how maintain elephant seals their fat

1.For elephant seals, it is hard work to stay fat

अपने फैट को कैसे मैंटेन करके रखती हैं ये ? 

कितनी बार खाती हैं  ? 

They feed 1,000 to 2,000 times daily

16/05/2021

 

For elephant seals – one of the most distinctive of the 33 species that comprise the world’s seal family – it is hard work to stay fat.

इनको जानिए 

• a large seal that breeds on the west coast of North America and the islands around Antarctica.

•  The male is much larger than the female and

•  has a very thick neck and an inflatable हवा भरी जा सके  snout नोज.

 study 

• feeding behaviour of northern elephant seals,

•  focusing on the females of the species during arduous दुष्कर  two-month post-breeding migrations in the northeastern Pacific Ocean.

कितनी मेहनत करती हैं

The seals were found to spend upwards of 20 hours every day – and sometimes a full 24 hours – in continuous deep-diving to feed on multitudes बड़ी संख्या of small fish, 

फैट के साथ ही साथ और कौनसी जरूरत है ? 

rather than के बजाय the larger prey favoured by other deep-diving marine mammals, to gain the body fat essential for successful reproduction

खाना के तलाश

and insulation in the frigid depths. They fed खाना 1,000 to 2,000 times daily.

“It is not easy to get fat,” 

कहाँ पर ट्रेकिंग की गई 

The researchers tracked 48 female elephant seals from Año Nuevo State Park in California, site of an important breeding colony. .

कब से लेकर कब तक का डाटा इस्तेमाल किया गया और कौन-कौन सी डिवाइस का यूज़ हुआ

They based their findings on data obtained from 2011 and 2018 using three small removable devices:

•  one attached under the jaw that counted the number of times they fed and measured their depth;

•  a satellite tracker attached atop the head that provided location information;

•  and a “smart” video camera with an infra-red LED light flash, 

• motion tracker and

•  another depth sensor, also atop the head.

मेल फीमेल की तुलना करना 

Male northern elephant seals 

• may reach 4 metres length and 

• weigh up to 2,000 kg.

• The males feed only in coastal waters.

Females are substantially smaller, getting

•  up to about 3 metres in length and

•  590 kg. 

Different solution

The female elephant seals, 

• also large

•  but not on the scale of a sperm whale, have devised a different solution - eating huge amounts of small fish. 

• But it is laborious to catch enough small fish to meet the energy needs of such a large animal.

“They continuously dive, यह कंटिन्यू गहराई में जाती है इससे रिलेटेड 

• for long periods of time – 20 minutes on average

•  and about 100 minutes at maximum – and deep, 

• 500 metres on average 

• and about 1,500 metres at maximum – 

• with only a few minutes breathing at the surface,” Adachi said.

माइग्रेशन के बारे में 

• “During the two-month migration, 

• they never come back to the land. 

• The sleeping hours in at-sea animals is not fully understood,” Adachi added

 Source : the hindu