Loughlln et al : Diving behavior of immature Eumetopias /ubalus 



573 



cant gender (P = 0.6) nor gender x age interaction effects 

 (P=0.19). 



Trip distance increased with age. For example, we cap- 

 tured a 9-nionth-old male sea lion (bearing transmitter 

 identification number PTT 21094, Table 1) near Kodiak 

 Island in March 200. It had short trip distances (<10 km) 

 which tended to concentrate near the capture site and 

 nearshore (Fig. 8). As the animal matured through April 

 and May, trip distance progressively increased until the sea 



lion was swimming over 50 km offshore beyond the 100- 

 m depth contour and had a maximtim dive depth >150 m 

 (Table 2; Fig. 8). 



Trip duration was measured for 10 of 25 animals with 

 SDRs containing time-line data (it was not possible to cal- 

 culate trip duration for 15 SDRs with the earlier SLTDRs 

 that did not transmit time-line data). Mean trip duration 

 for these 10 animals was 12.1 hours (n=544; SD=23.83 h; 

 range: 1—344 h; median=7.3 h). For animals slO months 



