Biology of the Sanzo's goby, &lt;i&gt;Lesueurigobius sanzoi&lt;/i&gt; (de Buen, 1918), off Cabo Raso, Portugal

Although Arnoglossus laterna (Walbaum, 1792) is a common benthic fish in Portugal, several aspects of its feeding ecology remain incomplete. In this study, diet was examined and the food consumption estimated on inshore waters in the central coast of Portugal. The diet of the scaldfish included mainly mysids, amphipods and polychaetes, while the decapod Philocheras bispinosus Hailstone was the most frequent prey. Variation in the diet according to fish size (two size-classes), sex and spawning ⁄ non-spawning seasons was examined. Significant differences in diet composition were found between seasons, whereby the most frequently consumed prey in the non-spawning season were crustaceans, while polychaetes and nemerteneans comprised most of its diet in the spawning season. The average value of the vacuity index was very similar between seasons (24.7% non-spawning season and 25.0% spawning season). Diet overlap between size-classes and sexes was high, but low between the two seasons. Food consumption of A. laterna was estimated based on diet characterization and evacuation rate. The estimate of the daily food consumption was 1.15 mg dry weight for the nonspawning season and 1.67 mg dry weight for the spawning season. Significant differences in consumption rates were found between size-classes and sexes. Larger individuals showed a higher consumption rate than smaller individuals. Females consumed more food than males in the non-spawning season, while in the spawning season males consumed more than females.

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Variation of diet and food consumption of the scaldfish Arnoglossus laterna(Walbaum, 1792)

Paulo-Martins

Vinagre

Silva³

et al. 2011

Journal of Applied Ichthyology

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Geographical and bathymetric distribution of mysids (Crustacea: Mysida) <br />in the seas of the Iberian Peninsula

Vicente¹

2017

Zootaxa

509

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The zoogeographic distribution of mysid species occurring in the diverse seas of the Iberian Peninsula and neighbouring areas is analysed. For each species, bathymetric range and localities data are reported. A total of 129 mysid species belonging to 50 genera have been recorded, representing 11% of all known world extant species and the 28% of genera. Littoral mysids are the most diverse group (64 species) followed by the outer-self to upper-bathyal slope with 54 known species. Patterns of bathymetric zonation are characterized by four bathymetric discontinuities at about 100, 500, 1300 and 2700 m. Each geographical region is characterized by the presence of a mixture of exclusive and shared species composition. Mysid distributions suggest that an important grouping of species present in the Iberian fauna share a common origin. Based on the analysis of published records and reported species, it is suggested that there is a high probability of the discovery of new species of Mysida in the water surrounding the Iberian Peninsula.

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Biology of the Sanzo's goby, <i>Lesueurigobius sanzoi</i> (de Buen, 1918), off Cabo Raso, Portugal

Cited by 2 publications

References 12 publications

Variation of diet and food consumption of the scaldfish Arnoglossus laterna(Walbaum, 1792)

Variation of diet and food consumption of the scaldfish Arnoglossus laterna(Walbaum, 1792)

Geographical and bathymetric distribution of mysids (Crustacea: Mysida) <br />in the seas of the Iberian Peninsula

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