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Seasonal and sex differences in energy reserves of red snapper Lutjanus campechanus on natural and artificial reefs in the northwestern Gulf of Mexico

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Seasonal and sex differences in energy reserves of red snapper Lutjanus campechanus on natural and artificial reefs in the northwestern Gulf of Mexico

Content Provider	Springer Nature Link
Author	Schwartzkopf, Brittany D. Cowan, James H.
Copyright Year	2016
Abstract	To evaluate the energetic condition of red snapper inhabiting natural and artificial reefs in the Gulf of Mexico, the liver-somatic index (LSI) and muscle tissue caloric density (CD) were measured for fish collected between September 2011 and October 2013. Liver energy reserves were highest in spring and decreased during summer, with greater LSI values at natural reefs in spring. While female red snapper LSI was greater than males at the natural reefs, indicating a larger energetic investment for spawning, it did not differ between males and females at the artificial reefs. Females at natural reefs have the ability to invest more energy in reproduction than females at artificial reefs, which is reflected in larger female LSI values at the natural reefs. Caloric density was highest in winter and decreased through fall at the natural reefs, with the opposite trend observed at artificial reefs. Muscle energy reserves are likely utilized for gonad development, while stored liver energy is utilized during and after spawning. Female red snapper at natural reefs can exhibit greater energy reserves, and thus a higher energetic condition than females at artificial reefs. Recognizing that energetic condition differs between habitats could enhance future red snapper stock assessments.
Starting Page	13
Ending Page	22
Page Count	10
File Format	PDF
ISSN	09199268
Journal	Fisheries Science
Volume Number	83
Issue Number	1
e-ISSN	14442906
Language	English
Publisher	Springer Japan
Publisher Date	2016-10-24
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Condition Caloric density Habitat quality Liver-somatic index Lutjanus campechanus Temporal energy changes Fish & Wildlife Biology & Management Freshwater & Marine Ecology Food Science
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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