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首页> 外文期刊>Polar biology >Nesting behavior of the icefish Chaenocephalus aceratus at Bouvetoya Island, Southern Ocean
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Nesting behavior of the icefish Chaenocephalus aceratus at Bouvetoya Island, Southern Ocean

机译：在南大洋的布韦托亚岛，冰鱼Chaenocephalus aceratus的筑巢行为

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摘要

We describe in situ observations on nesting by the Scotia Sea (or blackfin) icefish Chaenocephalus aceratus (Loennberg) that constitute the first substantive evidence of egg brooding and parental care by species of the family Channichthyidae. At Bouvetoya Island six fish, all apparently male, were observed guarding egg nests at depths of 141-148 m during an ROV deployment. Eggs were laid as aggregated, round masses (～20-25 cm diameter) in shallow, circular depressions (～1-m diameter, ～20-cm depth) that were probably excavated by the parent(s) to protect the nests. The fish guardians remained tenaciously in contact with the eggs despite disturbances caused by the ROV, reacting to this threat with stress and defense behaviors. Because brooding fishes are more susceptible to population impacts from trawl fisheries, we argue that this life history should be kept in mind in designing management schemes.
机译：我们描述了对由斯科舍海（或黑鳍）冰鱼Chaenocephalus aceratus（Loennberg）筑巢的原位观察，这构成了由潜蝇科（Channichthyidae）物种进行卵孵化和育儿的第一个实质性证据。在布韦托亚岛，在ROV部署过程中，观察到六只显然是雄性的鱼，在141-148 m的深度保护卵巢。将卵以聚集的圆形团块（直径约20-25厘米）放在浅的圆形凹陷处（直径约1米，深度约20厘米）放置，可能由父母挖掘以保护巢穴。尽管ROV造成了干扰，鱼类监护人仍与鸡蛋保持着顽强的接触，并通过压力和防御行为来应对这种威胁。由于育雏鱼类更容易受到拖网渔业对人口的影响，因此我们认为在设计管理方案时应牢记这一生活史。

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