Effect of water level fluctuation on shore spawning of Mirogrex terraesanctae (Steinitz), (Cyprinidae) in Lake Kinneret, Israel

S. Gafny, A. Gasith*, M. Goren

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Mirogrex terraesanctae (Steinitz), is an endemic, open water, zooplanktivorous fish. It spawns in the shallow littoral (0–50 cm) of Lake Kinneret, from November to May with a peak in mid winter (January‐February). Spawning begins shortly after nightfall, when schools of the fish move along the shoreline in rocky regions, and release their milt and eggs. The adhesive eggs are attached to the surface of recently inundated, algae‐free stones. A negative relationship exists between epilithic growth and egg density and survival. Algal growth may play a key role in the determination of the spawning depth. Breeding success of M. terraesanctae depends on the rate and extent of rise in lake level which, in turn, determines the availability of a suitable spawning substratum.

Original languageEnglish
Pages (from-to)863-871
Number of pages9
JournalJournal of Fish Biology
Volume41
Issue number6
DOIs
StatePublished - Dec 1992

Keywords

  • Lake Kinneret
  • Mirogrex
  • spawning
  • spawning substrate
  • water level

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