Population biology of hyperbenthic crustaceans in a cold water environment (Conception Bay, Newfoundland). I. Mysis mixta (Mysidacea)

Richoux, Nicole B.; Deibel, Don; Thompson, R. J.

doi:10.1007/s00227-003-1249-7

Cited by 30 publications

(27 citation statements)

References 34 publications

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“…Species with continuous reproduction and various generations per year usually inhabit shallow marine waters in latitudes between 25 and 50° with main cohorts in spring, summer and autumn (MAUCHLINE 1965, 1971b, 1980, SAN VICENT & SORBE 1993, GARNACHO et al 2001. Due to winter low temperatures, many mysid species could not breed during this season (MAUCHLINE 1980, RICHOUX et al 2004. Metamysidopsis neritica, however, showed a winter generation, which could be related to the moderated decrease of the water temperature during this season at Atami Beach.…”

Section: Discussionmentioning

confidence: 99%

Population structure and reproductive biology of Metamysidopsis neritica (Crustacea: Mysidacea) in a sand beach in south Brazil

Calil

Borzone

2008

Rev. Bras. Zool.

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Mysidacea are common sublittoral crustaceans that inhabit all coasts in the world. In this study, the population characteristics and the reproductive biology of Metamysidopsis neritica Bond-Buckup & Tavares, 1992 were studied in the surf zone of a south Brazilian beach (Atami). Mysids were sampled at monthly intervals from August, 1999 to July, 2000 (total of 29,490 individuals). Individuals were classified into six population categories. The highest abundance occurred in May (8,665) and August (6,415), and lowest in September (336) and December (368). Three main generations were identified, namely the summer, fall and winter generations. The winter generation was the longest (four to five months). The fall generation lasted four months, and the summer one extended from three to four months. Ovigerous females occurred throughout the year, with a greater proportion in July. The number of eggs or larvae varied from one to 16. Weak associations were found between female length and egg number, egg volume, and the number of larvae with and without eyes. Egg volume increased during the coldest season, whereas the smallest values were recorded during summer. These results suggest a possible direct relationship between egg volume and generation longevity.

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Section: Discussionmentioning

confidence: 99%

Population structure and reproductive biology of Metamysidopsis neritica (Crustacea: Mysidacea) in a sand beach in south Brazil

Calil

Borzone

2008

Rev. Bras. Zool.

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“…In Conception Bay, the life span of females is 2.5 years (spawning to death), of which 2 years of development are normally required before reproduction occurs (Richoux et al, 2004a,c). Mysis mixta is an opportunistic omnivore that undergoes ontogenetic shifts in its diet (Viherluoto and Viitasalo, 2001;Richoux et al, 2004a). Acanthostepheia malmgreni appears more limited to a carnivorous feeding mode, although juveniles feed on small particles including phytoplankton and detritus (Sainte-Marie and Brunel, 1985;Richoux et al, 2004c).…”

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confidence: 99%

“…PUFA are particularly important in cold-water organisms because cell membranes must remain sufficiently fluid despite the tendency for increased rigidity at low temperatures (Hall et al, 2000). As water below 80-m depth in Conception Bay remains near 0 C year-round (Richoux et al, 2004a), temperature is not considered a highly influential variable in this study.…”

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confidence: 99%

Seasonal and developmental variation in the fatty acid composition of Mysis mixta (Mysidacea) and Acanthostepheia malmgreni (Amphipoda) from the hyperbenthos of a cold-ocean environment (Conception Bay, Newfoundland)

Richoux¹,

Deibel²,

Thompson³

et al. 2005

Journal of Plankton Research

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Fatty acid composition in different life-history stages of Mysis mixta (Crustacea, Mysidacea) and Acanthostepheia malmgreni (Crustacea, Amphipoda) from Conception Bay, Newfoundland, was examined throughout 1999 and 2000. The primary aim was to relate the seasonal fatty acid dynamics to each species' life cycle and to published information on the occurrence and quality of the annual phytoplankton bloom. Divergent patterns in fatty acid composition and specific fatty acid marker ratios reflected different life styles, diets and critical periods of energy accumulation and utilization in M. mixta and A. malmgreni. Changes in fatty acids reflected the sequence of plankton taxa during and following the spring bloom, starting with diatoms and dinoflagellates and ending with copepods. Immature mysids exhibited a particularly rapid accumulation of diatom-associated fatty acids at the start of the spring bloom, probably owing to the high degree of motility of M. mixta and the broad range of prey types available to this species. In contrast, immature amphipods did not begin to accumulate significant amounts of phytoplankton fatty acids until after the spring bloom material had settled to the hyperbenthos in May. Differences in fatty acid composition indicated that A. malmgreni was restricted to a lower quality diet than was M. mixta and that the trophic connection between A. malmgreni and production in the euphotic zone was weaker.

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“…This peak of abundance could be related to a recruitment event because, remarkably, it was not parallel to an increase in biomass and diversity. Recruitment of peracarids has been described as coupled with inputs of fresh OM derived from surface production (Richoux et al, 2004). The same coupling was deduced for suprabenthos over the continental slope (Cartes et al, 2008).…”

Section: Discussionmentioning

confidence: 70%

“…The relationship between production partitioning and trophic strategies (Warwick, 1982;Buchanan and Warwick, 1974) and responses to organic matter inputs (Pearson and Rosenberg, 1978;Gremare et al, 1997) are of great importance as macrobenthos plays an important role in ecosystem processes in soft-bottoms, including nutrient cycling, dispersion and burial, and secondary production (Snelgrove, 1998;Lohrer et al, 2004). In this context few studies have considered the seasonal variation of macrofaunal communities linked to a detailed analysis of environmental variables on continental shelves (Buhl-Jensen and Fosså, 1991;Richoux et al, 2004;Cartes et al, 2007). The main findings in the Mediterranean are related to changes in food input and in the production rates of species at short-term (Gremare et al, 1998) and small spatial (Cartes et al, 2009) scales.…”

Section: Introductionmentioning

confidence: 99%

Influence of environmental factors on the dynamics of macrobenthic crustaceans on soft-bottoms of the Ebro Delta continental shelf (northwestern Mediterranean)

Juan¹,

Cartes²

2011

Sci. Mar.

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SUMMARY: Short-term temporal variability in infaunal crustacean communities was evaluated against environmental variability. The area of study was located at two stations at 45 and 60 m depth under the influence of the Ebro River. Differences in the relative abundance of crustacean species between sites might be related to the distance from the river, with higher organic matter supply and finer mud content near the river. There was a marked seasonal variability linked to high phytoplankton production in spring, which supplied organic matter to the benthos, inducing higher crustacean abundance. In late summer there was a reduction in the infaunal crustacean abundance and species richness that could have been caused by two factors: the establishment of the thermocline, which could limit the availability of organic matter to the seabed, and the high water temperatures, which caused the production of phytoplankton exudates and accumulation of mucilaginous aggregates over the seabed. The 45-m site was under the influence of otter-trawl fishing and precisely in this area the seasonal variability was not observed, probably masked by the effects of trawling impact.Keywords: Peracarida, benthos, spatial variations, muddy sediments, temperature, mucilaginous aggregates. RESUMEN: Influencia de factores ambientales en la dinámica de crustáceos macrobentónicos en fondos fangosos de la plataforma continental del Delta del Ebro (Mediterráneo noroccidental). -Evaluamos la variabilidad temporal de la comunidad de crustáceos endobentónicos frente a la variabilidad ambiental a pequeña escala. El estudio se sitúa en la plataforma continental frente a la desembocadura del Rio Ebro, en dos estaciones de muestreo a 45 y 60 m de profundidad. Las diferencias en la abundancia relativa de crustáceos entre las dos estaciones pueden estar relacionadas con la distancia a la desembocadura del Ebro, con un mayor aporte de materia orgánica y mayor contenido de fango cerca del rio. Observamos una variabilidad estacional relacionada con la alta producción de fitoplancton en primavera, con aportes de materia orgánica al bentos favoreciendo una mayor abundancia de crustáceos. Al final del verano se establece la termoclina, pudiendo limitar el aporte de materia orgánica al bentos, y junto con las altas temperaturas, que originaron acumulaciones de exudados de fitoplancton en el fondo, pudo causar una reducción en la abundancia y riqueza específica. La variabilidad estacional no es tan marcada en la estación de muestreo a 45 m. Esta zona está impactada por la pesca de arrastre, que probablemente enmascara la variabilidad temporal.

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Population biology of hyperbenthic crustaceans in a cold water environment (Conception Bay, Newfoundland). I. Mysis mixta (Mysidacea)

Cited by 30 publications

References 34 publications

Population structure and reproductive biology of Metamysidopsis neritica (Crustacea: Mysidacea) in a sand beach in south Brazil

Population structure and reproductive biology of Metamysidopsis neritica (Crustacea: Mysidacea) in a sand beach in south Brazil

Seasonal and developmental variation in the fatty acid composition of Mysis mixta (Mysidacea) and Acanthostepheia malmgreni (Amphipoda) from the hyperbenthos of a cold-ocean environment (Conception Bay, Newfoundland)

Influence of environmental factors on the dynamics of macrobenthic crustaceans on soft-bottoms of the Ebro Delta continental shelf (northwestern Mediterranean)

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