This is a short breeding update by my friend Kay the Guru on Odontolabis dalmanni intermedia. I think it is really interesting for several reasons. First of all, Japanese breeders are already quite advanced when it comes to substrates and more and more started looking into temperature effects when trying to achieve maximum size Lucanidae. I think there is a lot for us european breeders to learn in the trials and efforts. Who knows, maybe one day one of us will provide the world-record size specimen for the Be-Kuwa championship.
Here is Kay’s short breeding update:
I have just changed substrate for my Odontolabis dalmanni intermedia larvae. I have five of them being kept in a wine cooler at around 18 degrees Celsius. Two, kept singly in a 1.5-liter plastic bottle, are still L2, but the other three are already L3 and have grown well. The one (male) shown in the photo is the biggest among them, which is being kept singly in a 12-liter plastic container. I tried to scale him but my digital scale’s batteries had run out. It probably weighs 30-40 grams.
Here is their background: I bought a pair of wild-caught adults from Negros Is., Philippines at Mushi-sha, an insect shop in Tokyo, in June, 2012. I bred them in a 10-liter container and obtained about 50 larvae in September. First, I kept the larvae singly in a 120-milliliter plastic cup in a wine cooler at around 18 degrees Celsius for a month, and then I chose only five of them to rear myself and gave the rest to a friend of mine who has a large rearing facility. On October 31, 2012 I transferred them singly to a larger rearing container. Then, today I changed substrate. I will change substrate three months later.
A finding: I have kept one larva of Hexathrius mandibularis sumatranus in the same wine cooler. It hatched in August 2012 and is still L2. So, 18 degrees Celsius may be too cold for it to grow. I have no problem with Odontolabis dalmanni intermedia and the other beetle larvae, Lucanus maculifemoratus maculifemoratus, in the same cooler.