TCC - Engenharia de Pesca (Sede)
URI permanente para esta coleçãohttps://arandu.ufrpe.br/handle/123456789/439
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Resultados da Pesquisa
Item Produção do camarão-rosa, Penaeus subtilis (Pérez-Farfante – 1967) e P. brasiliensis (Latreille - 1817), camarão-sete-barbas (Xiphopenaeus kroyeri - Heller, 1862) e o camarão-branco (Penaeus schmitti - Burkenroad, 1938) relacionados à pluviometria e sazonalidade na Barra de Sirinhaém, Pernambuco, Brasil(2019-06-19) Calheiros, Barbara Ferreira Fragoso; Oliveira, Vanildo Souza de; http://lattes.cnpq.br/4724844442437274; http://lattes.cnpq.br/0705353773545871The greatest expressiveness of shrimp catches on the coast of Pernambuco is concentrated in three main genera: pink shrimp, Penaeus subtilis (Pérez-Farfante – 1967) and P. brasiliensis (Latreille – 1817), seabob shrimp (Xiphopenaeus kroyeri - HELLER, 1862) and white shrimp (Penaeus schmitti - BURKENROAD, 1938) (ANDRADE, 2016). The objective of this monograph is to analyze the production of shrimp trawling and bycatch in terms of seasonality (winter/summer) and rainfall in Barra de Sirinhaém. The collections were carried out monthly from May 2017 to November 2018 on an artisanal double rig shrimp boat. To compare the production of shrimps and bycatch, a monthly ratio between catches was made by means of the average proportion, in kilograms. In order to determine the period of higher productivity of shrimps, the monthly proportion of kilograms caught was compared and correlated with rainfall data (Spearman - p<0.05), using the accumulated averages for better characterization of the rainy season and summer. The parametric test, the Student's t-test, was used to compare the means and obtain the level of significance. In order to determine a relationship between shrimp production and seasonality, the monthly proportion of kg of shrimp caught was compared and correlated with the winter and summer periods. The shrimp production peaks of the three species are related to the annual rainfall peaks. The shrimp production in August 2017 surpassed the bycatch. The capture of pink shrimp, was the one that obtained significant variation in relation to the production between seasons. The seabob shrimp was the one that obtained the highest catch in kilograms and the highest abundance in the summer. The results of this work were important to generate the first information on shrimp production related to rainfall and seasonality of the southern coast of Pernambuco, contributing to the detection of sites with richness of species relevant for capture, for the conservation of shrimp and bycatch species, in addition to assisting in the targeting of fishing and control measures.Item Avaliação da situação dos estoques de camarões capturados comercialmente no nordeste do Brasil com métodos para dados limitados(2019-06-28) Silva, Matheus Lourenço Soares da; Andrade, Humber Agrelli de; http://lattes.cnpq.br/5938373350418153The aim of this study was to evaluate the stocks situation of the most penaeidae species catched and propose management measures for Northeast region stocks. For this, available data about catch and growth were analyzed for these species. First of all, the overall catch was analyzed over the years and state of the fisheries assessed using data poor models. The results showed that Northeast shrimp fishing growing over the years and about caught species, pink shrimp (Penaeus Subtilis) have a first catch length around Lc = 9 cm, giving yield per recruit of Y/R = 1,08 g, fishing mortality Fmsy = 4,9, with catches below first maturation length (L50), giving a Maximum Sustainable Yield around 532 t. For sea-bob shrimp (Xiphopenaeus Kroery) which is more abundant than others, was observed with Lc = 8 cm, a Y/R= 0,16 g, Fmsy=12, being catched above first maturation length (L50), showing Maximum Sustainable Yield around 7525 t. For white shrimp (Penaeus Schimitt) Lc = 10 cm, Y/R = 1,30 g, Fmsy = 6,2, with catches below the L50 and an estimated Maximum Sustainable Yield around 3300 t. In general, these fisheries are carried out without catch quotas, below first maturation length (L50) and high fishing mortality coefficients, but according to F and Lc combinations there have been no signs of declining yields or overfishing. Knowledge about maximum sustainable yield and yield per recruit can be useful for management decisions about these resources.Item Avaliação de dispositivos de exclusão com painel de malha quadrada em redes de arrasto para camarão, na frota de Sirinhaém - PE(2018) Nascimento, Erika Martha de Lima; Oliveira, Vanildo Souza de; http://lattes.cnpq.br/4724844442437274; http://lattes.cnpq.br/9750351541049029The capture of shrimp trawls has generated significant volumes of accompanying fauna and consequently environmental damage. Currently, one alternative that minimizes this impact is the use of exclusion devices. This work evaluated the efficiency of the square mesh device in different locations in the net. The trawls were carried out in Barra de Sirinhaém, Pernambuco. The experiments consisted of one-hour trawls and divided into two phases, comparing the fisherman's netfishing "RP" with a similar netfishing containing a square mesh panel in the body "MQC". The second phase compared the "RP" with the net containing a square mesh panel in the "MQS" bag. The "MQC" caught a larger volume of shrimp and fish, with no significant differences in weight for white shrimp (ρ = 0.808), red shrimp (ρ = 0.814), sea-bob shrimp (ρ = 0.675) and fish (ρ = 0.849) and "MQS" significantly decreased fish catch by weight (Ρ = 0.00942) and number (ρ = 0.000571) without affecting the production by weight of white shrimp (ρ = 0.159), red shrimp (ρ=0,981), sea-bob shrimp (ρ = 0.619). Regarding the most frequent length classes, "MQC" and "MQS" captured larger specimens of red shrimp and fish, compared to their "RP". The modifications in the nets allowed the escape of smaller individuals, and the use of the device in both places, did not affect significantly their shrimp production. The device with square meshes in the bag was the most efficient, presenting significant differences in fish exclusion, both in number and weight, thus being the most promising to be implemented.