Ignasi Nuez, Dr.
@ignasinr14.bsky.social
Shark scientist. Looking into the biological & ecological traits of sharks and their interactions with fisheries. Strong focus on bluntnose sixgill sharks in the Mediterranean Sea. At @ub.edu @marinemegafauna.bsky.social
Our new research paper is out. We found microplastic ingestion by the blackmouth catshark (Galeus melastomus) in the canyoned continental margins of the Gulf of Lion was high, more than in other parts of the Mediterranean and was influenced by the role of those canyoned margins. Full thread 👇🏻🦈
📊 Over 80% of the specimens had ingested microplastics — mostly PET and cellophane fibres, the kind found in countless everyday products.
Even more than in sharks from other Mediterranean areas like the Tyrrhenian, Ligurian or Balearic seas. Why?
Even more than in sharks from other Mediterranean areas like the Tyrrhenian, Ligurian or Balearic seas. Why?
August 4, 2025 at 2:19 PM
Our new research paper is out. We found microplastic ingestion by the blackmouth catshark (Galeus melastomus) in the canyoned continental margins of the Gulf of Lion was high, more than in other parts of the Mediterranean and was influenced by the role of those canyoned margins. Full thread 👇🏻🦈
Reposted by Ignasi Nuez, Dr.
Cutting teeth probably let smaller sharks get higher in the food web than those with grasping teeth. Awesome stable isotope study led by fabulous PhD graduate Sabrina Riveron!
@griffith.edu.au
onlinelibrary.wiley.com/doi/10.1002/...
@griffith.edu.au
onlinelibrary.wiley.com/doi/10.1002/...
Shearing Tooth Morphology May Allow Sharks to Access Higher Trophic Levels at Smaller Sizes
Predator morphology imposes limitations on prey selection due to biomechanical constraints, making some prey functionally inaccessible and thereby constraining predator trophic niches. We assessed ho....
onlinelibrary.wiley.com
August 2, 2025 at 10:49 AM
Cutting teeth probably let smaller sharks get higher in the food web than those with grasping teeth. Awesome stable isotope study led by fabulous PhD graduate Sabrina Riveron!
@griffith.edu.au
onlinelibrary.wiley.com/doi/10.1002/...
@griffith.edu.au
onlinelibrary.wiley.com/doi/10.1002/...
We’ve recently finished our #Bocadolça project, the main aim of which was to determine presence and seasonality of the bluntnose sixgill shark (Hexanchus griseus) in the deep waters off Catalonia (NW Mediterranean). @manelgazo.bsky.social (1/3)
July 25, 2025 at 7:34 PM
We’ve recently finished our #Bocadolça project, the main aim of which was to determine presence and seasonality of the bluntnose sixgill shark (Hexanchus griseus) in the deep waters off Catalonia (NW Mediterranean). @manelgazo.bsky.social (1/3)
Reposted by Ignasi Nuez, Dr.
May 9, 2025 at 9:15 AM
Yesterday, an unfortunate 7m-long basking shark (Cetorhinus maximus) was caught by trammel nets in Port de la Selva (NE Spain), close to shore. Sightings of this species start to be more frequent along the Catalan Coast at this time of the year, likely driven by ++[phytoplankton] in the region.
April 11, 2025 at 5:47 PM
Yesterday, an unfortunate 7m-long basking shark (Cetorhinus maximus) was caught by trammel nets in Port de la Selva (NE Spain), close to shore. Sightings of this species start to be more frequent along the Catalan Coast at this time of the year, likely driven by ++[phytoplankton] in the region.
Reposted by Ignasi Nuez, Dr.
New study shows that #SouthernOcean #warming plays a greater role than #Arctic Ocean warming in shifting tropical #rainfall in a future climate, increasing rainfall in #Brazil and enhancing #drought risk in the #Sahel. www.nature.com/articles/s41...
The greater role of Southern Ocean warming compared to Arctic Ocean warming in shifting future tropical rainfall patterns - Nature Communications
This study uses climate models and shows that Southern Ocean warming plays a greater role than Arctic Ocean warming in shifting tropical rainfall in a future climate, increasing rainfall in Brazil and...
www.nature.com
April 2, 2025 at 8:02 AM
New study shows that #SouthernOcean #warming plays a greater role than #Arctic Ocean warming in shifting tropical #rainfall in a future climate, increasing rainfall in #Brazil and enhancing #drought risk in the #Sahel. www.nature.com/articles/s41...
Reposted by Ignasi Nuez, Dr.
Cognitive perception of circulating oxygen in seals is the reason they don’t drown 🦑🌎🧪🦭 www.science.org/doi/10.1126/...
Cognitive perception of circulating oxygen in seals is the reason they don’t drown
Marine mammals rely on maintaining sufficient blood oxygen levels while diving to prevent drowning. Generally, oxygen is cognitively imperceptible to mammals that instead sense rising carbon dioxide a...
www.science.org
March 21, 2025 at 1:49 AM
Cognitive perception of circulating oxygen in seals is the reason they don’t drown 🦑🌎🧪🦭 www.science.org/doi/10.1126/...
Reposted by Ignasi Nuez, Dr.
Important paper shows white shark reproductive population in eastern Australia might be as few as 500 adults... challenges the idea that shark populations are "exploding"
onlinelibrary.wiley.com/doi/pdf/10.1...
onlinelibrary.wiley.com/doi/pdf/10.1...
Genomic Assessment of Australian White Sharks (Carcharodon carcharias) Challenges Previous Evidence of Population Subdivision
Aim The white shark (Carcharodon carcharias) is one of the world's largest and most recognisable marine predators but has suffered significant declines since the mid-twentieth century. Conservation ...
onlinelibrary.wiley.com
March 1, 2025 at 9:09 AM
Important paper shows white shark reproductive population in eastern Australia might be as few as 500 adults... challenges the idea that shark populations are "exploding"
onlinelibrary.wiley.com/doi/pdf/10.1...
onlinelibrary.wiley.com/doi/pdf/10.1...
New research by Colloca et al. found that the average contribution of elasmobranchs to the total annual landings of EU fisheries operating in the Mediterranean Sea from 2013 to 2022 was, in economic value...
0.60%.
link.springer.com/article/10.1...
0.60%.
link.springer.com/article/10.1...
Assessing the relevance of sharks and rays for Mediterranean EU fisheries to support a transition from species exploitation to species conservation - Reviews in Fish Biology and Fisheries
Ten years (2013–2022) of official data on elasmobranchs landed and discarded by European fishing fleets operating in the Mediterranean Sea were analysed with the primary objective of assessing the sig...
link.springer.com
December 30, 2024 at 12:41 PM
New research by Colloca et al. found that the average contribution of elasmobranchs to the total annual landings of EU fisheries operating in the Mediterranean Sea from 2013 to 2022 was, in economic value...
0.60%.
link.springer.com/article/10.1...
0.60%.
link.springer.com/article/10.1...
Reposted by Ignasi Nuez, Dr.
Reposted by Ignasi Nuez, Dr.
To set up a protocol for the release of accidentally captured bluntnose sixgill sharks 🦈…. the key is to listen and learn from the experts.
A huge thank you for your time and knowledge, skippers!
Projecte #Bocadolça @marinemegafauna.bsky.social @irbio-ub.bsky.social @ub.edu @ignasinr14.bsky.social
A huge thank you for your time and knowledge, skippers!
Projecte #Bocadolça @marinemegafauna.bsky.social @irbio-ub.bsky.social @ub.edu @ignasinr14.bsky.social
December 13, 2024 at 8:46 PM
To set up a protocol for the release of accidentally captured bluntnose sixgill sharks 🦈…. the key is to listen and learn from the experts.
A huge thank you for your time and knowledge, skippers!
Projecte #Bocadolça @marinemegafauna.bsky.social @irbio-ub.bsky.social @ub.edu @ignasinr14.bsky.social
A huge thank you for your time and knowledge, skippers!
Projecte #Bocadolça @marinemegafauna.bsky.social @irbio-ub.bsky.social @ub.edu @ignasinr14.bsky.social
Reposted by Ignasi Nuez, Dr.
The wave of rising shark & ray extinction risk #GlobalSharkTrends
👉 started in rivers, estuaries, nearshore coastal waters
👉 before rapidly expanding out across the oceans.
Lower risk only in harder-to-fish nearshore habitats, ie,
👉 Kelp/algal reefs
👉 Rocky reefs, &
👉 Deepsea
🧵10/20
👉 started in rivers, estuaries, nearshore coastal waters
👉 before rapidly expanding out across the oceans.
Lower risk only in harder-to-fish nearshore habitats, ie,
👉 Kelp/algal reefs
👉 Rocky reefs, &
👉 Deepsea
🧵10/20
December 5, 2024 at 10:05 PM
The wave of rising shark & ray extinction risk #GlobalSharkTrends
👉 started in rivers, estuaries, nearshore coastal waters
👉 before rapidly expanding out across the oceans.
Lower risk only in harder-to-fish nearshore habitats, ie,
👉 Kelp/algal reefs
👉 Rocky reefs, &
👉 Deepsea
🧵10/20
👉 started in rivers, estuaries, nearshore coastal waters
👉 before rapidly expanding out across the oceans.
Lower risk only in harder-to-fish nearshore habitats, ie,
👉 Kelp/algal reefs
👉 Rocky reefs, &
👉 Deepsea
🧵10/20
Reposted by Ignasi Nuez, Dr.
BREAKING: The IUCN Species Survival Commission Shark Specialist Group has released a new report on the global conservation status of sharks and their relatives.
portals.iucn.org/library/node...
portals.iucn.org/library/node...
December 2, 2024 at 11:43 AM
BREAKING: The IUCN Species Survival Commission Shark Specialist Group has released a new report on the global conservation status of sharks and their relatives.
portals.iucn.org/library/node...
portals.iucn.org/library/node...
Reposted by Ignasi Nuez, Dr.
No idea who to follow? 🧪🌊🦑
Try these starter packs & Follow All or some:
Marine Ecology: go.bsky.app/4PTX62K
Ocean Technology: go.bsky.app/VgpFR6B
Shark scientists : go.bsky.app/Q1x1gJB
Ocean Women: go.bsky.app/7MdiLgo
Ocean Women II: go.bsky.app/4wMsfX4
Plankton Ecology: go.bsky.app/8fAUg8j
Try these starter packs & Follow All or some:
Marine Ecology: go.bsky.app/4PTX62K
Ocean Technology: go.bsky.app/VgpFR6B
Shark scientists : go.bsky.app/Q1x1gJB
Ocean Women: go.bsky.app/7MdiLgo
Ocean Women II: go.bsky.app/4wMsfX4
Plankton Ecology: go.bsky.app/8fAUg8j
November 26, 2024 at 1:12 PM
No idea who to follow? 🧪🌊🦑
Try these starter packs & Follow All or some:
Marine Ecology: go.bsky.app/4PTX62K
Ocean Technology: go.bsky.app/VgpFR6B
Shark scientists : go.bsky.app/Q1x1gJB
Ocean Women: go.bsky.app/7MdiLgo
Ocean Women II: go.bsky.app/4wMsfX4
Plankton Ecology: go.bsky.app/8fAUg8j
Try these starter packs & Follow All or some:
Marine Ecology: go.bsky.app/4PTX62K
Ocean Technology: go.bsky.app/VgpFR6B
Shark scientists : go.bsky.app/Q1x1gJB
Ocean Women: go.bsky.app/7MdiLgo
Ocean Women II: go.bsky.app/4wMsfX4
Plankton Ecology: go.bsky.app/8fAUg8j
New research found white sharks reduced a lot their interactions with counterilluminated seal decoys vs control decoys.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Counterillumination reduces bites by Great White sharks
In the open ocean, achieving camouflage is complicated by the fact that the downwelling light is generally much brighter than the upwelling light, whi…
www.sciencedirect.com
November 25, 2024 at 9:51 AM
New research found white sharks reduced a lot their interactions with counterilluminated seal decoys vs control decoys.
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Reposted by Ignasi Nuez, Dr.
A few interesting papers out lately on human-shark interactions:
Reducing fisher-shark conflict
link.springer.com/article/10.1...
Counterillumination reduces bites
www.cell.com/current-biol...
Do individual sharks bite humans more than once?
conbio.onlinelibrary.wiley.com/doi/pdf/10.1...
#shark
Reducing fisher-shark conflict
link.springer.com/article/10.1...
Counterillumination reduces bites
www.cell.com/current-biol...
Do individual sharks bite humans more than once?
conbio.onlinelibrary.wiley.com/doi/pdf/10.1...
#shark
November 15, 2024 at 4:28 AM
A few interesting papers out lately on human-shark interactions:
Reducing fisher-shark conflict
link.springer.com/article/10.1...
Counterillumination reduces bites
www.cell.com/current-biol...
Do individual sharks bite humans more than once?
conbio.onlinelibrary.wiley.com/doi/pdf/10.1...
#shark
Reducing fisher-shark conflict
link.springer.com/article/10.1...
Counterillumination reduces bites
www.cell.com/current-biol...
Do individual sharks bite humans more than once?
conbio.onlinelibrary.wiley.com/doi/pdf/10.1...
#shark
Hello there, folks. Looks like Bluesky is here to get us all back on the right track. Well then, I’m up for that too. I’ll be mostly posting about shark research and conservation and, quite frequently, about these guys (Hexanchus griseus) in the Mediterranean. See you around!
November 14, 2024 at 8:28 AM
Hello there, folks. Looks like Bluesky is here to get us all back on the right track. Well then, I’m up for that too. I’ll be mostly posting about shark research and conservation and, quite frequently, about these guys (Hexanchus griseus) in the Mediterranean. See you around!