Habitat partitioning among three predatory fish in a temperate reservoir

The authors of the article have studied the content of the elements of anti-oxidant system (malondialdehyde, catalase, selenium) in tissues of the internal organs (gills, intestine, muscles, liver, swimbladder, scales) in some species of predatory fish (pike Esox lucius (L., 1758), perch Perca fluviatilis (L., 1758), pike-perch Sander lucioperca (L., 1758), catfish Silurus glanis ) widespread in the basin of the Volga river in the Saratov region. The lowest concentration of malondialdehyde in organisms of the studied fish species is observed in fall and winter; the highest - in spring and summer. Catalase activity in gills tissue of a pike raised in 11.8%, cat-fish - 9.1%, pike-perch - 7.5%, perch - 7.8%. In fall (compared to winter) enzyme activity lowering in gonads of pike-perch makes 16.3%, in gonads of perch - 14.4%. In other tissues there were not observed any evident changes of catalase activity. Fish species under consideration are listed according to the average value of selenium concentration in organisms, µg/g: pike (0.208) > catfish (0.207) > pike-perch (0.196) > perch (0.178). According to the average value of the selenium accumulation in the body in different season all the studied species can be placed in the following order, µg/g: winter-pike (0.132) > pike-perch (0.136) > perch and catfish (0.142); spring - pike-perch (0.190) > perch (0.191) > pike (0.208) > catfish (0.209); summer - perch (0.186) > pike-perch (0.190) > catfish and pike (0.203); autumn - perch (0.193) > pike-perch (0.268) > > catfish (0.274) > pike (0.289).

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Faculty Opinions recommendation of Declines in predatory fish promote bloom-forming macroalgae.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1168367.630544 ◽

2009 ◽

Author(s):

Boris Worm

Keyword(s):

Predatory Fish

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Faculty Opinions recommendation of Taste-mediated behavioral and electrophysiological responses by the predatory fish Ariopsis felis to deterrent pigments from Aplysia californica ink.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.13446957.14822056 ◽

2012 ◽

Author(s):

Thomas Finger

Keyword(s):

Aplysia Californica ◽

Predatory Fish ◽

Electrophysiological Responses

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Distribution of rorquals and Atlantic cod in relation to their prey in the Norwegian high Arctic

Polar Biology ◽

10.1007/s00300-021-02835-2 ◽

2021 ◽

Author(s):

Hiroko K. Solvang ◽

Tore Haug ◽

Tor Knutsen ◽

Harald Gjøsæter ◽

Bjarte Bogstad ◽

...

Keyword(s):

Prey Species ◽

Barents Sea ◽

Atlantic Cod ◽

Spatial Association ◽

High Arctic ◽

Humpback Whales ◽

Predatory Fish ◽

Detection Range ◽

Minke Whales ◽

Acoustic Methods

AbstractRecent warming in the Barents Sea has led to changes in the spatial distribution of both zooplankton and fish, with boreal communities expanding northwards. A similar northward expansion has been observed in several rorqual species that migrate into northern waters to take advantage of high summer productivity, hence feeding opportunities. Based on ecosystem surveys conducted during August–September in 2014–2017, we investigated the spatial associations among the three rorqual species of blue, fin, and common minke whales, the predatory fish Atlantic cod, and their main prey groups (zooplankton, 0-group fish, Atlantic cod, and capelin) in Arctic Ocean waters to the west and north of Svalbard. During the surveys, whale sightings were recorded by dedicated whale observers on the bridge of the vessel, whereas the distribution and abundance of cod and prey species were assessed using trawling and acoustic methods. Based on existing knowledge on the dive habits of these rorquals, we divided our analyses into two depth regions: the upper 200 m of the water column and waters below 200 m. Since humpback whales were absent in the area in 2016 and 2017, they were not included in the subsequent analyses of spatial association. No association or spatial overlap between fin and blue whales and any of the prey species investigated was found, while associations and overlaps were found between minke whales and zooplankton/0-group fish in the upper 200 m and between minke whales and Atlantic cod at depths below 200 m. A prey detection range of more than 10 km was suggested for minke whales in the upper water layers.

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A benthic predatory fish does not cause selection on armour traits in three-spined stickleback Gasterosteus aculeatus (Gasterosteiformes: Gasterosteidae)

Biological Journal of the Linnean Society ◽

10.1111/j.1095-8312.2011.01759.x ◽

2011 ◽

Vol 104 (4) ◽

pp. 877-885 ◽

Cited By ~ 4

Author(s):

ANDREW D. C. MACCOLL ◽

SONIA M. CHAPMAN

Keyword(s):

Gasterosteus Aculeatus ◽

Predatory Fish

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Habitat Partitioning among Developmental Stages of Waterstriders (Heteroptera: Gerridae)

Oikos ◽

10.2307/3544394 ◽

1984 ◽

Vol 42 (3) ◽

pp. 267 ◽

Cited By ~ 10

Author(s):

Matti Nummelin ◽

Kari Vepsäläinen ◽

John R. Spence ◽

Kari Vepsalainen

Keyword(s):

Developmental Stages ◽

Habitat Partitioning

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

Australian Journal of Zoology ◽

10.1071/zo06011 ◽

2006 ◽

Vol 54 (6) ◽

pp. 399 ◽

Cited By ~ 3

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.

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