Cooperative breeding in Neolamprologus bifasciatus, a cichlid fish inhabiting the deep reefs of Lake Tanganyika
Cooperative breeding in Neolamprologus bifasciatus, a cichlid fish inhabiting the deep reefs of Lake Tanganyika
复制标题
栖息在坦噶尼喀湖深礁的丽鱼科双带新双带鱼的合作繁殖
DOI：
10.1111/eff.12658
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发表时间：
2022
影响因子：
1.8
通讯作者：
Awata S
中科院分区：
文献类型：
--
作者：
Satoh S Saeki T;Kohda M;Awata S
合作繁殖是一种社会制度，在这种制度下，后代得到其他群体成员及其父母的照顾，发生在昆虫、鱼类、鸟类和哺乳动物身上。在这项研究中，我们报告了一个新的池鱼(Neolamprologus Biasciatus)合作繁殖的例子。这种物种是非洲坦噶尼喀湖特有的物种，生活在深度低于30米的岩石地区。使用水下摄像机对8个巢穴进行观察显示，繁殖对的巢中存在1至6个下属。它们与幼鸟和繁殖者共用庇护所，并从事孵化/领地防御和巢穴维护(清除巢中的沙子)，尽管频率比雌性繁殖者低。下属和雌性饲养员挖沙的频率随着群体中下属数量的增加而减少，这表明下属减少了饲养员的筑巢维护成本。雄性繁殖者很少表现出领土防御和巢维护。在其繁育群体中，从属个体对显性繁殖者和较大的从属个体表现出服从行为，表明群体成员之间存在显性等级。性腺检查发现，两性的下级都是性不成熟的，这表明他们可能不参与繁殖。水族馆的一项实验表明，幼鱼在它们出生的巢中成为从属，并参与领土防御。我们得出的结论是，它是一种合作繁殖者，其社会制度和从属角色类似于其他合作繁殖者所观察到的。
Cooperative breeding, a social system in which offspring receive care from other group members as well as their parents, occurs in insects, fish, birds and mammals. In this study, we report a new example of cooperative breeding in the cichlid fish (Neolamprologus bifasciatus). This species, endemic to Lake Tanganyika, Africa, inhabits rocky areas at depths below 30 m. Observations of eight nests using underwater video cameras showed that one to six subordinates were present in the nests of breeding pairs. The subordinates shared shelters with juveniles and breeders and engaged in brood/territorial defence and nest maintenance (removing sand from the nest), albeit at a lower frequency than female breeders. The frequency of sand digging by subordinates and female breeders decreased as the number of subordinates in the group increased, suggesting that subordinates reduce the costs of nest maintenance for breeders. The male breeders seldom showed territorial defence and nest maintenance. Subordinates exhibited submissive behaviours towards dominant breeders and larger subordinates within their breeding group, indicating a dominance hierarchy among group members. Gonad examination revealed that the subordinates of both sexes were sexually immature, suggesting that they may not participate in reproduction. An aquarium experiment showed that juveniles become subordinates in their natal nest and participate in territory defence. We conclude thatN.bifasciatusis a cooperative breeder, with social systems and subordinate roles similar to those observed in other cooperatively breeding cichlids.