Discover and read the best of Twitter Threads about #turtletuesday

Most recents (7)

Welcome to my #TurtleTuesday #SeaTurtleTalk! Search these hashtags to find other amazing "talks" from the sea 🐢 community! My talk is about my recent paper “Incongruent long-term trends of a marine consumer and primary producers in a habitat affected by nutrient pollution” (1/8)
Nutrient pollution (excess nutrients from human activities) affects coastal ecosystems and primary producers (📸from Kennish 2010). But effects on sea 🐢 are mostly unknown. My co-authors & I used 18-yr dataset from the Indian River Lagoon (IRL) in FL to study this topic. (2/8)
Specifically, we studied juvenile green 🐢 abundance and growth, seagrass cover, and macroalgae cover from 2001-2018. (Macroalgae is basically seaweed, in case you are confused by that term!) Over this time period, the IRL was continually impacted by nutrient pollution. (3/8)
Read 9 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
1/7 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
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

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