.University of California - Santa Barbara. As the Gangetic dolphin is at the top of the food chain, protecting the species and its habitat will ensure conservation of aquatic lives of the river. Definition of a Food Chain A friendly school of dolphins swim near your boat as you sail out for a day on vacation.

The breeding season of the Gangetic dolphin extends from January to June.

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Yet comparisons of the feeding ecology of the three focal dolphin species as gleaned from the chemistry suggested considerable overlap in the feeding ecology of all three species.This result was quite different from that of other research conducted by Young and her UCSB colleagues, which found different groups of marine predators in the Palmyra area finely partitioned where they hunted and what they ate in order to reduce competition and promote ecological coexistence.

The team's findings appear in the journal,"We used the principle of 'you are what you eat' to unlock some of the secrets of dolphin diet," said lead author Hillary Young, an assistant professor in UCSB's Department of Ecology, Evolution, and Marine Biology (EEMB). Some experts have reported that during the 19th century, dolphins were seen in the Yamuna up to as far as Delhi. Dolphins eat the fish and squid, and they also take crustacians and octopus. The types of fish and other creatures dolphins eat depend on the species of dolphin, where the dolphins live and the wildlife that shares their habitats. There are more than forty species of dolphin and they live in environments ranging from freshwater rivers, estuaries, and coastal waters to deep sea open oceans.