Facilitation Fish Migration above the Discharge Sill Located on the Ialomiţa River Near Cave Ialomicioara

2016 ◽  
Vol 16 (2) ◽  
pp. 44-58 ◽  
Author(s):  
Răzvan Voicu ◽  
Lawrence G. Dominguez
Keyword(s):  
Salmo Trutta ◽  
Legal Framework ◽  
Fish Migration ◽  
Power Sources ◽  
Cottus Gobio ◽  
Connectivity Restoration ◽  
Concrete Plate ◽  
Discharge Management ◽  
Longitudinal Connectivity ◽  
Conventional Systems

AbstractLongitudinal connectivity restoration of watercourses is a major duty for scientists (biologists, hydro engineers, chemists etc.) that, by the means of technical exchange via conferences, projects, workshops, universities, and institutions demonstrate the major importance of a natural (non-anthropic) function of the lotic ecosystems. On the Ialomiţa River, the discharge sills located downstream from Padina chalet block the migration of some fish species, such as the brown trout (Salmo trutta) and the bullhead (Cottus gobio), prohibiting access to foraging areas and springs. Water Framework Directive 60/2000 / EC provides a legal framework for restoring “good status” of longitudinal and lateral connectivity of watercourses. Our proposed solution I can be applied to other discharge sills and dams sized between 3m and 6m high, and, where feasible can utilize existing power sources of some discharge sills. Solution II’s concepts allow the dimples inside the concrete plate to serve as a rest and recovery area for migratory species. Such benefits that ensure upstream/downstream fish migration while allowing discharge management to continue is unattainable in conventional systems. After solution II is applied the discharge sill does not lose any baseline characteristics while maintaining the original hydro-technical design objective, flood dissipation.

On the bionomics ofCrepidostomum metoecus(Braun, 1900) andCrepidostomum farionis(Müller, 1784) (Trematoda: Allocreadiidae)

Parasitology ◽  
1968 ◽  
Vol 58 (2) ◽  
pp. 307-324 ◽  
Author(s):  
J. B. E. Awachie
Keyword(s):  
Salmo Trutta ◽  
Time Lag ◽  
Ecological Factors ◽  
Life Cycles ◽  
Trophic Factors ◽  
Annual Cycles ◽  
Cottus Gobio ◽  
The United Kingdom ◽  
North Wales ◽  
History Of

The life-cycles of the two species ofCrepidostomumoccurring in a stream in North Wales are investigated. Both species share the same arthropod and definitive hosts, viz.Gammarus pulexandSalmo trutta, respectively, but have different molluscan hosts, viz.:Lymnaea peregraforC. metoecusandPisidium casertanumforC. farionis.C. metoecusandC. farionishave annual cycles, hence periodicity of occurrence in their hosts. InC. metoecusthe dynamics of occurrence in the three hosts are correlated. The inverse relationship inG. pulexandS. truttaas well as the existence of a time-lag of 3–4 months between the establishment of this worm inG. pulexand inS. truttaare discussed.Neither premunition nor age-resistance occurs in the parasitization ofS. truttaandG. pulexbyC. metoecus. The increase in the rate and degree of infestation with the age and length of fish, except in the oldest and longest group, is shown to be due to trophic factors.C. metoecusis more abundant and widely distributed in the stream thanC. farionis. This fact is associated with the occurrence of their molluscan hosts.Experimental observations were made on the stages in the life-history ofC. metoecus, including the mode of emergence of the cercaria, invasion of shrimps and encystment, as well as development of the metacercariae inG. pulex.More cercariae are shed by day and at higher temperatures, and they live for about 5 days at 8 °C. The metacercaria undergoes considerable development before becoming infective.C. metoecusdoes extensive damage toL. peregra, has no observed ill-effect on trout, and apparently affects the life-span of shrimps adversely only in cases of very heavy infestations.The non-parasitization ofCottus gobioby the two flukes is probably due to the prevailing ecological factors.My thanks are due to Professor H. B. N. Hynes and Dr J. C. Chubb for many helpful criticisms at all stages of this study; to Miss Joan Venn for helping with the sampling programme; and the Commonwealth Scholarship Commission in the United Kingdom for financial support.

scholarly journals Innovative On-Site Adapted System for Fish Migration with Flow Divider and Glass Collector Basin

2020 ◽  
Vol 22 (1) ◽  
pp. 81-98
Author(s):  
Răzvan Voicu ◽  
Artur Radecki-Pawlik ◽  
Liliana Voicu ◽  
Joseph Dominick Urbani ◽  
Doru Bănăduc
Keyword(s):  
High Water ◽  
Fish Passage ◽  
Fish Migration ◽  
Large Fish ◽  
Urban Sector ◽  
Stream Bank ◽  
Flow Divider ◽  
Longitudinal Connectivity ◽  
Lotic System ◽  
The Right

Abstract The authors designed a new site-adapted fish passage system for upstream and downstream migration of small and large fish on the urban sector of the Bistriţa River. The longitudinal connectivity of this lotic system is interrupted by numerous transversal hydrotechnical works (weirs). This proposed system was designed to facilitate fish migration, promote fish recolonization of upstream and downstream habitats, allow the expansion of fish range, and increase spawning potential. All components of the proposed system are attached to a concrete girder located to the right stream bank, except a glass basin that is submerged in the riverbed. The positioning of the system in this girder ensures its resistance to high water events, while offering safe passage for fish in both directions.

scholarly journals Passage Performance of Technical Pool-Type Fishways for Potamodromous Cyprinids: Novel Experiences in Semiarid Environments

2019 ◽  
Author(s):  
Francisco J. Sanz-Ronda ◽  
Francisco J. Bravo-Córdoba ◽  
Ana Sánchez-Pérez ◽  
Ana García-Vega ◽  
Jorge Valbuena-Castro ◽  
...  
Keyword(s):  
Fish Passage ◽  
Swimming Behavior ◽  
Fish Migration ◽  
Pit Tag ◽  
Semiarid Environments ◽  
Vertical Slot ◽  
Longitudinal Connectivity ◽  
The World ◽  
Migration Pathways ◽  
Pool Type

Endemic freshwater fish from semiarid environments are among the most threated species in the world due to the water overexploitation and habitat fragmentation problems. Stepped or pool-type fishways are used worldwide to reestablish longitudinal connectivity and mitigate fish migration problems. Many of them are being installed or planned in rivers of semiarid environments, however, very few studies about fish passage performance through pool-type fishways has been carried out to date on these regions. The present work focuses on the passage performance of two potamodromous cyprinids endemic of these regions, with different ecological and swimming behavior: southern Iberian barbel (Luciobarbus sclateri) and Iberian straight-mouth nase (Pseudochondrostoma polylepis), in two of the most common types of stepped fishways: vertical slot and submerged notch with bottom orifice fishways. Experiments were carried out during the spawning season in the Segura River (South-Eastern Spain), using a PIT tag and antennas system. Ascent success was greater than 80%, with a median transit time lower than 17 minutes per meter of height in all trials and for both species and fishway types. Results show that both types of fishways, if correctly designed and built, provide interesting alternatives for the restoration of fish migration pathways on these regions.

Improving Upstream and Downstream Fish Passage at Retis Dam on Hârtibaciu River - Sibiu County (Transylvania)

2017 ◽  
Vol 17 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Răzvan Voicu ◽  
Pete Baki
Keyword(s):  
Fish Fauna ◽  
Fish Passage ◽  
Hydraulic Structures ◽  
Fish Migration ◽  
Lateral Connectivity ◽  
Longitudinal Connectivity ◽  
Barbatula Barbatula ◽  
Cobitis Taenia ◽  
Misgurnus Fossilis ◽  
Squalius Cephalus

Abstract Retis (dam Retis), hydro-technical development like many other transverse hydraulic structures cancel the longitudinal connectivity of Hârtibaciu water course, blocking the migration of different (migrating) species of fish in the river. Also, the lateral connectivity was heavily affected on this water course at a rate of 60%. Therefore, proposing engineering solutions to recover both (lateral and longitudinal) types of connectivity is vital to restore the local ecobiom. The purpose of this article is to establish longitudinal connectivity through an engineering solution that facilitates the fish migration upstream - downstream of Retis dam. This paper proposes an engineered fish passage solution for Retiș Dam on the Hârtibaciu River, using the criteria described in the Water Framework Directive 2000/60/EC document. Anthropogenic barriers located in the Hârtibaciu River disrupt and delay movement of local fish fauna including: Alburnoides bipunctatus (Bloch, 1782), Squalius cephalus (Linnaeus, 1758), Alburnus alburnus (Linnaeus, 1758), Rhodeus amarus (Bloch, 1782), Gobio gobio (Linnaeus, 1758), Romanogobio kessleri (Dybowski, 1862), Barbatula barbatula (Linnaeus, 1758), Barbus meridionalis Risso, 1827 Misgurnus fossilis (Linnaeus, 1758), Cobitis taenia Linnaeus, 1758, Cobitis romanica (Băcescu, 1943), and Cobitis aurata (De Filippi, 1863).

Assessing food-web structure, matter fluxes, and system attributes of a Central European mountain stream by performing mass-balanced network analysis

2004 ◽  
Vol 61 (9) ◽  
pp. 1565-1581 ◽  
Author(s):  
Elisabeth I Meyer ◽  
Rainer Poepperl
Keyword(s):  
Food Web ◽  
Salmo Trutta ◽  
Dry Mass ◽  
Trophic Levels ◽  
Mountain Stream ◽  
Food Web Structure ◽  
Total Consumption ◽  
Cottus Gobio ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Brown Trout Salmo Trutta

Trophic interactions and cycling of matter within the community in a soft-water mountain stream were analyzed on the basis of a compartment food-web model. The model describes (i) the structure of the food web, quantifying biomass, production, and consumption of individual elements as well as of the entire system, and (ii) the flow of matter between compartments as well as trophic levels. Detritus and primary producers sustain a broad variety of invertebrate consumers. Fishes are the top predators; sculpin (Cottus gobio) and a compartment consisting of brown trout (Salmo trutta) and rainbow trout (Oncorhynchus mykiss) are at the highest trophic level. Heterotrophic microorganisms (227.1 g dry mass (DW)·m–2·year–1) and aufwuchs algae (150.1 g DW·m–2·year–1) have the highest production. Secondary production of fishes and macroinvertebrates amounts to 2.56 and 19.9 g DW·m–2·year–1, respectively. Total consumption amounts to 1136.41 g DW·m–2·year–1. Main flows occur between the lower trophic levels. Food intake is greatest for microorganisms and Ephemeroptera. A relatively high fraction of invertebrate production is consumed by predators. For 10 of 19 compartments, over 95% of production is used as food by other organisms. Transfer efficiencies are generally low (<10%). A large proportion of matter transfer occurs at the lower discrete trophic levels of the stream.

scholarly journals Past, present and future of the fish community of Lake Orta (Italy), one of the world’s largest acidified lakes

2016 ◽  
Vol 75 (s2) ◽  
Author(s):  
Pietro Volta ◽  
Norman D. Yan ◽  
John M. Gunn
Keyword(s):  
Fish Species ◽  
Salmo Trutta ◽  
Fish Community ◽  
Cold Water ◽  
Salvelinus Alpinus ◽  
Arctic Charr ◽  
Anguilla Anguilla ◽  
Coregonus Lavaretus ◽  
Cottus Gobio ◽  
Sampling Campaign

<p>Since 1926, the fishes in Lake Orta, one of Italy’s deepest natural lakes, were heavily damaged by profundal hypoxia and acidification linked to oxidation of ammonia from industrial effluents and by industrial metal pollution. Of the original 28 fish species, only perch survived the lake’s contamination. Recently, the water quality of the lake has been largely restored by reductions in pollutant inputs, and a massive liming intervention. These interventions restored fish habitat, but it is unclear whether the recent fish reintroductions were successful, and the present status of the fish community is unknown.  Here we reviewed the history of the Lake Orta fish assemblage. Using an extensive 2014 sampling campaign, we compared the present fish community to both its pre-pollution composition and to the assemblages of nearby un-polluted, but otherwise similar lakes, Lake Mergozzo and Lake Maggiore. While nearshore fish density now appears normal in lake Orta, the open water community remains impoverished both in numbers and in species. Epilimnetic and hypolimnetic benthic nets were dominated by perch and roach in all the three lakes, but the catch of pelagic nets differed among lakes. Perch (<em>Perca fluviatilis)</em>, rudd (<em>Scardinius erythrophthalmus)</em> and brown trout (<em>Salmo trutta</em>) dominated in Lake Orta while shad (<em>Alosa fallax lacustris</em>) and coregonids (<em>Coregonus</em> spp.) were dominant in the open waters of the other two lakes, but missing from Lake Orta.  Many fully or partially migratory species, including marble trout (<em>Salmo trutta marmoratus)</em>, eel (<em>Anguilla Anguilla)</em> and barbel (<em>Barbus plebejus)</em> were also missing from Lake Orta, a consequence of their initial extirpation and blocked re-colonization routes along the River Strona. In comparison with both pre-pollution and contemporary reference data, the fish community of Lake Orta has not been rehabilitated. The recovery of the littoral community is complete, but cold water species such as burbot (<em>Lota lota), </em>Arctic charr (<em>Salvelinus alpinus)</em> and bullhead (<em>Cottus gobio)</em> are still lacking, as are the pelagic zooplanktivores European whitefish (<em>Coregonus lavaretus)</em> and shad, which dominate offshore communities in the reference lakes, as they did a century ago in Lake Orta.  To propose priorities for fish community rehabilitation in Lake Orta, we categorized the conservation, ecological and fishing values of each missing fish species in the lake, and evaluated the cost and probability of success of the needed intervention for each species. This analysis indicated that rehabilitation of shad and European whitefish should receive highest priority.</p>

Observations on Cyathocephalus truncatus Pallas, 1781 (Cestoda: Spathebothriidea) in its Intermediate and Definitive Hosts in a Trout Stream, North Wales

1966 ◽  
Vol 40 (1-2) ◽  
pp. 1-10 ◽  
Author(s):  
J. B. E. Awachie
Keyword(s):  
Brown Trout ◽  
Annual Cycle ◽  
Salmo Trutta ◽  
Feeding Habits ◽  
Age Groups ◽  
Older Age ◽  
Cottus Gobio ◽  
North Wales ◽  
Food And Feeding

Of the three species of fish which live in Afon Terrig (Salmo trutta, Cottus gobio and Nemacheilus barbatula), only S. trutta was infected by Cyathocephalus truncatus. The parasite has a clear annual cycle and hence a periodicity of occurrence in the brown trout.No age resistance of fish to infection by C. truncatus is found. The increase of incidence with age among l+—3+ year-old fish and decrease in the older age groups are correlated with the variation in the food and feeding habits of trout with age.

scholarly journals Passage Performance of Technical Pool-Type Fishways for Potamodromous Cyprinids: Novel Experiences in Semiarid Environments

Water ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 2362 ◽  
Author(s):  
Sanz-Ronda ◽  
Bravo-Córdoba ◽  
Sánchez-Pérez ◽  
García-Vega ◽  
Valbuena-Castro ◽  
...  
Keyword(s):  
Fish Passage ◽  
Antenna System ◽  
Fish Migration ◽  
Pit Tag ◽  
Passive Integrated Transponder ◽  
Semiarid Environments ◽  
Vertical Slot ◽  
Longitudinal Connectivity ◽  
Migration Pathways ◽  
Pool Type

Endemic freshwater fish from semiarid environments are among the most threated species in the world due to water overexploitation and habitat fragmentation problems. Stepped or pool-type fishways are used worldwide to reestablish longitudinal connectivity and mitigate fish migration problems. Many of them are being installed or planned in rivers of semiarid environments, however, very few studies about fish passage performance through pool-type fishways has been carried out to date on these regions. The present work focuses on the passage performance of two potamodromous cyprinids endemic of these regions, with different ecological and swimming behavior: southern Iberian barbel (Luciobarbus sclateri) and Iberian straight-mouth nase (Pseudochondrostoma polylepis). These are assessed in two of the most common types of stepped fishways: vertical slot and submerged notch with bottom orifice fishways. Experiments were carried out during the spawning season in the Segura River (southeastern Spain), using a passive integrated transponder (PIT) tag and antenna system. Ascent success was greater than 80%, with a median transit time lower than 17 minutes per meter of height in all trials, and for both species and fishway types. Results show that both types of fishways, if correctly designed and constructed, provide interesting alternatives for the restoration of fish migration pathways in these regions.

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