Discover and read the best of Twitter Threads about #SeaTurtleTalks

Most recents (13)

Welcome to the last tweet in #SeaTurtleTalks
"Oxidative stress: a cost to arribada nesting in olive ridley sea turtles"
I'm Gabriela Arango, PhD candidate in the @JPVM_lab at the @berkeleyIB in UCB. Interested on 🐢💚
✅Oxidative stress
✅Hypoxia Image
Ridleys exhibit a polymorphic nesting behavior:
Solitary = alone 🐢😕
Arribada = thousands of turtles nesting at once 🐢🐢🐢🐢🤩
Arribadas may provide fitness benefits 🧐 (i.e. mate finding or predator satiation), but the potential costs of arribada nesting remain understudied Image
What we wanted: To explore the potential trade-offs of the fitness benefits associated with arribada nesting Image
Read 7 tweets
1/7 Hello everyone, my name is Tabitha Siegfried and I am very excited to be presentations on my research “Validating the use of stereo-video camera to conduct remote measurements of sea turtles" for #SeaTurtleTalks
2/7 Stereo-video camera systems (SVCS) are a promising tool to remotely measure body size of wild animals without the need for animal handling. In this study we assessed the accuracy of SVCSs for measuring the straight carapace of sea turtles.
3/7 To achieve this, we hand captured and measured 63 individuals. Upon releasing these captured turtles we filmed them with the SVCS. We then compared the hand captured measurements to measurements extracted via the SVCS.
Read 7 tweets
#SeaTurtleTalks: Trends in Florida sea turtle size at maturity

Located on the east coast of Florida, USA, the Archie Carr National Wildlife Refuge hosts tens of thousands of sea turtle nests every year. It’s an ideal site to study population trends.

#TurtleTuesday 🌊🐢
The #UCFTurtleLab has been monitoring sea turtles in 21 km of the #ArchieCarrNWR since the early 1980s.

Loggerhead nest counts have been fairly consistent over time, while green turtle nests have increased.
We use calipers to measure nesting sea turtles at night.

Our crew noticed that small turtles seemed to be more common, so we decided to look at the data.

#longtermdata #fieldwork #UCFTurtleLab
Read 7 tweets
1/7 #SeaTurtleTalks

"Stranded turtle bones reveal divergent life-history characteristics for critically #endangered #hawksbill #seaturtles inhabiting US waters"

Sometimes🐢wash ashore (strand) dead. Let's talk about what their🦴can tell us about their past life. #TurtleTuesday
Global #hawksbill pops. declined >80% in the past 100yr. Study of immature🐢was recently identified as🌎priority. Hawksbills typically inhabit🌴coral reefs but juveniles also forage in subtropical US waters➡️Texas & Florida. Yet, little is known about their ecology in the US
To address this knowledge gap, we studied the growth layers, #stableisotopes & #traceelements in the🦴of 94 US-stranded turtles (1989–2012). This led to new data on:
1⃣ stage duration (oceanic vs. neritic)
2⃣ size-at-age relationships
3⃣ age-at-maturation
4⃣ growth rates
Read 8 tweets
1/6 #SeaTurtleTalks🐢Have you seen #seaturtles in the water? @iseaturtle is a #CitizenScience app that allows you to participate in #seaturtle research/conservation! Follow this🧵to learn more about this initiative with @icer182 @SeaTurtles_org @calhoun_marine & @PamelaPlotkin! A sea turtle swimming on th...
2/6 Since the 1990s, the number of sea turtles in Texas (🇺🇸) waters has increased significantly, but many aspects of their spatial distribution and ecology in the bays remain poorly understood🤔🐢🗺 This is a cartoon. The firs...
3/6 As🐢numbers increased all across #Texas bays, so did the interest of the local community in sea turtles and their conservation. In 2020, we launched @iseaturtle as a platform to encourage and involve citizens to contribute to #seaturtle science this is a screenshot of the...
Read 6 tweets
1/7 Evidence for the independent evolution of visual perception during seafinding by hatchling leatherback sea turtles (Dermochelys coriacea) 🐢#SeaTurtleTalks #TurtleTuesday
2/7 Hatchling sea turtles crawl toward the lowest and brightest horizon when they emerge from nests at night #seafinding. Differences in spectral sensitivities driven by different life histories could lead to the independent evolution of this innate behavior. #SeaTurtleTalks
3/7 Leatherback sea turtles are the largest and most distantly related extant sea turtle species. They are uniquely deep-diving, pelagic across all life stages, and forage exclusively on gelatinous zooplankton making their visual environment quite distinct. #SeaTurtleTalks
Read 7 tweets
3/6 #SeaTurtleTalks #TurtleTuesday
We’ve analysed scientific literature (181 publications) for all time range in the main databases. For each publication we obtained:
-📆Year of publication
-👩‍🔬Number of authors and their nationality
-🏝️Study area
-🔬Research topic
4/6 #SeaTurtleTalks #TurtleTuesday
-The number of authors per paper inc📈over⏱️
-The islands with⬆️publications are Boa Vista, Sal, and Maio
-Link between NGOs settlement and scientific output
5/6 #SeaTurtleTalks #TurtleTuesday
Presence of 5 species but ≠ researched.
🟦High interest in some topics, coinciding with global trends➡️ Conservation✅and breeding biology🥚
🟧Information gaps: logistical challenges of sampling in 🐢(oceanic stage, long cycle life...)
Read 4 tweets
Instant Sighting Sharing Helps Prevent Vessel Strikes on Sea Turtles

Mysticetus is the leading technology (apps + cloud + reports) used by Protected Species Observers (PSO/MMO) to localize, track, record and report on animal sightings, GPS tracks, and effort.
2/7 #SeaTurtleTalks
Mysticetus instantly shares all animal sightings amongst nearby PSOs. These tweets are an actual example (anonymized) of PSOs redirecting another boat around a leatherback turtle
Ship A and B are steaming north in rough Bft 6 seas - it is hard to see anything
3/7 #SeaTurtleTalks
PSOs on Ship A spot a leatherback turtle 20m off their starboard bow. They plot the animal in the Mysticetus app, which displays it for them as they go by.
Read 7 tweets
1/7 #SeaTurtleTalks
A mechanism for compensatory growth in Thalassia testudinum meadows under cultivation #grazing by green turtles 🐢🌱
Green #seaturtle populations are recovering, resulting in ecosystem-wide shifts as #seagrass meadows are returned to a natural grazed state. A juvenile green turtle swims above a grazed area in a Carib
2/7 The green turtle grazing strategy, with long-term cultivation of meadows (see photo) and high foraging site fidelity, is distinct from other terrestrial and aquatic mega-herbivores, and may affect seagrass compensatory (i.e. stimulated) growth responses. A border of a grazed (left) and ungrazed (right) area in a C
3/7 In a Caribbean seagrass ecosystem, we identify a mechanism for compensatory growth responses to grazing by evaluating relationships between T. testudinum morphology and growth, in situ grazing intensity, and canopy light dynamics in grazed and ungrazed areas. Figure summary showing that light availability at canopy hei
Read 7 tweets
1/5 #SeaTurtleTalks #TurtleTuesday Ex-situ #conservation in hatcheries is a successful strategy for the recovery of sea turtle populations; but alters biological systems important for hatchling survival. We assessed the effect of ex-situ management on the IIR in olive ridley
2/5 The innate immune response (IIR) was evaluated by spleen histology and the heterophile/lymphocyte ratio. Additionally, morphometry was performed, gonadal sex was determined and sand temperature was recorded during the incubation period.
3/5 Hatchlings from ex-situ nests were heavier, larger and showed a greater spleen-somatic index. They also showed more and better defined periarteriolar lymphoid sheaths (PALS), as well as a higher H/L ratio than those from in-situ nests.
Read 5 tweets
1/7 #SeaTurtleTalks #TurtleTuesday

Using a relational values lens to explore community participation in sea turtle conservation in Tanzania 🇹🇿

Hello! I’m a PhD student at @DICE_Kent. Today I’ll be tweeting about my research on the human dimensions of #SeaTurtle conservation.
2/7 #SeaTurtleTalks

Local communities have been leading #SeaTurtle conservation in 🇹🇿 since 2001.

20 yrs of monitoring at 🇹🇿 largest #GreenTurtle rookery shows:
⬆️ nest numbers inc by 40% 📈👏
⬇️ harvesting of eggs dec by 88% 📉👏
⬆️ hatchling production inc by 60% 📈👏
3/7 #SeaTurtleTalks

But 🐢 conservation in 🇹🇿 generates limited 💰 for people + opportunity cost of forgoing access to turtle eggs & meat

So why conserve 🐢?
We used a #RelationalValues (RV) lens to explore stewardship motivations & experiences of conservation participation
Read 7 tweets
1/7 #SeaTurtleTalks
Automatic identification of immature green turtle behavior from accelerometer reveals key marine conservation area in the Caribbean

Accelerometer records animal movement & body posture. Signal interpretation can be difficult & limits its use on #seaturtle
2/7 We deployed multi-sensor recorders (accelerometer, gyroscope and time-depth recorder) combined with animal-borne video-recorder to validate the signal on immature green turtles in Martinique.
3/7 From labelled signals, we trained a #deeplearning algorithm, #Vnet, to automatically identify green turtle #behavior.

🚩High ability to detect behaviors with low discriminative signals such as Feeding and Scratching, and precision down to one centi-second. #rblt
Read 7 tweets

Vessel strikes are a significant threat to sea turtles. Today I will be tweeting about the work I conducted with @natuula @mattware_phd and @zedtweetz on conservation interventions to reduce vessel strikes on sea turtles, funded by @NFWF #SeaTurtleTalks 🚤 + 🐢 = 😟 1/7
@natuula @mattware_phd @zedtweetz @nfwf 2/7

Targeted conservation strategies are needed to reduce vessel strikes on sea turtles, and successful integration of stakeholder perspectives is necessary for conservation success. To identify potential strategies, we conducted a multi-step approach. 2/7
@natuula @mattware_phd @zedtweetz @nfwf 3/ 7

First, we conducted a workshop with experts to identify challenges and opportunities related to potential interventions that could be used to reduce sea turtle vessel strikes in Florida. 🐢🐢🐢🐢🚤🚤 3/7 3/7
Read 7 tweets

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