Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada

The ecology of shrews is better understood in the boreal forest of Eurasia than in similar regions of North America. In this study, the abundance, reproduction, population structure, and diet of Sorex cinereus (Masked shrew) were analyzed in jack pine plantations in the southern boreal forest of eas...

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Detalles Bibliográficos
Autor principal: Bellocq, Maria Isabel
Publicado: 2003
Materias:
boreal forest
diet
foraging behavior
insectivore
population dynamics
reproduction
Canada
Arachnida
Araneae
Araneus
Coleoptera
Lepidoptera
Sorex araneus
Sorex cinereus
Soricidae
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0003455X_v40_n1_p27_Bellocq
http://hdl.handle.net/20.500.12110/paper_0003455X_v40_n1_p27_Bellocq
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_0003455X_v40_n1_p27_Bellocq
record_format dspace
spelling paper:paper_0003455X_v40_n1_p27_Bellocq2023-06-08T14:24:28Z Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada Bellocq, Maria Isabel boreal forest diet foraging behavior insectivore population dynamics reproduction Canada Arachnida Araneae Araneus Coleoptera Lepidoptera Sorex araneus Sorex cinereus Soricidae The ecology of shrews is better understood in the boreal forest of Eurasia than in similar regions of North America. In this study, the abundance, reproduction, population structure, and diet of Sorex cinereus (Masked shrew) were analyzed in jack pine plantations in the southern boreal forest of eastern Canada over two years. Abundance of S. cinereus showed variations between years. The seasonal pattern of capture was unimodal with the peak occurring at the end of the summer. Breeding began in May or earlier with litter sizes averaging 6.7 ± 0.3 (mean ± SE) embryos per pregnant female. The breeding season was at least six months long (May-October). Two distinctive cohorts were identified. The spring cohort, primarily produced by overwintering shrews, had a higher reproductive value than the summer cohort because they may have reproduced in the year of birth. The summer cohort was produced by both overwintering individuals and shrews of the first generation in that year. Lepidopteran larvae (moth) were the primary food type in stomach contents of immature shrews, followed by coleopterans (beetles) and arachnida (spiders). The mean percentage volume of lepidopteran larvae in shrew stomach contents was similar between years, months, and sites. The patterns identified for S. cinereus are compared with those of the most common Eurasian shrew (Sorex araneus). Fil:Bellocq, M.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0003455X_v40_n1_p27_Bellocq http://hdl.handle.net/20.500.12110/paper_0003455X_v40_n1_p27_Bellocq
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic boreal forest
diet
foraging behavior
insectivore
population dynamics
reproduction
Canada
Arachnida
Araneae
Araneus
Coleoptera
Lepidoptera
Sorex araneus
Sorex cinereus
Soricidae
spellingShingle boreal forest
diet
foraging behavior
insectivore
population dynamics
reproduction
Canada
Arachnida
Araneae
Araneus
Coleoptera
Lepidoptera
Sorex araneus
Sorex cinereus
Soricidae
Bellocq, Maria Isabel
Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada
topic_facet boreal forest
diet
foraging behavior
insectivore
population dynamics
reproduction
Canada
Arachnida
Araneae
Araneus
Coleoptera
Lepidoptera
Sorex araneus
Sorex cinereus
Soricidae
description The ecology of shrews is better understood in the boreal forest of Eurasia than in similar regions of North America. In this study, the abundance, reproduction, population structure, and diet of Sorex cinereus (Masked shrew) were analyzed in jack pine plantations in the southern boreal forest of eastern Canada over two years. Abundance of S. cinereus showed variations between years. The seasonal pattern of capture was unimodal with the peak occurring at the end of the summer. Breeding began in May or earlier with litter sizes averaging 6.7 ± 0.3 (mean ± SE) embryos per pregnant female. The breeding season was at least six months long (May-October). Two distinctive cohorts were identified. The spring cohort, primarily produced by overwintering shrews, had a higher reproductive value than the summer cohort because they may have reproduced in the year of birth. The summer cohort was produced by both overwintering individuals and shrews of the first generation in that year. Lepidopteran larvae (moth) were the primary food type in stomach contents of immature shrews, followed by coleopterans (beetles) and arachnida (spiders). The mean percentage volume of lepidopteran larvae in shrew stomach contents was similar between years, months, and sites. The patterns identified for S. cinereus are compared with those of the most common Eurasian shrew (Sorex araneus).
author Bellocq, Maria Isabel
author_facet Bellocq, Maria Isabel
author_sort Bellocq, Maria Isabel
title Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada
title_short Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada
title_full Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada
title_fullStr Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada
title_full_unstemmed Population dynamics and foraging of Sorex cinereus (masked shrew) in the boreal forest of eastern Canada
title_sort population dynamics and foraging of sorex cinereus (masked shrew) in the boreal forest of eastern canada
publishDate 2003
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0003455X_v40_n1_p27_Bellocq
http://hdl.handle.net/20.500.12110/paper_0003455X_v40_n1_p27_Bellocq
work_keys_str_mv AT bellocqmariaisabel populationdynamicsandforagingofsorexcinereusmaskedshrewintheborealforestofeasterncanada
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