CRD 08-09 Table 5

CRD 08-09 Table 5. Western Gulf of Maine Management Area bycatch rate, observed hauls, observed landings (metric tons), and estimated bycatch for 1989-1993, and 1996-1997.
Year	Observed Harbor Porpoise Bycatch	Observed Landings	Observed Bycatch Rate	Total WGOM Landings	Estimated harbor porpoise bycatch
1989	4	51.020	0.078	8760.78	687
1990*	6	12.821	0.468*	6657.59	748*
1991	5	53.204	0.094	3847.70	362
1992	4	55.768	0.072	3742.49	268
1993	7	40.548	0.173	4256.50	735
1994	42	184.098	0.228	Unknown	Unknown
1995	11	118.776	0.093	Unknown	Unknown
1996	12	90.382	0.133	1762.57	234
1997	3	106.688	0.028	2038.64	57
Total	94	713.305
Average**			0.132	4438.04	585
* Due to a low number of observed hauls and an unrepresentative bycatch rate in 1990, an average annual bycatch rate from the remainder of the time series (1989, 1991-1997) (0.112) was used to estimate bycatch for 1990. ** The average bycatch rate is calculated as the total observed harbor porpoise bycatch (94) divided by total observed landings (713.305). This bycatch rate is then multiplied by the average annual total landings (4438.04) to calculate the average annual harbor porpoise bycatch. This approach provides the most robust estimate and allows for observed bycatch in 1990, 1994, and 1995 to be taken into account to estimate bycatch for the whole time series despite data issues that limit their applicability for estimating the annual bycatch for those particular years.

(Modified Jul. 22 2008)