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Physiological changes in post-hatchling green turtles
Relocation of sea turtle nests and the retention of post-hatchlings for head-starting programs are both commonly used to improve conservation outcomes and facilitate eco-tourism ventures. Currently, there is little literature surrounding the husbandry protocols required during these programs to opti...
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Published in: | Conservation physiology 2019-01, Vol.7 (1), p.1 |
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creator | March, Duane T Ariel, Ellen Munns, Suzy Rudd, Donna Blyde, David Christidis, Les Kelaher, Brendan P |
description | Relocation of sea turtle nests and the retention of post-hatchlings for head-starting programs are both commonly used to improve conservation outcomes and facilitate eco-tourism ventures. Currently, there is little literature surrounding the husbandry protocols required during these programs to optimize post-release outcomes. To assess the impact of varied feeding regimes on exercise performance, (which will hereafter be referred to as 'fitness'), 40 10-month-old captive post-hatchling green turtles (Chelonia mydas) were divided into four groups of 10 and fasted for either 3, 9, 10 or 15 h. The animals were then subjected to a fitness test via repetitive use of the 'righting reflex' on land. Health assessments were conducted prior to the fitness test, including; heart rate, haematocrit (Hct), heterophil to lymphocyte ratio and the measurement of 11 biochemical analytes, including pH, partial pressures of carbon dioxide ([P.sub.v]C[O.sub.2]) and oxygen ([P.sub.v][O.sub.2]), lactate, bicarbonate (HC[O.sup.-.sub.3]), sodium ([Na.sup.+]), potassium ([K.sup.+]), chloride ([Cl.sup.-]), ionized calcium (i[Ca.sup.2+]), glucose and urea. Results were corrected for multiple comparisons and significant differences among groups were demonstrated for temperature, pH, HC[O.sup.-.sub.3],i[Ca.sup.2+], urea and lactate. To investigate physiological relationships between analytes, correlation coefficients were calculated between fitness and glucose, fitness and lactate, glucose and lactate, pH and i[Ca.sup.2+], pH and [K.sup.+], pH and [P.sub.v]C[O.sub.2], pH and HC[O.sup.-.sub.3] and Hct and [K.sup.+]. Following correction for multiple comparisons, significant relationships were seen between pH and i[Ca.sup.2+] and pH and HC[O.sup.-.sub.3]. Post-hatchling turtles appear to enter a catabolic state when exposed to short-term fasting. While this did not have a direct impact on fitness, the production of an intense energetic output from a catabolic state may induce a physiological debt. This study suggests that handling that induces a physical response should be minimized and animals should be fed within 10 h of release. |
doi_str_mv | 10.1093/conphys/coz016 |
format | article |
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Currently, there is little literature surrounding the husbandry protocols required during these programs to optimize post-release outcomes. To assess the impact of varied feeding regimes on exercise performance, (which will hereafter be referred to as 'fitness'), 40 10-month-old captive post-hatchling green turtles (Chelonia mydas) were divided into four groups of 10 and fasted for either 3, 9, 10 or 15 h. The animals were then subjected to a fitness test via repetitive use of the 'righting reflex' on land. Health assessments were conducted prior to the fitness test, including; heart rate, haematocrit (Hct), heterophil to lymphocyte ratio and the measurement of 11 biochemical analytes, including pH, partial pressures of carbon dioxide ([P.sub.v]C[O.sub.2]) and oxygen ([P.sub.v][O.sub.2]), lactate, bicarbonate (HC[O.sup.-.sub.3]), sodium ([Na.sup.+]), potassium ([K.sup.+]), chloride ([Cl.sup.-]), ionized calcium (i[Ca.sup.2+]), glucose and urea. Results were corrected for multiple comparisons and significant differences among groups were demonstrated for temperature, pH, HC[O.sup.-.sub.3],i[Ca.sup.2+], urea and lactate. To investigate physiological relationships between analytes, correlation coefficients were calculated between fitness and glucose, fitness and lactate, glucose and lactate, pH and i[Ca.sup.2+], pH and [K.sup.+], pH and [P.sub.v]C[O.sub.2], pH and HC[O.sup.-.sub.3] and Hct and [K.sup.+]. Following correction for multiple comparisons, significant relationships were seen between pH and i[Ca.sup.2+] and pH and HC[O.sup.-.sub.3]. Post-hatchling turtles appear to enter a catabolic state when exposed to short-term fasting. While this did not have a direct impact on fitness, the production of an intense energetic output from a catabolic state may induce a physiological debt. This study suggests that handling that induces a physical response should be minimized and animals should be fed within 10 h of release.</description><identifier>ISSN: 2051-1434</identifier><identifier>EISSN: 2051-1434</identifier><identifier>DOI: 10.1093/conphys/coz016</identifier><language>eng</language><publisher>Oxford University Press</publisher><subject>Captive breeding ; Carbonates ; Ecotourism ; Fasting ; Fishes ; Food and nutrition ; Glucose ; Green turtle ; Heart rate ; Lactates ; Lymphocytes ; Medical tests ; Physiological aspects ; Protection and preservation ; Reptiles ; Sea turtles ; Tourism ; Turtles ; Urea</subject><ispartof>Conservation physiology, 2019-01, Vol.7 (1), p.1</ispartof><rights>COPYRIGHT 2019 Oxford University Press</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids></links><search><creatorcontrib>March, Duane T</creatorcontrib><creatorcontrib>Ariel, Ellen</creatorcontrib><creatorcontrib>Munns, Suzy</creatorcontrib><creatorcontrib>Rudd, Donna</creatorcontrib><creatorcontrib>Blyde, David</creatorcontrib><creatorcontrib>Christidis, Les</creatorcontrib><creatorcontrib>Kelaher, Brendan P</creatorcontrib><title>Physiological changes in post-hatchling green turtles</title><title>Conservation physiology</title><description>Relocation of sea turtle nests and the retention of post-hatchlings for head-starting programs are both commonly used to improve conservation outcomes and facilitate eco-tourism ventures. Currently, there is little literature surrounding the husbandry protocols required during these programs to optimize post-release outcomes. To assess the impact of varied feeding regimes on exercise performance, (which will hereafter be referred to as 'fitness'), 40 10-month-old captive post-hatchling green turtles (Chelonia mydas) were divided into four groups of 10 and fasted for either 3, 9, 10 or 15 h. The animals were then subjected to a fitness test via repetitive use of the 'righting reflex' on land. Health assessments were conducted prior to the fitness test, including; heart rate, haematocrit (Hct), heterophil to lymphocyte ratio and the measurement of 11 biochemical analytes, including pH, partial pressures of carbon dioxide ([P.sub.v]C[O.sub.2]) and oxygen ([P.sub.v][O.sub.2]), lactate, bicarbonate (HC[O.sup.-.sub.3]), sodium ([Na.sup.+]), potassium ([K.sup.+]), chloride ([Cl.sup.-]), ionized calcium (i[Ca.sup.2+]), glucose and urea. Results were corrected for multiple comparisons and significant differences among groups were demonstrated for temperature, pH, HC[O.sup.-.sub.3],i[Ca.sup.2+], urea and lactate. To investigate physiological relationships between analytes, correlation coefficients were calculated between fitness and glucose, fitness and lactate, glucose and lactate, pH and i[Ca.sup.2+], pH and [K.sup.+], pH and [P.sub.v]C[O.sub.2], pH and HC[O.sup.-.sub.3] and Hct and [K.sup.+]. Following correction for multiple comparisons, significant relationships were seen between pH and i[Ca.sup.2+] and pH and HC[O.sup.-.sub.3]. Post-hatchling turtles appear to enter a catabolic state when exposed to short-term fasting. While this did not have a direct impact on fitness, the production of an intense energetic output from a catabolic state may induce a physiological debt. This study suggests that handling that induces a physical response should be minimized and animals should be fed within 10 h of release.</description><subject>Captive breeding</subject><subject>Carbonates</subject><subject>Ecotourism</subject><subject>Fasting</subject><subject>Fishes</subject><subject>Food and nutrition</subject><subject>Glucose</subject><subject>Green turtle</subject><subject>Heart rate</subject><subject>Lactates</subject><subject>Lymphocytes</subject><subject>Medical tests</subject><subject>Physiological aspects</subject><subject>Protection and preservation</subject><subject>Reptiles</subject><subject>Sea turtles</subject><subject>Tourism</subject><subject>Turtles</subject><subject>Urea</subject><issn>2051-1434</issn><issn>2051-1434</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqVjj0LwjAURYMoWLSrc1aH6ks_7Sii6CbqXkKISSQkpS8F9dfbwcHV6dzhXDiELBisGNTZWnjX6hcOfAMrRyRKoWAJy7N8_LOnJEZ8AACDqijqTUSK8_Ay3nplBLdUaO6URGocbT2GRPMgtDVOUdVJ6Wjou2Alzsnkzi3K-MsZWR72t90xUdzKxrihJshnULxHbE7XS7MtWQ5pDVWe_eN-AGC0Qgc</recordid><startdate>20190101</startdate><enddate>20190101</enddate><creator>March, Duane T</creator><creator>Ariel, Ellen</creator><creator>Munns, Suzy</creator><creator>Rudd, Donna</creator><creator>Blyde, David</creator><creator>Christidis, Les</creator><creator>Kelaher, Brendan P</creator><general>Oxford University Press</general><scope>ISR</scope></search><sort><creationdate>20190101</creationdate><title>Physiological changes in post-hatchling green turtles</title><author>March, Duane T ; Ariel, Ellen ; Munns, Suzy ; Rudd, Donna ; Blyde, David ; Christidis, Les ; Kelaher, Brendan P</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-gale_incontextgauss_ISR_A6140290743</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Captive breeding</topic><topic>Carbonates</topic><topic>Ecotourism</topic><topic>Fasting</topic><topic>Fishes</topic><topic>Food and nutrition</topic><topic>Glucose</topic><topic>Green turtle</topic><topic>Heart rate</topic><topic>Lactates</topic><topic>Lymphocytes</topic><topic>Medical tests</topic><topic>Physiological aspects</topic><topic>Protection and preservation</topic><topic>Reptiles</topic><topic>Sea turtles</topic><topic>Tourism</topic><topic>Turtles</topic><topic>Urea</topic><toplevel>online_resources</toplevel><creatorcontrib>March, Duane T</creatorcontrib><creatorcontrib>Ariel, Ellen</creatorcontrib><creatorcontrib>Munns, Suzy</creatorcontrib><creatorcontrib>Rudd, Donna</creatorcontrib><creatorcontrib>Blyde, David</creatorcontrib><creatorcontrib>Christidis, Les</creatorcontrib><creatorcontrib>Kelaher, Brendan P</creatorcontrib><collection>Gale In Context: Science</collection><jtitle>Conservation physiology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>March, Duane T</au><au>Ariel, Ellen</au><au>Munns, Suzy</au><au>Rudd, Donna</au><au>Blyde, David</au><au>Christidis, Les</au><au>Kelaher, Brendan P</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Physiological changes in post-hatchling green turtles</atitle><jtitle>Conservation physiology</jtitle><date>2019-01-01</date><risdate>2019</risdate><volume>7</volume><issue>1</issue><spage>1</spage><pages>1-</pages><issn>2051-1434</issn><eissn>2051-1434</eissn><abstract>Relocation of sea turtle nests and the retention of post-hatchlings for head-starting programs are both commonly used to improve conservation outcomes and facilitate eco-tourism ventures. Currently, there is little literature surrounding the husbandry protocols required during these programs to optimize post-release outcomes. To assess the impact of varied feeding regimes on exercise performance, (which will hereafter be referred to as 'fitness'), 40 10-month-old captive post-hatchling green turtles (Chelonia mydas) were divided into four groups of 10 and fasted for either 3, 9, 10 or 15 h. The animals were then subjected to a fitness test via repetitive use of the 'righting reflex' on land. Health assessments were conducted prior to the fitness test, including; heart rate, haematocrit (Hct), heterophil to lymphocyte ratio and the measurement of 11 biochemical analytes, including pH, partial pressures of carbon dioxide ([P.sub.v]C[O.sub.2]) and oxygen ([P.sub.v][O.sub.2]), lactate, bicarbonate (HC[O.sup.-.sub.3]), sodium ([Na.sup.+]), potassium ([K.sup.+]), chloride ([Cl.sup.-]), ionized calcium (i[Ca.sup.2+]), glucose and urea. Results were corrected for multiple comparisons and significant differences among groups were demonstrated for temperature, pH, HC[O.sup.-.sub.3],i[Ca.sup.2+], urea and lactate. To investigate physiological relationships between analytes, correlation coefficients were calculated between fitness and glucose, fitness and lactate, glucose and lactate, pH and i[Ca.sup.2+], pH and [K.sup.+], pH and [P.sub.v]C[O.sub.2], pH and HC[O.sup.-.sub.3] and Hct and [K.sup.+]. Following correction for multiple comparisons, significant relationships were seen between pH and i[Ca.sup.2+] and pH and HC[O.sup.-.sub.3]. Post-hatchling turtles appear to enter a catabolic state when exposed to short-term fasting. While this did not have a direct impact on fitness, the production of an intense energetic output from a catabolic state may induce a physiological debt. This study suggests that handling that induces a physical response should be minimized and animals should be fed within 10 h of release.</abstract><pub>Oxford University Press</pub><doi>10.1093/conphys/coz016</doi><tpages>9</tpages></addata></record> |
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source | Oxford Journals Online; PubMed Central |
subjects | Captive breeding Carbonates Ecotourism Fasting Fishes Food and nutrition Glucose Green turtle Heart rate Lactates Lymphocytes Medical tests Physiological aspects Protection and preservation Reptiles Sea turtles Tourism Turtles Urea |
title | Physiological changes in post-hatchling green turtles |
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