Yes, there are several ways.
First, Log in into your dashboard and select "Alerts" from the menu.
At the top under "Notification Methods" just uncheck the methods you don't want to receive alerts from.
On the Alerts page, you will see a list of all your alerts. Any alerts badged with "Active" will send alerts to your checked notification methods when a matching job is posted. You can click on these alerts and either click "Delete" to removed them or change the status form "Active" to "Inactive" to keep the alert but stop receiving notifications.