The first time I saw the Ashizuri Kaiteikan submarine tower was last year when my family took a 3-hour trip down the coast to enjoy the beautiful weather. We drove through Nakamura and the Hata district and enjoyed looking at the streets and buildings which were old and in the Showa* style. Continue reading A place for memories: the Ashizuri Kaiteikan submarine tower
By R. Fujimoto
In the Pacific Ocean which spreads off Kochi, there is the grand Balaenoptera brydei. In Kochi prefecture famous for whale watching a whale is sightseeing material. While there are several kinds of whales, Balaenoptera brydei is a kind currently liked by many tourists.This Balaenoptera brydei is introduced this time.
Description & Taxonomy
It is distinguished in outside because mustached hair is baleen is short and that apply near a nostril from rostrum edge and the right-and-left both sides of the upper surface of a snout have an upheaval line of one articles each although it is close species of a sei whale, that a trough is long and the tip has reached the navel, wide, and thick.
The length is also slightly smaller than a sei whale, and is only a maximum of 15.5 meters.
Although Balaenoptera brydei was presupposed that only the South Africa coast is inhabited once, it was discovered around the postwar years and Ogasawara Islands, and it became clear that it was also widely distributed over the North Pacific.
We decided that the International Whaling Commission will correct the appended chart of Convention for the Regulation of Whaling in 1970, and it treats this kind and a sei whale as another kind. The small fish which this kind uses as the staple food is the food of large-sized wide-ranging fish, such as a bonito, and a possibility that the group of large-sized wide-ranging fish is in the ocean space in which this kind is present also becomes high.
Moreover, there is a merit which protects itself from swordfish by being attached to a whale in a bonito, and katsuokujira of this kind or a close relationship forms one small ecosystem by one individual.
Use & Conservation
Balaenoptera brydei becomes known as the subject of whale watching, and is loved, and the whale is enjoyed as what is not eaten and is seen now when control of whaling is severe.
In the Fisheries Agency version Red Data Book, it is regarded as the rare animal and has become a candidate for preservation.
A common Hammerhead shark is living the coast of the warm seas of the world. And they are living the sea of Kochi. I touched Hammerhead shark with a neighboring fishmonger for the first time in the days of a high school. I was fascinated what attractive. Hammerhead shark is called “Shumokuzame” from the form of the head such as wooden bell hammer ringing Japanese musical instruments in Japan, and in English, the form of the head is likened with a hammer and it is called “Hammerhead shark”.
Description & Taxonomy
Hammerhead shark is a generic name of a shark belonging to order Carcharhiniformes family Sphyrnidae. Nine kinds are known all over the world. Full length is 5 meters, and the big thing becomes 6 meters. Since the head spread horizontally like a hammer and it is sticking out, Hammerhead shark can be recognized immediately. The body back is gray and brown, yellowish-brown, and the ventral is white, there are not the fleck outstanding in particular.
Range & Ecology
Hammerhead shark lives the sea to 100 meters of depth of the water and sometimes sink to 300 meters of depth of the water. They live the offing mainly, but live the coast, a reef, and the estuary. They chase food and may come near a shore. Since eyes stick the both ends of the head, they have a view larger than other sharks, and food can be looked for easily. Hammerhead shark is a strong predator, and they feed not only fish and a cuttlefish and an octopus and Crustacea but also other sharks and prey on one another. Their favorite food is Dasyatis akajei, and they eat to the sting of a caudal fin. They move to high latitude sea area in summer, and come back to the tropical zone when it is winter. Although the life is unknown, probably about 30 years are presumed. Hammerhead shark forms a group uniquely as a shark, and acts. Occasionally the number may amount to hundreds of them.
Use & Conservation
Hammerhead shark is processed into the dried fish called “Maira” and “Tetsuboshi” in Kochi. It matches rice well. The things which is the most terrible for Hammerhead shark is fishery and indiscriminate hunting. It is said that the shark killed by human being becomes from 50 million to 100 million of them a year. In this situation the sharks become extinct. The important thing is Hammerhead shark is only one animal alike other animals, and everyone understands that they are by no means atrocious killer. Hammerhead shark is kept in many aquariums, and their mysterious shape attracts the eyes of many people. And it’s may appeal for the need of the conservation of the shark.
If you want to meet Hammerhead shark in Kochi, let’s go to Niyodogawa after the heavy rain. They come to the mouth of a river of Niyodogawa after the heavy rain. Hammerhead shark is one of a few sharks attacking the human being, but is not ferocious as a rumor because they becomes rarely aggressive. If you come across Hammerhead shark in the sea, please read the action exactly calmly. The probability attacked by a shark is hard to happen than being struck by lightning than being stung by the hornet.
by T. Oda
Class fiddler crab has 10 Japanese types. Fiddler crab and hakusen fiddler crab are distributed in Kyusyu and Western. Nansei island and ogasawara island have many types.
Description, Taxonomy, Range, Ecology & Whatnot
F1ddler crab fiddle Gap length is 20mm,gap width is 35mm.Typically,from the left and right eye is the center. Shell in an inverted trapezoid. The body color is red but sometimes difficult to determine in the mud what the colors are easily.
They live in tidal flats and mud hardened area. However,human activity became a major threat, and has reduced the habitat.Invertebrate Red List published by the Ministry in 2000,had been semi-endangered species,and were unique and endangered in 2006 due to revision of the increased risk of extinction.The breeding season is mid-August from mid-June.During this time,females lay eggs twice.Fiddler’s food is plankton and tiny creatures in the sand.
Hakusen fiddler crab fiddlers fiddling Gap width is 18mm. It inhabits sandy beach near the mouth of mud mixed.Ministry of the environment is Red List has been revised to class Ⅱ as near threatened and endangered fiddler crab,at the beginning of the 21st century,more than the fiddler crab habitat.The food is similar to hakusen crab.
Factors threatening its survival,the development of the rivers,wetlands development,coastal development,water pollution,and limit origin.