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Impaired crypsis of fish infected with a trophically transmitted parasite
Trophically transmitted parasites may enhance their transmission by altering the phenotype of infected hosts to increase their vulnerability to predation by the next hosts in the life cycle. In an experimental study, we investigated whether the parasite Diplostomum spathaceum (Trematoda) alters cryp...
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| Published in: | Animal behaviour 2005-10, Vol.70 (4), p.895-900 |
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| Format: | Article |
| Language: | English |
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| cites | cdi_FETCH-LOGICAL-c397t-fd94f5146f871a9d9e21d77cbd2830bb27667e06005da61e53f802183b12d66e3 |
| container_end_page | 900 |
| container_issue | 4 |
| container_start_page | 895 |
| container_title | Animal behaviour |
| container_volume | 70 |
| creator | Seppälä, Otto Karvonen, Anssi Valtonen, E. Tellervo |
| description | Trophically transmitted parasites may enhance their transmission by altering the phenotype of infected hosts to increase their vulnerability to predation by the next hosts in the life cycle. In an experimental study, we investigated whether the parasite
Diplostomum spathaceum (Trematoda) alters cryptic coloration and cryptic behaviour of infected rainbow trout,
Oncorhynchus mykiss, so that they would be more conspicuous to avian predators. The parasite reduces the vision of fish by lodging in the eyes and inducing cataract formation, which gives it an opportunity to affect fish crypsis. We examined the effect of the parasite on the ability of fish to adjust their coloration to the environment and on the preference of fish for different backgrounds. When maintained against a black substrate coloration, the colour of both infected and control fish closely matched that of the environment. However, in lighter environments, the contrast between fish and background coloration increased, especially in infected fish, which were darker than control fish. Furthermore, when given a choice between black and white substrates, the preference of infected fish for the dark background, where the fish were least conspicuous, was reduced compared to that of controls. These results indicate that
D. spathaceum eye flukes impair crypsis of fish which is one potential mechanism predisposing them to predation by bird hosts. |
| doi_str_mv | 10.1016/j.anbehav.2005.01.021 |
| format | article |
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Diplostomum spathaceum (Trematoda) alters cryptic coloration and cryptic behaviour of infected rainbow trout,
Oncorhynchus mykiss, so that they would be more conspicuous to avian predators. The parasite reduces the vision of fish by lodging in the eyes and inducing cataract formation, which gives it an opportunity to affect fish crypsis. We examined the effect of the parasite on the ability of fish to adjust their coloration to the environment and on the preference of fish for different backgrounds. When maintained against a black substrate coloration, the colour of both infected and control fish closely matched that of the environment. However, in lighter environments, the contrast between fish and background coloration increased, especially in infected fish, which were darker than control fish. Furthermore, when given a choice between black and white substrates, the preference of infected fish for the dark background, where the fish were least conspicuous, was reduced compared to that of controls. These results indicate that
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Diplostomum spathaceum (Trematoda) alters cryptic coloration and cryptic behaviour of infected rainbow trout,
Oncorhynchus mykiss, so that they would be more conspicuous to avian predators. The parasite reduces the vision of fish by lodging in the eyes and inducing cataract formation, which gives it an opportunity to affect fish crypsis. We examined the effect of the parasite on the ability of fish to adjust their coloration to the environment and on the preference of fish for different backgrounds. When maintained against a black substrate coloration, the colour of both infected and control fish closely matched that of the environment. However, in lighter environments, the contrast between fish and background coloration increased, especially in infected fish, which were darker than control fish. Furthermore, when given a choice between black and white substrates, the preference of infected fish for the dark background, where the fish were least conspicuous, was reduced compared to that of controls. These results indicate that
D. spathaceum eye flukes impair crypsis of fish which is one potential mechanism predisposing them to predation by bird hosts.</description><subject>Agnatha and pisces</subject><subject>Animal behavior</subject><subject>Animal ethology</subject><subject>Biological and medical sciences</subject><subject>Diplostomum spathaceum</subject><subject>Eyes & eyesight</subject><subject>Fish</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Marine</subject><subject>Oncorhynchus mykiss</subject><subject>Parasites</subject><subject>Predation</subject><subject>Psychology. Psychoanalysis. Psychiatry</subject><subject>Spathaceum</subject><subject>Trematoda</subject><subject>Vertebrata</subject><issn>0003-3472</issn><issn>1095-8282</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNqFkEtLxDAQgIMouD5-glAEvbVO0iZpTyLiY2HBi55DmkzYLN22Jl1l_71ZdkHw4ikT5pvXR8gVhYICFXerQvctLvVXwQB4AbQARo_IjELD85rV7JjMAKDMy0qyU3IW4yp9BQc-I_P5etQ-oM1M2I7Rx2xwmfNxmfneoZlS4ttPy0xnUxjGpTe667Yp1n1c-2mXHnXQ0U94QU6c7iJeHt5z8vH89P74mi_eXuaPD4vclI2ccmebynFaCVdLqhvbIKNWStNaVpfQtkwKIRFEusRqQZGXrk7n1GVLmRUCy3Nyu-87huFzg3FSax8Ndp3ucdhERWUFXECVwOs_4GrYhD7tphirOAfGywTxPWTCEGNAp8bg1zpsFQW1s6tW6mBX7ewqoCqtk-puDs11TE5cEmJ8_C2WtJEgReLu9xwmJV8eg4rGY2_QJulmUnbw_0z6AYDcka0</recordid><startdate>20051001</startdate><enddate>20051001</enddate><creator>Seppälä, Otto</creator><creator>Karvonen, Anssi</creator><creator>Valtonen, E. Tellervo</creator><general>Elsevier Ltd</general><general>Elsevier</general><general>Harcourt Brace Jovanovich Ltd</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7SN</scope><scope>7SS</scope><scope>7U7</scope><scope>C1K</scope><scope>7TN</scope><scope>F1W</scope><scope>H95</scope><scope>L.G</scope></search><sort><creationdate>20051001</creationdate><title>Impaired crypsis of fish infected with a trophically transmitted parasite</title><author>Seppälä, Otto ; Karvonen, Anssi ; Valtonen, E. Tellervo</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c397t-fd94f5146f871a9d9e21d77cbd2830bb27667e06005da61e53f802183b12d66e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Agnatha and pisces</topic><topic>Animal behavior</topic><topic>Animal ethology</topic><topic>Biological and medical sciences</topic><topic>Diplostomum spathaceum</topic><topic>Eyes & eyesight</topic><topic>Fish</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Marine</topic><topic>Oncorhynchus mykiss</topic><topic>Parasites</topic><topic>Predation</topic><topic>Psychology. Psychoanalysis. Psychiatry</topic><topic>Spathaceum</topic><topic>Trematoda</topic><topic>Vertebrata</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Seppälä, Otto</creatorcontrib><creatorcontrib>Karvonen, Anssi</creatorcontrib><creatorcontrib>Valtonen, E. Tellervo</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Toxicology Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 1: Biological Sciences & Living Resources</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Animal behaviour</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Seppälä, Otto</au><au>Karvonen, Anssi</au><au>Valtonen, E. Tellervo</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Impaired crypsis of fish infected with a trophically transmitted parasite</atitle><jtitle>Animal behaviour</jtitle><date>2005-10-01</date><risdate>2005</risdate><volume>70</volume><issue>4</issue><spage>895</spage><epage>900</epage><pages>895-900</pages><issn>0003-3472</issn><eissn>1095-8282</eissn><coden>ANBEA8</coden><abstract>Trophically transmitted parasites may enhance their transmission by altering the phenotype of infected hosts to increase their vulnerability to predation by the next hosts in the life cycle. In an experimental study, we investigated whether the parasite
Diplostomum spathaceum (Trematoda) alters cryptic coloration and cryptic behaviour of infected rainbow trout,
Oncorhynchus mykiss, so that they would be more conspicuous to avian predators. The parasite reduces the vision of fish by lodging in the eyes and inducing cataract formation, which gives it an opportunity to affect fish crypsis. We examined the effect of the parasite on the ability of fish to adjust their coloration to the environment and on the preference of fish for different backgrounds. When maintained against a black substrate coloration, the colour of both infected and control fish closely matched that of the environment. However, in lighter environments, the contrast between fish and background coloration increased, especially in infected fish, which were darker than control fish. Furthermore, when given a choice between black and white substrates, the preference of infected fish for the dark background, where the fish were least conspicuous, was reduced compared to that of controls. These results indicate that
D. spathaceum eye flukes impair crypsis of fish which is one potential mechanism predisposing them to predation by bird hosts.</abstract><cop>Kent</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.anbehav.2005.01.021</doi><tpages>6</tpages></addata></record> |
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| ispartof | Animal behaviour, 2005-10, Vol.70 (4), p.895-900 |
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| language | eng |
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| source | ScienceDirect Freedom Collection 2022-2024 |
| subjects | Agnatha and pisces Animal behavior Animal ethology Biological and medical sciences Diplostomum spathaceum Eyes & eyesight Fish Fundamental and applied biological sciences. Psychology Marine Oncorhynchus mykiss Parasites Predation Psychology. Psychoanalysis. Psychiatry Spathaceum Trematoda Vertebrata |
| title | Impaired crypsis of fish infected with a trophically transmitted parasite |
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