THE EFFECT OF BIOTIN ON THE METABOLISM OF LIVER SLICES FROM BIOTINDEFICIENT RATS     

Summerson WH  Lee JM  Partridge CW 《Science (New York, N.Y.)》1944,100(2594):250-251

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我爱夏日长     

Emma 《百姓》2009,(7):4-4

印象里的北京夏天，是“切一片西瓜四五两，真正的薄皮脆沙瓤”；是胡同树荫地下洒了水，端个马扎儿看旁边的人下棋；是冰镇的酸梅汤，过水的炸酱面……如今好像也不是这个样子了。自打有了空调，夏日的那种痛快，焦灼，蠢蠢欲动……好像都淡化减弱了许多，  相似文献   

Ambient salinity and osmoregulation,energy metabolism and growth in juvenile yellowtail kingfish (Seriola lalandi Valenciennes 1833) in a recirculating aquaculture system          下载免费PDF全文

Ainhoa Blanco Garcia  Gavin J Partridge  Gert Flik  Jonathan A C Roques  Wout Abbink 《Aquaculture Research》2015,46(11):2789-2797

The effects of salinity on plasma osmolality, branchial chloride cell density, feed consumption and conversion and growth performance of yellowtail kingfish (Seriola lalandi) were evaluated. Fish (11.6 ± 0.6 g) were kept for 29 days at 14, 18, 22, 26 (experimental) and 30 g L^?1 (control) salinity in independent, pilot‐scale recirculation aquaculture systems. No differences in plasma osmolality or chloride cell numbers in gills were observed, pointing to a strong osmoregulatory capacity in the juveniles. Fish at 14, 18 and 22 g L^?1 (7.61 ± 0.19, 7.61 ± 0.01 and 7.61 ± 0.13% day^?1, respectively) had higher growth rates than fish at 26 and 30 g L^?1 (7.10 ± 0.05 and 6.97 ± 0.06% day^?1 respectively). The higher growth rate at lower salinity resulted from increased feed intake; feed conversion was not different. An evaluation of the impact of salinity on growth rate of on‐growing stages (till market size) seems warranted to assess whether the profitable effects of low salinity persist in later stages of this important aquaculture species.  相似文献   

A review of the physical habitat requirements and research priorities needed to underpin conservation of the endangered freshwater pearl mussel Margaritifera margaritifera          下载免费PDF全文

Emma Quinlan  Chris Gibbins  Iain Malcolm  Ramon Batalla  Damia Vericat  Lee Hastie 《水产资源保护:海洋与淡水生态系统》2015,25(1):107-124

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Developmental profiles and expression of the DNA methyltransferase genes in the fathead minnow (<Emphasis Type="Italic">Pimephales promelas</Emphasis>) following exposure to di-2-ethylhexyl phthalate     

Richard?K.?Wood  Emma?Crowley  Christopher?J.?MartyniukEmail author 《Fish physiology and biochemistry》2016,42(1):7-18

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Shell shape and meat condition in selectively bred Sydney rock oysters,Saccostrea glomerata (Gould, 1850): The influence of grow‐out methods          下载免费PDF全文

Caleb Rankin  Natalie Moltschaniwskyj  Jason Morton  Emma Wilkie 《Aquaculture Research》2018,49(3):1189-1199

The Australian edible oyster industry has been severely impacted by disease and declining yields since the 1970s. Selective breeding of Saccostrea glomerata is one measure addressing these problems by producing fast‐growing, disease‐resistant oysters. Farmers report that selected oysters have different growth characteristics than their wild counterparts using conventional grow‐out methods. This study investigated how different grow‐out methods influence commercially valuable oyster characteristics including shell length, shape, surface growth deformities and meat condition. In June 2015, selectively bred S. glomerata spat were deployed in two estuaries (Hawkesbury River and Georges River) in NSW, Australia, using three grow‐out methods (fixed trays, Stanway cylinders and floating baskets). In November 2015, oysters were transferred among grow‐out methods to test for the effects of changing grow‐out methods on oyster growth patterns. Oysters transferred from baskets to cylinders and from trays to cylinders had, on average, deeper and wider shells, a higher meat condition and fewer shell surface deformities than oysters in other grow‐out method combinations. However, these oysters were smaller than oysters not grown in cylinders. While there were some differences in growth patterns between the estuaries, overall it was the grow‐out methods that most influenced oyster characteristics. This was attributed to differences in the amount and magnitude of movement oysters experienced in the grow‐out methods, as recorded by motion sensors. This study demonstrates how grow‐out methods can be managed to achieve desired growth trajectories and therefore improve marketability among selective bred S. glomerata.  相似文献   

The capacity of oysters to regulate energy metabolism‐related processes may be key to their resilience against ocean acidification          下载免费PDF全文

Priscila Goncalves  Kelli Anderson  David Andrew Raftos  Emma Louise Thompson 《Aquaculture Research》2018,49(5):2059-2071

Bivalve molluscs, such as oysters, are threatened by shifts in seawater chemistry resulting from climate change. However, a few species and populations within a species stand out for their capacity to cope with the impacts of climate change‐associated stressors. Understanding the intracellular basis of such differential responses can contribute to the development of strategies to minimise the pervasive effects of a changing ocean on marine organisms. In this study, we explored the intracellular responses to ocean acidification in two genetically distinct populations of Sydney rock oysters (Saccostrea glomerata). Selectively bred and wild type oysters exhibited markedly different mitochondrial integrities (mitochondrial membrane potential) and levels of reactive oxygen species (ROS) in their hemocytes under CO₂ stress. Analysis of these cellular parameters after 4 and 15 days of exposure to elevated CO₂ indicated that the onset of intracellular responses occurred earlier in the selectively bred oysters when compared to the wild type population. This may be due to an inherent capacity for increased intracellular energy production or adaptive energy reallocation in the selectively bred population. The differences observed in mitochondrial integrity and in ROS formation between oyster breeding lines reveal candidate biological processes that may underlie resilience or susceptibility to ocean acidification. Such processes can be targeted in breeding programs aiming to mitigate the impacts of climate change on threatened species.  相似文献   

Earlier activity of Drosophila suzukii in high woodland landscapes but relative abundance is unaffected     

Emma Pelton  Claudio Gratton  Rufus Isaacs  Steven Van Timmeren  Anna Blanton  Christelle Guédot 《Journal of pest science》2016,89(3):725-733

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Suitability of compensatory saltmarsh habitat for feeding and diet of multiple estuarine fish species     

Thomas Stamp  Elizabeth West  Steve Colclough  Shaun Plenty  Benjamin Ciotti  Tim Robbins  Emma Sheehan 《Fisheries Management and Ecology》2023,30(1):44-55

Saltmarsh provides essential fish feeding and nursery habitat but has globally declined by 50%. We used a statistical block design to compare fish feeding activity within human-engineered or “re-aligned” saltmarsh to established saltmarsh. Linear and multivariate modelling highlighted that Thinlip Mullet (Chelon ramada) and European Bass (Dicentrarchus labrax) feeding rates were 16% and 31% lower within re-aligned than established saltmarshes, whereas Gobies (Pomatoschistus spp.) fed at the same rate as in both habitats. Analysis of European bass and Goby gut contents highlighted that important detritivorous prey species were up to 85.6% lower in re-aligned sites. Lower vegetation density may have negatively affected the feeding ecologies of fishes within re-aligned sites. However, due to the ecological value and potential for further improvement or habitat development, continued assessment of the beneficial effects of re-aligned sites for fisheries and net gain perspectives is needed.  相似文献   

Population-level variation of Fraxinus americana (white ash) is influenced by precipitation differences across the native range     

Marchin RM  Sage EL  Ward JK 《Tree physiology》2008,28(1):151-159

We investigated the potential of Fraxinus americana L. to adapt to climate change by comparing diameter growth, survival and physiological status of 44 populations of 30-year-old trees originating from throughout the species range and grown in a common garden. Populations originating closest to the latitude of the common garden had the most rapid diameter growth and the highest survival. Among populations originating within a narrow latitudinal band along an east-west gradient of decreasing precipitation, those from the drier western end were best adapted to the dry climate of the common garden site, as judged by survival, stem circumference, leaf and wood carbon isotope ratios, leaf mass per area and leaf nitrogen concentration. These findings suggest that eastern populations may not perform well under the hotter and drier conditions predicted by climate change scenarios. Moreover, in the event of significant climate change, the short-term acclimation responses (within a generation) of F. americana may be insufficient to ensure the continued vigor or survival of this species throughout much of its present range.  相似文献