Comparative analysis of the plasma metabolome of migrating passerines: novel insights into stopover metabolism DOI Creative Commons
Adi Domer, Weronika Jasińska, Leah Rosental

и другие.

Journal of Avian Biology, Год журнала: 2024, Номер unknown

Опубликована: Дек. 5, 2024

During long‐distance migration, many birds experience periods of either prolonged fasting (during endurance flights) or extensive feeding stopovers). Despite decades research on avian metabolism during questions have remained unanswered, as such mainly focused targeted metabolites and fat metabolism. Here, we examined the plasma‐metabolome two migrating passerine species before they crossed Sahara Desert. Birds were sampled at sites populated by Pistacia trees bearing fat‐rich fruits an additional site dominated blooming Eucalyptus trees. The blood samples analyzed using both GC‐MS LC‐MS, untargeted approach. Examination metabolic pathways activated stopovers indicated a crucial role for cycling glucose through Cori Cahill cycles in resting recovery processes. This novel perspective, conducted free‐ranging birds, suggests evolution insulin resistance due to factors exercise, fasting, preference fatty acid oxidation akin cell trauma recovery. We detected significant inter‐site variations birds' polar lipophilic profiles. interpret differences be associated with physiological state that are considered landed night prior capture showing different profiles compared spent more time stopover site. In contrast, distinctions primary food source was available them sites. study underscores challenge interpreting commonly used indicators assessing state, which predominantly derived from lipid complex ecological systems.

Язык: Английский

Migration Strategy and Diet Affect the Metabolism of Passerine Birds During Endurance Flight DOI Creative Commons
Susanne Jenni‐Eiermann, Lukas Jenni

Ecology and Evolution, Год журнала: 2025, Номер 15(4)

Опубликована: Апрель 1, 2025

ABSTRACT Bird migration varies greatly in overall distance and length of single flight bouts. Therefore, we expect that metabolic adaptations may also differ widely among migrants. Endurance is mainly fuelled by fat complemented protein. The proportions lipids protein accumulated before flights, spent during flight, depend on food type. A fruit diet facilitates fattening more than a proteinous arthropod or seed diet. Adaptations to maximize lipid use vary with the We type strategy (length bouts, distance) affects metabolism. On Swiss Alpine pass, caught 30 species nocturnal diurnal migrant passerines out natural migratory compared them conspecifics kept inactive. examined effects strategy, primary diet, body stores plasma concentrations six metabolites fat, protein, carbohydrate metabolism, used as indicators relative fuel use. During immediate (short hops day long bouts night), general (long‐ short‐distance migration) affected metabolite levels, while had an additional effect. Triglyceride free fatty acid levels were high night‐migrants frugivores. Uric glucose insectivores. Glucose, ß‐hydroxy‐butyrate, glycerol less dependent day/night‐migration profiles indicate degree depending current stores. Day‐migrating insectivores granivores glycogen higher night Frugivores maximized Long‐distance migrants favored even further. Hence, long‐distance night‐migrant frugivores loads appear best adapted for flight.

Язык: Английский

Процитировано

0
Comparative analysis of the plasma metabolome of migrating passerines: novel insights into stopover metabolism DOI Creative Commons
Adi Domer, Weronika Jasińska, Leah Rosental

и другие.

Journal of Avian Biology, Год журнала: 2024, Номер unknown

Опубликована: Дек. 5, 2024

During long‐distance migration, many birds experience periods of either prolonged fasting (during endurance flights) or extensive feeding stopovers). Despite decades research on avian metabolism during questions have remained unanswered, as such mainly focused targeted metabolites and fat metabolism. Here, we examined the plasma‐metabolome two migrating passerine species before they crossed Sahara Desert. Birds were sampled at sites populated by Pistacia trees bearing fat‐rich fruits an additional site dominated blooming Eucalyptus trees. The blood samples analyzed using both GC‐MS LC‐MS, untargeted approach. Examination metabolic pathways activated stopovers indicated a crucial role for cycling glucose through Cori Cahill cycles in resting recovery processes. This novel perspective, conducted free‐ranging birds, suggests evolution insulin resistance due to factors exercise, fasting, preference fatty acid oxidation akin cell trauma recovery. We detected significant inter‐site variations birds' polar lipophilic profiles. interpret differences be associated with physiological state that are considered landed night prior capture showing different profiles compared spent more time stopover site. In contrast, distinctions primary food source was available them sites. study underscores challenge interpreting commonly used indicators assessing state, which predominantly derived from lipid complex ecological systems.

Язык: Английский

Процитировано

0