Results: 38

The peculiar breeding biology of the Amazonian frog Allobates subfolionidificans (Aromobatidae)

An. acad. bras. ciênc; 89 (2), 2017
ABSTRACT Allobates subfolionidificans is a vulnerable and endemic leaf-litter frog from the state of Acre, Brazilian Amazonia. We monitored a population of A. subfolionidificans through regular censuses and mark-recapture of 181 individuals during an entire breeding season to characterize its reproductiv...

Ecología de la anidación de Crocodylus acutus (Reptilia: Crocodylidae) en Bahía Portete, La Guajira, Colombia

Rev. biol. trop; 65 (1), 2017
ResumenEn Colombia, C. acutus se encuentra catalogada en peligro crítico. Durante julio 2007, agosto 2008, junio y agosto 2009 y entre marzo y agosto 2010 y 2011, la población en Bahía Portete fue estudiada para evaluar la anidación y obtener la información necesaria para el ajuste de un programa de...

Population structure and reproduction of a migratory fish Leporinus piau (Characiformes: Anostomidae) in a semiarid tropical reservoir, Brazil

Rev. biol. trop; 64 (4), 2016
Abstract:Migratory fishes have been seriously impacted by the building of reservoirs and because of the negative effects of these projects such as the interruption of migratory routes, reduction or elimination of spawning/ feeding areas, and initial development can influence the population structure the ...

Profile of plasmatic progesterone on pregnancy, and the postpartum estrus of Dasyprocta prymnolopha (Rodentia: Dasyproctidae)

Rev. biol. trop; 64 (4), 2016
Abstract:The agouti (Dasyprocta sp.) is a hystricomorph rodent found in some regions of the Americas. It is an important cynegetic species, which indicates that the overhunting is a threat to their conservation. Very little is known about this wildlife in relation to what already has been studied in dome...

Desove espontáneo, ontogenia y crecimiento en cautiverio de Cynoscion squamipinnis (Perciformes: Sciaenidae)

Rev. biol. trop; 64 (3), 2016
ResumenLas corvinas son especies de interés comercial que han sido sobreexplotadas en el Golfo de Nicoya, Costa Rica. El objetivo de este estudio fue describir por primera vez, el desove espontáneo y la ontogenia de las larvas de la corvina aguada Cynoscion squamipinnis en cautiverio, con el fin de rea...

Uso de suplementos para acasalamento de bezerras Angus aos 14 meses de idade

O experimento foi conduzido com o objetivo de avaliar o desenvolvimento de novilhas de corte em três sistemas alimentares: exclusivamente em pastagem de azevém (Lolium multiflorum Lam.) ou em pastagem de azevém e recebendo 0,93% do peso corporal de grão de milho inteiro ou grão de aveia branca como ...

Selection of prey to improve biological parameters of the predator Podisus nigrispinus (Dallas, 1851) (Hemiptera: Pentatomidae) in laboratory conditions

Braz. j. biol; 76 (2), 2016
Abstract Mass production of predatory stinkbugs in the laboratory is prioritized to release them into the field as part of IPM programs. Therefore, the aim of this study was to identify the best prey for rearing the predator Podisus nigrispinus (Dallas, 1851) (Hemiptera: Pentatomidae) among five differen...

Biological aspects and mating behavior of Leucothyreus albopilosus (Coleoptera: Scarabaeidae)

Rev. biol. trop; 64 (2), 2016
AbstractThe genus Leucothyreus has been linked to some commercial plant crop pests. Eventhough several species have been described for this genus, information about this group is still scarce. This study investigated some biological aspects and mating behavior in Leucothyreus albopilosus. Studies were co...

Reproductive system, mating behavior and basic ecology of an extremely rare tropical snail: Drymaeus tripictus (Stylommatophora: Bulimulidae)

Rev. biol. trop; 64 (1), 2016
Abstract Very little is known about the ecology and biology of Drymaeus tripictus, an extremely rare and endemic land snail species from Costa Rican highlands. I studied the ecology and reproductive biology of D. tripictus from April 2009 through June 2010 in an old forest, a young forest and a Cupressus...

Reproducción Estacional en el Macho

Int. j. morphol; 30 (4), 2012
Hay una sorprendente relación entre el ambiente y adaptaciones de la conducta reproductiva, muy evidente en los reproductores estacionales que pueden reproducirse en días cortos o largos, de acuerdo a factores proximales, especialmente el fotoperiodo luminoso que provoca cambios fotoneuroendocrinos. Es...