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POPULATION STRUCTURE PATTERNS OF A COMMON RED SEA ECHINOID (TRIPNEUSTES GRATULA ELATENSIS)
in Israel Journal of Ecology and EvolutionSearch for other papers by J. DAFNI in
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Recruitment and size distribution patterns of Tripncustes gratilla elatensis were studied between 1979–1984 in the northern Gulf of Elat (= Gulf of 'Aqaba, Red Sea). Annual settlement of postlarval echinoids in the subtidal zone of a wave-exposed shore occurs at lute spring and the recruits grow rapidly, emerging from their understone shelters and moving offshore. In the first winter they attain adult size (>35mm) before being eliminated by destructive late-winter wave storms. The recruitment in a nearby wave-protected coral reef area is less predictable, and the subtidal juveniles retain a cryptic behaviour for >1 yr. These juveniles are apparently subject to predation by wrasses (Coris uygula, Labridae) when crossing the sandy lagoon to the reef. Consequently, the entire 35–50 mm size-group was absent from this site, the reef-Hat adults, on the other hand, exhibited stable size distribution patterns for several consecutive years, indicative of high survival. Following an unusual multi-recruitment event, in 1984, both sites became densely populated with postlarvae, and numerous growing urchins crossed the lagoon, recruiting the reef-flat subpopulation. These recruitment and life-history patterns generally agree with Ebert's (1982) model that emphasizes the role of recruitment variability and pre-reproductive survival on the determination of.longevity, demonstrating the role of predators and surf conditions in shaping the population structure of this echinoid.
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| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 187 | 53 | 14 |
| Gesamttextansichten | 14 | 1 | 0 |
| PDF-Downloads | 14 | 0 | 0 |
POPULATION STRUCTURE PATTERNS OF A COMMON RED SEA ECHINOID (TRIPNEUSTES GRATULA ELATENSIS)
in Israel Journal of Ecology and EvolutionSearch for other papers by J. DAFNI in
Current site
Google Scholar
PubMed
Search for other papers by R. TOBOL in
Current site
Google Scholar
PubMed
Recruitment and size distribution patterns of Tripncustes gratilla elatensis were studied between 1979–1984 in the northern Gulf of Elat (= Gulf of 'Aqaba, Red Sea). Annual settlement of postlarval echinoids in the subtidal zone of a wave-exposed shore occurs at lute spring and the recruits grow rapidly, emerging from their understone shelters and moving offshore. In the first winter they attain adult size (>35mm) before being eliminated by destructive late-winter wave storms. The recruitment in a nearby wave-protected coral reef area is less predictable, and the subtidal juveniles retain a cryptic behaviour for >1 yr. These juveniles are apparently subject to predation by wrasses (Coris uygula, Labridae) when crossing the sandy lagoon to the reef. Consequently, the entire 35–50 mm size-group was absent from this site, the reef-Hat adults, on the other hand, exhibited stable size distribution patterns for several consecutive years, indicative of high survival. Following an unusual multi-recruitment event, in 1984, both sites became densely populated with postlarvae, and numerous growing urchins crossed the lagoon, recruiting the reef-flat subpopulation. These recruitment and life-history patterns generally agree with Ebert's (1982) model that emphasizes the role of recruitment variability and pre-reproductive survival on the determination of.longevity, demonstrating the role of predators and surf conditions in shaping the population structure of this echinoid.
| Insgesamt | Letzte 365 Tage | In den letzten 30 Tagen | |
|---|---|---|---|
| Aufrufe von Kurzbeschreibungen | 187 | 53 | 14 |
| Gesamttextansichten | 14 | 1 | 0 |
| PDF-Downloads | 14 | 0 | 0 |
