Sunbirds’ tendency to hover: the roles of energetic rewards, inflorescence architecture and rain

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985939%3A_____%2F21%3A00546941" target="_blank" >RIV/67985939:_____/21:00546941 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/21:10440312

Výsledek na webu

<a href="https://doi.org/10.1111/jav.02818" target="_blank" >https://doi.org/10.1111/jav.02818</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/jav.02818" target="_blank" >10.1111/jav.02818</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sunbirds’ tendency to hover: the roles of energetic rewards, inflorescence architecture and rain

Popis výsledku v původním jazyce

Although the Old World sunbirds are generally considered to be an ecological ana-logue of the New World hummingbirds, it is commonly believed that in contrast to hummingbirds, sunbirds perch while feeding. Nevertheless, recent studies have shown that Old World nectarivores hover while feeding more frequently than previously thought, and some Old World plants seem to have adapted to hovering bird pollina-tors. To reveal the importance of sunbird foraging behavior in nectar acquisition and to test whether this behavior is determined by plant architecture and rain intensity, we focused on the specialized West African pollination system of Impatiens sakeriana and its two major pollinators, the Cameroon sunbird Cyanomitra oritis and the north-ern double-collared sunbird Cinnyris reichenowi. C. oritis hovered more often than C. reichenowi while feeding on flowers, although both species were observed hovering reg-ularly. For both species, hovering reduced the feeding time, but this reduction and the consequent estimated changes in energetic intake were species-specific. We found that both floral pedicel and peduncle length, as well as precipitation, negatively affected the probability of C. reichenowi hovering but did not have any significant effect on the behavior of C. oritis. Our study demonstrates that hovering behavior is common in the studied sunbird taxa and that plant architecture and environmental factors can influ-ence sunbird foraging behavior. Nevertheless, the extent of hovering versus perching behavior, as well as the effects of biotic and abiotic factors, is species-specific.

Název v anglickém jazyce

Sunbirds’ tendency to hover: the roles of energetic rewards, inflorescence architecture and rain

Popis výsledku anglicky

Although the Old World sunbirds are generally considered to be an ecological ana-logue of the New World hummingbirds, it is commonly believed that in contrast to hummingbirds, sunbirds perch while feeding. Nevertheless, recent studies have shown that Old World nectarivores hover while feeding more frequently than previously thought, and some Old World plants seem to have adapted to hovering bird pollina-tors. To reveal the importance of sunbird foraging behavior in nectar acquisition and to test whether this behavior is determined by plant architecture and rain intensity, we focused on the specialized West African pollination system of Impatiens sakeriana and its two major pollinators, the Cameroon sunbird Cyanomitra oritis and the north-ern double-collared sunbird Cinnyris reichenowi. C. oritis hovered more often than C. reichenowi while feeding on flowers, although both species were observed hovering reg-ularly. For both species, hovering reduced the feeding time, but this reduction and the consequent estimated changes in energetic intake were species-specific. We found that both floral pedicel and peduncle length, as well as precipitation, negatively affected the probability of C. reichenowi hovering but did not have any significant effect on the behavior of C. oritis. Our study demonstrates that hovering behavior is common in the studied sunbird taxa and that plant architecture and environmental factors can influ-ence sunbird foraging behavior. Nevertheless, the extent of hovering versus perching behavior, as well as the effects of biotic and abiotic factors, is species-specific.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10615 - Ornithology

Projekt

<a href="/cs/project/GA18-10781S" target="_blank" >GA18-10781S: Uspořádání společenstev rostlin a jejich ptačích opylovačů v afrotropech: vliv nadmořské výšky a sezonality</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Avian Biology

ISSN

0908-8857

e-ISSN

1600-048X

Svazek periodika

52

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

DK - Dánské království

Počet stran výsledku

10

Strana od-do

e02818

Kód UT WoS článku

000663861900001

EID výsledku v databázi Scopus

2-s2.0-85108268850