Data and R script from: Females prioritize future over current offspring in wild seasonally breeding Assamese macaques

Classical work on birds by Lack was foundational to life history theory when it uncovered a trade-off between offspring quantity and quality. Evidence for a similar trade-off was later found in singleton-bearing mammals, but its extent and underlying mechanisms are not fully understood. Here, we explore the role of adaptive reproductive scheduling and maternal energy depletion as the basis of the trade-off with data on 410 births by 104 mothers recorded over 18 years in a wild Assamese macaque (Macaca assamensis) population with seasonal reproduction. In any given mating season and after controlling for maternal age effects, the probability for a female to conceive was strongly predicted by the presence of a dependent offspring. The younger the current infant was, the less likely mothers invested in a new reproductive event possibly to avoid stacked investment into nursing and unborn offspring. An inverse relationship between current infant survival and the conception of a new sibling p..., This dataset comprises demographic data collected from a wild population of Assamese macaques (Macaca assamensis) from 2006–2024. The dataset is presented in raw form with minimal processing. Binary variables (e.g., 1 for survival and 0 for death) have been coded directly based on observed events. Detailed descriptions of variables, dataset structure, and any additional processing steps are provided in the accompanying README file. , , # Data from: Females prioritize future over current offspring in wild seasonally breeding Assamese macaques

[https://doi.org/10.5061/dryad.cc2fqz6gt](https://doi.org/10.5061/dryad.cc2fqz6gt)

## Description of the data and file structure

This file provides an overview of the datasets and R code associated with the manuscript, \"Females prioritize future over current offspring in wild seasonally breeding Assamese macaques.\" The analysis is based on demographic data collected from a wild population of Assamese macaques (*Macaca assamensis*) from 2006–2024.

### **Datasets**

##### **File:** Data.zip

**File structure**: The datasets are provided in the \"**DATA**\" subfolder in '.csv' (Comma-Separated Values) format. Below are the included files:

#### **List of Files**

1\. data_age.csv

2\. data_infant.csv

3\. data_post.csv

4\. data_supp.csv

5\. data_syb.csv

### Files and variables

#### File: data\_age.csv

**Description:** Dataset to analyse the effect of age of previous offsprin...,