NDLI: Reproductive behavior of the halfmoon grouper, Epinephelus rivulatus, at Ningaloo Reef, Western Australia

Content Provider	Springer Nature Link
Author	Mackie, Michael
Copyright Year	2007
Abstract	Behaviors associated with spawning by the halfmoon grouper, Epinephelus rivulatus, at Ningaloo Reef, Western Australia, are described from in situ observations made each evening throughout most of a lunar cycle. Spawning occurred after sunset on six consecutive evenings during the full moon period. During this time males were particularly aggressive toward one another and maintained high levels of activity among the gravid females that rested within each of their territories. Spawning occurred when a male swam alongside a responsive female and the pair rose in a tight spiral 1–1.5 m into the water column before releasing gametes and returning to the seabed. Spawning activity was followed by a longer nonspawning period (ca. 20 days), when fewer intraspecific interactions were observed and gamete reserves were replenished. Histological and behavioral evidence suggests that this cycle of spawning and replenishment may occur on a monthly basis. Although individual fish, particularly females, moved into certain areas to spawn, E. rivulatus did not form spawning aggregations as do larger species of grouper.
Starting Page	213
Ending Page	220
Page Count	8
File Format	PDF
ISSN	13418998
Journal	Ichthyological Research
Volume Number	54
Issue Number	3
e-ISSN	16163915
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-08-25
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Serranidae Spawning Reproductive behavior Epinephelus rivulatus Ningaloo Reef Zoology Ecology Animal Systematics/Taxonomy/Biogeography Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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