Coral Fish in Symbiotic Associations: Benefits and Risks

Zykova, A. V.; Mikheev, V. N.

doi:10.1134/s2079086418010073

Cited by 2 publications

(2 citation statements)

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“…Habitat enrichment is an important part of the restoration of nursery grounds for juvenile salmonids and marine fish 3,[33][34][35] , thus our study suggests a hypothesis (to be tested empirically) that only an optimal pattern of habitat enrichment can facilitate the availability of vital resources to fish without increasing vulnerability to predators and parasites. The proposed theoretical framework can be used to explain the observed population density of some species of coral fish 21 , which contest refuges in corals. The model predicts that a gradual decrease in shelters due to the degradation of a coral reef would result in a severe drop in population density.…”

Section: Discussionmentioning

confidence: 99%

“…We conclude that installing an insufficient number of shelters in aquaculture and restoration programs would be counterproductive in terms of having a higher parasite acquisition, and a decrease in the overall population size. The proposed theoretical framework can be also applied to better understand the role of behavioral structuring on the population dynamics of some coral fish 21 as well as freshwater fish 22 .…”

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confidence: 99%

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Revisiting the role of behavior-mediated structuring in the survival of populations in hostile environments

Sandhu,

Mikheev,

Pasternak

et al. 2024

Commun Biol

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Increasing the population density of target species is a major goal of ecosystem and agricultural management. This task is especially challenging in hazardous environments with a high abundance of natural enemies such as parasites and predators. Safe locations with lower mortality have been long considered a beneficial factor in enhancing population survival, being a promising tool in commercial fish farming and restoration of threatened species. Here we challenge this opinion and revisit the role of behavior structuring in a hostile environment in shaping the population density. We build a mathematical model, where individuals are structured according to their defensive tactics against natural enemies. The model predicts that although each safe zone enhances the survival of an individual, for an insufficient number of such zones, the entire population experiences a greater overall mortality. This is a result of the interplay of emergent dynamical behavioral structuring and strong intraspecific competition for safe zones. Non-plastic structuring in individuals’ boldness reduces the mentioned negative effects. We demonstrate emergence of non-plastic behavioral structuring: the evolutionary branching of a monomorphic population into a dimorphic one with bold/shy strains. We apply our modelling approach to explore fish farming of salmonids in an environment infected by trematode parasites.

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