Description of the Feeding Morphology and the Food Habits of Four Sympatric Labrids (Perciformes, Labridae) From South-Eastern Aegean Sea, Turkey

Kabasakal, Hakan

doi:10.1163/156854201x00206

Cited by 15 publications

(13 citation statements)

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“…Two labrids were selected as the study species, Coris julis and Thalassoma pavo as they are among of the most abundant and widespread reef wrasses in the Eastern Atlantic and Mediterranean coastal waters (Quignard & Pras 1986). Both species are demersal (Quignard & Pras 1986), with similar body size/shape, feeding strategies and diets (Kabakasal 2001). In general, benthic invertebrates are of importance in the feeding of these sympatric labrids, and crustaceans and gastropods are the major prey groups (Kabakasal 2001).…”

Section: Methodsmentioning

confidence: 99%

Vertical distribution of two sympatric labrid fishes in the Western Mediterranean and Eastern Atlantic rocky subtidal: local shore topography does matter

et al. 2011

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Changes in the shore topography (e.g. slope) occur at a scale of hundreds of\ud meters in several locations in the Lusitanian and the Mediterranean Sea provinces. We tested whether differences in the bottom inclination might affect the vertical distribution patterns of two sympatric coastal labrid fishes, the rainbow wrasse Coris julis and the ornate wrasse Thalassoma pavo. Visual censuses were used to determine the distribution and abundance of these labrid species in high (‡30 ) and low (£3 ) slope rocky substrates covered by brown macroalgae and at two different depths (shallow, 4–7 m, and deep 14–20 m). Pectoral fin aspect ratio was used as an estimate of swimming performance to potentially explain the patterns observed. Despite the intrinsic biogeographical differences in the overall density of T. pavo and C. julis, on steep coasts the ornate wrasse dominated in shallow waters, whereas the two species coexisted both in shallow and deeper depths on gentle slope coasts. These distribution patterns were consistent across locations, and fin aspect ratio was not a good predictor of between-habitat use for wrasses. We show that, under specific topographical conditions, the depth segregation pattern seems to be an interactive segregation (likely related to resource competition) rather than a result of selective segregation due to morphological differences in the pectoral fin. Significant ecological\ud changes might occur in locations where the density of T. pavo has recently\ud increased as a result of water warming

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Section: Methodsmentioning

confidence: 99%

Vertical distribution of two sympatric labrid fishes in the Western Mediterranean and Eastern Atlantic rocky subtidal: local shore topography does matter

et al. 2011

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“…Most studies of labrid diets have focused on either single species (Gillanders, 1995; Denny & Schiel, 2001; Shepherd & Clarkson, 2001; Figueiredo et al , 2005; Castriota et al , 2005, 2010) or a group of species in the same habitat (Kabasakal, 2001; MacArthur & Hyndes, 2007; Morton et al , 2008). Certain studies have shown that the relative abundance of the prey taxa ingested by labrids tends to reflect the relative abundance of those prey in the environment (Deady & Fives, 1995; Shepherd & Clarkson, 2001).…”

Section: Introductionmentioning

confidence: 99%

To what extent are the dietary compositions of three abundant, co‐occurring labrid species different and related to latitude, habitat, body size and season?

Lek

Fairclough

Platell

et al. 2011

Journal of Fish Biology

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This study demonstrated that the dietary compositions of each of three abundant reefassociated labrid species in temperate Western Australia differed significantly with latitude and changed with increasing body size and almost invariably differed among species when those species co-occurred. These results were derived from comparisons and multivariate analyses of volumetric dietary data, obtained from the foregut contents of Coris auricularis, Notolabrus parilus and Ophthalmolepis lineolatus from the Jurien Bay Marine Park (JBMP) and waters off Perth, 250 km to the south. Latitudinal differences in the dietary compositions of each species in exposed reefs reflected large crustaceans, bivalves, echinoids and/or annelids typically contributing more to the diet in waters off Perth than in the JBMP, whereas the reverse was true for gastropods and small crustaceans. The diet of each species exhibited similar, but not identical, quantitative changes with increasing body size, with the contributions of small crustaceans declining and those of large crustaceans and echinoids increasing, while that of gastropods underwent little change. Within the JBMP, the dietary compositions of both C. auricularis and N. parilus were similar in exposed and sheltered reefs and the same was true for N. parilus in the latter reefs and interspersed areas of seagrass. The latter similarity in the diets of N. parilus demonstrated that, in both of those divergent habitat types, this species forages on prey living in or on the sand covering and around reefs or on seagrass. Although the main dietary components of each species were the same, i.e. gastropods, small crustaceans (mainly amphipods and isopods), large crustaceans (particularly penaeids and brachyuran crabs) and echinoids, their contributions varied among those species, which accounts for the significant interspecific differences in diet. Coris auricularis had the most distinct diet, due mainly to an ingestion of greater volumes of small crustaceans, e.g. amphipods and isopods, and smaller volumes of large crustaceans, e.g. brachyuran crabs, which was associated with a relatively narrower mouth and smaller teeth and the absence of prominent canines at the rear of the jaw. The above intra-and interspecific differences in dietary composition would reduce, on the lower west coast of Australia, the potential for competition for food among and within these three abundant labrids, which all belong to the Julidine clade. Ethics questionnaire for JFBThis questionnaire relates to the Editorial published in JFB 68, 1-2, which you have been asked to read. Please note that submitted manuscripts will only be considered if the experimental methods employed are ethically justified. PLEASE SUBMIT THE COMPLETED QUESTIONNAIRE WITH YOUR MANUSCRIPT ONLINE THROUGH EDITORIAL MANAGER. Corresponding author's name: Ian C PotterQuestion 1: If the fishes have been collected as part of faunal surveys, have the fishes, where feasible, been killed rapidly or returned to the wild after being held in aqua...

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“…Such differences may be due to differences in the habitual prey preferentially targeted in the field by each predator. Thus, fishes such as C. julis, which usually feed on invertebrates provided with an external skeleton, such as mollusks, gastropods, bivalves, and crustaceans (Kabasakal 2001, Stergiou & Karpouzi 2002, may be more adapted to encountering calcareous structures in their diet.…”

Section: Discussionmentioning

confidence: 99%

“…The small bleniid fish (P. incognitus) captures small benthic animals in the field, while grazing the surface of rocky substrata and encrusting invertebrates (Goldschmid & Kotrschal 1981); thus, it might be adapted to ingest small amounts of potentially toxic species such as H. columella and C. crambe (Becerro et al 1997b) while capturing small invertebrates dwelling on sponges. The labrid C. julis is a voracious species that has been reported to predate on crustaceans and gastropod mollusks (Fasola et al 1997, Kabasakal 2001; apparently it also tolerates, to some extent, the bioactive compounds produced by the alga Caulerpa prolifera (Sureda et al 2006). Thus, the 2 latter fishes seem to show some resistance to the secondary metabolites of benthic invertebrates.…”

Section: Discussionmentioning

confidence: 99%

Calcareous spherules produced by intracellular symbiotic bacteria protect the sponge Hemimycale columella from predation better than secondary metabolites

Garate¹,

Blanquer

Uriz³

2015

Mar. Ecol. Prog. Ser.

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Benthic sessile organisms in general, and sponges in particular, have developed an array of defense mechanisms to survive in crowded, resource and/or space-limited environments. Indeed, various defense mechanisms may converge in sponges to accomplish a defensive function in an additive or synergetic way, or to operate at different times during the sponge's life cycle. Moreover, sponges harbor highly diverse microbial communities that contribute in several ways to the host's success. Although some symbiotic bacteria produce chemical compounds that protect the sponge from predation, the possible deterrent function exerted by the calcareous coat of a sponge's endosymbiotic bacterium has not, to date, been explored. Hemimycale columella is an Atlanto-Mediterranean sponge, which produces bioactive metabolites and has been reported to host an intracellular bacterium with a calcite envelope. Calcibacteria accumulate in high densities at the sponge periphery, forming a kind of sub-ectosomal cortex. They have been suggested to provide the sponge with several benefits, one of which is protection from predators. In this study, we assess the relative contribution of the endosymbiotic calcibacteria and bioactive compounds produced by H. columella to defend the sponge against sympatric predators. Deterrence experiments have revealed that the sponge combines >1 defense mechanism to dissuade a large array of potential predators; this represents an example of the evolutionary fixation of redundant mechanisms of defense. The chemicals deterred Paracentrotus lividus, Chromis chromis, Oblada melanura, and Diplodus vulgaris, but not Parablennius incognitus and Coris julis, while the spherules of the symbiotic calcibacteria significantly deterred all predators assayed.

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Description of the Feeding Morphology and the Food Habits of Four Sympatric Labrids (Perciformes, Labridae) From South-Eastern Aegean Sea, Turkey

Cited by 15 publications

References 0 publications

Vertical distribution of two sympatric labrid fishes in the Western Mediterranean and Eastern Atlantic rocky subtidal: local shore topography does matter

Vertical distribution of two sympatric labrid fishes in the Western Mediterranean and Eastern Atlantic rocky subtidal: local shore topography does matter

To what extent are the dietary compositions of three abundant, co‐occurring labrid species different and related to latitude, habitat, body size and season?

Calcareous spherules produced by intracellular symbiotic bacteria protect the sponge Hemimycale columella from predation better than secondary metabolites

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