Relevant bibliographies by topics / Appendicularians

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  1. Journal articles

Academic literature on the topic 'Appendicularians'

Author: Grafiati
Published: 20 February 2023

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Journal articles on the topic "Appendicularians"

1

Acuña, J. L., A. W. Bedo, R. P. Harris, and R. Anadón. "The Seasonal Succession of Appendicularians (Tunicata: Appendicularia) off Plymouth." Journal of the Marine Biological Association of the United Kingdom 75, no. 3 (1995): 755–58. http://dx.doi.org/10.1017/s0025315400039187.

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Earlier descriptions showed that the community of appendicularians off the British coast was mainly composed of Oikopleura dioica (Appendicularia; Müller, 1846) and Fritillaria borealis (Appendicularia; Lohmann, 1896), rarely by Oikopleura fusiformis (Appendicularia; Fol, 1872) and Fritillaria pellucida (Appendicularia; Quoy & Gaimard, 1833) and exceptionally by Oikopleura longicauda (Appendicularia; Vogt, 1854). Based on weekly samples collected during 1989 at a single station off the coast of Plymouth, we describe the first complete seasonal cycle of appendicularians in this area. The results suggest that rather than being occasional visitors, O. fusiformis, F. pellucida and O. longicauda are consistently present and abundant from mid to late summer. Moreover, the seasonal shifts in structure of the community of appendicularians in the area, as depicted by multivariate analysis, are consistent with those of the more southerly central Cantabrian coast (Spain). This suggests that they are viable populations rather than occasional expatriates from other areas.
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2

Corrales-Ugalde, Marco, Iván Castellanos-Osorio, and Álvaro Moráles-Ramírez. "Clave dicotómica para la identificación de Apendicularias en el PacíficoTropical Oriental y Mares Interamericanos, con un listado de especies para Costa Rica." Revista de Biología Tropical 66, no. 1-1 (2018): 108. http://dx.doi.org/10.15517/rbt.v66i1.33266.

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Although appendicularians are relevant primary consumers and are part of every zooplankton community, there is a lack of information on the species present in different ocean regions. Thus, regional identification guides are useful to develop datasets with high taxonomic resolution. Appendicularian species were identified in 33 epipelagic samples of zooplankton collected in several locations of Costarican waters. Eighteen appendicularian species were identified, of which 15 were found in the Pacific and only three in the Caribbean. Seven species are new records for Costa Rican Pacific waters (Appendicularia sicula, Fritillaria charybdae, F. cf. pacifica, F. tenella, F. pellucida f. omani, Oikoipleura fusiformis f. cornutogastra and Pelagopleura verticalis). Data for each species distribution in Costa Rica is presented together with a key for the identification of appendicularian species recorded in the Inter-American seas and the Eastern Tropical Pacific.
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3

Fenaux, Robert, Alain Bedo, and Gabriel Gorsky. "Premières données sur la dynamique d'une population d'Oikopleura dioica Fol, 1872 (Appendiculaire) en élevage." Canadian Journal of Zoology 64, no. 8 (1986): 1745–49. http://dx.doi.org/10.1139/z86-263.

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Several parameters that characterize a population arising from a single male–female pair of Oikopleura dioica Fol, 1872 (Appendicularia) were studied in our culture system. Egg volume varied by a factor of 1.4. Daily size of individuals in a population followed a Gaussian distribution, and the spread of this distribution increased with time. In a population that arose at 18 °C from 252 eggs, mortality reduced the number of individuals to 162 after 5 days. During the following 4 days, the appendicularians reached sexual maturity and died after gametes were released. The first individuals to mature were males, 115 h after fertilization. Average trunk sizes of mature animals are 942 ± 95 μm for males and 1165 ± 104 μm for females. All appendicularians released their gametes and died 215 h after fertilization. The number of eggs per female showed considerable variation, ranging between 41 and 362, with an average of 170 ± 78. Different causes for mortality during the entire life cycle are analysed.
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4

Savel’eva, A. V., E. N. Temereva, and S. Sh Dautov. "The organization of body cavity in appendicularians (Chordata: Appendicularia) is not typical of deuterostomia." Doklady Biological Sciences 448, no. 1 (2013): 41–44. http://dx.doi.org/10.1134/s0012496613010134.

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5

González, H. E., R. Giesecke, C. A. Vargas, et al. "Carbon cycling through the pelagic foodweb in the northern Humboldt Current off Chile (23°S)." ICES Journal of Marine Science 61, no. 4 (2004): 572–84. http://dx.doi.org/10.1016/j.icesjms.2004.03.021.

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Abstract The structure of the zooplankton foodweb and their dominant carbon fluxes were studied in the upwelling system off northern Chile (Mejillones Bay; 23°S) between October 2000 and December 2002. High primary production (PP) rates (1–8 gC m−2 d−1) were mostly due to the net-phytoplankton size fraction (>23 μm). High PP has been traditionally associated with the wind-driven upwelling fertilizing effect of equatorial subsurface waters, which favour development of a short food chain dominated by a few small clupeiform fish species. The objective of the present work was to study the trophic carbon flow through the first step of this “classical chain” (from phytoplankton to primary consumers such as copepods and euphausiids) and the carbon flow towards the gelatinous web composed of both filter-feeding and carnivorous zooplankton. To accomplish this objective, feeding experiments with copepods, appendicularians, ctenophores, and chaetognaths were conducted using naturally occurring plankton prey assemblages. Throughout the study, the total carbon ingestion rates showed that the dominant appendicularian species and small copepods consumed an average of 7 and 5 μgC ind−1 d−1, respectively. In addition, copepods ingested particles mainly in the size range of nano- and microplankton, whereas appendicularians ingested in the range of pico- and nanoplankton. Small copepods and appendicularians removed a small fraction of total daily PP (range 6–11%). However, when the pico- + nanoplankton fractions were the major contributors to total PP (oligotrophic conditions), grazing by small copepods increased markedly to 86% of total PP. Under these more oligotrophic conditions, the euphausiids grazing increased as well, but only reached values lower than 5% of total PP. During this study, chaetognaths and ctenophores ingested an average of 1 and 14 copepods ind−1 d−1, respectively. In terms of biomass consumed, the potential impact of carnivorous gelatinous zooplankton on the small-size copepod community (preferred prey) was important (2–12% of biomass removed daily). However, their impact produced more significant results on copepod abundance (up to 33%), which suggests that carnivorous gelatinous zooplankton may even modulate (control) the abundance of some species as well as the size structure of the copepod community.
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6

Carvalho, Pedro Freitas de, and Sérgio Luiz Costa Bonecker. "Seasonal and spatial variability of appendicularian density and taxonomic composition in the Caravelas Estuary (Northeastern Brazil) and adjacent coastal area." Brazilian Archives of Biology and Technology 53, no. 1 (2010): 161–69. http://dx.doi.org/10.1590/s1516-89132010000100020.

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This study aimed to identify and assess the seasonal and spatial variations of the appendicularians in the Caravelas River estuary and the adjacent coastal area. Samples were taken during 12 campaigns over five years (2001 and 2003-2006). Ten species were identified; the most abundant were Oikopleura dioica, Oikopleura rufescens, and Oikopleura longicauda. These species represented more than 95% of the total numbers of appendicularians. The remaining species were less frequent and occurred in low densities. The mean density of appendicularians found at the coastal stations (804 ind.m-3.) was higher than in the estuary (66 ind.m-3). However, the differences observed between the estuary and coastal stations were not significant (p=0.54). The samples taken during the dry season showed a higher mean density (587 ind.m-3) than in the rainy season (376 ind.m-3), and the differences between the seasons were statistically significant (p=0.004).
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7

Sato, R., Y. Tanaka, and T. Ishimaru. "Species-specific house productivity of appendicularians." Marine Ecology Progress Series 259 (2003): 163–72. http://dx.doi.org/10.3354/meps259163.

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8

Di Mauro, Rosana, Fabiana Capitanio, and María Delia Viñas. "Capture efficiency for small dominant mesozooplankters (Copepoda, Appendicularia) off Buenos Aires Province (34ºS-41ºS), Argentine Sea, using two plankton mesh sizes." Brazilian Journal of Oceanography 57, no. 3 (2009): 205–14. http://dx.doi.org/10.1590/s1679-87592009000300004.

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Two plankton mesh sizes of 67 µm and 220 µm were compared to evaluate their efficiency in the capture of the smallest copepods and appendicularians present in the Buenos Aires coastal area (Argentine Sea). A total of 12 copepod species and one appendicularian species were recorded in this study. The copepods were separated into 4 groups: harpacticoids, cyclopoids, small calanoids and large calanoids and their developmental stages. Among the cyclopoids, Oithona nana was the most abundant species, being 96.29 % underestimated by the 220 µm mesh, whereas Microsetella norvegica dominated the harpacticoids and was captured exclusively by the smaller mesh. Similar results were found for copepodites I-III of small calanoids, whose net sampled underestimation reached 99.70%. On the other hand, no significant difference between meshes was found for adults and copepodites IV-V of small calanoids or any of the developmental stages of large calanoids. A great loss of biomass was observed for O. nana when applying the larger mesh. In regards to the appendicularian Oikopleura dioica, all size ranges below 1,000 µm length were better estimated by the 67 µm mesh in terms of abundance and biomass. Our results clearly show that the 67 µm mesh was more efficient in the capture of early stages of small copepods thus providing a more accurate estimation of the fish larvae prey field.
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9

Deibel, Don, and Ben Lowen. "A review of the life cycles and life-history adaptations of pelagic tunicates to environmental conditions." ICES Journal of Marine Science 69, no. 3 (2011): 358–69. http://dx.doi.org/10.1093/icesjms/fsr159.

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Abstract Deibel, D., and Lowen, B. 2012. A review of the life cycles and life-history adaptations of pelagic tunicates to environmental conditions. – ICES Journal of Marine Science, 69: 358–369. Phylogeny, life cycles, and life-history adaptations of pelagic tunicates to temperature and food concentration are reviewed. Using literature data on lifetime egg production and generation time of appendicularians, salps, and doliolids, rmax, the maximum rate of lifetime reproductive fitness, is calculated as a common metric of adaptation to environmental conditions. The rmax values are high for all three groups, ranging from ∼0.1 to 1.9 d−1, so population doubling times range from ∼8 h to 1 week. These high values of rmax are attributable primarily to short generation times, ranging from 2 to 50 d. Clearly, pelagic tunicates are adapted to event-scale (i.e. days to weeks) rather than seasonal-scale changes in environmental conditions. Although they are not closely related phylogenetically, all three groups have a unique life-history adaptation promoting high lifetime fitness. Appendicularians have late oocyte selection, salps are viviparous, and doliolids possess a polymorphic asexual phase. There has been little research on hermaphroditic appendicularians, on large oceanic salps, and on doliolids generally. Research is needed on factors regulating generation time, on the heritability of life-history traits, and on age- and size-specific rates of mortality.
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10

GALT, CHARLES P., MATTHEW S. GROBER, and PAUL F. SYKES. "TAXONOMIC CORRELATES OF BIOLUMINESCENCE AMONG APPENDICULARIANS (UROCHORDATA: LARVACEA)." Biological Bulletin 168, no. 1 (1985): 125–34. http://dx.doi.org/10.2307/1541178.

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