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Conservation Physiology

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https://www.readbyqxmd.com/read/28630711/matchmaker-com-for-pandas
#1
Bridie J M Allan
No abstract text is available yet for this article.
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28616239/reflex-impairment-and-physiology-as-predictors-of-delayed-mortality-in-recreationally-caught-yellowtail-snapper-ocyurus-chrysurus
#2
Francesca C Forrestal, M Danielle McDonald, Georgianna Burress, David J Die
Yellowtail snapper (Ocyurus chrysurus) is an important part of the reef fish assemblage in the western, tropical Atlantic and is caught by both recreational and commercial fisheries in south Florida and the Bahamas. It is estimated that 80% of snapper caught within southeastern Florida waters are discarded due to minimum size restrictions. Neglecting to include information on delayed mortality of undersized fish has the potential for fishery managers to overestimate the abundance of smaller size classes and introduce bias into stock assessments...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28616238/validation-of-a-portable-waterproof-blood-ph-analyser-for-elasmobranchs
#3
Brendan Talwar, Ian A Bouyoucos, Oliver Shipley, Jodie L Rummer, John W Mandelman, Edward J Brooks, R Dean Grubbs
Quantifying changes in blood chemistry in elasmobranchs can provide insights into the physiological insults caused by anthropogenic stress, and can ultimately inform conservation and management strategies. Current methods for analysing elasmobranch blood chemistry in the field are often costly and logistically challenging. We compared blood pH values measured using a portable, waterproof pH meter (Hanna Instruments HI 99161) with blood pH values measured by an i-STAT system (CG4+ cartridges), which was previously validated for teleost and elasmobranch fishes, to gauge the accuracy of the pH meter in determining whole blood pH for the Cuban dogfish (Squalus cubensis) and lemon shark (Negaprion brevirostris)...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28580147/the-quantification-of-reproductive-hormones-in-the-hair-of-captive-adult-brown-bears-and-their-application-as-indicators-of-sex-and-reproductive-state
#4
Marc Cattet, Gordon B Stenhouse, David M Janz, Luciene Kapronczai, Joy Anne Erlenbach, Heiko T Jansen, O Lynne Nelson, Charles T Robbins, John Boulanger
Recognizing the potential value of steroid hormone measurements to augment non-invasive genetic sampling, we developed procedures based on enzyme-linked immunoassays to quantify reproductive steroid hormone concentrations in brown bear (Ursus arctos) hair. Then, using 94 hair samples collected from eight captive adult bears over a 2-year period, we evaluated (i) associations between hair concentrations of testosterone, progesterone, estradiol and cortisol; (ii) the effect of collecting by shaving vs. plucking; and (iii) the utility of reproductive hormone profiles to differentiate sex and reproductive state...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28580146/use-of-physiological-knowledge-to-control-the-invasive-sea-lamprey-petromyzon-marinus-in-the-laurentian-great-lakes
#5
Michael J Siefkes
Sea lamprey (Petromyzon marinus) control in the Laurentian Great Lakes of North America is an example of using physiological knowledge to successfully control an invasive species and rehabilitate an ecosystem and valuable fishery. The parasitic sea lamprey contributed to the devastating collapse of native fish communities after invading the Great Lakes during the 1800s and early 1900s. Economic tragedy ensued with the loss of the fishery and severe impacts to property values and tourism resulting from sea lamprey-induced ecological changes...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28567285/substrate-roughening-improves-swimming-performance-in-two-small-bodied-riverine-fishes-implications-for-culvert-remediation-and-design
#6
Essie M Rodgers, Breeana M Heaslip, Rebecca L Cramp, Marcus Riches, Matthew A Gordos, Craig E Franklin
Worldwide declines in riverine fish abundance and diversity have been linked to the fragmentation of aquatic habitats through the installation of instream structures (e.g. culverts, dams, weirs and barrages). Restoring riverine connectivity can be achieved by remediating structures impeding fish movements by, for example, replacing smooth substrates of pipe culverts with naturalistic substrates (i.e. river stones; culvert roughening). However, empirical evaluations of the efficacy of such remediation efforts are often lacking despite the high economic cost...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28496982/blood-gases-biochemistry-and-haematology-of-gal%C3%A3-pagos-hawksbill-turtles-eretmochelys-imbricata
#7
Juan Pablo Muñoz-Pérez, Gregory A Lewbart, Maximilian Hirschfeld, Daniela Alarcón-Ruales, Judith Denkinger, Jason Guillermo Castañeda, Juan García, Kenneth J Lohmann
The hawksbill turtle, Eretmochelys imbricata, is a marine chelonian with a circum-global distribution, but the species is critically endangered and has nearly vanished from the eastern Pacific. Although reference blood parameter intervals have been published for many chelonian species and populations, including nesting Atlantic hawksbills, no such baseline biochemical and blood gas values have been reported for wild Pacific hawksbill turtles. Blood samples were drawn from eight hawksbill turtles captured in near shore foraging locations within the Galápagos archipelago over a period of four sequential years; three of these turtles were recaptured and sampled on multiple occasions...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28491321/thermotolerance-capacities-of-native-and-exotic-coastal-plants-will-lead-to-changes-in-species-composition-under-increased-heat-waves
#8
Kris French, Sharon A Robinson, Jodie Lia
With an increase in the frequency and intensity of extreme heat events, plants are likely to reach their thermal limits and show slower growth or increased mortality. We investigated differences amongst coastal native and invasive shrubs and grasses to investigate if particular species might be more at risk in the future. Using an ecologically relevant experimental set of heat waves over a month, we assessed changes in biomass and photosynthetic efficiency in a laboratory setting using 25 coastal Australian species divided into native and exotic shrubs, and native and exotic grasses...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28480038/comparative-swimming-and-station-holding-ability-of-the-threatened-rocky-mountain-sculpin-cottus-sp-from-four-hydrologically-distinct-rivers
#9
Marie F Veillard, Jonathan L W Ruppert, Keith Tierney, Douglas A Watkinson, Mark Poesch
Hydrologic alterations, such as dams, culverts or diversions, can introduce new selection pressures on freshwater fishes, where they are required to adapt to novel environmental conditions. Our study investigated how species adapt to natural and altered stream flow, where we use the threatened Rocky Mountain Sculpin (Cottus sp.) as a model organism. We compared the swimming and station-holding performance of Rocky Mountain Sculpin from four different hydrologic regimes in Alberta and British Columbia, including the North Milk River, a system that experiences increased flows from a large-scale diversion...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28480037/effect-of-short-term-regulated-temperature-variations-on-the-swimming-economy-of-atlantic-salmon-smolts
#10
C M Alexandre, A P Palstra
Migratory species travelling long distances between habitats to spawn or feed are well adapted to optimize their swimming economy. However, human activities, such as river regulation, represent potential threats to fish migration by changing environmental parameters that will have impact on their metabolism. The main objective of this study was to evaluate the changes in the swimming energetics of a salmonid species, Atlantic salmon (Salmo salar L.), caused by short-term temperature variations that usually result from the operation of hydroelectrical dams...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28469916/chill-out-physiological-responses-to-winter-ice-angling-in-two-temperate-freshwater-fishes
#11
Michael J Louison, Caleb T Hasler, Graham D Raby, Cory D Suski, Jeffrey A Stein
A large body of research has documented the stress response of fish following angling capture. Nearly all of these studies have taken place during the open-water season, with almost no work focused on the effects of capture in the winter via ice angling. We therefore conducted a study to examine physiological disturbance and reflex impairment following capture by ice-angling in two commonly targeted species, bluegill Lepomis macrochirus and yellow perch Perca flavescens. Fish were captured from a lake in eastern Wisconsin (USA) and sampled either immediately or after being held in tanks for 0...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28458885/bee-healthy-honeybee-physiology-reflects-landscape-and-supports-conservation
#12
Björn Illing
No abstract text is available yet for this article.
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28458884/urinary-profiles-of-progestin-and-androgen-metabolites-in-female-polar-bears-during-parturient-and-non-parturient-cycles
#13
Katrina K Knott, Gabriela F Mastromonaco, Megan A Owen, Andrew J Kouba
Due to the environmental and anthropogenic impacts that continue to threaten the reproductive success of polar bears, a more detailed understanding of their reproductive cycle is needed. Captive populations of polar bears provide an excellent opportunity to learn more about the reproductive physiology of the species. Progestin (P4) and androgen (T) metabolites in urine, and their ratio (P4:T), were examined during 11 reproductive cycles of captive female polar bears (n = 4) to characterize the steroid hormone profile during pregnancy and determine possible variations related to reproductive failure...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28421138/habitat-disturbance-results-in-chronic-stress-and-impaired-health-status-in-forest-dwelling-paleotropical-bats
#14
Anne Seltmann, Gábor Á Czirják, Alexandre Courtiol, Henry Bernard, Matthew J Struebig, Christian C Voigt
Anthropogenic habitat disturbance is a major threat to biodiversity worldwide. Yet, before population declines are detectable, individuals may suffer from chronic stress and impaired immunity in disturbed habitats, making them more susceptible to pathogens and adverse weather conditions. Here, we tested in a paleotropical forest with ongoing logging and fragmentation, whether habitat disturbance influences the body mass and immunity of bats. We measured and compared body mass, chronic stress (indicated by neutrophil to lymphocyte ratios) and the number of circulating immune cells between several bat species with different roost types living in recovering areas, actively logged forests, and fragmented forests in Sabah, Malaysia...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28421137/the-effect-of-temperature-on-development-and-behaviour-of-relict-leopard-frog-tadpoles
#15
Jeffrey A Goldstein, Karin von Seckendorr Hoff, Stanley D Hillyard
Relict leopard frog (Rana [Lithobates] onca) tadpoles were obtained shortly after hatching at Gosner stage 25 and raised in aquaria maintained at 15, 20, 25, 30 and 35°C. Development was arrested in the 15°C group, and survivorship declined to 64% after 191 days. However, 80% of the surviving larvae remained alive after the temperature was increased to 25°C. Of these, 96% reached metamorphosis. Survivorship of the 20, 25 and 30°C acclimation groups was 82, 94 and 66%, respectively, whereas none survived at 35°C...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28413684/physiological-effects-of-environmentally-relevant-multi-day-thermal-stress-on-wild-juvenile-atlantic-salmon-salmo-salar
#16
Emily Corey, Tommi Linnansaari, Richard A Cunjak, Suzanne Currie
The frequency of extreme thermal events in temperate freshwater systems is expected to increase alongside global surface temperature. The Miramichi River, located in eastern Canada, is a prominent Atlantic salmon (Salmo salar) river where water temperatures can exceed the proposed upper thermal limit for the species (~27°C). Current legislation closes the river to recreational angling when water temperatures exceed 20°C for two consecutive nights. We aimed to examine how natural thermal variation, representative of extreme high thermal events, affected the thermal tolerance and physiology of wild, juvenile Atlantic salmon...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28413683/obtaining-accurate-glucose-measurements-from-wild-animals-under-field-conditions-comparing-a-hand-held-glucometer-with-a-standard-laboratory-technique-in-grey-seals
#17
Kimberley A Bennett, Lucy M Turner, Sebastian Millward, Simon E W Moss, Ailsa J Hall
Glucose is an important metabolic fuel and circulating levels are tightly regulated in most mammals, but can drop when body fuel reserves become critically low. Glucose is mobilized rapidly from liver and muscle during stress in response to increased circulating cortisol. Blood glucose levels can thus be of value in conservation as an indicator of nutritional status and may be a useful, rapid assessment marker for acute or chronic stress. However, seals show unusual glucose regulation: circulating levels are high and insulin sensitivity is limited...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28361001/effects-of-ambient-oxygen-and-size-selective-mortality-on-growth-and-maturation-in-guppies
#18
Beatriz Diaz Pauli, Jeppe Kolding, Geetha Jeyakanth, Mikko Heino
Growth, onset of maturity and investment in reproduction are key traits for understanding variation in life-history strategies. Many environmental factors affect variation in these traits, but for fish, hypoxia and size-dependent mortality have become increasingly important because of human activities, such as increased nutrient enrichment (eutrophication), climate warming and selective fishing. Here, we study experimentally the effect of oxygen availability on maturation and growth in guppies (Poecilia reticulata) from two different selected lines, one subjected to positive and the other negative size-dependent fishing...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28361000/rethinking-the-approach-to-viability-monitoring-in-seed-genebanks
#19
Fiona R Hay, Katherine J Whitehouse
Seed viability monitoring, usually through a germination test, is a key aspect of genebank management; a low viability result triggers the regeneration of an accession in order to ensure that the genetic diversity of the accession is conserved and available for distribution. However, regular viability monitoring of large collections is costly in terms of seeds, labour and other resources. Genebanks differ in how they conduct their viability monitoring and how they collect, manage and store the data that are generated...
2017: Conservation Physiology
https://www.readbyqxmd.com/read/28360999/stress-response-to-handling-is-short-lived-but-may-reflect-personalities-in-a-wild-critically-endangered-tortoise-species
#20
Andrea F T Currylow, Edward E Louis, Daniel E Crocker
We investigated the acute stress response associated with animal personalities by measuring plasma glucocorticoids throughout handling and collected ~2 years of movement and behavioural data in a wild, Critically Endangered animal, Astrochelys radiata (radiated tortoise). To determine whether our standard, brief conscientious handling procedures induce a stress response in our target species, we applied a stressor by way of initial animal processing and deployment of telemetry equipment. During surveys and processing, we sampled animals immediately upon detection, again after completing transmitter attachment and processing, and a final time the following day...
2017: Conservation Physiology
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