Growth of shrimps, crabs and lobsters - an assessment

Mauchline, J.

doi:10.1093/icesjms/37.2.162

Cited by 99 publications

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“…Despite long appreciation of the underlying principles (Kurata 1962;Mauchline 1976Mauchline , 1977Bliss 1985;Gore 1985), and their articulation by Hartnoll (1982), the present study represents a novel practical application of this understanding to measure in situ growth rates. No further consideration is given here to the stock assessment issues.…”

Section: Methods-underlying Principlesmentioning

confidence: 99%

“…Both features generally vary through life, resulting in ontogenetic changes in relative growth rate (Kurata 1962;Mauchline 1976Mauchline , 1977Hartnoll 1982); both are variously influenced by the ambient environment (Hartnoll 1982).…”

Section: Methods-underlying Principlesmentioning

confidence: 99%

“…The resulting Hiatt growth diagram plotted with these values is accordingly a hybrid version of the customary consistent pairing of specimen or exuvial values (Hiatt 1948;Mauchline 1976). Consideration of the impact of this modification is reserved for the Discussion.…”

Section: Methods-underlying Principlesmentioning

confidence: 99%

“…0.4 mm at hatch to the approximate maximal size [L ϱ ] of 6.1 mm) is quite remarkable, if as yet unexplained. Growth increment is generally maximal at intermediate size and declines in smaller and larger individualsthe basis on which Mauchline (1976) propounded the use of a hyperbolic, rather than linear equation to describe the Hiatt line. The hyperbolic relationship fitted to the present data [(CL i Ϫ 1.237)(CL iϩ1 Ϫ 5.230) ϭ Ϫ 2.658] using her method yields a very realistic estimate of asymptotic size (L ϱ ϭ 5.66 mm), but otherwise predicts nonsensical negative growth in both small and large size classes.…”

Section: Methods-underlying Principlesmentioning

confidence: 99%

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Rapid estimation of in situ growth rates of Caridina nilotica (Crustacea: Decapoda) inLake Victoria: Description and pilot application of a simple, field‐compatible technique

Hart

2001

Limnology & Oceanography

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A simple rapid approach to estimating in situ growth rates of Caridina nilotica (Roux), a small shrimp that plays a pivotal role in Lake Victoria's food web, is described. The approach, potentially applicable to many arthropods, is based on moulting intervals (MI) and per moult size increments (PMI) determined during brief experimental confinements. Physiological justification of its reliability as a measure of in situ rates is given. Caridina moults at night. Feral animals collected shortly (≤2 h) before dusk were sorted into one of five arbitrary size classes and held around 27°C overnight without food. MI, the inverse proportion of a batch moulting overnight, increased from 2 d in small shrimps (carapace length [CL] ≤1.8 mm) to >9 d in larger animals (CL ≥4.3 mm)‐a value comparable to egg development time (10.3 d) at the corresponding temperature. PMI was measured from differences in CL of postecdysal shrimps (CLi‐1) and corresponding cast exuviae (CLi). In absolute terms, PMI, surprisingly, was constant (0.284 ± 0.027 mm moult−1) over the size range of shrimps tested, although relative growth (PMI as a percentage of CLi) declined with size. Growth trajectories modeled with regressions fitted to the data (MI = 1.573 x CL0.999 and CLi‐1 = 0.284 + 0.977 x CLi) show that C. nilotica grows significantly faster (by at least 20%) in L. Victoria than previously estimated (Ignatow et al.), with corresponding implications to other evaluations of lake productivity. Prospective refinements and future uses for this simple technique are outlined.

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Section: Methods-underlying Principlesmentioning

confidence: 99%

Section: Methods-underlying Principlesmentioning

confidence: 99%

Section: Methods-underlying Principlesmentioning

confidence: 99%

Section: Methods-underlying Principlesmentioning

confidence: 99%

See 2 more Smart Citations

Rapid estimation of in situ growth rates of Caridina nilotica (Crustacea: Decapoda) inLake Victoria: Description and pilot application of a simple, field‐compatible technique

Hart

2001

Limnology & Oceanography

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“…GROWTH McCaughran & Powell (1977) and Mauchline (1977) summarised the problems of applying classical fishery growth functions to crustacean growth, and suggested alternative strategies. From these studies it is clear that the frequency of moulting and the magnitude of the growth increment at each moult must be included, but there has been no comparative study of the results of applying classical fisheries growth functions versus empirical growth functions based on moult frequencies and increments to yield models.…”

Section: Dynamic Pool Models Backgroundmentioning

confidence: 99%

Application of yield models to the New Zealand rock lobster fishery

Saila

Annala

McKoy

et al. 1979

New Zealand Journal of Marine and Freshwater Research

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Two general types of yield model, stock production and dynamic pool (yield-per-recruit), were used to analyse available data for the New Zealand rock lobster, Jasus edwardsii (Hutton). An exponential stock production model was applied to commercial catch and effort data from 1945 to 1975 for the North and South Islands combined. The results suggest a maximum sustainable yield of 4227 t with an estimated optimal level of fishing effort of 784 vessels, about 60% of the 1975 number. Empirical and von Bertalanffy growth equations were derived from limited tag-recapture data from the Gisborne area. Both equations indicate that males grow faster than females. The empirical growth equation, based on moult increment and frequency as functions of size, is considered the more realistic. Two yield-per-recruit models provided different results, especially at low levels of natural and fishing mortality. One model (Beverton-Holt) incorporated the von Bertalanffy growth equation and the other (empirical model) an empirical growth equation; the latter model is considered more realistic. The empirical model suggests that a reduction in fishing mortality below the estimated present values will not result in a substantial increase in yield-per-recruit. No strong evidence for changing the minimum size at first capture emerged from the results of the empirical model. A need is evident for more data, spanning a greater size range, to provide better estimates of growth and natural mortality, because the yield-per-recruit models were found to be sensitive to both. INTRODUCTIONThe reck lobster, Jasus edwardsii (Hutton), is of great economic significance, and is now the single most valuable renewable resource taken by the New Zealand fishing industry. The fishery began to expand rapidly with the development of export markets in the latf 1940s. The latest statistics show that about 1979 t, [valued at approximately N.Z. $23 667 000 were exported in 1977 (Anon. 1978), compared with 1799 t ^valued at N.Z. $4 619 000 in 1966. Thus, it seems prudent to develop management plans as quickly as possible to ensure sustained high productivity cf this resource and to avoid the results of over-fishing.Some information on the geographic distribution, breeding biology, and development of this species is availab , e (Kensler 1967, Sorensen 1969. Street 1970Street , 1973a has provided important information on growth, moulting, movements, reproductior, and predation, and estimates of exploitation rates from field observations and marking studies. Kenslet (1968) examined the size-fecundity relationship ofj a limited number of females.Streejt (1973a, b) described some of the management measures being used and their probable significance, but management regulations should be reexamined in the light of recent information. Since 1974 a tagging programme has been carried out by personnel of the Fisheries Research Division using the western rock lobster tag (Chittleborough 1974), which is retained through ecdysis. In addition, catch sampling, analysis of fishi...

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Growth and Development: Understanding and Modelling Growth Variability in Lobsters

Wahle

Fogarty

2006

Lobsters: Biology, Management, Aquaculture and Fisheries

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Growth of shrimps, crabs and lobsters - an assessment

Cited by 99 publications

References 0 publications

Rapid estimation of in situ growth rates of Caridina nilotica (Crustacea: Decapoda) inLake Victoria: Description and pilot application of a simple, field‐compatible technique

Rapid estimation of in situ growth rates of Caridina nilotica (Crustacea: Decapoda) inLake Victoria: Description and pilot application of a simple, field‐compatible technique

Application of yield models to the New Zealand rock lobster fishery

Growth and Development: Understanding and Modelling Growth Variability in Lobsters

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