%0 Journal Article %J Vertebrate Zoology %D 2017 %T Description of a new maternal larvophilic mouth-brooding cichlid species, Apistogramma megastoma sp. n. (Teleostei: Perciformes: Geophaginae), from Loreto, Peru %A Römer, CI %A Estivals, G %A Vela Diaz, A %A Fabrice Duponchelle %A Garcia Davila, C %A Hahn, I %A Renno, J-F %E Römer, U %B Vertebrate Zoology %V 67 %G eng %N 2 %0 Journal Article %J Vertebrate Zoology %D 2017 %T Description of a new maternal larvophilic mouth-brooding cichlid species, Apistogramma megastoma sp. n. (Teleostei: Perciformes: Geophaginae), from Loreto, Peru %A Römer, Uwe %A Römer, CI %A Estivals, G %A Vela Diaz, A. %A Fabrice Duponchelle %A Garcia Davila, C %A Hahn, I %A Renno, Jean-Francois %B Vertebrate Zoology %V 67 %G eng %N 2 %0 Journal Article %J Journal of Applied Ichthyology %D 2015 %T Description of the skeletal anatomy of reared juveniles of Pseudoplatystoma punctifer (Castelnau, 1855) with notes on skeletal anomalies %A Estivals, G %A Carmen García-Dávila %A Darias, Maria %X

This study aimed at describing the normal bony skeleton of Pseudoplatystoma punctifer juveniles to use as a reference when assessing the adequacy of nutritional and environmental conditions in experimental rearing during the early developmental stages and to provide a baseline for characterizing skeletal anomalies that might appear in rearing trials with this species. Fertilized eggs and newly hatched P. punctifer larvae were incubated at 27.8 ± 0.4°C in two 60-L tanks (50-L water volume) connected to a clear water recirculating system. At 3 days post fertilization – dpf (2 days post hatching – dph) larvae were reared in three 40-L tanks (30-L water volume; initial n = 2700 larvae per tank; 28.3 ± 0.4°C, pH 6.9 ± 0.2, dissolved oxygen 8.2 ± 0.5 mg L−1, N–NO2 0.04 ± 0.02 mg L−1, N–NH4 0.14 ± 0.05 mg L−1; 0L:24D photoperiod) and fed as follows: non-enriched Artemia spp. nauplii from 4 to 21 dpf (3–20 dph) and a commercial compound diet from 18 dpf onwards. Pseudoplatystoma punctifer juveniles (23.2 ± 5.5 mm standard length, SL, n = 58) were stained with alizarin red and their skeletal structures analysed and identified under stereoscope. Pseudoplatystoma punctifer presents an osseous skeleton typical of catfishes, consisting of a broad and depressed skull containing small eyes, 43–44 vertebrae (44 being the most frequent), a caudal fin complex composed of one epural, five hypurals, one parhypural and two hypurapophyses, dorsal and pectoral fins with spines and anal and adipose fins. The observed occurrence of several skeletal anomalies indicates that the rearing conditions might have been suboptimal.

%B Journal of Applied Ichthyology %V 31 %P 88–97 %G eng %U http://dx.doi.org/10.1111/jai.12983 %R 10.1111/jai.12983 %0 Journal Article %J Journal of Applied Ichthyology %D 2015 %T Influence of dietary protein and lipid levels on growth performance and the incidence of cannibalism in Pseudoplatystoma punctifer (Castelnau, 1855) larvae and early juveniles %A Darias, Maria %A Castro-Ruiz, D %A Estivals, G %A Quazuguel, Patrick %A Fernández, C %A Jesus Nuñez-Rodriguez %A Clota, F. %A Gilles, S %A García-Dávila, C %A Gisbert, E. %A Cahu, Chantal L %X

The aim of the study was to evaluate the influence of different dietary protein and lipid levels and their ratios on larval growth, survival and the incidence of cannibalism in Pseudoplatystoma punctifer. Larvae were raised in a recirculation system from 3 to 26 days post-fertilization (dpf) (2–25 days post hatching, dph) at an initial density of 40 larvae L−1, 27.8 ± 0.65°C and 0L : 24D photoperiod. Larvae were fed from 4 to 12 dpf with Artemia nauplii and weaned onto four different compound diets from 13 dpf within 3 days, then fed exclusively with these diets until 26 dpf. These diets contained 30 : 15, 30 : 10, 45 : 15 or 45 : 10 protein : lipid (P : L) (in % of dry matter) levels. A control group was fed Artemia nauplii until 17 dpf and weaned thereafter with the 45P : 10L compound diet. The experiment was carried out in triplicate. Results showed higher growth and survival rates and lower incidence of cannibalism in the group fed the 45P : 15L diet than in the other treatments. Differences in larval survival and growth performance were associated with the higher protein and lipid content rather than the protein : lipid ratio of this diet. When comparing diets with the same protein level, the increase in dietary lipid led to an improvement in growth, suggesting that energy from lipids spares protein for growth in P. punctifer fingerlings. An Artemia feeding period longer than 12 dpf did not improve larval growth or survival.

%B Journal of Applied Ichthyology %V 31 %P 74–82 %G eng %U http://dx.doi.org/10.1111/jai.12978 %R 10.1111/jai.12978 %0 Journal Article %J Journal of Applied Ichthyology %D 2015 %T Using barcoding of larvae for investigating the breeding seasons of pimelodid catfishes from the Marañon, Napo and Ucayali rivers in the Peruvian Amazon %A García-Dávila, C. %A Castro-Ruiz, Diana %A Renno, Jean-Francois %A Chota-Macuyama, Werner %A Carvajal-Vallejos, Fernando %A Sanchez, H. %A Angulo, C. %A Nolorbe, C. %A Alvarado, J. %A Estivals, G %A Jesus Nuñez-Rodriguez %A Fabrice Duponchelle %B Journal of Applied Ichthyology %V 31 %P 40–51 %G eng %U http://dx.doi.org/10.1111/jai.12987 %R 10.1111/jai.12987