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Carp eggs survive transport through avian intestine

Fish have somehow colonized isolated water bodies all over the world without human assistance. It has long been speculated that these colonization events are assisted by waterbirds, transporting fish eggs attached to their feet and feathers, yet empirical support for this is lacking. Recently, it was suggested that endozoochory (i.e., internal transport within the gut) might play a more important role, but only highly resistant diapause eggs of killifish have been found to survive passage through waterbird guts. A controlled feeding experiment was performed, where developing eggs of two cosmopolitan, invasive cyprinids (common carp, Prussian carp) were fed to captive mallards (Anas platyrhynchos). Live embryos of both species were retrieved from fresh feces and survived beyond hatching. This study identifies an overlooked dispersal mechanism in fish, providing evidence for bird-mediated dispersal ability of soft-membraned eggs undergoing active development. Only 0.2% of ingested eggs survived gut passage, yet, given the abundance, diet, and movements of ducks in nature, these results have major implications for biodiversity conservation and invasion dynamics in freshwater ecosystems. informacion[at]ebd.csic.es: Lovas-Kiss et al (2020) Experimental evidence of dispersal of cyprinid eggs inside migratory waterfowl. PNAS doi/10.1073/pnas.2004805117


https://www.pnas.org/content/early/2020/06/17/2004805117
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Content with tag endozoochory .

Carp eggs survive transport through avian intestine

Fish have somehow colonized isolated water bodies all over the world without human assistance. It has long been speculated that these colonization events are assisted by waterbirds, transporting...

Angiosperm seeds lacking external flesh can be adapted for endozoochory

It is often assumed that only plants with a fleshy fruit disperse inside vertebrate guts, i.e. by “endozoochory”. However, only 8% of European angiosperms have a fleshy fruit, and endozoochory of...

Fish eggs can be dispersed by waterfowl

Researchers have found that eggs of two fish species can survive passage through the digestive tract of waterfowl after being swallowed, and this finding may help explain the long-standing mystery...

European Corvids disperse plants from 42 families by endozoochory

Members of the crow family (Corvidae) are known to disperse seeds by frugivory or by scatter hoarding, but are rarely recognized as vectors of plants lacking a fleshy fruit, or a large nut. A...

Waterbirds can disperse whole plants inside their guts

It is well known that some plants and plant fragments can become attached to the feathers of ducks and other waterbirds and be transported short distances. An increasing diversity of plant seeds...
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