Dan Ovando

The MPA Guide

People can disagree about minimum standards for MPAs, or what level of protection a given MPA should have, but bottom trawling isn’t inherently inconsistent with currently applied definitions of MPAs that allow for a range of protection levels and objectives.

20.05.2025 23:56 — 👍 0    🔁 0    💬 0    📌 0

Graphic from Grorud-Colvert et al. 2021, showing different levels of activity that might be allowed under different degrees of MPA protection

Would caveat it can depend on the purpose of the MPA. e.g. some types of bottom trawling might be consistent with an MPA focused on protecting non-benthic features; It might be a minimally protected MPA, but still an MPA, e.g as defined by MPA Guide (mpa-guide.protectedplanet.net/resources)

20.05.2025 23:56 — 👍 0    🔁 0    💬 1    📌 0

This image shows a plot of changes in fish catches on the y axis and fish biomass on the x axis resulting from closing 20-40% of an area in a no-take MPA. The graph shows that it is possible for MPAs to produce in terms of catch and conservation impacts "win wins", "win-lose", "lose-win", and "lose-lose" depending on the state of nature

using our model, results of hundreds of simulations of #MPA networks covering 20-40% of a seascape with multiple species varying bio-economic parameters like the amount of habitat overlap across species. ~ same size #MPA can produce wildly different outcomes depending on state of the world #30x30 🦑🌎

15.12.2023 20:06 — 👍 10    🔁 0    💬 0    📌 0

Simulation of Marine Social-Ecological Systems Fast simulation of marine fauna and fisheries. Runs multiple (independent) age structured species simultaneously in 2D

You can check out the package at danovando.github.io/marlin/, and the paper here onlinelibrary.wiley.com/doi/10.1111/.... message me for a copy or if you have any questions. More research using the `marlin` model coming soon, and feel free to use it in your own studies! 🦑🌎

15.12.2023 19:59 — 👍 4    🔁 1    💬 0    📌 0

Simulating benefits, costs and trade‐offs of spatial management in marine social‐ecological syst... Fish and Fisheries is an interdisciplinary journal covering fish biology, fisheries and aquaculture – from molecular biology & genetics to behavior & conservation.

Trying out scicomm on bluesky! New paper out in Fish & Fisheries, "Simulating benefits, costs, and trade-offs of spatial management in marine social-ecological systems" onlinelibrary.wiley.com/doi/10.1111/... from myself and a great team of scientists from
NOAA Fisheries UCSB's emLab 🦑🌎

15.12.2023 19:58 — 👍 15    🔁 3    💬 0    📌 0

trying this place out, can you add me as a contributor? Thanks! @ethanfreedman.bsky.social

14.12.2023 17:07 — 👍 0    🔁 0    💬 0    📌 0

#addOcean Thanks for organizing, giving this bluesky thing a try!

14.12.2023 17:05 — 👍 2    🔁 0    💬 0    📌 0

Dan Ovando

Dan Ovando, scientist at the Inter-American Tropical Tuna Commission, trying out this bluesky thing! www.iattc.org/en-US/About/...

14.12.2023 17:04 — 👍 1    🔁 0    💬 1    📌 0

The collapse of eastern Bering Sea snow crab A marine heatwave precipitated the collapse of the eastern Bering Sea snow crab population.

long-term data collection, statistical modeling, and subject matter expertise reveals marine heatwave as the main driver in the historic Bering Sea snow crab collapse. Impressive and important work by a great team! www.science.org/doi/10.1126/...

24.10.2023 18:43 — 👍 0    🔁 0    💬 0    📌 0

Weird Fishes - Fisheries, Oceans, and Data Science A blog of Fisheries and Data Science - Future Imperfect theme ported by Julio Pescador

Introducing myself to the community over here! I'm a quantitative fisheries scientist at the Inter-American Tropical Tuna Commission. I study stock assessment (data-limited mostly), social-ecological systems, spatial management and other fun stuff. Tutorials and posts over at www.weirdfishes.blog

24.10.2023 18:36 — 👍 8    🔁 1    💬 0    📌 0