Herbivorous Grass Carp (Ctenopharyngodon idella) Exhibit Greater Olfactory Response to Amino Acids Than Filter-Feeding Bighead (Hypophthalmichthys nobilis) and Silver Carp (Hypophthalmichthys molitrix)

Article Biodiversity Conservation

Behavioral response of juvenile silver and bighead carp to conspecific and heterospecific alarm cues

Jared C. Wilson et al.

Summary: The study evaluated the fright response of juvenile bighead and silver carps when exposed to alarm cues from conspecific and heterospecific fishes. Results showed that both species were unable to recognize chemical alarm cues from North American cypriniforms, but were able to recognize conspecific alarm cues. Bighead carp and silver carp responded differently to conspecific alarm cues, with silver carp increasing distance among individuals and bighead carp reducing distance between individuals. Both species showed a reduction in activity after chemical application.

BIOLOGICAL INVASIONS (2021)

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Article Ecology

Non-native silver carp fail to generalize behavior when exposed to odors from three North American predators

Jared C. Wilson et al.

Summary: Predator-prey interactions significantly affect juvenile fish survival. The susceptibility of a habitat to invasion is influenced by native predators' ability to regulate invasive species. Juvenile silver carp showed no innate response to predator odors, and even when conditioned to recognize one predator's odor, they were unable to generalize it to other predators.

ENVIRONMENTAL BIOLOGY OF FISHES (2021)

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Article Biochemistry & Molecular Biology

The attractive effects of amino acids and some classical substances on grass carp (Ctenopharyngodon idellus)

Haojie Yu et al.

Summary: This study systematically investigated the effects of 16 test substances on the behavior and physiology of grass carp. The results showed the attractive effect of some amino acids and other chemicals on grass carp fishing, which could provide support for the production of specific grass carp attractants.

FISH PHYSIOLOGY AND BIOCHEMISTRY (2021)

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Article Fisheries