http://repositorio.ufc.br/handle/riufc/22277 Sun, 05 Jul 2026 08:42:23 GMT 2026-07-05T08:42:23Z http://repositorio.ufc.br/handle/riufc/86989 Título: Estudo da formação e variabilidade da pluma do Rio Parnaíba Autor(es): Melo, Rebeca Crisóstomo Tipo: TCC Wed, 01 Jan 2025 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/86989 2025-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86979 Título: Sistemas de recirculação em aquicultura: perspectivas ambientais, produtivas e econômicas em comparação com sistemas de cultivo aquático convencional Autor(es): Luciano, Maria Adryele dos Santos Abstract: The expansion of aquaculture is necessary to meet a growing market for quality fish, however, it needs to be on an environmentally sustainable basis. The objective of this study was to analyze, from environmental, productive and profitable perspectives, recirculation systems in aquaculture, comparing them with conventional farming systems in order to contribute to decision-making for more sustainable systems. To this end, various scientific research, reports and case studies related to the topic were reviewed. The results indicated that recirculation systems in aquaculture present significant advantages in terms of reducing water consumption, efficiency in the use of resources, water quality control and minimization of environmental impact. Furthermore, these systems allow greater control over breeding conditions, resulting in more stable and predictable production. In terms of profitability, although initial implementation costs are higher, recirculation systems have the potential to generate more consistent financial returns in the long term. However, it is important to consider the particularities of each species and local conditions to evaluate the application of these systems. It is concluded that recirculation systems in aquaculture represent a promising and sustainable alternative for aquaculture crops, providing benefits to production, profitability and the environment. Tipo: TCC Sun, 01 Jan 2023 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/86979 2023-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86978 Título: Aspectos populacionais do caranguejo Guaiamum, Cardisoma guanhumi LATREILLE, 1828 (BRACHYURA: GECARCINIDAE), na zona estuarina do Rio Pacoti, Eusébio, Ceará Autor(es): Holanda, Lucas Ventura Abstract: The fishing market focuses its economy on the trade of fish and other aquatic organisms, including crustaceans, which constitute a group of great socioeconomic importance. Due to excessive fishing, the overexploitation of fishery resources affects the natural balance of species, leading to a significant reduction in their reproductive capacity and abundance. Cardisoma guanhumi (Latreille, 1828) is one of the main crustaceans previously commercialized in the Northeast of Brazil, being classified as a target species of overfishing, which has caused a decrease in its population, currently classified as vulnerable. Its habitat can vary, ranging from mangroves to transition environments such as salt flats (apicuns) and even drier areas farther from the coast, such as "tabuleiro" forests and urbanized regions, often associated with the local vegetation due to their feeding habits. Their semi-terrestrial habits and distinctive coloration patterns set them apart from other crabs. However, research on their occurrence, distribution, and population biology is still scarce in the scientific literature, which hampers proper species management. Therefore, this study aims to map the occurrence and analyze the population aspects of the guaiamum crab. The study area is located at the Environmental Protection Area (APA) of the Pacoti River estuary. From May to October 2023, animal captures were conducted using "ratoeira” traps, along with measurements of the burrow opening diameter and georeferenced photographic records. Shading conditions, access to water, and food availability seem to directly influence the distribution of C. guanhumi in the region, with the burrows of C. guanhumi being concentrated mainly in areas close to the river. The 1:1 sex ratio indicated a balanced population, and the size at first morphological maturity was estimated at 47.9 mm, consistent with other studies. Three coloration patterns associated with the maturity stage of the crabs were identified, but there was no significant variation in the number of crabs in each of these patterns. The results obtained in this study suggest that shading conditions, access to water, and food availability directly influence the distribution of C. guanhumi, which is mainly concentrated in areas adjacent to the river.The mapping of C. guanhumi distribution not only expands academic knowledge about the species but also provides important insights for the adoption of conservation measures and proper management within the Pacoti River APA. Tipo: TCC Mon, 01 Jan 2024 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/86978 2024-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86977 Título: Maturação gonadal de fêmeas do camarão Penaeus vannamei com uso de dietas secas ricas em farinha de krill Autor(es): Pinheiro, Eduardo Cerveira de Faria Abstract: The gonadal maturation of breeding shrimp directly affects the fecundity and quality of the offspring. Traditionally, the maturation process relies on the use of fresh food such as squid, crustacean biomass and molluscs to provide mainly lipids necessary for the formation of the gonads. However, this practice presents challenges related to nutritional stability and biosecurity. The nutrients associated with the sexual maturation of crustaceans are mainly lipids, such as polyunsaturated fatty acids from the omega-3 series, phospholipids, cholesterol and astaxanthin. These elements are found in abundance in some marine ingredients, such as krill meal (KRM). The aim of this study was to evaluate the effect of dry diets containing KRM on the sexual maturation of female Penaeus vannamei. For the study, a total of 180 females, with a body weight (BW, mean ± standard deviation) of 31.90 ± 5.67 g, were stocked in 60 1 m3 tanks and kept in an open area at a density of 3 animals/m3. The shrimp were fed for 87 days, twice a day, with five diets, one of which was a control (commercial semi-moist, 40% crude protein, 9.5% lipids and 31% moisture) and four experimental diets produced in the laboratory. The experimental diets were formulated to meet a level of 51.0% crude protein and 14.6% lipids. KRM was included at 15, 30, 45 and 60% of the diet (% of diet, natural basis). The shrimp were individually identified and monitored every two weeks for CP gain and stage of maturation (I-V). At harvest, final survival (%), final BW (g) and hepatosomatic (HSI) and gonadosomatic (GSI) indices were determined. The shrimp reached 38.33 ± 5.89, 39.99 ± 5.38, 40.02 ± 5.63, 43.78 ± 6.14 and 40.16 ± 6.51g for the 15, 30, 45 and 60% KRM diets and the control, respectively. The type of diet did not influence BW (P> 0.05) and final survival (66.67 ± 21.98%). The HPT index was higher for shrimp fed the control diet with 15% (4.14 ± 0.66) and 60% KRM (4.89 ± 0.84) compared to the others. The GND index (1.05 ± 0.69) showed no statistical difference. It can be concluded that dry diets containing a minimum of 15% KRM are capable of providing the same productive performance and gonadal development compared to a semi-moist commercial diet. Future studies should be carried out to assess the ability of these diets to replace the use of fresh food for shrimp broodstock. Tipo: TCC Mon, 01 Jan 2024 00:00:00 GMT http://repositorio.ufc.br/handle/riufc/86977 2024-01-01T00:00:00Z