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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >Trade-offs between nutritional quality and abundance determine diet selection in juvenile benthic green turtles
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Trade-offs between nutritional quality and abundance determine diet selection in juvenile benthic green turtles

机译：营养质量与丰度之间的权衡决定少年底龟的饮食选择

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Herbivores consume foods that are often low in many essential nutrients and high in structural constituents difficult to digest. In this situation, nutritional quality is of paramount relevance for food selection. Neritic juvenile green turtles (Chelonia mydas Linnaeus 1758) in the western South Atlantic are plant-based omnivores relying primarily on red macroalgae, although brown macroalgae are highly available. We investigated the digestibility coefficient and calculated the intake passage time of the red macroalgae Pterocladiella capillacea, the brown macroalgae Sargassum cf. vulgare and the fish Cynoscion leiarchus for juvenile green turtles ranging 42.7-62.0 cm in curved carapace length to WA the hypothesis that macroalgae selection is based on nutritional quality. Results indicated that the apparent digestibility coefficient of Pterocladiella capilacea was similar to that of fish fillets (93.9% and 98.9% respectively) and significantly higher than that of the Sargassum cf. vulgare (75.8%), with a significant effect of body weight on the digestibility of certain macronutrients. Those differences arose partially because of the higher apparent digestibility of insoluble fiber of Pterocladiella capillacea compared to that of Sargassum cf. vulgare (95.2% and 84.0% respectively). The intake passage time, at 24.5 degrees C, was 20.6 +/- 3.8 days for the three diets. The overall evidence indicates that foraging on Pterocladiella capillacea is more profitable than foraging on Sargassum cf. vulgare, which may explain the prevalence of red algae in the diet of green turtles off Brazil. Furthermore, evidence indicates that red algae diets are similar to animal diets as far as digestibility is considered, although a higher daily intake is necessary to acquire the same energy intake, due to a lower energy density.
机译：食草动物消耗往往在许多必需营养素中的食物，并且在难以消化的结构组分中尤为困难。在这种情况下，营养质量是对食物选择的最重要的相关性。 Neritic少年绿色乌龟（Chelonia Mydas Linnaeus 1758）在西南大西洋中是植物的省食，主要依赖于红色大草原，尽管棕色大型古代高度可用。我们调查了消化系数，并计算了红马来科盖韦氏菌辣椒酱的进气通道时间，棕色大型野生果酱CF。 umengile绿色乌龟的耐腐细胞和鱼类毒素learchus在弯曲的甲状腺长度范围内为wa的假设，即大菌种选择基于营养质量。结果表明，Pterocladiella Capilacea的表观消化系数与鱼片（分别为93.9％和98.9％）的表观消化系数和显着高于Sargassum CF的那些耐瓜（75.8％），体重对某些Macronrients的消化率有显着影响。这些差异部分地出现，因为与Sargassum CF相比，Pterocladiella Capillacea的不溶性纤维的表观消化率较高。恒星（分别为95.2％和84.0％）。在24.5摄氏度，24.5摄氏度的摄入量时间为三种饮食的20.6 +/- 3.8天。总体证据表明，佩内拉菌的觅食比在Sargassum CF上觅食更有利可图。耐温公，可以解释巴西绿龟饮食中红藻的患病率。此外，只要考虑消化率，虽然所考虑的消化率，但由于较低的能量密度，即必须较高的日常摄入量，虽然需要较高的日常摄取是必要的，但是由于考虑了较高的日常摄取，但是由于能量密度较低。

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