Trophic relationships between the large scyphomedusa Chrysaora plocamia and the parasitic amphipod Hyperia curticephala

Riascos, José M.; Docmac, Felipe; Reddin, Carl J.; Harrod, Chris

doi:10.1007/s00227-015-2716-7

Cited by 18 publications

(6 citation statements)

References 45 publications

(63 reference statements)

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“…Low variation in stable isotope composition of parasites collected from the Vaal River can be related to the fact that parasites do not change the resources they utilise from the host and rather spatial differences in parasite stable isotope enrichment is related to the variance in host diet. This was similarly observed by Riascos et al[56] for Hyperia curticephala infecting the scyphomedusa, Chrysaora plocamia. It should also be noted that unevenness of the prevalence and abundance of parasites along the Vaal River likely lead to a lopsided sampling design and as such spatial differences in parasite stable isotope enrichment observed in the present study should be confirmed following more even sample collection.Comparison between the parasites infecting C. gariepinus showed that L. clariae were significantly and constantly enriched in15 N stable isotope compared to the endoparasites.…”

supporting

confidence: 79%

Stable isotope analysis spills the beans about spatial variance in trophic structure in a fish host – parasite system from the Vaal River System, South Africa

Gilbert

Nachev

Jochmann

et al. 2019

Preprint

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BackgroundStable isotope analysis offers a unique tool for comparing trophic interactions and food web architecture in ecosystems. This approach is based on analysis of the stable isotope ratios of carbon (13 C/ 12 C) and nitrogen (15 N/ 14 N) in organisms. Studies comparing stable isotope enrichment in hosts and parasites have shown that parasites are variably enriched in stable isotopes relative to the host.MethodsSharptooth catfish (Clarias gariepinus) were collected from six sites along the Vaal River, South Africa and were assessed for ectoparasites and endoparasites. Lamproglena clariae (Copepoda), Tetracampus ciliotheca and Proteocephalus glanduligerus (Cestoda), and larval Contracaecum sp. (Nematoda) were collected from the gills, intestine and mesenteries, respectively. Signatures of δ 13 C and δ 15 N were analysed in host muscle tissue and parasites using bulk stable isotope analysis.ResultsStable isotope enrichment was variable between parasites and the host fish, with L. clariae and the host sharing similar δ 15 N signatures and the endoparasites being depleted in both δ 13 C and δ 15 N relative to the host. Spatial differences in enrichment of stable isotopes were also identified. Fish and parasites collected from below the Vaal River Barrage were more enriched in the 15 N isotope than hosts and parasites collected from other sites. The opposite was identified for 13 C isotope fractionation.ConclusionDifferences in stable isotope enrichment in parasites infecting C. gariepinus could be related to the feeding strategy of each parasite species collected. Enrichment of δ 15 N in L. clariae would relate to the micropredatory nature of this parasite, which feeds on whole blood of the host fish. Depleted isotope levels in endoparasites could relate to their absorptive feeding strategy on metabolic by-products of the host. Spatial differences in both host and parasite tissues identified likely resulted from differences in the diet of the host and related with availability of prey items for the host fish.

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supporting

confidence: 79%

Stable isotope analysis spills the beans about spatial variance in trophic structure in a fish host – parasite system from the Vaal River System, South Africa

Gilbert

Nachev

Jochmann

et al. 2019

Preprint

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“…After four necropsies performed on fresh specimens (1987, 2012, 2014, and 2019), we determined, in the stomach contents and all cases, that the Scyphozoan y en todos los casos, que la medusa Scyphozoa C. plocamia constituía más del 95% de la Frecuencia de Ocurrencia (>95% FO); también se encontró líquido viscoso con importantes cantidades del anfípodo hyperido Hyperia curticephala, especie asociada a C. plocamia por el fuerte micro-comensalismo que ejerce en la mencionada medusa (Riascos et al, 2015).…”

Section: Encuestasunclassified

Recopilación histórica de las captura de laúd (Dermochelys coriacea) en Perú y su relación con la medusa Scyphozoa Chrysaora plocamia

2021

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Se realizó seguimiento de capturas de tortuga laúd (Dermochelys coriacea) por la flota agallera tortuguera del puerto de San Andrés-Pisco (13°45’S, 76°13’W) en la costa centro sur del Perú, durante el fenómeno El Niño (EN) 1987. Se analizó biometría, necropsias, determinación de abundancias de medusas Scyphozoa y encuestas a pescadores artesanales de Pisco. Se registró 34 tortugas laúd capturadas con talla promedio 117,3 ±10,2 cm Largo Curvo de Caparazón (LCC) (rango: 100 - 140 cm, n=22), de las cuales 77,3% fueron juveniles y 22,7% subadultos. Existe fuerte correlación significativa (Rho Spearman = 0,883 al 99%) entrecapturas de laúd y presencia de medusa Scyphozoa Chrysaora plocamia a escalas mensuales. Durante ese año se presentó mayor abundancia de C. plocamia, registrándose hasta 12,4 kg medusa/1000m3 , promedio 4,4 ±4 kg medusa/1000m3, usando una serie de tiempo de más de 4 décadas (1972 - 2014). Como resultado de las encuestas se calculó la captura promedio de 15,9 ±13,4 (rango: 2 - 40, n=17) tortugas laúd por bote por mes, durante los años 1970’s y 1980’s, proyectándose una tasa de extracción de 572,4 laudes para 1987.Sin embargo, en los años 1990’s y 2000’s las capturas fueron 55 veces menores, con promedio de 0,29 ± 0,5 (rango: 0 - 1,5, n=21). La principal zona de pesca de laúd en los años 1980’s fue una zona continua costera (~40 km) de la playa Caucato (13°38’S, 76°12’W) hasta el norte de la playa Jahuay (13°19’S, 76°14’W) de 6 a 20 m de profundidad. Se propone una segregación ontogénica en la distribución espacial de la tortuga laúd frente a Perú, donde juveniles y subadultos se distribuyen en zonas costero neríticas, <30 mn distancia a la costa, probablemente influenciadas por la disponibilidad alimentaria representada por C. plocamia. Los adultos de tortuga laúd están mayormente distribuidos en zona pelágico oceánica (300 -1500 mn).

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“…The Juan Fernández archipelago is formed by the islands Alejandro Selkirk (33°45′S 80°45′W), Robinson Crusoe (33°40′S 78°50′W) and Santa Clara (33°42′S 79°00′ W), whereas the little known Desventuradas archipelago comprises the San Félix (25°15′S 80°07′W) and San Ambrosio (26°20′S 79°58′W) islands (Aguirre et al ., 2009); both archipelagos are surrounded by numerous seamounts. In the oceanic islands and seamount regions of the SEP, some studies on plankton have shown slight increments in phytoplankton biomass in nearby waters (Yáñez et al ., 2009; Von Dassow & Collado-Fabbri, 2014; Andrade et al ., 2014 a ) and high diversity (although low biomass) of zooplankton (Vinogradov, 1991; Robledo & Mujica, 1999; Palma & Silva, 2006; Frederick et al ., 2018; Fierro, 2019). The high biodiversity of zooplankton has been associated with ecological connectivity promoted by mesoscale activity, which allows the transport of plankton and nutrients from the highly productive coastal upwelling zone off Chile (Andrade et al ., 2012; Andrade et al ., 2014 b ).…”

Section: Introductionmentioning

confidence: 99%

The community structure of hyperiid amphipods associated with two seamount regions in the South-east Pacific

et al. 2021

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Oceanic islands and seamounts are considered biodiversity hotspots. Here, we present a taxonomy and community analyses of hyperiid amphipods collected near oceanic islands and over seamounts of the Juan Fernández Archipelago and Desventuradas Archipelago in the South-east Pacific. Both archipelagos are separated by about 800 km over the meridional gradient, suggesting the existence of different hyperiid communities because of apparent geographic isolation and distinctive oceanographic characteristics between regions. To test this hypothesis, zooplankton samples were collected from 19 stations during the CIMAR 22 ‘Oceanic Island’ cruise in October–November 2016. In total, 56 species of hyperiids were found, of which Phrosina semilunata, Lestrigonus schizogeneios, Hyperietta stephenseni, Hyperioides longipes, Phronimella elongata and Primno latreillei were the most abundant and recurrent species. The species richness (S), Shannon–Wiener diversity (H’) and dominance (D) of both the archipelagos were not significantly different. Additionally, except for a small group of rare species, the species composition was similar in both areas. Most species showed greater abundances than those observed in the coastal upwelling zone off Chile, whereas shared species between regions suggested the presence of a single biogeographic unit comprising the coastal transition zone and oceanic area off Chile within which both archipelagos are included. Correlation analysis indicated that salinity was the best predictor for the community structure, which provides evidence that the contributions of previously described water masses of the South-east Pacific may influence the spatial distribution and composition of the hyperiid community.

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Trophic relationships between the large scyphomedusa Chrysaora plocamia and the parasitic amphipod Hyperia curticephala

Cited by 18 publications

References 45 publications

Stable isotope analysis spills the beans about spatial variance in trophic structure in a fish host – parasite system from the Vaal River System, South Africa

Stable isotope analysis spills the beans about spatial variance in trophic structure in a fish host – parasite system from the Vaal River System, South Africa

Recopilación histórica de las captura de laúd (Dermochelys coriacea) en Perú y su relación con la medusa Scyphozoa Chrysaora plocamia

The community structure of hyperiid amphipods associated with two seamount regions in the South-east Pacific

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