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oa South African Journal of Wildlife Research - 24-month delayed open access - Rearing of artificially spawned southern mullet

Volume 19, Issue 1
  • ISSN : 2410-7220
  • E-ISSN: 2410-8200

 

Abstract

The incubation of artificially fertilized southern mullet eggs and attempts at rearing the free embryos and larvae to 50 days are descriptionbed. Although fertilization and hatching success rates of up to 80% were achieved, subsequent mortalities of the delicate larvae were high. The supply of suitable live food organisms at the optimum densities for the larvae proved problematic. Two batches of larvae died within seven days of hatching while a third showed 0,2% (100 larvae) survival to 50 days. Two critical periods associated with high larval mortality were found on the 3rd-5th and 8th-12th days after hatching. The rotifer, Brachionus plicatilis, appeared suitable as first food for the larvae. Possible means of improving larval survival are outlined.

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/content/wild/19/1/AJA03794369_1563
1989-01-01
2020-07-15

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