scholarly journals Reproductive Biology of Two Sympatric Species of Polyalthia (Annonaceae) in Sri Lanka. I. Pollination by Curculionid Beetles

2006 ◽  
Vol 167 (3) ◽  
pp. 483-493 ◽  
Author(s):  
R. M. C. S. Ratnayake ◽  
I. A. U. N. Gunatilleke ◽  
D. S. A. Wijesundara ◽  
R. M. K. Saunders
Keyword(s):  
Sri Lanka ◽  
Reproductive Biology ◽  
Sympatric Species

scholarly journals Reproductive Biology of Two Sympatric Species ofPolyalthia(Annonaceae) in Sri Lanka. II. Breeding Systems and Population Genetic Structure

2006 ◽  
Vol 167 (3) ◽  
pp. 495-502 ◽  
Author(s):  
R. M. C. S. Ratnayake ◽  
Y. C. F. Su ◽  
I. A. U. N. Gunatilleke ◽  
D. S. A. Wijesundara ◽  
R. M. K. Saunders
Keyword(s):  
Genetic Structure ◽  
Sri Lanka ◽  
Reproductive Biology ◽  
Population Genetic Structure ◽  
Population Genetic ◽  
Sympatric Species ◽  
Breeding Systems

Reproductive Biology and Floral Phenologies of the Sympatric Species Leptospermum myrsinoides and L. continentale (Myrtaceae)

1993 ◽  
Vol 41 (5) ◽  
pp. 527 ◽  
Author(s):  
SP Obrien ◽  
DM Calder
Keyword(s):  
Flowering Time ◽  
Genetic Control ◽  
Reproductive Biology ◽  
Pollen Viability ◽  
Sympatric Species ◽  
Anther Dehiscence ◽  
Floral Structure ◽  
Days After Anthesis ◽  
Degree Of Overlap

The reproductive biology and floral phenologies of co-occurring Leptospermum myrsinoides and L. continentale were investigated. Both species have similar floral structure and both are protandrous. Anther dehiscence is staggered over approximately 6 days and pollen viability remains high for at least 3 days. The styles of both species are short at anthesis but extend during the next 6 days to approximately the same height as the anthers. The stigmas of these species do not achieve maximum receptivity until at least 4 days after anthesis. Both species are self-compatible. At the three sites studied, L. myrsinoides and L. continentale have separate flowering times with L. myrsinoides always flowering first. Within populations of each species, plants reached first flower and peak flower in the same order in 1989 and 1990, implying genetic control over flowering time. It is suggested that protandry in these species enhances the likelihood of outcrossing and the staggered release of pollen coupled with the degree of overlap within flowering populations increases the number of potential mates available to each flower.

Reproductive biology of two sympatric colubrid snakes, Chironius flavolineatus and Chironius quadricarinatus, from the Brazilian Cerrado domain

2010 ◽  
Vol 31 (4) ◽  
pp. 463-473 ◽  
Author(s):  
Roberta Richard Pinto ◽  
Otavio Augusto Vuolo Marques ◽  
Ronaldo Fernandes
Keyword(s):  
Reproductive Biology ◽  
Sexual Maturity ◽  
Egg Production ◽  
Sympatric Species ◽  
Egg Laying ◽  
Reproductive Pattern ◽  
Brazilian Cerrado ◽  
Wet Season ◽  
Reproductive Cycles ◽  
First Time

AbstractThe reproductive biology of Chironius flavolineatus and C. quadricarinatus from the Brazilian Cerrado domain is described, including sexual maturity, female fecundity, and reproductive cycles of males and females. Egg-laying is recorded here for the first time for C. quadricarinatus. Males of both species attain sexual maturity with a smaller snout-vent length than females. Females of C. flavolineatus have an extended reproductive cycle with egg production during the wet season, whereas males exhibit year-round sperm production. Chironius quadricarinatus has continuous reproductive cycles in both sexes. Differences in reproductive pattern between these two sympatric species are probably related to phylogenetic constraints on intrageneric lineages of Chironius.

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