{"id":2337,"date":"2025-10-15T08:30:59","date_gmt":"2025-10-15T08:30:59","guid":{"rendered":"https:\/\/arkreflectionsias.com\/studentportal\/?p=2337"},"modified":"2025-10-15T08:30:59","modified_gmt":"2025-10-15T08:30:59","slug":"special-article-15th-october-2025","status":"publish","type":"post","link":"https:\/\/arkreflectionsias.com\/studentportal\/2025\/10\/15\/special-article-15th-october-2025\/","title":{"rendered":"Special Article 15th October 2025"},"content":{"rendered":"<h1><strong><u>Microplastic pollution<\/u><\/strong><\/h1>\n<p><strong>General Studies Paper III (GS-3) \u2013 <\/strong>Environment and Ecology<\/p>\n<p><strong>Context: <\/strong>Recent study found alarming microplastic contamination in commercial fish along Goa\u2019s coast, threatening estuarine fisheries and human health.\u200b<\/p>\n<p><strong>What is Microplastic?<\/strong><\/p>\n<table style=\"height: 204px;\" width=\"938\">\n<tbody>\n<tr>\n<td><strong>Aspect<\/strong><\/td>\n<td><strong>Details<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Definition<\/td>\n<td>Plastic particles &lt;5mm, including fragments, fibers, films, beads.<\/td>\n<\/tr>\n<tr>\n<td>Origin<\/td>\n<td>&#8211; Primary: Microbeads in cosmetics, pellets.<br \/>\n&#8211; Secondary: Breakdown of larger plastics\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Persistence<\/td>\n<td>Do not biodegrade; remain for centuries in ecosystems\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Entry into Ocean<\/td>\n<td>Via runoff, wastewater, wind, direct littering, rivers and estuaries\u200b.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Goa Study: Estuarine Fisheries Under Threat<\/strong><\/p>\n<ul>\n<li>Analyzed 251 fishes (nine species) from Mandovi estuary by feeding type: filter feeders, secondary consumers, carnivores.\u200b<\/li>\n<li>Aim: Trace microplastic bioaccumulation, identify ingestion pathways, assess risks for fish and humans.\u200b<\/li>\n<li>Bamboo shark (apex predator) and shellfish (71 samples) included.<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><strong>Key Findings<\/strong><\/p>\n<table style=\"height: 271px;\" width=\"993\">\n<tbody>\n<tr>\n<td><strong>Metric<\/strong><\/td>\n<td><strong>Details<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Microplastic Count<\/td>\n<td>4,871 total particles, 3,369 plastics from 19 polymers (11 toxic); 120 MP\/litre in water\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Per Fish Species<\/td>\n<td>Anchovies (8.8 MP\/fish), Catfish (&gt;10 MP\/fish), Bamboo shark (3.5 MP\/fish)\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Distribution<\/td>\n<td>Higher in benthic zone (sea floor\/sediment); benthic fish (catfish) had most contamination.<\/td>\n<\/tr>\n<tr>\n<td>Bioaccumulation<\/td>\n<td>Shellfish: 66\/71 had poor nutrition; particles mostly in digestive tract (fish) vs. gills\u200b.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Sources of Microplastics<\/strong><\/p>\n<ul>\n<li>Discarded fishing gear and nets.<\/li>\n<li>Wastewater and urban runoff from settlements.<\/li>\n<li>Tire residue and e-waste.<\/li>\n<li>Packaging and textile fibers identified via shape\/color analysis.\u200b<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><strong>Biological &amp; Ecological Effects<\/strong><\/p>\n<p><strong>Impact on Fish<\/strong><\/p>\n<ul>\n<li>Genetic disruption, oxidative stress, and reproductive damage.\u200b<\/li>\n<li>Lower growth and nutritional value; respiratory issues due to gill blockage.<\/li>\n<li>Filter feeders most affected; benthic species highly susceptible.\u200b<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><strong>Impact on Humans<\/strong><\/p>\n<ul>\n<li>Consumption of contaminated seafood linked to immune dysfunction, cancer risk, and neurotoxicity.<\/li>\n<li>Threat to livelihood if fish quality and demand decline.\u200b<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><strong>Bioaccumulation &amp; Biomagnification<\/strong><\/p>\n<ul>\n<li>Microplastics accumulate in organism tissues and increase up the food chain, reaching humans.\u200b<\/li>\n<\/ul>\n<p><strong>\u00a0<\/strong><strong>Estuaries: Importance and Vulnerability<\/strong><\/p>\n<ul>\n<li>Mandovi-Zuari system produces 97% of Goa\u2019s fish; estuaries act as sinks for upstream microplastics.\u200b<\/li>\n<li>Benthic sediments trap microplastics, exposing bottom-dwelling species to high contamination.<\/li>\n<li>Support diverse finfish, shellfish, filter feeders\u2014especially vulnerable to pollution.<\/li>\n<\/ul>\n<p><strong>Specific Results<\/strong><\/p>\n<table style=\"height: 257px;\" width=\"1031\">\n<tbody>\n<tr>\n<td><strong>Sample Data<\/strong><\/td>\n<td><strong>Details<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Species Sampled<\/td>\n<td>30 each: mackerel, sardine, anchovy, bamboo shark, sole, catfish, clams, oysters; 11 green mussels\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Particle Ingestion<\/td>\n<td>More microplastics found in digestive tracts than gills; confirms intake from contaminated prey\/water\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Trends<\/td>\n<td>Benthic fish highest accumulation; lower in longer-bodied fish\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Shellfish<\/td>\n<td>66\/71 with poor nutritional status, indicating ecosystem-wide stress\u200b.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Shape and Color Analysis<\/strong><\/p>\n<table style=\"height: 373px;\" width=\"1004\">\n<tbody>\n<tr>\n<td><strong>Shape \/ Color<\/strong><\/td>\n<td><strong>Potential Sources &amp; Notes<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Fiber (53%)<\/td>\n<td>Fishing nets, textiles\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Fragment (29.9%)<\/td>\n<td>Packaging, e-waste\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Film (13.1%)<\/td>\n<td>Degraded plastic\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Bead (4%)<\/td>\n<td>Cosmetics, industry\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Blue (37.6%)<\/td>\n<td>Nets\/gear\u2014most common color\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Black (24.3%)<\/td>\n<td>Tire residue, e-waste\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Red (12%)<\/td>\n<td>Packaging, textiles\u200b.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Risk Assessment<\/strong><\/p>\n<table style=\"height: 198px;\" width=\"1002\">\n<tbody>\n<tr>\n<td><strong>Aspect<\/strong><\/td>\n<td><strong>Details<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Fish\/Ecosystem<\/td>\n<td>Highest hazard to benthic life (category IV\u2013V)\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Human Consumers<\/td>\n<td>Medium\u2013high risk, especially from highly toxic polymers\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Shellfish<\/td>\n<td>Most affected; poor nutritional status, direct risk to humans\u200b.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>Key Concepts Table<\/strong><\/p>\n<table style=\"height: 242px;\" width=\"990\">\n<tbody>\n<tr>\n<td><strong>Term<\/strong><\/td>\n<td><strong>Meaning<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Bioaccumulation<\/td>\n<td>Toxin buildup in tissues via direct exposure\/diet\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Biomagnification<\/td>\n<td>Increased toxin levels at higher trophic levels\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Benthic<\/td>\n<td>Bottom-dwelling zone\/species\u200b.<\/td>\n<\/tr>\n<tr>\n<td>Pelagic<\/td>\n<td>Open-water zone\/speci<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Microplastic pollution General Studies Paper III (GS-3) \u2013 Environment and Ecology Context: Recent study found alarming microplastic contamination<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"class_list":["post-2337","post","type-post","status-publish","format-standard","hentry","category-special-article"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":"","morenews-large":"","morenews-medium":""},"author_info":{"display_name":"Nithin DTPoperator","author_link":"https:\/\/arkreflectionsias.com\/studentportal\/author\/nithindtp\/"},"category_info":"<a href=\"https:\/\/arkreflectionsias.com\/studentportal\/category\/special-article\/\" rel=\"category tag\">SPECIAL ARTICLE<\/a>","tag_info":"SPECIAL ARTICLE","comment_count":"0","_links":{"self":[{"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/posts\/2337","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/comments?post=2337"}],"version-history":[{"count":1,"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/posts\/2337\/revisions"}],"predecessor-version":[{"id":2338,"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/posts\/2337\/revisions\/2338"}],"wp:attachment":[{"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/media?parent=2337"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/categories?post=2337"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/arkreflectionsias.com\/studentportal\/wp-json\/wp\/v2\/tags?post=2337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}