Does reproductive success increase with age or with size in species with indeterminate growth? A case study using sand lizards (Lacerta agilis)

Oecologia ◽  
1996 ◽  
Vol 105 (2) ◽  
pp. 175-178 ◽  
Author(s):  
Mats Olsson ◽  
Richard Shine
Keyword(s):  
Reproductive Success ◽  
Indeterminate Growth ◽  
Lacerta Agilis

scholarly journals Individual Variability in Reproductive Success Determines Winners and Losers under Ocean Acidification: A Case Study with Sea Urchins

PLoS ONE ◽  
2012 ◽  
Vol 7 (12) ◽  
pp. e53118 ◽  
Author(s):  
Peter Schlegel ◽  
Jon N. Havenhand ◽  
Michael R. Gillings ◽  
Jane E. Williamson
Keyword(s):  
Reproductive Success ◽  
Ocean Acidification ◽  
Sea Urchins ◽  
Individual Variability

scholarly journals The effects of shifting vegetation mosaics on habitat suitability for coastal dune fauna—a case study on sand lizards (Lacerta agilis)

2011 ◽  
Vol 16 (1) ◽  
pp. 89-99 ◽  
Author(s):  
Bart Wouters ◽  
Marijn Nijssen ◽  
Gertjan Geerling ◽  
Hein Van Kleef ◽  
Eva Remke ◽  
...  
Keyword(s):  
Habitat Suitability ◽  
Coastal Dune ◽  
Lacerta Agilis ◽  
Vegetation Mosaics

scholarly journals Persistent Pollutants in Audouin's Gull (Larus audouinii) in the Western Mediterranean: A Case-study with Wide Implications?

1979 ◽  
Vol 6 (2) ◽  
pp. 139-142 ◽  
Author(s):  
M. F. I. J. Bijleveld ◽  
P. Goeldlin ◽  
J. Mayol
Keyword(s):  
Reproductive Success ◽  
Western Mediterranean ◽  
Organochlorine Compounds ◽  
Chemical Analyses ◽  
Persistent Pollutants ◽  
Larus Audouinii

The possibility of persistent pollutants playing an adverse role in the reproductive success of Audouin's Gull in the western Mediterranean was examined through chemical analyses of 7 eggs of this species that did not hatch. Residues of organochlorine compounds and mercury were found.The conclusion has been reached that a further increase of present levels of DDE may well lead to a decline of the reproductive success of the species in the western Mediterranean, especially in the northern part. These observations, although limited, could have implications for further species as is already indicated by other work cited.

scholarly journals Mating Systems, Reproductive Success, and Sexual Selection in Secretive Species: A Case Study of the Western Diamond-Backed Rattlesnake, Crotalus atrox

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e90616 ◽  
Author(s):  
Rulon W. Clark ◽  
Gordon W. Schuett ◽  
Roger A. Repp ◽  
Melissa Amarello ◽  
Charles F. Smith ◽  
...  
Keyword(s):  
Sexual Selection ◽  
Reproductive Success ◽  
Mating Systems ◽  
Crotalus Atrox

scholarly journals How accurately do behavioural observations predict reproductive success in free-ranging lizards?

2019 ◽  
Vol 15 (2) ◽  
pp. 20190030 ◽  
Author(s):  
Mats Olsson ◽  
Tonia S. Schwartz ◽  
Erik Wapstra ◽  
Richard Shine
Keyword(s):  
Reproductive Success ◽  
Adult Males ◽  
Microsatellite Data ◽  
Term Study ◽  
Long Term Study ◽  
Lacerta Agilis ◽  
Free Ranging ◽  
Number Of Males ◽  
Variance In Reproductive Success

Behavioural ecologists often use data on patterns of male–female association to infer reproductive success of free-ranging animals. For example, a male seen with several females during the mating season is predicted to father more offspring than a male not seen with any females. We explored the putative correlation between this behaviour and actual paternity (as revealed by microsatellite data) from a long-term study on sand lizards ( Lacerta agilis ), including behavioural observations of 574 adult males and 289 adult females, and paternity assignment of more than 2500 offspring during 1998–2007. The number of males that contributed paternity to a female's clutch was correlated with the number of males seen accompanying her in the field, but not with the number of copulation scars on her body. The number of females that a male accompanied in the field predicted the number of females with whom he fathered offspring, and his annual reproductive success (number of progeny). Although behavioural data explained less than one-third of total variance in reproductive success, our analysis supports the utility of behavioural-ecology studies for predicting paternity in free-ranging reptiles.

Sexual reproductive strategies of Puya nitida (Bromeliaceae) in a Colombian paramo, a tropical high-elevation ecosystem

2021 ◽  
pp. 1-9
Author(s):  
Alejandra Franco-Saldarriaga ◽  
María Argenis Bonilla-Gómez
Keyword(s):  
Reproductive Success ◽  
Plant Species ◽  
High Elevation ◽  
Self Incompatibility ◽  
Adaptive Responses ◽  
Annual Frequency ◽  
Reproductive Rates ◽  
Alpine Environments ◽  
Plant Mating System

Abstract The low availability of pollinators in high-elevation ecosystems can lead to flowering plants showing different adaptive responses in order to assure their reproductive success. Shifts toward autogamy and asexual reproductive rates (the reproductive assurance hypothesis) and the compensatory measures to maintain outcrossing such as flower longevity and more prolonged pistil receptivity (the increased pollination probability hypothesis) are some of these responses. Several studies have tested both hypotheses, but investigations of plants of tropical alpine environments such as paramos that support these assumptions are still scarce. Puya nitida, an endemic Colombian plant species distributed in the paramo and subparamo in the Eastern Cordillera of Cundinamarca department, was used as a case study to test its reproductive characteristics that assure its sexual reproduction. We analysed the species’ floral morphology and development, its phenological patterns and its plant mating-system. We found that Puya nitida showed floral characteristics that promote pollination by birds, herkogamy and dichogamy, flowers and receptive stigmas with 9 and 12 days of longevity, respectively and an index of self-incompatibility that shows that it is mostly self-incompatible. We found a synchronic phenological pattern with an annual frequency and an intermediate duration with a peak in the period of lowest rainfall. Our results suggested that longer floral development, prolonged stigma receptivity, herkogamy and dichogamy and self-incompatibility might assure reproductive success, since the cross-pollination might be favoured when few pollinators are in attendance. Overall, these reproductive mechanisms add evidence to the increased pollination probability hypothesis, specifically for a plant species of a tropical high-elevation ecosystem where pollinators are scarce.

Are species genetically more sensitive to habitat fragmentation on the periphery of their range compared to the core? A case study on the sand lizard (Lacerta agilis)

2016 ◽  
Vol 32 (1) ◽  
pp. 131-145 ◽  
Author(s):  
Klaus Henle ◽  
Claudia Andres ◽  
Detlef Bernhard ◽  
Annegret Grimm ◽  
Pavel Stoev ◽  
...  
Keyword(s):  
Habitat Fragmentation ◽  
The Core ◽  
Sand Lizard ◽  
Lacerta Agilis

Orchid–bird interactions: a case study from Angraecum (Vandeae, Angraecinae) and Zosterops (white-eyes, Zosteropidae) on Reunion Island

Botany ◽  
2008 ◽  
Vol 86 (10) ◽  
pp. 1143-1151 ◽  
Author(s):  
Claire Micheneau ◽  
Jacques Fournel ◽  
Laurence Humeau ◽  
Thierry Pailler
Keyword(s):  
Reproductive Success ◽  
Fruit Set ◽  
Bird Species ◽  
Probable Case ◽  
Island Populations ◽  
Song Bird ◽  
Pollen Removal ◽  
Hand Pollination ◽  
Angraecoid Orchids

Although angraecoid orchids are famous for their spectacular flowers, pollinated by hawkmoths in Madagascar, two species of Angraecum endemic to the Mascarenes (sect. Hadrangis ) have atypical unscented and short-spurred flowers that are pollinated by birds. We focused on the pollination and reproductive success of Angraecum bracteosum Balf.f. & S.Moore, a member of sect. Hadrangis. We investigated the breeding system by performing a set of hand-pollination experiments and by observing natural pollinators using video-captures. Pollinator efficiency (pollen removal and deposition) and reproductive success (fruit set) were quantified once a week in two natural island populations during three consecutive flowering seasons (2003–2005). The orchid is self-compatible but requires pollinator services to achieve reproduction. The two white-eye song-bird species (Zosteropidae) that occur on Reunion, Zosterops borbonicus Boddaert and Zosterops olivaceus  L., were recorded as pollinators. However, while pollination events were rare and occasional following flower visits by Z. borbonicus, foraging of Z. oliveaceus resulted in a high frequency of successful pollinations. White-eyes typically perched on inflorescences, and probed most of the “fresh-looking” flowers for nectar. This study documents a probable case of bird-pollination specialization within Angraecum section Hadrangis, and sheds light on the role played by pollinators during the radiation of section Hadrangis in the Mascarene Archipelago.

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