ARCADIA, Calif. (May 13, 2016)–Lightly raced Atascadero sat close to the pace throughout and fought off all challengers the final quarter mile en route to an impressive three quarter length win in Friday’s $58,000 allowance for California-bred or sired horses three and up. Ridden by Martin Garcia and trained by Jerry Hollendorfer, Atascadero, a 4-year-old gelding by Eskendereya, got 1 1/16 miles in 1:43.34.The 7-2 second choice in a field of eight, Atascadero paid $9.20, $4.40 and $3.20. Owned by his breeders, Al Graziani and Joe Russell, Atascadero, who was trying two turns for the first time in his fourth career start, improved his record to 4-2-1-1 and with the winner’s share of $34,800, increased his earnings to $82,720.Breaking from post position six, Atascadero sat second to longshot pacesetter Start a Runnin to the five sixteenths pole, took command and repelled a stubborn challenge from runner-up Matriculate while securing the victory.Ridden by Tyler Baze, Matriculate appeared to be in the garden spot turning for home, but had to settle for second, as he finished 1 ½ lengths in front of Ultimate Luck. Off at 5-1, Matriculate paid $4.80 and $3.80.Ultimate Luck, who was next to last turning for home, saved ground throughout and easily out-finished heavily favored Prime Issue for third by a length and a quarter. Ridden by Edwin Maldonado, Ultimate Luck was off at 8-1 and paid $3.60 to show.Fractions on the race were 23.17, 46 flat, 1:10.06 and 1:36.53.First post time for an 11-race card on Saturday at Santa Anita is at 2 p.m. Admission gates open at 11:30 a.m.
Linking extreme interannual changes in prey availability to foraging behaviour and breeding investment in a marine predator, the macaroni penguin
Understanding the mechanisms that link prey availability to predator behaviour and population change is central to projecting how a species may respond to future environmental pressures. We documented the behavioural responses and breeding investment of macaroni penguins Eudyptes chrysolophus across five breeding seasons where local prey density changed by five-fold; from very low to highly abundant. When prey availability was low, foraging trips were significantly longer and extended overnight. Birds also foraged farther from the colony, potentially in order to reach more distant foraging grounds and allow for increased search times. These extended foraging trips were also linked to a marked decrease in fledgling weights, most likely associated with reduced rates of provisioning. Furthermore, by comparing our results with previous work on this population, it appears that lowered first-year survival rates associated, at least partially, with fledging masses were also evident for this cohort. This study integrates a unique set of prey density, predator behaviour and predator breeding investment data to highlight a possible behavioural mechanism linking perturbations in prey availability to population demography.