Nurse Shark

25 posts • Page 2 of 3

Discuss all topics related to saltwater / reef tanks.


nicholas542
 
Posts: 384
Joined: Thu Sep 25, 2008 11:50 pm

by nicholas542

It all comes down to you shouldn't keep Sharks in captivity unless you're a Seaworld class aquarium, and you have a team of marine biologist monitoring them. I wish people would protest the selling and buying of sharks for home aquarists. They don't belong in you're home in a tiny glass container. Sharks roam a large area in the wild.


puffedupseagull
 
Posts: 623
Joined: Tue Mar 11, 2008 8:38 am

by puffedupseagull

The short-tail nurse shark, Pseudoginglymostoma brevicaudatum, is a nurse shark in the family Ginglymostomatidae, the only member of the genus Pseudoginglymostoma. It is found in the tropical western Indian Ocean between latitudes 0° S and 27° S, and reaches a length of 75 cm.
Entire body is dark brown. No conspicuous markings.
Compared to other "nurse sharks", it is very small, maximum size about 75 cm, average between 50 and 70 cm.
Feeds most likely on molluscs.
Similar to Tawny nurse shark , which however is of much larger size, its pectoral fins are falcate, and dorsal fins pointed.
The short-tail nurse shark is a little-known inshore bottom shark of the continental and insular shelves. It is well adapted to lie amongst coral reefs due to its tough skin. Its breeding and feeding habits are largely unknown, but it was assumed to be ovoviviparous. However, Artis has successfully bred 4 short-tail nurse sharks in 2007, which hatched from eggs laid by a shark from Sea Life Center Helsinki, showing the shark is oviparous. It survives for many hours out of water.


Not to be confused with grey nurse shark.
The nurse shark, Ginglymostoma cirratum, is a shark in the nurse sharks family, the only member of its genus Ginglymostoma. Nurse sharks can reach a length of 4.3 m (14 ft) and a weight of 330 lbs (150 kg).[2] Nurse sharks are so-called because their method of feeding on prey larger than their mouths is to bite down and slowly suck the prey's flesh down their throats.

The nurse shark family name, Ginglymostomatidae, derives from the Greek: from γίγγλυμος meaning hinge and στῶμα meaning mouth. Cirratum also derives from Greek, meaning curl.

he nurse shark is a common inshore bottom-dwelling shark, found in tropical and subtropical waters on the continental and insular shelves. It is frequently found at depths of one meter or less but may occur down to 12 m. Its common habitats are reefs, channels between mangrove islands and sand flats. It occurs in the Western Atlantic from Rhode Island down to southern Brazil; in the Eastern Atlantic from Cameroon to Gabon (and possibly ranges further north and south); in the Eastern Pacific from the southern Baja California to Peru; and around the islands of the Caribbean.

Nurse sharks are nocturnal animals, spending the day in large inactive groups of up to 40 individuals. Hidden under submerged ledges or in crevices within the reef, the nurse sharks seem to prefer specific resting sites and will return to them each day after the night's hunting. By night, the sharks are largely solitary; they spend most of their time rifling through the bottom sediments in search of food. Their diet consists primarily of crustaceans, molluscs, tunicates, sea snakes, and other fish, particularly stingrays.

Their diet consists of a large number of marine invertebrates - spiny lobsters, crabs, shrimp, sea urchins, octopuses, squid, and marine snails and bivalves.

They are thought to take advantage of dormant fish which would otherwise be too fast for the sharks to catch; although their small mouths limit the size of prey items, the sharks have large throat cavities which are used as a sort of bellows valve. In this way nurse sharks are able to suck in their prey. Nurse sharks are also known to graze algae and coral.

Nurse sharks have been observed resting on the bottom with their bodies supported on their fins, possibly providing a false shelter for crustaceans which they then ambush and eat

The mating season runs from late June to the end of July. Nurse sharks are ovoviviparous, meaning the eggs develop and hatch within the body of the female where the hatchlings develop further until live birth occurs. The gestation period is six months, with a typical litter of 21 - 28 pups The mating cycle is biennial, as it takes 18 months for the female's ovaries to produce another batch of eggs, during which time, cannibalistic behavior can occur. The young nurse sharks are born fully developed at about 30 cm long in Ginglymostoma cirratum. They possess a spotted coloration which fades with age.

The nurse shark is not widely commercially fished, but because of its sluggish behaviour it is an easy target for local fisheries. Its skin is exceptionally tough and is prized for leather; its flesh consumed fresh and salted and its liver utilised for oil. It is not taken as a game fish. It has been reported in some unprovoked attacks on humans but is not generally perceived as a threat


IS THAT ENOUGH CLUE FOR YOU????????????????????????????????????


dram5376799
 
Posts: 12
Joined: Sat Jul 26, 2008 5:07 pm

by dram5376799

That would be fine, thanks!


puffedupseagull
 
Posts: 623
Joined: Tue Mar 11, 2008 8:38 am

by puffedupseagull

cheers buddy
20371-santa.jpg


nicholas542
 
Posts: 384
Joined: Thu Sep 25, 2008 11:50 pm

by nicholas542

People just need to quite bothering sharks and leave them in the wild where they belong. There should be an all out ban on the sales of sharks for home entertainment. If you want to see sharks go to Seaworld or watch Shark Week on the Discovery Channel stop putting them in you livingroom fish tanks


jweb1369
 
Posts: 547
Joined: Thu Jul 10, 2008 2:55 am

by jweb1369

Unless you had a tank that wrapped around your living room. Haha. Now that would be awesome. Like one of those tunnels in seaworld. My mother is a marine biologist but for some reason she hasn't gotten into my fish tanks much...


nicholas542
 
Posts: 384
Joined: Thu Sep 25, 2008 11:50 pm

by nicholas542

my little sister is studying marine biology at Western University she has one more year to go. So alot of my questions go through her. Hopefully she will get her intership through Oregon State University, and dive/study marine life on the west coast there.


nicholas542
 
Posts: 384
Joined: Thu Sep 25, 2008 11:50 pm

by nicholas542

Me I am a grease monkey for life I finished 2 years in Auto Technology at Wenatchee Valley College, Two years of Auto Machining at Spokane Community College, and a Year of Transmission and drivetrain tech training at Spokane community.


jweb1369
 
Posts: 547
Joined: Thu Jul 10, 2008 2:55 am

by jweb1369

That is cool. My mom went to FSU. We used to own a dive charter business. I got certified when I was 11, and used to have to tell people what to do on the boat. It was pretty funny, having to tell these men, that were old enough to be my grandfather, what to do haha. I missed those days. That was the only good thing about my moms ex-husband. He pushed me to get certified and even though I met the requirements he told me he wouldn't certify me unless I completed the training HIS way. Which was like some serious damn navy seals bullshit haha. I had to fight him while diving, he would cut my tank off mid fiight, rip my mask off, knock out my regulator, disconnect my regulator from the tank, unstrap my bc and weight belt. I remember one time I had my bc in one hand and my other hand held tight to the weight belt so I wouldn't float up to the surface. I had to swim 2 laps in the pool and could stop once for a breath of air I took from the regulator, I had to do that nonstop 10 times! I remember I couldn't do it after numerous attempts and finally dissapointed myself so much I started crying. I was outside all night trying to do it. I eventually completed that part of the training. Good times... I think I will write a book about my life.


BurgerKing7704
 
Posts: 106
Joined: Mon Nov 24, 2008 9:03 pm

by BurgerKing7704

Maybe you could work something out with your local zoo, or place that keeps sharks. You could raise them then pass em on to marineland or whatever. I dont feel they should be kept in regular tanks, even as much as 500g, especially when fully grown.

Im pretty sure my LFS raises sharks then passes them onto someone with a bigger tank once they outgrow the one at their facility.

Nurse Shark

25 posts • Page 2 of 3

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