Seasonal and depth variation in fecundity of Acropora palifera at two reefs in Papua New Guinea

Kojis, Barbara L.; Quinn, Norman J.

doi:10.1007/bf00301961

Cited by 107 publications

(73 citation statements)

References 18 publications

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“…Atrophy and resorption of oocytes have been reported for some coral species , Kojis & Quinn 1984. In this study of Oulastrea crispata, the number of oocytes present in each mesentery decreased between July and September.…”

Section: Gametogenesis and Planula Releasesupporting

confidence: 44%

“…Settlement failure by coral larvae during the spawning period in summer can also cause a lost link between sexual reproduction and observed recruitment. A lowering of larval viability may be brought about by sedimentation (Hodgson 1990, Rogers 1990, Te 1992, water turbidity (Kojis & Quinn 1984, Jokiel 1985, Tomascik & Sander 1987, nutrient enrichment (Tomascik 1991, Ward & Harrison 1997, water pollution , lower salinity (Richmond 1993a,b) or competition with fast-growing sessile invertebrates (Birkeland 1977(Birkeland , 1988 and macroalgae (Tanner 1995). Water quality at Hoi Ha Wan in summer is characterised by low dissolved oxygen levels, wide fluctuations in salinity and water transparency, all of which may, therefore, decrease the rate of coral settlement.…”

Section: Gametogenesis and Planula Releasementioning

confidence: 99%

See 1 more Smart Citation

Sexual reproduction of a low-temperature tolerant coral Oulastrea crispata (Scleractinia, Faviidae) in Hong Kong, China

Lam

2000

Mar. Ecol. Prog. Ser.

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In December 1993, an experimental artificial reef made of pulverised fuel ash (PFA) and concrete was deployed at Hoi Ha Wan Marine Park, Hong Kong. The reproductive biology of Oulastrea crispata, the pioneer species recruited onto the structure, was studied to ascertain its reproductive strategies, including its gametogenic cycle in terms of oocyte and spermary development and timing of planula release. A histological study showed that O. crispata was hermaphroditic and had an annual gametogenic cycle with an extended spawning period from July to October. Planulae were released in the resting period of the gametogenic cycle. With an opportunist life history trait, including a wide range of reproductive strategies, O. crispata is able to colonize a variety of substrata, including those unfavourable to other corals, and to flourish as the pioneer colonizer of newly immersed structures.

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Section: Gametogenesis and Planula Releasesupporting

confidence: 44%

Section: Gametogenesis and Planula Releasementioning

confidence: 99%

Sexual reproduction of a low-temperature tolerant coral Oulastrea crispata (Scleractinia, Faviidae) in Hong Kong, China

Lam

2000

Mar. Ecol. Prog. Ser.

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“…Some support for reduced fitness as a selective pressure for larval behaviour can be found in aspects of general coral reproductive biology. Fecundity of Acropora palüera appears to decrease with increasing depth (Kojis & Quinn 1984), and fecundity of A. formosa appears to increase with increasing depth (Harnson & Wailace 1990). Observations of relatively fewer reproductive colonies and lower fecundity of the gorgonians Mun'cea caiifornica and M. fruticosa at the lower limit of their depth range in California (Gngg 1979) provides further support for this hypothesis.…”

Section: Platygyra Daedaleamentioning

confidence: 99%

Are vertical distribution patterns of scleractinian corals maintained by pre- or post-settlement processes? A case study of three contrasting species

Mundy¹,

Babcock²

2000

Mar. Ecol. Prog. Ser.

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ABSTRACT. Vertical zonation of hard corals in tropical coral reef Systems is a weil documented and predictable pattern in the organisation of tropical coral communities. However, the mechanisms that underly vertical zonation of hard corals are poorly understood. Two alternative conceptual models for the maintenance of vertical zonation are considered; depth-dependent settlement of larvae, or indiscriminant settlement of larvae with distnbutions determined by differential post-settlement mortality with depth. These alternative models were evaluated by undertaking field translocation experiments using 10 d old juveniles of 3 species with contrasting adult distnbutions: Goniastrea aspera (Verrillrestncted to shallow reef flat habitats; Oxypora lacera (Verrili)-restncted to low light, lower slope habitats; and Platygyra daedalea (Ehs and Solander) -a species with a broad depth range. Laboratoryraised larvae of each species were settled onto terracotta settlement plates and the plates translocated to 3 depths in the field: reef flat (0 m), mid slope (5 m), lower slope (10 m). Survival of the laboratorysettled juveniles was monitored at 3, 6 and 12 mo after settlement. For each of the 3 species, juveniles survived equaliy well at all 3 depths over the 12 mo study penod. The pattern of survivorship of G. aspera and P. daedalea among depths, however, was dependent on plate surface (top, bottom). Given the absence of depth-dependent survival of juveniles from the 2 zone-specific species G. aspera and 0. lacera, we reject the hypothesis that adult distribution patterns of these 2 species is determined by indiscriminant settlement of larvae followed by differential early post-settlement mortality with depth.

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“…Sediment particles may smother and abrade the coral animal, and suspended matter reduces light incidence and photosynthesis in the coral's algal symbionts (Dodge and Vaisnys, 1977;Rogers, 1990). Sedimentation can lead to reduced skeletal growth rates (Dodge and Vaisnys, 1977), reduced fecundity (Kojis and Quinn, 1984), and changes in community structure (Rogers, 1990). Heavy metal pollution from runoff is also a concern for corals.…”

Section: Introductionmentioning

confidence: 99%

Century-scale records of land-based activities recorded in Mesoamerican coral cores

Carilli

Prouty

Hughen

et al. 2009

Marine Pollution Bulletin

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The Mesoamerican Reef, the second-largest barrier reef in the world, is located in the western Caribbean Sea off the coasts of Mexico, Belize, Guatemala, and Honduras. Particularly in the south, the surrounding watersheds are steep and the climate is extremely wet. With development and agricultural expansion, the potential for negative impacts to the reef from land-based runoff becomes high. We constructed annually resolved century-scale records of metal/calcium ratios in coral skeletons collected from four sites experiencing a gradient of land-based runoff. Our proxy data indicate that runoff onto the reef has increased relatively steadily over time at all sites, consistent with land use trends from historical records. Sediment supply to the reef is greater in the south, and these more exposed reefs will probably benefit most immediately from management that targets runoff reduction. However, because runoff at all sites is steadily increasing, even distal sites will benefit from watershed management.

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Seasonal and depth variation in fecundity of Acropora palifera at two reefs in Papua New Guinea

Cited by 107 publications

References 18 publications

Sexual reproduction of a low-temperature tolerant coral Oulastrea crispata (Scleractinia, Faviidae) in Hong Kong, China

Sexual reproduction of a low-temperature tolerant coral Oulastrea crispata (Scleractinia, Faviidae) in Hong Kong, China

Are vertical distribution patterns of scleractinian corals maintained by pre- or post-settlement processes? A case study of three contrasting species

Century-scale records of land-based activities recorded in Mesoamerican coral cores

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