Morphometric variations associated with breeding season in obtuse barracuda, Sphyraena obtusata Cuvier, 1829 observed from the commercial fish landings at Vizhinjam, Kerala, India

Marine biology,marine ecology,Phytoplankton, marine algae, zooplankton, nekton, benthos, corals and coral reefs, ecology, zoogeography systematics, primary production experimental work on ecosystem including energy flow at different trophic levels, population dynamics theoretical models, recycling of matter, influence environmental factors metabolic activity, microbiology, mariculture propagation cultivable species, biology fishes, reptiles, sea birds mammals, physical, chemical, geological meteorological features the environments related to biology, damage caused by pollution engineering works, underwater observations, conservation living resources, modifications in methodology techniques development new apparatus sciences