Nestbox cameras reveal geographic, temporal and sex-specific variations in the composition of provisioned prey for a declining farmland raptor

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081766%3A_____%2F24%3A00599720" target="_blank" >RIV/68081766:_____/24:00599720 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41330/24:98723 RIV/60076658:12310/24:43908707

Výsledek na webu

<a href="https://bioone.org/journalArticle/Download?urlId=10.25225%2Fjvb.24071" target="_blank" >https://bioone.org/journalArticle/Download?urlId=10.25225%2Fjvb.24071</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.25225/jvb.24071" target="_blank" >10.25225/jvb.24071</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nestbox cameras reveal geographic, temporal and sex-specific variations in the composition of provisioned prey for a declining farmland raptor

Popis výsledku v původním jazyce

Understanding the foraging ecology of the rapidly declining little owl ( Athene noctua), ), which faces food limitations during the breeding season, is crucial for its effective conservation and management. We assessed the composition of prey provisioned to nestlings using nestbox cameras from 2002-2022 in three countries with different landscape structures (the Czech Republic, Slovakia and the Netherlands). We particularly explored the effect of region (country), nesting stage and parental sex on prey composition. From 41,342 identified prey items, insects predominated the little owl's diet (75.6%), followed by earthworms (19%) and a smaller proportion of vertebrates (mammals and birds). The highest proportion of insects was found in the Netherlands (80.9%), whereas earthworms dominated in Slovakia (79.8%). Vertebrates (particularly small mammals) were important prey delivered during the incubation and early nesting stages, and the representation of insects increased with the progression of the breeding season. Representation of earthworms was highest in the late nesting stage. Females provisioned a higher percentage of earthworms, whereas males provisioned more vertebrates. In conclusion, the little owl's diet during the breeding season comprises a surprisingly high proportion of invertebrates. Further, differences in prey provided are most likely driven by climatic factors, habitat structure and land-use histories (causing differences between countries), different energy requirements and seasonal changes in prey availability (causing differences during individual nesting stages) and sex-specific foraging strategies and parental roles (causing differences between sexes). Conservation activities should focus on restoration and suitable management of different high-quality habitats to enhance the availability and representation of different prey taxa within little owls' territories.

Název v anglickém jazyce

Nestbox cameras reveal geographic, temporal and sex-specific variations in the composition of provisioned prey for a declining farmland raptor

Popis výsledku anglicky

Understanding the foraging ecology of the rapidly declining little owl ( Athene noctua), ), which faces food limitations during the breeding season, is crucial for its effective conservation and management. We assessed the composition of prey provisioned to nestlings using nestbox cameras from 2002-2022 in three countries with different landscape structures (the Czech Republic, Slovakia and the Netherlands). We particularly explored the effect of region (country), nesting stage and parental sex on prey composition. From 41,342 identified prey items, insects predominated the little owl's diet (75.6%), followed by earthworms (19%) and a smaller proportion of vertebrates (mammals and birds). The highest proportion of insects was found in the Netherlands (80.9%), whereas earthworms dominated in Slovakia (79.8%). Vertebrates (particularly small mammals) were important prey delivered during the incubation and early nesting stages, and the representation of insects increased with the progression of the breeding season. Representation of earthworms was highest in the late nesting stage. Females provisioned a higher percentage of earthworms, whereas males provisioned more vertebrates. In conclusion, the little owl's diet during the breeding season comprises a surprisingly high proportion of invertebrates. Further, differences in prey provided are most likely driven by climatic factors, habitat structure and land-use histories (causing differences between countries), different energy requirements and seasonal changes in prey availability (causing differences during individual nesting stages) and sex-specific foraging strategies and parental roles (causing differences between sexes). Conservation activities should focus on restoration and suitable management of different high-quality habitats to enhance the availability and representation of different prey taxa within little owls' territories.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10615 - Ornithology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Vertebrate Biology

ISSN

2694-7684

e-ISSN

2694-7684

Svazek periodika

73

Číslo periodika v rámci svazku

24071

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

14

Strana od-do

24071

Kód UT WoS článku

001333206100001

EID výsledku v databázi Scopus

2-s2.0-85206927274