Tuesday, February 28, 2012

Vinnea the Vinegaroon


We are very sorry to say, our off-exhibit vinegaroon passed away this past weekend. Adrian found her Sunday morning. Typical of her easy to care for nature, she was up on top of the soil, so that we didn’t have to dig around for her.



Theoretically, an Animal Caretaker doesn’t have favorites, but likes all the animals equally. In reality, there are exceptions, and Vinnea was one of them. She was an industrious little arthropod who won our love by her methodical, even obsessive digging and tunneling. When she appeared to be gravid, we were like a whole team of aunts and uncles, rooting for her to give us little “mini-garoons” to dote on. And when it became clear that she was suffering from ill health, we all wanted to find the magic bullet that would help this mysterious little animal to get well.

Unfortunately, not much is known about vinegaroon husbandry. We are pretty good at keeping them alive and happy, but not so much with the big life transitions – reproduction, shedding, and death. I believe she had shed her final skin already when we got her, but I will always be sorry she didn’t get to have those babies, if there were any.


Vinnea spent her declining years in the home she excavated for herself, or making periodic visits to the surface to look for crickets and water. She never knew cold, predation, or drought. She had dark places to go, and lighted areas to give her a circadian rhythm. I believe we did whatever was possible to make her happy.


She will be missed.

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Saturday, February 25, 2012

Fresh Sheet – February 25, 2012


Four of the most beautiful Owl species in the tropics are now emerging in our garden window. Check out these butterflies as well as the 19 other kinds of pupae that we received this week.


Costa Rica

06 - Brassolis isthmia (Small-spotted Owl)
08 - Caligo atreus (Yellow-Edged Giant-Owl)
08 - Caligo eurilochus (Forest Giant Owl)
18 - Catonephele numilia (Numilia)
60 - Danaus plexippus (The Monarch)
32 - Dryas iulia (Julia Longwing)
40 - Dryadula phaetusa (Banded Orange Heliconian)
08 - Eryphanis polyxena (Purple Mort Bleu Owl)
04 - Eueides isabella (Isabella’s Longwing)
17 - Greta oto (Glasswing)
11 - Hamadryas laodamia (Starry Calico)
42 - Heliconius charitonius (Zebra Longwing)
37 - Heliconius cydno (Cydno Longwing)
11 - Heliconius doris (Doris Longwing)
47 - Heliconius hecale (Tiger Longwing)
28 - Heliconius ismenius (Ismenius Longwing)
06 - Heliconius melpomene (Postman)
33 - Hypna clytemnestra (Silver-studded Leafwing)
40 - Morpho peleides (Blue Morpho)
12 - Myselia cyaniris (Blue Wave Butterfly)
12 - Papilio anchisiades (Ruby-spotted Swallowtail)
12 - Papilio polyxenes (Black Swallowtail)
12 - Philaethria dido (Scarce Bamboo Page)

Total = 504

“Fresh Sheet” is our weekly shipment report of pupae on display in the emerging window. Visit Pacific Science Center’s Tropical Butterfly House and meet our newest residents.
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Sunday, February 19, 2012

Fresh Sheet – February 19, 2012


The trifecta of Archeoprepona demophon, Archeoprepona demophoon, and Prepona omphale pupae have arrived this week from two of our sources. Can you spot the differences?


Suriname

05 - Parides sesostris (Emerald-patched Cattleheart)
10 - Battus polydamas (Polydamus Swallowtail)
22 - Heraclides thoas (Thoas Swallowtail)
40 - Heraclides anchisiades (Ruby-spotted Swallowtail)
05 - Papilio androgeus (Androgeus Swallowtail)
07 - Heliconius erato (Small Postman)
10 - Heliconius melpomene (Postman)
12 - Dryas iulia (Julia Longwing)
10 - Catonephele orites (Orange-banded Shoemaker)
40 - Anartia amathea (Scarlet Peacock)
05 - Archeoprepona demophoon (Hubner’s Prepona)
14 - Biblis hyperia (Red Rim)
40 - Caligo memnon (Owl Butterfly)
20 - Mechanitis polymnia (Polymnia Tigerwing)
30 - Tithorea harmonia (Harmonia Tigerwing)

Total = 270

El Salvador

30 - Battus belus (Belus Swallowtail)
10 - Caligo memnon (Owl Butterfly)
16 - Catonephele numilia (Numilia)
12 - Consul fabius (Tiger Leafwing)
10 - Doxocopa laure (Silver Emperor)
20 - Heliconius hecale (Tiger Longwing)
20 - Heliconius hortense (Mountain Longwing)
30 - Lycorea cleobaea (Large Tiger)
80 - Morpho peleides (Blue Morpho)
10 - Morpho polyphemus (White Morpho)
30 - Myscelia ethusa (Royal Blue Butterfly)
25 - Parides photinus (Queen of Hearts)
30 - Archeoprepona demophon (One-spotted Prepona)
30 - Prepona omphale (Blue Belly-Button)

Total = 353

Grand Total = 623

“Fresh Sheet” is our weekly shipment report of pupae on display in the emerging window. Visit Pacific Science Center’s Tropical Butterfly House and meet our newest residents.


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Wednesday, February 15, 2012

Naked Mole-Rats – Year in Review


Once again, it is time to report the previous year’s statistics for our naked mole-rat colony. The meticulously kept data helps to inform us of any long-term health trends of which we should be aware in addition to giving us insight into the general growth and well being of the colony.


Here are the 2011 highlights:


Naked Mole-Rat Colony Population:
January 2011 – 41
January 2012 – 57

Deaths by year (adults and independent juveniles):
2008 – 9
2009 – 2
2010 – 1
2011 – 2

Pregnancies:
Total recorded pregnancies: 6
Total recorded births: 6
Total pups born: 120
Average litter size: 20
Total successful litters: 3
Total surviving offspring: 18
Pup survival rate: 15%


Weight Changes Jan 2011 to Feb 2012:
Average weight difference (not including individuals born this year): 3.2 grams
Average weight difference among adults 3 years and older (not including those born in 2009, 2010 or 2011): .06 grams
Average weight difference among juveniles born in 2009 or 2010: 5.6 grams
Average weight of pups born in 2011: 22.4 grams

2011 weight changes by size – groups are divided based on their size in Jan 2011


It was another year of growth for our colony. We welcomed 18 new pups into the colony. While the pups from all three new litters have been growing rapidly, the rest of the colony has maintained a steady weight. If you look at the above graph, you will notice a steady but slight increase across all weight categories, followed by a slight decline at the end of the year. This difference may be due to a new scale that replaced our previous instrument, which broke.


Record of Pregnancies
3/4 – “Galinda”
Pups born = 25
Survived = 0

3/13 – “Elphaba”
Pups born = 17
Survived = 0

5/27 – “Galinda”
Pups born = 20
Survived = 4
Note: Pups from these two recent litters were too small at the time of the tattooing of the colony. As yet, they have no identifying markers and are known as the “Big Babies.”

6/17 – “Elphaba”
Pups born = 17
Survived = 1

8/24 = “Galinda”
Pups born = 25
Survived = 13
Note: Not tattooed but noticeably younger than the “Big Babies,” they are known as the “Little Babies.”

12/19 – “Galinda”
Pups born = 16
Survived = 0

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