Discover and read the best of Twitter Threads about #Sesh1

Most recents (5)

I’ve been privileged to work with #CitizenScience data in #ornithology for many years at @_BTO and @CornellBirds. I’ve seen some of the amazing opportunities and the tricky challenges that come with citizen science data.

1/15 #BOUasm22 #Sesh1 Image
#Ornithology has a long history of #CitizenScience, enabling us to calculate population status for birds over many decades. For example, @_BTO’s data for Herons goes back to 1928!

2/15 #BOUasm22 #Sesh1 Image
One of the most important #CitizenScience projects in the UK, the Breeding Bird Survey @BBS_birds has allowed us to monitor which bird populations are decreasing and increasing over time.

3/15 #BOUasm22 #Sesh1 Image
Read 16 tweets
1 #BOUsci21 #Sesh1 // If you’ve read somewhere that UK bird species are increasing or decreasing, chances are that information has come from the UK Breeding Bird Survey. @BBS_birds is run by BTO in partnership with JNCC and RSPB. #BTOscience Image
2 #BOUsci21 #Sesh1 // Since 1994, a loyal team of skilled volunteers has surveyed a stratified random sample that has grown to >4000 1-km squares. Twice each spring, they count birds along transects and assign them to distance bands to assess detectability #BTOscience
3 #BOUsci21 #Sesh1 // From these data we produce population trends for around 50% of UK breeding bird species. These account for over 95% of all individual birds in the UK, so BBS tells us a lot about our bird populations: #BTOscience Image
Read 11 tweets
1/6 #UEACEEC21 #Sesh1
Salmon usually return to their natal streams to spawn, presenting a risk of breeding between close genetic relatives.
By reducing heterozygosity, #inbreeding can deplete the genetic variability of a population, affecting offspring fitness and survival Image
2/6 #UEACEEC21 #Sesh1
However, #salmons are externally fertilisers and females are polyandrous. So how do females control #fertilisation when this occurs outside of their bodies?
Can they somehow hamper fertilisation from their siblings?#evolution may have allowed such mechanisms Image
3/6 #UEACEEC21 #Sesh1
To test this, we analysed #spermmotility in sibling vs non-sibling ovarian fluid, a substance released with eggs and involved in #sexualselection in #fish. Then, we compared #fertility & hatch rates between sib vs non-sib crosses after #invitro fertilisation Image
Read 6 tweets
1 #ISTC20 #Sesh1 #ornithology Hello everyone. Thanks for the organizer of ISTC and Ryan. You can find my detailed information at…. It’s my great honor to share the study of my team on shorebirds and their habitats in the Yellow Sea in China.
2 #ISTC20 #Sesh1 Migratory shorebirds depend on the linkage of breeding, nonbreeding, and stopover sites between them to maintain their population. The Yellow Sea (YS) region provides critical stopover sites for migratory shorebirds in the East Asian-Australasian Flyway (EAAF).
3 #ISTC20 #Sesh1 The Yellow Sea (YS), including Bohai Bay in the northwest, is surrounded by Chinese mainland and Korea Peninsular. It has the largest tidal wetland (more than 10,000 km2) worldwide.
Read 22 tweets

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