Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
EL Karlström
1954
Bufo boreas x B. carinensis growth
Nov. 6 Attempt again at force-feeding 4 of the 9(?) metamorphosed toads in the terrarium. Heaviest of group chosen. Two are very emaciated and weak.
Sizes of those fed:
#1 B.L. = 10.1 mm {weak, no gular movements}
2 10.3
3 10.6 {healthier. Given little mash.}
4 [illegible] 9.9 {gular movements}
4|40.9
avg. 10.2 mm.
Hand liver grated into fine mash, mixed with cod liver oil. Injected through blunt hypodermic needle B-D #18 and 3 cc. syringe. Mash very fluid and easily forced out of syringe.
Nov. 7 #1 & 2 above found dead. 3&4 active - returned to terrarium. More storage product beetle added, and at least two toads took them. All four force-fed individuals had been kept separate in small (3x2") staring dish overnight, bottom of dish wet.
Tadpole nearly dead in aquarium. 3 had not reached metamorphosis by this date. None observed to feed on fresh liver mash placed in aquarium.
B.L. of tadpole 11.9 mm., T. = 17.7 mm. Hind limb stage, total length hind leg ? 7 mm. Large designated area with bloody spot on mid lateral right side.