Repeated evolution of cooperative breeding and life history traits in Tanganyikan cichlid fishes

Cooperative breeding is a complex social system in the animal kingdom where offspring receive care not only from their parents but also from other group members. However, the life history traits related to the evolutionary transition toward this complex system are still poorly understood. This study investigated the evolutionary transition from non-cooperativeto cooperative breeding in lamprologine cichlid fishes endemic to Lake Tanganyika using phylogenetic comparative methods. Ancestral state reconstruction revealed that the evolutionary transition from non-cooperative to cooperative breeding occurred at least seven times independently. Comparative analyses using life history data obtained from field observations and sampling and literature review showed an evolutionary link between cooperative breeding and clutch size or body size but not egg size; both clutch and body sizes were smaller in cooperative breeders. These findings suggested the evolutionary scenario that cooperative bree..., , # Repeated evolution of cooperative breeding and life history traits in Tanganyikan cichlid fishes

Dataset DOI: [10.5061/dryad.d51c5b0f9](10.5061/dryad.d51c5b0f9)

## Description of the data and file structure

### Files and variables

#### File: species_df.xlsx

**Description:** Averaged data on life history traits of target species.

#### File: sp.data.csv

Description: A dataset of life history traits for Tanganyika cichlids. This dataset includes field data obtained through this project and data obtained from FishBase.

##### Variables

* phylo: taxon name to for connecting to the phylogenetic tree
* BodyWeight_log_mean_female: meam log-transfer body weight of female breeders
* BodyWeight_log_mean_male: meam log-transfer body weight of male breeders
* EggSize_log_mean: mean log-transfer egg size
* ClutchSize_log_mean: mean log-transfer clutch size (number of eggs)
* habitat: breeding habitats of each species
* Species: scientific name
* cooperative_brooder: Whether the species en...,

合作育幼（cooperative breeding）是动物界中一类复杂的社会系统，子代不仅可获得双亲的抚育照料，还能得到群体内其他成员的帮助。然而，与向该复杂社会系统演化过渡相关的生活史特征，目前仍未得到充分阐释。本研究以坦噶尼喀湖特有隆头丽鱼亚科慈鲷为研究对象，采用系统发育比较方法（phylogenetic comparative methods），探讨了非合作育幼向合作育幼的演化过渡过程。祖先状态重建（ancestral state reconstruction）结果显示，非合作育幼向合作育幼的演化过渡至少独立发生了7次。通过整合野外观测、采样及文献综述获取的生活史数据开展比较分析，本研究发现合作育幼与窝卵数、体尺存在演化关联，但与卵粒大小无显著相关性；合作育幼物种的窝卵数与体尺均更小。本研究结果提示了合作育幼的演化路径……
# 坦噶尼喀湖慈鲷合作育幼与生活史特征的重复演化

数据集DOI：10.5061/dryad.d51c5b0f9

## 数据与文件结构说明

### 文件与变量
#### 文件：species_df.xlsx
**描述**：目标物种生活史特征的平均化数据集。

#### 文件：sp.data.csv
**描述**：坦噶尼喀湖慈鲷的生活史特征数据集，包含本研究项目获取的野外数据以及从FishBase获取的公开数据。

##### 变量说明：
* phylo：用于连接系统发育树的类群名称
* BodyWeight_log_mean_female：雌性亲体的对数转换平均体重
* BodyWeight_log_mean_male：雄性亲体的对数转换平均体重
* EggSize_log_mean：对数转换后的平均卵粒大小
* ClutchSize_log_mean：对数转换后的平均窝卵数（卵粒总数）
* habitat：各物种的繁殖生境
* Species：物种学名
* cooperative_brooder：该物种是否为合作育幼类群……