Species composition and distribution of decapod crustaceans in the waters off Patagonia and Tierra del Fuego, South America

Arntz, Wolf; Gorny, Matthias; Soto, Raúl Villarroel; Lardies, Marco A.; Retamal, Marco A.; Wehrtmann, Ingo S.

doi:10.3989/scimar.1999.63s1303

Cited by 58 publications

(29 citation statements)

References 16 publications

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“…A detailed description of the study area, location of the stations, and sampling gears employed has been published by Arntz and Gorny (1996). The material used for the present study was obtained in the area between 53º42'8'' S, 70º57'4'' W and 55º09'2'' S, 67º01'6'' W; Arntz et al (1999) provide information regarding the exact geographical locations where Austropandalus grayi were collected. Ovigerous females of A. grayi were stored immediately in a 10%-buffered formaldehyde solution.…”

Section: Methodsmentioning

confidence: 99%

“…Referring to A. grayi, virtually nothing is known about the biology and ecology of this shrimp, a shallow water species inhabiting typically the antiboreal region of South America (Holthuis, 1952;Wehrtmann and Carvacho, 1997). A recent study of the decapod fauna of the Magellan zone revealed that A. grayi was the most common caridean shrimp in the study area, occurring generally at considerably less than 100 m water depth (Arntz et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

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Egg production of Austropandalus grayi (Decapoda, Caridea, Pandalidae) from the Magellan Region, South America

Wehrtmann¹,

Lardies²

1999

Sci. Mar.

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SUMMARY:Austropandalus grayi is one of three pandalid shrimp species reported from Chilean waters. Here we describe fecundity, reproductive output, and chemical composition of the incubated embryos of A. grayi, providing the first account of such information for a pandalid species inhabiting the southern hemisphere. Ovigerous females (n = 96) were collected during October -November 1994 with an Agassiz trawl in waters off Patagonia and Tierra del Fuego, South America. Both egg production (between 50 and 1858 embryos) and early egg volume (x -= 0.069 mm 3 ) of A. grayi were low when compared to values reported from other pandalids. Clutch size increased with maternal size, however, the size of recentlyspawned eggs was not linked to female size. Although the egg mass volume remained almost stable during the incubation period, females lost on average 51.1% of their initially-laid embryos; however, this loss was more than compensated by an 88.4% increase of the egg volume during embryogenesis. Mean reproductive output was relatively low (0.133) and not related to maternal size. The RO-data of A. grayi and other pandalids seem to indicate an increasing energy allocation for reproduction towards higher latitudes, a trend which would be contrary to the results of studies with other crustaceans. Water was the predominant constituent of the chemical composition of developing embryos and increased from 62.2% to 70.2% during the incubation period. At the same time, organic matter declined and mineral content augmented. Generally, our results are in agreement with previous findings with regard to the chemical composition of developing decapod embryos.Key words: Pandalidae, reproductive biology, latitudinal cline, southern hemisphere, Chile.RESUMEN: PRODUCCIÓN DE HUEVOS EN AUSTROPANDALUS GRAYI (DECAPODA, CARIDEA, PANDALIDAE) PROVENIENTE DE LA REGIÓN MAGALLÁNICA, AMÉRICA DEL SUR. -Austropandalus grayi es una de las tres especies de camarones pandálidos citadas en aguas chilenas. Se describen fecundidad, rendimiento reproductivo y composición química de los embriones de A. grayi incubados, representando ésta la primera descripción sobre la biología reproductiva de un pandálido del hemisferio sur. Se recolectaron hembras ovígeras (n = 96) durante octubre-noviembre de 1994 mediante una red de Agassiz en aguas adyacentes a la Patagonia y Tierra del Fuego, América del Sur. La producción de huevos (entre 50 y 1858 embriones) y el volumen de huevos recién puestos (x -= 0,069 mm 3 ) de A. grayi fueron bajos comparados con los valores de otros pandálidos. El número de huevos aumentó con el tamaño de la hembra, sin embargo, el tamaño de los huevos recién puestos no mostró relación con el tamaño de la hembra. Aunque el volumen de la masa de huevos permaneció casi estable durante el período de incubación, las hembras perdieron en promedio un 51,1% de los huevos incialmente producidos. Sin embargo, esta pérdida fue más que compensada por un incremento de un 88,4% del volumen del huevo durante la embriogénesis. El rendimiento reproductivo ...

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Egg production of Austropandalus grayi (Decapoda, Caridea, Pandalidae) from the Magellan Region, South America

Wehrtmann¹,

Lardies²

1999

Sci. Mar.

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“…Only a few species of caridean shrimps inhabit the Southern Ocean, and all produce pelagic larvae, even those in the deep sea (Thatje et al, 2005a). Brachyuran crabs are important components of Patagonian benthic ecosystems (Arntz et al, 1999;Gorny, 1999), yet they are entirely absent from the Scotia Arc and Antarctic waters. Recent records of lithodid anomuran crabs in the Southern Ocean indicate a return of these crabs to the Antarctic, perhaps as a consequence of global warming, after their extinction in the lower Miocene ((15 Ma) (Thatje et al, 2005b).…”

Section: Crustaceansmentioning

confidence: 99%

Brooding and Species Diversity in the Southern Ocean: Selection for Brooders or Speciation within Brooding Clades?

Pearse¹,

Mooi²,

Lockhart³

et al. 2009

Smithsonian at the Poles : Contributions to International Polar Year Science

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“…E. latreillii prefers sandy sediments and is typically covered with a variety of epizoans, mainly sponges, algae and hydroids (Garth, 1957;Retamal and Yáñez, 1973). Recent studies regarding the decapod fauna in waters off Patagonia and Tierra del Fuego, South America, revealed that E. latreillii is one of the predominant shallow water species, and accounted for 19 % of the total number of decapods collected in the Straits of Magellan (Arntz et al, 1999). Thus, E. latreillii can be considered a key species of the shallow water ecosystems surrounding the southern tip of the Americas.…”

Section: Introductionmentioning

confidence: 99%

Egg production in Eurypodius latreillei Guérin, 1828 (Decapoda: Majidae) in the Strait of Magellan, southern Chile

et al. 1999

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SUMMARY: Egg production and reproductive investment were studied in the spider crab Eurypodius latreillii from the Straits of Magellan, southern Chile. A total of 66 ovigerous females were analyzed, ranging in size from 29.0 to 62.9 mm carapace length. E. latreillii produced up to 15886 embryos, and clutch size increased with maternal size. Initial egg size was large (0.162 mm 3 ), and the embryo volume increase during the incubation period was 32 %. Brood mortality was substantial (83 %), and since egg volume increase could not compensate for the egg loss, average egg mass volume decreased considerably during embryogenesis. The average brood mass at laying accounted for 13 % of the maternal body mass (on a wet mass basis), and this value coincides with previous findings concerning energy allocation for egg production in other brachyuran crabs. In general, our data regarding E. latreillii correspond well with those from spider crab species inhabiting the northern hemisphere. The large egg size of E. latreillii compared with majids from other geographical regions may be an indication of a latitudinal gradient in the reproductive biology of majid crabs. Future studies with spider crabs from the southern hemisphere are desirable to substantiate this assumption.Key words: egg production; energy allocation; brood mortality; southern hemisphere, Majidae. GUÉRIN, 1828 (DECAPODA: MAJIDAE) EN EL ESTRECHO DE MAGALLANES, SUR DE CHILE. -Se estudió la producción de huevos y la inversión reproductiva del cangrejo araña Eurypodius latreillii proveniente del Estrecho de Magallanes, sur de Chile. Se analizaron un total de 66 hembras ovígeras con un rango de tamaños entre 29,0 y 62,9 mm de longitud de caparazón. E. latreillii produjo hasta un máximo de 15886 embriones, y el número de huevos aumentó con el tamaño de la hembra. El tamaño inicial del huevo fue grande (0,162 mm 3 ) y el aumento del volumen embrionario durante el período de incubación fue de 32 %. La mortalidad de huevos fue considerable (83 %), y como el aumento en el volumen de los huevos no pudo compensar la pérdida de huevos, el promedio del volumen de la masa de los huevos disminuyó de forma considerable durante la embriogénesis. La masa de huevos representó un 13 % de la masa corporal de la madre, y este valor coincide con observaciones previas sobre la asignación de energía para la producción de huevos en otros braquiuros. En general, nuestros datos sobre E. latreillii concuerdan con datos sobre especies del cangrejo araña del hemisferio norte. El tamaño grande de huevos de E. latreillii comparado con Majidae de otras regiones geográficas podría ser interpretado como una indicación de un gradiente latitudinal en la biología reproductiva de cangrejos májidos. Para corroborar esta interpretación se requerirían estudios futuros con cangrejos araña del hemisferio sur. RESUMEN: PRODUCCIÓN DE HUEVOS EN EURYPODIUS LATREILLIIPalabras clave: producción de huevos; asignación de energía; mortalidad de huevos, hemisferio sur, Majidae.

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Species composition and distribution of decapod crustaceans in the waters off Patagonia and Tierra del Fuego, South America

Cited by 58 publications

References 16 publications

Egg production of <i>Austropandalus grayi</i> (Decapoda, Caridea, Pandalidae) from the Magellan Region, South America

Egg production of <i>Austropandalus grayi</i> (Decapoda, Caridea, Pandalidae) from the Magellan Region, South America

Brooding and Species Diversity in the Southern Ocean: Selection for Brooders or Speciation within Brooding Clades?

Egg production in <i>Eurypodius latreillei</i> Guérin, 1828 (Decapoda: Majidae) in the Strait of Magellan, southern Chile

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