The shark bay blue swimmer crab portunus armatus, formerly portunus pelagicus, lai et al. Portunus armatus formerly portunus pelagicus, also known as the flower crab, blue crab, blue swimmer crab, blue manna crab or sand crab, rajungan in indonesian, and alimasag in tagalog, kapampangan, and pangasinan, is a large crab found in the intertidal estuaries around most of. Habitat preferences of blue swimming crab portunus pelagicus. Growth and survival of blue swimming crab portunus. The species is similar to portunus trituberculatus in its general appearance. Abstract portunus pelagicus s wa collected at regular intervals from two marine embayments and two estuaries on the lower west coast of australia and from a large embayment located approximately 800 km farther north. Evaluation of water quality parameters, growth and. Blue swimmer crab fishery on 26 march 2009, the department of primary industri es and fisheries was amalgamated with other government departments to form the department of employment, economic development and innovation. The exploitation of rajungan is done by using traps. A commercial trawler sampled portunus pelagicus in six randomly selected sites in the northern half of cockbum sound in each month between august 1971 and january 1973 except for may 1972 penn, 1977, and subsequently. This file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it.
This study describes the digestive enzyme profiles from foregut contents of the blue swimming crab, portunus pelagicus l. Portunus pelagicus fishery based on the latest version of the marine stewardship councils certification requirements version 2. There are some variations on the carapace of blue swimming crabs portunus pelagicus from makassar strait. A stock assessment of blue swimming crabs, portunus pelagicus was conducted with crab gill nets and collapsible crab traps at kung krabaen bay, in the. The species is usually found in large numbers in shallow bays with sandy bottoms williams 1981. Reproductive biology of the blue swimmer crab portunus. Blue swimmer crab fishery department of agriculture and. Although portunus pelagicus linnaeus, 1758 feeds on macroscopic food, identi. Natural food and feeding of the commercial blue swimmer crab. A marinederived, heparan sulphatecontaining glycosaminoglycan extract, isolated from the crab portunus pelagicus, was identified to inhibit human bace1 with comparable bioactivity to that of mammalian heparin ic 50 1. The blue swimming crab portunus pelagicus linnaeus, 1758 has a broad geographical distribution throughout the indopacific region kailola et al.
The blue swimmer crab fishery comprises tidal waters on the east. Stock assessment and reproductive biology of the blue swimming crab, portunus pelagicus, in bandar abbas coastal waters was conducted from august 2006 to july 2007. Response and behavior of rajungan portunus pelagicus on. Adult male mature and immature and female ovarian maturation stages 14 blue swimming crabs were assayed for the presence of digestive enzymes protease, trypsin, amylase and lipase in the foregut. Fishery, biology and population dynamics of the marine crabs. The effects of salinity on the survival, growth and. Portunus pelagicus a commercially important crab species found in chilika lagoon constitutes about 20% of the total crab production. Food and feeding of the blue swimmer crab, portunus pelagicus linnaeus, 1758 decapoda, brachyura along the coast of mandapam, tamil nadu, india by jose josileen1 central marine fisheries research institute, p. Blue swimming crab, portunus pelagicus, is distributed throughout the coastal waters of tropical regions of the indowest pacific 1,2 where it supports a significant fishing industry 3 around the world.
Portunus pelagicus 3 14736736 197108 3 14736736 44210208. The blue swimming crab portunus pelagicus linnaeus, 1758 is one of the commercially exploited crab fishery resources in vietnam. Potential of chitosan from local crab portunus pelagicus. Blue swimmer crabs portunus pelagicus, also known as sand crabs, are found in coastal and estuarine waters along the entire queensland coast but are fished mainly in the southern part of queensland. Digestive enzyme profiles from foregut contents of blue. Genomewide snp analyses reveal population structure of. Natural diet of blue swimming crab, portunus pelagicus at. Female crabs possessed more species of parasites and symbionts, and had a more specialized fauna than did male crabs. Portunus pelagicus exploitation status fully fished an important recreational and commercial species. Portunus pelagicus linnaeus, 1758 under different water salinities. Pdf a revision of the portunus pelagicus linnaeus, 1758. Growth performance and survival rate of portunus pelagicus. The blue swimmer crab portunus pelagicus has a wide geographical distribution and is an important commercial species throughout the subtropical waters and.
It has great potential to become an important fishery export commodity 2 6, since in recent years, domestic and international demand has increased from year to year 7, 8. The crab portunus pelagicus belongs to the portunidae family, is a marine biota resource. Potential of chitosan from local crab portunus pelagicus to enhance storability of musa paradisiaca l. Changes in density, age composition, and growth rate of. Materials and methods experimental site this experiment was carried out at the hatchery complex. Portunus segnis, portunus reticulatus, and portunus armatus. Portunus pelagicus, photoperiod, larval rearing, larval development, larval survival. They are an important species for both recreational and commercial fishers. Potential waste of local crab carapace portunus pelagicus as a source of chitosan as an active layer that can protect bananas has been studied. Two experiments were performed to determine the effects of salinity on survival, growth and haemolymph osmolality of early juvenile p. Among the abiotic characteristics that influence the developmental period and survival rate of. The fishery is divided into two areas spencer gulf and gulf st vincent, figure 1 with two types of commercial fishery operating in each pot and marine scalefish.
A taxonomic species within the family portunidae flower crab. Efficiency of shelters in reducing cannibalism among juveniles of the marine blue swimmer crab, portunus pelagicus. Primary producers are principally green plants and certain bacteria. Rajungan portunus pelagicus is one of the fisheries resources that has important economic value as an export commodity. The municipal fishery sector dominates production in the fishery, in 2011 it accounted for approximately 96% of blue swimming. You may do so in any reasonable manner, but not in any way that. Embryonic development and hatching rate of blue swimming crab. Blue crab portunus pelagicus fishery 200809 iv figure 3. Samples were collected by gill nets and traps, at six study sites during may 20 and september 2014. Trophic levels and food chain central marine fisheries. The pdf file you selected should load here if your web browser has a pdf reader plugin. Minimum parsimony spanning network constructed with tcs of portunus pelagicus complex using a 573basepair fragment from the coi gene.
The crab uses its mouthparts to chop the food into small pieces and then the gastric mill ossicles further reduce the food to unidenti. They are more southerly in habitat than the southeast and east asian portunus pelagicus, sensu. Distribution pattern and habitat shifts during ontogeny of. This file is licensed under the creative commons attributionshare alike 4. The success of catching using traps is influenced by several factors such as traps construction, soaking time and bait, the research method uses experimental methods. This study determined the distribution and ontogenetic habitat shifts of portunus pelagicus in coastal habitats in thailand. Portunus pelagicus from moreton bay, eastern australia jefrey d. This crab is a very important commercial species in many countries, such as australia, japan, india and the southeast asian countries, particularly thailand. Portunus pelagicus, commonly known as blue swimming crab bsc is a highly valuable marine crab in india and bulk of the bsc products are exported to us. Department of fisheries data files as a mean catch rate, i. Shields abstract fifteen parasites and symbionts were found in the tissues, in the branchial chambers, and on external surfaces of the sand crab portunus pelagicus.
The blue swimmer crab, portunus pelagicus, is an emerging aquaculture species in the indopacific. Pdf biology aspect of blue swimming crabs portunus pelagicus. A stock assessment of the blue swimming crab portunus pelagicus. Portunus sanguinolentus herbst, 1783 inhabit the same area but it is easily distingushed by their 3 prominent maroon to red spots on posterior of. A total of 424 male and 348 female crabs were taken to the laboratory for length, weight and reproductive biometry. The proportion of females pink bars and males blue bars by weight in spencer gulf from commercial logbook data from 199798 to 200809. Efficiency of shelters in reducing cannibalism among. The feeding ecology of the blue swimming crab, portunus. Reproductive biology of blue swimming crab portunus pelagicus. Pdf blue swimming crab portunus pelagicus is one of exported comodities with high economic value. Blue swimming crab fisheries occur throughout the philippines. The growth of hatchery produced portunus pelagicus crabs was monitored under laboratory conditions by recording growth at each moult from the 1st crab instar.
Do the age compositions and growth of the crab portunus. The blue swimmer crab is widely distributed around the. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. Portunus pelagicus an overview sciencedirect topics. The fishery is divided into two areas spencer gulf and gulf st vincent, figure 1 with two types of commercial fishery operating in. This is the first study to provide a broad survey of genetic diversity, population structure and migration patterns of p. This research informs spatial and temporal sex ratio, gonadal development, gonado somatic index gsi and first size sexual maturity of male and. This crab is a very important commercial species in many countries, such as australia, japan. A glycosaminoglycan extract from portunus pelagicus.
Stock assessment and reproductive biology of the blue. However, the spermatophores, found in the anterior and midvd, contain immature spermatozoa. Reproductive performance and larval quality of first and. Therefore, the present work aims to determine the effects of different culture system on water management, growth and body composition of marine crab p. Parasites and symbionts of the crab portunus pelagicus. We then present aspects of the gross and microscopic appear ance, ultrastructure and transmission of the new species of hematodinium from p. Some authors have recently extracted three species from portunus pelagicus, sensu lato. Stock and fishery assessment report of blue swimming crab portunus pelagicus linnaeus, 1758 in kien giang waters, viet nam vu viet ha, tu.
Trophic levels and food chain at the base of the food chain lies the primary producers. The fishery is based on the capture of a single species, portunus pelagicus, although other crab species may also be landed, such as spider, velvet and rock crabs. Studies on reproductive biology and ecology of blue. A birth date of 1 december, derived from estimates of the peak time of spawning, was used to determine the average. The salinities tested for the first experiment were 10, 15, 25 and 40 ppt, and for the second. Biological data collected for wallis lake indicate high fishing pressure in this estuary, with fishing mortality estimated to be greater than natural mortality. In the swimming crab, portunus pelagicus, sperm masses are compacted into irregular triangular shapes, surrounded by two secretions from columnar epithelial cells of anterior vas deferens avd stewart et al. Portunus is a genus of crab which includes several important species for fisheries, such as the blue swimming crab, portunus pelagicus and the gazami crab, p.