Results 51 to 60 of about 93,351 (314)

MOLECULAR SEX DETERMINATION IN NEOTROPICAL MONOCHROMATIC HUMMINGBIRDS [PDF]

open access: yes, 2018
∙ Many species of hummingbirds are sexually monochromatic. This is surprising because in all hummingbird species parental care is carried out by females, while males are promiscuous, and this mating system is usually associated with some form of sexual ...
Costa Lopes, Susana Alexandra   +4 more
core   +2 more sources

Nuevos registros de Alouatta palliata (Primate: Atelidae) en los departamentos de Chocó y Risaralda, Colombia

open access: yesMammalogy Notes
Esta nota actualiza la información sobre la distribución del mono aullador de manto (Alouatta palliata) en el Chocó biogeográfico de Colombia, al reportar 15 registros en dos nuevas localidades que extienden su rango conocido en 90km hacia el este, en ...
Alma Hernández-Jaramillo   +3 more
doaj   +1 more source

El “estado ecológico” como concepto para la gestión de la cuenca Salí-Dulce (Tucumán, Argentina)

open access: yesActa Zoológica Lilloana, 2017
El simposio “Problemática de la cuenca Salí-Dulce” del VII Congreso Argentino de Limnología (CAL7) en 2016 expuso las tensiones existentes entre gestores y cien- tíficos.
Hugo R. Fernández
doaj   +1 more source

PRIMER REGISTRO DE NIDIFICACIÓN Y OTRAS OBSERVACIONES SOBRE EL BÚHO VENTRIBANDEADO (PULSATRIX MELANOTA) [PDF]

open access: yes, 2022
The Band-bellied Owl (Pulsatrix melanota) is among the least known Neotropical strigiforms, and up to now, no nesting records of the species have been published. In July 2020 in a locality in the eastern foothills of central Peru, an active nest occupied
Burgos-Andrade, Katherine   +1 more
core   +1 more source

A survey of critically endangered Plecturocebus oenanthe in Moyobamba’s urban forests, Peru

open access: yesScientific Reports
Urban expansion is a global driver of wildlife decline, with cities encroaching into forested areas, leading among other things to habitat loss and fragmentation.
Sam Shanee   +7 more
doaj   +1 more source

Hepatic morphology and serum biochemical profile according to dry and rainy seasons in Pygocentrus nattereri (Characiformes: Serrasalmidae)

open access: yesThe Anatomical Record, EarlyView.
Abstract This study investigated the physiological and morphological adaptations of the liver of the carnivorous fish Pygocentrus nattereri (piranha) in response to seasonal variations (dry and rainy seasons) in the Brazilian Pantanal. The objective was to describe how the liver, a central organ in metabolic regulation, responds to environmental ...
Maria Eduarda Corona Garcia   +9 more
wiley   +1 more source

MicroCT reinvestigation of the only articulated fossil anostomid fish reveals synonymy of Arhinolemur Ameghino, 1898 and Megaleporinus Ramirez et al., 2017

open access: yesThe Anatomical Record, EarlyView.
Abstract Arhinolemur scalabrinii† Ameghino, 1898 was originally described as a strepsirrhine primate (Mammalia) but has been recognized as an anostomid fish since 2012. It remains the only extinct anostomid species known from complete cranial material.
Karen M. Panzeri   +8 more
wiley   +1 more source

A revision of the Neotropical predaceous midges of Brachypogon (Brachypogon) Kieffer (Diptera: Ceratopogonidae) [PDF]

open access: yes, 1998
This revision of the Neotropical predaceous midges of the genus Brachypogon (Brachypogon) Kieffer, recognizes 18 extant species, including the following 12 new species: Brachypogon (B.) apunctipennis, bifidus, bimaculatus, ecuadorensis, ethelae ...
Grogan, William L. Jr.   +1 more
core  

MINIATURE GPS DATA LOGGERS REVEAL HABITAT AFFILIATIONS AND MOVEMENT OF VEERY (CATHARUS FUSCESCENS) DURING THEIR FIRST NON-TRANSIENT PERIOD IN SOUTH AMERICA

open access: yes, 2021
The ecology of Nearctic-Neotropical migrant songbirds in South America is largely unexplored. We used miniature global positioning system (GPS) data loggers to determine the broad habitat associations of nine Veeries (Catharus fuscescens) during their ...
Mancuso, Melanie L.   +7 more
core   +1 more source

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