FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2800970638> ?p ?o ?g. }

• W2800970638 abstract "SummaryThis review summarises (i) the biology and behaviour of portunid crabs, focusing on the commercially and recreationally important species within the genera Callinectes, Portunus and Scylla, (ii) identifies previously successful aquaculture/restocking efforts for portunids and (iii) detail any successful aquaculture methods/techniques for these species.Portunids are highly fecund, fast growing, short-lived species, with high natural mortalities and whose populations are characterised by an abundance of immature individuals and fewer older, mature individuals. The dietary composition of these crabs, which are opportunistic, is influenced significantly by ontogeny, moult stage, habitat and season. Bivalves, gastropods, crustaceans and teleosts are the major prey categories consumed, with larger crabs consuming more mobile prey. Portunid crabs are more active during night than day, when many species bury. They have developed intricate mating and moulting behaviours that are influenced by water temperature and salinity. The females of many species undertake migrations associated with reproduction and the release of hatching eggs.Portunid fisheries occur globally, with the greatest capture rates occurring in the Indo-West Pacific. Global catches of portunid crabs are still increasing despite the relative stability in the catch rates of world finfish fisheries. High fishing pressure on many established portunid fisheries, exacerbated by environmentally driven fluctuations in recruitment, has led to several localised depletions. The management of portunid fisheries varies greatly between and within countries, but all employ input (i.e. licences, spatial and temporal closures) and/or output controls (size, sex and catch limits). Aquaculture-based enhancement has been suggested as a possible means is increasing stocks in depleted fisheries.A number of restocking and stock enhancement programs have been implemented around the world, including USA, Japan and South East Asia. These were all initiated in response to declines in stocks and, in each case, successful hatchery techniques were developed to enable small-scale production to occur. Releases were found to be most successful when the hatchery-reared individuals were released as crablets and not megalopae. Noting that far smaller numbers of individuals were produced due to cannibalism. Typically, release programs for brachyuran crabs appear to have been successful, albeit too different extents. For the most part, the evaluations of the effectiveness of these releases have been carried out at the pilot scale with only the culture of P. trituberculatus scaled up (~27-35 million juveniles per year). Species with fast growth rates, limited home ranges and a large economic value are likely to be the most appropriate species to culture and release. Any future release program for a portunid is likely to require extensive research and development, particularly to scale up production, and thus the biggest gains in this field to-date have come from increased knowledge rather than increased stocks.In terms of aquaculture, broodstock are typically collected from the wild using commercial fishers and to increase the success of the hatch, conditions in the culture environment should be similar to those in the waters the broodstock were collected from. If inseminated but not berried broodstock are collected, crabs require access to sandy substrate to spawn. Maintaining appropriate water quality is paramount and P. pelagicus larvae require relatively warm (25-30 °C) water at near-marine salinities (30-35 ppt) that is well oxygenated and of a slightly basic pH (8). The larvae require different feed throughout the transition from zoea to megalopa. Typically, zoea are fed a range of microalgae strains (which also enrich live feeds and provide a greenwater culture) and rotifers, with Artemia being provided once the larvae reach the later zoeal stages. At the crablet stage, diet in the hatchery comprises commercial shrimp/prawn feeds. Stocking density is important, with faster growth and greater survival occurring at lower densities. Cannibalism in portunids starts at the megalopa stages and lower stocking densities and the provision of greater substrate complexity reduce juvenile cannibalism. Portunid species have been shown to actively select more complex habitats, such as seagrass, macroalgae, pebbles and crushed shells over finer sand substrates and artificial habitats, such a nets, have also been successful in increasing survival." @default.
• W2800970638 created "2018-05-17" @default.
• W2800970638 creator A5029661232 @default.
• W2800970638 creator A5041304494 @default.
• W2800970638 creator A5044904060 @default.
• W2800970638 creator A5055688470 @default.
• W2800970638 date "2017-06-01" @default.
• W2800970638 modified "2023-09-27" @default.
• W2800970638 title "Aspects of the biology and husbandry of portunid crabs relevant to aquaculture-based enhancement and fisheries management" @default.
• W2800970638 hasPublicationYear "2017" @default.
• W2800970638 type Work @default.
• W2800970638 sameAs 2800970638 @default.
• W2800970638 citedByCount "0" @default.
• W2800970638 crossrefType "journal-article" @default.
• W2800970638 hasAuthorship W2800970638A5029661232 @default.
• W2800970638 hasAuthorship W2800970638A5041304494 @default.
• W2800970638 hasAuthorship W2800970638A5044904060 @default.
• W2800970638 hasAuthorship W2800970638A5055688470 @default.
• W2800970638 hasConcept C188382862 @default.
• W2800970638 hasConcept C18903297 @default.
• W2800970638 hasConcept C202041845 @default.
• W2800970638 hasConcept C2777869114 @default.
• W2800970638 hasConcept C2780926496 @default.
• W2800970638 hasConcept C2909208804 @default.
• W2800970638 hasConcept C505870484 @default.
• W2800970638 hasConcept C514101110 @default.
• W2800970638 hasConcept C84766238 @default.
• W2800970638 hasConcept C86803240 @default.
• W2800970638 hasConcept C86909935 @default.
• W2800970638 hasConceptScore W2800970638C188382862 @default.
• W2800970638 hasConceptScore W2800970638C18903297 @default.
• W2800970638 hasConceptScore W2800970638C202041845 @default.
• W2800970638 hasConceptScore W2800970638C2777869114 @default.
• W2800970638 hasConceptScore W2800970638C2780926496 @default.
• W2800970638 hasConceptScore W2800970638C2909208804 @default.
• W2800970638 hasConceptScore W2800970638C505870484 @default.
• W2800970638 hasConceptScore W2800970638C514101110 @default.
• W2800970638 hasConceptScore W2800970638C84766238 @default.
• W2800970638 hasConceptScore W2800970638C86803240 @default.
• W2800970638 hasConceptScore W2800970638C86909935 @default.
• W2800970638 hasLocation W28009706381 @default.
• W2800970638 hasOpenAccess W2800970638 @default.
• W2800970638 hasPrimaryLocation W28009706381 @default.
• W2800970638 hasRelatedWork W102299794 @default.
• W2800970638 hasRelatedWork W149407843 @default.
• W2800970638 hasRelatedWork W1536704555 @default.
• W2800970638 hasRelatedWork W1966713647 @default.
• W2800970638 hasRelatedWork W1993795269 @default.
• W2800970638 hasRelatedWork W204589796 @default.
• W2800970638 hasRelatedWork W2117345369 @default.
• W2800970638 hasRelatedWork W2160756170 @default.
• W2800970638 hasRelatedWork W2186185932 @default.
• W2800970638 hasRelatedWork W2312286077 @default.
• W2800970638 hasRelatedWork W2499267156 @default.
• W2800970638 hasRelatedWork W2524351051 @default.
• W2800970638 hasRelatedWork W2530110445 @default.
• W2800970638 hasRelatedWork W2614931823 @default.
• W2800970638 hasRelatedWork W2620326529 @default.
• W2800970638 hasRelatedWork W2887510779 @default.
• W2800970638 hasRelatedWork W2904689874 @default.
• W2800970638 hasRelatedWork W3002137661 @default.
• W2800970638 hasRelatedWork W3134708650 @default.
• W2800970638 hasRelatedWork W3140180743 @default.
• W2800970638 isParatext "false" @default.
• W2800970638 isRetracted "false" @default.
• W2800970638 magId "2800970638" @default.
• W2800970638 workType "article" @default.