Browsing Facultad de Ciencias Exactas y Naturales by Title
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Fecundidad y época de desove del arenque hebra 0pisthonema Libertate (Pisces: Clupeidae) en el Golfo de Nicoya, Costa Rica
(Universidad Nacional (Costa Rica), 1986-01-01)El arenque hilo Opisthonema libertate Desova todo el año con un máximo entre diciembre y marzo. La proporción de sexos fue estadísticamente diferente solo en mayo, septiembre y diciembre por lo tanto; cualquier sexo podría ... -
Fecundidad, épocas de reproducción y hábitos alimenticios del pargo mancha Lutjanus guttatus (Steindachner) (Pisces lutjanidae) en el Golfo de Nicoya, Costa Rica
(Universidad Nacional (Costa Rica), 1994)La familia Lutjanidae es el principal recurso íctico del Golfo de Nicoya, siendo el pargo mancha, Lutjanus guttatus, la especie más importante de esta familia. Debido a la abundancia de esta especie en la pesquería de esta ... -
Fecundidad, fertilidad e índice gonadosomático de Poecilia reticulata(Pisces: Poeciliidae) en Heredia, Costa Rica
(Universidad de Costa Rica, 2004)Fertility, fecundity and gonadosomatic index of Poecilia reticulata(Pisces: Poeciliidae) in Heredia, Costa Rica. Between September and November of 1998, 1 432 females of Poecilia reticulata were collected in a ... -
Fecundidad, mortalidad embrionaria, tasa de eclosión y sobrevivencia de Dermochelys coriacea (Linnaeus, 1766) en Playa Langosta, Guanacaste. Costa Rica, 1997-1998.
(Universidad Nacional (Costa Rica), 2002)Se determinó la fecundidad, mortalidad embrionaria, tasa de eclosión y sobrevivencia de la tortuga baula (Dermochelys coriacea), en Playa Langosta, Pacífico de Costa Rica, durante la temporada de desove diciembre 1997-marzo ... -
Feed consumption, growth and protein utilization of Colossoma macropomum (Cuvier) at different dietary fish meal/soya meal ratios
(Wiley & Sons, 1996)The effect of a gradual substitution of dietary fish meal protein by soya meal protein on growth, feed uptake and protein utilization of 1 g Colossoma macro pomum (Cuvier) was studied at two different dietary protein ... -
Feeding ecology of invasive lionfish (Pterois volitans and Pterois miles) in the temperate and tropical western Atlantic
(Universidad Nacional (Costa Rica), 2018-03-11)Numerous location-based diet studies have been published describing different aspects of invasive lionfish (Pterois volitans and Pterois miles) feeding ecology, but there has been no synthesis of their diet composition ... -
Fenología reproductiva y ecología de la polinización de la hemiepífita Monstera lentii (Araceae) en Costa Rica
(Universidad Nacional (Costa Rica), 2012)Monstera (Araceae) es un género neotropical de plantas hemiepífitas del cual se conoce poco sobre su ecología y en la mayoría de sus especies se desconocen completamente los aspectos básicos de su biología reproductiva. ... -
Fenología y desarrollo de las agallas de las ramas del güisaro (Psidium guineense Swartz) (Myrtaceae) y su relación con varias especies de Microhimenopteros en Heredia, Costa Rica.
(Universidad Nacional, Costa Rica, 1991-01-01)En una población natural de güísaro (Psidium guineense), en Barva de Heredia, se estudió el desarrollo de las agallas de las ramas y la fenología de cuatro especies de micro himenópteros emergidos de ellas, desde abril de ... -
First description of macropterous male and female of Cryphocricos latus (Heteroptera: Naucoridae) Usinger
(2013-03-29)The macropterous male and female of Cryphocricos latus are herein described for the first time; both were collected in Alajuela, Costa Rica. Notes to separate this species from other macropterous species of the genus are given. -
First Finding Of A Male Aphanolaimus Coomansi (Tsalolichin, 1988) In Tropical Areas
(Universidad Nacional (Costa Rica), 1998)First finding of a male Aphanolaimus coomansi (Tsalolichin, 1988) in tropical ar eas. Nematropica 30:161-166. The rare aquatic nematode Aphanolaimus coomansi Tsalolichin, 1988 was found in some habitats in Costa Rican ... -
First Measurements of Biogenic Hydrocarbons in Air in a Tropical Cloudy Forest, Monteverde, Costa Rica
(David Publishing Compan, 2011)Measurements of biogenic hydrocarbons in ambient air were carried out during 2008 in a cloud y tropical forest in Monteverde, Costa Rica. Isoprene, α-pinene, β-pinene, 3-carene, d-limonene and γ-terpinene were sampled by ... -
First measurements of methyl tert-butyl ether (MTBE) in the ambient air in San Jose, Costa Rica
(2014)A great interest has arisen in establishing the impact of organic compounds on human health and air quality, especially those compounds emitted by automotive traffic. Knowledge of urban air pollutant concentrations is ... -
First record of leucism in brown pelicans (Pelecanus occidentalis) in Costa Rica
(Universidad Nacional (Costa Rica), 2014-12)Leucism in birds is rarely observed in the Pelecaniformes order and has not been recorded for the brown pelican (Pelecanus occidentalis) in Costa Rica. We describe an observation of a leucistic brown pelican with white ... -
First record of non-indigenous Paracaprella pusilla Mayer, 1890 (Crustacea: Amphipoda: Caprellidae) in Golfo de Nicoya, Pacific Coast of Costa Rica
(REABIC, 2018)The caprellid Paracaprella pusilla from the Western Atlantic Ocean is reported for the first time in Golfo de Nicoya, Pacific coast of Costa Rica, representing the third registered invasion of this species in the Eastern ... -
First record of Scapholeberis freyi Dumont and Pen- saert, 1983 (Crustacea:Anomopoda: Daphniidae) from Colombia
(Universidad Nacional Mayor de San Marcos, Perú., 2021)From the analysis of plankton samples from a temporary pond of northern Colombia some female specimen of the daphinid cladoceran Scapholeberis freyi Dumont and Pensaert, 1983 was collected. It represents the first report ... -
First record of the genus ocyochterus from Colombia and new records of ochteridae from costa rica (Hemiptera:Heteroptera)
(2015)The frst Colombian record of Ocyochterus, expanding the previously known distributional range of the genus. Additionally, records of two species of Ochterus from Costa Rica are provided. The material examined is deposited ... -
First record of the nonindigenous Penaeus monodon Fabricius, 1798 (Penaeidae) in the Caribbean Sea of Costa Rica, Central America, with observations on selected aspects of its reproductive biology
(Regional Euro-Asian Biological Invasions Centre (REABIC) (Finlandia), 2015-07-02)This contribution reports, for the first time, the presence of the giant tiger shrimp Penaeus monodon Fabricius, 1798 on the northern Caribbean coast of Costa Rica. This closed-thelycum penaeid species is originally from ... -
First record of the sea anemone Anthopleura nigrescens (Cnidaria: Actiniaria: Actiniidae) on the Pacific coast of Central America
(Marine Biological Association of the United Kingdom, 2012-08)We report the first record of the sea anemone Anthopleura nigrescens on the Pacific coast of Central America. Five specimens from Mata Limón (Costa Rica) were collected from rocks of a man-made breakwater at sub-tidal ... -
First Record of the Turtle Barnacle Stephanolepas muricata from the Paciic Coast of Costa Rica
(Universidad Nacional (Costa Rica), 2012-10)The sessile barnacles (Balanomorpha) included in the family Platylepadidae are obligatory symbionts of motile marine animals, with some species occurring solely on turtles, sea snakes, and ish (Newman & Ross 1976; Pfaller ... -
First record of the whistling Heron, Syrigma sibilatrix (Temminck, 1824) (Aves: Ardeidae) in Costa Rica
(Check List, 2016)We present the first record of Whistling Heron, Syrigma sibilatrix, for Costa Rica, a species considered restricted to South America. An individual was observed foraging in a soccer field at Manzanillo, Limon province, ...