NDLI: The reproductive biology of two deep-water, reef-building scleractinians from the NE Atlantic Ocean

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The reproductive biology of two deep-water, reef-building scleractinians from the NE Atlantic Ocean

Coral Reefs : Volume 24, Issue 2, June 2005

Coral Reefs : Volume 24, Issue 1, March 2005

Coral Reefs : Volume 23

Coral Reefs : Volume 22

Coral Reefs : Volume 21

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Coral Reefs : Volume 16

The reproductive biology of two deep-water, reef-building scleractinians from the NE Atlantic Ocean

Content Provider	Springer Nature Link
Author	Waller, Rhian G. Tyler, Paul A.
Copyright Year	2005
Abstract	The reproductive ecology of colonies of Lophelia pertusa (Linné 1758) and Madrepora oculata Linné (1758) from the Porcupine Seabight (Thérèse Mound and South Porcupine Seabight site) and the Darwin Mounds (NE Rockall Trough—L. pertusa only) was investigated using histological techniques. Samples of L. pertusa exhibited seasonal reproduction, whereas the evidence for M. oculata is equivocal but suggests multiple cohorts of gamete production. L. pertusa produces a single cohort of around 3,000 oocytes, whereas M. oculata produces two cohorts, with a total fecundity of around 60 oocytes. The maximum observed oocyte size in L. pertusa was 140 μm and in M. oculata was 405 μm. From these oocyte sizes and the timing of reproduction, a lecithotrophic larva is expected, though not observed. This seasonality of reproduction fits with the phytodetrital food fall occurring around July in the Seabight area. L. pertusa was found to be non-reproductive at the Darwin Mound site. Though unable to be specifically tested, this may suggest that the increased trawling activity in this area might be keeping colonies below sexually viable sizes, as seen in numerous shallow water situations. All areas in the NE Atlantic are coming under threat from increased fishing and commercial exploration practices. This study shows that these highly seasonal reproducers could be sensitive to these fishing operations and care must be taken so as not to repeat the destruction that has occurred on shallower reefs.
Starting Page	514
Ending Page	522
Page Count	9
File Format	PDF
ISSN	07224028
Journal	Coral Reefs
Volume Number	24
Issue Number	3
e-ISSN	14320975
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-08-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hermatypic Azooxanthellate Gametogenesis Lophelia pertusa Madrepora oculata Oceanography Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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