The developmental stages of<i>Gladioferens pectinatus</i>(Brady, 1899) (Copepoda: Calanoida)

McKinnon, A. David; Arnott, GH

doi:10.1080/00288330.1985.9516072

Cited by 12 publications

(7 citation statements)

References 14 publications

(13 reference statements)

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“…This characteristic noticeably differs not only from B. poopoensis and G. pectinatus but also from other centropagid species (Chapman & Burns, 1976;McKinnon & Arnott, 1985). Six segments is characteristic in this stage, as in the first, all pre-and postmasticatory appendages are present.…”

Section: Discussionmentioning

confidence: 64%

“…The identification of the postembryonic stages was done according to the characteristics established for copepod calanoids (Fairbridge, 1945;Ravera, 1953;Cicchino, 1972;Navarro-Cipólli, 1973;Chapman & Burns, 1976;Pires de Gouvéa, 1980;McKinnon & Arnott, 1985). In all cases, dissections of at least ten specimens per stage were performed.…”

Section: Obtention Of Boeckella Poopoensis Populationmentioning

confidence: 99%

“…All schemes were carried out using the microphotographies of the postembryonic stages and their different appendages and through comparisons with the studies conducted by Fairbridge (1945), Ravera (1953), Cicchino (1972), Navarro Cipólli (1973, Chapman & Burns (1976), Pires de Gouvéa (1980), McKinnon & Arnott (1985) and Huys & Boxshall (1991).…”

Section: Obtention Of Boeckella Poopoensis Populationmentioning

confidence: 99%

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Description of the postembryonic stages of Boeckella poopoensis (Crustacea, Copepoda, Centropagidae)

Cabrera

Vignatti

Echaniz

et al. 2018

Iheringia, Sér. Zool.

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ABSTRACT. Boeckella poopoensis Marsh, 1906 is one of the most common copepods in the saline lakes of South America, where generally is the species that greater contributes to the zooplankton community biomass. Despite of its wide geographic distribution and ecological importance, the characteristics of the postembryonic stages are unknown, which prevents a detailed understanding of the structure and dynamics of natural populations. The objective of this work was to describe the morphology of the postembryonic stages and to compare it with other species of Centropagidae. The specimens were obtained from a monospecific culture acclimatized in the laboratory. The lineage comes from El Carancho shallow lake (65°03'W, 37°27'S). The identification of the postembryonic stages was performed according to the characteristics established for copepod calanoids. Based in all developing stages, some characteristics that distinguish B. poopoensis from another species of the genus are: lobes of nauplii with the same number of setae of equal length; beginning of body segmentation from nauplii III; sexual dimorphism from copepodite IV (although only evident in the V leg); the endopod of the V leg of copepodites V males and females are biarticulate, but while females endopod add setae respect to the previous stage, males endopod lose them and remain glabrous as in the adults. Copepodites V do not present characteristics typical of adults, such as, the most developed thoracic left wing of females and in the geniculate right antenna of males. All stages of B. poopoensis are larger than those corresponding to other species of centropagids, and in the immature stages, the appendages show their own patterns of setae and have a slightly smaller number of setae than that of the other species of the family.KEYWORDS. Calanoid copepods, Neotropical centropagids, nauplii larvae, copepodite stages. RESUMEN. Descripción de los estadios postembrionarios de Boeckella poopoensis (Crustacea, Copepoda, Centropagidae). Boeckella poopoensisMarsh, 1906 es uno de los copépodos más frecuentes en el zooplancton de los lagos salinos sudamericanos, donde generalmente es la especie que más contribuye a la biomasa de la comunidad zooplanctónica. A pesar de su amplia distribución geográfica y su importancia ecológica, las características que distinguen sus estadios postembrionarios no son conocidas, lo que no permite conocer detalladamente la estructura y dinámica de sus poblacionales naturales. El objetivo de este trabajo fue describir la morfología de los estadios postembrionarios y compararlos con los de otras especies de Centropagidae. Los especímenes estudiados fueron obtenidos de un cultivo monoespecífico aclimatado en laboratorio. El linaje proviene del lago El Carancho (65°03'W, 37º27'S). La identificación de los estadios se hizo de acuerdo a los caracteres establecidos para los copépodos calanoideos. En base a todos los estados de desarrollo, algunas de las características que distinguen a B. poopoensis de otras especies del género son: lóbulos de l...

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Section: Discussionmentioning

confidence: 64%

Section: Obtention Of Boeckella Poopoensis Populationmentioning

confidence: 99%

Section: Obtention Of Boeckella Poopoensis Populationmentioning

confidence: 99%

See 1 more Smart Citation

Description of the postembryonic stages of Boeckella poopoensis (Crustacea, Copepoda, Centropagidae)

Cabrera

Vignatti

Echaniz

et al. 2018

Iheringia, Sér. Zool.

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“…Its geographic range expands from silty sediments in the Houhora Harbour (North Island), to silty muddy sediments in Portobello Bay in the Otago Harbour (South Island). Gladioferens pectinatus (Bayly 1963) is a pelagic species of calanoid copepod commonly found in New Zealand, Australia and Tasmania (McKinnon & Arnott 1985).…”

Section: Test Speciesmentioning

confidence: 99%

Peer Review #1 of "Assessment of the ecotoxicity of urban estuarine sediment using benthic and pelagic copepod bioassays (v0.1)"

2018

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Urban estuarine sediments are sinks to a range of contaminants of anthropogenic origin, and a key challenge is to characterize the risk of these compounds to receiving environments. In this study, the toxicity of urban estuarine sediments was tested using acute and chronic bioassays in the benthic harpacticoid Quinquelaophonte sp., and in the planktonic calanoid Gladioferens pectinatus, two New Zealand copepod species. The sediment samples from the estuary tributary sites significantly impacted reproduction in Quinquelaophonte sp. However, results from one of the estuary sites were not significantly different to those from the tributaries sites, suggesting that chemicals other than trace metals, polycyclic aromatic hydrocarbons and ammonia may be the causative stressors.Sediment elutriate samples had significant effects on reproductive endpoints in G.pectinatus, and on the induction of DNA damage in cells, as shown by the comet assay.The results indicate that sediment contamination at the Ahuriri Estuary has the potential to impact biological processes of benthic and pelagic organisms. The approach used provides a standardised methodology to assess the toxicity of estuarine sediments.PeerJ reviewing PDF |

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“…Freshwater discharge can contribute to low pH water during high flows or wash up acid‐sulphate soils into the Coorong, therefore acidifying the system (Fitzpatrick et al ). Here, we study Gladioferens pectinatus , a euryhaline copepod species commonly encountered in south‐eastern Australia and New Zealand estuaries (Bayly ; McKinnon and Arnott ; Hall and Burns ). It is a pioneer herbivore that often recolonizes fresh or brackish aquatic systems that have been anthropogenically or naturally modified in terms of water quality and water flow, and plays an important functional role in estuarine systems (Roennfeldt ).…”

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confidence: 99%

A combination of salinity and pH affects the recruitment of Gladioferens pectinatus (Brady) (Copepoda; Calanoida)

Hemraj

Allais

Leterme

2017

Limnology & Oceanography

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Carbon dioxide levels in many estuaries fluctuate and, in several cases, reach extremes much higher than those predicted for oceans by the end of the century. Moreover, estuaries are characterized by natural fluctuations in salinity, and reduced pH, from increased pCO 2 , exposes estuarine organisms to multiple stresses. Although the effects of low pH on the reproduction of several marine copepod species have been assessed, studies examining effects of pH in estuarine copepod species are extremely scarce. Here, we aim at understanding the reproductive response of Gladioferens pectinatus to the stress posed by both salinity and pH. G. pectinatus was exposed to salinities 2 and 10, at four different pH levels each. Our results show no impairment in the brood size, embryonic development time and hatching success under low pH levels at either salinities. However, at salinity 2, the percentage of nauplii growing into adults significantly decreased at low pH, whereas at salinity 10, no major effect was observed. We argue that the combination of osmoregulation and acidity induced stress response can affect the development of nauplii and copepodites, as well as adult recruitment, likely due to energy reallocation and molting impairment. We also argue that resilience and phenotypic plasticity highly influence the ability of different copepod species and populations to reproduce and grow under stressful combinations of environmental parameters. This study points out the importance of understanding the effects of multiple stresses or parameters on the adaptability of organisms to water acidification.

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The developmental stages ofGladioferens pectinatus(Brady, 1899) (Copepoda: Calanoida)

Cited by 12 publications

References 14 publications

Description of the postembryonic stages of Boeckella poopoensis (Crustacea, Copepoda, Centropagidae)

Description of the postembryonic stages of Boeckella poopoensis (Crustacea, Copepoda, Centropagidae)

Peer Review #1 of "Assessment of the ecotoxicity of urban estuarine sediment using benthic and pelagic copepod bioassays (v0.1)"

A combination of salinity and pH affects the recruitment of Gladioferens pectinatus (Brady) (Copepoda; Calanoida)

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