Access the full text.
Sign up today, get DeepDyve free for 14 days.
R. Nzioka (1979)
Observations on the spawning seasons of East African reef fishesJournal of Fish Biology, 14
J. Lawrence, A. Lawrence, N. Holland (1965)
Annual Cycle in the Size of the Gut of the Purple Sea Urchin, Strongylocentrotus purpuratus (Stimpson)Nature, 205
D. Robertson, N. Polunin (1981)
Coexistence: Symbiotic sharing of feeding territories and algal food by some coral reef fishes from the Western Indian OceanMarine Biology, 62
T. McClanahan (1988)
Coexistence in a sea urchin guild and its implications to coral reef diversity and degradationOecologia, 77
H. Lessios, J. Pearse (1996)
Hybridization and introgression between Indo-Pacific species of DiademaMarine Biology, 126
N. Muthiga (1996)
The Role Of Early Life History Strategies On The Population Dynamics Of The Sea Urchin Echinometra Mathaei (de Blainville) On Reefs' In Kenya
H. Lessios (1981)
Reproductive periodicity of the echinoids Diadema and Echinometra on the two coasts of PanamaJournal of Experimental Marine Biology and Ecology, 50
R. Hori, V. Phang, T. Lam (1987)
On the pattern of gonadal development of the sea urchin, Diadema setosum off the coast of SingaporeZoological Science, 4
D. Levitan (1991)
Influence of Body Size and Population Density on Fertilization Success and Reproductive Output in a Free-Spawning Invertebrate.The Biological bulletin, 181 2
H. Lessios (1984)
POSSIBLE PREZYGOTIC REPRODUCTIVE ISOLATION IN SEA URCHINS SEPARATED BY THE ISTHMUS OF PANAMAEvolution, 38
P. Sale (1977)
Maintenance of High Diversity in Coral Reef Fish CommunitiesThe American Naturalist, 111
A. Giese, J. Pearse, V. Pearse (1991)
Echinoderms and Lophophorates
H. Lessios (1991)
Presence and absence of monthly reproductive rhythms among eight Caribbean echinoids off the coast of PanamaJournal of Experimental Marine Biology and Ecology, 153
Masao Yoshida (1952)
Some Observations on the Maturation of the Sea-urchin,Diadema setosum, 25
R. Ruwa, P. Polk (1994)
Patterns of spat settlement recorded for the tropical oyster crassostrea cucullata (born 1778) and the barnacle, balanus amphitrite (darwin 1854) in a mangrove creekTropical Zoology, 7
Mucki Shpigel, L. Fishelson (1986)
Behavior and physiology of coexistence in two species of Dascyllus (Pomacentridae, Teleostei)Environmental Biology of Fishes, 17
T. McClanahan, J. Kurtis (1991)
Population regulation of the rock-boring sea urchin Echinometra mathaei (de Blainville)Journal of Experimental Marine Biology and Ecology, 147
A. Hattori (1995)
Coexistence of two anemonefishes, Amphiprion clarkii and A. perideraion, which utilize the same host sea anemoneEnvironmental Biology of Fishes, 42
P. Herring (1972)
Observations on the distribution and feeding habits of some littoral echinoids from ZanzibarJournal of Natural History, 6
N. Kobayashi, Kenjid Nakamura (1967)
SPAWNING PERIODICITY OF SEA URCHINS AT SETO -II. DIADEMA SETOSUM-Publications of the Seto Marine Biological Laboratory, 15
C. Birkeland, S. Neudecker (1981)
Foraging Behavior of Two Caribbean Chaetodontids: Chaetodon capistratus and C. aculeatusCopeia, 1981
M. Ntiba, V. Jaccarini (1990)
Gonad maturation and spawning times of Siganus sutor off the Keny a coast: evidence for definite spawning seasons in atropical fishJournal of Fish Biology, 37
J. Connell (1978)
Diversity in tropical rain forests and coral reefs.Science, 199 4335
J. Pearse (1972)
A monthly reproductive rhythm in the diadematid sea urchin Centrostephanus coronatus VerillJournal of Experimental Marine Biology and Ecology, 8
(1974)
Chapter 1 – INTRODUCTION: GENERAL PRINCIPLES
B. Kennedy, J. Pearse (1975)
Lunar synchronization of the monthly reproductive rhythm in the sea urchin Centrostephanus coronatus VerrillJournal of Experimental Marine Biology and Ecology, 17
A. Drummond (1995)
Reproduction of the sea urchins Echinometra mathaei and Diadema savignyi on the South African eastern coastMarine and Freshwater Research, 46
J. Pearse (1968)
Patterns of reproductive periodicities in four species of indo-pacific echinodermsProceedings of the Indian Academy of Sciences - Section B, 67
P. Korringa (1947)
Relations between the Moon and Periodicity in the Breeding of Marine AnimalsEcological Monographs, 17
H. Fox (1932)
Lunar Periodicity in ReproductionNature, 130
T. Iliffe, J. Pearse (1982)
Annual and lunar reproductive rhythms of the sea urchin, Diadema antillarum (Philippi) in BermudaInternational journal of invertebrate reproduction, 5
T. McClanahan (1998)
Predation and the distribution and abundance of tropical sea urchin populationsJournal of Experimental Marine Biology and Ecology, 221
T. McClanahan (1988)
Seasonality in East Africa's coastal watersMarine Ecology Progress Series, 44
The sympatric echinoids Diadema savignyi and D. setosum coexist in shallow reef lagoons throughout East Africa. The reproductive strategies of these echinoids were studied to investigate reproductive isolation as a possible mechanism for maintaining the coexistence of these closely related species. The annual reproductive cycle and lunar periodicity were determined by gonad index measurements, histological examination of gametogenesis, and induction of spawning with injections of KCl. The peak reproductive period of D. savignyi coincided with the north-east monsoon period (when light and temperatures are high) as gonad indices were high (>8%) beginning in February and peaked at 9.7% in May. Gonad indices subsequently rapidly decreased (by 26%) in June at the beginning of the cooler south-east monsoon period. However, the presence of sperm and ova in most months of the year indicates continuous gametogenesis with reduced reproductive effort during the cooler months. The annual cycle for D. setosum showed less of a seasonal trend as gonad indices remained above 7% throughout much of the year but tended to be highest when temperatures were lower. This is the first confirmation of continuous reproduction in these two species at the equator. The reproductive patterns of both species remained consistent over 2 years of sampling. Both species exhibited a synchronized lunar spawning periodicity during the 3 months sampled, with D. setosum spawning on lunar days 8–10 and D. savignyi spawning after the full moon (lunar days 17–18). Whereas spawning in D. savignyi was very tightly synchronized, 20% of D. setosum individuals still spawned after the peak spawning period. The coexistence of these closely related species appears to be maintained by temporal reproductive isolation during the lunar spawning period reinforced by seasonal differences in reproductive effort.
Marine Biology – Springer Journals
Published: Jun 24, 2003
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.