Multi-scale quantification of the effects of temperature on size at maturity in the American lobster ( Homarus americanus )

Bris, Arnault Le; Pershing, Andrew J.; Gaudette, Julien; Pugh, Tracy L.; Reardon, Kathleen

doi:10.1016/j.fishres.2016.09.008

Cited by 32 publications

(20 citation statements)

References 30 publications

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“…Both global and regional SST continue to break recordsand the rate of warming has increased compared to earlier long-term trends. However, due to thermal stratification there is a decoupling of various layers if the water column so that bottom temperature is a better standard for analyzing benthic organisms such as lobsters [2] . This paper analyzes the effect of ocean bottom temperature on lobster catch.…”

Section: Introductionmentioning

confidence: 99%

Implications of ocean bottom temperatures on the catch ability of American lobster

2019

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Since the beginning of the satellite era, the general trend of global and regional sea-surface temperature (SST) have continued to rise and, in the recent decade, the rate of warming has increased dramatically in the Gulf of Maine. However, due to variations in thermal stratification in the water column, SST is not the best measure to determine the impact on benthic organisms. So understanding the spatial and temporal variations of the ocean bottom temperature is critical to fisheries management. Since 2001, the Environmental Monitors on Lobster Traps (eMOLT) project has been implemented. The lobster fishermen have volunteered to collect bottom temperature and American lobster catch data from dozens of locations off the New England coast. Now we can use these data to analyze the relationship between ocean bottom temperature and lobster catch. Using data collected over the past decade, we examine the effect of temperature, temperature change, soak time and other factors on the catchability of lobsters. Our results suggest that there is a increase in catchability at the same time there is a) a temperature rise over many years and b) day-to-day temperature changes.

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Section: Introductionmentioning

confidence: 99%

Implications of ocean bottom temperatures on the catch ability of American lobster

2019

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“…In contrast, being territorial, lobsters do not form dense aggregations that harvesters can target, and the size of commercial-size lobsters, plus their hard carapace, means they have no effective natural predators (other than cannibalism; Hanson and Lanteigne 2000;Davis et al 2004;Hanson et al 2014). The lobster fishery has long been a recruitment fishery, and for over a century, sexually immature animals were heavily fished, apparently with the concomitant decrease in size at maturity (LeBris et al 2017;Haarr et al 2018). Recent management efforts have sought to move the MLS to or above the SOM 50 as a means of increasing egg production (Rondeau et al 2015;DFO 2016).…”

Section: Discussionmentioning

confidence: 99%

“…This is particularly true for long-lived decapod crustaceans, such as American lobster (Homarus americanus), where techniques to determine age are only now being developed (e.g., Kilada et al 2012). There is, however, limited information on temporal changes in size-at-maturation of female lobster, consistent with expectations from theory, which can yield insight into possible fisheries effects on lobster demographics (LeBris et al 2017;Haarr et al 2018).…”

Section: Introductionmentioning

confidence: 99%

American lobster: persistence in the face of high, size-selective, fishing mortality — a perspective from the southern Gulf of St. Lawrence

Comeau

Hanson

2018

Can. J. Fish. Aquat. Sci.

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The American lobster (Homarus americanus) population in southern Gulf of St. Lawrence has long been subjected to high exploitation, and yet its population is currently at a high and increasing abundance level. The lobster fishery management is based on effort-control, with a short season, mandatory release of egg-bearing females, and strict enforcement of regulations. Another important factor is the high survival of lobster returned to the water. The combination of a minimum legal size limit and either an upper size limit for females or an effective size limit due to entrance-ring size on the traps has resulted in a slot fishery after which the larger, most fecund animals have low vulnerability to the fishery. These efforts to protect large individuals have had a positive effect on lobster larval production, which may lead to even higher adult population numbers. Comparisons with the management of snow crab (Chionoecetes opilio) and Atlantic cod (Gadus morhua) quota-based fisheries were made to try to explain the different trajectories that these three species’ populations have taken since the 1960s.

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“…According to Saputra et al, (2008), the average size of caught lobsters or the size of the first catch are ideally not less than half of infinite length (L∞). Homarus americouldus variant falls under one of the faster lobsters in developing their gonad fertility, affected by warm temperature (Bris et al, 2016). This correlation may as well serve as an indicator that there is a correlation between climate change to the gonad fertility scale of a fish.The result of the length analysis could be acquired from the carapace length.…”

Section: Size Structurementioning

confidence: 93%

Lobster Population Parameter in Bumbang Bay, Central Lombok <i><br>[Parameter Populasi Lobster Perairan Teluk Bumbang, Lombok Tengah]<i><br>

Yonvitner

Imran

Martasuganda

et al. 2019

JIPK

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Bumbang bay is one of the lobster fishing areas in Central Lombok District, where fishing is carried out at all times and has the potential to disrupt the sustainability of the population in the future. Data is collected from the stock of lobster stocks that are still in fishing cages. Potential risks and fishing pressure could be assessed through length and weight, growth, structure size and potential recruitment analysis. The results of the study found 6 species of lobsters, of which are 2 dominant species were pearl lobster (45.5%) and sand lobster (44.5%) of the total catch. The Length and weight relationship have a negative allometric pattern which is (pearls lobster b = 2.04 and sand lobster = 1.2). The growth rate is relatively slow with a growth rate coefficient of 0.2-0.49 per year. Therefore, recruitment per biomass from the population is also low and exploitation rate about 0.6. The population growth and recruitment relatively low and increasing the exploitation rate, potential to unsustainable of the lobster population in the future.AbstrakPerairan Teluk Bumbang adalah salah satu pusat perikanan lobster di Lombok Tengah, dimana penangkapan dilakukan setiap waktu dan berpotensi mengganggu keberlanjutan populasi dimasa yang akan datang. Potensi risiko dan tekanan penangkapan dapat dikaji melalui analisis panjang dan bobot, pertumbuhan, struktur ukuran dan potensi recruitment. Hasil penelitian ditemukan sebanyak 6 jenis lobster, dimana 2 jenis dominan yaitu lobster mutiara (45,5%) dan lobter pasir 44,5% dari total tangkapan. Hubungan panjang dan berat memiliki pola allometrik negatif (lobster mutiara b=2,04 dan lobster pasir =1,2). Pertumbuhan tergolong lambat dengan koefisien laju pertumbuhan 0,2-0,49 per tahun. Begitu juga recruitment per biomass dari populasi juga rendah dan eksploitasi tergolong tinggi yaitu 0,6. Kemampuan tumbuh yang lambat dengan recruitment yang rendah serta eksploitasi tinggi, potensial menganggu keberlanjutan populasi lobster dimasa yang akan datang.

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Multi-scale quantification of the effects of temperature on size at maturity in the American lobster ( Homarus americanus )

Cited by 32 publications

References 30 publications

Implications of ocean bottom temperatures on the catch ability of American lobster

Implications of ocean bottom temperatures on the catch ability of American lobster

American lobster: persistence in the face of high, size-selective, fishing mortality — a perspective from the southern Gulf of St. Lawrence

Lobster Population Parameter in Bumbang Bay, Central Lombok <i><br>[Parameter Populasi Lobster Perairan Teluk Bumbang, Lombok Tengah]<i><br>

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