scholarly journals Northern shrimp Pandalus borealis population collapse linked to climate-driven shifts in predator distribution

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0253914
Author(s):  
R. Anne Richards ◽  
Margaret Hunter
Keyword(s):  
Spatial Data ◽  
Gulf Of Maine ◽  
Stomach Contents ◽  
Fishing Mortality ◽  
Southern Limit ◽  
Pandalus Borealis ◽  
Spatial Overlap ◽  
Population Collapse ◽  
Northern Shrimp ◽  
And Shifts

The northern shrimp (Pandalus borealis Krøyer) population in the Gulf of Maine collapsed during an extreme heatwave that occurred across the Northwest Atlantic Ocean in 2012. Northern shrimp is a boreal species, and reaches its southern limit in the Gulf of Maine. Here we investigate proximate causes for the population collapse using data from fishery-independent surveys, environmental monitoring, and the commercial fishery. We first examined spatial data to confirm that the decline in population estimates was not due to a major displacement of the population, and then tested hypotheses related to fishing mortality and shifts in predation pressure. Fishing mortality may have contributed but could not explain the magnitude of the decline or the disappearance of pre-exploitable size individuals. Stomach contents analysis and biomass trends revealed no new fish predators of shrimp. However, longfin squid (Doryteuthis pealeii Lesueur) was unique among all species in showing time-series biomass peaks during spring, summer and fall of 2012, and spatial overlap with northern shrimp was unusually high in 2012. Longfin squid is a voracious and opportunistic predator that consumes crustaceans as well as fish. We hypothesize that the warmer temperatures of 2012 not only led to expansion of longfin squid distribution in Gulf of Maine, but had differential effects on migration phenology that further increased spatial overlap with northern shrimp. The weight of our evidence suggests that longfin squid predation was likely a significant factor in the collapse of northern shrimp in the Gulf of Maine.

scholarly journals The Gulf of Maine Northern Shrimp (Pandalus borealis) Fishery: A Review of the Record

2000 ◽  
Vol 27 ◽  
pp. 193-226 ◽  
Author(s):  
S H Clark ◽  
S X Cadrin ◽  
D F Schick ◽  
P J Diodati ◽  
M P Armstrong ◽  
...  
Keyword(s):  
Gulf Of Maine ◽  
Pandalus Borealis ◽  
Northern Shrimp

Possible climate-induced environmental impacts on parasite-infection rates of northern shrimp Pandalus borealis eggs in the Gulf of Maine

2020 ◽  
Vol 140 ◽  
pp. 109-118
Author(s):  
HY Chang ◽  
R Klose ◽  
Y Chen
Keyword(s):  
New England ◽  
Environmental Changes ◽  
Gulf Of Maine ◽  
Infection Rates ◽  
Science Center ◽  
Infected Female ◽  
Pandalus Borealis ◽  
Fisheries Science ◽  
Female Body Size ◽  
Northern Shrimp

The Gulf of Maine northern shrimp Pandalus borealis population once supported a significant commercial winter fishery for the New England states. However, the fishery has been on moratorium since 2014 due to consecutive recruitment failures. The issue of parasite-infected eggs, so-called ‘white eggs,’ has long been identified for the Gulf of Maine northern shrimp, which makes shrimp eggs nonviable and subsequently hampers the recruitment potential. Furthermore, the proportion of infected females was observed to increase with water temperature. As Gulf of Maine temperatures have been increasing for decades, it is important to re-visit issues related to white eggs to evaluate possible impacts of climate-induced environmental changes on the white egg infection rates. We used biological samples collected by the Northeast Fisheries Science Center in 2012-2016 to evaluate the probability that a female shrimp was infected (Pinf) and the proportion of white eggs in an infected female shrimp (pwe). Although Pinf was high, with an average of 73.81% over the Gulf of Maine, pwe was mostly <5%. The variation in both Pinf and pwe examined in this study was not well explained by environmental factors or female body size. However, the average rates of both Pinf and pwe observed in this study were higher than those observed in the 1960s when the bottom temperatures were cooler. The results can be used to account for egg mortality and provide information on potential impacts of possible climate-induced variability on shrimp population dynamics.

Analysis of Length Frequency Samples with Relative Abundance Data for the Gulf of Maine Northern Shrimp (Pandalus borealis) by the MULTIFAN Method

1991 ◽  
Vol 48 (4) ◽  
pp. 591-598 ◽  
Author(s):  
David A. Fournier ◽  
John R. Sibert ◽  
Mark Terceiro
Keyword(s):  
Relative Abundance ◽  
Gulf Of Maine ◽  
Parameter Estimates ◽  
Detailed Knowledge ◽  
Frequency Data ◽  
Length Frequency ◽  
Pandalus Borealis ◽  
Abundance Data ◽  
Northern Shrimp ◽  
Length Frequency Data

We present an extension of the MULTIFAN method for simultaneously analyzing several length frequency data sets from length frequency data collected by research trawl surveys. The assumption that the research trawl samples the animals in a regular fashion allows the proportions at age in the samples to be parameterized in terms of relative year class strengths and the age-dependent selectivity of the sampling procedure. When available, relative abundance data can be incorporated into the analysis and permit the estimation of mortality. The method is applied to Gulf of Maine northern shrimp (Pandalus borealis) data. The parameter estimates obtained agree substantially with those previously obtained using a more detailed knowledge of the species' biology.

HISTORY OF THE STUDY AND FEATURES OF THE NORTHERN SHRIMP PANDALUS BOREALIS FISHERY IN THE NORTHERN PART OF THE SEA OF OKHOTSK

Fisheries ◽  
2021 ◽  
Vol 2021 (3) ◽  
pp. 62-67
Author(s):  
Yulia Shcherbakova ◽  
Yuri Semenov ◽  
Julia Elatinceva ◽  
Andrey Smirnov
Keyword(s):  
Sea Of Okhotsk ◽  
Industrial Development ◽  
Pandalus Borealis ◽  
The Sea Of Okhotsk ◽  
Northern Shrimp ◽  
History Of

The article deals with the history of the study of the northern shrimp, which lives in the northern part of the Sea of Okhotsk. Based on the materials collected in 2020, in comparison with 2018-2019, the course of fishing and catching of this object is analyzed. It is shown that the prospects of industrial development of this valuable object in the coming years do not cause concerns.

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