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10 results for “Sperm behaviour”
Behavioural observations and sperm counts of Lissopimpla excelsa (deceived by Cryptostylis)
<p>This data was collected Dec - Feb 2017/2019 as part of research on the behaviour and sperm use of the sexually deceived pollinator, <em>Lissopimpla excelsa. </em>We wanted to know whether (1) Males could become sperm depleted; (2) If males varied sperm use with each pollination event and (3) whether behaviour/morphology differed between males that did and did not live in sympatry with sexually deceptive (<em>Cryptostylis</em>) orchids.</p>
Data from: Patterns of sperm swimming behaviour depend on male mating tactic and spawning environment in chinook salmon
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Dataset accompanying: Echolocation click parameters and biosonar behaviour of the dwarf sperm whale (Kogia sima)
<p>This dataset accompanies the manuscript "Echolocation click parameters and biosonar behaviour of the dwarf sperm whale (<em>Kogia sima</em>)." All source parameters of on-axis clicks are available in MATLAB files, for both the deep water (n=46) and shallow harbour (n=870) datasets. The deep water dataset was collected using a 7-channel vertical hydrophone array in the Bahamas, and the shallow harbour dataset was collected using a single-channel recorder in South Africa. Metadeta explaining the variables are found within the MATLAB files under 'Comments'. Details on data collection, curation and analysis can be found in the Malinka et al., Kogia publication (https://jeb.biologists.org/content/224/6/jeb240689).</p> <p>For comments/questions, please contact chloe.e.malinka [at] bio.au.dk</p>
Data supporting: Molecular, behavioural and morphological comparisons of sperm adaptations in a fish with alternative mating tactics
<p>In species with alternative reproductive tactics, there is much empirical support that sneaker males have larger testes size and greater sperm numbers. However, support for higher sperm performance by sneakers is inconsistent. We used the sand goby (Pomatoschistus minutus) to test whether sperm performance differed between breeding-coloured males (small testes, but large mucus-filled sperm-duct glands; builds a nest lined with a sperm-containing mucus, provides care) and sneaker-morph males (no breeding colouration, large testes, rudimentary sperm-duct glands; no nest, no care). We compared motility (proportion motile sperm), velocity and longevity of sperm, between the two morphs. Furthermore, we compared gene expression of testes, and tested if the sperm-duct gland contents affected sperm performance, and if sperm morphometrics differed between male morphs. We found a clear difference in gene expression of testes between the male morphs with 109 transcripts differentially expressed between the morphs. Notably, several mucin genes were upregulated in breeding-coloured males and two ATP-related genes were upregulated in sneaker-morph males. There was some evidence of higher sperm velocity in sneaker-morph males, but no difference in sperm motility. Presence of the sperm-duct gland contents significantly increased sperm velocity, but equally so for the two morphs. The same was true for sperm motility although the difference was not significant. The sand goby has remarkably long-lived sperm, with only small or no decline in motility and velocity over time (5 min vs. 22 hours), but again, this was equally true for both morphs. Sperm length (head, tail, total) did not differ between morphs, and did not correlate with sperm velocity for either morph. Thus, other than a clear difference in testes gene expression, we found only modest differences between the two male morphs, confirming previous findings that high sperm performance as an adaptation to sperm competition is not a primary target of evolution.</p>
Data supporting: Molecular, behavioural and morphological comparisons of sperm adaptations in a fish with alternative mating tactics
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Data from: Cryptic choice of conspecific sperm controlled by the impact of ovarian fluid on sperm swimming behaviour
Despite evidence that variation in male-female reproductive compatibility exists in many fertilization systems, identifying mechanisms of cryptic female choice at the gamete level has been a challenge. Here, under risks of genetic incompatibility through hybridization, we show how salmon and trout eggs promote fertilization by conspecific sperm. Using in vitro fertilization experiments that replicate the gametic micro-environment, we find complete inter-fertility between both species. However, if either species' ova were presented with equivalent numbers of both sperm types, conspecific sperm gained fertilization precedence. Surprisingly, the species' identity of the eggs did not explain this cryptic female choice, which instead was primarily controlled by conspecific ovarian fluid, a semi-viscous, protein-rich solution which bathes the eggs and is released at spawning. Video-analyses revealed that ovarian fluid doubled sperm motile lifespan, and straightened swimming trajectory, behaviours allowing chemoattraction up a concentration gradient. To confirm chemoattraction, cell migration tests through membranes containing pores that approximated to the egg micropyle showed that conspecific ovarian fluid attracted many more spermatozoa though the membrane, compared with heterospecific fluid or water. These combined findings together identify how cryptic female choice can evolve at the gamete level and promote reproductive isolation, mediated by a specific chemoattractive influence of ovarian fluid on sperm swimming behaviour.
Data from: The heritability of mating behaviour in a fly and its plasticity in response to the threat of sperm competition
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Data from: Cryptic choice of conspecific sperm controlled by the impact of ovarian fluid on sperm swimming behaviour
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Data from: Temperature-induced developmental plasticity in Plodia interpunctella: reproductive behaviour and sperm length.
In both plants and animals, male gametogenesis is particularly sensitive to heat stress, to the extent that a single hot or cold day can compromise crop productivity or population persistence. In animals, heat stress during development can impact a male's ability to secure copulations and/or his post-copulatory fertility. Despite such observations, relatively few studies have examined the consequences of developmental temperature on the reproductive behaviour and physiology of individuals. Here we report for the first time the effects of developmental temperature on the phenotypic expression of both apyrene and eupyrene sperm and the copulatory behaviour of the Indian meal moth, Plodia interpunctella. We show that the length of both apyrene and eupyrene sperm decrease with increasing developmental temperature and that males are less likely to engage in copulation when reared at the highest and lowest temperatures. Where copulation occurred, the duration of copula decreased as male developmental temperature increased. We argue that identification of the mechanisms and consequences of reproductive failure in animals facing heat stress will help understand how wild and domesticated populations will respond to global climate change. We also contend that such studies will help elucidate long-standing evolutionary questions around the maintenance of genetic variation in traits highly relevant to fitness and the role of phenotypic plasticity in driving the evolution of novel traits.
Data from: Temperature-induced developmental plasticity in Plodia interpunctella: reproductive behaviour and sperm length.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.