Fish functional traits are affected by hydrodynamics at small spatial scale

Gianluca Sara', Cristina Giacoma, Sarà, Dean, Claudia Bracciali

Risultato della ricerca: Article

3 Citazioni (Scopus)

Abstract

The Mediterranean damselfish Chromis chromis is a species with a broad distribution found both in the Mediterranean Sea and Eastern Atlantic as far south as the coast of Angola. We hypothesized that the species may have significant functional morphological plasticity to adapt along a gradient of environmental conditions. It is a non-migratory zooplanktivorous species and spends the daytime searching for food in the middle of the water column. Therefore, local hydrodynamics could be one of the environmental factors affecting traits of C. chromis with repercussions at the population level. We compared the body condition, individual growth and body shapes of damselfish collected under two different hydrodynamic conditions (low ~10 cm s-1 vs. high ~20 cm s-1). Specimens showed higher body condition under high-hydrodynamics, where conditions offered greater amounts of food, which were able to support larger individuals. Individuals smaller than 60-mm were more abundant under low-hydrodynamics. Morphometric analysis revealed that high-hydrodynamics were favored by fish with a more fusiform body shape and body traits developed for propellant swimming.
Lingua originaleEnglish
pagine (da-a)116-123
Numero di pagine8
RivistaMarine Environmental Research
Volume113
Stato di pubblicazionePublished - 2016

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Fish
hydrodynamics
Hydrodynamics
fish
body shape
Pomacentridae
body condition
animal morphology
Angola
environmental factors
food
Propellants
anthropometric measurements
Mediterranean Sea
Plasticity
plasticity
Coastal zones
environmental factor
water column
environmental conditions

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Pollution
  • Aquatic Science

Cita questo

Fish functional traits are affected by hydrodynamics at small spatial scale. / Sara', Gianluca; Giacoma, Cristina; Sarà; Dean; Bracciali, Claudia.

In: Marine Environmental Research, Vol. 113, 2016, pag. 116-123.

Risultato della ricerca: Article

Sara', G, Giacoma, C, Sarà, Dean & Bracciali, C 2016, 'Fish functional traits are affected by hydrodynamics at small spatial scale', Marine Environmental Research, vol. 113, pagg. 116-123.
Sara', Gianluca ; Giacoma, Cristina ; Sarà ; Dean ; Bracciali, Claudia. / Fish functional traits are affected by hydrodynamics at small spatial scale. In: Marine Environmental Research. 2016 ; Vol. 113. pagg. 116-123.
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AU - Dean, null

AU - Bracciali, Claudia

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N2 - The Mediterranean damselfish Chromis chromis is a species with a broad distribution found both in the Mediterranean Sea and Eastern Atlantic as far south as the coast of Angola. We hypothesized that the species may have significant functional morphological plasticity to adapt along a gradient of environmental conditions. It is a non-migratory zooplanktivorous species and spends the daytime searching for food in the middle of the water column. Therefore, local hydrodynamics could be one of the environmental factors affecting traits of C. chromis with repercussions at the population level. We compared the body condition, individual growth and body shapes of damselfish collected under two different hydrodynamic conditions (low ~10 cm s-1 vs. high ~20 cm s-1). Specimens showed higher body condition under high-hydrodynamics, where conditions offered greater amounts of food, which were able to support larger individuals. Individuals smaller than 60-mm were more abundant under low-hydrodynamics. Morphometric analysis revealed that high-hydrodynamics were favored by fish with a more fusiform body shape and body traits developed for propellant swimming.

AB - The Mediterranean damselfish Chromis chromis is a species with a broad distribution found both in the Mediterranean Sea and Eastern Atlantic as far south as the coast of Angola. We hypothesized that the species may have significant functional morphological plasticity to adapt along a gradient of environmental conditions. It is a non-migratory zooplanktivorous species and spends the daytime searching for food in the middle of the water column. Therefore, local hydrodynamics could be one of the environmental factors affecting traits of C. chromis with repercussions at the population level. We compared the body condition, individual growth and body shapes of damselfish collected under two different hydrodynamic conditions (low ~10 cm s-1 vs. high ~20 cm s-1). Specimens showed higher body condition under high-hydrodynamics, where conditions offered greater amounts of food, which were able to support larger individuals. Individuals smaller than 60-mm were more abundant under low-hydrodynamics. Morphometric analysis revealed that high-hydrodynamics were favored by fish with a more fusiform body shape and body traits developed for propellant swimming.

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