Gray whales

MARINE MAMMALS Gray whale, Eschrichtius robustus stranded along North American west coast 1988-91 ... 

Varanasi, U., J.E. Stein, K.L. Tilbury, J.P. Mador, C.A. Sloan, R.C. Clark, and S.L. Chan. 1994. Chemical contaminants in gray whales (Eschrichtius robustus) stranded along the west coast of North America. Sci. Total Environ. 145 29-53. 

Was this youT answeT Sharks feed on fish and marine mammals, which makes them secondary, tertiary, or quaternary consumers. Phytoplanktonfeeding gray whales, however, are primary consumers. When an orca feeds on a shark, it is eating at a higher trophic level than when it feeds on a gray... 

There are 11 species of baleen whale, which are divided into three groups gray whales, right whales, and rorqual whales. Right whales were so called because hunters liked them best. They are big, slow swimmers with big baleen plates, and they float when dead. They were the right ones to kill. 

West (12) has reviewed some of the evidences of the world-wide distribution of pesticides. Blubber from a gray whale washed up on the California shore, she reported, contained 0.2 p.p.m. of DDT, 0.5 p.p.m. of DDE, and 0.2 p.p.m. of lindane. Moreover, DDT has been found in the oil of fish caught off the coast of the Americas, Europe, and Asia in concentrations ranging from 1 to 300 p.p.m. Residues of DDT have been found in duck eggs on the Yukon River, in 75% of 2300 species of birds collected from 22 states and three provinces of Canada, and in 31 of 32 eagles examined. 

Gray whales Blue whales Sea otters Sea lions... 

A modern gray whale s blowhole allows it to break the surface, inhale, and resubmerge without having to stop or tilt the snout up. 

Eschrichtius robustus Gray whale Muscle Gulf of Caltfomia, Mexico 0.145 Ruelas-lnzunza et al. 

Ruelas-Inzunza J, Horvat M, Pdrez-Cortds H, Paez-Osuna F (2003a) Methylmercury and total mercury distribution in tissues of gray whales Eschrichtius robustus) and spinner dolphins (Stenella longirostris) stranded along the lower Gulf of CaUfomia, Mexico. Cienc Meu-29(l) l-8... 

Figure 27.8 shows that as evolutionary lines diverge, the number of sequence variations increases so that closely related species have few differences and distantly related species have many difference in primary structure. Thus, human and chimpanzees have identical cyctochrome c sequences. The primary structures of cytochrome c molecules from California gray whales differ from that of pigs, cows, and sheeps by only two residues. We conclude that the whale has evolved from land animals related to modern hoofed animals. Gray whale cytochrome c differs from human cytochrome c 10 residues. 

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