Towards the conservation of crucian carp <i>Carassius carassius</i>: understanding the extent and causes of decline within part of its native English range

Sayer, Carl D.; Copp, Gordon H.; Emson, Dave; Godard, Michael; Zięba, Grzegorz; Wesley, K. J.

doi:10.1111/j.1095-8649.2011.03059.x

Cited by 57 publications

(128 citation statements)

References 31 publications

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“…Therefore, stocks of imported angling purposes (Sayer et al, 2011). This is reflected in the complex population structure found between populations in this region.…”

Section: Carassiusmentioning

confidence: 99%

“…One of the most comprehensive of these exists in Norfolk, England, where the species has been designated as a Biodiversity Action Priority (Copp & Sayer, 2010;Sayer et al, 2011). However, given the conflicting views and lack of concrete evidence to underpin the native status of C. carassius in England, the question remains; is C. carassius native to the UK, or is its presence the result of human-mediated translocations?…”

Section: One Species With a Contentious Status In The Uk Is The Crucimentioning

confidence: 99%

“…For example, it can be very difficult to tell C. carassius and C. carpio apart, especially when young and if they are found in sympatry with hybrids present (Wheeler, 2000), as is often the case (Hänfling, Bolton, Harley, & Carvalho, 2005;Sayer et al, 2011). Therefore, stocks of imported angling purposes (Sayer et al, 2011).…”

Section: Carassiusmentioning

confidence: 99%

“…Although the sampling in this study was not exhaustive, it covered the areas of England previously thought to contain native C. carassius populations, in particular Norfolk, which is thought to have been a stronghold for C. carassius in the past (Ellis, 1965;Patterson, 1905;Sayer et al, 2011 One scenario that we cannot rule out however is the possibility that C. carassius colonized naturally, but then either went extinct, or were extirpated by or mixed with stocks which were more recently introduced. In the latter case, the small divergence time observed between English and continental populations could also be driven by admixture between native English C. carassius, and continental strains.…”

Section: Carassiusmentioning

confidence: 99%

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Genetic evidence challenges the native status of a threatened freshwater fish (Carassius carassius) in England

Jeffries

Copp

Handley

et al. 2015

Preprint

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A fundamental consideration for the conservation of a species is the extent of its native range, that is, regions naturally colonized. However, both natural processes and human-mediated introductions can drive species distribution shifts. Ruling out the human-mediated introduction of a species into a given region is vital for its conservation, but remains a significant challenge in most cases. The crucian carp Carassius carassius (L.) is a threatened freshwater fish thought to be native to much of Europe.However, its native status in England is based only on anecdotal evidence. Here, we devise an approach that can be used to empirically test the native status of English fauna. We use this approach, along with 13 microsatellite loci, population structure analyses, and Approximate Bayesian Computation (ABC), to test hypotheses for the origins of C. carassius in England. Contrary to the current consensus, we find strong support for the human-mediated introduction of C. carassius into England during the 15th century. This result stimulates an interesting and timely debate surrounding motivations for the conservation of species. We discuss this topic, and the potential for continued conservation of C. carassius in England, despite its non-native origins. K E Y W O R D SApproximate Bayesian Computation, introduced species, land bridge, microsatellites, postglacial recolonization | INTRODUCTIONObtaining a detailed understanding of a species' native range and the distribution of its diversity within that range is fundamental for species conservation (Frankham, Briscoe, & Ballou, 2002; IUCN 2016;Reed & Frankham, 2003;Scoble & Lowe, 2010). A species is usually considered native if it has colonized an area naturally, whereas it is considered non-native in areas which have been colonized with human intervention (Copp et al., 2005;Gozlan, Britton, Cowx, & Copp, 2010).Species' ranges are not static but often change dramatically over time in response to changing environments, newly-arising dispersal corridors and human-mediated factors. During the last 2.5 MY, the ranges of European biota have been most strongly impacted by glacial cycles (Hewitt, 1999). These processes have been extensively studied, particularly in freshwater fishes, whose postglacial recolonization dynamics have been determined by the history of river drainage systems (Bănărescu, 1990(Bănărescu, , 1992Bernatchez & Wilson, 1998;Bianco, 1990;Hänfling & Brandl, 1998;Jeffries et al., 2016;Reyjol et al., 2006). For example, ephemeral rivers and periglacial lakes that result from glacial meltwater have provided opportunities for fish colonizations (Gibbard, Rose, & Bridgland, 1988) of otherwise isolated drainages (Arkhipov, Ehlers, Johnson, & Wright, 1995;Grosswald, 1980). However, the 2872 | JEEFRJES Jet al current distributions of European freshwater fishes have also been significantly impacted by human-mediated translocations, which have enabled some species to overcome natural dispersal barriers like watersheds (Copp et al., 2005;Gozlan et al., 2010). ...

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“…Therefore, stocks of imported angling purposes (Sayer et al, 2011). This is reflected in the complex population structure found between populations in this region.…”

Section: Carassiusmentioning

confidence: 99%

Section: One Species With a Contentious Status In The Uk Is The Crucimentioning

confidence: 99%

Section: Carassiusmentioning

confidence: 99%

Section: Carassiusmentioning

confidence: 99%

See 2 more Smart Citations

Genetic evidence challenges the native status of a threatened freshwater fish (Carassius carassius) in England

Jeffries

Copp

Handley

et al. 2015

Preprint

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“…The invasion of dense mats of freefloating plants is acknowledged as an important threat to the functioning and biodiversity of freshwater systems (Scheffer et al 2003), with this especially true of ponds (Sayer et al 2011). In this study, we test the potential for using sedimentary diatoms to indirectly infer the past presence of duckweed dominance in ponds.…”

Section: Introductionmentioning

confidence: 99%

Mission possible: diatoms can be used to infer past duckweed (lemnoid Araceae) dominance in ponds

et al. 2017

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Compared to larger lakes, ponds have rarely been the focus of palaeoecological studies. A common feature of ponds, especially those subject to eutrophication, is mass surface coverings of lemnoid Araceae (duckweed) which have severe implications for ecological processes in small waterbodies, in particular lowered oxygen content. To help understand the implications of duckweed dominance for the longterm ecology of ponds, and to determine the potential for palaeoecological studies in ponds more generally, we develop a new diatom-based Lemna-indicator metric. Recent studies of diatom host-plant relationships have shown significant associations between duckweed and the epiphytes Lemnicola hungarica and Sellaphora saugerresii (formally known as Sellaphora seminulum). To determine the potential of these species as palaeo-indicators of long-term duckweed dynamics in ponds, we investigated the diatom composition of surface sediment assemblages in sets of duckweed and non-duckweed-dominated ponds in Norfolk, eastern England. In addition, we undertook diatom analysis of two cores from a small farmland pond (Bodham Rail Pit) subject to a known duckweed dominance event (1999)(2000)(2001)(2002)(2003)(2004)(2005). Both L. hungarica and S. saugerresii were significant predictors of past Lemna dominance in the surface sediments. Further, in the core study, both diatom species accurately and closely tracked the documented ''on-off'' duckweed cycle. Our study suggests huge potential for using ponds in palaeoecological studies and for diatombased investigations of floating plant histories.

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Changes in the diet of a recovering Eurasian otter population between the 1970s and 2010

Almeida

Copp

Masson

et al. 2012

Aquatic Conservation

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ABSTRACT1. Diet is an essential element for understanding how the Eurasian otter (Lutra lutra) is re-colonizing its former range in England following a population decline observed in the 1950s to 1970s.2. Otter spraints from the River Glaven catchment (north Norfolk, eastern England) were collected seasonally between 2009 and 2010 from three habitat types (ponds, 'retenus' (small in-stream reservoirs), and stream stretches). Feeding tactics of the otter were compared between habitat types and, using previously published data, with regard to seasonal changes since the 1970s when the species was in decline.3. Otter diet composition varied greatly, with predation on aquatic invertebrates, crayfish, fish, and tetrapods. Fruit seeds were also found in the spraints. Diet generally reflected habitat, with northern pike (Esox lucius) remains found in spraints from ponds and retenus, whereas European eel (Anguilla anguilla) and gudgeon (Gobio gobio) were prominent in spraints from stream sections. Trophic diversity was particularly high in spraints collected next to ponds. Between the 1970s and the present, crayfish, brown trout (Salmo trutta), cyprinids, Eurasian perch (Perca fluviatilis), birds and mammals increased in prominence, whereas eel and threespine stickleback (Gasterosteus aculeatus) decreased, with notable seasonal variations between the study periods.4. Otter spraints revealed few prey preferences, with only that for gudgeon being ecologically relevant. The consumption of popular sport fishes, in particular common carp (Cyprinus carpio), has given rise to conflicts between recreational anglers and otter conservationists, but no demonstrated preference for carp was observed in the present study.5. Overall, otters have increased their consumption of 'less preferred' (i.e. lower energetic value) food types, and because the species normally preys on the most abundant species available, this suggests declines in 'preferred' prey types. These dietary shifts could contribute to otter dispersal and re-colonization of parts of its original European range where food availability may be higher.

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Towards the conservation of crucian carp Carassius carassius: understanding the extent and causes of decline within part of its native English range

Cited by 57 publications

References 31 publications

Genetic evidence challenges the native status of a threatened freshwater fish (Carassius carassius) in England

Genetic evidence challenges the native status of a threatened freshwater fish (Carassius carassius) in England

Mission possible: diatoms can be used to infer past duckweed (lemnoid Araceae) dominance in ponds

Changes in the diet of a recovering Eurasian otter population between the 1970s and 2010

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