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Mostrando ítems 451-460 de 1105
Xantismo en peces cíclidos (Cichliformes: Cichlidae) costarricenses, y variación ontogenética en Parachromis dovii
Xanthism in Costa Rican Cichlid fish (Cichliformes: Cichlidae), and ontogenetic variation in Parachromis dovii
(2021)
Introducción: El xantismo o xantocromismo es una anomalía fenotípica que se evidencia por la producción predominante de xantina, un pigmento que le da al organismo una coloración amarillenta. En Costa Rica existen pocos ...
The New Refugium Botanicum. Cischweinfia donrafae
(2016-07)
Cischweinfia donrafae Dressler & Dalström, Selbyana 25(1): 9–10. 2004.
Costa Rica. Alajuela: San Miguel de Sarapiquí, June 4, 1941, C.H. Lankester 1496 (holotype, AMES).
Epiphytic, caespitose herbs to 20 cm tall. Roots ...
Discovery of nicoyamycin A, an inhibitor of uropathogenic Escherichia coli growth in low iron environments
(2017)
High-throughput screening and activity-guided purification identified nicoyamycin A, a natural product comprised of an uncommon 3-methyl-1,4-dioxane ring incorporated into a desferrioxamine-like backbone via a spiroaminal ...
Behavioral changes across novelty habituation: Contextual modulation of self-grooming after a stress event
(2018-07)
Grooming is a widespread behavior in the animal kingdom primarily geared towards the care of the body surface; nonetheless, other behavioral functions have been investigated and postulated. For example, rodents display ...
Bioerosion by the sea urchin Diadema mexicanum along Eastern Tropical Pacific coral reefs
(2016-07-07)
Bioerosion is a natural process in coral reefs. It is fundamental to the health of these ecosystems. In the Eastern Tropical Pacific (ETP) coral reefs, the most important bioeroders are sponges, bivalves, sea urchins and ...
Obituary: William Mark Whitten (1954−2019)
(2019)
On April 11, 2019, Dr. William Mark Whitten,
a prolific neotropical orchid biologist passed away
unexpectedly. He leaves an extensive corpus of work
focused on (but not limited to) orchid pollination
and systematics, ...
Burkholderia from fungus gardens of fungus-growing ants produce antifungals that inhibit the specialized parasite Escovopsis.
(2021-06)
Within animal-associated microbiomes, the functional roles of specific microbial taxa are often uncharacterized. Here, we use the fungus-growing ant system, a model for microbial symbiosis, to determine the potential ...
Scaphosepalum Pfitzer
(2022)
There are just over 50 species of Scaphosepalum Pfitzer recog- nized today. They are widely distributed from Mexico to Bolivia and the Guyana Shield, with the highest species diversity found in the northern Andes, especially ...
The New Refugium botanicum
(2019)
Après le numéro précédent, retour à une forme plus habituelle de cette rubrique dédiée aux artistes:
Sylvia STRIGARI nous explique comment elle s’est initiée à l’illustration botanique, les techniques
qu’elle utilise et, ...