Operational sex ratios and behavioural sex differences in a pipefish population

1994 ◽  
Vol 34 (6) ◽  
pp. 142-435 ◽  
Author(s):  
Amanda Vincent ◽  
Ingrid Ahnesj� ◽  
Anders Berglund

1994 ◽  
Vol 34 (6) ◽  
pp. 435-442 ◽  
Author(s):  
Amanda Vincent ◽  
Ingrid Ahnesj� ◽  
Anders Berglund




2017 ◽  
Vol 7 (1) ◽  
Author(s):  
John G. Neuhoff


2021 ◽  
pp. 1-11
Author(s):  
Michel Garenne ◽  
Susan Thurstans ◽  
André Briend ◽  
Carmel Dolan ◽  
Tanya Khara ◽  
...  

Abstract The study investigates sex differences in the prevalence of undernutrition in sub-Saharan Africa. Undernutrition was defined by Z-scores using the CDC-2000 growth charts. Some 128 Demographic and Health Surveys (DHS) were analysed, totalling 700,114 children under-five. The results revealed a higher susceptibility of boys to undernutrition. Male-to-female ratios of prevalence averaged 1.18 for stunting (height-for-age Z-score <−2.0); 1.01 for wasting (weight-for-height Z-score <−2.0); 1.05 for underweight (weight-for-age Z-score <−2.0); and 1.29 for concurrent wasting and stunting (weight-for-height and height-for-age Z-scores <−2.0). Sex ratios of prevalence varied with age for stunting and concurrent wasting and stunting, with higher values for children age 0–23 months and lower values for children age 24–59 months. Sex ratios of prevalence tended to increase with declining level of mortality for stunting, underweight and concurrent wasting and stunting, but remained stable for wasting. Comparisons were made with other anthropometric reference sets (NCHS-1977 and WHO-2006), and the results were found to differ somewhat from those obtained with CDC-2000. Possible rationales for these patterns are discussed.



2021 ◽  
Author(s):  
Liza van Eijk ◽  
Dajiang Zhu ◽  
Baptiste Couvy-Duchesne ◽  
Lachlan T Strike ◽  
Anthony J Lee ◽  
...  

On average, men and women differ in brain structure and behaviour, raising the possibility of a link between sex differences in brain and behaviour. But women and men are also subject to different societal and cultural norms. We navigated this challenge by investigating variability of sex-differentiated brain structure within each sex. Using data from the Queensland Twin IMaging study (N=1,040) and Human Connectome Project (N=1,113), we obtained data-driven measures of individual differences along a male-female dimension for brain and behaviour based on average sex differences in brain structure and behaviour, respectively. We found a weak association between these brain and behavioural differences, driven by brain size. These brain and behavioural differences were moderately heritable. Our findings suggest that behavioural sex differences are to some extent related to sex differences in brain structure, but that this is mainly driven by differences in brain size, and causality should be interpreted cautiously.



2020 ◽  
Vol 4 (1) ◽  
pp. 44-53
Author(s):  
Sergio Ancona ◽  
András Liker ◽  
M. Cristina Carmona-Isunza ◽  
Tamás Székely


Primates ◽  
2000 ◽  
Vol 41 (1) ◽  
pp. 63-77 ◽  
Author(s):  
Gillian R. Brown ◽  
Alan F. Dixson




Neuroreport ◽  
1996 ◽  
Vol 7 (15) ◽  
pp. 2553-2558 ◽  
Author(s):  
Santiago Segovia ◽  
M. Cruz R. del Cerro ◽  
Esperanza Ortega ◽  
Carmen Pérez-Laso ◽  
Monica Rodriguez-Zafra ◽  
...  


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