Algae supply remains on a consistent and successful cycle. Due to the demands of new filter-feeders in the main aquarium, we have increased our Artemia production. Despite using the same daily volume, we are now hatching a total of 6g of cysts rather than 4g.
This month, the rotifers suffered a decline in numbers, partly due to due to a small hole in the filter mesh, and also down to new staff training (the delicate balance of washing and feeding caused a gradual loss with each wash). The mesh has been replaced, the training improved, and we are currently on a high-feed period to increase the population.
Zooplankton Survey Study
As part of our Zooplankton Survey, one of our apprentices collected a sample of plankton slick from the lagoon. Interestingly, the sample turned out to be the mid-larval stage of the brachyuran crab (Brachyuran megalopa), commonly seen around the island.
Jellyfish – Aurelia aurita
In June, we drained and thoroughly cleaned our display Kreisel cylinder. Several power outages stopped the water flow during the month, resulting in small deformities in the bell and tentacles of some of the jellies. All jellyfish in the Fish Lab continue to grow in the sump-based system, following our established protocols (30% water change every other day).
🦇 The MDC Goes Batty! 🦇
In addition to our marine conservation work, we have recently diversified into caring for two juvenile fruit bats. Both were found on the ground after falling from trees during the recent rainstorms. At around six weeks of age, they would be entirely dependent on their mothers for care, but after several hours they were not reclaimed from nearby bushes.
Both bats are doing well despite not having access to their mothers’ milk, and they successfully transitioned onto a diet of fruit a little earlier than normal. The young male has become very bold, exploring the surroundings and exercising his wings. The female is a few days behind in development. We aim to release them both once they can fly.