뉴질랜드 한치 연구좀 해봤습니다... 서해에서도 잡힐까 궁금해서 시작한 연구
뉴질랜드 한치가 영문으로는 BigFin Reef Squid이며 Bigfin squid 랑은 다른 종류라 합니다..
정식 학명은 Sepioteuthis lessoniana이라 하는데 일딴 우리가 궁금한건 이게 아니니 Skip
It is often difficult to superficially distinguish between male and female bigfin reef squids. Some authors say that females are generally smaller than males, 일딴 암컷한치가 더 클줄 알았는데..
The bigfin reef squid is a neritic warm water-dwelling squid. They are usually found 0 to 100 m (0 to 328 ft) below the water's surface. They tend to remain close to the shoreline, near rocks and reefs. They are slightly more active during the night and will move to deeper waters or find cover in daytime. Large numbers of juveniles can often be found hiding beneath floating driftwood 이부분이 우리들한테는 상당히 중요할거같은데 신기한게도 한치 에깅을 하다보면 밤보다 낮에 더 잘잡히는 경우를 자주 경험할때가 만아서 참 헛갈립니다
어디서 잡을수 있나 찾아봤는데
아직 시도는 안해봤지만 혹시 서해에서 한치 잡아보신적 있으신분 계십니까? 지도상에는 북섬 전지역에 분포해있는걸로
Bigfin reef squids are also known as northern calamary in Australia and New Zealand, to distinguish them from the southern reef squid (or southern calamary), Sepioteuthis australis. Other common names include green-eyed squid in English; koonthal in Malayalam; oosi kanava in Tamil; calmar tonnelet in French; calamar manopla in Spanish; Großflossen-Riffkalmar in German; mu he`e in Hawaiian; 莱氏拟乌贼 in Chinese;torak in Malaysian; アオリイカ (aori-ika) in Japanese; kinn mon in Burmese; and 무늬오징어 (munuiojing-eo), 흰꼴뚜기 (huinkkolttugi), or 미즈이카 (mizuika) in Korean.
뉴질 한치가 한국에선 무늬오징어가 맞는거 같습니다..
궁금하신분 있으실까바 무늬 오징어 라이프 사이클도 올려드릴게요 참고해보세요
The main spawning season for bigfin reef squids usually begins in May, but they lay eggs all year round and spawning seasons can vary by location. A single female can spawn more than once in her lifetime.Females can release 20 to 1180 eggs per individual and will die soon afterwards.
The females spawn by passing eggs from their oviducts. These eggs are then coated in gelatinous substances from the nidamental glands and oviducal glands, forming an egg 'capsule'. The egg capsules of the bigfin reef squids contain two to nine eggs each. These are laid in single straight strands on rocks, corals, aquatic plants, submerged branches and other surfaces. At this point, the eggs are 3 mm (0.12 in) in diameter and the egg capsules about 58.2 mm (2.29 in) in length and 12.6 mm (0.50 in) in width, on average.
The capsules incubate for about 3 weeks, depending on temperature. In warmer Indonesia, the incubation period was recorded to be only 15 to 16 days, while in Thailand it takes around 20 to 22 days. They gradually enlarge by absorbing water, reaching around 82.4 mm (3.24 in) in length and 14.6 mm (0.57 in) in width. Unfertilised eggs remain milky white and do not develop further. Fertilised eggs undergo cell division reaching a diameter of 16 mm (0.63 in) with the developing embryo at 11 mm (0.43 in) on the day before hatching. Upon hatching, the paralarvae are 6 mm (0.24 in) in mantle length (excluding tentacles), with fully functioning fins and ink sacs. They resemble miniature adults and are already strong swimmers. They exhibit schooling behaviour two weeks after hatching.
Hatchlings are often cannibalistic. This is regarded as the main cause of death in young squids, particularly in dense populations. However, cannibalism usually happens only when eaten individuals were already weakened significantly or dead, so the actual cause of death may have been something else. Subadults are usually recognisable by their size, ranging from 20 to 60 mm (0.79 to 2.36 in) in length. They reach sexual maturity at less than 210 days in the wild. Males reach sexual maturity earlier than females. In captive populations, males mature 140 days after hatching at most. Females will begin spawning at around 156 to 196 days after hatching. Both males and females mature earlier in captivity than in the wild. Water temperature may play an important role in the earlier sexual maturation of captive specimens. High temperatures may induce shorter lifespans and smaller body sizes, while cooler temperatures favour longer lifespans and larger individuals.
Bigfin reef squids have one of the fastest recorded growth rates for any large marine invertebrate. They can reach 600 g (1.3 lb) in only four months. Nonetheless, size can not often be reliably correlated with age, as variations of body size within a generation is fairly common. In captivity, bigfin reef squids have a lifespan of 161 to 315 days for both sexes.