Preliminary survey of egg envelope morphology in the Macrouridae and the possible implications of its ornamentation
作者:
N. R. Merrett,
S. H. Barnes,
期刊:
Journal of Fish Biology
(WILEY Available online 1996)
卷期:
Volume 48,
issue 1
页码: 101-119
ISSN:0022-1112
年代: 1996
DOI:10.1111/j.1095-8649.1996.tb01422.x
出版商: Blackwell Publishing Ltd
关键词: eggs;deep‐sea;macrourid fishes;egg envelope ornamentation;scanning electron microscopy;ecology
数据来源: WILEY
摘要:
The eggs of only 13 macrourid species have been reported hitherto, eight identified from free buoyant eggs and five from ripening oocytes. Eggs of 11 species had raised, hexagonally patterned ornamentation on the envelope, while two species bore only partial ornamentation. Ripening oocytes of a further eight species showed that, overall, the eggs of 13 species had characteristic hexagonal ornamentation and three partial ornamentation, but four were smooth. Fertilized eggs ofCoryphaenoides (Coryphaenoides) rupestriswere found with smooth envelopes, while ornamented eggs have been reported for this species also. Little taxonomic significance could be attached to these results. Some correlation was found between the three categories of egg envelope ornamentation and species' bathymetric distributions. A recent model of egg development in a slope dwelling trachichthyid species suggested analagous potential ecological advantage for ornamentational variation in macrourids.
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