Desempenho zootécnico dos camarões: Litopenaeus vannamei e Macrobrachium rosenbergii em tanques rede e aquicultura familiar na comunidade de Bebida-Velha, RN
The study aims to evaluate the performance and identify lesions of agonistic interactions of Macrobrachium rosenbergii in different densities cages (chapter 1); compare the growth performance of shrimp M. rosenbergii and Litopenaus vannamei cages (chatper 2); in addition the study aimed at identi...
Na minha lista:
| Autor principal: | |
|---|---|
| Outros Autores: | |
| Formato: | Dissertação |
| Idioma: | por |
| Publicado em: |
Universidade Federal do Rio Grande do Norte
|
| Assuntos: | |
| Endereço do item: | https://repositorio.ufrn.br/jspui/handle/123456789/20048 |
| Tags: |
Adicionar Tag
Sem tags, seja o primeiro a adicionar uma tag!
|
| Resumo: | The study aims to evaluate the performance and identify lesions of agonistic interactions of
Macrobrachium rosenbergii in different densities cages (chapter 1); compare the growth
performance of shrimp M. rosenbergii and Litopenaus vannamei cages (chatper 2); in addition
the study aimed at identifying the knowledge and practices of a traditional community of
farmers Bebida-Velha, in the city of Pureza / RN, practicing rural family and aquaculture, as
well as tracing the community socioeconomic profile and evaluate the management that these
farmers use in shrimp farming Macrobrachium rosenbergii (chapter 3). To perform the
experiments (chapter 1 and 2) shrimp species L. vannamei and M. rosenbergii were weighed
on a digital scale and transferred to cultures in cages. The cages had 1m³, with 5mm mesh
between us and were closed on top with screen to avoid predators (birds, insects). The animals
remained in adaptation for fifteen days before the start of data collection (each experiment).
Both experiments lasted seventy days, totaling eighty-five days cultivation. During the
cultures, animals were fed pelleted feed for shrimp at 10% of their biomass with 35% crude
protein, offered in feed trays twice a day during the hours (7:00 am and 14:00 pm). The
remnants in the tray were removed after 2h of permanence to calculate intake. To determine
the performance parameters, some samples were taken every 10 days. The results of both
experiments were analyzed using the STATISTIC 7.0 (2004). In Chapter 1 experiment were
applied5 treatments were applied with 5 replications each: D5 - 5 animals/m2
; D10 - 10
animals/m2
; D15 - 15 animals/m2
; D20 - 20 animals/m2
; D25 - 25 animals/m2
. To this, were
distributed 25 cages randomly in two masonry nurseries. The end of the experiment the
lesions were verified and quantified. The chapter 2 experiment began when the shrimp
reached the same age (eighty-four days) and was used the density of 25 shrimp / m2 with 4
repetitions. For the realization of chapter 3 were applied semi-structured interviews by direct
approach of Bebida Velha of settlers practicing aquaculture activity, tilapia producers and
community shrimp. Data were tabulated and analyzed according to the responses obtained by
the participants. Therefore, the amount of damage increased with increasing stocking density.
The density of 10 freshwater shrimp/m² showed the best conditions for a better performance
in cages. It can be concluded that in cages, the cultivation of species of fresh water shrimp M.
rosenbergii had better zootechnical indexes than the cultivation of marine shrimp species L.
9
vannamei. It was possible to verify that the activities of which the interviewees practice
guarantee a good quality of life and income for them. We find that respondents have
traditional and local knowledge, and also may be interested in the cultivation of the species M.
rosenbergii. |
|---|