Abstract:The influence of the moon cycles on the ichthyofauna has been little studied in the surf zone. In this study, the number of species, density and biomass were evaluated as a function of the moon. A total of 49 species distributed in 24 families were captured in two areas of Miramar beach. The mean density was significant high in the weaning and low in the new moon, while density and biomass together showed differences for areas. The most abundant species were Anchoa tricolor and Trachinotus falcatus (new moon),… Show more
“…The characteristic fauna and flora of the estuarine environment have considerable biological importance and are also exploited by the population for consumption and sales. Thus, the estuary has both ecological importance and socioeconomic relevance for the local population as an area for artisanal fishing as well as tourism and harbor activities (Ferreira et al, 2017;Pessoa et al, 2019). This environment is situated in a metropolitan region with more than one million residents (IBGE, 2010) as well as large sugarcane plantations and shrimp farms (Dolbeth et al, 2016;Teixeira et al, 2020), sewage inputs from the cities of João Pessoa, Cabedelo and Lucena (70.8%, 51.1% and 29.7%, respectively) (IBGE, 2010) and impacts from dredging activities and shipping traffic related to the Cabedelo Harbor downstream.…”
The aquatic environment has suffered anthropic impacts through inadequate dumping from domestic, agricultural and industrial sources. Such waste products become fragmented into microplastics (MPs) which accumulate in these ecosystems and cause impact. This study offers the first evaluation of contamination of the surface water by MPs in the Paraíba River estuary, Paraíba State, northeast Brazil. Monthly surface water samples were performed with a phytoplankton net from March 2019 to February 2020, between Restinga Island and the Cabedelo Harbor, downstream of the estuary. About the abiotic factors tested, tide height and precipitation were inversely proportional to MPs abundance at the water surface. While water transparency, wind speed and direction and volume of filtered water did not affect it significantly. A total of 443 MPs were obtained in 1116.26 m3 of filtered water, with a mean abundance of 1.96 ± 1.44 MP/m3, ranging from 0.33 (September) to 4.76 (January). The results reveal an important incidence of MPs pollution downstream in this system. The predominance of MPs fibers (51%) and fragments (48%) result from the slow, natural breakdown of solid waste, confirming the lack of the proper discarding to trash in the João Pessoa metropolitan region. These findings underscore the need for the implementation of simple mitigating measures, such as basic sanitation to reduce local pollution as well as effective routine assessments from the anthropic impact and from water quality control measures in this and many other Brazilian estuaries.
“…The characteristic fauna and flora of the estuarine environment have considerable biological importance and are also exploited by the population for consumption and sales. Thus, the estuary has both ecological importance and socioeconomic relevance for the local population as an area for artisanal fishing as well as tourism and harbor activities (Ferreira et al, 2017;Pessoa et al, 2019). This environment is situated in a metropolitan region with more than one million residents (IBGE, 2010) as well as large sugarcane plantations and shrimp farms (Dolbeth et al, 2016;Teixeira et al, 2020), sewage inputs from the cities of João Pessoa, Cabedelo and Lucena (70.8%, 51.1% and 29.7%, respectively) (IBGE, 2010) and impacts from dredging activities and shipping traffic related to the Cabedelo Harbor downstream.…”
The aquatic environment has suffered anthropic impacts through inadequate dumping from domestic, agricultural and industrial sources. Such waste products become fragmented into microplastics (MPs) which accumulate in these ecosystems and cause impact. This study offers the first evaluation of contamination of the surface water by MPs in the Paraíba River estuary, Paraíba State, northeast Brazil. Monthly surface water samples were performed with a phytoplankton net from March 2019 to February 2020, between Restinga Island and the Cabedelo Harbor, downstream of the estuary. About the abiotic factors tested, tide height and precipitation were inversely proportional to MPs abundance at the water surface. While water transparency, wind speed and direction and volume of filtered water did not affect it significantly. A total of 443 MPs were obtained in 1116.26 m3 of filtered water, with a mean abundance of 1.96 ± 1.44 MP/m3, ranging from 0.33 (September) to 4.76 (January). The results reveal an important incidence of MPs pollution downstream in this system. The predominance of MPs fibers (51%) and fragments (48%) result from the slow, natural breakdown of solid waste, confirming the lack of the proper discarding to trash in the João Pessoa metropolitan region. These findings underscore the need for the implementation of simple mitigating measures, such as basic sanitation to reduce local pollution as well as effective routine assessments from the anthropic impact and from water quality control measures in this and many other Brazilian estuaries.
“…The surf zone is a dynamic coastal ecosystem that changes with the tides and is defined mainly as the external limit of the wave breaking area. This feature is important for the control of the physicochemical aspects of the coastline, and consequently for the local fauna structure (McLachlan et al, 1981;Godefroid et al, 2001;Vasconcellos et al, 2007;Pessoa et al, 2019).…”
This study aims to analyze the length-weight relationship (LWR) of 22 fish species collected in the surf zone of Ponta de Pedras, northern coast of Pernambuco, Northeastern Brazil. The specimens were collected between August 2013 and July 2014 using a beach seine net, and their biometry were recorded in laboratory. The LWR was calculated using linear regression and, confidence intervals were estimated for the regression parameters a and b. A total of 1,433 specimens belonging to 22 species, 12 families, and six orders were collected. All species had b values within the expected range of 2.5-3.5 (except for S. plagusia). Additionally, 11 species have hyperallometry, eight have isometry, and three have hypoallometry. Herein, we present values of LWR for Lycengraulis grossidens, Trachinotus goodei, and Umbrina coroides, which are new to Northeastern Brazil, and Albula vulpes and Sparisoma radius which are new for the Brazilian coast.
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