Mammals collected by Dr. W. L. Abbott on Borneo and some of the small adjacent islands

Abstract

Before collecting on the mainland of Borneo, Dr. W. L. Abbott made two expeditions to adjacent islands, the mammalian fauna of which is closely allied to that of Borneo. One of these expeditions was to the Natuna Islands, north of Borneo, and was made during the spring and summer of 1900; the other was to the Karimata Islands, off the west coast, during August and September, 1904. Lists of the mammals obtained on these expeditions were published by Mr. Gerrit S. Miller, jr., in 1901 and in 1906. x More recently Doctor Abbott has visited the mainland of Borneo five times, on each occasion stopping at some of the adjacent islands. An account of the mammals collected on the first trip to the mainland, covering the Kapuas River region, was published by me in 1907. 2 The present paper aims to give an account of the mammals obtained on the remaining four expeditions-two to southwestern Borneo and two to southeastern Borneo-as well as those collected in the nearby islands. For the sake of completeness, I have included in the present paper the species collected in the Kapuas River region, as well as those from Karimata Islands, the latter having been visited a second time. Four short papers 3 have appeared recently which i

Brief communication: Weights of wild orang utans

“…The only accurate weights for wild orang utans appear to be those of Abbott, as reported by Lyon (1907Lyon ( , 1908Lyon ( , 1911. These were analysed by Eckhardt (19751, who pointed out that a failure to transform avoirdupois to metric in the case of the Bornean specimens had resulted in a spurious disparity in subsequent literature between reported weights of Bornean and Sumatran subspecies ofP.…”

“…According to Fooden and Izor (19831, the third molars erupt at about age 9 to 10 years; this being the traditional criterion of maturity, both Schultz (1941) and Eckhardt (1975) include as "adult" all specimens in which third molars are reported by Lyon (1908Lyon ( ,1911 to have the third molars at least visible in their alveoli. From Fooden and Izor's data (19831, however, it is clear that males continue to grow well into their teen years and females perhaps somewhat beyond 10 years of age.…”

Body mass of wild bornean orangutans living in human‐dominated landscapes: Implications for understanding their ecology and conservation

“…Upon reexamination we found small inconsistencies in Markham and Groves' (1990) reanalysis and presentation of these data. For example, they report excluding two of the five Bornean orangutan males presented in Lyon (1911) due to the fact that these males were not fully adult; however, in their final estimation of adult male body mass they report a sample size of n 5 4, not n 5 3. There are also some small discrepancies between the final means we calculated based on Lyon's (1911) data and those reported by Markham and Groves (1990).…”

“…Only means and ranges were presented in the most recent analysis performed by Markham and Groves (1990), so to obtain individual measurements we returned to the original data sources (Lyon, 1907(Lyon, , 1908(Lyon, , 1911. Upon reexamination we found small inconsistencies in Markham and Groves' (1990) reanalysis and presentation of these data.…”

“…Abbott, obtained from specimens collected during surveys and expeditions in 1907. These weights were first reported by Lyon (1907Lyon ( , 1908Lyon ( , 1911 and then reanalyzed by Eckhardt (1975). Markham and Groves (1990) re-examined the original specimens and determined that several individuals who were not fully adult had been included in the original sample.…”