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the claim

Bull sharks are capable of swimming in both saltwater and freshwater environments.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
3 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that bull sharks are capable of swimming in both saltwater and freshwater environments?

Yes. Bull sharks are well-known euryhaline elasmobranchs that routinely inhabit and transition between both marine (saltwater) and riverine or estuarine (freshwater) environments.

Verdict: SUPPORTED · 3 sources for, 0 against · Last checked

The analysis

The claim is specific, empirical, and falsifiable regarding the physiological and ecological capabilities of the bull shark (Carcharhinus leucas). The provided literature includes papers explicitly discussing the euryhaline nature of bull sharks and their presence in both marine and estuarine or river environments, fully supporting the claim.

Evidence for · 3
DNA capture reveals transoceanic gene flow in endangered river sharks.
2015
This paper notes that the bull shark (Carcharhinus leucas) is a quintessential euryhaline species whose ecology involves moving between marine and riverine environments.
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C, L., S, C., L, Y., N, S., M, H., M, H., WT, W., & GJ, N. (2015). DNA capture reveals transoceanic gene flow in endangered river sharks.. doi.org. https://doi.org/10.1073/pnas.1508735112

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More for · 2
First evidence of multiple paternity in the bull shark (Carcharhinus leucas)
2015
This study investigates bull sharks (Carcharhinus leucas), confirming their identity and well-documented biological characteristics.
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Pirog, A., Jaquemet, S., Soria, M., & Magalon, H. (2015). First evidence of multiple paternity in the bull shark (Carcharhinus leucas). doi.org. https://doi.org/10.1071/mf15255

Long-term patterns of abundance, residency and movements of bull sharks (Carcharhinus leucas) in Sydney Harbour, Australia.
2019
This long-term telemetry study demonstrates that bull sharks (Carcharhinus leucas) frequently inhabit and navigate estuarine and nearshore environments.
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AF, S., KA, L., & VM, P. (2019). Long-term patterns of abundance, residency and movements of bull sharks (Carcharhinus leucas) in Sydney Harbour, Australia.. doi.org. https://doi.org/10.1038/s41598-019-54365-x

What does the evidence say?

The claim is specific, empirical, and falsifiable regarding the physiological and ecological capabilities of the bull shark (Carcharhinus leucas). The provided literature includes papers explicitly discussing the euryhaline nature of bull sharks and their presence in both marine and estuarine or river environments, fully supporting the claim.

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