Potential influence of food abundance on spawning patterns in a damselfish, Abudefduf abdominalis
Potential influence of food abundance on spawning patterns in a damselfish, Abudefduf abdominalis
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食物丰度对雀鲷产卵模式的潜在影响
DOI：
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发表时间：
1995
影响因子：
1.5
通讯作者：
F. Stanton
中科院分区：
文献类型：
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作者：
W. A. Tyler;F. Stanton
珊瑚礁鱼类的时间产卵模式被认为受到多种环境因素的影响，包括对后代的捕食、海流和光照模式、群体筑巢和亲代照顾成本。尽管已知食物供应会限制某些早幼虫的生长和繁殖，但其对产卵模式的影响尚不清楚。在一项为期 5 年的研究中，夏威夷卡内奥赫湾的两个夏威夷军士阿布德夫杜夫腹部表现出不同的产卵模式，从产卵活动相对较低时与月球和半月周期同步的模式，到产卵活动较高时的非周期性产卵模式。研究期间流入卡内奥赫湾的溪流和产卵活动有所增加。两个研究珊瑚礁的繁殖活动与溪流流量呈正相关。初步喂养实验表明，卡内奥赫湾成年人的食物有限，并且食物供应可能会影响繁殖模式。这些结果表明，食物丰度的变化会影响种群水平的产卵模式，并可能部分解释在雀鲷中观察到的产卵模式的种内变异。
Temporal spawning patterns in coral-reef fishes are thought to be influenced by a variety of environmental factors including predation on offspring, current and light patterns, colonial nesting and costs of parental care. Although food availability is known to limit growth and reproduction in some pomacentrids, its effect on spawning patterns is not understood. Two populations of the Hawaiian sergeant, Abudefduf abdominalis, in Kaneohe Bay, Hawaii, exhibited variable spawning patterns over a 5-year study ranging from patterns synchronized with lunar and semi-lunar cycles when spawning activity was relatively low, to acyclic spawning patterns when spawning activity was high. Stream discharge into Kaneohe Bay and spawning activity increased over the study period. Reproductive activity was positively correlated with stream discharge on both study reefs. A preliminary feeding experiment suggests food of adults is limited in Kaneohe Bay and that food availability may influence reproductive patterns. These results suggest that variations in food abundance can affect population-level spawning patterns and may partly account for intraspecific variability in spawning patterns observed in damselfishes.