DSpace Communidade:http://repositorio.ufc.br/handle/riufc/222772026-07-05T14:30:39Z2026-07-05T14:30:39ZEstudo da formação e variabilidade da pluma do Rio ParnaíbaMelo, Rebeca Crisóstomohttp://repositorio.ufc.br/handle/riufc/869892026-07-03T13:54:01Z2025-01-01T00:00:00ZTítulo: Estudo da formação e variabilidade da pluma do Rio Parnaíba
Autor(es): Melo, Rebeca Crisóstomo
Tipo: TCC2025-01-01T00:00:00ZSistemas de recirculação em aquicultura: perspectivas ambientais, produtivas e econômicas em comparação com sistemas de cultivo aquático convencionalLuciano, Maria Adryele dos Santoshttp://repositorio.ufc.br/handle/riufc/869792026-07-02T15:32:53Z2023-01-01T00:00:00ZTítulo: 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: TCC2023-01-01T00:00:00ZAspectos populacionais do caranguejo Guaiamum, Cardisoma guanhumi LATREILLE, 1828 (BRACHYURA: GECARCINIDAE), na zona estuarina do Rio Pacoti, Eusébio, CearáHolanda, Lucas Venturahttp://repositorio.ufc.br/handle/riufc/869782026-07-02T15:30:12Z2024-01-01T00:00:00ZTítulo: 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: TCC2024-01-01T00:00:00ZMaturação gonadal de fêmeas do camarão Penaeus vannamei com uso de dietas secas ricas em farinha de krillPinheiro, Eduardo Cerveira de Fariahttp://repositorio.ufc.br/handle/riufc/869772026-07-02T15:27:54Z2024-01-01T00:00:00ZTítulo: 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: TCC2024-01-01T00:00:00Z