Feeding Habits of <i>Trisopterus minutus capelanus</i> (Gadidae) Off the Eastern Coast of Spain (Western Mediterranean)

Morte, Maria Salomé; Redón, Manuel J.; Sanz-Brau, A.

doi:10.1046/j.1439-0485.2001.01731.x

Cited by 16 publications

(18 citation statements)

References 24 publications

(34 reference statements)

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“…Our data are consistent with those of Vivó and Sanz () and Morte et al. (), who reported that smaller T. draco specimens in the Gulf of Valencia consumed more mysids, often switching to decapods and telosts as the fish increased in length. These results are in line with an ecological strategy that reduces intraspecific competition for food in a population.…”

Section: Discussionsupporting

confidence: 93%

“…draco collected from the Gulf of Valencia by Morte et al. () support this generalistic behaviour. Vivó and Sanz (), who sampled in the same area, also reported a diversity of benthic prey species.…”

Section: Discussionmentioning

confidence: 72%

“…Based on the total IRI, other prey groups (cephalopods, bivalves, isopods and amphipods) were of lesser importance. In contrast, Viv o and Sanz (1989) and Morte et al (1999) found that mysids dominated the stomach contents of T. draco in the Gulf of Valencia, western Mediterranean. These authors also reported that decapods were an important prey group, while fishes constituted secondary prey items.…”

Section: Discussionmentioning

confidence: 91%

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Diet composition of greater weever,Trachinus draco(Linnaeus, 1758) captured in the eastern-central Adriatic Sea in relation to fish size, season and sampling area

et al. 2016

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The diet compositions of greater weever, Trachinus draco, from the eastern-central Adriatic Sea, were investigated with respect to seasons, fish size and sampling locations. Analyzed were the stomach contents of 592 specimens, total length (TL) of 9.9-31.2 cm, collected by commercial bottom trawls from January to December 2008. The frequency of empty stomachs varied significantly with the season (43.3% maximum during winter; 6.8% minimum during summer). Prey items identified in the stomachs belonged to seven major taxonomic groups: Bivalvia, Cephalopoda, Decapoda, Mysidacea, Isopoda, Amphipoda and Teleostei. Decapods were the most important prey (%IRI = 72.8) followed by teleosts (%IRI = 16.4) and mysids (%IRI = 15.0); other prey groups were only occasionally ingested. Diet composition showed little seasonal variation; decapods were the most important prey in all seasons. Fish size was the most important factor influencing the composition of the diet. Small individuals (<15 cm TL) fed primarily on small crustaceans (mysids), whereas larger fish consumed bigger prey, such as decapods, teleosts and cephalopods. There was high dietary similarity between sampling locations. Based on the diet, greater weever can be a considered a generalistic predator.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 91%

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Diet composition of greater weever,Trachinus draco(Linnaeus, 1758) captured in the eastern-central Adriatic Sea in relation to fish size, season and sampling area

et al. 2016

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“…This indicates that the observed seasonal variations in food ingestion are related to fluctuations of the prey in the environment. Although no data are available for the study area with regard to prey availability, previous studies in the Gulf of Valencia on the feeding habits of several fish point out that several prey species, such as L. gracilis, A. glaber, L. depurator, G. rhomboides and L. friesii , occurred more frequently in the stomach contents of benthic fishes (Vivó & Sanz, 1989; Redón et al , 1994; Morte et al , 1997a, 1997b, 1999a, 1999b). The observed seasonal change, besides the diet variations due to fish size, could also be due to depth of sampling.…”

Section: Discussionmentioning

confidence: 94%

Diet of Phycis blennoides (Gadidae) in Relation to Fish Size and Season in the Western Mediterranean (Spain)

2002

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Abstract. Despite its commercial value, little is known about the feeding ecology of the greater forkbeard, Phycis blennoides (Brünnich 1768). The stomach contents of 2631 greater forkbeard were taken at monthly intervals off the coast of the Gulf of Valencia (western Mediterranean). They were examined in order to assess the diet and to determine the fish size‐ and season‐related dietary variation of the species. Prey items were identified to the lowest taxonomic level possible. The basic food consisted of epibenthic species, mostly Decapoda, Mysidacea and Teleostei. A change in food composition based on fish size was observed and seasonal variation in diet was also recorded. The food overlap analysis indicated a high convergence in diet among similar size groups.

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“…Only Salpa sp. (Andersen & Nival 1988), Cotylorhiza tuberculata (Pérez-Ruzafa et al 2002) and Sarpa salpa (Peirano et al 2001) forage directly on the primary sources, while the remaining jellyfish (Malej 1989) and fish (Roux 1986, Cardinale et al 1997, Morte et al 1999, Stergiou & Karpouzi 2002 Statistical analyses. Multivariate analysis of variance (MANOVA) with 4 fixed factors (decaying blades of Posidonia oceanica, epiphytes, POM and Cystoseira balearica) was used to test whether the 4 sources considered shared a common bivariate isotopic signal.…”

Section: Methodsmentioning

confidence: 99%

Meadows of the seagrass Posidonia oceanica are a significant source of organic matter for adjoining ecosystems

Cardona¹,

Revelles²,

Sales³

et al. 2007

Mar. Ecol. Prog. Ser.

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Stable isotopes of carbon and nitrogen were used to assess the relevance of 4 primary carbon sources (the macroalga Cystoseira balearica, decaying blades of the seagrass Posidonia oceanica, seagrass epiphytes and pelagic particulate organic matter [POM]) for consumers inhabiting 3 adjoining subtidal habitats in the Western Mediterranean: seagrass meadows, unvegetated sandy patches and the overlying pelagic ecosystem. MANOVA and ANOVA revealed statistically significant differences between the δ 13 C signal of decaying blades of P. oceanica (-13.0 ± 0.6 ‰), epiphytes (-19.7 ± 0.4 ‰) and a third group including POM (-23.1 ± 0.3 ‰) and C. balearica (-22.7 ± 0.8 ‰). However, these primary sources did not differ in their δ 15 N signals (average: 1.0 ‰; range: 0.8 to 1.2 ‰). IsoSource mixing model software was used to calculate the contribution of each primary source to the carbon assimilated by each animal species. Nested ANOVA showed that the 3 trophic webs differed in the average contribution of the decaying blades of P. oceanica to the carbon assimilated by animals. The average contribution was 46.0 ± 14.0% for meadow-dwelling species, 18.3 ± 6.0% for sand-dwelling species and 12.8 ± 3.0% for pelagic species, once zooxanthellae-bearing jellyfish were removed from the analysis. However, IsoSource provided solutions for all the pelagic species and for half the sand-dwelling species that do not use decaying blades of P. oceanica as a carbon source. Conversely, IsoSource identified the decaying blades of P. oceanica as a relevant carbon source in all the solutions calculated for 3 different sand-dwelling species and in all of the meadowdwelling species. Thus, we conclude that organic detritus from P. oceanica is a relevant carbon source for species inhabiting seagrass meadows and for those sand-dwelling species living close to the meadows, but not for species exploiting deeper and more distant unvegetated patches. KEY WORDS: Detritus · Export · Seagrass meadows · Stable-isotope analysisResale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 335: 123-131, 2007 extremely high (Cebrián et al. 1997), but only a small fraction of it is consumed by local herbivores (Cebrián et al. 1996;Mateo & Romero 1997, but see Tomas et al. 2005; most of it is actually exported as fine detritus or coarser debris to adjoining ecosystems, where it is thought to fuel detritus-based food webs (Boudouresque et al. 1994), although reliable evidence is lacking. This export process is thought to be more important in the unvegetated sandy patches scattered within the meadows and adjoining the lower fringe of the meadows than elsewhere (Boudouresque et al. 1994). However, the relevance of seagrass detritus as a carbon source for unvegetated areas close to the seagrass beds has never been carefully investigated, despite recent efforts devoted to assessing the relevance of several carbon sources in the food webs of Mediterranean ecosystems (Dauby 1989, Jennings et al. 1997, Lepoint et al. 2000, P...

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Feeding Habits of Trisopterus minutus capelanus (Gadidae) Off the Eastern Coast of Spain (Western Mediterranean)

Cited by 16 publications

References 24 publications

Diet composition of greater weever,Trachinus draco(Linnaeus, 1758) captured in the eastern-central Adriatic Sea in relation to fish size, season and sampling area

Diet composition of greater weever,Trachinus draco(Linnaeus, 1758) captured in the eastern-central Adriatic Sea in relation to fish size, season and sampling area

Diet of Phycis blennoides (Gadidae) in Relation to Fish Size and Season in the Western Mediterranean (Spain)

Meadows of the seagrass Posidonia oceanica are a significant source of organic matter for adjoining ecosystems

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