Aquatic Commons
Not a member yet
22986 research outputs found
Sort by
Yemaya Revista Del CIAPA Sobre El Genero en La Pesca, Núm. 61, Agosto 2020
Full text linkPublicación virtual de un nuevo número de Yemaya, la revista del CIAPA sobre el género en la pesca, en castellano. El último número de Yemaya (núm.61), la revista del Colectivo Internacional de Apoyo al Pescador Artesanal (CIAPA) sobre temas de género en la pesca, publicado en inglés en agosto de 2020, se encuentra ahora disponible también en lengua española en
Fisheries policy: Chewing the policy cud
No full textReflections on the ICSF workshop and recommendations to India’s draft National Inland Fisheries and Aquaculture Policy (NIFAP), September 2019. The International Collective in Support of Fishworkers (ICSF) organized a national workshop to discuss the draft National Inland Fisheries and Aquaculture Policy (NIFAP), being finalized by India’s Union Ministry of Agriculture and Farmers’ Welfare. The main objectives of the workshop, held in Kolkata on September 6-7, 2019, were to review existing social and ecological knowledge-gaps, to develop long-term and short-term recommendations—action points—for implementation, to integrate the Voluntary Guidelines for Securing Sustainable Small-Scale Fisheries in the Context of Food Security and Poverty Eradication (the SSF Guidelines) with NIFAP, and to build capacity and awareness of fishers and fishworkers about the draft policy and its realization
Chile: No more blood and fire
No full textFor the first time in Chile, a new type of autonomous social movement, including fishworker organizations, seeks to create a democratic and representative constitution. Three major organizations in Chile have rejected the Social Agenda for Artisanal Fishers that President Sebastián Piñera’s government had proposed. (The proposal is called ‘Agenda social para los pescadores artesanales’ in Spanish.) The three organizations—the Consejo Nacional por la Defensa del Patrimonio Pesquero (Condepp), the Confederación de Federaciones de Pescadores Artesanales de Chile (Confepach), and the Red Nacional de Mujeres de la Pesca Artesanal de Chile—together represent 80 per cent of the artisanal fishers in the South American country
The Yemaya no.60, April 2020: Supplement
Full text linkThe Yemaya Supplement, Turning Points: A decade of change for women in fisheries, focuses on a change that has happened over a decade: a truthful appreciation of women’s role in fisheries. Their involvement in the sector follows a similar arc the world over, despite wide differences in society, culture, politics and economics. This supplement is an effort to understand and identify the main factors affecting this over the decade -- the causes that have shaped their role, both positively and negatively
Japan: The way ahead
Full text linkThe exclusion of women from organizing bodies is a key challenge facing women in Japan’s coastal fisheries. In Japan, the Fishery Cooperative Associations (FCAs) are key entities in the effort to protect the environment in coastal fisheries. They manage traditional fishing rights with legal support from the government, and are embedded into a multi-layer management system – including Total Allowable Catch controls for some species, effort control by Total Allowable Effort, prefectural government licensing systems, and traditional rights based management. Women in Japanese coastal communities have been organized and connected to FCAs for many years
SSF: Women fish more than you think!
Full text linkWomen’s small-scale, part-time fishing and gleaning activities globally may contribute nearly 3 million tonnes of seafood, with a landed value of around $5.6 billion. In many cultures and contexts around the world, fishing (like hunting) is considered a male domain and is closely associated with masculinity. Moving along the fish value chain from fishing to processing, more women appear. In fact, much of the labour needed to convert fish into consumable products is done by women. The role of women is more visible in seafood processing, especially on an industrial scale, than in fishing activities
Growth, Development, and Survival of Portunus pelagicus Larvae and Juveniles in Different Feed Regimens, Rearing Media, and Stocking Densities
Full text linkVarious factors in P. pelagicus seed production and grow-out culture were investigated in this study. Experiments were conducted to 1) compare natural and artificial feeds for larval production, 2) evaluate indoor tank and outdoor net cages as rearing media, and 3) assess different stocking densities for grow-out culture. Growth, development, and survival were assessed for the performance of each variable. (I) In larval production, the development of megalopa larvae into crab instar was synchronous in both natural and artificial feed treatments in a 5-day rearing observation. Crab instars began to appear on Day 4 with 27% composition in both feeds. Although survival appeared to be relatively higher in natural feed (43.96 ± 6.04%), this was not significant from survival in artificial feed treatment (33.33 ± 13.34), (t = 0.726, p > 0.05). (II) In Phase I grow-out culture, a two-variable design experiment was conducted to assess growth performance and survival of crab juveniles reared in indoor tanks and outdoor net cages at different stocking densities. Specific growth rate (SGR) differed significantly (t = 2.937, p 0.05). Furthermore, two-factor ANOVA results have shown that growth performance of the juveniles was influenced by both the differences in rearing medium and stocking density, but not in terms of survival (F = 0.120, p = 0.888). (III) In Phase II grow-out culture, juveniles attained highest SGR (3.54 ± 0.56%.d-1) at 5 ind.m-2 stocking density. This was followed by 15 ind.m-2 (3.45 ± 2.39%.d-1) and by 10 ind.m-2 (2.33 ± 0.50%.d-1) (p > 0.05). However, survival rate was highest in 15 ind.m-2 (46.67 ± 0.00%), but the differences among other stocking densities were not statistically significant (p > 0.05). Overall, results suggest that artificial feed can be an alternative for Artemia in rearing megalopae to crab instar stage. Stocking density in Phase I and II grow-out culture did not substantially affect growth performance and survival of juvenile P. pelagicus. However, higher stocking density increases incidence of cannibalism among reared crabs
Efectos de la densidad de siembra y el desdoble sobre el crecimiento y la supervivencia en un cultivo suspendido experimental del mejillón Mytilus platensis d’Orbigny, 1842, en el Golfo San Jorge, Argentina
Full text linkEn los últimos años, ha habido un renovado interés en el desarrollo del cultivo de mejillones en la Argentina. Sin embargo, esta actividad todavía tiene lugar a pequeña escala o de forma experimental en la región patagónica. Conocer los efectos de las densidades iniciales y el desdoble sobre el crecimiento y la supervivencia en un cultivo experimental es información de base necesaria para el desarrollo de experiencias que permitan estudiar parámetros productivos en cultivos a mayor escala. Por estos motivos, este trabajo tuvo como objetivo analizar el efecto de las densidades iniciales y el desdoble sobre el crecimiento y la supervivencia del mejillón Mytilus platensis en un cultivo suspendido experimental en la región costera central del Golfo San Jorge, Argentina. Para ello, se estudiaron dos técnicas de cultivo, con y sin desdoble, durante un período de 9 meses, a dos densidades iniciales (400 y 700 ind. m-1). La semilla fue obtenida de un criadero artificial. Se monitorearon talla, peso y supervivencia de los mejillones. El mayor crecimiento en talla y peso, y la supervivencia más elevada se observaron en la estrategia sin desdoble con la densidad más baja. En esta estrategia, los animales alcanzaron una talla promedio mayor a 65 mm, llegando a la talla comercial en menos de un año. Estos resultados permiten concluir que, a pequeña escala, la estrategia sin desdoble es la recomendada para cultivar mejillones en la región a una densidad de 400 ind. m-1 durante un mínimo de 9 meses
Heavy metal accumulation in sea cucumber Actinopyga mauritiana (Echinodermata-Holothuroidea) from Cape Monze Beach Karachi, Pakistan
Full text linkIn the present study sea cucumber Actinopyga mauritiana, water and sediment samples collected during September to December 2018. Six heavy metals (Fe, Cu, Mn, Zn, Pb, and Cd) were analyzed in tissues (muscles, tentacles and guts), water and sediment by atomic absorption spectrophotometer (AAS). The average measured levels of heavy metals Fe, Cu, Mn, Zn, Pb and Cd in A. mauritiana muscle, tentacle and gut was 42.20 ± 9.47, 3.14 ± 0.48, 0.38 ± 0.22, 11.42 ± 4.34, 0.03 ± 0.00 and 0.02 ± 0.00; 36.90 ± 8.14, 3.22 ± 0.60, 0.40 ± 0.27, 10.50 ± 1.70, 0.04 ± 0.05 and 0.03 ± 0.02; 21.54 ± 5.06, 2.32 ± 0.66, 0.53 ± 0.16, 13.13 ± 2.90, 0.02 ± 0.02 and 0.02 ± 0.01 μg g−1 respectively. It is useful to monitor all metal accumulation in the future.
Variación morfológica de la concha de Zidona dufresnei (Caenogastropoda: Volutidae) del suroeste del Océano Atlántico
Full text linkEl gastrópodo volutido Zidona dufresnei es un importante recurso pesquero del suroeste del Océano Atlántico. Esta especie exhibe fuertes diferencias interpoblacionales en las características de la historia de vida, lo que lleva a postular la existencia de dos morfotipos (“normal” y “enano”). En este estudio, se combinaron y compararon la morfometría tradicional y geométrica para establecer la variación de la forma de concha de Z. dufresnei entre tres poblaciones desde Mar del Plata (37° S) hasta el golfo de San Matías (42° S), para probar la hipótesis de que la variación fenotípica ya descrita en el ciclo de vida y el tamaño también se expresa en la forma de la concha. Se detectaron diferencias significativas en la morfología de la concha entre estas tres poblaciones, principalmente asociadas con el tamaño máximo de los individuos y la forma de la concha. El morfotipo Bahía San Antonio tenía conchas con mayor redondez y peso general en comparación con los morfotipos del golfo de San Matías y Mar del Plata, los cuales no estaban diferenciados. Nuestros resultados apoyan la hipótesis de Lahille (1895) quien distinguió el morfotipo de Bahía San Antonio (morfotipo “enano”) como Voluta angulata affinis. La importancia funcional de la variabilidad encontrada se discute en términos de los efectos ecológicos y genéticos sobre la forma y el tamaño