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Saltwater crocodiles raised in captivity don't return to breeding centers after being released into the wild

Phys · · 659 words · By Murdoch University

A study published in Wildlife Research indicates that captive-reared saltwater crocodiles in Bangladesh do not exhibit the same homing behaviors as wild crocodiles when released. This suggests that releasing adult captive-bred crocodiles may be a more viable conservation strategy than translocating wild ones.

open_in_new Read the original article: https://phys.org/news/2026-05-saltwater-crocodiles-captivity-dont-centers.html

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0%
Propaganda Score
confidence: 100%
Low risk. This article shows minimal use of propaganda techniques.

fact_checkFact-Check Results

10 claims extracted and verified against multiple sources including cross-references, web search, and Wikipedia.

verified Verified 5
info Single Source 3
check_circle Corroborated 1
help Insufficient Evidence 1
verified
“saltwater crocodiles born or raised in captivity may not return to their breeding centers after being released into the wild”
VERIFIED
The evidence from the research paper 'What is home? Post-release movements of captive-reared and translocated mature saltwater crocodiles in Bangladesh' explicitly states that captive-reared crocodiles showed no indication of homing towards prior husbandry sites.
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web search NEUTRAL — CAPTIVE definition: 1. a person or animal whose ability to move or act freely is limited by being kept in a space; a…. Learn more.
https://dictionary.cambridge.org/dictionary/english/captive
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web search NEUTRAL — 2. Held in bondage; enslaved. 3. Kept under restraint or control; confined: captive birds. 4. Enraptured, as by beauty; captivated. 5. Restrained by circumstances that prevent free choice: a captive a…
https://www.thefreedictionary.com/captive
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web search NEUTRAL — The meaning of CAPTIVE is taken and held as or as if a prisoner of war. How to use captive in a sentence.
https://www.merriam-webster.com/dictionary/captive
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“The research team conducted a study in the Sundarbans mangrove forest in Bangladesh”
CORROBORATED
Multiple web search results confirm the study was conducted in the Sundarbans mangrove forest in Bangladesh.
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web search NEUTRAL — On March 13, the Bangladesh forest department tagged satellite transmitters on two saltwater crocodiles for the first time in Asia and released them in the Sundarbans waters. So far, four ...
https://news.mongabay.com/2024/04/bangladesh-using-satellite…
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web search NEUTRAL — The research team conducted a study in the Sundarbans mangrove forest in Bangladesh, one of the last strongholds for saltwater crocodiles in the country. The paper, "What is home?
https://phys.org/news/2026-05-saltwater-crocodiles-captivity…
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web search NEUTRAL — DHAKA — In a breakthrough in saltwater crocodile conservation in the country, Bangladesh has started using a satellite tagging system to monitor the species' movements, habits, and life span in the Su…
https://focusingonwildlife.com/news/bangladesh-uses-satellit…
verified
“The paper, "What is home? Post-release movements of captive-reared and translocated mature saltwater crocodiles in Bangladesh," was published in the journal Wildlife Research.”
VERIFIED
The existence of the paper with the exact title 'What is home? Post-release movements of captive-reared and translocated mature saltwater crocodiles in Bangladesh' is confirmed by multiple sources, including a PDF reference and James Cook University's research records.
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web search NEUTRAL — Post-release movements of captive-reared and translocated mature saltwater crocodiles in Bangladesh For full list of author affiliations and declarations see end of paper *Correspondence to: Ruchira So…
https://www.academia.edu/165290769/What_is_home_Post_release…
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web search NEUTRAL — Post-release movements of captive-reared and translocated mature saltwater crocodiles in Bangladesh.
https://www.researchgate.net/scientific-contributions/Steve-…
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web search NEUTRAL — Take online courses on Study.com that are fun and engaging. Pass exams to earn real college credit. Research schools and degrees to further your education.
https://study.com/
verified
“Intensive commercial exploitation for skins until the 1970s decimated saltwater crocodile populations in Bangladesh”
VERIFIED
A web search result explicitly states that 'Large scale commercial exploitation for crocodile skins up to the 1970s depleted the saltwater crocodile population in Bangladesh', citing Whitaker (1982) and Tamang (1993).
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wikipedia NEUTRAL — Bangladesh has a developing mixed economy. As the second-largest economy in South Asia, The economy is the 34th largest in the world in nominal terms, and 25th largest by purchasing power parity. Bang…
https://en.wikipedia.org/wiki/Economy_of_Bangladesh
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wikipedia NEUTRAL — The bank sector in Bangladesh consists of several types of institutions. Bangladesh Bank is the central bank of Bangladesh and the chief regulatory authority in the banking sector. According to the Ba…
https://en.wikipedia.org/wiki/List_of_banks_in_Bangladesh
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wikipedia NEUTRAL — United Commercial Bank PLC (UCB) is a commercial bank in Bangladesh. It was established in 1983.
https://en.wikipedia.org/wiki/United_Commercial_Bank_(Bangla…
+ 3 more evidence sources
info
“despite formal legal protection since 1973, populations have shown no measurable signs of recovery”
SINGLE SOURCE
While the general threat to crocodilians is mentioned in Wikipedia, the specific claim regarding the lack of measurable recovery in Bangladesh since 1973 is not independently corroborated by the provided evidence snippets, though it appears in the context of the study mentioned in other claims.
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wikipedia NEUTRAL — Bangladesh, officially the People's Republic of Bangladesh, is a country in South Asia. It is the eighth-most populous country in the world and among the most densely populated with a population of al…
https://en.wikipedia.org/wiki/Bangladesh
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wikipedia NEUTRAL — The fauna of Bangladesh includes about 1,600 species of vertebrate fauna and about 1,000 species of invertebrate fauna based on incomplete records. The vertebrate fauna consists of roughly 22 species …
https://en.wikipedia.org/wiki/Fauna_of_Bangladesh
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wikipedia NEUTRAL — The saltwater crocodile (Crocodylus porosus) is a crocodilian native to saltwater habitats, brackish wetlands and freshwater rivers from India's east coast across Southeast Asia and the Sundaland to n…
https://en.wikipedia.org/wiki/Saltwater_crocodile
+ 3 more evidence sources
info
“The most recent survey estimated 140 mature individuals [in the Sundarbans]”
SINGLE SOURCE
The provided evidence mentions population increases in the Sundarbans (The Hindu, Rau's IAS), but does not explicitly confirm the specific number '140 mature individuals' as the most recent survey estimate.
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wikipedia NEUTRAL — The Bengal tiger is a population of the Panthera tigris tigris subspecies. It ranks among the largest of wild cats. It is distributed from India, southern Nepal, Bangladesh, Bhutan to Southwestern Chi…
https://en.wikipedia.org/wiki/Bengal_tiger
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wikipedia NEUTRAL — Sundarbans (Bengali: সুন্দরবন; pronounced ) is a mangrove forest area in the Ganges Delta formed by the confluence of the Ganges, Brahmaputra and Meghna Rivers in the Bay of Bengal. It spans the area …
https://en.wikipedia.org/wiki/Sundarbans
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wikipedia NEUTRAL — Sundarbans National Park is a national park in West Bengal, India, and core part of tiger reserve and biosphere reserve. It is part of the Sundarbans on the Ganges Delta and adjacent to the Sundarban …
https://en.wikipedia.org/wiki/Sundarbans_National_Park
+ 3 more evidence sources
verified
“The team tagged five mature saltwater crocodiles with satellite tracking devices, including three captive-reared females that had spent 8–22 years in captivity, one local wild crocodile caught and released in the same location, and one wild crocodile that was moved (translocated) far from where it was caught.”
VERIFIED
The methods section of the PDF 'What is home? Post-release movements of captive-reared and translocated mature saltwater crocodiles in Bangladesh' confirms five mature crocodiles were monitored: three captive-reared, one wild-caught and released, and one wild-caught translocated.
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wikipedia NEUTRAL — The gharial (Gavialis gangeticus), also known as gavial or fish-eating crocodile, is a crocodilian in the family Gavialidae and among the longest of all living crocodilians. Mature females are 2.6 to …
https://en.wikipedia.org/wiki/Gharial
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wikipedia NEUTRAL — The saltwater crocodile (Crocodylus porosus) is a crocodilian native to saltwater habitats, brackish wetlands and freshwater rivers from India's east coast across Southeast Asia and the Sundaland to n…
https://en.wikipedia.org/wiki/Saltwater_crocodile
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wikipedia NEUTRAL — Sundarbans (Bengali: সুন্দরবন; pronounced ) is a mangrove forest area in the Ganges Delta formed by the confluence of the Ganges, Brahmaputra and Meghna Rivers in the Bay of Bengal. It spans the area …
https://en.wikipedia.org/wiki/Sundarbans
+ 3 more evidence sources
verified
“the three captive-reared crocodiles showed no evidence of trying to go back to their breeding facility”
VERIFIED
The research paper explicitly concludes that 'captive-reared crocodiles showed no indication of homing towards prior husbandry sites'.
travel_explore
web search NEUTRAL — Type of crocodile studied: crocodiles found in salt water. Location of study: Northern Territory, Australia.Reasons for study: the management of crocodiles by the government may not be effective. Rese…
https://www.tutorlistening.com/blog/crocodile-study-ielts-li…
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web search NEUTRAL — This study presents the first analysis of diet and body condition of wild Philippine crocodiles and headstarted (i.e. captive-reared) individuals released into the wild over the last decade, and uses …
https://www.researchgate.net/publication/357097229_Captive_b…
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web search NEUTRAL — Importantly, captive-reared crocodiles showed no indication of homing towards prior husbandry sites, despite long-term captivity. Conclusions Mature captive-reared crocodiles were able to establish ra…
https://www.academia.edu/165290769/What_is_home_Post_release…
info
“the wild crocodile Jongra, who was translocated about 132km from his home before being released... his movements were very clearly going in that direction [of his original capture site]”
SINGLE SOURCE
The provided Wikipedia results for 'India-Bangladesh enclaves' and 'Patgram Upazila' are irrelevant to the specific movements of a crocodile named Jongra. No other provided evidence confirms this specific detail.
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wikipedia NEUTRAL — Patgram (Bengali: পাটগ্রাম) is an upazila of Lalmonirhat District in Rangpur Division, far northern Bangladesh. It had 27 enclaves, most notably Dahagram–Angarpota which is connected to the Bangladesh…
https://en.wikipedia.org/wiki/Patgram_Upazila
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wikipedia NEUTRAL — The India–Bangladesh enclaves, also known as the Chiṭmahals (Bengali: ছিটমহল chiṭmôhôl) and sometimes called Pasha enclaves, were the enclaves along the Bangladesh–India border, in Bangladesh and the …
https://en.wikipedia.org/wiki/India–Bangladesh_enclaves
help
“He [Jongra]... recorded single-day movements of more than 30 kilometers”
INSUFFICIENT EVIDENCE
No evidence was found in the provided search results regarding the specific daily movement distance of the crocodile Jongra.
info Disclaimer: This analysis is generated by AI and should be used as a starting point for critical thinking, not as definitive truth. Claims are verified against publicly available sources. Always consult the original article and additional sources for complete context.