The biology of Pandalus

Bergström, Bo

doi:10.1016/s0065-2881(00)38003-8

Cited by 152 publications

(136 citation statements)

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“…Considering the life span of this species (4.7 years), calculated from the mean CL of the larger size group and the growth parameters, P. gracilis seems to change sex at an early life stage. Differences in size and age at sex transition exist between P. gracilis and other pandalid shrimps (Bergström, 2000), which is likely associated with their reproductive strategies.…”

Section: Discussionmentioning

confidence: 99%

“…The initial sex is always more abundant in fishes that change sex, resulting in a male bias for protandrous species and a female bias for protogynous species (Choat and Robertson, 1975). Some decapod crustaceans, such as pandalid and crangonid shrimps, which are commercially exploited, are protandrous hermaphrodites (Tiews, 1970;Bergström, 2000). These shrimps exhibit a wide range of reproductive strategies because of the characteristics of sex transition.…”

Section: Discussionmentioning

confidence: 99%

“…Most pandalid shrimps are protandric hermaphrodites, becoming mature females after spending 1-4 years as functional males, depending on the species and geographic location (Butler, 1964;Holthuis, 1980;Hayashi, 1988;Komai, 1999;Bergström, 2000), and they have been used as model organisms for studying the evolution of sex change (Charnov, 1982;Bergström, 2000). The timing of their sex change often fluctuates among years and populations, and as result, both early-and late-reversing individuals occur in these populations (Bergström, 2000). Also, the distribution of pandalids is related to their reproductive biology and the specific ecosystem.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Bergström (2000) published a comprehensive review on the biological aspects of Pandalus species. Hayashi (1988), however, revived the species P. gracilis based on four morphological characteristics from new material.…”

Section: Introductionmentioning

confidence: 99%

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Growth Pattern of Pandalus gracilis (Decapoda: Pandalidae) in the Southern Coastal Waters of Korea

Oh¹

2011

Fisheries and aquatic sciences

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The population dynamics of Pandalus gracilis was investigated in the southeastern coastal area of Korea between May 1998 and April 2000. Of the 4,127 specimens, 57% were identified as females, 39% as males, and 4% as transitional hermaphrodites. The number of females was greater than that of males and transexuals. A significant correlation was observed between the number of transitional hermaphrodites and ambient seawater temperature. Growth parameters were estimated using the modified von Bertalanffy growth function model incorporating seasonal variation in growth using the program ELEFAN. Females grew faster and reached a larger sizeat-age than males (K=0.65/y and L ∞ =17.86 mm carapace length [CL] for females; K=0.51/y and L ∞ =14.70 mm CL for males). Mean size and age (95% confidence limits) at sex transition, calculated from growth parameters, were 7.07 mm carapace length and 1.05 years, respectively. The reproductive strategies of pandalid shrimps are discussed in terms of the type of sex transition.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Growth Pattern of Pandalus gracilis (Decapoda: Pandalidae) in the Southern Coastal Waters of Korea

Oh¹

2011

Fisheries and aquatic sciences

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“…Like A. antennatus, this species forms dense aggregations that have spatiotemporally well-defined sex compositions and size structures and well-defined exploitation patterns. Bergström (2000) postulated that certain localized stocks of P. borealis arise from recruitment from large pools of larvae. Hydrodynamic factors during the early stages non-significant, * P < 0.05, ** P < 0.01, *** P < 0.001 Fig.…”

Section: Discussionmentioning

confidence: 99%

Influence of the genetic structure of the red and blue shrimp, <i>Aristeus antennatus</i> (Risso, 1816), on the sustainability of a deep-sea population along a depth gradient in the western Mediterranean

Sardà¹,

Roldán²,

Heras³

et al. 2010

Sci. Mar.

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SUMMARY:The red and blue shrimp, Aristeus antennatus, inhabits deep shelf waters in the Mediterranean Sea, where the shallower portion of its distribution supports a large commercial fishery. Recent prospecting surveys in the western Mediterranean have detected virgin stocks dwelling at more than 1000 m, but the extent of gene flow between the exploited shallowdwelling stock and the deep-dwelling stock is unknown. To investigate the genetic structure of the population and estimate the depth component of gene flow, a portion of the mitochondrial DNA 16S gene (547 pb) was sequenced for 321 individuals from four different depths (350, 700, 1100 and 1500 m) at a location in the Catalan Sea. Haplotype and nucleotide diversity values were low and did not significantly differ across depths. Analysis of molecular variance showed no significant genetic differences between depths. Mismatch distribution and neutrality tests indicated that A. antennatus has undergone recent demographic expansion in the two shallowest layers. Our results suggest that the species is genetically structured as a sort of metapopulation in which gene flow that occurs during the larval and juvenile stages, when larvae are carried downstream and juveniles are carried upstream by cascading, plays an important role in the resilience of the exploited layers.Keywords: red and blue shrimp, Aristeus antennatus, mtDNA, 16S rDNA, gene flow, depth distribution, Western Mediterranean, metapopulation. RESUMEN: Influencia de la estructura genética de la gamba rosada, Aristeus AntennAtus (Risso, 1816) en la sostenibilidad de su población a través del gradiente de profundidad en el mediterráneo occidental. -La gamba rosada Aristeus antennatus habita las aguas profundas del Mar Mediterráneo, donde los stocks de aguas más someras soportan una importante presión pesquera. Recientes campañas de prospección llevadas a cabo en el Mediterráneo Occidental han detectado stocks vírgenes a más de 1000 m de profundidad, pero se desconoce el flujo génico entre estos stocks y los menos profundos. Con el fin de investigar la estructura genética de dichos stocks, y estimar el componente de flujo génico entre ellos, se secuenció una porción de ADN mitocondrial, el gen 16S (547 bp) en 321 individuos procedentes de cuatro profundidades (350, 700, 1100 y 1500 m) de una localidad del mar Catalán. Los valores de diversidad haplotípica y nucleotídica fueron bajos y no resultaron significativos entre profundidades. El análisis de la varianza molecular tampoco mostró diferencias significativas entre profundidades. La distribución mismatch y los tests de neutralidad indicaron que A. antennatus tuvo una expansión demográfica reciente en las dos fracciones menos profundas. Nuestros resultados sugieren que la gamba rosada está genéticamente estructurada como una metapoblación donde el flujo génico ocurre, en parte, mediante la deriva de larvas y de juveniles, cuando éstos últimos aparecen en las zonas menos profundas en los períodos siguientes al cascading. Este aspecto juega un rol importa...

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Whole‐animal accumulation, oxidative stress, transcriptomic and metabolomic responses in the pink shrimp (Pandalus montagui) exposed to teflubenzuron

Aulin

Samuelsen

Hannisdal

et al. 2018

J of Applied Toxicology

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The benzoylurea chitin synthesis inhibitor teflubenzuron, widely used against sea lice in North Atlantic aquaculture, may pose an environmental threat to non‐targeted crustaceans. In this experiment, laboratory acclimated pink shrimp (Pandalus montagui), a species found in fjords with Atlantic salmon farming, were exposed to dietary teflubenzuron for 46 days (control; low dose: 0.01 μg/g; high dose: 0.1 μg/g). The exposure doses represent 0.1% and 1% of a standard treatment dose for Atlantic salmon. Mortality and prevalence of deformities, pharmacokinetics, oxidative stress and transcriptomic and metabolomic profiling were used to assess the response to teflubenzuron exposure. Mortality in the high‐dose group was 25% (five of 20 individuals). No control or low‐dose group shrimps died. Phenotypic responses,i.e., leg deformities (0 control, 6 low, 8 high) and cloudy eyes (0 control, 3 low, 7 high), were observed in some surviving shrimps (control n = 15, low n = 17, high n = 15). Accumulated levels of teflubenzuron in shrimps from the high‐dose group ranged from 4.7 to 369 ng/g wet weight. Transcriptomic profiling showed very few significantly altered genes in the exposed shrimps. Teflubenzuron‐induced changes to the metabolome pointed to well‐known effects of benzoylurea agents, with reduced levels of N‐acetylglucosamine indicating an effect on chitin synthesis. The metabolomic profiling showed that teflubenzuron exposure was associated with reduced energy metabolism. Some metabolites pointed to increased necrosis and/or bacterial overgrowth in the teflubenzuron‐exposed shrimps. In conclusion, this study shows that teflubenzuron causes phenotypic effects in P. montagui exposed to 0.1% of the treatment dose given to Atlantic salmon.

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The biology of Pandalus

Cited by 152 publications

References 113 publications

Growth Pattern of Pandalus gracilis (Decapoda: Pandalidae) in the Southern Coastal Waters of Korea

Growth Pattern of Pandalus gracilis (Decapoda: Pandalidae) in the Southern Coastal Waters of Korea

Influence of the genetic structure of the red and blue shrimp, <i>Aristeus antennatus</i> (Risso, 1816), on the sustainability of a deep-sea population along a depth gradient in the western Mediterranean

Whole‐animal accumulation, oxidative stress, transcriptomic and metabolomic responses in the pink shrimp (Pandalus montagui) exposed to teflubenzuron

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