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Notes on the breeding habits of the nudibranchs of Monterey bay and vicinity
Author(s) -
Costello D. P.
Publication year - 1938
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1050630208
Subject(s) - biology , bay , zoology , seasonal breeder , period (music) , ecology , oceanography , geology , physics , acoustics
Data concerning the seasonal distribution of twenty‐two species of nudibranchs are recorded for a period of 9 months. The occurrence of copulation and of egg laying for these animals in the laboratory aquaria is recorded for the same period. These data indicate that the seasonal distribution of certain species is well marked, and that there is in many cases a definite breeding season. The characteristics of the egg ribbons of these nudibranchs are described, and figured by means of photographs. These egg ribbons approach the mathematical form of a spiral of Archimedes. In every case observed, the ribbon was deposited in a counter‐clockwise direction, viewed dorsally. The relationship between these observations and earlier work on the life histories of the nudibranchs is discussed.