PubHawk
September 2019 PMID 31286510

The sex-determination pattern in crocodilians: A systematic review of three decades of research.

Edgar J González, Marcela Martínez-López, Marco Antonio Morales-Garduza, Rodrigo García-Morales, Pierre Charruau, José Alberto Gallardo-Cruz

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Mentions

46
Peak: 17 in Jun 2023
across 5 sources since Jul 2019

Extended reach

646,538
potential audience

Total likes

21,986

Video views

279,348

Mentions per month

Jul 2019 – Sep 2025

Where it's discussed

  • X / Twitter38 posts
  • News3 articles
  • YouTube2 videos
  • Facebook2 posts
  • Bluesky1 posts

AI synopsis

What people are saying

Discussions about the article reveal a strong fascination with the idea that crocodiles lack sex chromosomes and that temperature, rather than genetics, determines sex. Words like 'milagre' and phrases like 'desvendando o segredo' (unveiling the secret) convey a tone of amazement and curiosity. Many comments highlight the relevance of this research to broader biological and environmental issues, emphasizing its potential impact.

AgreementModerate agreement

Most discussions acknowledge the nature of crocodilian sex determination being temperature-dependent, with many posts supporting the research findings or highlighting the lack of sex chromosomes in crocodiles.

InterestHigh interest

Posts demonstrate high interest by sharing engaging facts, such as females reproducing without males and using energetic language like 'milagre' and 'desvendando,' indicating curiosity and fascination with the topic.

EngagementHigh engagement

Several posts actively engage with the research, citing specific concepts like the FMF pattern and comparing crocodilians to other species, showing deep thought and analysis.

ImpactModerate impact

The discussions reflect an understanding that this research is significant, as some posts refer to the study as 'game-changing' or emphasize its relevance to current climate concerns, suggesting recognition of its broader implications.

Abstract in brief

  • The sex determination in crocodilians is temperature-dependent, with different incubation temperatures producing varying ratios of male and female hatchlings, best described by the FMF pattern, which features a female bias at low and high temperatures and males at intermediate temperatures.
  • The study analyzed data from 31 research papers involving 8,458 hatchlings across multiple species and locations, revealing a common FMF pattern supported by empirical evidence, though the pattern's specifics can vary based on the species and latitude.
  • Findings suggest that the FMF pattern is flexible and can change, which is particularly important given the current climate change scenario, as it impacts the sex ratios and reproductive dynamics of crocodilian populations.
Read the full abstract

Top posts

Most liked on X and Bluesky
Beatriz Barban
@beatrizbarban · X

Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 19, 2023 · 83 likes · 9 shares · 611 followers View post →
Thomas R. Holtz, Jr.
@TomHoltzPaleo · X

The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal of Animal Ecology - Wiley Online Library https://t.co/kYPdXkV2iu

Jul 13, 2019 · 18 likes · 7 shares · 31,853 followers View post →
Pirulla Bot
@pirullabot · X

Pirulla = 26min:45s:493ms Variação

Jun 19, 2023 · 17 likes · 365 followers View post →
Priss Guerrero "The Last Clever Barbarian"
@prissguerrero1 · X

O @Pirulla25 fez um vídeo muito incrível que deixaria a senadora do Jesus Na Goiabeira em prantos!* *Quero que vcs vejam o vídeo, é muito legal! https://t.co/Wcn5CEqBI4

Jun 25, 2023 · 7 likes · 2,953 followers View post →
Fê Casali
@fe_casali · X

dona "jacaroa" cristã ? Fêmea de crocodilo reproduziu sem macho!! (#Pirula 372) https://t.co/wv3S0htpUC via @YouTube

Jun 19, 2023 · 3 likes · 4,210 followers View post →
Unity
@Unity_MoT · X

@salanaland @WinnowingWind @Bathilde777 @lecanardnoir @jblconnor @EvelynRobichaud @TerriWhiti @AriDrennen Here's a review paper on sex determination in crocodiles, please read and quote the section in which their sex chromosomes are described. https://t.co/2HHy254Hb8

Feb 23, 2024 · 2 likes · 2,402 followers View post →

All mentions

Lv
@LVampre84526 · X

https://t.co/DXVI7HZfgL

Sep 11, 2025 · 19 followers View post →
Priss Guerrero - The Last Clever Barbarian
@prissguerrero1.bsky.social · Bluesky

Acabamos de ver esse aqui sobre partenogênese, que é muito legal. Tem crocodilos, gente! youtu.be/cJHkIUBIrFs?...

Jun 10, 2025 · 1 share View post →
Harriet Carroll: Long Covid Scientific Consultancy
@angryhacademic · X

RT @angryhacademic: Fun fact: crocodiles dont have sex determining chromosomes This is why their sex is temperature dependent: https://t.…

Jun 8, 2025 · 2 shares · 8,760 followers View post →
Marcus Duarte
@MarcusDuarte88 · X

RT @beatrizbarban: Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 3, 2025 · 9 shares · 582 followers View post →
Papp Réka
@Langhaerdur · X

vajon a Zállatotvost is utoléri a cenzúra? https://t.co/RwtTMIQQYx

May 18, 2025 · 330 followers View post →
Chocolatey - Purple-haired c*nt
@WitchyMcWitch · X

@emmyontwt @carlow_caoimhe @inosuwaa @Heather_pw @AstaRose7 @WinnowingWind @RottIsHot @poisonjr Errrr. "offspring are often comprised of a singular sex" How strange that Edgar J. González et al disagree with your, no doubt, vast knowledge https://t.co/KporJnkj7D

Dec 17, 2024 · 1 like · 13,145 followers View post →
Lv
@LVampre84526 · X

https://t.co/CDZQOm4yYv

Aug 1, 2024 · 19 followers View post →
Harriet Carroll: Long Covid Scientific Consultancy
@angryhacademic · X

RT @angryhacademic: Fun fact: crocodiles dont have sex determining chromosomes This is why their sex is temperature dependent: https://t.…

Jun 8, 2024 · 2 shares · 8,760 followers View post →
Unity
@Unity_MoT · X

@salanaland @WinnowingWind @Bathilde777 @lecanardnoir @jblconnor @EvelynRobichaud @TerriWhiti @AriDrennen Here's a review paper on sex determination in crocodiles, please read and quote the section in which their sex chromosomes are described. https://t.co/2HHy254Hb8

Feb 23, 2024 · 2 likes · 2,402 followers View post →
Priss Guerrero "The Last Clever Barbarian"
@prissguerrero1 · X

O @Pirulla25 fez um vídeo muito incrível que deixaria a senadora do Jesus Na Goiabeira em prantos!* *Quero que vcs vejam o vídeo, é muito legal! https://t.co/Wcn5CEqBI4

Jun 25, 2023 · 7 likes · 2,953 followers View post →
Soofabricio
@Soofabricio · X

Doidera, o sexo do crocodilo não é definido por cromossomos sexuais, pq ele nem tem. É a temperatura q define o sexo. Chapei https://t.co/Fcx6MH90ia

Jun 22, 2023 · 74 followers View post →
Psherman42RuaWallabyWaySidney
@Qwerty_IA262 · X

RT @beatrizbarban: Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 20, 2023 · 9 shares · 38 followers View post →
Guh
@Charmanderzilla · X

Tava esperando esse vídeo e foi da melhor forma possível... Com o @Pirulla25 raiz ❤️ (lembrei muito de edições antigas). Mas uma dúvida.. Pq vc fez um shorts?? Todo mundo sabe que um vídeo seu com menos de 30 minutos pode ser considerado um shorts

Jun 20, 2023 · 15 followers View post →
las226
@las2261 · X

RT @beatrizbarban: Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 20, 2023 · 9 shares · 195 followers View post →
Cogita Tuti
@CogitaTuti · X

RT @beatrizbarban: Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 19, 2023 · 9 shares · 3,037 followers View post →
Ingrid, PFF2
@FX115 · X

RT @beatrizbarban: Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 19, 2023 · 9 shares · 129 followers View post →
j0k3r
@rddalceno · X

RT @beatrizbarban: Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 19, 2023 · 9 shares · 86 followers View post →
bodypiercer com fobia de agulha
@viktorsauro · X

RT @beatrizbarban: Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 19, 2023 · 9 shares · 415 followers View post →
Pirula
@Pirulla25 · X

RT @beatrizbarban: Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 19, 2023 · 9 shares · 241,145 followers View post →
Ingrid, PFF2
@FX115 · X

https://t.co/zASgXF14Hk

Jun 19, 2023 · 129 followers View post →
Beatriz Barban
@beatrizbarban · X

Tio @Pirulla25 , em plena segunda-feira, desvendando o "milagre" da crocodila

Jun 19, 2023 · 83 likes · 9 shares · 611 followers View post →
Dr. Talibã
@Claudio_msz · X

Fêmea de crocodilo reproduziu sem macho!! (#Pirula 372) https://t.co/aXLdxo1tjF via @YouTube

Jun 19, 2023 · 420 followers View post →
Pirulla Bot
@pirullabot · X

Pirulla = 26min:45s:493ms Variação

Jun 19, 2023 · 17 likes · 365 followers View post →
Fê Casali
@fe_casali · X

dona "jacaroa" cristã ? Fêmea de crocodilo reproduziu sem macho!! (#Pirula 372) https://t.co/wv3S0htpUC via @YouTube

Jun 19, 2023 · 3 likes · 4,210 followers View post →
Harriet Carroll: Long Covid Scientific Consultancy
@angryhacademic · X

Fun fact: crocodiles dont have sex determining chromosomes This is why their sex is temperature dependent: https://t.co/M3Y9PiwR4X Unlike turtles, crocs seem to produce females at low and high temperatures, with men in the middle temperatures https://t.co/sZnHFj3JHG

Jun 8, 2023 · 1 like · 2 shares · 8,760 followers View post →
UT Animal Science
@UTAnimalScience · X

Animal Science March Madness - VOTE NOW! Genius Genomics Matchup! Naked Mole Rat- Long life, cancer resistance, genes linked to longevity: https://t.co/dNnVudGq1e Crocodile- No sex chromosomes; sex based on egg incubation temp: https://t.co/22s2qWoqdj @UTIAg @CritterChatter

Apr 12, 2023 · 2,687 followers View post →
Liz Eckelkamp
@DairEgirl · X

RT @UTAnimalScience: Animal Science March Madness - VOTE NOW! Genius Genomics Matchup! Crocodile- No sex chromosomes; sex based on egg in…

Mar 30, 2023 · 1 share · 129 followers View post →
UT Animal Science
@UTAnimalScience · X

Animal Science March Madness - VOTE NOW! Genius Genomics Matchup! Crocodile- No sex chromosomes; sex based on egg incubation temp: https://t.co/9ZLGHKijy2 Woolly Mammoth- Oldest DNA ever sequenced: https://t.co/DRFAqwwLX0 @CritterChatter @UTIAg @utcvm

Mar 29, 2023 · 1 share · 2,687 followers View post →
Mario
@L_ssar · X

RT @TomHoltzPaleo: The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal…

Jul 15, 2019 · 7 shares · 2,864 followers View post →
Adam Britton
@adambritton · X

RT @TomHoltzPaleo: The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal…

Jul 15, 2019 · 7 shares · 1,320 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @inarvaezp: "The sex-determination pattern in crocodilians: A systematic review of three decades of research" by E.J. González (@edgarjg…

Jul 14, 2019 · 1 share · 6,711 followers View post →
Ruby projecting himself on the humble nautilus
@Strayed_Raptor · X

RT @TomHoltzPaleo: The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal…

Jul 14, 2019 · 7 shares · 449 followers View post →
TroodonVet (C0mms open)
@troodonvet · X

RT @TomHoltzPaleo: The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal…

Jul 14, 2019 · 7 shares · 5,373 followers View post →
Stephanie Drumheller
@UglyFossils · X

RT @TomHoltzPaleo: The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal…

Jul 13, 2019 · 7 shares · 1,700 followers View post →
Kuzco
@Kuzco297 · X

RT @TomHoltzPaleo: The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal…

Jul 13, 2019 · 7 shares · 285 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @TomHoltzPaleo: The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal…

Jul 13, 2019 · 7 shares · 6,711 followers View post →
Thomas R. Holtz, Jr.
@TomHoltzPaleo · X

The sex‐determination pattern in crocodilians: A systematic review of three decades of research - González - - Journal of Animal Ecology - Wiley Online Library https://t.co/kYPdXkV2iu

Jul 13, 2019 · 18 likes · 7 shares · 31,853 followers View post →
SystematicReviewBot
@EvidenceRobot · X

RT @sexgenomics: The sex-determination pattern in crocodilians: A systematic review of three decades of research. https://t.co/7j6lHnc0S4

Jul 10, 2019 · 1 share · 6,711 followers View post →
SexGenomics
@sexgenomics · X

The sex-determination pattern in crocodilians: A systematic review of three decades of research. https://t.co/7j6lHnc0S4

Jul 10, 2019 · 1 like · 1 share · 813 followers View post →