Navegando por Assunto "Reprodução"

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Comparação de diferentes diluidores para o resfriamento de sêmen de carneiros deslanados criados no Sertão pernambucano
(2018) Souza, Nathaly Cristina de Menezes Sá; Martins, Jorge André Matias; http://lattes.cnpq.br/9617318260953422; http://lattes.cnpq.br/7212758908210077
Among the biotechniques applied to sheep reproduction, artificial insemination (AI) promotes greater impact on productive efficiency, due to its applicability and practicality, besides accelerating the genetic gain in the herd and controlling sanity more efficiently. The use of chilled semen may become viable to the producer since the material used and the procedures are more accessible, making possible the transport of genetic material between properties. For this purpose, semen extenders aim to improve the conservation of spermatozoa by making longer their viability outside the reproductive tract. Thus, the objective of the present study was to evaluate the technical viability of 4 extenders for the cooling of semen of rams raised in the backwoods of Pernambuco. Nine rams were subjected to semen collection and analysis, of which only 6 presented good semen traits for cooling. Ejaculates were divided into equal fractions and diluted with physiological saline, sucrose, skim milk and tris-egg yolk media, obtaining 30 million sperm/dose for each extender. The diluted samples were chilled in a refrigerator at 5 °C for 4 hours when they were then packed in ice-containing thermal boxes for transportation to the UAST chemistry laboratory. All samples were evaluated for motility, vigor and sperm morphology after 24, 48 and 72 hours of cooling. The tris-egg yolk extender was the only one able to keep sperm motile for at least 72 hours, but with motility and vigor appropriate for insemination for up to 48 hours. Moreover, such extender did not alter the sperm morphology, presenting good sperm preservation. One can conclude that the tris-egg yolk extender is technically feasible for the use and diffusion of artificial insemination in sheep raised in the backlands ofPernambuco.
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.