Bisnis Dari Hobby anda

Fish in culture

2007-04-15T18:10:00.000-07:00

Through the ages, many cultures have featured fish in their legends and myths,

from the "great fish" that swallowed Jonah the Prophet through to the half-human, half-fish mermaid around which books and movies have been centred (e.g., Splash). Among the deities said to take the form of a fish are Ika-Roa of the Polynesians, Dagon of various ancient Semitic peoples, and Matsya of the Dravidas of India. The astrological symbol Pisces is based on a constellation of the same name, but there is also a second fish constellation in the night sky, Piscis Austrinus. Fish have been used figuratively in many different ways, for example the ichthys used by early Christians to identify themselves through to the fish as a symbol of fertility among Bengalis.[38] Fish have also featured prominently in art and literature, as in movies such as Finding Nemo and books such as The Old Man and the Sea. Large fish, particularly sharks, have frequently been the subject of horror movies and thrillers, most notably the novel Jaws, which spawned a series of films of the same name that in turn inspired similar films or parodies such as Shark Tale, Snakehead Terror, and Piranha.

Exotic species

2007-04-15T18:08:00.000-07:00

Introduction of exotic species has occurred in a variety

of places and for many different reasons. One of the nest studied (and most severe) examples was the introduction of Nile perch into Lake Victoria. Since the 1960s the Nile perch gradually exterminated the 500 species of cichlid fishes found only in this lake and nowhere else. Some species survive now only in captive breeding programmes, but others are probably extinct.[37] Carp, tilapia, European perch, brown trout, rainbow trout, and sea lampreys are other examples of fish that have caused problems by being introduced into alien environments.

Find a Fish

2007-02-24T17:15:00.000-08:00

Australian Handfish Brachionichthys sp

The Australian Handfish has a small mouth and gill openings that are restricted to a tubular pore behind the pectoral fins. It has prominent hand-like pectoral fins and jugular (glossary) pelvic fins.

The dorsal fin is divided into three parts; an illicium (glossary) on the snout, a tall sail-like spinous fin on top of the head, and a long-based soft-rayed dorsal fin along the back.

The Australian Handfish is pale with yellow to brown dashes. Most fins are clear with black spots.

This species grows to 8cm in length.

It is endemic to (only known from) Australia, occurring in marine waters from southern Queensland to South Australia. It is usually seen in the catches of trawls taken at depths between 40m and 100m.

Ekologi ikan

2007-02-24T16:50:00.000-08:00

Ikan dapat ditemukan di hampir semua "genangan" air yang berukuran besar baik air tawar, air payau maupun air asin pada kedalaman bervariasi, dari dekat permukaan hingga beberapa ribu meter di bawah permukaan. Namun, danau yang terlalu asin seperti Great Salt Lake tidak bisa menghidupi ikan. Ada beberapa spesies ikan dibudidayakan untuk dipelihara untuk dipamerkan dalam akuarium.

Ikan adalah sumber makanan yang penting. Hewan air lain, seperti moluska dan krustasea memancing. Hasil penangkapan ikan dunia setiap tahunnya berjumlah sekitar 100 juta ton. kadang dianggap pula sebagai ikan ketika digunakan sebagai sumber makanan. Menangkap ikan untuk keperluan makan dalam jumlah kecil atau olah raga sering disebut sebagai

Overfishing adalah sebuah istilah dalam bahasa Inggris untuk menjelaskan penangkapan ikan secara berlebihan. Fenomena ini merupakan ancaman bagi berbagai spesies ikan. Pada tanggal 15 Mei 2003, jurnal Nature melaporkan bahwa semua spesies ikan laut yang berukuran besar telah ditangkap berlebihan secara sistematis hingga jumlahnya kurang dari 10% jumlah yang ada pada tahun 1950. Penulis artikel pada jurnal tersebut menyarankan pengurangan penangkapan ikan secara drastis dan reservasi habitat laut di seluruh dunia.

Fish

2007-02-24T16:40:00.000-08:00

Fish are aquatic vertebrates that are typically cold-blooded; covered with scales, and equipped with two sets of paired fins and several unpaired fins. Fish are abundant in the sea and in fresh water, with species being known from mountain streams (e.g., char and gudgeon) as well as in the deepest depths of the ocean (e.g., gulpers and anglerfish). They are of tremendous importance as food for people around the world, either collected from the wild (see fishing) or farmed in much the same way as cattle or chickens (see aquaculture). Fish are also exploited for recreation, through angling and fishkeeping, and fish are commonly exhibited in public aquaria. Fish have an important role in many cultures through the ages, ranging as wide as deities and religious symbols to subjects of books and popular movies.