early life stage
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2022 ◽  
Vol 22 ◽  
pp. 100996
Author(s):  
Paulo Salinas ◽  
Fernanda Molina ◽  
Nicolás Hernández ◽  
Carlos Sandoval

Processes ◽  
2022 ◽  
Vol 10 (1) ◽  
pp. 120
Author(s):  
Wenyu Miao ◽  
Lingling He ◽  
Tao Zhang ◽  
Chunqi Li

LNT is the major biologically active substance extracted from Lentinus edodes (L. edodes). Although functional and pharmacological studies have demonstrated that LNT has multiple benefits for animals and humans, the safety assessment is far from sufficient. To evaluate the potential safety risk, larval zebrafish were continuously exposed to varying concentrations of LNT for 120 h. The 96 h LC50 of LNT was determined to be 1228 μg/mL, and morphological defects including short body length, reduced eye and swim bladder sizes and yolk sac edema were observed. In addition, LNT exposure significantly reduced the blood flow velocity and locomotor activity of larval zebrafish. The biochemical parameters were also affected, showing reduced glucose, triglyceride and cholesterol levels in zebrafish larvae after being exposed to LNT. Correspondingly, the genes involved in glucose and lipid metabolism were disrupted. In conclusion, the present study demonstrates the adverse potential of high concentrations of LNT on the development of zebrafish larvae in the early life stage.


Author(s):  
Bruno Galvão de Campos ◽  
Mariana Bruni Marques do Prado e Silva ◽  
Francisco Avelelas ◽  
Frederico Maia ◽  
Susana Loureiro ◽  
...  

Aquaculture ◽  
2022 ◽  
pp. 737886
Author(s):  
İlhan Aydin ◽  
Rafet Çağrı Öztürk ◽  
Yahya Terzi ◽  
Ercan Küçük ◽  
Hamza Polat ◽  
...  

Author(s):  
Yu-Jin Shin ◽  
Bokyung Kim ◽  
Hokyun Kim ◽  
Kyungtae Kim ◽  
Kyunghwa Park ◽  
...  

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0260516
Author(s):  
Anna Koester ◽  
Amanda K. Ford ◽  
Sebastian C. A. Ferse ◽  
Valentina Migani ◽  
Nancy Bunbury ◽  
...  

Coral recruitment and successive growth are essential for post-disturbance reef recovery. As coral recruit and juvenile abundances vary across locations and under different environmental regimes, their assessment at remote, undisturbed reefs improves our understanding of early life stage dynamics of corals. Here, we first explored changes in coral juvenile abundance across three locations (lagoon, seaward west and east) at remote Aldabra Atoll (Seychelles) between 2015 and 2019, which spanned the 2015/16 global coral bleaching event. Secondly, we measured variation in coral recruit abundance on settlement tiles from two sites (lagoon, seaward reef) during August 2018–August 2019. Juvenile abundance decreased from 14.1 ± 1.2 to 7.4 ± 0.5 colonies m-2 (mean ± SE) during 2015–2016 and increased to 22.4 ± 1.2 colonies m-2 during 2016–2019. Whilst juvenile abundance increased two- to three-fold at the lagoonal and seaward western sites during 2016–2018 (from 7.7–8.3 to 17.3–24.7 colonies m-2), increases at the seaward eastern sites occurred later (2018–2019; from 5.8–6.9 to 16.6–24.1 colonies m-2). The composition of coral recruits on settlement tiles was dominated by Pocilloporidae (64–92% of all recruits), and recruit abundance was 7- to 47-fold higher inside than outside the lagoon. Recruit abundance was highest in October–December 2018 (2164 ± 453 recruits m-2) and lowest in June–August 2019 (240 ± 98 recruits m-2). As Acroporid recruit abundance corresponded to this trend, the results suggest that broadcast spawning occurred during October–December, when water temperature increased from 26 to 29°C. This study provides the first published record on coral recruit abundance in the Seychelles Outer Islands, indicates a rapid (2–3 years) increase of juvenile corals following a bleaching event, and provides crucial baseline data for future research on reef resilience and connectivity within the region.


2021 ◽  
Vol 227 ◽  
pp. 112883
Author(s):  
Wen-Jun Zhao ◽  
Xiang Li ◽  
Ze-Qiong Xu ◽  
Ke-Ming Fang ◽  
Hua-Chang Hong ◽  
...  

2021 ◽  
Author(s):  
Isaac Wirgin ◽  
R. Christopher Chambers

Abstract Sturgeon populations worldwide are threatened with extirpation but little is known about their tendency to bioaccumulate contaminants and their sensitivities to environmental burdens of these contaminants. Shortnose sturgeon and Atlantic sturgeon, two species that are federally endangered in the U.S., co-occur in the Hudson River (HR) where high sediment levels of PCBs and PCDD/Fs occur. Previous controlled laboratory studies showed that young life-stages of both species are sensitive to toxicities at low levels of TCDD and PCB126 exposure. The objective here was to measure congener-specific hepatic levels of PCBs and PCDD/Fs in HR specimens in order to determine if in situ bioaccumulation of these compounds was sufficiently high to cause the early life-stage toxicities previously observed. Estimates of hepatic burdens of PCBs and PCDD/Fs were obtained from a small number of specimens of each species collected between 2014 and 2016 and specimens of shortnose sturgeon collected over 30 yr earlier and archived in a museum collection. Several significant patterns emerged. Hepatic levels of legacy PCBs and PCDDs were low in specimens of both species, but typically higher in shortnose than Atlantic sturgeon, a pattern consistent with their habitat use in the HR. Hepatic burdens from archived specimens of shortnose sturgeon tended to be higher than more recently collected ones despite expected reduction in their burdens due to preservation methods. Several inadvertent PCBs congeners were detected, including PCB11, but their possible toxicity to natural populations remains to be determined in future experiments. Levels of select PCDFs congeners, 2,3,7,8-TCDF and 2,3,4,7,8 PeCDF, were elevated in some shortnose sturgeon individuals from the HR. Using Relative Potency (ReP) factors derived from white sturgeon, the observed levels of some hepatic PCDFs in HR shortnose sturgeon may have been sufficiently high to impair recruitment of young life-stages in this ecosystem.


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