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Novelties in Trichomanes L. from Colombia
(Universidad Nacional de Colombia, 2009)
I describe Tricomanes murilloanum A. Rojas a new species from Colombia. The new species is characterized by monomorphic fronds with only the apical pinnae pairs fertile. Additionally, Trichomanes egleri P.G. Windisch is ...
Preliminary evaluation of the effect of juvenile hormone III and methyl farnesoate on spermatophore quality of the white shrimp, Litopenaeus vannamei Boone, 1931 ( Decapodai : Penaeidae )
(2008-04)
Este estudio preliminar es un primer paso en la exploración del efecto de la hormona juvenil III (HJ III) y el
metil farnesoato (MF) sobre la calidad de espermatóforos de Litopenaeus vannamei. La HJ III aplicada cinco ...
Utilización de tres medios orgánicos para la germinación in vitro de semillas de guaria morada, Cattleya skinneri (Bateman)
(Universidad Nacional, Costa Rica, 1993-01-01)
Con el fin de determinar diferencias en la germinación de semillas Cattleya skinneri, ocasionadas por diversos medios de cultivo, en condiciones “in vitro”, fueron evaluados cuatro medios (tratamientos: tres de origen ...
La pesquería de Penaeus stylirostris (Decapoda: Penaeidae) en el Golfo de Nicoya, Costa Rica
(Universidad de Costa Rica, 1995)
A cohort analysis was perfonned for Penaeus stylirostris Stimpson, 1871 in the inner Gulf of Nicoya. Overfishing is evident for males 150-160 mm and in females over 170 mm in length. These groups also showed the highest ...
A new giant velvet worm from Costa Rica suggests absence of the genus Peripatus (Onychophora: Peripatidae) in Central Americ
(Universidad de Costa Rica, 2020-02-03)
Introduction: Neotropical onychophoran taxonomy and diversity has been poorly investigated. Recent studies have discovered problems in species classification: they have questioned the accepted genera and the actual number ...
A proposed solution to the species problem in velvet worm conservation (Onychophora)
(Universidad Estatal a Distancia, 2018)
Onychophorans or velvet worm are the only phylum
without extant marine species and the only invertebrates with a true
placenta, but most species are rare and thus more likely to become
extinct. A key obstacle for ...
Oscillation of the velvet worm slime jet by passive hydrodynamic instability
(Nature Communications, 2015-03-17)
The rapid squirt of a proteinaceous slime jet endows velvet worms (Onychophora) with a unique mechanism for defence from predators and for capturing prey by entangling them in a disordered web that immobilizes their target. ...
Discriminant model and hydrogeochemical processes for characterizing preferential flow paths in four interconnected volcanic aquifers in Costa Rica
(Springer, 2022-11-05)
The volcanic Barva and Colima multiaquifer system is crucial for the drinking water supply of about 1.7 million people,about 30% of the population in Costa Rica. The complexity of this system and the simultaneous occurrence ...
Holistically Managing Pathogens and Nutrients in Urbanizing Tropical Towns: Can Sanitation Technologies Create Safer Conditions for Beach Recreation?
(ACS Publications, 2021-03-02)
Rapidly urbanizing coastal communities are prone to overpopulation
and unrestrained growth that result in pathogen and nutrient
emissions, which impair beach water quality and jeopardize human and
environmental health. ...
Unexplored Character Diversity in Onychophora (Velvet Worms): A Comparative Study of Three Peripatid Species
(Sars International Centre for Marine Molecular Biology, Norway, 2012-12-17)
Low character variation among onychophoran species has been an obstacle for taxonomic and phylogenetic studies in the past, however we have identified a number of new and informative characters using morphological, molecular, ...