Effects of seed quality and abundance on the foraging behavior of deer mice

Lobo, Nikhil; Green, Derek J.; Millar, John S.

doi:10.1644/12-mamm-a-295.1

Cited by 16 publications

(11 citation statements)

References 51 publications

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“…This efficiency improves when using a lure or bait (Boulerice andVan Fleet 2016, McLean et al 2017). Modern camera traps can record also videos that can be used in behavioural studies (Lobo et al 2013, Flagel et al 2016.…”

Section: Camera Trapsmentioning

confidence: 99%

Towards more compassionate wildlife research through the 3Rs principles: moving from invasive to non-invasive methods

Zemanova

2020

Wildlife Biology

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Section: Camera Trapsmentioning

confidence: 99%

Towards more compassionate wildlife research through the 3Rs principles: moving from invasive to non-invasive methods

Zemanova

2020

Wildlife Biology

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“…The GUT, GUD, and trophic transfer of resources of differently sized foragers were therefore measured under controlled conditions. To this end, we used a meso-cosm-based experimental set-up that excluded behavioural changes on the part of foragers in response to both environmental cues such as temperature [ 38 , 39 ], risk perception [ 40 , 41 , 42 ], resource quality [ 43 , 15 , 44 , 45 ], habitat [ 45 , 46 ] and patch structure [ 47 ]. The experimental design also excluded inter-specific competition [ 48 , 49 ], but included the effect of intra-specific competition [ 50 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

Revisiting GUD: An empirical test of the size-dependency of patch departure behaviour

et al. 2018

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Behaviour related to patch resource exploitation is a major determinant of individual fitness. Assuming the size-dependency of patch departure behaviour, model-based approaches have shown size-mediated coexistence in systems of competing species. However, experimental evidence for the influence of body size on patch use behaviour is scarce. In this study, we explore whether allometric principles provide an underlying framework for interspecific patterns of resource use. To this end, we propose a meso-cosm approach using three species of gastropods differing in size as a model system and 32P radio-isotopic techniques as a measure of resource use. Foragers of different size were placed in an artificial patch, provided with a limited amount of labelled resource and let them free to move as resources decrease and scarcity is sensed. We investigated the extent to which individual body size affects the exploitation of resources by examining Giving Up Density (GUD), Giving Up Time (GUT), resource absorption rate and exploitation efficiency as components of individual exploitation behaviour. To compare positive, constant and negative individual size scaling of population energy requirements, experimental trials with an equal numbers and equal biomass of differently sized foragers were carried out, and an experimental trial with equal metabolic requirements was simulated. We observed clear size dependency in the patch departure behaviour of the experimental organisms. Even under conditions of equivalent overall population energy requirements, larger foragers decided to leave the resource patch earlier and at a higher density of resources than smaller ones. Smaller foragers were able to prolong their presence and make more use of the resources, resulting in an inverse body-size scaling of resource exploitation efficiency.

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“…In the Neotropics, where rodents are diverse and abundant ( Voss and Emmons 1996 ; Pacheco et al 2009 ), in desert ( Marquet 1994 ), Andean ( Pizzimenti and De Salle 1981 ; Novillo and Ojeda 2014 ), and rainforest habitats ( Fonseca 1989 ; Patterson et al 1998 ; Solari et al 2006 ; Pacheco et al 2009 , 2011 ), knowledge of rodent feeding habits can facilitate understanding not only the ecology of their habitats but also provide information necessary for management, conservation, and restoration of forest rodent populations ( Pacheco et al 2013 ; Salas et al 2013 ). For North America, a rich literature exists regarding the ecology and dietary habits of small desert-dwelling rodents ( Brown and Lieberman 1973 ; Reichman 1975 ; Meserve 1981 ; Wolff et al 1985 ; Kotler and Brown 1988 ; Brown 1989 ; Kelt et al 2004 ; Stevens and Tello 2009 ; Meserve et al 2011 ; Lobo et al 2013 ; Stevens and Anderson 2014 ). A general consensus from these studies is that rodents, through their seed consumption, seed predation, scatter-hoarding, and caching behavior, elicit profound influences on plant reproductive success and community structure ( Ostfeld et al 1997 ; Kelt 2011 ).…”

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confidence: 99%

Diet of a sigmodontine rodent assemblage in a Peruvian montane forest

Sahley¹,

Cervantes²,

Pacheco³

et al. 2015

JMAMMAL

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Knowledge of feeding habits of small rodents is necessary for understanding food webs, trophic structure, and plant–animal interactions in Neotropical forests. Despite several studies that have investigated community structure and feeding behavior of rodents, large gaps remain in our understanding of their guild occupancy. Our objective was to investigate the diets of 7 species of small (< 100g) sympatric sigmodontine rodents in a high (3,500 m) Andean montane rainforest in Peru. We qualitatively and quantitatively assessed diet items in fecal samples from livetrapped rodents from 2009 to 2012. Frequency data for 4 diet categories indicated that all 7 species of rodents contained 4 diet categories in fecal samples: arthropods (88%), remains of leaves and fibers from plants (61%), intact seeds (with or without fruit pulp; 50%), and mycorrhizal spores (45%). Omnivory was found to be a strategy used by all species, although contingency table analysis revealed significant differences among and within species in diet categories. Cluster analysis showed 2 main groupings: that of the Thomasomys spp. plus Calomys sorellus group which included high amounts of intact seeds and plant parts in their fecal samples, and those of the genera Akodon, Microryzomys, Oligoryzomys, which included a greater proportion of arthropods in their fecal samples, but still consumed substantial amounts of fruit and plant parts. Intact seed remains from at least 17 plant species (9 families) were found in fecal samples. We concluded that this assemblage of sigmodontine rodents is omnivorous but that they likely play an important role as frugivores and in seed dispersal in tropical montane forests in Peru.El conocimiento de los hábitos alimenticios de roedores pequeños es necesario para comprender cadenas alimenticias, estructura trófica, e interacciones planta-animal en los bosques neotropicales. A pesar de que numerosos estudios han investigado la estructura de comunidades y el comportamiento de forrajeo en roedores, aún existen grandes vacíos en nuestra comprensión de sus gremios tróficos. Nuestro objetivo fue investigar las dietas de siete especies de pequeños (< 100 g) roedores sigmodontinos simpátricos en un bosque montano andino a 3.500] m en Perú. Cualitativamente y cuantitativamente evaluamos la dieta en muestras fecales de roedores capturados entre el 2009 y el 2012. Datos de frecuencia para cuatro categorías de dieta indicaron que las siete especies de roedores consumieron cuatro categorías de dieta: artrópodos (88%), pedazos de hojas y fibras de plantas (61%), semillas intactas (con o sin pulpa de frutos; 50%), y esporas de micorrizas (45%). Omnivoría fue la estrategia utilizada por todas las especies, aunque el análisis con tablas de contingencia reveló diferencias significativas entre y dentro de especies en categorías de dieta. El análisis de agrupación presentó 2 grupos principales: el grupo Thomasomys spp. y Calomys sorellus, que incluye una gran proporción de semillas intactas, y partes de plantas en las muestras fecales y el g...

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Effects of seed quality and abundance on the foraging behavior of deer mice

Cited by 16 publications

References 51 publications

Towards more compassionate wildlife research through the 3Rs principles: moving from invasive to non-invasive methods

Towards more compassionate wildlife research through the 3Rs principles: moving from invasive to non-invasive methods

Revisiting GUD: An empirical test of the size-dependency of patch departure behaviour

Diet of a sigmodontine rodent assemblage in a Peruvian montane forest

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