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Yemaya recommends: Fished! The fisher women of Mumbai
Full text linkDirected by Daya Gupta; Duration 19 min 28 sec; Language: English. This short video gives a bird’s-eye view of the lives of Koliwomen. The Kolis are a traditional fishing community from Mumbai, India – one of the original inhabitants of this island city of mostly migrants. The women form a formidable force in the fishing industry of Mumbai. Although they are not involved with the catch, most of the other aspects are handled by them, such as the sorting, cleaning, drying, packing and selling fish in the local markets..
Crecimiento y condición otoñal de larvas de anchoíta en la Zona Común de Pesca Argentino-Uruguaya
Full text linkSe determinó el crecimiento y la condición nutricional de larvas de Engraulis anchoita en la Zona Común de Pesca Argentino-Uruguaya (ZCPAU). La condición se estimó a partir de la relación ARN/ADN estandarizada (RDs) del tronco muscular. El crecimiento se estudió calculando una tasa de crecimiento instantáneo sobre la base de un modelo que incluye RDs y temperatura. Se calculó, además, el crecimiento de los otolitos midiendo el espesor de los últimos tres incrementos completamente formados. Las muestras se obtuvieron en marzo de 2014. Los 12 lances oblicuos que se realizaron con red Bongo y malla de 300 µm mostraron presencia de larvas en seis de ellos. Se las separó a bordo y se fijaron en nitrógeno líquido. Posteriormente se las midió, se separaron las cabezas con un bisturí y se liofilizaron los troncos musculares en forma individual (N = 128). Se compararon dos secciones oceanográficas situadas sobre el margen sur y el margen norte de la ZCPAU (COSTAL I y II, respectivamente). La relación RDs de las larvas evidenció una buena condición nutricional. No se observaron diferencias significativas en la condición o el crecimiento entre ambas secciones. Se observó una correlación positiva entre el índice RDs y la talla, por lo que las comparaciones se realizaron considerando el estadio de desarrollo larval. El RDs para las larvas en preflexión en la COSTAL I fue 2,53 ± 1,29 (n = 53) y 2,92 ± 1,22 (n = 7) en la COSTAL II. Para las larvas en flexión fue 3,41 ± 1,07 (n = 22) y 2,91 ± 0,86 (n = 32) en las secciones I y II, respectivamente. La elevada condición nutricional de las larvas de anchoíta indica que las características ambientales que se observaron en marzo en el área de estudio serían apropiadas para su crecimiento y supervivencia
Expression of estrogenic response genes to different concentration of 17ß-estradiol in male mosquitofish (Gambusia yucatana)
Full text linkThe proximate composition, amino acids and fatty acids composition in the muscle of wild, inshore and offshore cage-cultured large yellow croaker, Pseudosciaena crocea (Richardson, 1846), were determined to identify nutritional differences. Wild fish groups showed highest content of moisture and crude protein, but the lowest lipid content. Offshore cage-cultured fish showed significantly higher content of moisture and crude protein content, but lower crude lipid content than inshore cage-cultured fish. The content of aspartic acid, glutamic acid, and alanine was higher in wild large yellow croaker than inshore cage-cultured groups, but similar to offshore cage-cultured fish. Significant lower contents of total amino acids, essential amino acids, non-essential amino acids and flavor-enhancing amino acids content were recorded in two cultured fish groups than those in wild group. While no major differences in fatty acids composition were found between wild and cage-cultured groups except for linoleic acid. The fish from offshore cages has much better nutrient profile than inshore cage cultured fish, but was still inferior compared to wild fish
Oyster Integrated Mapping and Monitoring Program report for the State of Florida
Full text linkOysters provide a variety of critical ecosystem services to coastal communities in Florida. They improve water quality and clarity as they filter feed, lessen shoreline erosion, and provide a habitat or food source for a wide variety of birds, fish, and invertebrates. Oysters are commercially valuable as a harvested food source, and historically their shell has been mined extensively for construction material. The eastern oyster (Crassostrea virginica) is the only reef-building oyster in Florida and forms both subtidal and intertidal reefs. Numerous other species of non-reef-building oysters are less frequent. This report focuses primarily on the eastern oyster, because it is the most abundant oyster in Florida and because it is important as both a keystone species and an ecosystem engineer
Interspecific isozyme variability in Porcellanid crabs (Crustacea: Decapoda: Anomura) from the coastal waters of Pakistan
Full text linkPolyacrylamide gel electrophoresis was used to investigate the interspecific isozyme variability among three species of Porcellanid crabs: Petrolisthes ornatus, P. rufescens and P. boscii from the coastal waters of Karachi, Pakistan. Seven enzyme systems and the general protein (non-specific) were examined for genetic variations. Among the three species; Nei's heterozygosity for overall loci was observed (0.067), whereas Shannon’s information Index (I) for genetic variations based on the heterozygosity was (0.055) in three species of Genus Petrolisthes. Species were differentiated from each other as Nei’s genetic distance ranged in between 0.0093- 0.0314. The genetic relationship among the three species of genus Petrolisthes similar from those inferred from morphological features
Malaysia: About to disappear
No full textA field trip to Teluk Bahang, a fishing village on the north-western tip of Penang in Malaysia, shed light on the lives of small-scale fishers. Malaysian fisherwoman Ani Zubaida did not mince words when she spoke about the adverse impact of trawlers on her life: “Trawlers are stealing our fish. They should not be allowed to fish in the territory of small-scale fishers. Else, we will be forced to quit this job.
Status of Ornamental Fish Industry in the Philippines: Prospects for Development
Full text linkThe ornamental fish business is a lucrative industry worldwide with huge prospects for livelihood and trade, but the Philippines has not developed this industry to its full potential due to some constraints. This study was conducted to assess the ornamental fish industry in the Philippines using purposive survey interview and focal group discussions in major production areas in the country to determine aspects for development. Information on key stakeholders in the marine and freshwater ornamental fish sector; quantity and value of production by region and by species; and trade were generated from the study. Approximately 8,911,879 pieces of marine ornamental fish were exchanged per year, contributing to PHP 137,165,576 in the country’s annual trade. Production of freshwater ornamental fish was 14,304,739 pieces valued at PHP 145,958,667. The bulk of marine ornamental fish supply came from regions with coral reef areas teeming with marine ornamentals, namely: Regions IV-A (65.56%), III (23.18%), and VII (4.63%). Freshwater ornamental fish were produced mainly by Regions IV-A (34.29%), XI (35.41%), VI (11.96%) and III (10.43%) which have existing local markets. The center of trade for marine ornamental fish is Metro Manila and Cebu City due to the presence of international airports. Meanwhile, freshwater ornamental trade is concentrated in major cities and municipalities given the significant number of local hobbyists. An ornamental fish development program is needed to attain the full potential of the industry with an emphasis on (1) captive breeding of marine ornamental and freshwater indigenous fish, (2) tapping the export market for freshwater ornamental fish, and (3) promoting the sustainability of wild-caught marine ornamental fish
2017 OFR demonstration site monitoring and analyses: Effects on soil hydrology and salinity, and potential implications on soil oxygen
Full text linkOn-farm recharge (OFR) is a practice that uses surface water to alleviate demand on and replenish groundwater supplies. It can take on two forms: in lieu recharge and direct recharge. In lieu recharge utilizes surface water supplies instead of groundwater to irrigate crops. Direct recharge applies water beyond the needs of the crop and replenishes the groundwater supply. ...
The present study examined OFR with grapes, walnuts, and pistachios at six sites in the San Joaquin Valley, plus one additional site from a previous study, also in the San Joaquin Valley. Each site was comprised of a recharge plot that received direct recharge paired with a control plot with the same crop and soil characteristics, but meant to receive in lieu recharge (via the flood system) or drip application with groundwater. At the end of the 2017 recharge demonstration, however, three control plots had also received direct recharge from water applications that exceeded the crop’s water demand. At another site, both control and test plots had only received in lieu recharge due to limited surface water amounts or the host growers’ more conservative volume of water application. ...
The present study only covers one season of recharge. Long-term effects of recharge are not described by the present study and will require further monitoring. Further study is needed of the dynamics of soil oxygen during and after recharge events. Similarly, the fate of the water after it infiltrates past the root zone is not always known and the rate at which recharged water will reach an aquifer is seldom known for deep aquifers. A method to predict the fate of water quickly and broadly would be quite helpful in developing an on-farm recharge strategy. The present study does not look at the effects of recharge on soil biological processes, such as microbial respiration and plant oxygen demand. Further study of the recharge tolerance of specific species and rootstocks, as well as the impact on plant disease, is crucial
Determination of some heavy metal levels in three freshwater fish in Keban Dam Lake (Turkey) for public consumption
Full text linkDue to industrialization, a number of factories and human population have increased rapidly. As a result, the amount of waste matter such as heavy metals released to the environment has been increased. Specifically aquatic systems are more sensitive to heavy metal pollution and the gradual increase in the levels of such metals in aquatic environments, mainly due to anthropogenic sources, have become a problem of primary concern (Ashraf et al., 2012). The natural aquatic ecosystems may extensively be contaminated with heavy metals released from domestic, industrial and other anthropogenic activities (Kamaruzzaman et al., 2011)
Blood biochemical changes in common carp (Cyprinus carpio) upon co-exposure to titanium dioxide nanoparticles and paraquat
Full text linkResearch on eliminating organic pollutants in water by using heterogeneous photocatalysts such as nano-TiO_2 abound. However, the question is whether metabolites, resulting from optical dispersion of environmental pollutants, are still toxic to aquatic organisms. Therefore, this study was designed to evaluate the effect of a co-exposure to paraquat and TiO_2-NPs on blood biochemical indices of common carp. Fish were exposed to 0.2 and 0.4 mg L^-1 paraquat with 0.125 mg L^-1 TiO_2-NPs for 21 days under different light conditions, including natural photoperiod (16 L 8h^-1 D) and complete darkness. No significant alterations in the Aspartate aminotransferase (AST), Alanine aminotransferase (ALT), Lactate dehydrogenase (LDH), Alkaline phosphatase (ALP) and Creatine phosphokinase (CPK), activities and total protein, albumin, globulin, glucose, cholesterol and triglyceride levels were observed in fish exposed to TiO_2-NPs and 0.2 mg L^-1 paraquat under normal lighting conditions. However, a significant change in blood biochemical indices in fish exposed to TiO2-NPs with 0.4 mg L^-1 paraquat (16 L 8h^-1 D) and in fish exposed to TiO_2-NPs and paraquat (under darkness). A significant decrease in the activity of Gamma-glutamyltransferase (GGT) and a significant increase in creatinine level were observed in all groups which were exposed to TiO_2-NPs and paraquat. The results of this study indicate that using 0.125 mg L^-1 nano-TiO2 in order to remove paraquat (0.2 mg L^-1) under lighting conditions can minimize the adverse effects of paraquat and its metabolites on blood biochemical indices of fish. So, using nano-TiO_2 (0.125 mg L^-1) to remove paraquat under lighting conditions can significantly reduce its toxic effects