Coan, Jr. , Atilio L. and Wallace, Kenneth E. and Jackson , Alan R. (1992) Differences in Dolphin Mortality Rates in Night and Day Sets for the U.S. Eastern Tropical Pacific Tuna Purse Seine Fishery. Marine Fisheries Review, 54(2), pp. 7-14.
|PDF - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader |
Download (4Mb) | Preview
Because dolphins sometimes travel with yellowfin tuna, Thunnus albacares, in the eastern tropical Pacific (ETP), purse seiners use the dolphins to locate and capture tuna schools. During the process of setting the purse seine nets, dolphins often become entangled and drown before they can be released. Data for the U.S. purse seine fleet in the ETP during 1979-88 show that dolphin mortality rates in sets made during the night are higher than mortality rates in sets made during the day. Even with efforts to reduce nightset mortality rates through the use of high intensity floodlights, night set mortality rates remain higher. The data are also used to simulate a regulation on the fishery aimed at eliminating night sets and show that dolphin mortality rates would decrease.
|Title:||Differences in Dolphin Mortality Rates in Night and Day Sets for the U.S. Eastern Tropical Pacific Tuna Purse Seine Fishery|
|Journal or Publication Title:||Marine Fisheries Review|
|Page Range:||pp. 7-14|
|Issuing Agency:||United States National Marine Fisheries Service|
|Depositing User:||Patti M. Marraro|
|Date Deposited:||20 Aug 2012 14:37|
|Last Modified:||20 Aug 2012 14:37|
Actions (login required)