UNIT 22 

 MARINE MAMMALS OF THE ALASKA REGION 



'Nmin IS a conservative estimate of abundance used to estimate PBR and provides reasonable assurance that the stock size is equal to or greater than 

 the estimate 



-PBR (potential biological removal) is the maximum number of animals, not including natural mortalities, that may be removed from a stocV while allowing 

 that stock to reach or stay at its optimum sustainable population level (50-100% of its carrying capacity) 



^Annual human-caused mortality is an estimate of the total number of annual mortalities and serious injuries (likely to result in death) caused by humans 

 ■"Strategic status: Y = yes, N/A = information is not available, and N/D = estimated value has not been determined at this time 



^MMPA/ESA status E = listed as endangered and T - listed as threatened under the Endangered Species Act D = listed as depleted under the Marine 

 Mammal Protection Act 



^Trend increasing (I), stab!e(S), decreasing (D), or unknown (U) 

 T'hese species are under the jurisdiction of the U.S Fish and Wildlife Service, and are not included in the stock-status tables of the National Overview 



Table 22-1 



Status of marine mammal 

 stocks in the Alaska Region. 



231 



