That's great to hear John! I'm glad they reacted quick enough to escape the heron in the first place. Will their newfound fear of shadows moving over the pond make it challenging to remove them for the winter? Or do you use some sort of traps in the water? I can't imagine they'll sit still for repeated cast net attempts.
outdoor stock tanks...successes and failures
- Thread starter jjohnwm
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I've tried traps of several kinds, catch lots of the fry that way but never an adult. The same intelligence that I commented on earlier makes them too wary for traps. Even an umbrella net doesn't work very well, and my pond is way too small for a cast net. Some midnight dipnetting will be done likely with limited success, but sadly there will be a wet, miserable, likely cold and altogether unpleasant day coming soon when I will be forced to go into the pond after them. 
It's not my favourite part of goldfish keeping.
It's not my favourite part of goldfish keeping.
Shorter memories than what?
Only kidding, really happy to hear that some of them have survived albeit now in a mood to make bringing them back indoors more of a challenge.
Only kidding, really happy to hear that some of them have survived albeit now in a mood to make bringing them back indoors more of a challenge.
More like a cross-over; The Three Stooges meet Kramer from Seinfeld.
Saw another impressive example of goldfish intelligence yesterday, or at least that's how I interpreted it. I had just gotten a cold shower from the new motion-sensor sprinkler, by stepping off the deck to reach something. Stepped into the house for a dry shirt, got distracted by the phone, made a coffee, blah, blah, blah. I stepped to the window to look out at the pond, and sure enough, there was that long-nosed skinny sumbitch standing on the deck (outside of sensor sweep). It looked to me as though he might be able to stab down into the water from the deck if the goldies came too close, as they do for hand-outs.
I charged back to the door and into the yard, sending the would-be thief squawking and flying. I walked down to the pond-side deck and peered into the water.
Not a fish to be seen. The goldies had been gurgling and slurping at the surface when I had been there earlier, but the heron had sent them running. I didn't see one for the rest of the day. This morning, they were back to their normal obsequious selves, begging for food.
Okay, it doesn't exactly qualify them for Mensa membership, but it's difficult not to interpret their action as an indication that they can discern the difference between me and a heron...and further, that they understand the difference. Heron: bad. Me: good.
Pretty impressive, IMHO.
Nighttime temps are in the mid-positive-single digits Celsius lately. Stock tank temps so far have stayed in the mid-teens but today the daytime temp only got up to 13, so out of an abundance of caution I have begun moving the most sensitive fish indoors. What a PITA! l spent a couple hours slowly sifting the Jordanellas out of their tank; they shared it with Bristlenose Plecos who don't tolerate the cold as well as some of my other fish, so they were my first project. Catching the adults is merely inconvenient; finding and catching this year's fry, many of whom are barely a quarter-inch long, is sheer tedious torture.
It never ceases to amaze me to learn how cold the temperature can be for some of the species of fish that are sold as "tropical".
I spent the past couple days, mostly in cold rain, bringing my fish indoors from the stocktanks in the yard where they spent their summer. The past two mornings, the water temperature has been well below 50F, down to a low of 42F one morning, and the fish were fine. Green Swordtails become very quiescent at about 50F but bounce right back as the water warms; Gymnogeophagus rhabdotus and Cichlasoma dimerus have somewhat reduced appetites but are still very active and alert; Amecas, Jordanella flagfish, Corydoras paleatus (no, I'm not bothering to find the newest/latest/greatest name for them...deal with it!), Oryzias ricefish, Macropodus paradisefish, all "weathered the weather" without a hitch.
They all go into a 5-gallon bucket of water from the stocktank and brought into the basement fish room, which is currently around 62F. It takes only a few hours for the water to reach ambient temperatures, at which point the fish are transferred to their tanks. Makes me laugh when I read about people taking several days to alter the water temperature by a couple degrees.
I spent the past couple days, mostly in cold rain, bringing my fish indoors from the stocktanks in the yard where they spent their summer. The past two mornings, the water temperature has been well below 50F, down to a low of 42F one morning, and the fish were fine. Green Swordtails become very quiescent at about 50F but bounce right back as the water warms; Gymnogeophagus rhabdotus and Cichlasoma dimerus have somewhat reduced appetites but are still very active and alert; Amecas, Jordanella flagfish, Corydoras paleatus (no, I'm not bothering to find the newest/latest/greatest name for them...deal with it!), Oryzias ricefish, Macropodus paradisefish, all "weathered the weather" without a hitch.
They all go into a 5-gallon bucket of water from the stocktank and brought into the basement fish room, which is currently around 62F. It takes only a few hours for the water to reach ambient temperatures, at which point the fish are transferred to their tanks. Makes me laugh when I read about people taking several days to alter the water temperature by a couple degrees.
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