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Efficiency of using emerald crabs Mithraculus sculptus to control bubble alga Ventricaria ventricosa (syn. Valonia ventricosa) in aquaria habitats

  • Joana Figueiredo (a1) (a2), Luís Narciso (a1), Ralph Turingan (a1) and Junda Lin (a2)

Ornamental crabs of the genus Mithraculus (Decapoda: Brachyura: Majidae) are utilized in reef aquaria to control nuisance algae, particularly bubble algae. Although Mithraculus have modified, spooned-shaped chelae to feed on both fleshy and filamentous algae, they may consume alternative foods offered in a reef aquarium. The objective of this study was to determine the efficiency of using Mithraculus sculptus to control the bubble alga Ventricaria ventricosa (Siphonocladales–Cladophorales complex, Chlorophyta) in the presence of alternative foods (commercial pellets and frozen mysids) commonly utilized in reef aquaria. Results indicated that medium and large sized crabs consumed more bubble algae than smaller conspecifics. Although, M. sculptus first chose alternative foods to bubble alga (77% and 69% of the time chose pellets and frozen mysids, respectively), algal consumption only decreased significantly if, besides algae, pellets were provided; when only algae were provided, algal consumption was similar to when they were provided with mysids. The prey choice model was used as a conceptual framework to study the mechanisms underlying active selection; food energy content and handling time were measured and food profitability was calculated. Handling time decreased with increasing crab size. Pellets presented a higher profitability than algae but mysids and algae presented similar profitability; this seems to be in agreement with the observed reduced algal consumption when pellets made part of the diet. Mithraculus sculptus feeding behaviour on V. ventricosa recorded with digital high-speed video (DHSV) suggests that as the crab tears the algal cell apart, the cell liquid that contains juvenile cytoplasmatic spheres is released into the water; this behaviour might contribute to algal dispersal and consequently algal infestation. These results seem to indicate that M. sculptus might not be such an efficient bio-controller of the pest V. ventricosa as previously thought, particularly when pellets are used as food; however, its bio-control efficiency might be improved if, mysids are used as food.

Corresponding author
Correspondence should be addressed: Joana Figueiredo Laboratório Marítimo da Guia–IMAR Departamento de Biologia Animal Faculdade de Ciências da Universidade de Lisboa Forte N. S. da Guia, Estrada do Guincho 2750-374 Cascais Portugal email:
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D.J. Brosseau and J.A. Baglivo (2005) Laboratory investigations of food selection by the Asian shore crab, Hemigrapsus sanguineus: algal versus animal preference. Journal of Crustacean Biology 25, 130134.

R. Calado and L. Narciso (2005) Ability of Monaco shrimp Lysmata seticaudata (Decapoda: Hippolytidae) to control the pest glass anemone Aiptasia (Actiniaria: Aiptasidae). Helgoland Marine Research 59, 163165.

J. Chesson (1978) Measuring preference in selective predation. Ecology 59, 211215.

J. Chesson (1989) The effect of alternative prey on the functional response of Notonecta hoffmani. Ecology 70, 12271235.

S. Choy (1986) Natural diet and the feeding habits of the crabs Liocarcinus puber and L. holsatus (Decapoda, Brachyura, Portunidae). Marine Ecology Progress Series 31, 8799.

L.D. Coen (1988a) Herbivory by crabs and the control of algal epibionts on Caribbean host corals. Oecologia 75, 198203.

L.D. Coen (1988b) Herbivory by Caribbean majid crabs: feeding ecology and plant susceptibility. Journal of Experimental Marine Biology and Ecology 122, 257276.

M.H. Depledge (1989) Observations on the feeding behaviour of Gaetice depressus (Grapsidae: Varuninae) with special reference to suspension feeding. Marine Biology 100, 253259.

S.E. Dudas , I.J. McGaw and J.F. Dower (2005) Selective crab predation on native and introduced bivalves in British Columbia. Journal of Experimental Marine Biology and Ecology 325, 817.

R.W. Elner and R.N. Hughes (1978) Energy maximization in the diet of the shore crab Carcinus maenas. Journal of Animal Ecology 47, 103116.

M. Friedlander , N. Weintraub , A. Freedman , J. Sheer , Z. Snovsky , J. Shapiro and G.W. Kissil (1996) Fish as potential biocontrollers of Gracilaria (Rhodophyta) culture. Aquaculture 145, 113118.

S. Gleibs and D. Mebs (1999) Distribution and sequestration of palytoxin in coral reef animals. Toxicon 37, 15211527.

R.N. Hughes and R. Seed (1981) Size selection of mussels by the blue crab Callinectes sapidus: energy maximizer or time minimizer? Marine Ecology Progress Series 6, 8389.

T. Hunter (1984) The energetics of asexual reproduction: pedal laceration in the symbiotic sea anemone Aiptasia pulchella (Carlgren, 1943). Journal of Experimental Marine Biology and Ecology 83, 127147.

S.C. Jewett and H.M. Feder (1982) Food and feeding of the king crab, Paralithodes camtschaticus near Kodiak Island, Alaska. Marine Biology 66, 243250.

S.C. Kempf (1991) A ‘primitive’ symbiosis between the aeolid nudibranch Berghia verrucicornis (A. Costa, 1867) and a zooxanthella. Journal of Molluscan Studies 57, 7585.

R. Kennish , G.A. Williams and S.Y. Lee (1996) Algal seasonality on an exposed rocky shore in Hong Kong and the dietary implications for the herbivorous crab Grapsus albolineatus. Marine Biology 125, 5564.

S.Y. Lee and R. Seed (1992) Ecological implications of cheliped size in crabs: some data from Carcinus maenas and Liocarcinus holsatus. Marine Ecology Progress Series 84, 151160.

J. Lin (1991) Predator–prey interactions between blue crabs and ribbed mussels living in clumps. Estuarine and Coastal Shelf Science 32, 6169.

S.M. Louda (2005) A nontechnical introduction to ‘Biocontrol as usual’. Ecology 86, 16601661.

B.F.J. Manly (1974) A model for certain types of selection experiments. Biometrics 30, 281294.

B.F.J. Manly (1993) Comments on design and analysis of multiple-choice feeding-preference. Oecologia 93, 149152.

J.J. McDermott (1998) The western Pacific brachyuran Hemigrapsus sanguineus (Grapsidae) in its new habitat along the Atlantic coast of the United States: geographic distribution and ecology. ICES Journal of Marine Science 55, 289298.

M. Mistri (2004) Prey preference of Carcinus aestuarii: possible implications with the control of an invasive mytilid and Manila clam culture in a northern Adriatic Lagoon. Aquaculture 230, 261272.

J.L. Olsen and J.A. West (1988) Ventricaria (Siphonocladales–Cladophorales complex, Chlorophyta), a new genus for Valonia ventricosa. Phycologia 27, 103108.

R.K.G. Paul (1981) Natural diet, feeding and predatory activity of the crabs Callinectes arcuatus and C. toxotes (Decapoda, Brachyura, Portunidae). Marine Ecology Progress Series 6, 9199.

G. Penha-Lopes , A.L. Rhyne , J. Lin and L. Narciso (2005) The larval rearing of the marine ornamental crab, Mithraculus forceps (A. Milne-Edwards, 1875) (Decapoda: Brachyura: Majidae). Aquaculture Research 36, 13131321.

G. Penha-Lopes , A.L. Rhyne , J. Lin and L. Narciso (2006) Effects of temperature, stocking density and diet on the growth and survival of juvenile Mithraculus fórceps (A. Milne-Edwards, 1875) (Decapoda: Brachyura: Majidae). Aquaculture Research 37, 398408.

R.W. Rangeley and M.L.H. Thomas (1987) Predatory behavior of juvenile shore crab Carcinus maenas (L.). Journal of Experimental Marine Biology and Ecology 108, 191197.

A.L. Rhyne , G. Penha-Lopes and J. Lin (2005) Growth, development, and survival of larval Mithraculus sculptus (Lamark) and Mithraculus forceps (A. Milne-Edwards) (Decapoda: Brachyura: Majidae): economically important marine ornamental crabs. Aquaculture 245, 183191.

M.C. Romero , G.A. Lovrich , F. Tapella and S. Thatje (2004) Feeding ecology of the crab Munida subrugosa (Decapoda: Anomura: Galatheidae) in the Beagle Channel, Argentina. Journal of the Marine Biological Association of the United Kingdom 84, 359365.

J.E. Smith (2003) Invasive macroalgae on tropical reefs: impacts, interactions, mechanisms and management. Journal of Phycology 39, 53.

T. Thibaut , A. Meinesz , P. Amade , S. Charrier , K. De Angelis , S. Ierardi , L. Mangialajo , J. Melnick and V. Vidal (2001) Elysia subornata (Mollusca) a potential control agent of the alga Caulerpa taxifolia (Chlorophyta) in the Mediterranean Sea. Journal of the Marine Biological Association of the United Kingdom 81, 497504.

D.L. Wolcott and N.J. O'Connor (1992) Herbivory in crabs: adaptations and ecological considerations. American Zoologist 32, 370381.

M.C. Wong and M.A. Barbeau (2005) Prey selection and the functional response of sea stars (Asterias vulgaris Verrill) and rock crabs (Cancer irroratus Say) preying on juvenile sea scallops (Placopecten magellanicus (Gmelin)) and blue mussels (Mytilus edulis Linnaeus). Journal of Experimental Marine Biology and Ecology 327, 121.

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Journal of the Marine Biological Association of the United Kingdom
  • ISSN: 0025-3154
  • EISSN: 1469-7769
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