Justification for retention of the catch-and-release in the wild brown trout Salmo cf. trutta fishery

Simonović, Predrag; Grubic, G.; Marić, Ana; Atlagić, Jelena Čanak; Jurlina, Dubravka Škraba; Nikolić, Vera

doi:10.1016/j.fishres.2017.12.010

Cited by 6 publications

(6 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast to the positive effects that sustainable management in trout fisheries have [e.g., the conditional and unconditional catch-and-release (Simonović et al, 2018)], both fishery managers and trout farmers fostered stocking of farmed brown trout fry and even spent brood fish (Simonović et al, 2014) to quickly enhance brown trout fisheries and accelerate return of investments (Simonović et al, 2017b). Based on recent knowledge of the native diversity of brown trout in the Western Balkans (Marić et al, 2006;Simonović et al, 2017a) and the risks posed to them by the introduction of non-native strains of brown trout and related species might pose to them (Simonović et al, 2013(Simonović et al, , 2015, recent surveys have revealed the occurrence of permanent, long-lasting introduction caused by stocking streams attractive for trout fisheries (Simonović et al, 2014;Škraba Jurlina et al, 2018), streams originally devoid of trout prior to stocking (Jadan et al, 2007;Simonović et al, 2018), and even streams that are not at all suitable for brown trout fisheries (Tošić et al, 2016;Škraba et al, 2017). Introduction of trout fish of the non-native haplogroups and of the non-native haplotypes in the dispersal area of brown trout of the DA haplogroup in the Western Balkans has been a long-standing practice since the mid-nineteenth century at least, when Slovenia, Croatia, and Bosnia and Herzegovina were parts of the Austro-Hungarian Empire (Razpet et al, 2007;Simonović et al, 2017b).…”

Section: Discussionmentioning

confidence: 98%

Alternative Life-History in Native Trout (Salmo spp.) Suppresses the Invasive Effect of Alien Trout Strains Introduced Into Streams in the Western Part of the Balkans

et al. 2020

Self Cite

View full text Add to dashboard Cite

The diversity of native trout fish Salmo spp. comprises a variety of nominal taxa in Serbia, Montenegro, and Bosnia and Herzegovina. Recent mapping of the resident trout populations detected the presence of brown trout Salmo trutta (sensu stricto) of the Atlantic (AT) mtDNA lineage introduced into populations of both tentative Danubian trout Salmo labrax and of tentative Adriatic trout Salmo farioides belonging to the Danubian (DA) and Adriatic (AD) mtDNA lineages, respectively. Introduction of the tentative Macedonian trout Salmo macedonicus of the AD lineage was also detected in a native population of the tentative S. labrax. In almost all recipient nonmigratory trout populations, a cross-breeding between native and introduced trout was detected by heterozygosity in either only the LDH-C nuclear locus or the LDH-C and specific microsatellite loci. The only exception was a population where both resident and migratory, lake-dwelling individuals of the tentative Adriatic trout spawned in a downstream section of a stream in Montenegro, as no microsatellite alleles of Atlantic brown trout that had been introduced upstream were detected. The occurrence of cross-breeding between Adriatic and brown trout was evident in the isolated, upstream section. It appears that migrating, lake-dwelling Adriatic trout in combination with their resident, stream-dwelling conspecifics suppress the introgression of genes from those situated upstream. In this regard, consideration should be given to the occurrence of the migratory brown trout in the Danube River at the broader Iron Gate Gorge area. They migrate in late summer and early fall from the Iron Gate One reservoir to the lower sections of tributaries devoid of any trout fish. However, some of these streams house very special native trout of the DA lineage in their short-extending upper sections. These native trout populations are, so far, still out of contact with the reservoir-dwelling trout. However, given the resilience of trout and their migratory life history, the outcome of this introduction could be deleterious for those native fish that are very precious in the conservation sense.

show abstract

Section: Discussionmentioning

confidence: 98%

Alternative Life-History in Native Trout (Salmo spp.) Suppresses the Invasive Effect of Alien Trout Strains Introduced Into Streams in the Western Part of the Balkans

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Still, not all of the DA haplotypes are considered native to the Western Bakans area/region. The presence of nonnative DA haplotypes, as well as other phylogenetic lineages, in most of the studied rivers presents a significant threat to the native population's genetic structure (Snoj, 2004;Marić et al, 2006;Jadan et al, 2007;Tošić et al, 2016;Simonović et al, 2017a;Buj et al, 2020;Ivić et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Although the research on genetic variability of brown trout has been extensively conducted to assess the introgression of farmed lineages, gene-level monitoring programs are still notably absent, despite repeated calls for their implementation (Laikre et al, 2008;Tošić et al, 2016;Simonović et al, 2017a;Škraba-Jurlina et al, 2020). To ensure the survival of a population or species, it is necessary to preserve its genetic diversity, and thus its evolutionary potential (Ryman et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Loss of native brown trout diversity in streams of the continental Croatia

Kanjuh,

Marić,

Škraba Jurlina

et al. 2024

Front. Environ. Sci.

Self Cite

View full text Add to dashboard Cite

Introduction: The genetic diversity of brown trout in the Western Balkans has been disrupted by the introduction of non-native Atlantic phylogenetic lineages and non-native haplotypes of the Danubian phylogenetic lineage. The Western Balkans is characterized by the greatest phenotypic and genotypic diversity of trout populations, and a large part of the internal territory belongs to the Black Sea basin, where the Danubian Da1 haplotype is native. Artificial propagation of non-native lineages in the Western Balkans has a long history, and these populations are often the only available material for stocking rivers attractive for fishing.Material and Methods: Fifteen populations in the Danube basin of the continental Croatia were analysed. The analysis of eight microsatellite loci was performed to determine the structure of brown trout populations, as well as the degree of introgression of non-native genetic material into the native.Results and Disscusion: The results of this study showed significant genetic similarity among brown trout populations, confirming a long history of introduction with non-native genetic material. The main reason was uncontrolled stocking with inadequate material, which is available in fish farms and consists mainly of brown trout of the Atlantic phylogenetic lineage. The results of this study also indicated stocking with brown trout of the non-native haplotypes of the Danubian phylogenetic lineage. The potential breeding origin of brown trout carrying the Danubian Da2 mtDNA haplotype and ways of its introduction into rivers have yet to be investigated. For the survival of the unique gene pool of brown trout in Croatian rivers, it is of fundamental importance to know the structure of wild and farmed populations with the aim of proposing and implementing conservation measures.

show abstract

“…Overexploitation and reduced catches may be met by different means like increased minimum legal size to increase the spawning stock of indigenous populations (Anderson & Nehring, ; Cooke & Schramm, ; Pinder, Raghavan, & Britton, ; Pope, Wilde, & Knabe, ; Simonović et al, ). Supplemental stocking may increase the fishable stock (Cowx, ), but can also cause reduction of wild fish populations (Vincent, ), and lead to increased angling impact on wild stocks (Baer, Blasel, & Diekmann, ).…”

Section: Introductionmentioning

confidence: 99%

Effects of brown trout ( Salmo trutta L.) stocking and catch‐release practice on angling catches in the River South Rena in southeast Norway

et al. 2019

View full text Add to dashboard Cite

Preserving of fish species and populations is important whether it is for exploitation or just for conservation. Management of fisheries aim to maintain fishable stocks that are attractive to anglers, and different means are performed. In this study from the River South Rena in southeastern Norway, conducted during 1991–2005, the effects of supportive stocking of hatchery reared brown trout (Salmo trutta L.) from 1996, and bag limit (BL) and catch‐release (CR) practice for the target species brown trout, from 2002, were explored. Effects of supplemental brown trout stocking was not noticeable, except from one year following a year of exceptional high number of stocked fish, actually 41% of the catches, whereas in the following years this proportion remained constant about 10%, and the catches remained high in 2003 and 2004, mainly due to increased angling success rate after BL‐CR introduction.

show abstract

Justification for retention of the catch-and-release in the wild brown trout Salmo cf. trutta fishery

Cited by 6 publications

References 28 publications

Alternative Life-History in Native Trout (Salmo spp.) Suppresses the Invasive Effect of Alien Trout Strains Introduced Into Streams in the Western Part of the Balkans

Alternative Life-History in Native Trout (Salmo spp.) Suppresses the Invasive Effect of Alien Trout Strains Introduced Into Streams in the Western Part of the Balkans

Loss of native brown trout diversity in streams of the continental Croatia

Effects of brown trout ( Salmo trutta L.) stocking and catch‐release practice on angling catches in the River South Rena in southeast Norway

Contact Info

Product

Resources

About