Reproductive biology and isolation mechanisms in rupicolous species of the Acianthera prolifera complex (Orchidaceae) occurring in southeastern Brazil

2011 ◽  
Vol 293 (1-4) ◽  
pp. 161-176 ◽  
Author(s):  
Marcos Cabral de Melo ◽  
Pedro Paulo Goulart Taucce ◽  
Eduardo Leite Borba
Keyword(s):  
Reproductive Biology ◽  
Southeastern Brazil ◽  
Isolation Mechanisms

scholarly journals Reproductive biology and feeding of Curimatella lepidura (Eigenmann & Eigenmann) (Pisces, Curimatidae) in Juramento reservoir, Minas Gerais, Brazil

2006 ◽  
Vol 23 (2) ◽  
pp. 314-322 ◽  
Author(s):  
Érika R. de Alvarenga ◽  
Nilo Bazzoli ◽  
Gilmar B. Santos ◽  
Elizete Rizzo
Keyword(s):  
Sexual Dimorphism ◽  
Reproductive Biology ◽  
Sexual Maturation ◽  
Nutrient Recycling ◽  
Reproductive Activity ◽  
Feeding Habit ◽  
Southeastern Brazil ◽  
Short Rainy Season ◽  
Probable Role ◽  
Energetic Reserves

Reproductive biology and feeding of Curimatella lepidura (Eigenmann & Eigenmann, 1889) were studied in Juramento reservoir, São Francisco River basin, Southeastern Brazil. Histological analyses and gonadosomatic indexes revealed females and males in reproductive activity from October to March and total spawning occurring from January to March coupled with the peak of spermiating males. In the dry season, the fishes accumulated energetic reserves for reproduction during a short rainy season. The species presented sexual dimorphism, being females larger than males and sexual maturation occurring close to 7.7 cm standard length for females and 7.1 cm for males. C. lepidura presented iliophagous feeding habit, ingesting mainly sediment/detritus and a small amount of acari, algae, Tricoptera insects and Ostracoda crustaceans, suggesting a probable role in nutrient recycling of the Juramento reservoir.

Reproductive biology of the false coral snake Oxyrhopus guibei (Colubridae) from southeastern Brazil

2002 ◽  
Vol 23 (4) ◽  
pp. 495-504 ◽  
Author(s):  
Otavio Marques ◽  
Lígia Pizzatto
Keyword(s):  
Body Size ◽  
Reproductive Biology ◽  
Rainy Season ◽  
Reproductive Activity ◽  
Climatic Conditions ◽  
Southeastern Brazil ◽  
Coral Snake ◽  
Males And Females ◽  
Reproductive Cycles ◽  
Number Of Individuals

AbstractThe reproductive biology of the false coral snake, Oxyrhopus guibei, was studied through dissection of 496 specimens, combined with observations on captive individuals. Males mature with smaller body size than females, females attain much larger body size, and male-male combat is not expected. Clutch size ranged from 3 to 20, and was correlated with female length. Reproductive cycles in both males and females seem to be continuous, with vitellogenesis and spermatogenesis occurring throughout the year. Reproductive activity in both sexes decreased at the end of the rainy season possibly due to previous intense reproductive activity in more favorable climatic conditions. The smaller number of individuals collected at the end of the rainy season apparently occurs due to the decrease of reproductive activity of this snake.

Aspects of the reproductive biology of Physalaemus cuvieri (Anura: Leptodactylidae) in northeastern Brazil

1995 ◽  
Vol 16 (1) ◽  
pp. 67-76 ◽  
Author(s):  
Larissa Barreto ◽  
Gilda V. Andrade
Keyword(s):  
Reproductive Biology ◽  
Reproductive Activity ◽  
Northeastern Brazil ◽  
Southeastern Brazil ◽  
Territorial Behaviour ◽  
Open Area ◽  
Reproductive Tactics ◽  
Male And Female ◽  
Calling Activity ◽  
Physical Interactions

AbstractObservations were made on the reproductive biology of Physalaemus cuvieri from open area habitat in São Luis, MA, Brazil, from August 1988 to August 1989. The reproductive tactics are compared to those of the same species in southeastern Brazil. Vocalization and reproductive activity were restricted the rainy season (January to June), with peaks of activity during late March and early April. Nocturnal calling activity turn was prolonged, with little variation in the number of individual calling during the night. The presence of communal foam nests suggests non-territorial behaviour in this species. However, males called from the same sites all night long. They showed differentiated vocalizations or antiphony, and aggressive physical interactions, which suggests that there may be some territorial behaviours in males. The remainder of the territorial behaviour is related to persistence of the invading male. Satellite behaviour, females mate choice, and a stereotyped behaviour (e.g. quick circular movement of both male and female) prior to amplexus, were also associated with territoriality.

scholarly journals Reproductive biology of the Brazilian sharpnose shark (Rhizoprionodon lalandii) from southeastern Brazil

2007 ◽  
Vol 64 (9) ◽  
pp. 1829-1835 ◽  
Author(s):  
Fabio S. Motta ◽  
Rafael C. Namora ◽  
Otto B. F. Gadig ◽  
F. M. S. Braga
Keyword(s):  
Reproductive Biology ◽  
Positive Relationship ◽  
Ovarian Follicles ◽  
Southeastern Brazil ◽  
Brazilian Coast ◽  
Marine Science ◽  
Size At Maturity ◽  
Total Length ◽  
Males And Females ◽  
Using Data

Abstract Motta, F. S., Namora, R. C., Gadig, O. B. F., and Braga, F. M. S. 2007. Reproductive biology of the Brazilian sharpnose shark (Rhizoprionodon lalandii) from southeastern Brazil. – ICES Journal of Marine Science, 64: 1829–1835. The reproductive biology of the Brazilian sharpnose shark, Rhizoprionodon lalandii, off southeastern Brazil was investigated using data from gillnet landings. The size-at-maturity for males and females was estimated to be 59 and 62 cm total length (LT), respectively. Ovarian fecundity ranged from 3 to 7 follicles (mean = 4.54), and uterine fecundity from 1 to 5 embryos (mean = 3.3). There was a slight positive relationship between female LT and the number of ovarian follicles, but uterine fecundity was not related to female LT. Embryonic growth is fast following fertilization during summer and autumn. Gestation requires 11–12 months, and peak parturition is between August and September. A comparison of size-at-maturity between animals from northeastern and southeastern Brazil suggests the existence of at least two stocks of R. lalandii along the Brazilian coast.

Reproductive biology of Gymnodactylus darwinii (Gray, 1845) (Squamata: Phyllodactylidae) from southeastern Brazil

2020 ◽  
Author(s):  
Jhonny J. M. Guedes ◽  
Déborah Fantuzzi ◽  
Clodoaldo L. Assis ◽  
Renato N. Feio
Keyword(s):  
Reproductive Biology ◽  
Southeastern Brazil

scholarly journals Diet, reproductive biology, and ecological interactions of Fritziana goeldii (Anura: Hemiphractidae)

2021 ◽  
Vol 20 (1) ◽  
pp. 37-52
Author(s):  
Bruna Guarabyra ◽  
Andressa M. Bezerra ◽  
André Fonseca Antunes ◽  
Sergio P. Carvalho-e-Silva
Keyword(s):  
Reproductive Biology ◽  
Southeastern Brazil ◽  
Sexually Dimorphic ◽  
Tree Frog ◽  
Ecological Interactions ◽  
Parasitic Interactions ◽  
Egg Brooding

Aspects of the diet, reproduction, and interactions with other taxa are reported for the egg-brooding tree frog, Fritziana goeldii, an endemic phytotelma-dwelling species from southeastern Brazil. A total of 56 frogs (48 males; 8 females) was collected between December 2018 and November 2019. A total of 218 dietary items, representing at least 28 taxa was recovered. Hymenoptera and Coleoptera were the most abundant, mainly early in the year (January–April), with Formicidae being the most represented group. Parasitic interactions with ostracods and helminths were observed in 12 and 13 frogs, respectively, with most of these organisms being found in the intestines of F. goeldii. Fritziana goeldii is sexually dimorphic, with females (mean 36.0 mm) being larger than males (mean 28.3 mm). All females collected had oocytes, and two also had eggs attached to the dorsum. No relation was found between the female’s size and size and number of oocytes. The reproduction of F. goeldii seems to be prolonged, with males calling throughout the year.

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