What is the impact of trawling on shrimp assembly in marine coastal areas? A temporal analysis of populations at ecosystem level on the North Coast of São Paulo

• Grant number: 19/01308-5
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: June 01, 2020
• End date: May 31, 2023
• Field of knowledge: Biological Sciences - Zoology - Morphology of Recent Groups
• Principal Investigator: Rogério Caetano da Costa
• Grantee: Júlia Fernandes Perroca
• Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil
• Associated research grant: 18/13685-5 - Integrative analysis of the Brazilian fauna of decapod crustaceans: taxonomy, phylogenetic systematics, spermiotaxonomy, morphology of post-embryonic development, ecology and conservation, AP.BTA.TEM

Abstract

Shrimps are highly exploited resources in marine ecosystems because of their high commercial value and are a source of income for numerous fishermen on the southeastern coast of Brazil. Despite its social and economic importance, shrimp fishing is recognized as an activity that generates impacts, some of which are the disruption of the marine substratum and the high catch of non-target organisms from the fishing, due to the low selectivity of the trawl. Currently, these impacts are serious concerns of conservation agencies and the fishing industry worldwide, making ecological analyzes of exploited populations and ecosystems important demands for the management and sustainability of the activity. Long-term population analysis allows the identification of the absence or presence of variations in life-cycle, spatial-temporal distribution and ecosystem diversity patterns and whether these are due to such activity. Thus, in the present study the long-term variability of the abundance and biomass of the crustaceans X. kroyeri, A. longinaris, L. schmitti, P. muelleri, R. constrictus, F. paulensis, F. brasiliensis, S. dorsalis, N. schmitti and E. oplophoroides, species caught in trawling at the Ubatuba Cove, off the coast of São Paulo. In addition, the species diversity of crustaceans will be estimated in the study ecosystem and, later on, the temporal trends of these metrics will be evaluated. The data used will come from 30-minute monthly trawls at 4 sampling points, to be carried out from July 2019 to August 2020, together with data previously obtained at the same points (1995 - 2017) and with the same effort sample. The environmental data available for the whole sampling period and which will continue to be monitored are surface and bottom water temperature and salinity, organic matter content and sediment granulometry. The collected shrimp were and will be identified for the species, weighed (G), measured on carapace length (CCmm) and separated by sex. According to the obtained results, the statistical analyzes pertinent to each proposed objective will be carried out, trying to interpret possible population variations in function of the environmental factors and the effects of the fishing in the diversity. (AU)

Scientific publications

(7)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

PERROCA, JULIA FERNANDES; NOGUEIRA, CAIO SANTOS; CARVALHO-BATISTA, ABNER; COSTA, ROGERIO CAETANO. opulation dynamics of a hololimnetic population of the freshwater prawn Macrobrachium amazonicum (Heller, 1862) (Decapoda, Palaemonidae) in southeastern Brazi. AQUATIC ECOLOGY, v. 56, n. 1, JUL 2021. (19/01308-5, 18/13685-5, 19/00661-3)

AZEVEDO-SANTOS, VALTER M.; BRITO, MARCELO F. G.; MANOEL, PEDRO S.; PERROCA, JULIA F.; RODRIGUES-FILHO, JORGE LUIZ; PASCHOAL, LUCAS R. P.; GONCALVES, GESLAINE R. L.; WOLF, MILENA R.; BLETTLER, MARTIN C. M.; ANDRADE, MARCELO C.; et al. Plastic pollution: A focus on freshwater biodiversity. AMBIO, v. 50, n. 7, SI, p. 1313-1324, JUL 2021. (19/01308-5)

PERROCA, JULIA FERNANDES; RODRIGUES FILHO, JORGE LUIZ; FRANSOZO, ADILSON; DA COSTA, ROGERIO CAETANO. Variations in pink-shrimps Farfantepenaeus brasiliensis and F. paulensis juvenile abundance: clarifying ecological patterns and providing subsidies to management in shallow marine ecosystems. Fisheries Research, v. 256, p. 15-pg., 2022-09-13. (19/01308-5, 17/00826-7, 98/07090-3, 18/13685-5)

JACONIS, MILENA SILVA; NOGUEIRA, CAIO SANTOS; MARTINS REZENDE-GOIS, GABRIEL VIEIRA; PERROCA, JULIA FERNANDES; COSTA, ROGERIO CAETANO. Relative growth and morphological sexual maturity of the crab Hepatus pudibundus (Herbst, 1785) (Decapoda: Aethridae) in southeast Brazil. INVERTEBRATE REPRODUCTION & DEVELOPMENT, v. N/A, p. 12-pg., 2022-11-11. (19/00661-3, 19/01308-5, 18/13685-5)

SALVATI, DALILLA DA SILVA; PERROCA, JULIA FERNANDES; SIMOES, SABRINA MORILHAS; CASTILHO, ANTONIO LEAO; DA COSTA, ROGERIO CAETANO. Variation in size distribution of juvenile pink shrimps Farfantepenaeus brasiliensis and F. paulensis in the estuarine-adjacent ocean area of Cananeia, south-eastern coast of Brazil. Journal of the Marine Biological Association of the United Kingdom, v. 101, n. 1, p. 117-129, FEB 2021. (10/50188-8, 18/13685-5, 19/01308-5, 15/15210-6)

NOGUEIRA, CAIO S.; PERROCA, JULIA F.; BATISTA, ABNER C.; COSTA, ROGERIO C.. Reproductive traits of the freshwater prawn Macrobrachium amazonicum (Decapoda: Palaemonidae) in an isolated water reservoir. Revista Mexicana de Biodiversidad, v. 91, OCT-DEC 2020. (19/00661-3, 18/13685-5, 19/01308-5)

PERROCA, JULIA FERNANDES; GIARRIZZO, TOMMASO; AZZURRO, ERNESTO; RODRIGUES-FILHO, JORGE LUIZ; SILVA, CAROLINA, V; ARCIFA, MARLENE S.; AZEVEDO-SANTOS, VALTER M.. Negative effects of ghost nets on Mediterranean biodiversity. AQUATIC ECOLOGY, v. N/A, p. 7-pg., 2022-10-13. (19/01308-5)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

PERROCA, Júlia Fernandes. What is the impact of trawling on shrimp assemblage in marine coastal areas? A temporal analysis of populations and ecosystems on the northern coast of São Paulo. 2023. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Instituto de Biociências. Botucatu Botucatu.