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Pectinia lactuca

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CNIDARIA ANTHOZOA SCLERACTINIA PECTINIIDAE

Scientific Name: Pectinia lactuca
Species Authority: (Pallas 1766)
Common Name(s):
English Lettuce Coral

Assessment Information [top]

Red List Category & Criteria: Vulnerable A4cd ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Sheppard, A., Fenner, D., Edwards, A., Abrar, M. & Ochavillo, D.
Reviewer(s): Livingstone, S., Polidoro, B. & Smith, J. (Global Marine Species Assessment)
Justification:
This species is widespread and common throughout its range. However, it is particularly susceptible to bleaching, disease, harvesting for aquarium trade and extensive reduction of coral reef habitat due to a combination of threats. Specific population trends are unknown but population reduction can be inferred from declines in habitat quality based on the combined estimates of both destroyed reefs and reefs at the critical stage of degradation within its range (Wilkinson 2004). Its threat susceptibility increases the likelihood of being lost within one generation in the future from reefs at a critical stage. Therefore, the estimated habitat degradation and loss of 38% over three generation lengths (30 years) is the best inference of population reduction and meets the threshold for Vulnerable under Criterion A4cd. It will be important to reassess this species in 10 years time because of predicted threats from climate change and ocean acidification.

Geographic Range [top]

Range Description: In the Indo-West Pacific, this species is found in the southwest and central Indian Ocean, the central Indo-Pacific, west, north and east Australia, South-east Asia, Japan and the South China Sea, and the oceanic West Pacific.
Countries:
Native:
Australia; British Indian Ocean Territory; Cambodia; Comoros; Fiji; India; Indonesia; Japan; Kenya; Kiribati; Madagascar; Malaysia; Maldives; Marshall Islands; Mauritius; Mayotte; Micronesia, Federated States of ; Mozambique; Myanmar; Nauru; New Caledonia; Palau; Papua New Guinea; Philippines; Réunion; Seychelles; Singapore; Solomon Islands; Somalia; Sri Lanka; Taiwan, Province of China; Tanzania, United Republic of; Thailand; Tuvalu; Vanuatu; Viet Nam; Wallis and Futuna
FAO Marine Fishing Areas:
Native:
Indian Ocean – eastern; Indian Ocean – western; Pacific – northwest; Pacific – western central
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This is a common species.

There is no species specific population information available for this species. However, there is evidence that overall coral reef habitat has declined, and this is used as a proxy for population decline for this species. This species is particularly susceptible to bleaching, disease, and other threats and therefore population decline is based on both the percentage of destroyed reefs and critical reefs that are likely to be destroyed within 20 years (Wilkinson 2004). We assume that most, if not all, mature individuals will be removed from a destroyed reef and that on average, the number of individuals on reefs are equal across its range and proportional to the percentage destroyed reefs. Reef losses throughout the species' range have been estimated over three generations, two in the past and one projected into the future.

The age of first maturity of most reef building corals is typically three to eight years (Wallace 1999) and therefore we assume that average age of mature individuals is greater than eight years. Furthermore, based on average sizes and growth rates, we assume that average generation length is 10 years, unless otherwise stated. Total longevity is not known, but likely to be more than ten years. Therefore any population decline rates for the Red List assessment are measured over at least 30 years. Follow the link below for further details on population decline and generation length estimates.
For further information about this species, see Corals_SupportingDoc.pdf.
A PDF viewer such as Adobe Reader is required.
Population Trend: Unknown

Habitat and Ecology [top]

Habitat and Ecology: It is found in most reef environments, especially lower reef slopes and turbid water habitats. P. lactuca is commonly found from 12-15 m, rarely from 9-11 m, in the South China Sea and Gulf of Siam (Titlyanov and Titlyanova 2002). In the Philippines, this species has been seen at 5 m (Sheppard pers. comm.). Pectinia colonies occasionally reach 1 m or more in diameter (Wood 1983). P. lactuca colonies grow to around a metre. This species is found from 3-15 m.

Pectinia occurs in most reef habitats, both in shallow and deep areas (Wood 1983). This genus is typically conspicuous (Veron 1995). P. lactuca is conspicuous.
Systems: Marine

Threats [top]

Major Threat(s): In the Great Barrier Reef, Pectinia showed high susceptibility to bleaching (Baird and Marshall 2000). There is no information on bleaching response in the WIO. P. lactuca exhibited high bleaching and mortality in the 1998 bleaching event in Palau (Brunno et al. 2001).

In Lampung, Southern Sumatra Pectinia is in the top 25 genera collected for the aquarium trade (Terangi Indonesian Coral Reef Foundation, unpublished data).

This species is targeted for the aquarium trade. Indonesia is the largest exporter with an annual quota of 2,350 live pieces in 2005. The total number of corals (live and raw) exported for this species in 2005 was 2,889.

In general, the major threat to corals is global climate change, in particular, temperature extremes leading to bleaching and increased susceptibility to disease, increased severity of ENSO events and storms, and ocean acidification.

Coral disease has emerged as a serious threat to coral reefs worldwide and a major cause of reef deterioration (Weil et al. 2006). The numbers of diseases and coral species affected, as well as the distribution of diseases have all increased dramatically within the last decade (Porter et al. 2001, Green and Bruckner 2000, Sutherland et al. 2004, Weil 2004). Coral disease epizootics have resulted in significant losses of coral cover and were implicated in the dramatic decline of acroporids in the Florida Keys (Aronson and Precht 2001, Porter et al. 2001, Patterson et al. 2002). In the Indo-Pacific, disease is also on the rise with disease outbreaks recently reported from the Great Barrier Reef (Willis et al. 2004), Marshall Islands (Jacobson 2006) and the northwestern Hawaiian Islands (Aeby 2006). Increased coral disease levels on the GBR were correlated with increased ocean temperatures (Willis et al. 2007) supporting the prediction that disease levels will be increasing with higher sea surface temperatures. Escalating anthropogenic stressors combined with the threats associated with global climate change of increases in coral disease, frequency and duration of coral bleaching and ocean acidification place coral reefs in the Indo-Pacific at high risk of collapse.

Localized threats to corals include fisheries, human development (industry, settlement, tourism, and transportation), changes in native species dynamics (competitors, predators, pathogens and parasites), invasive species (competitors, predators, pathogens and parasites), dynamite fishing, chemical fishing, pollution from agriculture and industry, domestic pollution, sedimentation, and human recreation and tourism activities.

The severity of these combined threats to the global population of each individual species is not known.

Conservation Actions [top]

Conservation Actions: All corals are listed on CITES Appendix II. Parts of the species’ range fall within Marine Protected Areas.

Recommended measures for conserving this species include research in taxonomy, population, abundance and trends, ecology and habitat status, threats and resilience to threats, restoration action; identification, establishment and management of new protected areas; expansion of protected areas; recovery management; and disease, pathogen and parasite management. Artificial propagation and techniques such as cryo-preservation of gametes may become important for conserving coral biodiversity.

Having timely access to national-level trade data for CITES analysis reports would be valuable for monitoring trends this species. The species is targeted by collectors for the aquarium trade and fisheries management is required for the species, e.g., MPAs, quotas, size limits, etc. Consideration of the suitability of species for aquaria should also be included as part of fisheries management, and population surveys should be carried out to monitor the effects of harvesting. Recommended conservation measures include population surveys to monitor the effects of collecting for the aquarium trade, especially in Indonesia.

Citation: Sheppard, A., Fenner, D., Edwards, A., Abrar, M. & Ochavillo, D. 2008. Pectinia lactuca. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 28 November 2014.
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