Auckland's best bowler was left-arm quick Mitchell McClenaghan, who took 4-90 off 21 overs, including Ryder's wicket.
In reply, Auckland openers Tim McIntosh and Lou Vincent survived one Mark Gillespie over before stumps without troubling the scorers.
At McLean Park in Napier, Central finished the first day of their match against Otago on 367-7, Carl Cochopa stealing the limelight with a measured 123 off 210 deliveries. The South African-born allrounder, batting at No 3, hit 18 boundaries in his innings which lasted for just over five hours.
Tarun Nethula was the other major contributor for Central, hitting 87 and remaining at the crease unbeaten alongside Adam Milne (38) at stumps.
Jacob Duffy was the best of the bowlers for Otago, taking 2-61 off 20 overs.