankton abundances, secchi disk depth, temperature and dissolved oxygen daily between 18 October and 25 November in three 0.1 acre ponds in Arkansas. Temperatures ranged from 4 to 31 C and dissolved oxygen from 4 to 15 ppm. Rotifer abundance peaked at a level suitable for fry production, approximately 8600 per liter, on day 18 of the study and the rotifer bloom was followed by cladoceran and copepod blooms. For maximizing zooplankton production we conducted a study with graded levels of fertilizer in fifteen 0.1 acre ponds at the Stuttgart National Aquaculture Research Center. Fertilizer levels ranged from 1 to 4 times the typical rates for fingerling production. We monitored dissolved oxygen, primary productivity, nitrate, nitrite, ammonia, phosphorus, chlorophyll, and zooplankton abundances daily from 19 May to 26 June. The timing and magnitude of the peaks in zooplankton abundances are compared to the fertilization levels.