Toward a generic trawl survey database management system.

This Workshop, made possible by a grant from the Asian Development Bank (ADB) to the International Center for Living Aquatic Resources Management (ICLARM), brought together resource researchers and managers to examine the management of coastal fish stocks and existing resource databases in South and Southeast Asia. The results of the Workshop, documented in this volume, highlight the severe problems related to the management of coastal fish stocks throughout the region. All countries recognize that it is time to remedy these problems and that solutions require multiple action.

Sustainable management of coral reefs in the Caribbean Sea

Coral reefs are based on a fragile and easily disrupted symbiosis between microalgs.e and coral polyps. The corals, together with macro-algae, form the base of a food web that supports a highly diverse ecosystem. The primary productivity of the system is very high but it is vulnerable to the effects of global warming and environmental degradation caused by physical damage to reefs, by sedimentation and by pollution from plant nutrients, chemical wastes, herbicides, pesticides and oil.

Small scale fisheries in the neotrophics: research and management issues

The lack of comprehensive regional treatments of small scale fisheries and the need for improved information for management purposes of this sector in the region are emphasized. Estimating total catches, mapping the seasonal deployment of fleets and quantifying their fishing effort as well as computing catch per unit effort and cost per unit catch for all major gears/species are crucial. In addition, the need to understand oftenly neglected issues, such as the mobility of fisherfolk in and out of the fishery and the role of women in production, distribution and trade are emphasized.

Simple broodstock management to control indirect selection and inbreeding: Indian carp example.

Following a survey of the important traits of Indian carp broodstock at some southern Indian hatcheries, it was found that the broodstock selection was size selective, exerting strong, negative selection of prematuration growth rate and positive selection on age at first maturation. This meant that the hatchery bred inadvertently slower growing and later maturing individuals. Details are given of approaches to avoid such negative selection and minimize inbreeding.

Rapid assessment of management parameters for coral reefs

While biological and oceanographic parameters form the central part of a database on coral reefs, information concerning human uses and impacts, as well as management efforts are essential to understanding the dynamics involved in changes occurring in this important component of the world ecosystem. As a means of facilitating this important understanding, Project RAMP (Rapid Assessment of Management Parameters) was developed to be integrated into the worldwide coral reef database project (ReefBase).

Management of rainfed aquaculture on Malawian smallholdings

Traditional pond construction and aquaculture technologies mandate the exploitation of limited water resources. The result is often a lowering of water qualilty and quantity available for alternative uses and users. Rainfed ponds might offer a non-polluting alternative, and make fish farming feasible for a wider variety of potential adopters. Microclimatic effects of holding water on the land might also create positive environment impacts on the farm itself, and over a larger area if widely implemented.

Hydro-biological models for water management in the Mekong River

Among users of the water resource are fishes and fishermen. Given the importance of fisheries in the Lower Mekong River Basin, water management schemes must take the fish resource into consideration. Therefore hydrological modelling must encompass hydrobiological issues of critical importance for fisheries. This presentation is an overview of the practical aspects of modelling the relationship between water flow and fish production. The different ways of addressing this issue are listed, together with their corresponding data requirements.

Escape gaps: an option for the management of Caribbean trap fisheries

The use of escape gaps set in the comers of Antillean fish traps is suggested as a management mechanism for the intensive trap fisheries of the Caribbean. Escape gaps could be rectangular or diamond-shaped. Rectangular apertures provide two dimensions (width and the diagonal) that can be adjusted to permit the escape of deep-bodied slender fishes while retaining round-bodied fishes and crustaceans. Diamond-shaped escape gaps provide height, width and, to a degree, body shape as controlling dimensions.

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