Abstract and References
Transactions on Science and Technology Vol. 5, No. 2, 155 - 170, 2018

The Fishery of the Mangrove Crabs, Scylla spp in Three Selected Areas of the Philippines

Ruby Castrence-Gonzales, Jessie G. Gorospe, Mark Anthonny J. Torres, Helen J. Vicente, Elnor C. Roa, Cesar G. Demayo

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ABSTRACT
The effect of unsustainable fishing practices, on the fishery and biology of the Scylla species was investigated in four stations in the Philippines based on primary and secondary data.  Results show that the combined catch profile revealed a decreasing trend in the last ten years. Evaluation of crabs in the landing stations show that from a total of 644 individuals measured in terms of carapace length, carapace width and body weight, size and sexual maturity, computed length-weight relationships revealed that the growth is allometric and the size of S. serrata is decreasing. It is important to note from the results of the survey that S. serrata was the most exploited since it was shown to be the majority of crabs harvested and sold because they are not only the largest among the three species but because it is popular for both the local and export market. Aquaculture, unregulated fishing practices and the empirical data generated in this study may affect the fishery and biology of the species needing appropriate management interventions especially in regulating the collections of crabs in the wild that are not mature and in reproductive age.


KEYWORDS: Carapace, length-weight, allometric, aquaculture, unregulated fishing

REFERENCES

Angell, C.A. ed.  (1992).  Report of the seminar on mud crab culture and trade. Bay of Bengal Programme, Madras.  BOBP/REP/51. pp. 49-59.

Baliao, D. D, De Los Santos, M. A. & Franco, N. M.  (1999). Pen Culture of mud crab in mangroves. Aquaculture Extension Manual. No. 29, 10pp.

Begum, M., M.M.R. Mamun, S.A.A. & Alam, M.J. (2009). Comparative study of mud crab (Scylla serrata) fattening practices between two different systems in Bangladesh. J. Bangladesh Agril. Univ., 7(1): 151–156.

Brown, I. W.  (1993). Mangrove crabs.  pp. 609-42.  In: Wright, A. and L. Hill eds. Nearshore Marine Resources of the South Pacific.  Institute of Pacific Studies (Suva).  Forum Fisheries Agency (Honiara) and the International Centre for Ocean Development (Canada). 710p.

Catanaon, C. C. (1972). Crab farming in the Philippines. World Farming 14:9

Carpenter, K.E. and V.H. Niem (1998) FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Vol. 2. Cephalopods, crustaceans, holothurians and sharks. Rome, FAO. Pp. 687-1396

Cowan, L. (1984). Crab farming in Japan, Taiwan and the Philippines. Queensland Department of Primary Industries, Brisbane, Qld. Australia Information Series Q184009, pp 43-61.

Department of Agriculture (DA), Region VI. (1988). Fattening mud crabs Scylla serrata in bamboo cages. Fish Extension Rep., Dept. of Agriculture, BFAR, Philippines.

Demopoulos, A. W. J., N. Cormier, K. C. Ewel and B. Fry. (2008). Use of multiple chemical tracers to define habitat use of Indo-Pacific mangrove crab, Scylla serrata (Decapoda: Portunidae).  Estuaries and Coasts: J CER, F 31,371–381.

Demopoulos, A.W.J., B. Fry, and C.R. Smith.  (2007).  Food web structure in exotic and native mangroves: A Hawaii-Puerto Rico comparison.  Oecolog., 153, 675–686.

Edeline, E., A. Le Rouzic, I.J. Winfield, J.M. Fletcher, J.B. James, N.C. Stenseth, L.A. Vøllestad. (2009). Harvest- induced disruptive selection increases variance in fitness-related traits. Proc. R. Soc. B, 276, 4163 – 4171.

Fabricius, J. C. (1798). Entomologia Systematica emendata et aucta, secundum classes, ordines, genera, species adjectis synonimis locis observationibus descriptionibus. Hafniae, Tom. II. Supplementum Entomologiae Systematicae. pages 1- 572. Copenhagen.

FAO. 2008.  Fishstat., FAO, Rome.

FAO Species Identification and Data Programme (FAO/SIDP). (2008). Scylla serrata Species Identification Sheet.  Available online. 

FAO.  (2008).  Species fact sheet: Scylla serrata.  FAO Species identification and data program.  FAO.

Fondo, E.N., E.N. Kimani, and D.O. Odongo.  (2010).  The status of mangrove mud crab fishery in Kenya, East Africa.  Intern. J. Fish. Aquacult. vol. 2(3): 79-86.

Forsskal, P. (1775). "Descriptions animalium, avium, amphibiorum, piscium, insectorum, vermium." (Hauniae.) (Quoted from Keenan et al 1995).

Garcia, B. (1976). Report on marine pollution problems in the Philippines. International workshop on marine pollution in East Asian waters. Intergovernmental Oceanographic Commission of UNESCO. IOC/IWMPEAW/13.

Gillikin, D.P., S. De Grave and J.F. Tack. (2001). The occurrence of the semi-terrestrial shrimp Merguia oligodon (De Man, 1888) in Neosarmatium smithi H. Milne Edwards, 1853 burrows in Kenyan mangroves. Crustaceana, 74(5), 505-508.

Islam, M.S., K. Kodama and H. Kurokura.  (2010).  Ovarian development of the mud crab, Scylla paramamosain, in a tropical mangrove swamp, Thailand.  J. Sci. Res., 2(2),380-389.

Jones, C.G., J.H. Lawton, M. Shachak. (1994). Organisms as ecosystem engineers. Oikos, 69,373–386.

Keenan, C.P.  1999. Aquaculture of mud crab, genus Scylla past, present and future.  pp 9-13.  In: Keenan, C.P.  and A. Blackshaw eds. Mud crab aquaculture and biology.  ACIAR Proceedings Vol. 78. ACIAR, Canberra, Australia.

Kosuge, T.  (2001).  Brief assessment of stock of mud crabs Scylla spp, in Matang Mangrove Forest, Malaysia and proposal for resources management.  Japan Agric. Res. Quart., 35(2),145-148.

Kuntiyo, A. (1992). Fattening of mud crab, Scylla serrata Forskal, in net cages installed in the drain canal of intensive prawn ponds fed with trash fish and prawn pellate. MS Thesis. University of the Philippines in the Visayas. pp. 60.

Marichamy, R. and S. Rajapackiam. (2001). The aquaculture of Scylla species in India.  Asian Fish. Sci. ,14, 231-238.

Mwaluma, J. (2002). Pen culture of the mud crab Scylla serrata in Mtwapa Mangrove System, Kenya. Western Indian Ocean Journal of Marine Science, 1,127-133.

Naylor, R.L., and M. Drew. (1998). Valuing mangrove resources in Kosrae, Micronesia.  Environ. Dev. Econ., 3, 471–490.

Parma, A. M., and W. B. Deriso. (1990). Dynamics of age and size composition in a population subject to sizeselective mortality: effects of phenotypic variability in growth. Can.  Fish. Aquat. Sci., 47,274-289.

Philippine Statistics Authority. 2017.

Samonte, G. P. B. and R.F Agbayani. (1992). Pond Culture of mud crab (Scylla serrata ). An economic analysis. SEAFDEC-ASIAN Aquacult., 14,3-5

Shelley, C. (2008). Capture-based aquaculture of mud crabs (Scylla spp.). In A. Lovatelli and P.F. Holthus (eds). Capture-based aquaculture. Global overview. FAO Fisheries Technical Paper. No. 508. Rome, FAO. pp. 255–269.

Triño, A.T., E.M. Rodriguez, E.B. Coniza, and B. Juanga. (1999).  Mud Crab. SEAFDEC Aquaculture Department, Aquaculture Extension Manual No. 27. 32 pp.

Triño, A.T., O.M. Millamena, C.P. Keenan. (1999). Monosex culture of the mud crab Scylla serrata at three stocking densities with Gracilaria as crab shelter, in: Keenan, C.P.; Blackshaw, A.  Mud crab aquaculture and biology: Proceedings of an international scientific forum held in Darwin, Australia 21-24 April 1997. ACIAR Proceedings, 78: pp. 61-66.

Triño, A.V. and E.M. Rodriguez.  (2002).  Pen culture of mud crab, Scylla serrata, in tidal flats reforested with mangrove trees.  Aquacult., 211,125-134.

Williams M.J. and B.J. Hill. (1982). Factors influencing pot catches and population estimates of the Portunid crab Scylla serrata. Marine Biology, 71,187-192.

Williams, M.J. and J.H. Primavera. (2001). Choosing tropical portunid species for culture, domestication and stock enhancement in the Indo-Pacific, in: Millamena, O.M. et al. Proceedings of the International Forum on the culture of portunid crabs Boracay, Aklan, Philippines (1-4 December 1998). 14(2): pp. 121-142