Fish functional traits are affected by hydrodynamics at small spatial scale

Bracciali, Claudia; Guzzo, Giovanni; Giacoma, Cristina; Dean, J. M.; Sarà, Gianluca

doi:10.1016/j.marenvres.2015.12.002

Cited by 10 publications

(16 citation statements)

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“…Bracciali et al . () suggested that local hydrodynamics might affect morphological traits of C. chromis with repercussions at the population level. Specimens showed higher body condition at localities with higher current speeds c .…”

Section: Chromis Chromis As a Predator On Zooplanktonmentioning

confidence: 99%

“…This could be due to entrapment and retention mechanisms of plankton in this region, mediated by physical processes. Bracciali et al (2016) suggested that local hydrodynamics might affect morphological traits of C. chromis with repercussions at the population level. Specimens showed higher body condition at localities with higher current speeds c. 20 cm s −1 ), where conditions offered greater amounts of food and which were able to support larger individuals.…”

Section: Chromis Chromis As a Predator On Zooplanktonmentioning

confidence: 99%

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Why the damselfishChromis chromisis a key species in theMediterranean rocky littoral – a quantitative perspective

Pinnegar

2018

Journal of Fish Biology

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The damselfish Chromis chromis is typically the most abundant fish species in the rocky littoral environment of the Mediterranean Sea, where it feeds in huge shoals on incoming zooplankton and rests near the seabed each night. Research has shown that large populations of C. chromis play a fundamental role by transferring carbon, nitrogen and phosphorus directly from the pelagic system to the littoral in the form of solid and liquid wastes and therefore that this species acts as a vital conduit for nutrients. In addition, C. chromis represents a major prey item for predatory fish and seabirds, it has been shown to exert significant predation pressure on coastal zooplankton populations, but it is also a major consumer of fish eggs and hence may have a strong influence on the dynamics of other fish species. In this review paper the contention is that C. chromis represents a key species in the Mediterranean Sea rocky littoral. This view is supported by quantitative evidence that has been amassed over a number of years, but is collated here for the first time. Chromis chromis is of only minor importance to commercial fisheries (it is usually discarded), but trends in population abundance of this species can be indicative of levels of fishing pressure on other commercial species. It has been demonstrated that where predator numbers are able to recover from intensive fishing (e.g.in marine protected areas; MPAs), this is often mirrored by lower densities of C. chromis. Several papers have championed C. chromis as a possible indicator species for human disturbance. As well as being directly and indirectly affected by fishing, the species is also sensitive to a number of other anthropogenic pressures, most notably poor water quality and noise pollution.

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Section: Chromis Chromis As a Predator On Zooplanktonmentioning

confidence: 99%

Section: Chromis Chromis As a Predator On Zooplanktonmentioning

confidence: 99%

Why the damselfishChromis chromisis a key species in theMediterranean rocky littoral – a quantitative perspective

Pinnegar

2018

Journal of Fish Biology

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“…Farm-associated seabream exhibited a more fusiform body shape overall, due to the deeper/wider anterior body, tapering towards the tail region (see Supplementary Figure 3). This observed body shape enables better resource exploration and reflects morphological adaptation that provide an advantage under high hydrodynamic water conditions (Bracciali et al, 2016). High variation in fin position indicates the adjustment in locomotor repertoires in concordance with foraging behaviour where fish was the preferred dietary category.…”

Section: Fish Body Shape Characteristics and Its Variation According To Habitat And Trophic Resourcesmentioning

confidence: 83%

Plastic Responses of Gilthead Seabream Sparus aurata to Wild and Aquaculture Pressured Environments

et al. 2021

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Fish farms, as artificial marine structures with a constant food supply, have a high capacity to attract surrounding wild fish. Different phenotypes of abundant gilthead seabream have been recorded in natural and aquaculture pressured environments in the eastern Adriatic Sea, where the influence of tuna farming on plastic traits associated with habitat use and foraging behaviour remains largely unknown. Several traits, such as body and otolith shape, external colouration, diet preference, and proximate tissue content, were analysed to examine habitat selection of the tuna farm-associated phenotype in comparison to wild and farmed phenotypes. Foraging behavioural shifts in prey selectivity, from hard-shelled bivalves towards soft textured baitfish feed, and local hydrodynamic conditions have initiated plastic responses in farm-associated seabream. Consequently, morphological traits connected with feeding and swimming performance and paler vs. vivid body colouration patterns differed between wild and farm-associated fish, highlighting the existence of resource polymorphism in gilthead seabream. While otolith shape proved to be a reliable phenotypic tracer in distinguishing farmed from wild and farm-associated fish, reduced sensitivity was found between individuals residing in the vicinity of tuna farms and wild ones. To fully understand the impact of fish farms on associated gilthead seabream and its plastic response with a distinctive morph outcome, the underlying molecular mechanisms involved in the regulation of alternative phenotypes needs to be investigated.

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“…Differences in the patterns of variation found in D. anale and D. petenense once again demonstrated that the phenotypic expression of morphological characteristics is a product of the interaction among diverse biological, environmental, and historic processes (Michel et al 2008;Franssen et al 2013;Bracciali et al 2016). Thus, there is a need to continue conducting studies of the fish communities within the Grijalva and Usumacinta basins.…”

Section: Discussionmentioning

confidence: 99%

Intraspecific morphological variation in shads, Dorosoma anale and D. petenense (Actinopterygii: Clupeiformes: Clupeidae), in the Mexican Grijalva and Usumacinta river basins

Macossay-Cortez¹,

Rodiles‐Hernández²,

González‐Díaz³

et al. 2022

AIeP

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Historical hydrological changes and the environmental characteristics of northern Middle America have promoted diversification and determined the distribution of fishes in the Grijalva and Usumacinta river basins of Mexico. In several taxa with wide distributions, cryptic diversity has been identified through molecular and morphological analyses. This study evaluated the intraspecific morphological variation of Dorosoma anale Meek, 1904 and Dorosoma petenense (Günther, 1867) along the Grijalva and Usumacinta river basins through geometric morphometric and linear biometric analyses. Little intraspecific differentiation was detected for either species. However, differences were identified between populations in the Grijalva basin and those from the upper Usumacinta River basins with respect to body height, head size, pelvic fin position, and anal fin size. The phenotypic expression of these attributes appears to be closely related to habitat type and geographic isolation. The morphological differences within D. petenense support the molecular hypothesis of two lineages existing in the Usumacinta River basin.

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Fish functional traits are affected by hydrodynamics at small spatial scale

Cited by 10 publications

References 50 publications

Why the damselfishChromis chromisis a key species in theMediterranean rocky littoral – a quantitative perspective

Why the damselfishChromis chromisis a key species in theMediterranean rocky littoral – a quantitative perspective

Plastic Responses of Gilthead Seabream Sparus aurata to Wild and Aquaculture Pressured Environments

Intraspecific morphological variation in shads, Dorosoma anale and D. petenense (Actinopterygii: Clupeiformes: Clupeidae), in the Mexican Grijalva and Usumacinta river basins

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Fish functional traits are affected by hydrodynamics at small spatial scale

Cited by 10 publications

References 50 publications

Why the damselfishChromis chromisis a key species in theMediterranean rocky littoral – a quantitative perspective

Why the damselfishChromis chromisis a key species in theMediterranean rocky littoral – a quantitative perspective

Plastic Responses of Gilthead Seabream Sparus aurata to Wild and Aquaculture Pressured Environments

﻿Intraspecific morphological variation in shads, Dorosoma anale and D. petenense (Actinopterygii: Clupeiformes: Clupeidae), in the Mexican Grijalva and Usumacinta river basins

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Intraspecific morphological variation in shads, Dorosoma anale and D. petenense (Actinopterygii: Clupeiformes: Clupeidae), in the Mexican Grijalva and Usumacinta river basins