a tumblelog
Fri 13 Nov 2020

Anchor Points for Webbing

In the early evening I commented on a terrarium video posted on Facebook that if I was the owner of the terrarium I would provide more higher anchor points to the Chromatopelma cyaneopubescens shown webbing around. I keep this species in a plastic container with quite some height as I understand that this species can be found several feet above the ground:

Chromatopelma cyaneopubescens live in extreme xeric conditions in sandy thorn tree/cactus forests on the Paraguana Peninsula of Venezuela. This species is an "opportunistic burrower", whereby, they will make their silken retreats in the dried fissures of the ground, in old dried and piled up cacti, at the base of large thorny trees or up in the natural cavities of those thorny acacia tree ... basically, wherever the prey availability forces them to make their retreat. The trees are rarely higher than 12 feet and either cracks in the tree or natural tree cavities are never above 6 feet.

There are MANY theraphosid taxa that live high in trees that are not true arboreals AND there are true arboreals that have been found living in fossorial ground burrows or under fallen logs lying on the ground.

Source: Chromatopelma cyaneopubescens-- Arboreal vs Terrestrial.

Chromatopelma cyaneopubescens webbing using various anchor points
Chromatopelma cyaneopubescens webbing using various anchor points.
Chromatopelma cyaneopubescens webbing using various anchor points
Chromatopelma cyaneopubescens webbing using various anchor points.

So I keep this species without a water dish on dry coco peat with only a small part kept moist. I also place a drop of water on the web near the spider now and then. On the 8th of April, 2020 I could take photos of this specimen taking moisture from the substrate.

M1 Memory and Performance

The M1 Macs are out now, and not only does Apple claim they're absolutely smokin', early benchmarks seem to confirm those claims. I don't find this surprising, Apple has been highly focused on performance ever since Tiger, and as far as I can tell hasn't let up since.

One maybe somewhat surprising aspect of the M1s is the limitation to "only" 16 Gigabytes of memory. As someone who bought a 16 Kilobyte language card to run the Merlin 6502 assembler on his Apple ][+ and expanded his NeXT cube, which isn't that different from a modern Mac, to a whopping 16 Megabytes, this doesn't actually seem that much of a limitation, but it did cause a bit of consternation.

Source: M1 Memory and Performance, an article by Marcel Weiher.

Introduction to Go Modules

I’ve seen many people online talk about liking Go and using it, but being confused by its dependency system, called Go modules. This blog post aims to provide a simple introduction with examples. It focuses mostly on Unix-based systems like Linux and macOS over Windows.

This post does not cover all possible ways of using Go modules. It’s just a simple introduction with the most common use cases.

Source: Introduction to Go Modules.