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Effect of water level fluctuation on shore spawning of Mirogrex terraesanctae (Steinitz), (Cyprinidae) in Lake Kinneret, Israel
Author(s) -
Gafny S.,
Gasith A.,
Goren M.
Publication year - 1992
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1992.tb02715.x
Subject(s) - littoral zone , biology , milt , shore , cyprinidae , fishery , water level , fish <actinopterygii> , ecology , geography , cartography
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.