Cephalopods may be divided into five types according to their buoyancy. Members of several families such as the Octopodidae, Loliginidae and Ommastrephidae are negatively buoyant and must swim to stay in midwater and are therefore highly muscular animals. Others have mechanisms to make them neutrally buoyant so they can remain suspended in midwater without effort. Nautilus, Spirula and cuttlefishes have low pressure gas-filled chambers and their flesh is muscular and non-buoyant (Denton & Gilpin-Brown, 1973). Squids of one family, the Gonatidae, have a low density oil in their livers to give buoyancy but most of their body is muscular. Some oceanic octopods have very watery tissues in which lighter chloride ions replace sulphate ions (Denton & Shaw, 1961). In 12 of the 26 teuthoid families the buoyancy is provided by low-density ammonia-rich solution in their body and head tissues or in an expanded coelomic cavity (Clarke, Denton & Gilpin-Brown, 1979). These ammoniacal squids are extremely abundant in the oceans of the world and form a large part of the diet of birds, cetaceans, seals and fish (Clarke, 1977). When their biomass is estimated from their utilization by predators it is important to know their properties as food and, in particular, their calorific values. As pointed out by Croxall & Prince in a review of the calorific values of cephalopods (1982), all the known values are of muscular, negatively buoyant species because they are of value as food for humans but no measurements have been made on the ammoniacal or oily species which are probably as important, or even more important, in the economy of the ocean (Clarke, 1983).
MANILA – The House of Representatives and the Senate are set to conduct separate inquiry into the sudden spike in bogus accounts on social media platform Facebook.Muntinlupa Rep. Ruffy Biazon filed House Resolution 968 seeking to conduct an inquiry in aid of legislation into the proliferation of the clone Facebook accounts, which opens up its users to “a slew of exploitations” like online bullying, harassment, identity theft, violations of privacy and others.He said the government must create a joint task force composed of the Department of Information and Communications Technology, the National Bureau of Investigation, the Philippine National Police Anti-Cybercrime Group, the National Privacy Commission, and other related agencies to look on the matter.“The new normal would increase reliance in social media platforms…and it is therefore incumbent upon the government to ensure the safety of its users through the protection of their private data,” added Biazon, the senior vice chair of the House committee on national defense.Senator Francis “Kiko” Pangilinan, for his part, filed Senate Resolution No. 444, directing an appropriate Senate committee to conduct an inquiry into the proliferation of the fake profiles.Pangilinan said the inquiry will help determine the possible regulation of social media platforms “in accordance with the policy that respects the rights and freedoms of all Filipinos guaranteed by the Constitution.”“There is a need to look into our existing laws to increase the extent of liability and possible regulation of service providers or content hosts such as Facebook and other social media platforms,” Pangilinan said.Various universities around the country confirmed over the weekend that they received reports of fake and empty Facebook accounts bearing the names of their respective students and alumni.Among those who complained to have fraudulent Facebook account were those who opposed the Anti-Terrorism Bill, which is now up for President Rodrigo Duterte’s signature./PN
Here come the critics, demanding an overhaul of the NFL overtime system after Patrick Mahomes stood helpless on the sidelines Sunday evening as the New England Patriots drove for an overtime touchdown to beat the Kansas City Chiefs 37-31.And so it was that one of the participants in Super Bowl LIII in Atlanta was determined as if it were a game of chance.Except, of course, that it wasn’t a coin flip that decided the game. It was the Chiefs’ horrible defense that denied Mahomes and put the …
Priyanka ChopraIn Bollywood’s most ‘lethal’ Valentines Day celebration, actress Priyanka Chopra enumerated seven ways to lose one’s Valentine.”There are seven ways to lose your Valentine, in this box,” Priyanka said, after unveiling the press kit, which contained a rope, a syringe, a knife, a bottle of ‘poison’, a sachet of ‘potassium cyanide’, an ice pick and a strip of Vigora tablets, used for treating male erectile dysfunction.”This is a gift, which you, as a boyfriend, can give your girlfriend, if you want to,” the sultry actress, who had donned 12 different looks in ‘Whats Your Rashee’, said, at a promotional event for Vishal Bhardwaj’s 7 Khoon Maaf, at a suburban luxury hotel last night.7 Khoon Maaf is based on Ruskin Bond’s short story Susanna’s Seven Husbands and releases on Februray 18, 2011. Priyanka Chopra essays Susanna who slays seven of her husbands one by one, in her never-ending quest to find love.”This is such a romantic gift we have given you. Now, who does that,” Priyanka cooed, asking media persons not to open the box immediately.It was but natural that when the occasion was Valentines Day and it was Priyanka taking the queries, media was eager to know about her ‘friendship’ with co-actor Shahid Kapoor. Asked about Shahid , Priyanka, sporting a mischievous grin, quipped: “What about him?….my date is with you.”It was then left to Bhardwaj to ‘certify’ the relationship when he said Bollywood has seen many hit pairs like Raj Kapoor-Nargis, Amitabh Bachchan-Rekha and Shahid Kapoor-Priyanka Chopra. This sent Priyanka into peals of laughter.advertisement