Hi Angus
No Amsterdam albie has ever been reported as killed in longline
fishing. Hardly surprising, given that there's only 30 pairs (which is
also the biggest population since it was describe in 1982). So the
chance of there being an observer on a boat when one is captured is
exceptionally small. Also, most observers would simply record it as a
Wandering Albatross, if anything. Some nice modeling work by gurus
Henri Weimerskirch and Geoff Tuck has shown that a recent surge in
Taiwanese longline effort for albacore overlaps very strongly with the
distribution (from satellite tracks) of the albies, and in fact the
models suggest that the increased effort can explain the recent
leveling-off of the population growth. Given the lag effects and
susceptibility of juveniles, we may be witnessing another decrease as
older birds are also occasionally caught or they senesce, and younger
and more vulnerable birds fail to recruit. Their model shows that just
6 accidental mortalities a year would be sufficient to drive a
decrease.
Cheers
Ross
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