TY - JOUR
T1 - Nutritional physiology of mahi-mahi (Coryphaena hippurus)
T2 - Postprandial metabolic response to different diets and metabolic impacts on swim performance
AU - Stieglitz, John D.
AU - Benetti, Daniel D.
AU - Grosell, Martin
N1 - Funding Information:
We would like to thank the students, staff, and volunteers of the University of Miami Aquaculture Program who assisted in maintaining the captive populations of mahi-mahi used in this study. Additionally, we would like to thank Dr. Kevin Schauer for his assistance with statistical analyses in R used in this study. This research was made possible by a grant from the Gulf of Mexico Research Initiative. Data are publicly available through the Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC) at https://data.gulfresearchinitiative.org . Grant No; SA-1520; Name: Relationship of Effects of Cardiac Outcomes in fish for Validation of Ecological Risk (RECOVER). GRIIDC doi: https://doi.org/10.7266/N7VT1QH7 . M.G. is a Maytag professor of ichthyology. All procedures and animals used in this study were done so in accordance with the University of Miami Institutional Animal Care and Use Committee (IACUC) protocol numbers 15-019 and 12-064.
PY - 2018/1
Y1 - 2018/1
N2 - Migratory pelagic fish species, such as the mahi-mahi (Coryphaena hippurus), must balance numerous metabolic demands simultaneously in order to survive in a challenging oceanic environment. Energetic support for such demands comes from a variety of natural prey items in the wild and can come from manufactured pelletized feed in captivity. This study quantified postprandial metabolism, commonly referred to as specific dynamic action (SDA), over time in adult mahi-mahi (706 ± 25 g; 38 ± 0.7 cm FL) in response to satiation feeding using three different natural and manufactured diets. Results indicate that during satiation feeding the amount of food ingested is dictated by energy content rather than prey mass, regardless of moisture content of the diet. Ingested meal energy did not differ significantly across groups (473 ± 45 kJ), nor did the duration of SDA (36 ± 2.1 h). Satiation feeding levels ranged from 2.9–16.2% bodyweight depending on the diet. Peak SDA and SDA magnitude were both significantly decreased in response to dry pelletized diet compared to the natural forage diets, despite equivalent energy consumption. Swim performance and maximum metabolic rate were not impacted significantly in satiation fed fish compared to unfed fish, supporting the evidence that mahi-mahi are able to maintain multiple metabolic demands at one time without compromising performance.
AB - Migratory pelagic fish species, such as the mahi-mahi (Coryphaena hippurus), must balance numerous metabolic demands simultaneously in order to survive in a challenging oceanic environment. Energetic support for such demands comes from a variety of natural prey items in the wild and can come from manufactured pelletized feed in captivity. This study quantified postprandial metabolism, commonly referred to as specific dynamic action (SDA), over time in adult mahi-mahi (706 ± 25 g; 38 ± 0.7 cm FL) in response to satiation feeding using three different natural and manufactured diets. Results indicate that during satiation feeding the amount of food ingested is dictated by energy content rather than prey mass, regardless of moisture content of the diet. Ingested meal energy did not differ significantly across groups (473 ± 45 kJ), nor did the duration of SDA (36 ± 2.1 h). Satiation feeding levels ranged from 2.9–16.2% bodyweight depending on the diet. Peak SDA and SDA magnitude were both significantly decreased in response to dry pelletized diet compared to the natural forage diets, despite equivalent energy consumption. Swim performance and maximum metabolic rate were not impacted significantly in satiation fed fish compared to unfed fish, supporting the evidence that mahi-mahi are able to maintain multiple metabolic demands at one time without compromising performance.
KW - Aquaculture
KW - Nutrition
KW - Pelagic
KW - Respirometry
KW - Specific dynamic action
KW - Swim performance
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U2 - 10.1016/j.cbpa.2017.10.016
DO - 10.1016/j.cbpa.2017.10.016
M3 - Article
C2 - 29054806
AN - SCOPUS:85032856620
VL - 215
SP - 28
EP - 34
JO - Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology
JF - Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology
SN - 1095-6433
ER -