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Michael Butler Margalef

@michaelmargalef.bsky.social

PhD student in Aquatic Ecology and Conservation | University of Girona (IEA) 🐟 he/him

71 Followers  |  68 Following  |  5 Posts  |  Joined: 09.01.2025
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Posts by Michael Butler Margalef (@michaelmargalef.bsky.social)

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Las autonomías frenan la declaración de la anguila como especie en peligro Los gobiernos de las comunidades han reclamado realizar más seguimientos y tener más datos científicos antes de prohibir su pesca y consumo

Lamentable: hay info suficiente lo que falta es voluntad para afrontar problemas difíciles pero importantes. Por desgracia, los intereses económicos de unos pocos siempre pasan por los problemas ambientales de tod@s 🥲
www.elperiodico.com/es/politica/...

17.02.2026 15:07 — 👍 9    🔁 7    💬 2    📌 0
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El rotundo informe para proteger a la angula: “Existe un consenso generalizado sobre su estado crítico” El comité científico encargado de analizar el estado de esta especie en España advierte sobre la “sobrepesca”, pero Galicia y Asturias rechazan vetar su captura

elpais.com/clima-y-medi...

03.02.2026 12:14 — 👍 2    🔁 4    💬 0    📌 0
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Project SALTFISH - Emili García-Berthou Conservation biology of cyprinodontiform fishes: effects of salinity and hypoxia (SALTFISH) Project “Conservation biology of cyprinodontiform fishes: effects of salinity and hypoxia (SALTFISH)”  is a coordinated project funded by the Spanish Ministry of Science, Innovation, and Universities for the years 2024-2027 and formed by two subprojects: 1) “Conservation ecology of cyprinodontiform fishes: effects of salinity […]

With support from the #Proyecto_SALTFISH project
www.invasiber.org/GarciaBertho...

Project outreach on Bluesky: #Proyecto_SALTFISH
Funded by PID2023-146173NB-C21 / PID2023-146173NB-C22

22.01.2026 18:22 — 👍 5    🔁 2    💬 0    📌 0
Figure 3. Redundancy analysis of the seven behavioural variables (black arrows) with metabolic traits (blue arrows) as constraints in
toothcarp (see Suppl. material 3: fig. S6 for the plot for mosquitofish). Each red dot represents an individual.

Figure 3. Redundancy analysis of the seven behavioural variables (black arrows) with metabolic traits (blue arrows) as constraints in toothcarp (see Suppl. material 3: fig. S6 for the plot for mosquitofish). Each red dot represents an individual.

Metabolism–behaviour link: in toothcarp, movement was more related to baseline metabolism (SMR), with individuals with higher SMR moving less. In mosquitofish, metabolism explained little of the behavioural variation.

22.01.2026 18:21 — 👍 3    🔁 2    💬 1    📌 0
Figure 2. Box-plots of movement behavioural variables of mosquitofish (purple) and toothcarp from both sexes (yellow) pooled across
salinity treatments. Metrics include the proportion of time near edges, median speed, proportion of time stationary, median turning speed,
proportion of time sharply turning (> 45 °/s), proportion of arena visited, and the coefficient of variation (CV) of arena use.

Figure 2. Box-plots of movement behavioural variables of mosquitofish (purple) and toothcarp from both sexes (yellow) pooled across salinity treatments. Metrics include the proportion of time near edges, median speed, proportion of time stationary, median turning speed, proportion of time sharply turning (> 45 °/s), proportion of arena visited, and the coefficient of variation (CV) of arena use.

Mosquitofish spent more time moving and used space more uniformly, whereas toothcarp showed more restricted, stop–go movement, shedding light on differences in ecological strategy and invasion success.

22.01.2026 18:15 — 👍 2    🔁 2    💬 1    📌 0
Figure 1. Box-plots of metabolic responses (SMR, MMR, FAS, and AAS) for female mosquitofish (purple), female toothcarp (green),
and male toothcarp (yellow) across salinity treatments.

Figure 1. Box-plots of metabolic responses (SMR, MMR, FAS, and AAS) for female mosquitofish (purple), female toothcarp (green), and male toothcarp (yellow) across salinity treatments.

Toothcarp maintained metabolic performance across salinities, while mosquitofish showed lower aerobic performance at elevated salinity.

22.01.2026 18:09 — 👍 2    🔁 2    💬 1    📌 0

Check out our new paper on salinity effects on metabolism and movement in #invasive mosquitofish and the threatened Spanish toothcarp! Huge thanks to all the co-authors: @garciaberthou.bsky.social, @jollewjolles.bsky.social, Cesc, and Anna.🐟🔝
@greco-udg.bsky.social @iea-udg.bsky.social

22.01.2026 18:01 — 👍 12    🔁 8    💬 2    📌 1
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ShoalBase | Join, Explore, Contribute Now ShoalBase offers a global database on fish social behaviour, supporting research, conservation, and ecology through community contributions and visual data mapping.

🧵1/9 There are 35,000+ fish species, but we have formal social-behaviour classifications for a tiny fraction. Most knowledge lives in the experience of researchers, fishers, divers, aquarists, naturalists, and Indigenous communities, but almost none of it is centralised. So we built ShoalBase.org.

25.11.2025 13:10 — 👍 50    🔁 34    💬 4    📌 4
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We’re offering a fully funded 4 yr PhD position to work on Sexual selection in complex environments at the @uv.es. Co-supervised by @dbergerbiol.bsky.social. Find details below 👇

01.09.2025 13:25 — 👍 31    🔁 57    💬 0    📌 2
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📢 Us convidem a la lectura de la tesi doctoral

Integrating Ecological Complexity and Physiological Traits into Environmental Risk Assessments

Per Amina Khalid

🗓️ 5 de setembre de 2025 · 11.00 h
📍 Aula Magna, Facultat de Ciències
👉 També on-line: teams.microsoft.com/l/meetup-joi...

02.09.2025 10:47 — 👍 6    🔁 5    💬 0    📌 0

How is soil functioning shaped by aridity? 🌲🌵 We studied this along a natural aridity gradient.

📌 Microbial structure shifted with aridity, but soil functions were mainly driven by local soil properties.

📖 doi.org/10.1016/j.ap...

Huge thanks to all coauthors 🫶

17.07.2025 06:40 — 👍 7    🔁 3    💬 1    📌 0
Project “Conservation biology of cyprinodontiform fishes: effects of salinity and hypoxia (SALTFISH)” #Proyecto_SALTFISH

Project “Conservation biology of cyprinodontiform fishes: effects of salinity and hypoxia (SALTFISH)” #Proyecto_SALTFISH

Successful kick-off meeting of #Proyecto_SALTFISH last Friday at @mncn-csic.bsky.social @csic.es. @mncn-csic.bsky.social @greco-udg.bsky.social @iea-udg.bsky.social @michaelmargalef.bsky.social @shaunkillen.bsky.social
@ana-franco.bsky.social @carolinammuniz.bsky.social

20.02.2025 08:55 — 👍 10    🔁 6    💬 2    📌 0