Comparison of the Growth of Northern Shrimp (<i>Pandalus borealis</i>) from Four Regions of the Northwest Atlantic

Parsons, D G; Mercer, Vicki; Veitch, P J

doi:10.2960/j.v9.a11

Cited by 17 publications

(14 citation statements)

References 8 publications

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“…The most discussed factor in the literature is ambient temperature which is considered to explain differences in age at first spawning (Apollonio et al 1986) and CPL at age (Shumway et al 1985). My results from the temporally isolated shrimp populations in Gullmarsfjorden growing at different mean ambient temperatures during different deep water stagnation periods indicate that there is no correlation between temperature and growth rate within the temperature interval of 4 to 6 "C. A similar observation was made by Parsons et al (1989) comparing Northern shrimp growth in the temperature interval of 2 to 4 "C from 4 regions of the Northwest Atlantic.…”

Section: Differences In Male and Female Growthmentioning

confidence: 56%

Growth, growth modelling and age determination of Pandalus borealis

Bergström¹

1992

Mar. Ecol. Prog. Ser.

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A growth model for pandalid shrimps accounting for seasonal variations in growth is presented based on successive additions of sigmoid functions along a basic von Bertalanffy growth (VBG) equation. Results obtained with this new model are compared with results from the VBG equation and from a VBG model modified by the addition of a sine function. Results show that growth of Pandalus borealis (Krsyer) from Gullmarsfjorden on the Swedish west coast is best described by the seasonal models. Of the 2 seasonal models, the new model gave a slightly better fit. Seasonal variations in growth are discussed in relation to the reproductive cycle of P. borealis. Differences in growth pattern between sexes were also found in a 4 yr series of data from the fjord. The main difference was that male growth declined earlier in the year (late summer-autumn) than female growth which declined later (autumn-winter) and for a longer period. Differences in growth rate between sexes are also discussed. Since Gullmarsfjorden contained 4 different periodically isolated P. borealis populations during the study period (1984 to 1987), the relationship between growth rate and mean ambient temperature could be investigated in the temperature interval of 4 to 6 "C. No correlation between these 2 factors was found. Results also indicated that recurring immigrations of adult shrimp during late winter-early spring from the Skagerrak population did not significantly affect growth-rate estimates. Finally, sizes by age of P. borealis in the fjord did not dlffer s~gnificantly from reported sizes by age In other boreal populations.

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Section: Differences In Male and Female Growthmentioning

confidence: 56%

Growth, growth modelling and age determination of Pandalus borealis

Bergström¹

1992

Mar. Ecol. Prog. Ser.

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“…For example, Butler (1964) and Charnov (1979) suggested that populations at lower latitudes have a higher proportion of EMFs because those individuals grow more rapidly (Rasmussen 1953). There are few conclusive reports showing which factors govern growth in pandalid shrimps, and the effect of water-temperature fluctuations in any one area is not clear (Shumway et al 1985, Apollonio et al 1986, Parsons et al 1989, Bergström 1992. In shallow water, water temperature and/or the availability of food is much more variable among localities than in the deep sea.…”

Section: Discussionmentioning

confidence: 99%

Factors affecting the occurrence of early maturing males in the protandrous pandalid shrimp Pandalus latirostris

Chiba

Goshima²,

Mizushima³

2000

Mar. Ecol. Prog. Ser.

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Some Age-0 males of the protandrous pandalid shrimp Pandalus latirostris Rathbun mature in their first year, and the proportion of these early maturing males (EMMs) in a population varies both locally and annually. Two laboratory experiments and 2 field observations were conducted to clarify the factors affecting the occurrence of EMMs. The first experiment showed that EMMs needed to grow fast until the breeding season and began producing sperm at about 14 mm carapace length. Individuals with an AMP (length of the endopod/length of the appendix masculina) value above 40 were defined as EMMs. In the second experiment, the effects of food amount, hatching date and maternal size on growth at Age-0 were examined. Food amount strongly affected the early growth. A difference in hatching date of > 2 wk caused a large difference in body size of juveniles; this difference was maintained until the breeding season 3 mo later. Large females spawned larger larvae than small females, but the size difference between larvae from large females and those from small females decreased with time. Field observations showed that at one site in Saroma Lagoon, Hokkaido, Japan, hatching occurred over a 1 mo period. In 1996/1997, we found no obvious differences of size distribution of Age-0 individuals and the occurrence of EMM as a function of location in the lagoon or year. These results may have been caused by slow growth, because water temperatures in the lagoon were much colder in 1996/1997 than during 1987 to 1995. We conclude that the occurrence of EMMs is closely related to various environmental factors in shallow waters. Therefore, the proportion of EMMs may fluctuate both locally and annually. This study shows that a small difference in juvenile growth over a short period can alter the subsequent life history of P. latirostris. KEY WORDS: Protandry · Pandalid shrimp · Growth · Maturity · Life history variationResale or republication not permitted without written consent of the publisher

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“…, 1985; Nilssen and Hopkins, 1991). Parsons et al. (1989) inferred an increase in longevity from 6 to 8 yr from the southern Newfoundland–Labrador Shelf to Davis Strait.…”

Section: Introductionmentioning

confidence: 99%

Shrimp (Pandalus borealis) growth and timing of the spring phytoplankton bloom on the Newfoundland–Labrador Shelf

Fuentes-Yaco

Koeller

Sathyendranath

et al. 2006

Fisheries Oceanography

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We examined latitudinal and temporal changes in the availability of food for young shrimp (Pandalus borealis) on the Newfoundland-Labrador Shelf, using a suite of quantitative characteristics of the spring phytoplankton bloom determined from satellite ocean colour data, including bloom initiation time, maximum chlorophyll concentration, timing of the maximum, and bloom duration. We found significant correlations between bloom intensity, timing, and the size of young shrimp. The results are discussed in relation to the observation that, since the early 1990s, carapace lengths of shrimp have been decreasing in many Northwest Atlantic stocks.

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Comparison of the Growth of Northern Shrimp (Pandalus borealis) from Four Regions of the Northwest Atlantic

Cited by 17 publications

References 8 publications

Growth, growth modelling and age determination of Pandalus borealis

Growth, growth modelling and age determination of Pandalus borealis

Factors affecting the occurrence of early maturing males in the protandrous pandalid shrimp Pandalus latirostris

Shrimp (Pandalus borealis) growth and timing of the spring phytoplankton bloom on the Newfoundland–Labrador Shelf

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