Navegando por Autor "Matoso, Marcos Antonio Lima"

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Biologia reprodutiva de Neocallichirus maryae Karasawa, 2004 (Crustacea, Decapoda, Callichiridae) na praia de Mangue Seco, Igarassu, Pernambuco, Brasil
(2020-01-27) Matoso, Marcos Antonio Lima; Carvalho, Mônica Lúcia Botter; Costa, Larissa Bacelar da; http://lattes.cnpq.br/6227388035808608; http://lattes.cnpq.br/1762304533046987; http://lattes.cnpq.br/4408208899837080
The present work aims to study the reproductive biology of the ghost shrimp Neocallichirus maryae Karasawa, 2004, on the Mangue Seco beach, north coast of Pernambuco. Thus, intending to contribute with unprecedented information to fill this gap. Collections were carried out, monthly, at Mangue Seco beach during low tide, between September 2018 and October 2019. The females were collected using a manual suction pump and sieves. In the laboratory, the abundance of ovigerous females (OF) in relation to non-ovigerous females, the length of the cephalothorax (CF), size of sexual maturation, reproductive period, embryonic development stage, fecundity, egg volume and reproductive effort (RE) were analyzed. A total of 358 females were collected, 48 OF and 301 non-ovigerous females. The CF of non-ovigerous females ranged from 5.98 mm to 17.97 mm with an average of 13 mm (± 1.976), however for OF the measures ranged from 9.37 mm to 16.48 mm with 13.34 (± 1.970); defining the size of the sexual maturity as the FC measurements between 9mm and 9.5mm. The occurrence of reproductive period was observed during the dry season (between December / 2018 to March / 2019), which is expected as a standard for decapods. The 3 stages of embryonic development were found during the reproductive period. Fertility ranged from 1057 to 3784, with an average of 2001.4 ± 815.04. The number of eggs increased significantly following the size of the females. The average egg volume was 0.157 mm³ (± 0.021) for stage I, 0.091mm³ (± 0.038) for stage II and 0.065 mm³ (± 0.026) for stage III. The average ER was 0.0601 ± 0.241. With dry weight of the egg mass representing only 0.78% of the dry weight of the females. The aspects about reproductive biology studied for the population of N. maryae follow similar patterns to the other studies done for the group of ghost shrimp worldwide. Finally, this study brings new information about Neocallichirus maryae, filling in some gaps and enabling future research on the species.
Densidade e estrutura populacional do camarão-fantasma Callichirus corruptus (Hernáez, Miranda, Rio & Pinheiro, 2022) (Crustacea, Axiidea, Callichiridae) na praia da Conceição, Paulista - PE após um derramamento de petróleo
(2022-10-14) Silva, Wyllyane Gonçalves da; Carvalho, Mônica Lúcia Botter; Matoso, Marcos Antonio Lima; http://lattes.cnpq.br/4408208899837080; http://lattes.cnpq.br/1762304533046987; http://lattes.cnpq.br/2812513561673893
During 2019, oil slicks were observed on beaches on the coast of the Northeast region of Brazil and reached about a thousand kilometers off the Brazilian coast. The stains contaminated beaches, estuaries, reefs and mangroves and reached several organisms. This substance is capable of causing high mortality, decreased density and changes in the structure of marine communities. The crustaceans of the infraorder Axiidea, known as ghost shrimp, are burrowing marine organisms, considered important ecosystem engineers and widely used as bait for fishing. The study aimed to analyze the density and population structure of Callichirus corruptus on an oil-impacted beach in Pernambuco, in addition to comparing it with previous studies carried out in the area. Collections were carried out in the months of October/2020, December/2020, May/2021, February/2022, June/2022 and August/2022. The population density of C. corruptus on Conceição beach ranged from 0 to 28 ind/m², with an average density of 6.41 ind/m². Altogether 111 individuals were collected, 28 males and 83 females and 29 of them were ovigerous. The sex ratio was significantly biased towards females. Most individuals had an DO length of 10 to 13 mm, with significant differences between the sexes. For CP and LP There were no significant differences between males and females. The average fecundity was 3844.11 eggs. The present study brought new information from the population of Conceição beach and found that the 2019 oil spill may have caused a decrease in the number of individuals in the population. In view of this, we emphasize the importance of this and other studies related to environmental impacts to which burrowing shrimp are susceptible, as well as encouraging the continuity of research with ghost shrimp.