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MeetingSize distribution and sex ratio of scalloped hammerhead sharks(Sphyrna lewini) in Indian Ocean at southern part of Java and Nusa Tenggara, Indonesia 2013
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No results found.Hammerhead shark is one of the most common shark species in the tropics. The sharks were caught by longline and drift gill nets either bycatch or target catch. Research on the length frequency and sex ratio of scalloped hammerhead shark (Sphyr lewini) was conducted at two shark landing sites in the southern of Java in 2010, mely Oceanic Fishing Port of Cilacap and Fish Landing Site Tanjung Luar, East Lombok, West Nusa Tenggara. Data were collected from the surveyed areas including the length of frequency and the sex composition. The research objective was to obtain data and information for magement and conservation of scalloped hammerhead sharks. The results showed that the size distribution of scalloped hammerhead sharks females and males were between 51 cm to 300 cm TL and 127 cm to 244 cm TL, respectively. Sex ratio of male and female were unequal, where female caught more frequent than male. The catch during the study was domited by the immature fishes. This condition remind that s harks resources should be maged wisely for their sustaibility. -
MeetingPopulation structure and reproduction of bigeye tuna (Thunnus obesus) in Indian Ocean at western part of Sumatra and southern part of Java and Nusa Tenggara 2013
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No results found.This research was conducted to identify population structure and reproduction aspect of big eye tu (Thunnus obesus) in west off Sumatra and south off Java and Nusa Tenggara of Indian Ocean. The sample of fish was collected from catch landed by fishermen. The fish was caught from the Indian Ocean during 2010. Alysis of population structure was done by using of histology technique of fish genetic and reproduction. Result showed that population structure of the big eye tu in Indian Ocean consisted of two different sub populations mely sub population in west off Sumatra and another one is sub population in south of Java and Nusa Tenggara waters. The most of bigeye tu catch (about 39%) was categorized as immature fish with God Somatic Index stage I. The immature fish was mostly found in west off Sumatra waters. While the catch in south off Java and Nusa Tenggara waters was mostly categorized as mature fish. It was indicated that south off Java and Nusa Tenggara waters was as spawning ground of the big eye tu. -
MeetingSome Aspects of the Distribution and Biology of the Indo-Pacific Sailfish, Istiophorus platypterus (Shaw and Nodder, 1792), in Indian Waters. 1995
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