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Updated: Mar 28, 2026

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Modeling the Size Spectrum for Macroinvertebrates and Fishes in Stream Ecosystems

Published on: July 30, 2019

Fish functional traits are affected by hydrodynamics at small spatial scale.

C Bracciali¹, G Guzzo², C Giacoma³

¹Dipartimento di Scienze della Terra e del Mare, University of Palermo, Viale delle Scienze Ed. 16, 90128 Palermo, Italy; Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Turin, Italy.

Marine Environmental Research

|December 29, 2015

Summary

This summary is machine-generated.

The Mediterranean damselfish (Chromis chromis) exhibits functional morphological plasticity, adapting its body shape and condition to varying hydrodynamic environments. Higher water flow supports larger fish with more streamlined bodies for efficient swimming.

Keywords:

Body condition state Egadi marine protected area Growth Hydrodynamic variability Mediterranean Sea Mediterranean damselfish Morphometry

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Swimming Performance Assessment in Fishes

Swimming Performance Assessment in Fishes

Published on: May 20, 2011

Area of Science:

Marine biology
Ichthyology
Functional morphology

Background:

The Mediterranean damselfish (Chromis chromis) is widely distributed in the Mediterranean Sea and Eastern Atlantic.
This zooplanktivorous species forages in the water column, making it susceptible to local hydrodynamic conditions.
Hydrodynamics may influence the functional morphology and population dynamics of C. chromis.

Purpose of the Study:

To investigate the functional morphological plasticity of Chromis chromis in response to different hydrodynamic conditions.
To compare body condition, growth, and body shape of damselfish from low and high hydrodynamic environments.

Main Methods:

Collected Chromis chromis specimens from areas with low (∼10 cm s⁻¹) and high (∼20 cm s⁻¹) hydrodynamic conditions.
Assessed body condition, individual growth, and performed morphometric analysis to compare body shapes.

Main Results:

Damselfish in high-hydrodynamic environments exhibited better body condition and supported larger individuals.
Smaller individuals (<60 mm) were more prevalent in low-hydrodynamic areas.
High-hydrodynamics favored a more fusiform body shape associated with propellant swimming.

Conclusions:

Chromis chromis demonstrates significant adaptive plasticity in response to hydrodynamic forces.
Hydrodynamic conditions influence resource availability, affecting fish size and abundance.
Body shape adaptations in C. chromis are linked to optimizing swimming performance in different flow regimes.