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Éxito reproductivo de Caligo atreus (Lepidoctera: Nymphalidae) en condiciones de cultivo
(Universidad de Costa Rica, 1999)
En Río Macho, Cartago, Costa Rica, se estudiaron en cautiverio, los estados del ciclo de vida de
Caligo atreus (Lepidoptera: Nymphalidae), con Heliconia tortuosa (Heliconiaceae) como planta hospedera. Los
huevos fueron ...
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 ...
Natalidad de Chelydra serpentina (Testudines: Chelydridae) en Costa Rica
(Universidad de Costa Rica, 1996)
Three Chelydra serpentina nests were monitored from September through October 1993. Maximum natality was 92% (mean 33.73%) and seemed to be associated with high temperature potasium and a moderate concentration of calcium ...
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 ...
Morfometría, época reproductiva y talla comercial de Macrobrachium americanum (crustacea: palaemonidae) en Guanacaste, Costa Rica
(Universidad Nacional, Costa Rica, 1996)
Macrobrachium americanum was collected in the San Amires River, Santa Cruz, Guanacaste, Co sta Rica (lOO 22' 00" N; 85043' 00" W), from March 1984 to Apri11985. Fo r 290 specimens the relationship tota l lengthto tal ...
Madurez sexual, Índice de condición y rendimiento de Pinctada mazatlanica (Pterioida: Pteriidae), Golfo de Nicoya, Costa Rica
(Universidad de Costa Rica, 1997)
The reproductive cycle, condition index and meat yield of 627 specimens of pearl oyster, Pinctada mazat/anica were studied in Isla Pan de Azúcar, Golfo de Nicoya, Costa Rica from September 1993 through September ...
Larvae of the Costa Rican Hetaerina (Odonata: Calopterygidae) with comments on distribution
(Royal Entomological Society, 1993)
The larvae of seven of the nine Costa Rican species of Hetaerina
(H.capitalis, H.cruentata, H. fuscogutfata, H. majuscula, H. miniata, H. occisa and
H. titia) were identified by matching their Cellulose Acetate Gel ...
Las especies de Trachelomonas (Algas: Euglenophyta) en tres lagunas volcánicas de Costa Rica
(Universidad de Costa Rica, 1995)
The algae of three lakes of volcanic origin, Laguna Hule, Congo and Bosque Alegre (740 m. above see
leve!) were studied frorn 1989 to 1993. Five Trachelomonas (Euglenophyta ) species and sorne of their varieties are ...
Variación estacional en el Lago de Rio Cuarto, provincia de Alajuela, Costa Rica. II Distribución estacional del zooplancton
(Universidad Nacional [Costa Rica], 1990-01-01)
En el lago de Río Cuarto, provincia de Alajuela, Costa Rica, durante los meses comprendidos entre febrero de 1984 y marzo de 1985, se realizaron estudios sobre la composición de la comunidad zooplanctónica, las variaciones ...
Diferencias morfométricas por sexo de tres especies del genero Opisthonema (Psices: Clupeidae) de la Costa del Pacifico, Costa Rica
(Universidad Nacional [Costa Rica], 1990-01-01)
Se comparan algunas variables morfométricas en los dos sexos de tres especies de Opisthonema (O. libertate, O. medirastre y O. bullerri) provenientes de las costa Pacífica de Costa Rica. Las hembras como los machos revelaron ...