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Biomedical subjects

J G Robinson

Publications and source records attributed to J G Robinson.

30 records · Page 2Linked to original sources
PubMed1983

Intergroup loud calls, range size, and spacing in Callicebus torquatus.

Observations are reported on the response of a free-ranging group of Callicebus torquatus to recordings of loud intergroup calls. When the recording consisted of the call of a solo adult male, the group fled from the recording. When the recording consisted of the adult male and female duetting together, the group remained in place and called back to the recording. These results contrast with previously described vocal and spatial responses of C. moloch and suggest that range size influences the mechanisms that regulate between-group spacing. The consequence of intergroup loud calls in C. moloch is to define and reinforce the location of boundaries, whereas in C. torquatus, homologous calls maintain spacing between groups.

Animals↗
PubMed1980

Estimating the approximate size of the illegal alien population in the United States by the comparative trend analysis of age-specific death rates.

This paper presents the results of an attempt to determine, through the use of demographic analysis, the approximate magnitude of the resident illegal alien population in the United States. The method described is the comparative analysis of trends in age-specific death rates in the United States and selected States, 1950 to 1975. The procedure depends on two assumptions: (a) that few or no illegal aliens are included in decennial census counts or current population estimates; and (b) that the reported statistics on deaths include deaths to all or nearly all illegal aliens. If the illegal alien population has increased by several million since 1970, then death rates in geographic areas where illegal aliens are most concentrated should show substantial excesses over the rates for the remainder of the country. A roughly similar downward trend in the death rates of all age groups since 1970 in all areas of the United States is apparent and hence does not support the view that many millions of illegal residents (perhaps over 6 million) are living here. However, the finding of a persistent deviation in the death rate trend for 10 selected States since 1960 for whites males, ages 20 to 44, and for no other group, suggests that the deaths of illegal aliens are being recorded in our vital statistics system. A range of estimates of the illegal alien population based on this analysis is presented and compared with the results of other studies.

Adolescent↗
PubMed1979

An analysis of the organization of vocal communication in the titi monkey Callicebus moloch.

Vocalizations of titi monkeys were recorded from 6 groups at two sites in the Ilanos of Colombia during 8 months of study. Frequency and temporal measurements from spectrograms of recordings, and differences in their patterns of use, were used to characterize call types. Animals repeat calls to form phrases, and combine phrases to form sequences. The six sequence types, defined by different transition probabilities between phrases, varied in proportion in different contexts. To examine the effect of order of phrases on response, I played back artificially constructed sequences to subject groups. I discuss hierarchical and sequential mechanisms as generators of vocal sequences, and draw comparisons with models of human language.

Animal Communication↗
PubMedDate not supplied

Isoflavone-rich or isoflavone-poor soy protein does not reduce menopausal symptoms during 24 weeks of treatment.

OBJECTIVE: We examined the change in menopausal symptoms in response to 24 weeks of isoflavone-rich (80.4 mg/day) and isoflavone-poor (4.4 mg/day) soy protein isolate treatment in perimenopausal women. DESIGN: In this double-blind 24-week study, 69 women were randomized to treatment: isoflavone-rich soy protein (n = 24), isoflavone-poor soy protein (n = 24), or whey protein control (n = 21). A Menopausal Index was used to assess change in hot flushes and night sweats, as well as other symptoms, at baseline, week 12, and week 24. RESULTS: Repeated measures analysis of variance indicated no treatment effect on change in hot flush (p = 0.18) and night sweat (p = 0.92) frequency, whereas there was a significant decline in hot flush (p = 0.0003) and night sweat (p = 0.0007) frequency with time in all treatment groups. Chi2 analyses indicated no treatment effect on severity of hot flushes or night sweats at any time point, as well as no treatment effect on frequency or severity of other vasomotor symptoms. At the completion of the study, we found no treatment effect on retrospective perception of frequency, duration, or severity of hot flushes or night sweats. Since time had a significant effect on symptoms with all groups reporting a decline in overall symptoms, this indicated either a placebo effect or simply an improvement in symptoms during the study. CONCLUSION: In this study, we found no evidence that isoflavone-rich or isoflavone-poor soy protein provided relief of vasomotor or of other menopausal symptoms.

Diet↗