Current Affairs Exam

Aggressive Sea Lion Behavior: Normally docile sea lions off the California coast are exhibiting unprecedented aggression, attacking humans due to a toxic algal bloom.

Domoic Acid Toxin: The diatom Pseudo-nitzschia produces domoic acid, a neurotoxin that disrupts sea

Food Chain Contamination: Domoic acid enters the marine food chain, affecting various marine life and posing a deadly threat to humans through contaminated seafood.

Upwelling and Nutrient Input: Stronger winds (linked to global warming) cause upwelling, bringing nutrient-rich water to the surface, which fuels algal blooms.

Pollution’s Role: Pollutant discharge and runoff from events like Los Angeles wildfires introduce additional nutrients, further stimulating algal growth.

Lethal Consequences: While no human deaths have been reported from sea lion attacks, the potential for lethal outcomes exists due to the size and aggression of the affected animals. Domoic acid itself is a lethal poison in high doses for humans.

Recurring Issue: This marks the fourth consecutive year of algal blooms impacting Southern California marine life.

Rehabilitation Efforts: While assistance to affected dolphins is limited, some sea lions are being taken to authorized rehabilitation facilities.

Inaugural AIKEYME Exercise: A large-scale multilateral maritime exercise, Africa India Key Maritime Engagement (AIKEYME), commenced in Dar-es-Salaam, Tanzania on April 13, 2025.

Co-hosts: Jointly hosted by India and Tanzania, highlighting shared strategic interests in the Indian Ocean Region (IOR).

Participating Nations: Includes India, Tanzania, Comoros, Djibouti, Eritrea, Kenya, Madagascar, Mauritius, Mozambique, Seychelles, and South Africa.

Objective: To develop collaborative solutions for regional maritime challenges and enhance naval interoperability.

Strategic Alignment: Aligns with India’s SAGAR (Security and Growth for All in the Region) vision and MAHASAGAR (Mutual and Holistic

Indian Naval Deployment: INS Chennai, INS Kesari, and INS Sunayna are participating. INS Sunayna is part of the Indian Ocean Ship (IOS) SAGAR mission.

Exercise Structure: Six-day exercise (April 13-18, 2025) divided into harbor and sea phases.

Harbor Phase Activities: Included an inauguration ceremony, table-top exercises focused on anti-piracy operations, seamanship training,

Sea Phase Focus: Strengthening maritime security cooperation among participating nations.

IOS SAGAR Mission: INS Sunayna’s deployment under the IOS SAGAR mission includes joint surveillance and goodwill port calls in Tanzania, Mozambique, Mauritius, Seychelles, and the Maldives.

Strategic Goals: Aims to enhance maritime cooperation between India and African nations, focusing on security, trade, blue economy, and combating piracy in the IOR, and promoting regional stability and sustainable development.

Fruit Ripening Process: Ripening is a natural aging process in fruits involving changes in color, texture, flavor, sugar content, and acidity, driven by the hormone ethylene. Biochemical changes include increased respiration and ethylene production, cell wall loosening, starch conversion to sugars, chlorophyll reduction, pigment increase, and volatile oil emission.

Color Changes: Synthesis of carotenoids (yellow/red) and anthocyanins (red/blue) contribute to color change.

Texture Changes: Cell wall degradation leads to softening, influenced by enzymes like polygalacturonase and pectinesterase.

Sweetness Development: Enzymes like phosphorylase (bananas, apples) and amylase (mangoes) convert starch to sugars. Volatile compounds add to the sweet aroma.

Acidity: Organic acids (malic, citric, tartaric) contribute to fruit acidity.

Ripening Significance: Essential for embryo development and seed dispersal.

Banned Artificial Ripening Agent: Calcium Carbide releases toxic acetylene gas and may contain

Permitted Ripening Agents:

• Ethylene Gas: Approved by FSSAI (up to 100 ppm), triggers natural ripening, to be used in controlled chambers, without direct contact.
• Ethephon: Releases ethylene, used under regulated conditions.
• Ethereal: Ethylene-releasing compound used in controlled settings.