The Benefits of Rationalization: The Case of the American Lobster Fishery

Steinback, Scott R.; Allen, Richard B.; Thunberg, Eric M.

doi:10.1086/mre.23.1.42629601

Cited by 12 publications

(10 citation statements)

References 21 publications

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“…The model fits the data well and both coefficients are significant at 1% level. Estimates (Table 1) appear to be similar to those found in the literature (French McCay et al 2003;Steinback et al 2008). However, unlike others, this methodology does not use individual weight data.…”

Section: Estimation and Resultssupporting

confidence: 86%

“…Estimates for the American lobster weight-length relationship can be found in the scientific literature (e.g., French McCay et al 2003;Steinback et al 2008). French McCay et al use data from individual weight and carapace length of lobsters collected by research trawls in Rhode Island estimating the weightlength relationship to be W ¼ 0:001143L 2:934 for the whole lobster population.…”

Section: Methodsmentioning

confidence: 99%

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Estimating weight–length relationships without individual weight data: an application to the American lobster (Homarus americanus) fishery of Long Island Sound

Baggio

2011

Rev Fish Biol Fisheries

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The estimation of weight-length relationship of fish species requires having data on individual weight and length. However, individual weight data are often not available because they are too expensive or not feasible to gather and the relationship cannot be explicitly estimated. Yet, in this paper I develop a simple methodology that allows me to estimate a weight-length relationship when only aggregate weight data are available. To show its usefulness, the methodology is applied to the American lobster (Homarus americanus) population of Long Island Sound. Results indicate the existence of isometric growth for American lobsters in this geographical location: W = 0.000924L 2.9619 . The estimated relationship is used to predict individual weight of lobsters which are then used to construct biomass indexes for three size classes of lobsters for the time period 1987-2006. This analysis suggests that is not necessary to invest efforts in collecting individual weight data to be able to construct meaningful indicators of fish population.

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Section: Estimation and Resultssupporting

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Estimating weight–length relationships without individual weight data: an application to the American lobster (Homarus americanus) fishery of Long Island Sound

Baggio

2011

Rev Fish Biol Fisheries

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“…The negative allometry, i.e., a decreasing growth rate of TL vs. CL and CL vs. W for both sexes, reflects a morphological change from an elongated body towards a heavier one, as also reported by Martínez-Calderón et al [34] for the Caribbean spiny lobster (Panulirus argus) and Radhakrishnan et al [87] for Panulirus homarus. French McCay et al [84] reported a coefficient b of 2.934 for an American lobster population, which is similar to our results that gave a coefficient b below 3 for both sexes, while Steinback et al [85] reported a coefficient b of 3.347 for males and 2.972 for females for American lobster. Baggio [37] reported isometric growth of H. americanus (CL vs. W).…”

Section: Discussionsupporting

confidence: 90%

“…Morphometric relationships and allometry were studied in many crustacean species, including crabs [80,81], spiny lobsters [34,82,83], American lobster [37,84,85], and European lobster [27,33,38]. In the present study, ordinary least-square regressions showed that W increased following a power function with both CL and TL, while TL and AW increased linearly with CL.…”

Section: Discussionmentioning

confidence: 47%

Population Characteristics of the European Lobster, Homarus gammarus in the Adriatic Sea: Implications for Sustainable Fisheries Management

Pavičić

Matić‐Skoko

Vrdoljak

et al. 2021

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The European lobster, Homarus gammarus, was sampled from September 2016 to August 2017, using pots and gillnets in the Eastern Adriatic Sea. Official landings were also analyzed (2008–2020). The majority of landings were from the Northern Adriatic and showed an increase of 18.5% over the study period. Results revealed an extremely low catch rate that fluctuated significantly by season. Dominance by specimens in the size classes of 90–110 mm carapace length (CL) was observed. Experimental design revealed spatial heterogeneity, with larger individuals caught further from the coast (>3 nm) and undersized specimens caught near the coast (<3 nm). With increasing CL and total length (TL), an increase in weight was higher in males than females. TL and abdomen width (AW) increased linearly with CL and were more pronounced in females. At 80 mm CL, females started to develop secondary sex characteristics with wider AW than males. The results suggest that the modern legal framework is appropriate for lobster fisheries and a longer fishing season is not advisable, despite a positive catch trend in the northern part of the sea. Additional efforts are desirable to reduce fishing pressure in the coastal part. The morphometric relationships could reveal population characteristics required as inputs in stock assessment analysis for effective management.

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“…Nonetheless, the size range (4.72-11.98 cm CL) found in this study coincides with that reported in P. polyphagus at the Arabian Sea (Gujarat, India; size interval of 3.5-11.0 cm CL) (Kizhakudan and Patel, 2010). The positive growth allometry in males and negative growth allometry in females of P. polyphagus based on the deviation of regression coefficient b from 3 are expected and commonly observed in crustaceans of good population health (Fazhan et al, 2021a), including other lobster species (Hossain et al, 1987;Steinback et al, 2008). In crustaceans, males would channel most of their energy into the somatic growth to increase their chances in territorial defense and mating, whereas females would focus more on maximizing reproductive outputs ( Elner and Campbell, 2009;Waiho et al, 2015).…”

Section: Discussionmentioning

confidence: 89%

Size Distribution, Length-Weight Relationship, and Size at Morphometric Maturity of the Mud Spiny Lobster Panulirus polyphagus (Herbst, 1793) in the Johor Strait

et al. 2021

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Spiny lobsters of the genus Panulirus are economically important and support local fishing communities. However, mud spiny lobster Panulirus polyphagus is among the least known species within this genus in terms of their biological information. This study relates to the size distribution, length-weight relationship, and size at morphometric maturity of P. polyphagus in the Johor Strait. Within the year 2010, 300 specimens were collected off the coast of Johor Strait, Malaysia. There was no significant difference in body size (cephalothorax length, CL) and body weight (BW) between sexes. CL and BW were highly correlated and males of P. polyphagus displayed positive growth allometry, whereas the opposite was observed in females. Based on the merus (ML) and carpus length (CPL) of the third right walking leg, the piecewise linear regression analysis estimated that the size at maturity for male was 6.58 cm CL (based on ML) and 7.58 cm CL (based on CPL), whereas it was 8.18 cm CL (based on ML) and 6.75 cm (based on CPL) for females. Two discriminant functions of high classification and revalidation rates (> 98.6% in males and > 98.7% in females) that can discern maturation status in males and females of P. polyphagus were derived using the discriminant function analysis. Biological information derived from this study serves as an essential baseline for future fishery management and conservation of P. polyphagus.

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The Benefits of Rationalization: The Case of the American Lobster Fishery

Cited by 12 publications

References 21 publications

Estimating weight–length relationships without individual weight data: an application to the American lobster (Homarus americanus) fishery of Long Island Sound

Estimating weight–length relationships without individual weight data: an application to the American lobster (Homarus americanus) fishery of Long Island Sound

Population Characteristics of the European Lobster, Homarus gammarus in the Adriatic Sea: Implications for Sustainable Fisheries Management

Size Distribution, Length-Weight Relationship, and Size at Morphometric Maturity of the Mud Spiny Lobster Panulirus polyphagus (Herbst, 1793) in the Johor Strait

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