Effects of fishing with explosives (blastfishing) and sodium cyanide and of anchor damage on live coral were investigated on a heavily exploited fringing reef in Boli-nao, Philippines from 1987 to 1990. A simple balance-sheet model indicated that approximately 1.4%/yr of the hermatypic coral cover may have been lost to blasting, 0.4%/yr to cyanide, and 0.03%/yr to coral-grabbing anchors, the potential coral recovery rate reduced by about one third from 3.8%/yr in the absence of disturbances to 2.4%/yr.
Length-weight relationships were computed for 42 species of coral reef fishes from 14 families from the Alacran Reef (Yucatan, Mexico). A total of 1 892 individuals was used for this purpose. The fish species were caught by different fishing techniques such as fishhooks, harpoons, gill and trawl nets. The sampling period was from March 1998 to January 2000.
FishBase is a biological database with key information on more than 15,000 finfishes, including most coral reef species. In addition to current nomenclature, FishBase contains information on, e.g., maximum size and age, growth, length-weight relationship, reproduction, diet, predators, occurrence, preferred habitats and depth ranges. Most reef fishes are represented by color photos, and a Quick Identification routine based on dorsal and anal fin ray counts helps with identification.
The ability of coral reef ecosystems to exist in balanced harmony with other naturally occurring competing/limiting physicochemical and biological agents has been severely challenged in the last several decades by the dramatically increased negative and synergistic impacts from poorly managed anthropogenic activities. Globally, scientists are now working together and with other groups to promote assessment, monitoring, other research, protection, and restoration of coral reefs.
The principal objective of this conference was to mobilize action in support of coral reef conservation and management. The best available information on the status of coral reefs worldwide tells us that reefs are in decline or threatened over a large part of their distribution. The conference revolves around three major themes dealing with destructive use of coral reef resources. These include reef-destructive fishing, such as blast fishing, muro ami, cyanide and other poison fishing used in the live aquarium and food fish trades.
Local communities and local government units are recognized as the primary stakeholders and participants in the management of coral reef resources and the primary beneficiaries of small-scale fishing activities in the nearshore areas of the coastal zone. The issues relating to the management of the coastal zone are multi-faceted and some issues are largely intertwined with national policy and development goals. Thus, national governments have jurisdiction over these nearshore coastal resources to harmonize policies, monitor resource use and provide incentives for sustainable use.
The article highlights the ICLARM's Coastal and Coral Reef Systems Program featuring its objectives, researchthrusts and proposed research activities.
Coral reefs, the storehouses of much of the world’s marine biodiversity, and the source of many socioeconomic benefits, are in decline worldwide. The causes of the ‘coral reef crisis’ are complex but there is general agreement that two broad categories of stress are involved: global-scale climatic changes induced by production of greenhouse gases, and local-scale impacts.
Coral reef fisheries support tens of millions of people, mostly in developing countries. Fishing on reefs can be classified into three stages: manageable, ecosystem-overfished, and Malthusian-overfished. Fishing with blasting devices and poisons is often associated with the third stage. Reductions in herbivory caused by overfishing may enhance the likelihood of organic pollution causing a coral–algal phase shift following major disturbances. However, cage studies indicate that reduction in herbivory can lead to the proliferation of algae even in the absence of eutrophication.