When working with length frequency date, we often need to compute the mean weights of the fish in the various classes. This article outlines one of the methods used.
This paper explores the seafood sector in Indonesia, using fish supply-demand modeling, with special focus on the growing role of aquaculture in the country's food portfolio. The paper describes six scenarios for future fish supply-demand dynamics and examines the role of aquaculture growth in fish supply in Indonesia.
Over recent decades it has become widely accepted that managing fisheries resources means managing human behaviour, and so understanding social and economic dynamics is just as important as understanding species biology and ecology. Until recently, fisheries managers and researchers have struggled to develop effective methods and data for social and economic analysis that can integrate with the predominantly biological approaches to fisheries management. The field is now growing fast, however, and globally, researchers are developing and testing new methods.
Aquaculture has experienced spectacular growth in the past decades, during which continuous innovation has played a significant role, but it faces increasing criticism regarding its ecological and social sustainability practices and the resulting challenges for future innovation processes. However, in the aquaculture literature, there is limited systematic knowledge of how innovation has been approached in terms of how the focus and the scope of aquaculture innovation processes are understood and managed.
Collaborating for Resilience a pour mission de catalyser le changement institutionnel dans le but de résoudre les défis communs posés par la gestion des ressources naturelles. Le présent manuel fournit une approche détaillée visant à organiser le dialogue, mener des actions conjointes et maintenir la collaboration.
Gender-transformative engagement in the management of household ponds in Bangladesh for improved fish production relies on working with the complexities of gender relations in combination with a readiness by formally-trained scientists to allow women and men farmers to "follow the technology". Innovative methodologies for technology development and dissemination need to focus on promoting farmer adaptive capacity and enabling farmers to take charge of their own learning. This is not a gender-neutral process.
Hydropower development with concomitant changes in water and land regimes often results in livelihood transformation of affected people, entailing changes in intra-household decision-making upon which livelihood strategies are based. Economic factors underlying gender dimensions of household decision-making have been studied rigorously since the 1970s. However, empirical data on gender and decision-making within households, needed for evidence-based action, remain scarce. This is more so in hydropower contexts.
This paper aims to devise a farmer participatory method that not only improves farmer management of natural resources, but also monitors the impact of improvements. This assessment is made in terms of: economic efficiency, biological material recycling, species biodiversity and material input-output balance. Results suggest that high performance in all indicators can occur simultaneously and that economic loss from crop failure does not jeopardise performance in biodiversity and recycling.
Production of the mola carplet (Amblypharyngodon mola), a small vitamin A rich fish, has the potential to reduce human malnutrition in Bangladesh. However, although efforts have been made to promote mola culture, the factors affecting its production are poorly understood. Therefore, this study was undertaken to identify factors contributing to mola productivity in polyculture systems. The study indicates that application of appropriate inputs could be considered to maximize production of mola in future projects attempting to promote its culture.
This paper describes the efforts to establish a network of community-conserved areas in the municipality of San Mariano on Luzon, with the dual aim to protect the Philippine crocodile and to improve inland fisheries. The necessary steps to establish a community-conserved area are summarized, and their sustainability assessed.