PERIKANAN TANGKAP DI DANAU MATANO, MAHALONA, DAN TOWUTI, SULAWESI SELATAN

Suatu penelitian untuk mengetahui aspek perikanan tangkap di Danau Matano, Mahalona, dan Towuti telah dilakukan dari bulan Mei Desember 2005. Danau Matano, Mahalona, dan Towuti merupakan contoh dari ekosistem danau tektonik yang menampung jenis ikan endemik dan juga jenis ikan introduksi (tilapia dan ikan mas, Cyprinus carpio). Penelitian ini dilakukan dengan metode survei dengan cara mencari lokasi-lokasi ada aktivitas penangkapan ikan, wawancara dengan nelayan, dan bekerjasama dengan enumerator dalam mengumpulkan data penelitian. Hasil penelitian telah mendapatkan 22 jenis ikan endemik dan 6 jenis ikan introduksi yang tertangkap di ketiga danau (Matano, Mahalona, dan Towuti). Danau Matano tertangkap 7 jenis ikan endemik, Mahalona 8 jenis, dan Danau Towuti tertangkap 15 jenis. Jaring dan bagan merupakan alat tangkap yang dominan digunakan oleh nelayan untuk menangkap ikan endemik seperti ikan buttini (Glossogobius sp.) dan pangkilan (Telmatherina sp. dan Paratherina sp.). Hasil tangkapan ikan di Danau Towuti 5,7 kg per ha per tahun, Danau Mahalona 1,8 kg per ha per tahun, dan Danau Matano 1,2 kg per ha per tahun. Untuk melestarikan ikan-ikan endemik perlu ada pengelolaan dan pengaturan waktu dan lokasi penangkapan yang baik. A research in order to identify the capture fishery at Lakes: Matano, Mahalona, and Towuti was conducted from May to December 2005. Lakes Matano, Mahalona, and Towuti are examples of the representative tectonic lake ecosystems housing the endemic and some exotics (tilapia and carp, Cyprinus carpio) fish species. The survey methods were used in this reseacrh by hunting the location of fishing activities, interview with fishermen and partnership with enumerator in collecting research data. Results of the research show that 23 endemic fish species and 6 introduced per exotic fish species were caught in three research lakes. From 22 endemic fishes, 7 fish species were caught at Lake Matano, 8 fish species at Lake Mahalona, and 15 fish species were caught at Lake Towuti respectively. Gillnets and bagan were dominant fishing gears to catch the endemic fishes such as buttini (Glossogobius sp.) and pangkilan (Telmatherina sp. and Paratherina sp.). The productivity of the fisheries were 5.7 kg per ha per year for Lake Towuti, 1.8 kg per ha per year (Lake Mahalona), and 1.2 kg per ha per year (Lake Matano) respectively. To sustain endemic fishes is needed a better management eg. domesticating and regulating time and location of capture endemic fish species.

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Modelling critical factors affecting the distribution of the vulnerable endemic Eastern Iberian barbel (Luciobarbus guiraonis) in Mediterranean rivers

Mediterranean Marine Science ◽

10.12681/mms.1351 ◽

2015 ◽

Vol 17 (1) ◽

pp. 264 ◽

Cited By ~ 3

Author(s):

E. J. OLAYA-MARIN ◽

F. MARTÍNEZ-CAPEL ◽

R. GARCÍA-BARTUAL ◽

P. VEZZA

Keyword(s):

River Basin ◽

Fish Species ◽

Model Parameters ◽

Physical Habitat ◽

Mediterranean Rivers ◽

Exotic Fish ◽

Gradient Descent Algorithm ◽

River Basin District ◽

Endemic Fish ◽

Exotic Fish Species

Luciobarbus guiraonis (Eastern Iberian barbel) is an endemic fish species restricted to Spain, mainly distributed in the Júcar River Basin District. Its study is important because there is little knowledge about its biology and ecology. To improve the knowledge about the species distribution and habitat requirements, nonlinear modelling was carried out to predict the presence/absence and density of the Eastern Iberian barbel, based on 155 sampling sites distributed throughout the Júcar River Basin District (Eastern Iberian Peninsula). We used multilayer feed-forward artificial neural networks (ANN) to represent nonlinear relationships between L. guiraonis descriptors and variables regarding the physical habitat and biological components (macroinvertebrates, fish, riparian forest). The gradient descent algorithm was implemented to find the optimal model parameters; the importance of the ANN’s input variables was determined by the partial derivatives method. The predictive power of the model was evaluated with the Cohen’s kappa (k), the correctly classified instances (CCI), and the area under the curve (AUC) of the receiver operator characteristic (ROC) plots. The best model predicted presence/absence with a high performance (k= 0.66, CCI= 87% and AUC= 0.85); the prediction of density was moderate (CCI = 62%, AUC=0.71 and k= 0.43). The fundamental variables describing the presence/absence were; solar radiation (the highest contribution was observed between 2000 and 4200 WH/m2), drainage area (with the strongest influence between 3000 and 5.000 km2), and the proportion of exotic fish species (with relevant contribution between 50 and 100%). In the density model, the most important variables were the coefficient of variation of mean annual flows (relative importance of 50.5%) and the proportion of exotic fish species (24.4%). The models provide important information about the relation of L. guiraonis with biotic and abiotic variables, this new knowledge can help develop future studies and management plans for the conservation of this species in the Júcar River Basin District and, potentially, for the conservation of other endemic fish species of Barbus and Luciobarbus in Mediterranean rivers.

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Ichthyofauna of Endemic Fish in Towuti Lake, Luwu Timur Regency, South Sulawesi, Indonesia

Asian Journal of Fisheries and Aquatic Research ◽

10.9734/ajfar/2021/v12i330235 ◽

2021 ◽

pp. 20-30

Author(s):

. Jayadi ◽

Muhammad Natsir Nessa ◽

Andi Tamsil ◽

. Harlina ◽

. Ernaningsih ◽

...

Keyword(s):

Water Quality ◽

Fish Species ◽

Quality Parameters ◽

Descriptive Statistics ◽

Water Quality Parameters ◽

South Sulawesi ◽

Fish Samples ◽

Survival And Growth ◽

Endemic Fish ◽

Lake Towuti

Aims: The aims of this study to determine the biodiversity of endemic fish in Lake Towuti, Luwu Timur Regency South Sulawesi, Indonesia. Study Design: The research was conducted by survey Place and Duration of Study: The research was carried out in February until March 2021 in Tanjung Timbala; Tanjung Lengkobutanga; Tanjung Bakara; Tanjung Saone and. Tanjung Tominanga at Lake Towuti, Luwu Timur Regency South Sulawesi, Indonesia. Methodology: Fish samples were carried out every week using a trap net for 8 weeks. Fish samples obtained from each station were separated according to species. Fish samples were preserved with 4% formalin and then immersed in 70% alcohol before species identification was conducted. Data analysis in this research used descriptive statistics. Results: The endemic fish species was found is telamtherina bonti Telmatherina bonti, Telmatherina celebensis, Paratherina striata, Tominanga sanguicauda, Tominanga aurea Oryzias profundicola, Oryzias matanensis, Oryzias marmoratus, Mugilogobius hitam, Glossogobius flavipinnis, Glossogobius matanensis and Dermogenys megarhamphus. The percentage of endemic fish caught at each station on Lake Towuti was different. The water quality parameters obtained are as follows Temperature: 26.40⁰C-30.30⁰C, pH: 6.35-9.03, dissolved oxygen (DO):6.25-8.95 mg/L and NO3-N: 0.023-0.066 mg/L.This water quality were suitable for the survival and growth of endemic fish. Conclusion: Endemic fish families were obtained such as Telmatheridae, Adrianichthyidae, Gobiidae and Hemiramphidae and a total of twelve endemic fish species were found in this study. The number of endemic fish was found to be different at the station. Water quality parameters play an important role in the distribution and existence of endemic fish in Lake Towuti.

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Checklist of endemic (Adrianichthyidae, Gobiidae, Zenarchopteridae) and introduced fish in Lake Poso, Sulawesi, Indonesia

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/869/1/012060 ◽

2021 ◽

Vol 869 (1) ◽

pp. 012060

Author(s):

K P Bandjolu ◽

E Madiyono ◽

M Herjayanto ◽

A Gani ◽

M Nur ◽

...

Keyword(s):

Fish Species ◽

Ex Situ Conservation ◽

Ex Situ ◽

Introduced Fish ◽

Exotic Fish ◽

Anabas Testudineus ◽

Channa Striata ◽

Endemic Fish ◽

The Government ◽

High Diversity

Abstract Lake Poso is one of the ancient lakes in the world. This lake is known to have high diversity of endemic fish. Several exotic fish species have been introduced to increase the fisheries production in the lake. However, it is reported that the introduced fish is one of the causes of the threat of the existence of endemic fish in this lake. This study aimed to obtain the latest information on endemic (Adrianichthyidae, Gobiidae, and Zenarchopteridae), and introduced fish in Lake Poso. The research was carried out from May to July 2019 at 17 stations on the coast and rivers of Lake Poso. Fish were collected using a seine net, tray net, and hook and line. The results showed that there were 13 species of fish belonging to eight families and 11 genera. A total of six endemic fish species were still found in this study, namely Adrianichthys oophorus, Oryzias nebulosus, O. nigrimas, O. orthognathus, Mugilogobius sarasinorum, and Nomorhamphus celebensis. Seven species of introduced fish were found, namely Anabas testudineus, Aplocheilus panchax, Channa striata, flowerhorn (Cichlasoma sp.), Melanocromis auratus, Oreochromis niloticus, and Trichopodus trichopterus. Cichlids (flowerhorn, M. auratus, and O. niloticus) have the potential to be invasive due to their adaptability and ease of reproduction in Lake Poso. Conservation of the fish endemic to Lake Poso must be a serious concern for the government, academics, and the community. Ex-situ conservation can be a strategy to conserve the endemic fish of Lake Poso through controlled captivity.

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STUDY OF GROSS AND HISTOPATHOLOGICAL CHANGES IN CYPRINUS CARPIO FISH INFECTED WITH NON-HEMOLYTIC STREPTOCOCCUS PART 2: HISTOPATHOLOGY

Basrah Journal of veterinary Research ◽

10.33762/bvetr.2007.56604 ◽

2007 ◽

Vol 6 (2) ◽

pp. 111-126

Author(s):

Asaad M.R. AL-Taee ◽

Faiha S. Khadban ◽

Ali A-A. AL-Mayah

Keyword(s):

Cyprinus Carpio ◽

Histopathological Changes ◽

Hemolytic Streptococcus ◽

Cyprinus Carpio Fish

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Exotic fish species inhabiting in freshwater sources within the province of Samsun

Journal of FisheriesSciences com ◽

10.3153/jfscom.2007017 ◽

2007 ◽

pp. 139-151 ◽

Cited By ~ 5

Author(s):

Selma Ugurlu

Keyword(s):

Fish Species ◽

Exotic Fish ◽

Exotic Fish Species

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Length-weight relationships for five endemic fish species in the upper Yangtze River basin, China

Journal of Applied Ichthyology ◽

10.1111/jai.12824 ◽

2015 ◽

Vol 31 (5) ◽

pp. 961-962

Author(s):

L. Li ◽

H. Du ◽

L. Ren ◽

J.M. Wu ◽

Q.W. Wei

Keyword(s):

River Basin ◽

Fish Species ◽

Yangtze River ◽

Yangtze River Basin ◽

Upper Yangtze River ◽

Endemic Fish ◽

The Upper Yangtze River

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Effect of the Human Utilization of Northern Snakehead (Channa argus Cantor, 1842) on the Settlement of Exotic Fish and Cladoceran Community Structure

Sustainability ◽

10.3390/su13052486 ◽

2021 ◽

Vol 13 (5) ◽

pp. 2486

Author(s):

Jong-Yun Choi ◽

Seong-Ki Kim

Keyword(s):

Community Structure ◽

Fish Species ◽

Micropterus Salmoides ◽

Lepomis Macrochirus ◽

Nakdong River ◽

Exotic Fish ◽

Carnivorous Fish ◽

Channa Argus ◽

The Nakdong River ◽

Exotic Fish Species

Empirical studies suggest that changes in the density of top predators, such as carnivorous fish, in freshwater food webs, strongly affect not only fish communities but also various primary and secondary consumers. Based on these findings, we explored how differences in the utilization of carnivorous fish (i.e., Northern Snakehead, Channa argus) by humans affected the fish and cladoceran community structure as well as the settlement of exotic fish species (i.e., Lepomis macrochirus and Micropterus salmoides) in 30 wetlands located in the upper and lower reaches of the Nakdong River. Our results show that in the mid–lower reaches of the Nakdong River, the density of C. argus was low, while high densities of L. macrochirus and M. salmoides were observed. Exotic fish species are frequently consumed by C. argus, leading to a low density of L. macrochirus and M. salmoides in the upper reaches, which supported a high density of C. argus. However, in the mid–lower reaches, the density of L. macrochirus was high because of the frequent collection of C. argus by fishing activities. The dominance of L. macrochirus significantly changed the structure of cladoceran communities. L. macrochirus mainly feeds on pelagic species, increasing the density of epiphytic species in the mid–lower reaches. The continued utilization of C. argus by humans induced a stable settlement of exotic fish species and strongly affected the community structures of primary consumers in the 30 wetlands. The frequency of C. argus collection has to be reduced to secure biodiversity in the mid–lower reaches of the Nakdong River, which will reduce the proportion of exotic fish species and increase the conservation of native fish.

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Trophic ecology of Lontra longicaudis (Carnivora, Mustelidae) in lotic and semilotic environments in southeastern Brazil

Iheringia Série Zoologia ◽

10.1590/s0073-47212012005000004 ◽

2012 ◽

Vol 102 (3) ◽

pp. 261-268 ◽

Cited By ~ 2

Author(s):

Lívia B. Santos ◽

Nelio R. dos Reis ◽

Mário L. Orsi

Keyword(s):

Fish Species ◽

Food Habits ◽

Trophic Ecology ◽

Hydroelectric Power Plant ◽

Southeastern Brazil ◽

Aquatic Animal ◽

Hydroelectric Power ◽

Exotic Fish ◽

Lotic Environment ◽

Lontra Longicaudis

Lontra longicaudis (Olfers, 1818) (Carnivora, Mustelidae) is a semi-aquatic animal spread through the Central and South America, except in Chile. The implantation of a hydroelectric power plant along a river alters the dynamics of the watercourse, transforming a lotic environment into a lentic or semilotic one, what can damage the otter's feeding. From April 2008 to March 2009 we analysed the otter's food habits in lotic (streamlet) and semilotic (hydroelectric reservoir) environments of Paranapanema Valley, in southeastern Brazil. Aiming to compare the otter's diet of these two environments, we analyzed statistically the frequency of occurrence of main items in the scats. Fishes represent the base of the diet both in the reservoir and in the streamlet and, despite of the total otter's diet showing up similarities in the two environments, the results evidenced modifications on the fish species consumed between them. In the reservoir the otters ate more exotic fish Oreochromis niloticus (Linnaeus, 1758) probably because it is an easy capture prey in this place. The fact that the otters get established and feed in the reservoir doesn't mean that this structure is benefic to the species because the food supplied for it consists mainly of exotic fish species.

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