NDLI: Energy content of shore crab Carcinus maenas from a temperate estuary in Portugal

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Energy content of shore crab Carcinus maenas from a temperate estuary in Portugal

Content Provider	Semantic Scholar
Author	Oliveira, Kelly De
Copyright Year	2016
Abstract	The crab, Carcinus maenas (Linnaeus, 1758), is one of the most studied brachyuran species because of invading a wide geographic area facilitated by its broad tolerance to different temperature and salinity, long larval phase which enables dispersal and the capacity to survive long periods of starvation. Energy density is used to measure an animal growth and food consumption; it is a result of genetic constitution, nutritional condition and life history, and it varie with species, seasons and environment. Living organisms need energy for growth, reproduction and maintenance. In this work a total of 2746 crabs from Mondego estuary were colected from April of 2015 to November of 2015 and analyzed for biometry: 480 females, 6 females baring eggs, 380 males, 1872 juveniles. From these, 376 adult crabs were analyzed for energy content, although only animals with a carapace width superior than 20mm were used for calories assessment. Carapace width (CW) ranged from 2.1762.20mm, with an average of 36.64mm for females, 36.60mm for males and 6.69mm for juveniles Dry weight (DW) varied between 0.000614.7500g (an average of 3.1924g for females, 3.3877g for males and 0.0440g for juveniles) and the wet weight (WW) between 0.0013-55.7100g (an average of 11.1295g for females, 11.8015g for males and 0.1203g for juveniles). On average Carcinus maenas at Mondego estuary presented a total energy content of 32.170kJ, with a maximum of 107.900kJ and a minimum of 2.216kJ. For females the average was 30.715kJ and 33.785kJ for males; yet those differences were not statistically significant. The present study revealed that there is a spatial and temporal change in energy content of C.maenas. Energy content does not depend on color or sex but energy content depends on the life cycle. Furthermore, the changes in energy along the estuary reinforce the importance of food availability and habitat structure for C. maenas. FCUP iii Energy content of shore crab Carcinus maenas from a temperate estuary in Portugal
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://sigarra.up.pt/icbas/pt/pub_geral.show_file?pi_gdoc_id=884918
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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