Whiting is one of the few saltwater fish species not yet regulated by the Florida Marine Fisheries Commission. This means that there is no minimum size or limit on the number of fish a person can keep. Legal requirements that apply to recreational crab fishing in Queensland include: In tidal waters, no more than four crab traps or dillies or a combination of both may be used or owned on one boat per person. Gray, CA, Johnson, DD, Young, J & Broadhurst, MK 2004, Discards from the commercial maillet fishery for Dusky Flathead, Platycephalus fuscus, in New South Wales, Australia: spatial variability and initial effects of change in minimum legal length of target species, Fisheries Management and Ecology, 11: 323–333. Gray, C, Larsen, R & Kennelly, S 2000, Using transparent nets to improve size selectivity and reduce bycatch in calf nets, Fisheries Research, 45: 155-166. The current monitoring program began in 2007 and focuses on the southern part of the state, between Baffle Creek (north of Bundaberg) and the QLD-NSW border. Research and monitoring projects are also being conducted on dark flatheads in New South Wales and eastern Victoria. Nominal fishing effort in 2013 (number of fishing days) in general estuary fisheries (approximately 9793 days, added by methodology), deep-sea fisheries (approximately 292 days) and deep-sea trawling – shrimp (approximately 217 days) were among the lowest reported.8 Partly due to the historically low nominal effort, Sandwittling`s catch of 61 tonnes in 2013 was below the long-term average of 145 tonnes. The minimum legal length for commercial and recreational fishers in New South Wales (27 cm TL) reduces fishing pressure on spawning stocks. Recent mortality estimates based on fishing curves indicate that fishing mortality is lower than natural mortality.3 The above data suggest that this stock is unlikely to be overfished due to current fishing pressures.
1.5 m max or interdorsal length 60 cm max (round body shape radii only need to comply with the maximum size limit of 1.5 m) The edges of weed beds, sandbanks and mud are perfect places. The Wittlings live in the shallows and search for the seabed in waters from a few centimeters to 6 meters deep (up to 12 meters for King George), they look for worms, yabbies, pee and other invertebrates discovered by the movement of waves and currents. Bait traps are illegal for fishing in Queensland`s tidal waters. Recreational fishers do not use cartridge traps, funnel traps or round traps in tidal waters and bait traps are covered by these Fishery Regulations. The nominal commercial fishing effort in Queensland in 2013 was much lower than in previous years (3922 days in 2013 compared to 4771 days in 2012 and 5400 days in 2009), which improved the commercial catch rate5. Spending in the recreational fishing sector has decreased since 2016 and the introduction of a property line (30 fish) in 2009 brings the harvest to an acceptable level. The current minimum legal size for sand whiting in Queensland (23 cm total length [TL]) allows some adult fish to spawn at least once. Sand whiting has a high survival rate when released by recreational fishers, reducing the impact of discard mortality on the stock.7 Estimates of sand whiting mortality in Queensland (based on fishing curves) are high. The fishing mortality rate corresponds to the natural mortality rate and indicates a fully exploited stock; However, these mortality estimates have remained stable since 20075. Current fishing pressure is unlikely to lead to overexploitation of this stock. Dark flatheads can live for more than ten years, but are most often harvested at three years of age (Figure 2).
Fish seven years of age or older are less common in harvesting due to the protection afforded by the maximum size limit, i.e. Some seven-year-old fish have lengths greater than the maximum size of 75 cm. In New South Wales, the estuarine seine fishery can result in large amounts of bycatch of undersized organisms and undesirable species, but the use of appropriately sized mesh sizes can reduce mortality of these species.15-18 Studies in New South Wales suggest that gillnets used in estuaries can cause significant bycatch, including catches of undersized individuals of important species19-21. Dark flat heads can be harvested between 40 cm and 75 cm in total length (slit limit). Most fish in this size range are females. Monitoring program personnel measure approximately 1,000 recreational dark flatheads and approximately 2,000 commercially captured dark flatheads each year. Dark flat heads are most often harvested in the size range of 40 to 60 cm (Figure 1). Kennelly, SJ & Gray, CA 2000, Reducing the mortality of discarded undersize Sand Whiting Sillago ciliata in an estuarine sene fishery, Marine & Freshwater Research, 51: 749–53. Fisheries Queensland collects information on the length, sex and age of harvest from both sectors to assess the status of the Queensland component of the stock on the east coast of Australia. Data are integrated into stock assessments and assessments of current fisheries management. Dusky Flathead in Queensland is currently classified as sustainably fished.
Circular hooks and long-tree hooks are popular, with a size #4-6 “J” hook for working in the bay and a size #4 to 2/0 for deep-sea whiting. The minimum size limit is 24 inches fork length (PDF) (opens in a new tab), except that up to five fish with a range length of less than 24 inches can be caught or possessed. The age of many species of fish can be determined by studying their otoliths (ear bones). The age of the fish in years is estimated by identifying and counting opaque bands such as growth rings in a tree. Each year, whole otoliths of about 300 dark flat heads are examined to determine their age. Age is analyzed with the length of the same year`s fish to determine the percentage of fish in each age group within the dark flathead culture (also known as the age structure of the culture). The results show that recreational and commercial fisheries have very similar age structures. Available for download in PDF format www.dpi.qld.gov.au/cps/rde/xbcr/dpi/fishingsizebaglimits.pdf Recent research has shown that, unlike barramundi and yellowfin sea bream, dark flatheads do not change from male to female (protrander hermaphroditism) as they grow (Pollock 2015). The sex of an individual is determined at the juvenile stage and maintained throughout the life of the fish.
The predominance of female fish in larger size classes and older age groups is the result of slowing the growth rates of male fish relative to female fish and longer-lived female fish. In Queensland, the dark flathead is an important target species for the commercial and recreational sector, with the recreational fishing sector estimated at 93 tonnes in 2014. This is more than the commercial sector harvest, which averaged 53 tonnes between 2010. Dusky Flathead can be found along the east coast of Australia, from Cairns in northern Queensland to the Gippsland Lakes in eastern Victoria. In Queensland, coastal rivers and estuarine gillnets have been shown to have minimal environmental impact and are quite selective in their harvesting.13 Bycatch is generally low compared to the target species harvested.13 Fishermen using tunnel networks operate under codes of conduct developed by the industry.14 Sea turtles are released with minimal difficulty, and undersized or unwanted catches are returned alive to the water. For fish or invertebrates not listed in the tables below, a maximum of 20 pieces of baggage per day applies. Finfish bags and size restrictions. Shallow marine habitats are important for juvenile sand whiting, especially during recruitment periods.23,24 Physische Auswirkungen auf die küstennahe Meeresvegetation, die unterirdische Topographie und die Wasserqualität dürften sich nachteilig auf den Sandwittlingbestand auswirken. Halliday, IA, Ley, JA, Tobin, A, Garrett, R, Gribble, NA & Mayer, DG 2001, The effects of net fishing: addressing biodiversity and accesscatch issues in Queensland inshore waters, Fisheries Research and Development Corporation project 97/206, Department of Primary Industries, Queensland.
Zusätzlich zu den individuellen Fang- und Besitzgrenzen für jede oben genannte Art haben alle Korallenriffflossenfischarten eine kombinierte Aufnahme- und Besitzgrenze von 20. Campbell, M 2013, Tactical Research Fund: reducing the impact of discarded recreational fishing tackle on coastal seabirds, Fisheries Research and Development Corporation project 2011/057, Queensland Department of Agriculture, Fisheries and Forestry, Brisbane. O’Neill, MF 2000, Fishery assessment of the Burnett River, Maroochy River and Pumistone Passage, Project report QO99012, Queensland Department of Primary Industries, Brisbane. Laden Sie die App « Qld Fishing 2.0 » über den App Store oder Google Play herunter. The boat limit does not apply to charter boats.