Chemicals & Hormones
Chemicals & Hormones
SPAWNING HORMONES for Finfish
In nature, reproductive development and spawning in finfish is controlled by environmental factors such as temperature, photoperiod, nutrition, water quality, and presence of spawning substrate. In aquaculture, it is not always possible or economically feasible to replicate nautral conditions especially as many species are now grown some distance from their original geographic location. Thus, endocrine or a combrination of endocrine and environmental manupulations are utilized to facilitate reproduction. In the last decade significant research has been conducted worldwide on ripening fish sexuality using various preparations.
Carp Pituitary Extract (CPE) are acetone dried pituitaries of carps, which are pulverized and can be used to speed up maturation (induced maturation) as well as the spawning process itself (induced spawning). Intramuscular injections are highly effective in increasing the incidence of spawning as well as possibly increasing egg take in certain species. The potential economic benefits of taking eggs earlier (or later) in a given season or in fact eliminating seasonality altogether in certain climates and regions are significant. Carp pituitary extract contains a variety of pituitary hormones, including gonadotropins, which are effective for the induction of final maturation and ovulation. CPE is administered in distilled water or physiological saline and injected intramusculary at a dose of 1-10 Milligram/kg fish. Available in vials of 1 Gramm (= 1000 Milligram).
Luteinizing-Releasing Hormone analogue (LH-RHa) is another item which current research has brought forth yet as a new approach to induce spawning and maturation. Typically, the hypothalmus portion of a fish's brain is stiulated by complex environmental factors to secrete LH-RH which in turn triggers the pituitary gland to release gonadotropic hormones. The gonadotropic hormones travel by way of the general circulation to the gonads (ovary or testes). The gonadal tissue receiving the stimulus of gonadotropin begins the maturation process whereby the fish is ready to begin reproduction or spawning. A specific analogue of LH-RH is many times stronger than the naturally occurring one. Research has shown this to be the most potent maturation and spawning aid. Additionally, the LH-RH "a" analogue is not specific to any particular species and should be applicable universally to all species. LH-RH(a) then deals with maturation and spawning at a higher "command level" than do pituitary extracts which are essentially gonadotropic agents. LH-RH(a) is administered in distilled water or physiological saline and injected intramusculary at a dose of 1-100 Microgram/kg fish. Available in vials of 1 Milligram (= 1000 Microgramm).
Domperidone is a dopamine antagonist which is used in conjnction with synthetic hormone analogs. Species such as Acipenseriformes, Salmoniformes and most marine species can be induced to ovulate with synthetic hormones alone. Other species such as Cypriniformes and Siluriformes where dopamine plays a strong role in inhibiting the release of gonadotropin from the pituitary gland require simultaneous treatment with a synthetic hormone and an effective dopamine antagonist. We offer a finished product which contains GnRHa and domperidone which is injected intramusculary at a dose of 0.1-0.5 Milliliter/kg fish. Available in vials of 10 Milliliter.
TRANQUILIZERS for Aquatic Animals
Tricaine-Methanesulfonate (MS-222) is a highly versatile anesthetic intended for the temporary immobilizatin of fish, amphibians and other aquatic cold blooded animals and the most widely used and trusted anesthetic use in aquaculture, fishery and veterinary settings. It has long been recognized as a valuable handling tool during surgical operation, stripping, weighing, measuring, tagging, transportation, photography etc. Tricaines are not affected by salinity. Fish anethetised show rapid reversibility when placed in fresh water. Further, the level of sedation is proportional to the strength of anesthetizing baths. It is available as a white, water soluble powder available in bottles of 100 or 1000 grams administered by bath, used for anesthesia and sedation at a dose of 20-200 mg/l (20-200 ppm), with an induction time of 2-20 minutes.
Eugénol-Methoxyphenol (Clove-oil) is a very usefull, natural and environmental friendly tranquilizer, which can be used for various fish species. A higher tolerance against longer exposure times gives a greater security and makes the application under practice condition much more easier. Because of the low dosage (25-50 ppm) there occures also no alteration of the taste of the fishes. Clove oil is more effective at reducing the short-term stress response induced by handling, and is recommended as an alternative fish anaesthetic. Available as pure oil in vials of 10 or 100 Milliliter.
DISINFECTANTS for Aquaculture
We supply various chemicals for desinfection in aquaculture and aquaria.
Some chemicals are in some countries only allowed for fish which are not used for human
consumption, like eggs, spawners or ornamental fish.
The following chemicals are available:
Malachite green against fungus diseases and Ichthyophthirius;
Chloramin T against gill diseases and Myxobacteria;
Copper sulfate against gill diseases and algae;
Actomar for desinfection of equipment, fish and eggs;
