Dietary and spatial overlap between stream populations of a native and two introduced fish species in New Zealand

1991 ◽  
Vol 42 (4) ◽  
pp. 423 ◽  
Author(s):  
GJ Glova ◽  
PM Sagar
Keyword(s):  
New Zealand ◽  
Fish Species ◽  
Salmo Trutta ◽  
Water Velocity ◽  
Native Fish ◽  
Introduced Fish ◽  
Exotic Fish ◽  
Inlet Stream ◽  
Water Depths ◽  
Benthic Prey

Benthic and drifting invertebrates as well as fish were sampled in a lake-inlet stream over a 24-h period in summer in order to investigate interactions for food and space between a native fish species (Galaxias brevipinnis, Galaxiidae) and juveniles of two exotic fish species (Salmo trutta and Oncorhynchus mykiss, Salmonidae) in New Zealand. Galaxias brevipinnis fed almost exclusively at night on the benthos, whereas both trout species fed mostly during the day on drifting and benthic prey. Larvae of Deleatidium (Ephemeroptera), Hydrobiosis and Oxyethira (Trichoptera), and Austro-simulium and Chironomidae (Diptera) were the major prey in the diets of all three fish species. Small prey made up a greater proportion of the diet of G. brevipinnis than for either trout species. All three species of fish were found primarily in riffles and runs in water depths of 0.1-0.3 rn, with G. brevipinnis frequently being in faster-flowing areas (water velocity 0.8-1.1 m s-1) than was either trout species (water velocity 0.4-0.7 rn s-1). These differences in pattern of die1 feeding and micro- habitat use no doubt lessen the interaction between the galaxiid and salrnonid fish species.

Effects of brown trout, Salmo trutta L., on the distribution of some native fishes in three areas of southern Victoria

1980 ◽  
Vol 31 (1) ◽  
pp. 61 ◽  
Author(s):  
PD Jackson ◽  
WD Williams
Keyword(s):  
Brown Trout ◽  
Salmo Trutta ◽  
The Other ◽  
Circumstantial Evidence ◽  
Native Fish ◽  
Introduced Fish ◽  
Brown Trout Salmo Trutta ◽  
Native Fishes ◽  
Yarra River

Eight species of native fish and two of introduced fish were found during studies of the distribution of fishes in streams in three areas of southern Victoria; namely in the upper part of the catchment of the Yarra River, in the Otway Ranges, and on Wilsons Promontory. S. trutta does not occur on Wilsons Promontory, but does occur in the other two areas. Results provide circumstantial evidence that S. trutta has deleteriously affected the occurrence of Galaxias olidus and possibly G. brevipinnis. Some native fishes appear able to coexist with S. trutta.

The spread of exotic fish species in Italian rivers and their effect on native fish fauna since 1990

Biodiversity ◽  
2020 ◽  
pp. 1-9
Author(s):  
Luciano Bani ◽  
Valerio Orioli ◽  
Stefania Trasforini ◽  
Cesare Mario Puzzi ◽  
Andrea Sibilia ◽  
...  
Keyword(s):  
Fish Species ◽  
Fish Fauna ◽  
Native Fish ◽  
Exotic Fish ◽  
Exotic Fish Species

Avoidance of suspended sediment by the juvenile migratory stage of six New Zealand native fish species

1997 ◽  
Vol 31 (1) ◽  
pp. 61-69 ◽  
Author(s):  
Jacques A. T. Boubée ◽  
Tracie L. Dean ◽  
David W. West ◽  
Rhys F. G. Barrier
Keyword(s):  
New Zealand ◽  
Suspended Sediment ◽  
Fish Species ◽  
Native Fish

scholarly journals MANAJEMEN SUNGAI KLAWING UNTUK KELESTARIAN IKAN SPESIES ASLI

2019 ◽  
Vol 6 (2) ◽  
pp. 88
Author(s):  
Ayesha Hafizh Gunara ◽  
Siti Rukayah
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Riparian Vegetation ◽  
Good Condition ◽  
Liquid Waste ◽  
Native Fish ◽  
Fishing Gear ◽  
Introduced Fish ◽  
Government Regulations ◽  
Source Of Pollution

<p><em>This study aims to determine the water quality in the Klawing River, riparian vegetation, native and introduced fish, utilization, the presence of pollutant resources, fishing practices, and regional regulations related to the Klawing River. Research methods by surveying and searching libraries. The results showed that the condition of water quality in the Klawing River upstream was in good condition, while the middle and downstream parts had decreased. Riparian vegetation in the upper reaches is still dominated by trees compared to the middle and downstream. Along the Klawing River, there are still many locations that have the potential for erosion. There are 23 species of fish found along the Klawing River. Among these species, there are 16 species of native fish species and 7 species of introduced fish species. The source of pollution in the Klawing River comes from liquid waste and solid waste. Fishing is done by using fishing gear such as fishing rods, nets, stone cages, but there are still those who use drugs and stroom. Existing regulations on the Klawing River only refer to government regulations governing the river because it does not yet have a special PERDA.</em><em></em></p>

scholarly journals Differences in sensitivity of native and exotic fish species to changes in river temperature

2011 ◽  
Vol 57 (6) ◽  
pp. 852-862 ◽  
Author(s):  
R.S.E.W. Leuven ◽  
A.J. Hendriks ◽  
M.A.J. Huijbregts ◽  
H.J.R. Lenders ◽  
J. Matthews ◽  
...  
Keyword(s):  
Exotic Species ◽  
Fish Species ◽  
Native Species ◽  
Temporal Trends ◽  
Fish Fauna ◽  
Native Fish ◽  
Fish Diversity ◽  
Exotic Fish ◽  
River Temperature ◽  
Exotic Fish Species

Abstract This paper describes the effects that temperature changes in the Rhine river distributaries have on native and exotic fish diversity. Site-specific potentially affected fractions (PAFs) of the regional fish species pool were derived using species sensitivity distributions (SSDs) for water temperature. The number of fish species in the river distributaries has changed remarkably over the last century. The number of native rheophilous species declined up until 1980 due to anthropogenic disturbances such as commercial fishing, river regulation, migration barriers, habitat deterioration and water pollution. In spite of progress in river rehabilitation, the native rheophilous fish fauna has only partially recovered thus far. The total number of species has strongly increased due to the appearance of more exotic species. After the opening of the Rhine-Main-Danube waterway in 1992, many fish species originating from the Ponto-Caspian area colonized the Rhine basin. The yearly minimum and maximum river temperatures at Lobith have increased by circa 4 0C over the period 1908-2010. Exotic species show lower PAFs than native species at both ends of the temperature range. The interspecific variation in the temperature tolerance of exotic fish species was found to be large. Using temporal trends in river temperature allowed past predictions of PAFs to demonstrate that the increase in maximum river temperature negatively affected a higher percentage of native fish species than exotic species. Our results support the hypothesis that alterations of the river Rhine’s temperature regime caused by thermal pollution and global warming limit the full recovery of native fish fauna and facilitate the establishment of exotic species which thereby increases competition between native and exotic species. Thermal refuges are important for the survival of native fish species under extreme summer or winter temperature conditions.

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

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.

Freshwater, Fish and the Future: Proceedings of the Global Cross-Sectoral Conference

2016 ◽  
Keyword(s):  
Fish Species ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Native Fish ◽  
Exotic Fish ◽  
Natural Lakes ◽  
Fish Catch ◽  
Total Fish ◽  
Native Fishes ◽  
Pokhara Valley

<em>Abstract.</em> —Nepal is rich in water resources and fishing is a longstanding tradition. Capture fisheries are an important sector in Nepal and contribute approximately 0.5% to the national gross domestic product. The fish catch data of the Phewa, Begnas, and Rupa lakes of the Pokhara Valley from 2006 and 2011 were analyzed to determine the harvest trends of the exotic Nile Tilapia <em>Oreochromis niloticus </em> and native fish. The harvest of Nile Tilapia increased and the harvest of native fish species decreased in the lakes of Pokhara Valley. Harvest from the capture fisheries has increased in these lakes since Nile Tilapia became established. The introduction of Nile Tilapia in these lakes was accidental. Due to an increase in Nile Tilapia catches, the income of the Jalari community has increased, enhancing its livelihood. The native fishes of the Pokhara Valley lakes, however, are highly valued and provide a direct livelihood for the Jalari community living around the lakes. Population growth, urbanization, tourism, agricultural intensification, illegal fishing, and the introduction of exotic fish species are the drivers that affect the capture fisheries in Phewa, Begnas, and Rupa lakes. Regular monitoring and stock enhancement programs for native fish species and selective harvesting of Nile Tilapia will mitigate the problem of overpopulation of Nile Tilapia. To control further expansion of Nile Tilapia into other natural lakes, reservoirs, and rivers of Nepal, native fish conservation policy, laws, and protocols should be rigorously enforced. This paper discusses the drivers of fisheries, the increasing trend of Nile Tilapia in total fish catch, and its possible effect on native fish species and the livelihood of dependent communities of the lakes of the Pokhara Valley.

scholarly journals Rapid expansion and biodiversity impacts of the red devil cichlid (Amphilophus labiatus, Günther 1864) in Lake Sentani, Papua, Indonesia

2018 ◽  
Vol 19 (6) ◽  
pp. 2096-2103 ◽  
Author(s):  
HENDERITE L. OHEE ◽  
PUGUH SUJARTA ◽  
SURIANI BR. SURBAKTI ◽  
HOLLY BARCLAY
Keyword(s):  
Fish Species ◽  
Fish Fauna ◽  
Wiener Index ◽  
Rapid Expansion ◽  
Native Fish ◽  
Fish Diversity ◽  
Exotic Fish ◽  
Dominant Fish ◽  
Total Fish ◽  
Trophic Niches

Ohee HL, Sujarta P, Br Surbakti S, Barclay H. 2018. Rapid expansion and biodiversity impacts of the red devil cichlid (Amphilophus labiatus, Günther 1864) in Lake Sentani, Papua, Indonesia. Biodiversitas 19: 2096-2103. The red devil cichlid (Amphilophus labiatus, Günther 1864) is one of ten exotic fish species inhabiting Lake Sentani. It is believed to be one of the most important threats to the native fish of Lake Sentani. This study aimed to document the distribution of red devil cichlids and the impacts of this species on native fish fauna. Fish were sampled in six locations in Lake Sentani using gill nets during February and March 2018. Fish species and abundance were recorded and used to calculate the relative abundance, dominance, species evenness, Shannon Wiener Index (H’) and the correlation between introduced and native fish species. A total of 836 fish belonging to 12 species were recorded across Lake Sentani. Mean fish diversity (H’=0.57) and evenness (E= 0.25) were low. The red devil cichlid is the most abundant fish recorded during our surveys (87.2% of total fish collected) and is now the most dominant fish in the lake (C=0.76). Moreover, it has colonized all areas sampled within the lake because of its ability to colonize new habitat and to successfully exploit a large diversity of trophic niches. However, Amphilophus labiatus was not found to be significantly correlated to native fish between different sites in Lake Sentani. The existence of endemic and native fish in Lake Sentani is now seriously threatened by the presence of the red devil cichlid throughout this lake.

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