Size of anal papillae in chironomids :Does it their salinity stress?

Ben Kefford, Kasturi Reddy-Lopata, Colin Clay, Tarah Hagen, Orsolya Parkanyi

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Salinity of inland waters is affected by a range of human activities and is regarded as a majo renvironmental contaminant in many parts of the world. Changes in salinity are well known to be associated with changes in macroinvertebrate communities of flowing waters. However, as many environmental factors co-vary with salinity, it is not known whether, and if so how, salinity causes communities to change. Being able to measure the osmoregulatory stress that individual stream macroinvertebrates are experiencing would be useful to understand if and how salinity affects their populations and thus communities. Additionally, inferring salinity stress in individual invertebrates could provide a valuable biomonitoring tool to detect the initial effects of salinity before major ecological changes have occurred. Osmoregulationin larval Chironomidae(Diptera)takes place in the anal papillae and their size is believed to be associated with latorystress. In two laboratory experiments and a field survey in southern Victoria, Australia, we determine if the size of the anal papillae of larva chironomids is a useful biomarker of salinity stress. Experiments with Chironomus oppositus showed that the surface area of the anal papillae was similar in larva hatched across 5 egg masses collected from 3 sites but were affected by salinity treatments. Furthermore, the(transformed)ratio of this surface area to the body length of the larva was independent of the size of C. oppositus. However,for Chironomus cloacalis, this surface area differed between larva hatched from egg masses collected from the same site. The expected trend in surface area of the anal papillae relative to the size of larva (Chironomu alternans, C. cloacalis, Dicrotendipes sp., Criptochironomus sp. and Tanypodinae)was not duplicated in the field survey. It would appear that unknown factors, other than salinity, are affecting the size of the anal papillae of chironomids in southern Victoria.
    Original languageEnglish
    Pages (from-to)96-106
    Number of pages11
    JournalLimnologica
    Volume41
    DOIs
    Publication statusPublished - 2011

    Fingerprint

    Chironomidae
    salt stress
    salinity
    surface area
    Victoria (Australia)
    larvae
    larva
    Chironomus
    macroinvertebrates
    egg masses
    Dicrotendipes
    macroinvertebrate
    field survey
    inland waters
    egg
    body length
    biomonitoring
    biomarkers
    invertebrates
    biomarker

    Cite this

    Kefford, Ben ; Reddy-Lopata, Kasturi ; Clay, Colin ; Hagen, Tarah ; Parkanyi, Orsolya. / Size of anal papillae in chironomids :Does it their salinity stress?. In: Limnologica. 2011 ; Vol. 41. pp. 96-106.
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    abstract = "Salinity of inland waters is affected by a range of human activities and is regarded as a majo renvironmental contaminant in many parts of the world. Changes in salinity are well known to be associated with changes in macroinvertebrate communities of flowing waters. However, as many environmental factors co-vary with salinity, it is not known whether, and if so how, salinity causes communities to change. Being able to measure the osmoregulatory stress that individual stream macroinvertebrates are experiencing would be useful to understand if and how salinity affects their populations and thus communities. Additionally, inferring salinity stress in individual invertebrates could provide a valuable biomonitoring tool to detect the initial effects of salinity before major ecological changes have occurred. Osmoregulationin larval Chironomidae(Diptera)takes place in the anal papillae and their size is believed to be associated with latorystress. In two laboratory experiments and a field survey in southern Victoria, Australia, we determine if the size of the anal papillae of larva chironomids is a useful biomarker of salinity stress. Experiments with Chironomus oppositus showed that the surface area of the anal papillae was similar in larva hatched across 5 egg masses collected from 3 sites but were affected by salinity treatments. Furthermore, the(transformed)ratio of this surface area to the body length of the larva was independent of the size of C. oppositus. However,for Chironomus cloacalis, this surface area differed between larva hatched from egg masses collected from the same site. The expected trend in surface area of the anal papillae relative to the size of larva (Chironomu alternans, C. cloacalis, Dicrotendipes sp., Criptochironomus sp. and Tanypodinae)was not duplicated in the field survey. It would appear that unknown factors, other than salinity, are affecting the size of the anal papillae of chironomids in southern Victoria.",
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    author = "Ben Kefford and Kasturi Reddy-Lopata and Colin Clay and Tarah Hagen and Orsolya Parkanyi",
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    Size of anal papillae in chironomids :Does it their salinity stress? / Kefford, Ben; Reddy-Lopata, Kasturi; Clay, Colin; Hagen, Tarah; Parkanyi, Orsolya.

    In: Limnologica, Vol. 41, 2011, p. 96-106.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Size of anal papillae in chironomids :Does it their salinity stress?

    AU - Kefford, Ben

    AU - Reddy-Lopata, Kasturi

    AU - Clay, Colin

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    AU - Parkanyi, Orsolya

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    AB - Salinity of inland waters is affected by a range of human activities and is regarded as a majo renvironmental contaminant in many parts of the world. Changes in salinity are well known to be associated with changes in macroinvertebrate communities of flowing waters. However, as many environmental factors co-vary with salinity, it is not known whether, and if so how, salinity causes communities to change. Being able to measure the osmoregulatory stress that individual stream macroinvertebrates are experiencing would be useful to understand if and how salinity affects their populations and thus communities. Additionally, inferring salinity stress in individual invertebrates could provide a valuable biomonitoring tool to detect the initial effects of salinity before major ecological changes have occurred. Osmoregulationin larval Chironomidae(Diptera)takes place in the anal papillae and their size is believed to be associated with latorystress. In two laboratory experiments and a field survey in southern Victoria, Australia, we determine if the size of the anal papillae of larva chironomids is a useful biomarker of salinity stress. Experiments with Chironomus oppositus showed that the surface area of the anal papillae was similar in larva hatched across 5 egg masses collected from 3 sites but were affected by salinity treatments. Furthermore, the(transformed)ratio of this surface area to the body length of the larva was independent of the size of C. oppositus. However,for Chironomus cloacalis, this surface area differed between larva hatched from egg masses collected from the same site. The expected trend in surface area of the anal papillae relative to the size of larva (Chironomu alternans, C. cloacalis, Dicrotendipes sp., Criptochironomus sp. and Tanypodinae)was not duplicated in the field survey. It would appear that unknown factors, other than salinity, are affecting the size of the anal papillae of chironomids in southern Victoria.

    KW - Salinization

    KW - Anal papillae

    KW - Chloride cells

    KW - Mitochondria-rich cells

    KW - Chloride epithelia

    KW - Biomarkers

    KW - Chironomidae

    KW - Diptera

    KW - Stream invertebrates.

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    DO - 10.1016/j.limno.2010.09.004

    M3 - Article

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    EP - 106

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    JF - Limnologica

    SN - 0075-9511

    ER -