BUDIDAYA PERIKANAN |
- Matters relating to the spawning fish
- EELS - Eerie Or Interesting ? Saltwater
- EELS - Eerie Or Interesting ? Saltwater
| Matters relating to the spawning fish Posted: 25 Apr 2010 06:24 AM PDT
Comparison of sexes in spawning fish of each species vary, but the comparison is generally close to each other. Many found that the fish spawn pelagophils are abuzz in a particular area. Spawning areas (Spawning ground) North Sea herring in the southern part of the proposed Cushing (1968) in length between 2-3 km and width of 500 m. These fish spawn every year in the same area and also regular time. In Indonesia, the region economically important marine fish spawning much remains unknown. For example the location of spawning areas lemuru still unknown. Fish larvae have been found further rise in the first time appeared not far from Banyuwangi. Each year the emergence of juveniles were in the same area. Huge lemuru likely spawning areas not far from where the children fish at first appear. Direction and velocity of flow and age of juveniles first appeared it plays a role in determining the location of spawning areas in the surface region. Similarly, fish spawning areas is unknown. But the enormous possibilities that the spawning area was several hundred feet below the water surface. Spawning period of each species of fish vary. There are spawning that took place in a short time (total spawner = isochronal), but many also in a long time. Spawning in part for some (partial spawner = heterochronal) in fish may take up to several days. In such case, the female fish usually remain in spawning areas during the spawning process is not finished. When spawning is completed, the male fish that live in the area longer than in female fish. Which could be a stimulant for fish spawning lithophils, psamophils and phythophils, besides the existence of spawning substrates such as stone, sand and plants also increase or decrease water temperature and the arrival, just become a natural stimulant for fish when the fish spawn sudah_siap. Among the biological factors that play a role in spawning the organs for sight, hearing, smell and linea lateralis and the gland is clogged. Hubbs and Martin (1965) suggested that the darter fish (Etheostema lepidum) can be spawned at night and by day. Spawning is done at the time of the day occurred on the same fish (homospesifik), whereas spawning occurs at night can occur with different species (heterospesifik) so that it can cause the occurrence of a hybrid. In the blind group spawning fish can be proceeded in a usual because with the help of the organ of smell and linea lateralis. Votes issued at the time of spawning fish in addition to calling form the opposite sex is also a stimulant to spawn. Source: M. IchsanEffendie, 1997 budidaya ikan  |
| EELS - Eerie Or Interesting ? Saltwater Posted: 25 Apr 2010 01:45 AM PDT
by: Alex Royal Next to sharks, eels have to be the most feared and misunderstood fish. Eels invoke thoughts of terror and wanton destruction. This may be because eels are similar to snakes, which also get little love and sympathy. Or perhaps this is another result of Hollywood's simplistic portrayal of this fascinating group of animals. In either case, the fear is unwarranted and one can successfully and safely keep eels in a home aquarium with a little planning and research. While many people associate eels with saltwater aquariums, there are also freshwater eels, which means customers on both sides of the hobby can enjoy owning an eel. Saltwater Eels Eels for saltwater aquarium come from three families Ophichthidae (worm and snake eels), Heterocongridae (garden and conger eels) and Muraenidae (moray eels). Even though these eels come from different families, they share similarities. Some of these common traits are size, diet and behavior. Most eels are obtained when small but will quickly reach a size of 24 to 36 inches in an aquarium. They are all carnivores and need a variety of meat in their diet. The majority want to hide in rock and caves, so the aquarium must be decorated accordingly. Last but not least, they are all excellent escape artists. Together these basic traits mean that one should only put an eel in a large aquarium (50 gallons or more) that has a good filtration system because these fish need a lot more food than more common, smaller marine fish. Their foods are also higher in protein than flake feed which means there will be more ammonia production, leading to nitrate buildup in the aquarium. Regular water changes are a must with these fish. Water quality for saltwater eels is the same for all marine fish, as the ocean's basic water parameters, except temperature, are the same worldwide. These eels are all tropical and need a water temperature in the mid 70s. Behavior differs among eels even in the same family. A popular eel is the zebra moray eel (Gymnomuraena zebra). The body of this eel is dark brown with white stripes running vertically down the body the entire length of the fish. They grow over 4 feet long, but are peaceful and will not bother tank mates. They are good for community marine aquariums but not reef compatible because they will knock corals over. This eels needs a large tank. It eats chopped fish, squid, mussels, clams and more. Another popular moray eel is the snowflake eel (Echidna nebulosa). This eel also gets its popular name from the body coloration, which features white spots or splashes on a dark back-ground. The snowflake eel does not get as big as the zebra moray, but reaches about 2 feet in the aquarium, and it is easier to maintain. But it is a little more aggressive than the zebra, and it seems to spend its entire life trying to figure out how to escape from the aquarium. This eel will eat fish and crustaceans smaller than itself, so the selection of potential tank mates is narrowed compare to the zebra. They need rocks and caves and may only come out at night. There are smaller eels that can be kept in the aquarium and as a colony such as Hass' garden eel (Taenioconger hassi). These eels bury themselves in the sand, and if several are kept in the large tank, they will space their homes in the sand and all rise out of the holes looking like plant stems in the garden. These eels are difficult to keep, you should have the experience and patience needed to be successful with these species. Eels add a whole new dimension to an aquarium and are worth a try. With a little planning, you can be successful and enjoy these fish. We hope that this guide was of help to you and your hobby. THANK YOU... About The Author Alex has been involved in the pet industry for over 20 years. Starting in a partnership of a full line pet store, until he opened his own store and expended it to 3 locations. His involvement and sponsorship of various pet clubs as well as donations to a variety of rescue organizations, has helped a number of pets and their owners to enjoy a long lasting relationship. As the result, his extensive experience and knowledge of animals and pet supplies is shared through these articles. The author invites you to visit: http://www.e-petsbyroyal.com Article Source: http://www.articlecity.com/articles/pets_and_animals/article_2341.shtml budidaya ikan  |
| EELS - Eerie Or Interesting ? Saltwater Posted: 25 Apr 2010 01:44 AM PDT
by: Alex Royal Next to sharks, eels have to be the most feared and misunderstood fish. Eels invoke thoughts of terror and wanton destruction. This may be because eels are similar to snakes, which also get little love and sympathy. Or perhaps this is another result of Hollywood's simplistic portrayal of this fascinating group of animals. In either case, the fear is unwarranted and one can successfully and safely keep eels in a home aquarium with a little planning and research. While many people associate eels with saltwater aquariums, there are also freshwater eels, which means customers on both sides of the hobby can enjoy owning an eel. Saltwater Eels Eels for saltwater aquarium come from three families Ophichthidae (worm and snake eels), Heterocongridae (garden and conger eels) and Muraenidae (moray eels). Even though these eels come from different families, they share similarities. Some of these common traits are size, diet and behavior. Most eels are obtained when small but will quickly reach a size of 24 to 36 inches in an aquarium. They are all carnivores and need a variety of meat in their diet. The majority want to hide in rock and caves, so the aquarium must be decorated accordingly. Last but not least, they are all excellent escape artists. Together these basic traits mean that one should only put an eel in a large aquarium (50 gallons or more) that has a good filtration system because these fish need a lot more food than more common, smaller marine fish. Their foods are also higher in protein than flake feed which means there will be more ammonia production, leading to nitrate buildup in the aquarium. Regular water changes are a must with these fish. Water quality for saltwater eels is the same for all marine fish, as the ocean's basic water parameters, except temperature, are the same worldwide. These eels are all tropical and need a water temperature in the mid 70s. Behavior differs among eels even in the same family. A popular eel is the zebra moray eel (Gymnomuraena zebra). The body of this eel is dark brown with white stripes running vertically down the body the entire length of the fish. They grow over 4 feet long, but are peaceful and will not bother tank mates. They are good for community marine aquariums but not reef compatible because they will knock corals over. This eels needs a large tank. It eats chopped fish, squid, mussels, clams and more. Another popular moray eel is the snowflake eel (Echidna nebulosa). This eel also gets its popular name from the body coloration, which features white spots or splashes on a dark back-ground. The snowflake eel does not get as big as the zebra moray, but reaches about 2 feet in the aquarium, and it is easier to maintain. But it is a little more aggressive than the zebra, and it seems to spend its entire life trying to figure out how to escape from the aquarium. This eel will eat fish and crustaceans smaller than itself, so the selection of potential tank mates is narrowed compare to the zebra. They need rocks and caves and may only come out at night. There are smaller eels that can be kept in the aquarium and as a colony such as Hass' garden eel (Taenioconger hassi). These eels bury themselves in the sand, and if several are kept in the large tank, they will space their homes in the sand and all rise out of the holes looking like plant stems in the garden. These eels are difficult to keep, you should have the experience and patience needed to be successful with these species. Eels add a whole new dimension to an aquarium and are worth a try. With a little planning, you can be successful and enjoy these fish. We hope that this guide was of help to you and your hobby. THANK YOU... About The Author Alex has been involved in the pet industry for over 20 years. Starting in a partnership of a full line pet store, until he opened his own store and expended it to 3 locations. His involvement and sponsorship of various pet clubs as well as donations to a variety of rescue organizations, has helped a number of pets and their owners to enjoy a long lasting relationship. As the result, his extensive experience and knowledge of animals and pet supplies is shared through these articles. The author invites you to visit: http://www.e-petsbyroyal.com Article Source: http://www.articlecity.com/articles/pets_and_animals/article_2341.shtml budidaya ikan  |
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