sexes. Dimorphism means two forms. “Sexual dimorphism” is two sexes of a species differ in external appearance or other features. Males and females may differ in size‚ color‚ shape‚ the development of appendages (such as horns‚ teeth‚ feathers‚ or fins)‚ and also in scent or sound production. Species in which male and females are identical in appearance or other features are said to be “monomorphic.” There are different types of dimorphic traits found in marine mammals and explains some of the reasons
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one of the most abundant demersal shark species. This shark is gray or brownish on top and pale gray or white on its ventral side with irregular white spots on the top or sides of the body. The second dorsal fin is smaller than the first and both fins have spines at their origin. The caudal fin is asymmetrical with the upper lobe being larger. The smooth edged short and oblique teeth are similar in both the upper and lower jaw.” Habitat: They prefer to have temperatures from 45 to 55 degrees Fahrenheit
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part of the video concentrated on whales and their ancestors. Whales and dolphin origin is a mystery. They are the few animals that have large complicated brains. Phil Gingerich‚ a geologist from Michigan University‚ went to Pakistan and found the back of a skull that resembled a wolf skull‚ but something was wrong. There was a walnut sized bump inside the skull. Part of the inner ear had a distinctive shape..only found in whales. This formed the question‚ "did whales come from land mammals?" He needed
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common called minnows or craps family. The minnow’s family has about 3032 species and 371 genera. Some of the key characteristics to define this family are toothless jaws‚ teeth in throat only‚ cycloid scales‚ single soft-rayed dorsal fin and a pair of abdominal pelvic fins. They also have large eye‚ scaleless head and body with conspicuous scales. The mouth is usually small and pointing forwards or downwards. Minnow’s family is diverse family includes goldfish‚ shiners‚ and carps. It ranges from small
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is also white‚ though both sides of the fluke are black. The two white patches that make up the hourglass shape are often connected by points or at least a thin white line‚ though in some individuals the two white patches do not touch. The dorsal fin is easily notable and concave‚ though in some individuals it becomes sharply hooked backwards. Pectoral flippers may also have a definite "elbow" and curve back sharply on their leading edge. Diet & Behaviour: Stomach contents of stranded hourglass
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manta ray can grow to a size of 7m (23ft) and weigh up to 3‚600 pounds. It has 18 rows of teeth on their lower jaw. Their eyes are on the side of their head and they have a long whip-like tail. They have very long flattened and triangular pectoral fins on both sides of its body. A manta’s cephalic lobe is short‚ stubby and round. A devil ray can grow up to 5.2m (17ft) and weigh
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documentary Blackfish shows an incident that procured on November 3‚ 1987 of one of the experienced trainers getting crushed between two whales. Luckily this trainer survived along with another 70 others on documented reports from whales injuring humans throughout the years that SeaWorld has been operating. Yet‚ others have not been so fortunate‚ in the past years one whale in particular‚ Tilikum‚ has taken the lives of 3 people in the 30 plus years he has been held in captivity. One trainer who was very
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result‚ animals can be damaged mentally and physically. Some animals who do not attack humans in the wild may start attacking humans in captivity. One example of this are killer whales. As said before‚ killer whales do not harm humans in the wild‚ but they do harm them in captivity. The reason for this is because the “whales are basically driven mad by their confined circumstances”
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FIN 334 (Investments) Syllabus Instructor Course Overview Travis Box The purpose of this course is to provide you with an understanding of the fundamentals of investments. Such an understanding is crucial to anyone who wishes to pursue a career in finance and/or participate in financial markets. Included are topics such as security types‚ the buying and selling of securities‚ mutual funds‚ market efficiency‚ common stocks and their valuation‚ diversification‚ the CAPM‚ performance
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wild is about 1 to 5 years and they range from size 0.6 in to 14 in. Seahorses are very slow‚ they have a top speed of about 5 feet per hour (3). Seahorses are found in shallow areas‚ near the coral reefs‚ seagrass beds etc. They swim by using small fins on their back and behind their heads. Seahorses are the only species on earth where the male gives birth (3). Although‚ they don’t physically look like a fish they share some characteristics with them. These characteristics can be found in the following
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