WorldFish Community: Recent submissions
Now showing items 3601-3620 of 5196
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Improving productivity in tropical lakes and reservoirs
(2006)Type: ReportIn this review we will discuss the potential for increasing production within natural lakes or manmade reservoirs based on the various enhancement concepts. Enhancements are interventions in natural aquatic resources, and ... -
Restocking and stock enhancement of coastal fisheries: Potential, problems and progress
(2006)Type: Journal ArticleThe demand for fish is expected to rise substantially by 2020. Although aquaculture must provide much of the additional fish, it remains to be seen whether restored or enhanced capture fisheries can also help fill the ... -
Nile tilapia (Oreochromis niloticus) seed production in irrigated rice-fields in Northwest Bangladesh-an approach appropriate for poorer farmers?
(2006)Type: Journal ArticleParticipatory research was conducted with poorer farmers in two communities, Girai (G) and Bahagili (B) in NW Bangladesh to assess the production of Nile tilapia seed in irrigated spring rice-fields. All the selected ... -
Comparison of aquaculture extension impacts in Bangladesh
(2006)Type: Journal ArticleProduction from small scale pond aquaculture in Bangladesh trebled in the decade to 1999 under the influence of extension projects of the Department of Fisheries. The impacts of completed aquaculture extension projects and ... -
Global documentation of fish introductions: the growing crisis and recommendations for action.
(2006)Type: Journal ArticleFish provides 15% of the total animal protein in human diets. It is also the primary source of livelihood for 35 million people (30 M in Asia and 2.6 M in Africa). The increase in global population and demand for fish ... -
Water management and wise use of wetlands: enhancing productivity
(2006)Type: Book ChapterLakes and reservoirs are affected by human interventions mainly by eutrophication. Changes in morphology are less common, although siltation and local alterations to the riparian zone can result from urbanisation,marina ... -
Genetic and environmental factors affecting growth of Nile tilapia (Oreochromis niloticus) juveniles: Modelling spatial correlations between hapas
(2006)Type: Journal ArticleThe aim of this study was to quantify the environmental and genetic effects on early growth of Nile tilapia, Oreochromis niloticus. -
Survival of Clarias gariepinus fry in earthern ponds: effects of composts and leaks
(2006)Type: Journal ArticleTo inform decisions on improving the yields of African catfish Clarias gariepinus fingerlings in earthen ponds, the hypothesis that composts and leaks were partly responsible for usually low and variable fry survivals was ... -
Advanced nursing of Clarias gariepinus (Burchell, 1822) fingerlings in earthen ponds, through recycling of tilapia recruits
(2006)Type: Journal ArticleIn an attempt to improve the stocking size and yield of Clarias gariepinus, small fingerlings (average weight=3 g) of the type usually produced by African hatcheries were stocked together with tilapia (Oreochromis niloticus) ... -
Effect of varying density and water level on the spawning response of African catfish Clarias gariepinus: Implications for seed production
(2006)Type: Journal ArticleThe development of a reliable methodology for spawning of African catfish, Clarias gariepinus without the use of hormone injections would greatly improve the prospects of aquaculture in Africa. Earlier work has shown that ... -
Heritability estimates and response to selection for growth of Nile tilapia (Oreochromis niloticus) in low-input earthen ponds
(2006)Type: Journal ArticleThis study presents results of two generations of selection (G1 and G2) for growth of Nile tilapia. The selection environment consisted of earthen ponds which were fertilized daily with 50 kg dry matter (dm)/ha chicken ... -
Genetic parameter and genotype by environment interaction for body weight of Oreochromis shiranus
(2006)Type: Journal ArticleGenetic and phenotypic parameter estimates for tagging and harvest body weights were obtained from the F1 base (377 offspring of 59 full-sib families), F2 (1241 offspring of 52 full- and 33 half-sib families) and F3 (1052 ... -
Mating systems and male reproductive success in Nile tilapia (Oreochromis niloticus): a microsatelite analysis
(2006)Type: Journal ArticleFry production in Nile tilapia, Oreochromis niloticus is typically achieved by mass spawning of males and females stocked in large hapas suspended in ponds. In such spawning aggregations, territorial behavior and reproductive ... -
Methodology for economic valuation of food security and vulnerability to poverty for inland fisheries in Africa
(2006)Type: OtherFish play an increasingly important role in national and local economies of many developing countries. Africa’s rivers, wetlands and lakes are especially important for poor rural households for whom they provide employment ... -
Decline of demersal coastal fisheries resources in three developing Asian countries
(2006)Type: Journal ArticleWorldwide, there is serious concern about the state of fisheries; yet for Asia, which accounts for half of the global fisheries production, information on the state of fisheries in order to guide management is sparse. In ... -
Genetics and the study of fisheries connectivity in Asian developing countries.
(2006)Type: Journal ArticleThe paper presents a brief summary of the available methods to determine connectivity using genetic markers and two examples where they have been applied in Southeast Asia. Recommendations for the more efficient conduct ... -
Restocking the sea cucumber Holothuria scabra: sizing no-take zones through individual-based movement modelling
(2006)Type: Journal ArticleThe valuable sea cucumber Holothuria scabra, known as ‘sandfish’, has potential for restocking. However, there is little information available to determine the size of the no-take zones (NTZs) needed to protect the released ... -
Spatial structure of demersal fish assemblages in South and Southeast Asia and implications for fisheries management
(2006)Type: Journal ArticleWe provide a review of the assemblage structure of demersal fish resources in four South and Southeast Asian countries. Multivariate techniques (classification and ordination analysis) were used to analyze scientific trawl ... -
Key issues in coastal fisheries South and Southeast Asia, outcomes of a regional initiative
(2006)Type: Journal ArticleAsia is an important region in terms of fish trade supplying nearly 60% of global fish production. The region’s coastal fisheries play a critical role in ensuring food security and providing livelihoods, particularly for ... -
A length-based multi-species model for evaluating community responses to fishing
(2006)Type: Journal ArticleQuantitative ecosystem indicators are needed to fulfill the mandate for ecosystem-based fisheries management. A variety of community metrics could potentially be used, but before reference levels for such indices can be ...
