tailieunhanh - Coastal Pollution: Effects on Living Resources and Humans - Chapter 11

Qua đời ở Biển Nguyên nhân Không rõ: Dolphin Tỷ lệ tử vong trên bờ biển Đại Tây Dương của Hoa Kỳ trong 1987-1988 Các buổi sáng sớm sương mù WS biến mất từ bãi biển ở Asbury Park, New Jersey, vào một ngày cuối mùa hè năm 1988, và vì nó làm tiêu tan nó Revealed ba cơ quan của động vật có vú biển cồng kềnh đó HAD nổi với thủy triều tRONG đêm. Họ Were bottlenose cá heo trưởng thành trẻ tuổi (Tursiopsis truncatus) - một loài cần chú ý cho những trò duyên dáng của họ. | 11 Mass Mortalities of Marine Mammals Died at Sea of Unknown Causes Dolphin Mortalities on the Atlantic Coast of United States in 1987-1988 The early morning mist was disappearing from the beach at Asbury Park New Jersey on a late summer day in 1988 and as it dissipated it revealed the bloated bodies of three sea mammals that had floated in with the tide during the night. They were young adult bottlenose dolphin Tursiopsis truncatus a species noted for their graceful antics at sea and for crowd-pleasing trained behavior in seaside commercial aquaria. But these specimens were unaccountably dead. They were also statistics because during the summers of 1987 and 1988 more than 700 other members of their species had washed up on Atlantic shores an unprecedented event. What killed these intelligent marine mammals Had they encountered fatal levels of some industrial chemical or some natural algal toxin Had a new viral disease reached epizootic levels in the population Or was some parasitic disease affecting equilibrium or respiration to the point where drowning could occur A task force of experts in marine diseases was assembled to examine the problem soon after the deaths began in 1987 headed by a professor imported temporarily from a Canadian veterinary college. The group established field headquarters in 1987 and 1988 in an oceanfront motel and pursued various hypotheses about causes as specimens were dissected and examined. News media representatives asked every day for answers and tourists gathered in subdued clusters around dead and decomposing animals on the beaches. After the various analyses pathological microbiological and chemical were completed a tentative and controversial diagnosis was made and a final report prepared. According to the report deaths during the outbreak period seemed associated with high body tissue levels of an algal toxin brevetoxin known as a red tide toxin ingested with food. Affected animals seemed less resistant to the microbial .