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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Allometric relationships in feeding and digestion in the Chilean mytilids Mytilus chilensis (Hupe), Choromytilus chorus (Molina) and Aulacomya ater (Molina):A comparative study
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Allometric relationships in feeding and digestion in the Chilean mytilids Mytilus chilensis (Hupe), Choromytilus chorus (Molina) and Aulacomya ater (Molina):A comparative study

机译：智利Mytilus chilensis（Hupe），Chromytilus chorus（Molina）和Aulacomya ater（Molina）进食和消化中的异速生长关系：比较研究

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摘要

As a first attempt to explain the functional basis of the co-occurrence of three sympatric species of native mussels frequently found at the cold-temperate coasts of Chile, we tested the existence of potential morpho-functional differences operating at the feeding and digestive levels of Mytilus chilensis, Choromytilus chorus and Aulacomya ater. Clearance rate (CR (1 h~(-1))), gill area (GA: mm~2), dry weight of labial palps (W_(LP): mg), gut contents (GC: mg), weight of digestive gland (W_(DG): mg), specific (mg of maltose or tyrosine mg prot~(-1)h~(-1)) and total (mg of maltose or tyrosine digestive gland~(-1)h~(-1)) amylase, cellulase, laminarinase, xylanase and pro-tease activities were measured in different size individuals of the three species collected from Corral Bay (Chile). Hydrolytic activity of digestive extracts towards natural substrates elaborated from different macrophyte was also tested for the 3 species. No significant differences between species were found for mass-exponents (b) scal-ing CR (b = 0.744) and GA (b=0.803). However, size-specific CR and GA were found to vary between species, ranking as follows: M. chilensis>C. chorus>A ater. W_(LP) fitted to an inter-specific common function (b=0.77). Regarding digestive parameters, no significant inter-specific differences were found between mass-exponents for GC (b=0.434), W_(DG) (b = 1.067) and total enzyme activities (common b ranged from 0.904 to 1.212), except total amylase which was significantly higher in A ater (b = 1.838). Specific activities of digestive enzymes were size-independent except A ater amylase, which increased with body-size, and protease in the three species which decreased with size. For a common body-size, GC and carbohydrase activities were significantly higher in M. chilensis than in C chorus and A ater. Inter-specific differences were found in the composition of carbohy-drase pool: amylase was the prevalent enzyme in M. chilensis (up to 44.5% of total carbohydrase) whereas the three carbohydrases had a similar contribution in C. chorus and A ater. Sugar release from vascular plants was significantly higher in C. chorus.
机译：作为解释智利冷温海岸经常发现的三种同伴贻贝同胞物种共现的功能基础的首次尝试，我们测试了在智利的摄食和消化水平下存在潜在的形态功能差异智利的Mytilus chilensis，Chromytilus chorus和Aulacomya ater。清除率（CR（1 h〜（-1））），ill面积（GA：mm〜2），唇掌干重（W_（LP）：mg），肠内容物（GC：mg），消化重量腺体（W_（DG）：毫克），特异性（麦芽糖或酪氨酸毫克mg prot〜（-1）h〜（-1））和总量（麦芽糖或酪氨酸消化腺〜（-1）h〜（- 1））在从科拉尔湾（智利）收集的三个物种的不同大小的个体中测量了淀粉酶，纤维素酶，laminarinase，木聚糖酶和蛋白酶活性。还测试了3种物种的消化提取物对由不同大型植物精制的天然底物的水解活性。在质量指数（b）缩放比例系数CR（b = 0.744）和GA（b = 0.803）的物种之间没有发现显着差异。但是，发现大小特异性的CR和GA在物种之间有所不同，排名如下：M. chilensis> C。合唱>阿特。 W_（LP）拟合到种间通用函数（b = 0.77）。关于消化参数，除总淀粉酶外，GC的质量指数（b = 0.434），W_（DG）（b = 1.067）和总酶活性（共同b的范围为0.904至1.212）之间没有发现明显的种间差异。这在A ater中显着更高（b = 1.838）。消化酶的比活性与大小无关，除了阿特淀粉酶随体型增加而增加外，其余三种蛋白酶随大小而减小。对于普通的体型，智利分枝杆菌的GC和糖酶活性显着高于C合唱和A ater。种间差异在糖度库的组成中发现：淀粉酶是智利支原体中的普遍酶（占总糖化酶的44.5％），而三种糖酶在C. chorus和A. ater中具有相似的作用。维管束中维管束植物中的糖释放明显更高。

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    Irrintzi Ibarrola; Udane Arambalza; Jorge M. Navarro; Miren Bego Urrutia; Enrique Navarro;

  • 作者单位

    Departamento GAFFA (Fisiologia Animal), Facultad de Ciencia y Tecnologia, Universidad del Pals Vasco/ Euskal Herriko Unibertsitatea, Apartado 644,48080 Bilbao, Spain;

    Departamento GAFFA (Fisiologia Animal), Facultad de Ciencia y Tecnologia, Universidad del Pals Vasco/ Euskal Herriko Unibertsitatea, Apartado 644,48080 Bilbao, Spain;

    Institute de Ciencias Marinas y Limnologicas, Universidad Austral de Chile, casitta 567, Valdivia, Chile;

    Departamento GAFFA (Fisiologia Animal), Facultad de Ciencia y Tecnologia, Universidad del Pals Vasco/ Euskal Herriko Unibertsitatea, Apartado 644,48080 Bilbao, Spain;

    Departamento GAFFA (Fisiologia Animal), Facultad de Ciencia y Tecnologia, Universidad del Pals Vasco/ Euskal Herriko Unibertsitatea, Apartado 644,48080 Bilbao, Spain;

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  • 正文语种 eng
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  • 关键词

    body-size; clearance rate; digestive enzymes; gill area; gut content; mussels;

    机译：身体尺寸;清除率;消化酶;ill区肠内容物;青口贝;

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