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Data from: Condition-dependent expression of pre- and postcopulatory sexual traits in guppies
- 负责人：
- DOI：
- doi:10.5061/dryad.2v68d
- 摘要：
- Female choice can impose persistent directional selection on male sexually selected traits, yet such traits often exhibit high levels of phenotypic variation. One explanation for this paradox is that if sexually selected traits are costly, only the fittest males are able to acquire and allocate the resources required for their expression. Furthermore, because male condition is dependent on resource allocation, condition dependence in sexual traits is expected to underlie trade-offs between reproduction and other life-history functions. In this study we test these ideas by experimentally manipulating diet quality (carotenoid levels) and quantity in the guppy (Poecilia reticulata), a livebearing freshwater fish that is an important model for understanding relationships between pre- and post-copulatory sexually selected traits. Specifically, we test for condition dependence in the expression of pre- and postcopulatory sexual traits (behavior, ornamentation, sperm traits) and determine whether diet manipulation mediates relationships among these traits. Consistent with prior work we found a significant effect of diet quantity on the expression of both pre- and postcopulatory male traits; diet-restricted males performed fewer sexual behaviors and exhibited significant reductions in color ornamentation, sperm quality, sperm number, and sperm length than those fed ad libitum. However, contrary to our expectations, we found no significant effect of carotenoid manipulation on the expression of any of these traits, and no evidence for a trade-off in resource allocation between pre- and postcopulatory episodes of sexual selection. Our results further underscore the sensitivity of behavioral, ornamental, and ejaculate traits to dietary stress, and highlight the important role of condition dependence in maintaining the high variability in male sexual traits.
Data from: Blood transcriptomes and de novo identification of candidate loci for mating success in lekking great snipe (Gallinago media)
- 负责人：
- DOI：
- doi:10.5061/dryad.p42r8
- 摘要：
- and its interaction with specific genes may thus affect performance on the lek.
GBIF Occurrence Download
- 负责人：
- DOI：
- doi:10.15468/dl.wrbnbu
- 摘要：
- Ontario Museum. 28 records from RSPB - Black grouse lek survey in Moray and Nairn 2009 (RSPB). 26152 records from Herts Bird Club - Hertfordshire Breeding
Data from: Meteorological conditions influence short-term survival and dispersal in a reinforced bird population.
- 负责人：
- 关键词：
- captive-breeding reinforcement translocation lek mating bustard trap-dependence ESURGE natal dispersal
- DOI：
- doi:10.5061/dryad.3523q
- 摘要：
- A high immediate mortality rate of released animals is an important cause of translocation failure (“release cost”). Post-release dispersal (i.e. the movements from the release site to the first breeding site) has recently been identified as another source of local translocation failure. In spite of their potential effects on conservation program outcomes, little is known about the quantitative effects of these two sources of translocation failure and their interactions with environmental factors and management designs. Based on long-term monitoring data of captive-bred North African houbara bustards Chlamydotis undulata undulata (hereafter, houbara) over large spatial scales, we investigated the relative effects of release (e.g. release group size, period of release), individual (e.g. sex and body condition) and meteorological (e.g. temperature and rainfall) conditions on post-release survival (N = 957 individuals) and dispersal (N = 436 individuals). We found that (i) rainfall and ambient air temperature had, respectively, a negative and a positive effect on houbara post-release dispersal distance, (ii) in interaction with the release period, harsh meteorological conditions had negative impact on the survival of houbara, (iii) density-dependent processes influenced the pattern of departure from the release site and (iv) post-release dispersal distance was male-biased, as natal dispersal of wild birds (although the dispersal patterns and movements may be influenced by different processes in captive-bred and in wild birds). Synthesis and applications. Our results demonstrate that post-release dispersal and mortality costs in translocated species may be mediated by meteorological factors, which in turn can be buffered by the release method. As the consequences of translocation programs on population dynamics depend primarily upon release costs and colonisation process, we suggest that their potential interactions with meteorological conditions must be carefully addressed in future programs (i) through monitoring of short-term post-release mortality to understand its link with environmental conditions; (ii) by carefully choosing the season of release to minimize exposition of inexperienced individuals to harsh conditions and (iii) generalising the use of long-term weather forecast to adapt release effort and staggering releases over several years to buffer meteorological effects.
Data from: Extreme site fidelity as an optimal strategy in an unpredictable and homogeneous environment
- 负责人：
- DOI：
- doi:10.5061/dryad.7c834db
- 摘要：
- tively homogeneous environment, the lack of benefits and likely costs to moving across landscape patches and leaving known lek and breeding/brooding ar
