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Cannibalistic inter...
Cannibalistic interactions of juvenile mud crabs Scylla serrata: the effect of shelter and crab size
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Mirera, O. D. (författare)
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- Moksnes, Per-Olav, 1965 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för biologi och miljövetenskap,Department of Biological and Environmental Sciences
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(creator_code:org_t)
- 2013-12-19
- 2013
- Engelska.
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Ingår i: African Journal of Marine Science. - : National Inquiry Services Center (NISC). - 1814-232X .- 1814-2338. ; 35:4, s. 545-553
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.2...
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Abstract
Ämnesord
Stäng
- In the culture of mud crab Scylla serrata, cannibalism is often the greatest cause of mortality. A laboratory study was conducted to compare the influence of size class differences and shelter on cannibalism and limb loss in juvenile mud crabs (20-70 mm internal carapace width; ICW). Four size classes of juvenile crab (A: 21-30 mm, B: 31-40 mm, C: 41-50 mm and D: 51-70 mm ICW) were tested in all possible combinations using four different substrata with varying degree of shelter (seaweed, plastic strings, bamboo tubes and open sand substratum) in 48 h trials. Results suggest that cannibalistic interactions are heavily influenced both by size differences of crabs and the availability of shelter. Cannibalism on the smallest size class (20-30 mm ICW) increased about 10 times in the presence of the largest crab (51-70 mm ICW) compared with treatment with only same-size crabs (control treatment). Shelter provided little refuge for the smallest crabs, whereas cannibalism in larger size classes decreased by >50% in all the shelters compared with the sand substratum. The findings suggest that both size-grading and provision of shelter could minimise cannibalism in the culture of mud crabs.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Nyckelord
- cannibalism
- mortality
- size combination
- size grading
- substrata
- CARCINUS-MAENAS
- HABITAT SELECTION
- YOUNG JUVENILES
- CANCER-MAGISTER
- BLUE-CRAB
- POSTLARVAE
- PREDATION
- BEHAVIOR
- DENSITY
- CULTURE
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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