Flexibility in food resource allocation in parents and selectivity for offspring: variations in delta N-15 and delta C-13 values during breeding of the blue-footed booby

Gonzalez-Medina Erick; Alfredo Castillo-Guerrero Jose; Herzka Sharon Z.; Fernandez Guillermo

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Flexibility in food resource allocation in parents and selectivity for offspring: variations in delta N-15 and delta C-13 values during breeding of the blue-footed booby

机译：父母中食物资源分配的灵活性和对后代的选择性：蓝脚鱼繁殖期间N-15和C-13值的变化

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It is common for marine animals to be selective in the amount and quality of foods during reproduction due to the higher energetic demands. As central place foragers, seabirds are often selective with the prey species they deliver to their offspring. We evaluated trophic segregation between parents and their offspring in blue-footed booby (Sula nebouxii) by measuring stable isotope ratios (delta N-15 and delta C-13) in blood samples during two breeding seasons and at different reproductive stages ( incubation, early and late chick rearing). Additionally, we examined if d15N values from chicks were correlated with their condition as reflected in blood alkaline phosphatase (ALP) levels. d15N values increased and delta C-13 values decreased in adults as the breeding season progressed, indicating differences in foraging regions or the assimilated prey. delta N-15 values differed

机译：由于较高的能量需求，在繁殖过程中海洋动物通常会选择食物的数量和质量。作为中心地带的觅食者，海鸟通常会对交付给其后代的猎物物种具有选择性。我们通过测量两个繁殖季节和不同生殖阶段（潜伏期，早期，和后期小鸡饲养）。此外，我们检查了雏鸡的d15N值是否与血液碱性磷酸酶（ALP）水平所反映的状况相关。随着繁殖季节的进行，成年动物的d15N值升高，δC-13值降低，这表明觅食区域或被吸收猎物存在差异。 N-15增量值不同

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《Marine biology》 |2017年第3期|38.1-38.11|共11页
作者
Gonzalez-Medina Erick; Alfredo Castillo-Guerrero Jose; Herzka Sharon Z.; Fernandez Guillermo;
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Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Mazatlan 82040, Mexico|Univ Nacl Autonoma Mexico, Posgrad Ciencias Mar & Limnol, Ciudad Univ, Mexico City 04510, DF, Mexico;

CONACYT Univ Guadalajara, Dept Estudios El Desarrollo Sustentable Zona Cost, Ctr Univ Costa Sur, Municipio De Cihuatlan 48980, Jalisco, Mexico;

CICESE, Dept Oceanog Biol, 3918 Carretera Tijuana Ensenada, Ensenada 22860, Baja California, Mexico;

Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Mazatlan 82040, Mexico;

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Flexibility in food resource allocation in parents and selectivity for offspring: variations in delta N-15 and delta C-13 values during breeding of the blue-footed booby

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