By-catch distribution and standardized CPUE of sea turtles using data from the Japanese scientific observer program of the longline fishery in the Atlantic | Bycatch Management Information System (BMIS)

Source URL

https://www.iccat.int/en/pubs_CVSP.html

Citation

Minami H, Matsunaga H, Inoue Y, Ochi D (2013) By-catch distribution and standardized CPUE of sea turtles using data from the Japanese scientific observer program of the longline fishery in the Atlantic. ICCAT Collect Vol Sci Papers 69:1901–1909

Abstract

Bycatch distribution and standardized CPUE of sea turtles using data from Japanese scientific observer program of longline fishery in the Atlantic from 1997 to 2010 were examined. Leatherback and the other turtles were mainly caught in the northern area and in the eastern tropical area, though bycatch distribution changed by species and/or season. No turtle was caught in the area off South Africa during all season. Standardized CPUE for leatherback turtle and the other turtles (combined loggerhead and olive ridley turtles) caught by longline fishery in the Atlantic was preliminarily examined using Japanese observer data from 1997 to 2010 with Delta-lognormal model. Trends of increase or decrease of standardized CPUE were not observed from 1997 to 2010, though some fluctuations with ranges from 0.00017 to 0.00207 for leatherback and from 0 to 0.00030 for other turtles existed.