scholarly journals Stable resource polymorphism along the benthic littoral–pelagic axis in an invasive crayfish

2020 ◽  
Vol 10 (5) ◽  
pp. 2650-2660
Author(s):  
Iris Lang ◽  
Charlotte Evangelista ◽  
Rebecca Marie Everts ◽  
Géraldine Loot ◽  
Julien Cucherousset
Keyword(s):  
Resource Polymorphism ◽  
Invasive Crayfish

Estimating native and invasive crayfish distributions in relation to culvert barriers with environmental DNA

2019 ◽  
Vol 38 (3) ◽  
pp. 629-641 ◽  
Author(s):  
Kousuke Ikeda ◽  
Hideyuki Doi ◽  
Shigeharu Terui ◽  
Atsuko Kato ◽  
Takashi Mitsuzuka ◽  
...  
Keyword(s):  
Environmental Dna ◽  
Invasive Crayfish

scholarly journals Pelagic–littoral resource polymorphism in Hovsgol grayling Thymallus nigrescens from Lake Hovsgol, Mongolia

2019 ◽  
Vol 28 (3) ◽  
pp. 411-423 ◽  
Author(s):  
Kirk W. Olson ◽  
Trevor J. Krabbenhoft ◽  
Thomas R. Hrabik ◽  
Bud Mendsaikhan ◽  
Olaf P. Jensen
Keyword(s):  
Resource Polymorphism ◽  
Lake Hovsgol

Behavioural responses of Australian freshwater crayfish (Cherax cainii and Cherax albidus) to exotic fish odour

2006 ◽  
Vol 54 (6) ◽  
pp. 399 ◽  
Author(s):  
S. G. Height ◽  
G. J. Whisson
Keyword(s):  
Western Australia ◽  
Predatory Fish ◽  
Behavioural Plasticity ◽  
Current Debate ◽  
Freshwater Crayfish ◽  
Indigenous Species ◽  
Exotic Fish ◽  
Behavioural Responses ◽  
Invasive Crayfish ◽  
Australian Freshwater

Exotic finfish and crayfish have been translocated into Western Australia for more than 100 years. Deliberate stocking and subsequent escape from man-made impoundments have resulted in widespread distribution of non-native yabbies (Cherax albidus) and the exotic redfin perch (Perca fluviatilis) in the State’s south-west. Both species are considered invasive and are known to compete with indigenous species for resources. The nature and degree of impact on native marron (Cherax cainii) is unclear and the subject of current debate. Other researchers have hypothesised that invasive species modify their behaviour in the presence of predators in a more rapid and advantageous manner than native species. This greater behavioural plasticity can result in displacement of indigenous species and successful colonisation of invaders. The aim of this study was to investigate behavioural responses of an indigenous crayfish (C. cainii) and an invasive crayfish (C. albidus) to odours from a native predator (Tandanus bostocki) and an exotic predatory fish (P. fluviatilis) present in Western Australia. Crayfish behaviour was observed in individual glass tanks following the addition of odours from native (T. bostocki) or exotic (P. fluviatilis) finfish predators. Marron exhibited minor behavioural modifications when presented with odours from native or exotic finfish. In contrast, the invasive yabby showed greater detection of odours, displaying significant changes in behaviour (P < 0.05). Yabbies also appeared to distinguish between food odour (commercial crayfish feed) and predator odour; however, neither marron nor yabbies displayed behaviour indicating that they could distinguish between a native or exotic fish predator. Results support the hypothesis that invasive crayfish species have a greater capacity for behavioural plasticity than non-invasive crayfish.

The influence of evolution and plasticity on the behavior of an invasive crayfish

2016 ◽  
Vol 19 (3) ◽  
pp. 815-830 ◽  
Author(s):  
Lindsey S. Reisinger ◽  
Ashley K. Elgin ◽  
Kevin M. Towle ◽  
David J. Chan ◽  
David M. Lodge
Keyword(s):  
Invasive Crayfish

Stabilization of Population Fluctuations due to Cannibalism Promotes Resource Polymorphism in Fish

2007 ◽  
Vol 169 (6) ◽  
pp. 820-829 ◽  
Author(s):  
Jens Andersson ◽  
Pär Byström ◽  
David Claessen ◽  
Lennart Persson ◽  
Andre M. De Roos
Keyword(s):  
Population Fluctuations ◽  
Resource Polymorphism

Intrinsic and extrinsic sources of variation in the diets of harp and hooded seals revealed by fatty acid profiles

2009 ◽  
Vol 87 (2) ◽  
pp. 139-151 ◽  
Author(s):  
Strahan Tucker ◽  
W. Don Bowen ◽  
Sara J. Iverson ◽  
Garry B. Stenson
Keyword(s):  
Fatty Acid ◽  
North Atlantic Ocean ◽  
Geographic Location ◽  
Deep Ocean ◽  
Resource Polymorphism ◽  
The North ◽  
Pagophilus Groenlandicus ◽  
Ontogenetic Niche Shifts ◽  
Significant Difference ◽  
Sources Of Variation

Individuals of different age, sex, and morphology are expected to exhibit differences in dietary niches largely owing to sexual dimorphism, ontogenetic niche shifts, and resource polymorphism. Harp ( Pagophilus groenlandicus (Erxleben, 1777)) and hooded ( Cystophora cristata (Erxleben, 1777)) seals are geographically overlapping and highly migratory predators in the North Atlantic Ocean. These species differ in their diving behaviour, with hooded seals diving deeper, longer, and more associated with the continental shelf edge and deep ocean than harp seals. We examined blubber fatty acid (FA) composition (N = 37; 93% of total FA by mass) of harp (adults N = 294; juveniles N = 232) and hooded (adults N = 118; juveniles N = 38) seals to test hypotheses about sources of intrinsic (age and sex) and extrinsic (geographic location, season, year) variations in diets. A significant difference in FA profiles suggested dietary segregation between species. We found significant effects of sex and age class on FA profiles, with these being more pronounced in the highly size-dimorphic hooded seals than in harp seals. FA profiles of both species also varied between inshore and offshore sampling locations and between prebreeding and postbreeding periods. Finally, FA profiles of harp seals differed among years, which was coincident with large changes in prey distribution and availability in the mid-1990s.

scholarly journals Can heat waves change the trophic role of the world’s most invasive crayfish? Diet shifts in Procambarus clarkii

PLoS ONE ◽  
2017 ◽  
Vol 12 (9) ◽  
pp. e0183108 ◽  
Author(s):  
Bruno M. Carreira ◽  
Pedro Segurado ◽  
Anssi Laurila ◽  
Rui Rebelo
Keyword(s):  
Procambarus Clarkii ◽  
Heat Waves ◽  
Invasive Crayfish ◽  
Diet Shifts ◽  
Trophic Role

Intensive trapping and increased fish predation cause massive population decline of an invasive crayfish

2007 ◽  
Vol 52 (6) ◽  
pp. 1134-1146 ◽  
Author(s):  
CATHERINE L. HEIN ◽  
M. JAKE VANDER ZANDEN ◽  
JOHN J. MAGNUSON
Keyword(s):  
Population Decline ◽  
Fish Predation ◽  
Invasive Crayfish

scholarly journals Using eDNA to detect the distribution and density of invasive crayfish in the Honghe-Hani rice terrace World Heritage site

PLoS ONE ◽  
2017 ◽  
Vol 12 (5) ◽  
pp. e0177724 ◽  
Author(s):  
Wang Cai ◽  
Zhuxin Ma ◽  
Chunyan Yang ◽  
Lin Wang ◽  
Wenzhi Wang ◽  
...  
Keyword(s):  
World Heritage ◽  
World Heritage Site ◽  
Heritage Site ◽  
Invasive Crayfish
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