Health and nutrition of loggerhead sea turtles (Caretta caretta) in the southeastern United States.
dietary supplement
hematology
nutrition
plasma biochemistry
prey items
rehabilitation
Journal
Journal of animal physiology and animal nutrition
ISSN: 1439-0396
Titre abrégé: J Anim Physiol Anim Nutr (Berl)
Pays: Germany
ID NLM: 101126979
Informations de publication
Date de publication:
Jan 2022
Jan 2022
Historique:
revised:
13
04
2021
received:
27
02
2021
accepted:
26
04
2021
pubmed:
14
6
2021
medline:
14
1
2022
entrez:
13
6
2021
Statut:
ppublish
Résumé
Loggerhead sea turtles (Caretta caretta) are opportunistic carnivores that feed primarily on benthic invertebrates and fish. Sea turtle rehabilitation requires provision of a species-specific, balanced diet that supplies nutrition similar to that of a wild diet; this can be challenging because free-ranging loggerheads' diets vary depending on their life stage and geographic location, with predominant prey species dictated by local availability. The goal of this study was to better understand the nutritional needs of subadult and adult loggerheads in rehabilitation. This was accomplished by conducting a retrospective survey of stomach contents identified during gross necropsy of 153 deceased loggerheads that stranded in coastal Georgia, USA. A total of 288 different forage items were identified; the most frequently observed prey items belong to the subphylum Crustacea (N = 131), followed by bony fish (Osteichthyes; N = 45), gastropod mollusks (N = 40), bivalve mollusks (N = 23), and Atlantic horseshoe crabs (Limulus polyphemus; N = 15). The proportions of certain prey items differed significantly with turtle size; adult turtles ate proportionately more gastropods (p = 0.001), and subadults ate proportionately more fish (p = 0.01). Stomach contents information was used to determine common local prey items (blue crab, cannonball jellyfish, horseshoe crab, whelk), which were evaluated for nutritional content. Additionally, we compared hematology and plasma biochemistry profiles (including proteins, trace minerals, and vitamins) between four cohorts of loggerhead turtles, including free-ranging subadults and adults, nesting females, and loggerheads undergoing rehabilitation. This information was applied to inform a regionally specific, formulated diet for tube feeding, and a supplement containing vitamins and minerals for captive loggerheads, to more closely approximate the nutritional content of their natural diet. Assessing the regional and temporal variability in loggerhead diets is an important component in their effective conservation because resultant data can be used to help understand the impacts of environmental perturbations on benthic food webs.
Substances chimiques
Trace Elements
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
205-219Subventions
Organisme : Mazuri Exotic Animal Nutrition
Organisme : Georgia Aquarium
Organisme : Riverbanks Zoo and Botanical Gardens
Organisme : Henry Vilas Zoological Society
Organisme : National Marine Fisheries Service
ID : NA03NMF4720281
Organisme : National Marine Fisheries Service
ID : NA08NMF4720502
Informations de copyright
© 2021 Wiley-VCH GmbH.
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