Group items matching

in title, tags, annotations or url

Located approximately 25 km off the coast of Balochistan province, Astola is Pakistan's largest offshore island. Also known as "Jezira Haft Talar" (Island of the Seven Hills) due to the small, rocky mountains that span the 6.7 km2 island, this scenic spot has all the hallmarks of a tourist getaway - sandy beaches, clear waters, and the sort of variety of marine life often found tucked away in remote and pristine corners of the world.

Pakistani marine forces have arrested 45 Indian fishermen for violating territorial waters in the Arabian Sea, police said Saturday.Pakistan's Maritime Security Agency (MSA) detained the fishermen on Friday after they strayed into Pakistani waters, and they were handed over to local police in the port city of Karachi, a senior police official told AFP.

Pakistani marine forces have arrested 45 Indian fishermen for violating territorial waters in the Arabian Sea, police said Saturday.Pakistan's Maritime Security Agency (MSA) detained the fishermen on Friday after they strayed into Pakistani waters, and they were handed over to local police in the port city of Karachi, a senior police official told AFP.

A microplastics (MPs) emergence study in pelagic and mesopelagic species was carried out to delineate coastal degradation and ecosystem status around the Karachi metropolis. Species of high commercial and ecological worth were sampled using a gillnet of 1.5 cm knot-to-knot mesh size in November and December 2021. In total twenty-six individuals including Liza subviridis (15), Thryssa dussumieri (3), Rastrelliger kanagurta (2), and Portunus sanguinolentus (6) were used to perceive MPs. A strong linearity between body length and MPs (R2 = 0.937, SE 0.071 and R2 = 0.928, SE 0.104) were calculated for L. subviridis and P. sangiuilatus, respectively. However, the data of T. dussummeiri and R. Kanagurta showed minimization failure. The MPs in GIT were extracted using direct observation under a sophisticated binuclear microscope and chemical digestion (KOH) together with wet peroxide oxidation (H2O2+FeSO4) methods. The MP materials were categorized as foam, film, fiber, fragment, and beads of three different sizes 170, 120, 100 μm in the stomach, intestine, and esophagus. Film-type MPs appeared frequently, whereas beads were rarely seen. It is hoped that this baseline research would help to minimize industrial release, recognize critical knowledge gaps, and demonstrate MP flux being released into the aquatic environment. The results will support mitigation of this emerging threat to the living resources around the Karachi coastal area.

Quantitatively assessing the porewater dissolved inorganic carbon (DIC) cycling in methane-enriched marine sediments is crucial to understanding the contributions of different carbon sources to the global marine carbon pool. In this study, Makran accretionary wedge was divided into Zone 1 (high methane flux area) and Zone 2 (background area). Porewater geochemical compositions (Cl-, SO42-, NH4+, Mg2+, Ca2+, Ba2+, DIC and δ13C-DIC) and a reaction-transport model were used to determine the DIC source and calculate the DIC flux through carbonate precipitation and releasing into overlying seawater in sediments. Zone 1 is characterized by the shallower depth of sulfate-methane transition (SMT), where most of porewater sulfate was consumed by anaerobic oxidation of methane (AOM). In contrast, a relatively low flux of methane diffusion in Zone 2 results in a deeper SMT depth and shallow sulfate is predominantly consumed by organoclastic sulfate reduction (OSR). Based on the porewater geochemical profiles and δ13C mass balance, the proportions of porewater DIC originating from methane were calculated as 51% in Zone 1 and nearly 0% in Zone 2. An increase of porewater DIC concentration leads to authigenic carbonate precipitation. Solid total inorganic carbon (TIC), X-ray diffractometry (XRD) and scanning electron microscopy (SEM) analysis display that carbonate content increases with depth and aragonite appears at or below the depths of SMT. Meanwhile, the flux of DIC released from sediments calculated by the reaction-transport model is 51.3 ~ 90.4 mmol/m2·yr in Zone 1, which is significantly higher than that in Zone 2 (22.4 mmol/m2·yr). This study demonstrates that AOM serves as the dominant biogeochemical process regulating the porewater DIC cycle, which has an important impact on the authigenic carbonate burial and the seawater carbonate chemistry.

After Fighting Over Mountains, India and China Lock Horns in the Indian Ocean.

South Asia Meet on Oil, Chemical Spill.

South Asia Meet on Oil, Chemical Spill.

Danish navy frees 12 hostages, holds16 Somali pirates.

U.S. Navy Rescues 10 From Iranian Ship on Fire.

Danes free 18 hostages held by Somali pirates.

Seychelles court of appeal acquits 3 suspected Somali pirates convicted of piracy.

Pakistani boat blows self up after India navy chase.

Pakistani boat blows self up after India navy chase.

Pakistan's coastal villagers retreat as seas gobble land.

Gujarat braces for cyclone Nilofar.

Somalia: Puntland says fishing trawler opens fire on herders.