0000000000280055
AUTHOR
Jaime Gómez
Diet of the garden dormouse (Eliomys quercinus Linnaeus 1766) in orange groves: seasonal variation and use of available resources
Abstract The aim of this study was to describe the feeding habits of the garden dormouse Eliomys quercinus in orange groves of eastern Spain. The study area was an extensive orange grove near Sagunto (Valencia, Spain). This study combines two different non-invasive methods, the study of food store remains and the macroscopic analysis of feces. A total of 527 feces and the food remains of 172 food stores were recollected from nest boxes. Each feces was classified into five categories according to its characteristics: arthropods, gastropods, oranges, plants, and others. Throughout the year, the garden dormouse consumed all these types of food. The most consumed prey in summer and autumn were …
Factors Shaping Breeding Phenology in Birds: An Assessment of Two Sympatric Acrocephalus Warblers with Different Life Histories
El periodo reproductivo es un rasgo crucial de la historia de la vida e implica importantes consecuencias para la eficacia biologica. Las diferencias en las estrategias de historia de vida pueden conducir a diferentes respuestas a las mismas condiciones ambientales, incluso entre especies estrechamente relacionadas. Investigar los factores que afectan el periodo reproductivo en especies estrechamente relacionadas y simpatricas puede ayudar a comprender la relacion entre los diferentes rasgos de la historia de vida y las respuestas especificas de las especies a los factores ecologicos. En este trabajo investigamos los efectos del momento estacional (fotoperiodo), la variabilidad climatica lo…
Differences in time and space use between two sympatric Acrocephalus warblers with similar diets
Capsule: We found high diet overlap and different uses of space and time between Moustached Warblers Acrocephalus melanopogon and Reed Warblers Acrocephalus scirpaceus breeding in sympatry at a marshland in Spain. Aims: To study the degree of diet overlap between both species, their space use on a local scale and their breeding phenologies. Methods: We studied the breeding phenologies of the two species by standardized ringing activity. Spatial distribution was investigated by point counts. We determined diet composition from emetic samples and we collected invertebrates by standardized sweep-netting to estimate food availability. Results: Diet and prey selection were similar among species.…
Complementarities in innovation strategy: do intangibles play a role in enhancing firm performance?
This article assesses the role of investments in intangible capital and their potential complementarities as a way to improve firm productivity. We focus on the three intangible resources that, according to the literature, have the greatest strategic importance: research and development (R & D), advertising, and human capital. To test our hypotheses, we use a large sample of Spanish manufacturing firms and consider estimates of total factor productivity through a generalized method of moments approach. Our results show evidence of complementarities between R & D and advertising investments and between advertising and human capital. However, they are not conclusive in the case of R & D and h…
Breeding success of a colony of Boat-billed Herons Cochlearius cochlearius (Ciconiiformes: Ardeidae) in pasturelands of Costa Rica
The breeding success of a double-brooding colony of Boat-billed Herons Cochlearius cochlearius was studied in pasturelands of Costa Rica. Mean clutch size in the first clutches (2.9 eggs/nest) was higher than in second and repeat clutches (2.3 eggs/nest). Breeding success was similar in the first attempt and second attempts(20.7 % and 21.7 %, respectively). In both attempts earlier nests enjoyed a higher breeding success. Starvation of the youngest chicks within the nest and destruction of nests by bad weather conditions were the main factors related to nestling death. No effects of human activity on the reproduction of the breeding colony were observed. Rev. Biol. Trop. 54 (4): 1131-1134. …