The Early Life-History of the High-Antarctic Silverfish, Pleuragramma antarcticum

Hubold, Gerd

doi:10.1007/978-3-642-82275-9_62

Cited by 75 publications

(80 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mean absolute growth rate has a value of 0.13 mm*day -1 . Similar values were found in pelagic larvae of Antarctic notothenioids (Clarke and North, 1991;Hubold, 1985;North, 1991;White and Burren, 1992). In summary, the endogenous feeding period in Patagonotothen tessellata larvae extends from hatching time until the fifth day, when the yolk reserve is totally consumed.…”

Section: Discussionsupporting

confidence: 78%

Age validation and growth of yolked larvae of <em>Patagonotothen tessellata</em> (Richardson, 1845) (Pisces: Nototheniidae) from the rocky littoral of the Beagle Channel, Argentina

Rae¹,

Roman²,

Spinoglio³

1999

Sci. Mar.

View full text Add to dashboard Cite

SUMMARY: Age and growth estimation of Patagonotothen tessellata larvae over the endogenous period was estimated by examining their otolith microstructure and the associated increment deposition rate. Analyzed specimens were incubated from egg-masses collected in Lapataia Bay, Beagle Channel, Argentina. Validation was performed by monitoring reared larvae of known ages. Actual age and increment count were regressed suggesting a daily deposition of one ring in the otolith, which began at hatching time and continued until larvae reached sixteen days old (time of massive mortality). Mean lengths at each age were estimated using Richards´ growth function; their constant (m) attained a value close to zero indicating that the data fitted to the von Bertalanffy model. Absolute growth rate was 0.55 mm*d -1 of total length at hatching, dropped near zero on the fifth day after hatching and afterwards, there was no growth. Yolk absorption rate (expressed as a ratio between minor axis/major axis of the vitelline-sac) showed a similar variation as that observed in absolute growth rate during the endogenous period. The total yolk absorption took five days in the unfed larvae group and seven days in the fed larvae group. The rapid absorption of the yolk and the observed growth pattern suggest that Patagonotothen tessellata larvae have a short endogenous period, reaching the state of first food uptake five days after hatching.Key words: Fish larvae, otolith, age determination, daily growth, Notothenioidea, Patagonotothen tessellata. (PISCES: NOTOTHENIIDAE) DEL LITORAL ROCOSO DEL CANAL DEL BEAGLE, ARGENTINA. -Las estimaciones de la edad y del crecimiento en larvas de Patagonotothen tessellata durante el periodo de alimentación endógena fueron realizadas analizando la microestructura de los otolitos y la tasa de deposición de incrementos. Los ejemplares analizados provienen de masas de huevos recogidas en Bahía Lapataia, Canal del Beagle, Argentina. La validación se realizó por medio del seguimiento de larvas de edad conocida mantenidas en acuarios. La regresión entre la edad real y los incrementos indicó la deposición diaria de un anillo en el otolito, comenzando al nacer y continuando hasta que las larvas tuvieron dieciséis días de edad (momento en el cual se registró la mortalidad masiva). La talla promedio en cada edad fue estimada usando el modelo de crecimiento de Richards, cuyo constante tuvo un valor cercano a cero, señalando un mejor ajuste al modelo de von Bertalanffy. La tasa absoluta de crecimiento fue de 0,55 mm d -1 de longitud total al nacer, descendió a valores cercanos a cero al quinto día, a partir del cual no se registró crecimiento alguno. El rápido consumo del vitelo junto a los patrones de crecimiento observados indican que las larvas de esta especie tienen un corto periodo de alimentación endógena, comenzando el periodo de alimentación exógena después de los cinco días de edad. RESUMEN: VALIDACIÓN DE LA EDAD Y CRECIMIENTO EN LARVAS VITELADAS DE PATAGONOTOTHEN TESSELLATAPalabras clave: Larvas de peces, otoli...

show abstract

Section: Discussionsupporting

confidence: 78%

Age validation and growth of yolked larvae of <em>Patagonotothen tessellata</em> (Richardson, 1845) (Pisces: Nototheniidae) from the rocky littoral of the Beagle Channel, Argentina

Rae¹,

Roman²,

Spinoglio³

1999

Sci. Mar.

View full text Add to dashboard Cite

show abstract

“…More remarkable than the absence of species from the surface layer, however, was the exclusive presence of 11 species in the 0-2 m depth stratum. Seven of these species were larval or juvenile fishes, and 2 were juvenile squids (see appendix Table A1), supporting the contention that the Antarctic surface and under-ice habitat serves as a nursery habitat for juvenile nekton (Collins and Rodhouse, 2006;Hubold, 1985;Krakatitsa et al, 1993;White and Piatkowski, 1993). All species unique to the surface layer were sampled either in summer or in winter.…”

Section: Species Compositionmentioning

confidence: 54%

“…Incidental reports from the Southern Ocean, dating from the early days of Antarctic research to modern-day observations, have emphasised the significance of the surface layer as a habitat often hosting increased abundances of life (Hardy and Gunther, 1935;Kaufmann et al, 1993;Krakatitsa et al, 1993;Pakhomov, 1993b). The surface layer has also been proposed as an important nursery habitat for Antarctic fishes (Hubold, 1985;White and Piatkowski, 1993). In most recent studies, however, the surface layer is integrated in a deeper epipelagic depth stratum, typically ranging from the surface to 50-300 m depth (e.g.…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes in the vertical distribution and community structure of Antarctic macrozooplankton and micronekton

Flores

Hunt

Kruse

et al. 2014

Deep Sea Research Part I: Oceanographic Research Papers

View full text Add to dashboard Cite

This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. b s t r a c tThe macrozooplankton and micronekton community of the Lazarev Sea (Southern Ocean) was investigated at 3 depth layers during austral summer, autumn and winter: (1) the surface layer (0-2 m); (2) the epipelagic layer (0-200 m); and (3) the deep layer (0-3000 m). Altogether, 132 species were identified. Species composition changed with depth from a euphausiid-dominated community in the surface layer, via a siphonophore-dominated community in the epipelagic layer, to a chaetognathdominated community in the deep layer. The surface layer community predominantly changed along gradients of surface water temperature and sea ice parameters, whereas the epipelagic community mainly changed along hydrographical gradients. Although representing only 1% of the depth range of the epipelagic layer, mean per-area macrofauna densities in the surface layer ranged at 8% of corresponding epipelagic densities in summer, 6% in autumn, and 24% in winter. Seasonal shifts of these proportional densities in abundant species indicated different strategies in the use of the surface layer, including both hibernal downward and hibernal upward shift in the vertical distribution, as well as year-round surface layer use by Antarctic krill. These findings imply that the surface layer, especially when it is ice-covered, is an important functional node of the pelagic ecosystem that has been underestimated by conventional depth-integrated sampling in the past. The exposure of this key habitat to climate-driven forces most likely adds to the known susceptibility of Antarctic pelagic ecosystems to temperature rise and changing sea ice conditions.

show abstract

“…2). This is particularly interesting because of the seasonal migration of P. antarctjcum (Hubold 1985, Gerasimchook & Lanin 1988. Different water masses are crossed during migration and functionally different antifreeze compounds could be helpful when environmental temperature varies.…”

Section: Discussionmentioning

confidence: 99%

Antifreeze glycopeptides and peptides in Antarctic fish species from the Weddell Sea and the Lazarev Sea

Wöhrmann¹

1996

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Antifreeze glycopeptides and peptides have been isolated from 37 species of Antarctic fish representing the families Nototheniidae, Artedidraconidae, Bathydraconidae, Channichthyidae, Muraenolepididae. Liparididae, Zoarcidae and Myctophidae. Amino acid and carbohydrate analysis as well as antifreeze activity indicate that all investigated notothenioids contain antifreeze glycopeptides [AFGP). Pleuragramma antarcticurn, Lepidonotothen kempi, Bathydraco rnarri and Dolloidraco longedorsalis synthesize additional antifreeze molecules. The non-notothenioid species possess antifreeze peptides (AFP), except Muraenolepis marrnoratus and Macrourus holotrachys, which possess a glycosylated antifreeze pept~de similar to the AFGP found in the notothenio~d species. A novel glycopeptide comprised of the carbohydrate residue N-acetylglucosamine and the amino acids asparagine, glutamine, glycine, alanine, and traces of arginine, valine, leucine and threonine was isolated and characterized from P. antarcticum. The level of antifreeze concentration was dependent on the ambient water temperature, the depth of catch and life cycle of the species. Antifreeze activity of AFGP varies between 0.52 (Neopagetopsis ionah) and 1.20°C ( P antarctjcum) at a concentration of 20 mg ml-' Antifreeze activity of AFP is lower than 0.50°C. A linear increase in activity of the AFGP could be demonstrated concomitant with decreasing ice content. The structural diversity of antifreeze molecules and their occurrence in a wide range of Arctic and Antarctic fish species suggest that they evolved from precursor proteins before the continental drift and recently during Cenozoic glaciation into the various antifreeze molecules.

show abstract

The Early Life-History of the High-Antarctic Silverfish, Pleuragramma antarcticum

Cited by 75 publications

References 3 publications

Age validation and growth of yolked larvae of <em>Patagonotothen tessellata</em> (Richardson, 1845) (Pisces: Nototheniidae) from the rocky littoral of the Beagle Channel, Argentina

Age validation and growth of yolked larvae of <em>Patagonotothen tessellata</em> (Richardson, 1845) (Pisces: Nototheniidae) from the rocky littoral of the Beagle Channel, Argentina

Seasonal changes in the vertical distribution and community structure of Antarctic macrozooplankton and micronekton

Antifreeze glycopeptides and peptides in Antarctic fish species from the Weddell Sea and the Lazarev Sea

Contact Info

Product

Resources

About