El presente artículo tuvo como objetivo analizar las condiciones culturales y socioeconómicas de las caletas pesqueras artesanales en Yacila (Piura) y Carquín (Lima), Perú. Se empleó una metodología de carácter cualitativo y de revisión sistemática, tipo básica y con un diseño descriptivo. Como técnicas de investigación se emplearon el diagrama de PRISMA, la matriz de registro de artículos y una tabla de distribución de artículos por base de datos. En sus resultados se evidenció que la pesca artesanal es una actividad practicada por tradición, reproduciéndose de generación en generación como un fin sociofamiliar que se recrea por cotidianidad o presión familiar. Se concluyó que en las caletas de Yacila y Carquín, la pesca artesanal es realizada por familias; en su mayoría por personas del sexo masculino, quienes, para cubrir las necesidades económicas, y debido a la falta de oportunidades laborales, deciden convertirla en su fuente de ingresos, ya que la mayoría de pecadores artesanales no poseen un apoyo gubernamental que les permita acceder a una estabilidad laboral, un salario digno, asistencia médica y condiciones óptimas.

This study describes, for the first time in the Peruvian Amazon, the complete embryonic development of Leporinus friderici (Bloch, 1794) following hormonal induction with two locally available inducers. Twelve sexually mature broodstock (six males and six females per treatment) maintained at 27.96 ± 0.36 °C were induced with buserelin acetate (0.008 mg·fish⁻¹; T1) or Arapaima gigas pituitary extract (0.50 + 3.00 mg·kg⁻¹; T2); a negative-control group received 0.90% NaCl. Both treatments produced a 100% ovulation rate and successful fertilization of all collected oocyte batches, whereas control specimens did not spawn. Embryogenesis was monitored continuously by bright-field microscopy (n=3 incubators; ×10 oocytes per incubator) and the main developmental stages zygote (00:10 hpf), cleavage (00:20–01:10 hpf), blastula and morula (01:20–03:15 hpf), gastrula (03:30–07:30 hpf), organogenesis (08:10–12:30 hpf) and hatching (13:30 hpf) were recorded in the format hh:mm. Egg and larval morphometry (hydrated egg 3.02 ± 0.05 mm, perivitelline space 0.96 ± 0.03 mm, yolk 1.24 ± 0.02 mm, distended larva 3.99 ± 0.28 mm) did not differ between treatments (one-way ANOVA, p > 0.05). These results establish the first complete ontogenetic reference for L. friderici under controlled hormonal induction in the Peruvian Amazon and support the operational use of either buserelin acetate or A. gigas pituitary extract in regional hatcheries; full validation of reproductive performance will require subsequent quantification of fertilization, hatching and larval survival rates.

Revista de revisión por pares de ciencia e ingeniería de carácter multidisciplinar centrada en la investigación y el desarrollo de diversos ámbitos relacionados con la sostenibilidad. Multidisciplinar peer review journal for science and engineering focused in research and development of different fields related withe the sustainability.

This study evaluated the effects of using brown seaweeds (Mycotox-algae) as a feed additive on the intestinal health of broiler chickens. Four hundred Cobb 500 chickens were used in four treatments (T1, T2, T3, T4; balanced feed with the addition of 0, 500, 750, 1000 g/t of brown macroalgae in the diet, respectively) in a 42-day experiment. Morphometric variables such as villus, mucosal, and intestinal crypt lengths, as well as the histology of the duodenum, jejunum, and ileum, were analysed. Treatment T4, with the highest concentration of macroalgae, showed a significant increase in villus and mucosal lengths compared to the other groups. Histological changes, such as epithelial erosion and thickening of the muscularis, were observed, which could have been influenced by the evaluation period and treatment-specific factors that may have modulated intestinal response. In conclusion, macroalgae supplementation in broiler chicken diets, particularly at higher concentrations (T4), improved intestinal morphometry, increasing villus, mucosa, and crypt length, which could improve intestinal health and nutrient absorption. However, signs of tissue damage were identified that could reflect adaptive responses of the intestine, related to adverse environmental conditions and differential susceptibility between each treatment.

This review synthesizes the available evidence on the effects of Hermetia illucens meal inclusion on the intestinal microbiota of fish. A literature search was conducted in Scopus, Web of Science, PubMed, and Embase from inception to 23 April 2025, including in vivo experimental studies reporting changes in fish intestinal microbiota. Of 2525 records identified, 39 studies met the predefined PICOS-based eligibility criteria and were included in a PRISMA 2020-guided synthesis; risk of bias was assessed using the SYRCLE tool. Given the substantial methodological heterogeneity among studies (fish species, dietary formulations, sequencing platforms, and analytical pipelines), no quantitative meta-analysis was performed, and results were synthesized semi-quantitatively based on the direction of reported effects. At the phylum level, most studies reported significant increases in Bacillota (41% vs. 16% decreases; n = 32) and Actinomycetota (65% increases; n = 26), while Pseudomonadota showed a recurrent, though not universal, reduction (50%; n = 28), with enrichment of genera such as Bacillus (70%; n = 20), Enterococcus (81%; n = 16), and Oceanobacillus (93%; n = 15). These changes have been hypothesized to involve prebiotic, metabolic, and antimicrobial mechanisms related to chitin, lauric acid, and antimicrobial peptides. Overall, H. illucens meal inclusion (~10–30%) appears to be associated with a predominant, though not universal, modulation of the fish intestinal microbiota toward profiles with greater fermentative and chitinolytic potential; an inference based on the ecological attributes of the enriched taxa rather than on functional measurements. The magnitude and consistency of this modulation depend on dose, species, habitat, and meal processing type.