Bi-parental mucus provisioning in the scale-eating cichlid Perissodus microlepis (Cichlidae)
Bi-parental mucus provisioning in the scale-eating cichlid Perissodus microlepis (Cichlidae)
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食鳞慈鲷 Perissodus microlepis（丽鱼科）的双亲粘液供给
DOI：
10.1093/biolinnean/blz124
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发表时间：
2019
影响因子：
1.9
通讯作者：
M
中科院分区：
文献类型：
--
作者：
Satoh;S.;Awata;S.;Tanaka;H.;Jordan;L.A.;Kakuda;U.;Hori;M.;Kohda;M
尽管在很多硬骨鱼中都有父母的照顾，但出生后营养的提供很少被记录下来。在这里，我们描述了硬骨鱼中双亲照料的一个新例子，即坦噶尼喀湖特有的食鳞鱼PichlidPerissodus的粘液供应行为。野外观察显示，在父母的看护下，幼鸟经常向父母的身体表面瞥一眼。此外，对幼崽胃内容物的分析发现存在摄入的粘液，证实幼崽以父母的粘液分泌物为食。掠视行为的频率随着幼鱼的体长增加而增加，但随着幼体的进一步增长而下降。此外，当以浮游生物为食的频率较低时，幼鱼向父母瞥一眼的频率就会更高。水下笼子实验显示，与父母保持直接接触的幼崽比不允许直接接触的幼崽生长速度更快。我们的结论是，青少年P的扫视行为。小麻风是一种直接的父母营养形式，当食物丰度较低时，它会给幼崽带来生长发育的好处。
Although parental care is known to occur in a wide range of teleost fishes, postnatal provisioning of nutrition has been documented rarely. Here, we describe a novel example of bi-parental care in a teleost, i.e. mucus-provisioning behaviour in the scale-eating cichlidPerissodus microlepisendemic to Lake Tanganyika. Field observations revealed that young guarded by their parents frequently glanced towards the body surface of both parents. Furthermore, analyses of stomach contents of the young found the presence of ingested mucus, confirming that the young feed on the mucus secretions of their parents. The frequency of glancing behaviour increased with size of the young up to ~13 mm in standard length, but then declined with further growth. Additionally, the frequency of glancing of young towards their parents was higher when the frequency of foraging on plankton was lower. Underwater cage experiments revealed a higher rate of growth in the young kept in direct contact with their parents than in those not allowed direct contact. We conclude that glancing behaviour in youngP. microlepisis a form of direct parental nourishment that confers growth benefits to the young when food abundance is low.
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