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Influences of Ca and Mg ions on the egg survival of grey mullet, Mugil cephalus L.
Author(s) -
Lee C.S.,
Hu F.
Publication year - 1983
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.1095-8649.1983.tb04721.x
Subject(s) - mugil , biology , magnesium , calcium , mullet , fishery , seawater , zoology , salinity , fish <actinopterygii> , chemistry , ecology , organic chemistry
Five kinds of artificial sea water with similar salinity, pH and osmolarity were prepared with different concentrations of calcium and magnesium ions. They were complete sea water, calcium‐free sea water, half calcium‐free sea water, magnesium‐free sea water and half magnesium‐free sea water. The fertilized eggs from induced spawnings of grey mullet Mugil cephalus , were transferred to these sea waters at two development stages, i.e. before the formation of 2‐blastomere stage and at the gastrula stage. Survivals of fertilized egg in different sea waters were checked after several hours incubation, the percentage survival was used as an index of the importance of calcium and magnesium to the embryonic development. The results showed that calcium is indispensable to the embryonic development of mullet egg. Magnesium, however, is not the necessary element in the incubation medium.