Asian Carp Problem

[MOPanfisher]

Interesting I have never heard that.

[BilletHead]

  Oh good grief! NOOOOOOOOOOOOOOOOOOOO those fish are so dead many years ago. And they would of had to swim though a hundred acres of pasture to make it to the nearest water:)   Never handled one and closest one wizzed past my face but they sound pretty nasty. But like Snagged said I think it would be neat on a fly rod!

BilletHead

[fishinwrench]

They do seem like very fragile creatures.   If you even drop one in the boat or toss one on the ground they spew blood and chunks everywhere.   I've never seen a nastier fish.

[Mitch f]

They are also extremely skittish fish, you can see them on the top from 50 yards away gulping plankton. Even when drifting or using the trolling motor ever so slightly, you cannot seem to sneak up on them.

[fishinwrench]

1 hour ago, Mitch f said:

They are also extremely skittish fish, you can see them on the top from 50 yards away gulping plankton. Even when drifting or using the trolling motor ever so slightly, you cannot seem to sneak up on them.

That's the reason I don't care much about fishing the Osage anymore.  If there are Asian's anywhere nearby then you can't make a cast without spooking every fish for 50 yards.  They freak out so bad that they alert everything that swims.  

[straw hat]

Asian Carp

Grass carp, black carp, bighead carp, and silver carp are native to Asia, and in North America are referred to as Asian carps. I will address each species seperately.

Grass Carp

Ecology

This species occurs in lakes, ponds, pools, and backwaters of large rivers, preferring large, slow-flowing or standing water bodies with vegetation. In the wild, grass carp spawn in fast-moving rivers, and their eggs, which are slightly heavier than water, develop while drifting downstream, kept in suspension by turbulence. The eggs are thought to die if they sink to the bottom.Typically, spawning occurs in the spring when water temperatures reach 59-63°F, and under rising water conditions.

The grass carp tolerates cold water and also flourishes and grows at rapid rates in warm waters such as those found in Florida. These herbivorous fish may grow at a rate of 2 pounds (0.91 kg) or more per month when sufficient vegetation is available. The young fish grow at a much faster rate than older, mature fish, and females grow faster than males. In Florida, some fish have grown to 40 pounds (18 kg) with an apparent life span of approximately 10 years. Their feeding habits make them ideal as vegetation control agents, as they are capable of consuming 40% to 300% of their body weight per day in plant material. Each female lays 500,000 eggs per brood on average.

Adults of the species feed primarily on aquatic plants. They feed on higher aquatic plants and submerged terrestrial vegetation, but may also take detritus, insects, and other invertebrates.

In the United States, the species was first imported in 1963 from Taiwan and Malaysia to aquaculture facilities in Alabama and Arkansas. The first release is believed to have been an accidental escape in 1966 from the US Fish and Wildlife Service's Fish Farming Experimental Station in Stuttgart, Arkansas, followed by planned introductions beginning in 1969. Subsequently there have been widespread authorized, illegal, and accidental introductions; by the 1970s the species had been introduced to 40 states, and it has since been reported in 45 of the country’s 50 states. In 2013 it was determined to be reproducing in the Great Lakes Basin. It is still stocked in many states as an effective biocontrol for undesirable aquatic vegetation, many species of which are themselves introduced.

Grass carp require long rivers for the survival of the eggs and very young fish.

The species was introduced in the Netherlands in 1973 for overabundant aquatic weed control. The release into national waters is controlled and regulated by the Dutch Ministry of Agriculture, Nature and Food Quality. Because grass carp mainly reproduce in water of 25°C (77°F), which is much higher than the water temperature reaches during the mating season in the Netherlands, grass carp populations must be maintained by artificial means, which is done by the person responsible for the water body in which the fish were introduced. Where grass carp populations are maintained through stocking as a biocontrol for noxious weeds, they should be returned to the water alive and unharmed.

When used for weed control, often the fish introduced to the pond or stream are sterile, triploid fish. The process for producing triploid fish involves shocking eggs with a rapid change in temperature or pressure. This process is not usually 100% effective, so the young are usually tested for triploidy before being sold.

Grass carp grow large and are strong fighters on a rod and reel, but because of their vegetarian habits and their wariness, they can be difficult to catch. Chumming with corn adds to success. They will eat canned corn, cherry tomatoes, and, despite their primarily herbivorous habits, will also sometimes eat other animals. Chumming with white bread, and a piece of bread pinched on a hook and floated on the surface works well, especially for pond grass carp. The fish are popular among bowfishers where bowfishing for them is legal.

Detrimental Effects -Their herbivorous feeding can dramatically reduce aquatic vegetation and they can harm water quality by increasing phosphorus levels.

Impact of Introduction: Various authors (e.g., Shireman and Smith 1983; Chilton and Muoneke 1992; Bain 1993) have reviewed the literature on Grass Carp; most also discuss actual and potential impacts caused by the species' introduction. Shireman and Smith (1983) concluded that the effects of Grass Carp introduction on a water body are complex and apparently depend on the stocking rate, macrophyte abundance, and community structure of the ecosystem. They indicated that numerous contradictory results are reported in the literature concerning Grass Carp interaction with other species. Negative effects involving Grass Carp reported in the literature and summarized by these authors included interspecific competition for food with invertebrates (e.g., crayfish) and other fishes, significant changes in the composition of macrophyte, phytoplankton, and invertebrate communities, interference with the reproduction of other fishes, decreases in refugia for other fishes, and so on. In their overview, Chilton and Muoneke (1992) reported that Grass Carp seem to affect other animal species by modifying preferred habitat, an indirect effect. However, they also indicated that grass carp may directly influence other animals through either predation or competition when plant food is scarce. In his review, Bain (1993) stated that Grass Carp have significantly altered the food web and trophic structure of aquatic systems by inducing changes in plant, invertebrate, and fish communities. He indicated that effects are largely secondary consequences of decreases in the density and composition of aquatic plant communities. Organisms requiring limnetic habitats and food webs based on phytoplankton tend to benefit from the presence of Grass Carp. On the other hand, Bain reported that declines have occurred in the diversity and density of organisms that require structured littoral habitats and food chains based on plant detritus, macrophytes, and attached algae. Removal of vegetation can have negative effects on native fish, such as elimination of food sources, shelter, and spawning substrates (Taylor et al. 1984). Hubert (1994) cited a study that found vegetation removal by Grass Carp lead to better growth of Rainbow Trout (Oncorhynchus mykiss) due to increases in phytoplankton and zooplankton production, but it also lead to higher predation on Rainbow Trout by Double-crested Cormorants (Phalacrocorax auritus) due to lack of cover, and changes in diet, densities, and growth of native fishes. Although Grass Carp are often used to control selected aquatic weeds, these fish sometimes feed on preferred rather than on target plant species (Taylor et al. 1984). Increases in phytoplankton populations is a secondary effect of Grass Carp presence. A single Grass Carp can digest only about half of the approximately 45 kg of plant material that it consumes each day. The remaining material is expelled into the water, enriching it and promoting algal blooms (Rose 1972). These blooms can reduce water clarity and decrease oxygen levels (Bain 1993). In addition to the above, Grass Carp may carry several parasites and diseases known to be transmissible or potentially transmissible to native fishes. For instance, it is believed that Grass Carp imported from China were the source of introduction of the Asian tapeworm Bothriocephalus opsarichthydis (Hoffman and Schubert 1984; Ganzhorn et al. 1992). As such, the species may have been responsible indirectly for the infection of the endangered Woundfin Plagopterus argentissimus (by way of the red shiner Cyprinella lutrensis) (Moyle 1993). Wittmann et al. (2014) performed a meta-analysis of ecological effects of Grass Carp, finding an overall negative impact to biota (primarly through negative effects on macrophytes, with mixed results in other taxonomic groups) and an alteration of water quality (primarily change in conductivity and salinity) in stocked areas.

Details of the effects of grass carp in...

http://apms.org/japm/vol44/v44p01.pdf

http://el.erdc.usace.army.mil/ansrp/ANSIS/html/ctenopharyngodon_idella_grass_carp.htm

http://www.apms.org/japm/vol47/v47p001_2009.pdf

Next post....Black Carp

　

[straw hat]

Black Carp

It is native to lakes and rivers in East Asia, ranging from the Amur Basin, through China, to Vietnam. The black carp can reach up to 1.8 m (5.9 ft) in length and 35 kg (77 lb) in weigth.

The nature of the black carp's diet has led to its use in the United States in the control of snails in aquaculture. Snails are obligate alternate hosts of trematode pests that can cause substantial losses to aquaculture crops. Some state aquaculture laws require the carp to be bred as triploids, to render them sterile, and thus minimize the potential for the fish to escape and create self-sustaining populations. However, the use of triploids does require the maintenance and use of fertile diploid brood stock at least at some location, for production of the triploids.

No state allows the intentional release of black carp, sterile or otherwise. However, the United States Geological Survey reported seven confirmed black carp were caught in the Mississippi River basin. Rivers where black carp have been captured also include the White in Arkansas, the Atchafalaya and Red in Louisiana, and the Osage in Missouri. Some of the captured fish have been confirmed to be diploid and assumed fertile; one has been confirmed to be a triploid and assumed sterile. In Louisiana, many other reports by knowledgeable fishers of their capture have not been verified by biologists.

Black carp are considered to be a serious threat to mollusks native to the United States, many of which are critically endangered. In 2007, the black carp was listed as an "injurious species" under the Lacey Act. It is thus illegal in most cases to transport live black carp, whether sterile or fertile, into the United States or across state lines. In states where legal, black carp can still be possessed.

　

 

This species can be found in rivers, streams, or lakes; however, it requires large rivers to reproduce (Nico et al. 2005). Reproduction takes place in late spring and summer when water temperatures and/or water levels rise (Nico et al. 2005). Both male and female black carp are broadcast spawners; females are capable of releasing hundreds of thousands of eggs into flowing water, which then develop in the pelagic zone (Nico et al. 2005). After fertilization, the eggs become semiboyant (Sukhanova, 1967 as cited in Nico et al. 2005). They hatch in 1 to 2 days, depending on water temperatures, and the yolk sac is absorbed in 6 to 8 days (Nico et al. 2005). They become sexually mature at 4 to 6 years after which they migrate back to their spawning grounds (Nico et al. 2005). Successful reproduction is known only from riverine habitats (Nico et al. 2005). Lifespan probably is greater than 15 years (Biro, 1999 as cited in Nico et al. 2005). Grows to 77 lbs.

During the 1990s, it was reported that the number being held by fish farmers and other entities in a few southern states totaled well over 400,000 individuals, including triploids and diploids (M. Freeze, memo to B. Collins, U.S. Department of Agriculture, Stuttgart, Arkansas). At that time, there were found privately owned aquaculture facilities, located in Arkansas and Missouri, and each reportedly held more than 100,000 diploid and triploid black carp." Relatively few commercial fishers in the Mississippi River basin are experienced in fishing large rivers or use appropriate gear (e.g., large hoop nets placed in deep water) for catching black carp (Nico et al. 2005; L. G. Nico, pers. comm.).

Detrimental Effects - There is high potential that the black carp would negatively impact native aquatic communities by feeding on, and reducing, populations of native mussels, crayfish and snails, and many species of fish (feed on fish eggs) many of which are considered endangered or threatened (Nico et al. 2005). Given their size and diet preferences, black carp have the potential to restructure benthic communities by direct predation and removal of algae-grazing snails. Mussel beds consisting of smaller individuals and juvenile recruits are probably most vulnerable to being consumed by black carp (Nico et al. 2005). Furthermore, based on the fact that black carp attain a large size (well over 1 meter long), both juvenile and adult mussels and snails of many species would be vulnerable to predation by this fish (Nico et al. 2005). Fish farmers report that black carp are very effective in reducing the numbers of snails in some ponds. Recently, Wui and Engle (2007) argued that black carp can eliminate 100% of the snails in a single pond. Although their assumption that black carp are capable of eliminating all common pond snails in ponds is open to debate, the effectiveness of black carp in significantly reducing snail populations in aquaculture ponds indicates that any black carp occurring in the wild may cause significant declines in certain native mollusk populations in North American streams and lakes (Nico et al. 2005). Because the life span of black carp is reportedly over 15 years, sterile triploid black carp in the wild would be expected to persist many years and therefore have the potential to cause harm native mollusks by way of predation (Nico et al. 2005). This species has been proposed as a biological control for the introduced zebra mussel Dreissena polymorpha. Although the subject has been debated, to date, there is no experimental evidence that indicates black carp would be effective in controlling zebra mussels. Because black carp do not have jaw teeth and their mouths are relatively small, it is unlikely that these fish are capable of breaking apart zebra mussel rafts (Nico et al. 2005).

Distribution in Missouri: This fish has been found in the Mississippi River system, including our own Osage River, where in 1994 about 30 reportedly escaped from a fish farm during a high water event and entered that river. Because of its detrimental effect on native species, it is illegal to transport live black carp across state lines or to introduce it to any waters in the United States. Unfortunately, young black carp and young grass carp are difficult to distinguish, and introductions of grass carp may inadvertently also include black carp. MoDC.

Establishment of populations in the wild could have serious adverse impacts,

due to predation on native mollusc species, including threatened and endangered

species, fingernail clam populations, a primary food source of migrating

waterfowl and fish, and Black carp are host to parasites, flukes, and bacterial and viral diseases and could possibly transfer these to other fish species

　

https://www.whitehouse.gov/sites/default/files/omb/assets/omb/oira/1018/meetings/637.pdf

A government research paper saying the economical loss to commercial fish operations if we DON'T use Black Carp would be terrible. No mention of hte damaging effect on our economy due to its effects on the ecisystem and other species.

http://link.springer.com/article/10.1007/BF02764787

Generating sterile triploids. Only 50% were sterile.

http://www.bioone.org/doi/abs/10.1899/27.3.BR.800.1?prevSearch=

http://www.tandfonline.com/doi/abs/10.1080/02705060.2013.800826

http://www.fwspubs.org/doi/full/10.3996/112012-JFWM-101

http://link.springer.com/article/10.1007/s10530-014-0708-z

http://www.banglajol.info/index.php/BJZ/article/view/26140

http://www.cerc.usgs.gov/pubs/center/pdfDocs/black_carp.pdf

http://onlinelibrary.wiley.com/doi/10.1002/jmor.20430/abstract

http://onlinelibrary.wiley.com/doi/10.1002/adem.201200304/abstract

http://www.sciencedirect.com/science/article/pii/S1049964401909673

And many many more....

　

　

[Greasy B]

 

2 hours ago, straw hat said:

Black carp are considered to be a serious threat to mollusks native to the United States, many of which are critically endangered. In 2007, the black carp was listed as an "injurious species" under the Lacey Act. It is thus illegal in most cases to transport live black carp, whether sterile or fertile, into the United States or across state lines. In states where legal, black carp can still be possessed.

Good grief, the Black Carp is a self inflicted horror story. Somebody should get their butt kicked for "In states where legal, black carp can still be possessed."

[straw hat]

Good pt Greasy B.

 

From the MDC.

"Invasive. Because of its detrimental effect on native species, it is illegal to transport live black carp across state lines or to introduce it to any waters in the United States. Unfortunately, young black carp and young grass carp are difficult to distinguish, and introductions of grass carp may inadvertently also include black carp."

So if raising and stocking grass carp is legal how do you control the spread of black carp?

Answer - You don't.

[MOPanfisher]

At least one of the asian carp (don't remember if bighead or silver primarily) that when small look an awful lot like gizzard shad.  If you have them side by side its easy to tell the difference, but if the cast net only comes up with small asians it can be tough for non-fish guys to recognize wha they are.