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首页> 外文期刊>Marine ecology >Food preferences and rhythms of feeding activity of two co-existing demersal fish, the longspine snipefish, Macroramphosus scolopax (Linnaeus, 1758), and the boarfish Capros aper (Linnaeus, 1758), on the Mediterranean deep shelf
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Food preferences and rhythms of feeding activity of two co-existing demersal fish, the longspine snipefish, Macroramphosus scolopax (Linnaeus, 1758), and the boarfish Capros aper (Linnaeus, 1758), on the Mediterranean deep shelf

机译：在地中海深海地区，两种并存的深海鱼，长脊sn鱼，Macramopphos scolopax（Linnaeus，1758）和公鱼Capros aper（Linnaeus，1758）的食物偏爱和进食节奏。

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摘要

The feeding behaviour of two potentially competing species, the longspine snipefish, Macroramphosus scolopax, and the boarfish Capros aper was examined. While both species are very abundant along the Mediterranean coast and are regularly caught by demersal trawlers, they are of no commercial value. The diets of boarfish and longspine snipefish were investigated from samples collected between January 2001 and May 2002. Variations in the diet with fish size and season, as well as diet overlap and diversity were explored. Mysid shrimps, amphipods and gastropods were the most important food items in the diet of longspine snipefish. During ontogenetic development, M.scolopax occupies different trophic levels: the diet shifts from being predominantly composed of mysids (Anchialina agilis, Lophogaster typicus, Erythrops sp., Leptomysis spp.) in the smaller longspine snipefish [<6.5cm total length (TL)] towards decapods (Anapagurus laevis) and amphipods (Leucothoe incisa, Eusirus longipes, Hyperidea) in the larger individuals (>6.5cm TL). Crustacean decapods and copepods were the most important prey in the stomachs of boarfish. Mysids (Lo.typicus), euphausiids and nematodes were present in the larger individuals (>8cm TL). A more generalist diet, still containing copepods, crustacean decapods, gastropods (Limacina retroversa) and a large variety of amphipods (e.g. Phtysica marina, Stenotoe bosphorana) and mysids (e.g. A.agilis, Leptomysis spp., Erythrops sp.), dominated the diet of C.aper between 2 and 8cm TL. Diet overlap between longspine snipefish and boarfish was very low and the differences in stomach species diversity were explained by season and fish size.
机译：检查了两种可能竞争的物种，即长脊sn sn鱼，Macromamphosus scolopax和鱼Capros aper的摄食行为。虽然这两个物种在地中海沿岸都很丰富，并且经常被海底拖网捕捞，但它们没有商业价值。从2001年1月至2002年5月收集的样本中调查了公猪和长脊sn sn鱼的饮食。研究了饮食随鱼的大小和季节的变化以及饮食的重叠和多样性。在长脊sn鱼的饮食中，Mysid虾，两栖动物和腹足动物是最重要的食物。在个体发育过程中，M。scolopax处于不同的营养水平：在较小的长脊sn鱼[<6.5cm总长度（TL）]中，饮食从主要由肉豆蔻组成（Anchialina agilis，Lophogaster typicus，Erythrops sp。，Leptomysis spp。）转变。 ]移向较大个体（> 6.5cm TL）的十足纲（Anapagurus laevis）和两栖纲（Leucothoe incisa，Eusirus longipes，Hyperidea）。甲壳纲十足纲和co足纲是公鱼胃中最​​重要的猎物。较大的个体（> 8cm TL）中存在类蝇（Lo.typicus），上腹部和线虫。仍以co足类，甲壳纲十足纲，腹足纲（Limacina retroversa）和各种两栖纲（例如，Phtysica marina，Stenotoe bosphorana）和mysids（例如，A.agilis，Leptomysis spp。，Erythrops sp。）为主的更为通用的饮食。在2至8厘米TL之间进食C.aper。长脊sn鱼和公猪之间的饮食重叠很低，并且通过季节和鱼的大小来解释胃物种多样性的差异。

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