Ekologi Makan Ikan Glyptothorax Major (Blgr) (Bagaridae, Siluriformes) Di Sungai Alas, Aceh Tenggara

IKE RACHMATIKA & SOETIKNO WIRJOATMODJO.1988.Feeding ecology of Glyptothorax major Blgr) (Bagaridae, Silurifoimes) in the Ala River,South East Aceh. Berita Biologi. 3(8): 396 399.A study on the feeding ecology of Glyptothorax major (Blgr) was conducted in the Alas River South East Aceh, Sumatra during early dry season, January 1983.Index of Preponderance analysis showed that this species is a benthic-insect feeder It was found that the food habit of immature and mature fish is slightly different.The mature fish\u27s food habit is more varied than the immature\u27s. Based on the concept of the "availability factor"of prey species,a tendency was also found that the mature fish is a more opportunistic of using food resources than the immature\u27s.The supposed mechanisme of this difference and its relation with condition factor values is discussed

Komunitas Serangga Air Di Sungai Hutan Ketambe, Taman Nasional Gunung Leuser, Aceh.

S. WIRJOATMODJO & ANITA HANNA ATMOWIDJOJO. 1985. Insect community of stream ecosystem of Ketambe forest, Gunung Leuser National Park, Aceh, Berita Biologi 3.(3) : 111 -115.Non-strictly seasonal study on the insect community of stream ecosystem at Ketambe forest, Gunung Leuser National Park,Aceh was undertaken from September 1980 to February 1983,with the aim of providing base line data of the local stream ecosystem. Thirty two species of benthic insects were recorded from the depth between 5--30 cm.They belong to the orders of Diptera, Odonata, Kphemeroptera, Coleoptera, Plecoptera, Hemiptera, Megaloptera and Trichoptera. The number of species found was higher during the beginning of the dry than that of the rainy season (96,9% vs 59,4% of the total). Diptera and Odonata showed the highest number of species (8) among the orders, whereas Trichoptera was the lowest (one species). However, in term of frequency of occurence and abundance, the Trichoptera species, Hydropsyche sp,, was the highest, followed by Neoperla sp. (Flecoptera). There was a tendency of seasonal fluctuation in species number and life cycle in several species. Bottom structures containing pebbles, boulders of various sizes and leaf litter for shelter and feeding site, appeared to be the best habitat. Species composition or number varied with stations. However, diversity indexes among stations were more or less similar, and all of them were low

KOMUNITAS SERANGGA AIR DI SUNGAI HUTAN KETAMBE, TAMAN NASIONAL GUNUNG LEUSER, ACEH.

S. WIRJOATMODJO & ANITA HANNA ATMOWIDJOJO. 1985. Insect community of stream ecosystem of Ketambe forest, Gunung Leuser National Park, Aceh, Berita Biologi 3.(3) : 111 -115.Non-strictly seasonal study on the insect community of stream ecosystem at Ketambe forest, Gunung Leuser National Park,Aceh was undertaken from September 1980 to February 1983,with the aim of providing base line data of the local stream ecosystem. Thirty two species of benthic insects were recorded from the depth between 5--30 cm.They belong to the orders of Diptera, Odonata, Kphemeroptera, Coleoptera, Plecoptera, Hemiptera, Megaloptera and Trichoptera. The number of species found was higher during the beginning of the dry than that of the rainy season (96,9% vs 59,4% of the total). Diptera and Odonata showed the highest number of species (8) among the orders, whereas Trichoptera was the lowest (one species). However, in term of frequency of occurence and abundance, the Trichoptera species, Hydropsyche sp,, was the highest, followed by Neoperla sp. (Flecoptera). There was a tendency of seasonal fluctuation in species number and life cycle in several species. Bottom structures containing pebbles, boulders of various sizes and leaf litter for shelter and feeding site, appeared to be the best habitat. Species composition or number varied with stations. However, diversity indexes among stations were more or less similar, and all of them were low

Observation on Waterbirds in Indramayu-Cirebon Coastal Area, West Java

A waterbird observation was conducted in October and November 1990 along the northern coast of West Java from lndramayu to Cirebon. During the study 27 waterbird species of 10 families were recorded. They inhabited two different types of habitats, i.e., pond and mudflat habitats, where several kinds of food resources can be found in large numbers, especially species feed on insects and other benthic invertebrate. More attention are needed for two species i.e., Oriental Pralincole and Milky Stork. The Oriental Pratincole, Glnrroln maldiwarum, is a good insect predator in the paddy field, but its population is threatened due to overcaptured by local people for food. Glareoln mcrldi~~nrumis the most abundant species while Ixohrychus cint~nmomeusa ndAmnurornisphocnicurus are the rarest

Growth food and movement of flounder, Platichthys flesus (L.)

SIGLEAvailable from British Library Document Supply Centre- DSC:D33575/81 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Kajian Aspek Reproduksi Ikan Endemik Bonti-bonti (Paratherina Striata) Di Danau Towuti, Sulawesi Selatau

Study of Reproduction Aspects of Endemic Fish Bonti-bonti (Paratherina striata)in Lake Towuti, South Sulawesi. Bonti-bonti, is one of endemic fishes in Lake Towuti andLake Mahalona. Bonti-bonti has been utilized by people around the lake for consumption inthe form of 6esh fish, dry fish, and salty fish; as ornamental fish; and as raw material foranimal feed. It should be protected from decreasing of fish population due to increasingexploitation and habitat quality changes. The objective of this research is to know thereproduction aspects of this endemic fish, as basic data for conservation. This research wasconducted in Lake Towuti, South Sulawesi from May 2006 to April 2007 at five stations.Samples were collected using experimental gillnet sized 0.625, 0.75, 1.0, and 1.25 inches.The result shows that testis and ovary was found each in one organ during a period of gonadadevelopment. Gonada maturity, was observed histologically oscured at five maturity stages.The range of egg diameters were from 0.01 to 1.50 mm. The fust gonada maturity period ofmale and female fish were reached at 5.53 and 6.26 cm of total length, respectively. Male andfemale fish gonada maturity (50%) were at 16.78 and 14.61 cm total length, respectively.Gonada maturity index value of male and female were 0.01-3.96% and 0.02-6.77%. Thereproduction ability is related to fecundity which have an effect on number ofjuveniles. Therange of fish fecundity were 818-6,051, which were devided kom female with 11.30-18.33cm total length. Bonti-bonti fish is partial spawner type